Showing papers on "Spray tower published in 2020"

Modeling Study of Selenium Migration Behavior in Wet Flue Gas Desulfurization Spray Towers.

Abstract: Wet flue gas desulfurization (WFGD) system is the core equipment for removing SO2 from coal-fired power plants, and it also has an important synergistic effect on the removal of selenium. However, the removal efficiency of Se across WFGD systems is not as expected, and it varies greatly in different coal-fired units (12.5-96%). In this study, a mathematical model was established to quantitatively describe the selenium migration behavior in WFGD spray towers, including the conversion of gaseous selenium to particulate selenium and the capture of gaseous SeO2 and particles by droplets. The calculation results show that the behavior of selenium in the spray tower can be divided into three stages: preparation, condensation, and removal. The condensation stage significantly affected the selenium distribution and its total removal efficiency. Furthermore, five factors which may affect the selenium behavior were investigated. Among them, the inlet particle size distribution and the droplet temperature had great impacts on the outlet selenium concentration, which may be the reason for the unstable selenium removal efficiencies. This study can help in understanding the migration process of selenium in WFGD spray towers and provide some guidance for the development of specific selenium control technologies.

Simultaneous removal of SO2 and NO using a spray dryer absorption (SDA) method combined with O3 oxidation for sintering/pelleting flue gas

Abstract: Based on the demand of sintering/pelleting flue gas ultra-low emission, a semi-dry method using a spray dryer absorber (SDA) combined with O3 oxidation was proposed for simultaneous removal of SO2 and NO. Effects of O3 injection site, O3/NO molar ratio, and spray tower temperature on the removal efficiencies were investigated. It was revealed that both desulfurization and denitrification efficiencies could reach to 85% under the conditions of setting O3 injection site inside of tower, O3/NO molar ratio 1.8, spray tower temperature 85°C, Ca/(S + 2 N) molar ratio 2.5 and slurry flow rate 300 mL/hr. CaSO3/Ca(OH)2 mixture slurry was used as absorbent to simulate operating conditions in iron and steel industry. The result shows that the addition of CaSO3 weakens both removal efficiencies. In addition, the reaction mechanism of simultaneous removal of SO2 and NO using SDA combined with O3 oxidation was proposed.

VOCs waste gas treatment equipment

Abstract: The utility model relates to VOCs waste gas treatment equipment. The utility model belongs to the technical field of waste gas treatment, the device comprises an induced draft fan I, a filter box, a cyclone dust collector, a spray tower, a combustion box and a heat exchanger which are sequentially connected together from front to back, a filter screen is inserted into the filter box; a spraying pipe is arranged at the upper part in the spraying tower; a partition plate is arranged in the middle of the interior of the spray tower; gaps exist between the partition plates and the top end and thebottom end of the spray tower; the spray pipe is communicated with a water pump arranged outside the spray tower, a liquid discharge pipe is arranged at the bottom end of the spray tower, an air distribution plate is arranged at the inlet end inside the combustion box, an aeration pipe, two combustors and a catalyst bed are further sequentially arranged inside the combustion box from the inlet endto the outlet end, and the aeration pipe is connected with a second induced draft fan arranged outside the combustion box. According to the VOCs waste gas treatment device, pretreatment is carried out before catalytic combustion treatment is carried out on VOCs waste gas, so that the burden of subsequent catalytic combustion treatment is reduced, and the high-concentration and high-flow treatmenteffect and treatment efficiency are improved.

Efficient spray tower with anti-freezing function

Abstract: The invention relates to an efficient spray tower with an anti-freezing function The efficient spray tower comprises a body, a water tank, a filler layer, a spraying device and an air inlet pipe Ananti-freezing mechanism and a cleaning mechanism are further included The cleaning mechanism comprises a supporting net, a rotary disc and two connecting assemblies The anti-freezing mechanism comprises a connecting shaft, a stirring plate, a first gear, a second gear, fan blades, a driving shaft, a supporting assembly, a limiting assembly, a sliding sleeve, a second spring, a buffer plate and two mounting bearings; the connecting assembly comprises a connecting sleeve, a connecting rod and a first spring; the limiting assembly comprises a limiting groove and a limiting block According to the efficient spraying tower with the anti-freezing function, water in the water tank is kept flowing through the anti-freezing mechanism, the probability that the water is frozen is reduced, the anti-freezing performance of the spray tower is improved, sludge in the filler layer can be shaken out through the cleaning mechanism, the probability that the filler layer is blocked is reduced, and the purification effect of the spray tower is improved

