A movable heating apparatus for regenerating the used desulfurizing activated carbon is composed of a feeding segment consisting feeding cabin and gas locking valve, a transition segment with regenerating gas pumping-in inlet, a heating-regenerating segment with heat exchanger, a stage-one cooling segment, a stage-two cooling segment with heat exchanger, and an gas-in and material-discharging segment. Its regenerating process is also disclosed.

Movable sulfurization active carbon heating regenerator and regeneration

PROBLEM TO BE SOLVED: To always maintain the harmful component removing capacity of a granular carbonaceous material in good condition by executing the dechlorination treatment for removing the chlorine component remaining in the granular carbonaceous material in the case that the granular carbonaceous material is regenerated by heating after capturing the harmful material and the dust in waste gas with the granular carbonaceous material forming a transfer layer SOLUTION: The waste gas containing hydrogen chloride and dioxins generated in an incinerator, etc, 2 is sent to a dust collector 6 through a gas line 4, and dust is separated by the dust collector 6 and taken out from a discharge pipe 8 And the waste gas is sent to an adsorption column 12 through a gas line 10, to execute a waste gas treating process Moreover, the carbonaceous material of the adsorption column 12 capturing the harmful material and the dust, etc, is sent to an elimination column 20 through a transfer route 18, to execute regenerating process In the regenerating process, the dechlorination treatment for removing the chlorine component, in which the desorption of the harmful material and the decomposition of the dioxins are executed and also the chlorides of an alkali metal and an alkaline earth metal contained in the carbonaceous material are removed or decomposed, is applied

Dry type waste gas treating method

The invention discloses a method for finely removing hydrogen sulfide from natural gas at a normal temperature. The method adopts the following technical scheme: the natural gas enters a fine desulfurizing tower loaded with activated-carbon fine desulfurizing agent after the processes of drying and gas-water separation, so that H2S in the gas is removed under the effect of the desulfurizing agent; the fine desulfurizing agent is filled in a two-layer or multi-layer manner; the total height-to-diameter ratio of a bed layer is 1.5 to 4.0, the temperature is between normal temperature and 150 DEG C, and the pressure is between normal pressure and 2.5MPa; and through the measurement of a sulfur meter, when the contents of H2S in the natural gas reach 5mg/Nm3 after desulfurization through the desulfurizing tower, the desulfurizing process is completed. The desulfurizing agent uses particles or formed activated carbon as carriers of an activated component (i.e. CuO), and the contents of CuOin the desulfurizing agent are 2Wt% to 9Wt%; and the radial crushing strength is larger than or equal to 60N/cm, the bulk density is 0.5kg/I to 0.7kg/I, the specific surface is larger than 140m2/g, and the specific pore volume is 0.4ml/g to 0.8ml/g. Copper-loaded activated carbon is adopted as the desulfurizing agent for desulfurization, so that the special surface structure of the activated-carbon material is utilized for H2S purification through adsorption and catalytic oxidation.

Method for finely removing hydrogen sulfide from natural gas at normal temperature

PURPOSE:To attain automatic focus control which is free from disturbance, by detecting only a signal level a high reflectance among those obtained with irradiation of a light spot and then using this detected signal to control the focus of the light beam. CONSTITUTION:A focal shift between an objective lens 7a and a disk 1 which is detected optically by an automatic focus optical system 10 is converted into an electric signal by a photodetector 18. A circuit 81 samples only the peak point of an output signal 11 of the detector 18, and an automatic focus control signal 14 is obtained in accordance with a signal obtained by holding the sampled peak point of the signal 11. The time constants of C and R of a wave detecting circuit 23 are set sufficiently larger than the period of a signal change due to an information pit and then set sufficiently small to a region needed for the control signal. As a result, the signal level is held for the time constant of C and R when the light beam is reflected from a metallic film. Thus it is possible to compensate the change of the control signal owing to the presence or absence of a recorded pit. This process improves the lead-in of a control system and a following system.

Automatic focus controlling system

Provided is a porous membrane that can be manufactured in uncomplicated steps, has high hydrophilicity and water permeability, and exhibits excellent anti-fouling properties when used in a membrane bioreactor method (MBR method). The porous membrane of the present invention is a porous membrane containing polymer (A) and polymer (B), wherein the polymer (A) is a membrane-forming polymer, the polymer (B) is a polymer having a unit (b1) represented by formula (1) and a unit (b2) based on hydroxyl group-containing (meth)acrylate, and the concentration (mass%) of the unit (b1) is equal to or higher than the concentration (mass%) of the unit (b2) in the porous membrane.