Spray tower with double filtration and decomposition functions

Abstract: The utility model relates to the technical field of waste gas treatment, and discloses a spray tower with double filtration and decomposition functions, which comprises a spray tower, a filter box isfixedly connected to the upper end of the left outer side wall of the spray tower, an air inlet pipe is fixedly connected to the left end of the filter box, a primary filter screen is fixedly arrangedin the filter box, and an L-shaped pipe is fixedly connected to the lower end of the filter box. The horizontal part of the L-shaped pipe penetrates through the side wall of the spraying tower and extends into the spraying tower, the lower inner side wall of the spraying tower is fixedly connected with a liquid suction pump, the output end of the liquid suction pump is fixedly connected with a liquid conveying pipe, and the end, away from the liquid suction pump, of the liquid conveying pipe sequentially penetrates through the lower end of the rear side wall and the upper end of the rear sidewall of the spraying tower and extends into the spraying tower. According to the utility model, waste gas particles are prevented from blocking the spraying head, the effect of continuous use of spraying liquid is ensured, the filtering efficiency is high, meanwhile, the continuous filtering effect of the spraying tower can be ensured, and people can conveniently carry out centralized treatment on the filtered waste gas particles.

Automobile paint film corrosion resistance and washing resistance testing device

Abstract: The utility model discloses a device for testing corrosion resistance and washing resistance of an automobile paint film. A portal frame is arranged above the workbench. The portal frame can slide inthe X-axis direction and comprises a high-pressure water pipe connected to a high-pressure water spraying machine, the high-pressure water spraying machine is connected with an acid solution, the washing resistance of a paint film is tested through regular and constant-pressure water pressure washing, washing liquid is the acid solution and is closer to a severe use environment, and the test result is more accurate; the device further comprises a spray tower and a mist collecting funnel which are used for salt spray testing, and can simulate salt spray environment conditions to assess the corrosion resistance of products or metal materials, so that a salt spray environment is formed to assess the salt spray corrosion resistance quality of the products.

Ship flue gas desulfurization wastewater treatment process

Abstract: The invention relates to a ship desulfurization wastewater treatment process An adopted system mainly comprises three main modules: 1, a seawater desalination module, which comprises a lifting pump,a security filter, a reverse osmosis membrane assembly, a fresh water storage tank and other units; 2, a flue gas desulfurization module which comprises a circulating water tank, a heat exchange system, a desulfurization spray tower, a cooling water pump and other units; and 3, a wastewater treatment module which comprises a desulfurization wastewater lifting pump, a ceramic membrane assembly, a fine reverse osmosis membrane assembly, an adsorption tank, a centrifugal machine, a residue storage tank and other units The ship flue gas desulfurization wastewater treatment process comprises an open process and a closed process

Cyclone hybrid spray tower for organic waste gas treatment

Abstract: The utility model discloses a cyclone hybrid spray tower for organic waste gas treatment. The utility model relates to the technical field of waste gas purification. The device comprises a tower drum,wherein a spraying chamber, a cyclone separation chamber and a water collecting chamber which are communicated with one another are sequentially arranged in the tower barrel from top to bottom; the tower drum is provided with an exhaust port at the top of the spraying chamber, the spraying chamber is fixedly provided with a shower nozzle at the exhaust port, the water collecting chamber is connected with a drain pipe, the side wall of the cyclone separation chamber is connected with an air inlet pipe, the spraying direction of the air inlet pipe is tangent to the inner wall of the cyclone separation chamber, and an atomizing nozzle is arranged at an outlet of the air inlet pipe; a tubular air outlet sleeve extends from the spraying chamber to the water collecting chamber along the axis inthe cyclone separation chamber, an air outlet gap communicated with the inside and the outside of the air outlet sleeve is formed in the sleeve wall of the air outlet sleeve along a bus, a nano titanium dioxide coating is fixedly arranged on the inner wall of the air outlet sleeve, and an ultraviolet lamp is fixed in the air outlet sleeve along the axial direction. The organic gas treatment device has the effects that dust removal and organic gas reduction are integrated, and the organic gas treatment efficiency is improved.

Boiler tail gas purification device

Abstract: The utility model provides a boiler tail gas purification device which comprises a boiler, and the boiler is connected to a smoke dust treatment device through a first pipeline; the smoke dust treatment device is connected to the lower part of the spray tower through a second pipeline; a spraying device is arranged in the spraying tower, the spraying device is connected with a water suction pump,and the water suction pump is arranged at the bottom of a water pool containing an alkaline solution; a liquid PH detector is further arranged at the bottom of the water tank; a tail gas discharge pipe is arranged at the top of the spray tower, and a gas PH detector is arranged in the tail gas discharge pipe; a discharge pipe is arranged at the bottom of the spray tower and is designed corresponding to the upper part of the water tank; the liquid PH detector, the gas PH detector and the water suction pump are all electrically connected to the control cabinet. According to the utility model, particulate matters in the boiler tail gas are removed through the smoke dust treatment device, then the boiler tail gas is cooled through alkaline solution spraying, and meanwhile, acidic matters in the tail gas are removed.

Dust removal and purification device for flue gas

Abstract: The invention relates to the field of flue gas dust removal, and discloses a dust removal and purification device for flue gas. The device comprises a plurality of absorption spray towers mounted in series, wherein gas inlets are formed in the side surfaces of the lower parts of the absorption spray towers, gas outlets are formed in the tops of the absorption spray towers, and the gas outlets andthe gas inlets of the adjacent absorption spray towers communicate with each other through pipelines; each absorption spray tower is a vertical cylinder with an opening in the lower end, is mounted ona water storage tank and communicates with an inner cavity of the water storage tank; an inverted hanging partition plate is arranged at a position, between two absorption spray towers, of the waterstorage tank, a gap is reserved between the bottom edge of the inverted hanging partition plate and the bottom of the water storage tank, and the other side edges of the inverted hanging partition plate are hermetically arranged relative to the water storage tank; and a foaming mechanism and at least one spraying mechanism are mounted in each absorption spraying tower, the foaming mechanism is located below the spraying mechanism, the spraying mechanism can utilize water stored in the water storage tank for spraying dust removal of flue gas, and the foaming mechanism can generate steam bubblesfor adsorption dust removal of flue gas impurities. The dust removal and purification device provided by the invention overcomes the problems that existing dust removal equipment for flue gas is lowin purification efficiency and incomplete in flue gas purification.

Waste gas purification spray tower for rare earth preparation

Abstract: The embodiment of the utility model discloses a waste gas purification spray tower for rare earth preparation. Spray tower, an air outlet is formed in the top end of the spray tower; a water pumping pipeline is fixedly connected to the lower left corner of the spraying tower, a circulating water pump is fixedly connected to the right end of the water pumping pipeline, a drainage pipeline is fixedly connected to the top end of the circulating water pump, a booster pump located above the circulating water pump is fixedly connected to the bottom of the drainage pipeline, and a fixing ring is fixedly connected to the top end of the drainage pipeline. The utility model provides a waste gas purification spray tower for rare earth preparation. Passing roller and protective net, the activated carbon can be in full contact with the waste water after absorbing the waste gas in the rolling process; the contact efficiency of activated carbon and wastewater is greatly improved, a large number of harmful substances are prevented from flowing into the water storage tank, it is guaranteed that a water source can be recycled for a long time, a large number of water resources are saved, the purification effect of the device is improved, and the rationality and feasibility of the device are improved.

Industrial furnace tail gas dust removal VOCs degradation system

Abstract: The utility model discloses a VOCs degradation system for industrial furnace tail gas dust removal. The device comprises an organic waste gas outlet and a combustion tail gas outlet, the organic wastegas outlet is connected with a first alkali liquor spray tower; the combustion tail gas outlet is connected with a second alkali liquor spray tower; an alkali liquor storage tank and a gas washing water tank are arranged between the first alkali liquor spray tower and the second alkali liquor spray tower; the first alkali liquor spray tower is communicated with the alkali liquor storage pool through a first return pipe; the second alkali liquor spray tower is communicated with the alkali liquor storage pool through a second return pipe; organic waste gas and combustion waste gas are separately treated through the first alkali liquor spraying tower and the second alkali liquor spraying tower, the treatment efficiency is improved, gas which is harmless to the environment and free of pollution is discharged after treatment through the UV photocatalyst activated carbon device and the dust removal device, industrial waste gas purification is achieved, green production is met, and further development of enterprises is facilitated.