Porous membrane, membrane module, water treatment device, and method for manufacturing porous membrane

PURPOSE:To reduce the amount of inert gas used as well as prevent the deterioration of the performance of adsorbent used by a method in which the regeneration and activation of the adsorbent are concurrently performed by injecting an inert gas and water vapor into the regenerator. CONSTITUTION:For a regenerator 1, an inlet 3 through which used adsorbent is introduced is provided at the top, an outlet 4 through which gas is released is at the middle, and an outlet 5 through which regenerated adsorbent is discharged is at the bottom. A reaction region with an inert gas-inducting port 6 is formed in the section above the gas outlet 4, a water gas reaction region with a water vapor-inducting port 7 is formed is the section below the outlet 4, and an indirect cooler 23 is provided at the bottom. An adsorbent which adsorbed SOx present is flue gas from a duct 14 in an adsorber 2 is sent through the outlet 13, the first sieve 16, and the duct 18 into the regenerator 1, where the gas comes into contact concurrentwise with inert gas in the upper half region of the regenerator to remove SOx and also comes into contact countercurrentwise with water vapor in the lower half region for activation. The regenerated adsorbent is circulated through the cooler 23, the second sieve 26, and the duct 28 to the adsorber 2.

Regenerator for adsorbent in dry type flue gas desulfurization apparatus

PURPOSE:To reduce the cost of installation, make easier the operation of desulfurization, raise the rate of recovery of sulfur, and make better the regeneration of adsorbent used by a method in which the regeneration of the absorbent and the recovery of sulfur as a product are performed in one reactor and water vapor is blown into the reactor to prevent the occurrence of side reactions. CONSTITUTION:Flue gas 20 is sent from a flue gas inlet 3 to the first reactor 1, where the flue gas 20 is desulfurized by an adsorbent, e.g., coal, from an adsorbent inlet 4 and released as clean gas 21. The adsorbent with SOx is sent through an outlet 6, the first sieve 16, and a duct 18 into the second reactor 2, where part of carbon is burned by blowing an inert gas 24 and air 25 into the reactor to completely release adsorbed SOx and at the same time to form S by reducing SOx and carbon. Afterwards, water vapor 26 is blown into the reactor to lower the temperature of reaction, whereby preventing side reactions. The gas containing sulfur is sent through a duct 27 into a condenser to recover it in the form of liquid sulfur. The regenerated adsorbent is cooled, and then circulated through the second sieve 17 and a duct 19 into the first reactor 1, where coal 23 is supplied as a reducing agent.

Dry type flue-gas desulfurization apparatus

PURPOSE:To eliminate the need for fresh reducing agents and lower running costs by supplying the reducible-material-contg. gas exhausted from a sulfurous acid gas reducing and sulfur recovering device by coal type reducing agents to a denitrating device and utilizing the same as a reducing agent for a denitration process. CONSTITUTION:The stack gas from a generating source 1 is allowed to contact with the reducible gas formed in a sulfur recovering device 11 in the presence of catalysts in a denitrating device 3, after which it is desulfurized in a dry type desulfurizing device 4, thence it is released as clean gas 5 into the atmosphere. The adsorbent adsorbed SOX is fed to a regenerator 7 through a line 6, and is desorbed. It is next returned to the device 4 through a line 8. Desorbed SO2 is reduced to single S substance by coal 12 in the device 11. Reducing gases such as H2, CO and the like are contained in the stack gas of the device 1. After sulfur is recovered from this gas in the 1st sulfur condenser 14 and the 1st demister, the gas is elevated of temp. by a gas heater 20 and the unreacted SO2 and byproduced H2S are allowed to react in a Claus reactor 23. After the gas is removed of sulfur in the 2nd condenser 23 and the 2nd demister 28, the gas is conducted through a duct 29 and a heater 30 to the device 3.

Stack gas treating device

PURPOSE:To prevent the poisoning of a Clause catalyst by halogen as well as reduce the operation cost for pretreatment by mixing NH3 gas in the flue gas in order ?to remove halogen present in the flue gas as a pretreatment process. CONSTITUTION:NH3 gas 3 is mixed in a gas 1 containing high concenrations of H2S and SO2 in an ammonia mixer 2, where halogenated substances present in the gas are reacted with NH3 to form the halides of NH3. Then, the gas is brought into contact with liquid sulfur in a scrubber 4 to remove the halides of NH3 and dust, cleaned gas is directed into a Clause reactor 5, and sulfur formed is sent to a condenser through a duct 6 to recover it in the form of liquid sulfur. Dust mixed in the liquid sulfur in the scrubber 4 is removed by a sulfur filter 7 and then discharged through a discharge pipe 8 to the outside.

Torii Masahiro

Papers

Regenerator for adsorbent in dry type flue gas desulfurization apparatus

Dry type flue-gas desulfurization apparatus

Stack gas treating device

Recovery of sulfur in dry type flue gas desulfurization apparatus