Bag type dust collector for removing dust from high-temperature flue gas

Abstract: The utility model relates to a bag type dust collector for removing dust from high-temperature flue gas. Wherein trundles and ground feet are fixedly connected to the bottom of the mounting base, anda cooling spraying system and a dust removal system are arranged on the mounting base; the dust removal system comprises a dust removal box body fixedly connected with a dust collection hopper; a fanmounting plate and a pattern plate are arranged in an inner cavity of the dust removal box body and divide the dust removal box body into a dust removal chamber, a gas collection chamber and a fan chamber; a fan is fixedly connected in the fan chamber, and a reciprocating driving device is arranged in the gas collecting chamber; a tube cage switching assembly is inserted into the pattern plate, the upper part of the tube cage switching assembly is connected with a venturi tube, and the lower part of the tube cage switching assembly is clamped with a bag cage assembly; an air inlet pipe sectionis fixedly connected to the dust removal box body; the cooling spray system comprises a cooling spray tower, and a spray header pipe which extends into the inner cavity and is provided with spray heads is connected to the cooling spray tower; and a demister is arranged in an inner cavity of the cooling spray tower. The device is flexible to move, good in dust removal effect, capable of being usedfor high-temperature flue gas treatment and long in service life.

Organic waste gas treatment system comprising heat accumulating type oxidizer

Abstract: The utility model discloses an organic waste gas treatment system comprising a heat accumulating type oxidizer. The device comprises a spray tower, a photocatalysis box, a heat accumulating type oxidizer main body and a bottom plate, a spraying tower is fixed to one end of the top of the bottom plate, an air inlet fan is fixed to one end of the spraying tower, a water collecting tank is arranged at the bottom end in the spraying tower, a water pump is arranged in the water collecting tank, spraying devices are evenly arranged in the spraying tower above the water collecting tank, and a tail gas detection device is arranged at the top end of one side of an exhaust pipe. According to the utility model, the spraying tower, the air inlet fan, the protective net, the spraying device, the sprayhead, the uniform distribution plate, the preformed holes, the first air guide pipe, the photocatalysis box, the ozone ultraviolet lamp tube and the photocatalyst filter screen are arranged; after organic waste gas is pumped into the spray tower by the air inlet fan, spray liquid is sprayed out of the spray heads and is combined with the waste gas, and dust particles fall down along with liquid drops due to collision, interception and condensation effects between the dust particles and the liquid drops.

Acid mist spraying device with liquid medicine adding structure

Abstract: The utility model discloses an acid mist spraying device with a liquid medicine adding structure. Spray tower, the acid mist inlet port is formed in the bottom of the side wall of the spray tower; a liquid collecting water tank is fixed at the bottom of the spray tower; a spraying water tank is fixed outside the spraying tower; the liquid collecting water tank is communicated with the spraying water tank through a circulating water pipe; a spray nozzle is arranged at the top of the spray tower; a booster water pump is fixed in the spraying water tank; the booster water pump is connected with the spray nozzle through a spray guide pipe, an annular protrusion is fixed to the inner wall of the spray guide pipe, liquid medicine spray holes are evenly fixed to the inner annular face of the annular protrusion, a liquid medicine storage box is further fixed to the outer portion of the spray tower, a pump body is fixed in the liquid medicine storage box, and a flow adjusting valve is arrangedon the liquid medicine guide pipe. The acid mist purification device is reasonable in structural arrangement, capable of guaranteeing that the liquid medicine content of spray liquid in the spray nozzle is uniform, beneficial to improving the neutralization efficiency of acid mist and improving the purification effect of the acid mist, high in applicability and good in practicability.

Combined heat and power generation flue gas waste heat deep utilization and white smoke elimination system

Abstract: The utility model discloses a combined heat and power generation flue gas waste heat deep utilization and white smoke elimination system, and belongs to the field of boiler heat supply and energy comprehensive utilization. The system is composed of a boiler, a chimney, a booster fan, a spray tower, a flue gas heat exchanger, a heat pump and other connecting pipelines. Part of tail flue gas from aboiler enters the spray tower through the booster fan, performs sufficient countercurrent contact heat exchange with spray circulating water from the heat pump in the spray tower, is heated by heat supply network return water in the flue gas heat exchanger, is discharged to a chimney, and finally enters the atmosphere. Heat supply network water return water enters the heat pump after being subjected to heat exchange and cooling through the flue gas heat exchanger and forms heat supply network water supply after being subjected to two-stage heating, and the heat supply network water supply is sent to a factory heat supply network water supply main pipe. Low-temperature unsaturated flue gas is heated by heat supply network return water, the temperature of the heat supply network return wateris reduced, the design of a heat pump is optimized, boiler exhaust smoke waste heat and condensed water can be deeply recycled, white smoke is eliminated, and the comprehensive energy utilization efficiency of the system is improved.

Asphalt flue gas treatment device

Abstract: The utility model discloses an asphalt flue gas treatment device. The device comprises a first spray tower, a second spray tower, a drying tower, a first plasma dust removal tower and an activated carbon adsorption tower which are sequentially connected through pipelines in the gas flowing direction, a plurality of pieces of wet curtain paper which are obliquely arranged and parallel to one another are arranged in the first spray tower and the second spray tower in the gas circulation direction; a plurality of through holes penetrating through the wet curtain paper are formed in the surface ofthe wet curtain paper; high-voltage electrodes and ground electrode plates are alternately arranged in the first plasma dust removal tower at intervals; the high-voltage electrode and the ground electrode plate are electrically connected with the high-voltage end and the grounding end of an external power supply respectively, the asphalt flue gas treatment device adopts a mode of combining a wetprocess and a dry process, harmful substances in asphalt flue gas can be effectively removed, and the treatment effect is good.

System and method for desulfurization and denitrification integrated treatment and recycling of flue gas by using red mud

Abstract: The present invention relates to a system and method for desulfurization and denitrification integrated treatment and recycling of flue gas by using red mud, and belongs to the recycling and environmental protection technology field The system includes a desulfurization spray tower, an ozone generator, a denitration spray tower, a slurry mixing tank, a slurry storage tank, a vacuum filter, an ammonia water neutralization tank, an aluminum hydroxide precipitation tank, an ammonia water tank, an aluminum hydroxide storage tank, a filter press, an ammonia distillation tower, a dephlegmator, a cooler, a concentrated ammonia water storage tank, a gypsum precipitation tank, and an anaerobic biochemical pool In the present invention, red mud slurry is used for desulfurization and denitrification treatment of flue gas to remove SO2 and NO in the flue gas, so that SO2 and NO in the flue gas reach an emission standard

Spray tower for air purification furnace

Abstract: The invention discloses a spray tower for an air purification furnace, belonging to the technical field of spray towers. The spray tower of the invention solves the problems that the air flow uniformly-distributing effect of the spray tower of a conventional air purification furnace is limited, and the air flow distribution in the spray tower is still not uniform. The spray tower for the air purification furnace of the invention comprises a flow dividing disc and a flow dividing column, wherein the bottom of the flow dividing disc is fixedly connected to one end of an air inlet pipe, and the air dividing column is inserted into the outer part of a fixed ring in an interference manner. The air supply mode of the spray tower is that air is supplied from center of bottom, and air flow entering the tower body is uniformly dispersed through the flow dividing disc and the flow dividing column, so the waste gas in the tower body can uniformly contact and react with liquid sprayed by double-layer spraying rods; and thus, the problems of non-uniform air inflow of the spraying tower of the traditional air purification furnace and overlarge wind speed difference at different positions are solved, the reaction in the tower body is more sufficient, and the practicability of the spray tower is improved.

Efficient dust removal spray tower capable of automatically adjusting spray effect

Abstract: The invention discloses an efficient dust removal spray tower capable of automatically adjusting the spray effect. The tower comprises a tower body, the bottom of the tower body is fixedly connected with a water tank, the water tank fixedly communicates with a water inlet pipe through a water pump, and the top end of the water inlet pipe penetrates through the side wall of the tower body and thenfixedly communicates with a sleeve; the bottom of the part, in the tower body, of the water inlet pipe is fixedly communicated with a plurality of spray heads, the side wall of the tower body is communicated with an air inlet pipe and an air outlet pipe in a penetrating mode, the inner wall of the tower body is rotationally connected with a rotating rod, and the side wall, located in the air outlet pipe, of the rotating rod is fixedly connected with a plurality of impellers. By arranging the conductive springs, the insulating net, the metal coating, the sleeve and other structures, secondary adsorption is conducted on dust in cooperation with spraying, the conductive springs are powered on, the multiple conductive springs contract, the conductive springs pull the inner ring pipe to expandtowards the outer ring, automatic adjustment is conducted, and therefore water flowing in the inner ring pipe in unit time is increased; a large amount of water mist and water drops are combined withdust to fall off, and the spraying dust removal effect is better.

Instant bean flour spray drying device

Abstract: The invention relates to the technical field of bean flour production equipment. The invention further discloses an instant bean flour spray drying device. The spray drying device comprises a spray tower body. A hot air distributor is arranged at the top of the spray tower body. The top of the hot air distributor is fixedly communicated with a connecting pipe. A first pressure pump is arranged inthe middle of the connecting pipe. The end, away from the hot air distributor, of the connecting pipe is fixedly communicated with an air heating box. The top of the connecting pipe is fixedly communicated with a fixing pipe. The top of the fixing pipe is fixedly communicated with a cleaning water tank. A liquid inlet pipe is fixedly communicated with the left side wall of the bottom of the spraytower body, and a second pressure pump is arranged in the middle of the liquid inlet pipe. A liquid box is fixedly communicated with the end, away from the spray tower body, of the liquid inlet pipe.A mounting pipe is fixedly communicated with the right side wall of the bottom of the spray tower body. A discharging opening is fixedly communicated with the bottom of the spray tower body. The liquid inlet speed of the liquid inlet pipe can be adjusted, and the problem that drying is insufficient and wet powder adheres to the inner wall of the spray tower body and is difficult to clean due to the too high liquid inlet speed is avoided.

Automobile coating organic waste gas treatment system and device thereof

Abstract: The invention discloses an automobile coating organic waste gas treatment device, which comprises a base, the top end of the base is connected with a filtering bin; an air inlet is formed in one end of the filtering bin; a spray tower is mounted at the top end of the base corresponding to one side of the filter bin; a combustion box is mounted at a position, corresponding to one side of the spraytower, of the top end of the base; the structure is scientific and reasonable, safe and convenient use, a combustor, a net-shaped catalyst, a heat exchange pipe, a water outlet pipe and a water inletpipe are arranged; the sprayed waste gas can be heated at high temperature; and catalytic conversion is carried out, meanwhile, redundant heat is absorbed; by arranging a water suction pump, a spraying liquid storage bin, a spraying pipe, a dispersing bin and a return pipe, the spraying liquid can be pressurized, pumped out and sprayed, organic gas in waste gas is adsorbed, graded and filtered organic waste gas can be conveniently subjected to spraying treatment, and the spraying liquid can be conveniently and rapidly collected.

Gas treatment device

Abstract: The invention discloses a gas treatment device, comprising an acid absorption spray tower, an alkali absorption spray tower, an ozone generation area, a spray tower, a demisting area, a biological purification area, a defoaming purification area, an exhaust fan and an exhaust funnel which are connected in sequence, wherein a gas inlet in the lower part of the acid absorption spray tower is connected with a waste gas inlet, and a gas outlet in the upper part of the acid absorption spray tower is connected with a gas inlet in the lower part of the alkali absorption spray tower; an upper gas outlet of the alkali absorption spray tower is connected with a gas inlet of the ozone generation area; a gas outlet of the ozone generation area is connected with a gas inlet in the upper part of the spray tower; a gas outlet in the lower part of the spray tower is connected with a gas inlet in the lower part of a demister; an ozone catalytic oxidation filler layer is arranged in the demisting area;a gas outlet in the upper part of the demisting area is connected with a gas inlet in the upper part of the biological purification area; a plurality of second spray heads are arranged above the biological purification area; a gas outlet in the lower part of the biological purification area is connected with a gas inlet in the lower part of the defoaming purification area; a gas inlet in the upperpart of the defoaming purification area is connected with the exhaust fan; and the exhaust fan is connected with the exhaust funnel. The gas treatment device in the invention is high in treatment efficiency and equipment integration degree, and has better adaptability.

Mineral powder drying device

Abstract: The invention relates to the field of industrial mineral powder drying equipment, in particular to a mineral powder drying device. According to the mineral powder drying device, the situation that gasflows out during mineral powder drying is eliminated, and therefore the air environment is effectively protected. The mineral powder drying device comprises a rotary drier. The center axis of the rotary drier is arranged obliquely. The barrel head of the rotary drier is higher than the barrel tail. The rotary drier comprises a water source high-temperature heat pump, a spray tower and an air-cooled chiller unit. The water source high-temperature heat pump communicates with the barrel tail of the rotary drier through a high-temperature air pipe. The barrel head of the rotary drier communicateswith the bottom of the spray tower through an air outlet pipeline of the rotary drier. The top of the spray tower communicates with the bottom of the air-cooled chiller unit through a cold air outletpipeline. The top of the air-cooled chiller unit communicates with the water source high-temperature heat pump through an air return pipe. The water source high-temperature heat pump, the rotary drier, the spray tower and the air-cooled chiller unit form a closed gas circulating channel. The energy saving effect is remarkable, and the mineral powder drying device is especially suitable for heat pump drying of ilmenite concentrates, pellets and other fine particle and powder materials.

Spray tower and method for processing VOCs by using spray tower

Abstract: The invention provides a spray tower and a method for processing VOCs by using the spray tower. The spray tower comprises a tower body, a packing layer, a defogging layer, a grating plate, a spray device, an air inlet and an air outlet, the defogging layer is located at the top of the tower, the packing layer is located in the tower body located below the defogging layer, the packing layer and thedefogging layer are correspondingly supported by the grating plate, the upper part of the packing layer is provided with the spray device, the air inlet is located in the tower body and below the packing layer, and the air outlet is located in the top of the defogging layer. The method comprises the steps that gas containing the VOCs is introduced into the spray tower through the air inlet, meanwhile an absorbent solution is sprayed to the packing layer by using the spray device, the gas penetrates through the packing layer, the absorption solution absorbs the VOCs and then is discharged, andafter removing the VOCs, the gas is discharged from the air outlet through the defogging layer. The provided method does not produce hazardous activated carbon waste, the cost is reduced, and the environment is protected.

Removal of Air Ammonia in a Spray Tower by Dilute Sulfuric Acid Solution using Operating Parameter Alteration

Abstract: Background and Objective: Workplace air quality is a very important factor in community health, which is measured using airborne contaminants evaluation and measurement. One of these airborne pollutants in industries is ammonia gas. Spray towers are important components of air pollution control. This study aimed to investigate the effects of dilute sulfuric acid solution on the efficiency of ammonia removal in a spray tower. Materials and Methods: This study evaluated the rate of ammonia removal from the air stream using a spray tower with laboratory criterion by altering the liquid pressure and nozzles, as well as the inlet density. The volume of the used airstream was 3737.82 l/min; moreover, one, two, and three 20micron diameter nozzles were used with the dilute sulfuric acid solution. The data were analyzed in SPSS software (version 21) through one-way ANOVA. Results: An increase in the number of nozzles and washing liquid pressure of the spray tower increased the ammonia removal efficiency and enhanced the input load of the system which reduced the elimination efficiency (P<0.05). Conclusion: An increase in the number of nozzles, the operating pressure of the washing liquid, and the density of the pollutant gas lead to a higher level of spraying tower efficiency in terms of eliminating the ammonia gas from

Oil refinery waste gas purification treatment device

Abstract: The invention discloses an oil refinery waste gas purification treatment device which structurally comprises an air inlet pipeline, a spray tower, a first pipeline, photolysis equipment, a second pipeline, a centrifuge, an exhaust pipe and a fan. The bottom of the spray tower communicates with the air inlet pipeline, and the top of the spray tower communicates with the photolysis equipment throughthe first pipeline. The photolysis equipment communicates with the centrifuge through the second pipeline. The top of the centrifuge is provided with the exhaust pipe, and the side face of the centrifuge is connected with the fan. The air inlet pipeline comprises a pipe body, a ball, a rotating ring, a protection structure, a gravity rod and an oil removing structure. The oil refinery waste gas purification treatment device has the beneficial effects that through cooperation between the protection structure and a spray head, dirt is formed on the surface of the protection structure and can becomprehensively dissolved during dirt cleaning; And when being not in use, the spray head is wrapped inside through the protection structure so that an outlet of the spray head can be protected frombeing blocked by oily components, the dirt in the pipeline can be cleaned up, and secondary pollution to entering air is prevented.