Device and method for comprehensively utilizing hydrogen sulfide waste gas and sulfur dioxide waste gas

The invention discloses a tail gas treatment process for a biological aerobic fermentation tank and an equipment system thereof. The tail gas treatment process comprises the following steps: when the fermentation tank starts to work, an automatically-controlled switch valve I (3) is opened and the opening degree of a regulating valve (2) on an exhaust pipe is automatically regulated so as to maintain the pressure required by the fermentation tank; tail gas of the fermentation tank enters a gas-liquid separator (1), liquid is discharged back to the fermentation tank from a lower outlet of the separator, and gas still entrained with fine entrainment and viable bacteria is discharged into a tail gas scrubber (4) from an upper outlet of the separator; and tail gas entering the scrubber continuously contacts lye in an filler in a reverse direction so as to achieve mass transfer and gas scrubbing operation, the sprayed lye returns into a lye bath on the lower part of the scrubber, and clean gas is vented into atmosphere through a venting opening on the upper part of the scrubber. The tail gas treatment process has the advantages of automatic control, continuous operation, high mass transfer efficiency, safety and reliability; and the equipment system is made of stainless steel, and can meet requirements on sanitation, corrosion prevention and a high-temperature-resistant sterilization of biological aerobic fermentation production.

Tail gas treatment process for biological aerobic fermentation tank and equipment system thereof

The invention belongs to the field of preparation of titanium dioxide by a sulfuric acid method, and in particular relates to a method for treating acidolysis tail gas in a process of preparing titanium dioxide by using a sulfuric acid method. The technical problem to be solved by the invention is to provide the method for treating the acidolysis tail gas. According to the method, calcination tailgas is mixed and reacts with the acidolysis tail gas, and then sulfur dioxide in the calcination tail gas reacts with hydrogen sulfide in the acidolysis tail gas, so that sulfur in the tail gas is treated, sulfur is obtained, waste is treated by waste, and waste gas treatment cost is saved.

Method for treating acidolysis tail gas

The invention discloses corrosion-resistant dust removal equipment for washing sulfur trioxide. The corrosion-resistant dust removal equipment comprises a washing tank and a cooling tank, wherein thewashing tank comprises a gas-liquid mixing pipeline arranged at the top, a washing water purification tank arranged at the bottom, a venturi tube arranged between the gas-liquid mixing pipeline and the washing water purification tank; a stirring structure extending into the washing water purification tank is arranged at the bottom of the venturi, and a filtering plate frame structure is arranged in the washing water purification tank; the bottom of the washing water purification tank is provided with a liquid outlet which is connected with a sulfuric acid holding barrel through a liquid outletpipeline; and one side of the gas-liquid mixing pipeline is provided with a waste flue gas inlet pipe, the other side is provided with a washing water inlet pipe, and the washing water inlet pipe isconnected with the side wall of the washing water purification tank through a liquid inlet pipeline. The dust removal equipment provided by the invention has good corrosion resistance, not only improves the removal efficiency of dust in sulfur trioxide, but also has high purity of a sulfuric acid solution formed by recovery, can be further utilized, and reduces the washing cost.

Corrosion-resistant dust removal equipment for washing sulfur trioxide

A tail gas reutilization device for a biological fermentation tank is disclosed. The device includes the biological fermentation tank, a gas liquid separator, a tail gas treating tank and an exhaust fan. The biological fermentation tank is disposed at the bottom of the device main body. The lower end of the gas liquid separator is provided with a liquid discharging pipe. The upper end of the gas liquid separator is provided with a first connecting pipe. The left side of the tail gas treating tank is communicated with the first connecting pipe. The left side of the exhaust fan is connected to asixth connecting pipe through a second connecting pipe. The upper end of the exhaust fan is fixed to the top of the device main body through a fixing bar, and the lower end of the exhaust fan is connected to the biological fermentation tank through a third connecting pipe. The device can remove biological metabolites having peculiar smell and can reduce air pollution, and treated tail gas is fedinto the biological fermentation tank and reutilized. A drying oven, an activated carbon deodorizing tank and a deodorizing tank utilizing a chemical agent can be dismounted and replaced through threaded pipes so as to ensure the tail gas treating efficiency.

A tail gas reutilization device for a biological fermentation tank

The utility model relates to the field of environmental protection sewage treatment, in particular to a fermentation tail gas comprehensive utilization device. The fermentation tail gas comprehensive utilization device is characterized in that: the fermentation tail gas comprehensive utilization device comprises a fermentation tail gas buffer tank; one side of the fermentation tail gas buffer tank is connected with a cyclone separator; the cyclone separator is connected with a fermentation tank through a gas pipeline; the other side of the fermentation tail gas buffer tank is connected with a biochemical pool through the a gas connection pipeline; a gas distribution pipe is arranged on the bottom of the biochemical pool; water coming from the biochemical pool enters a settling pool; and the bottom of the settling pool is connected with the biochemical pool through a sludge return pipeline. The fermentation tail gas comprehensive utilization device has the beneficial effects that the existing fermentation tail gas after treatment is introduced to the aerobic biochemical pool for supplementing oxygen necessary for microorganism, and a check valve is additionally arranged on the gas connection pipeline for preventing backflow, therefore, the pollution problem caused by fermentation tail gas discharge is solved, and the power consumption of the aerobic biochemical pool is also reduced.

Fermentation tail gas comprehensive utilization device

The utility model relates to the field of sewage treatment and boiler smoke treatment of environmental protection, in particular to a device for comprehensively utilizing hydrogen sulfide waste gas and sulfur dioxide waste gas. The device for comprehensively utilizing hydrogen sulfide waste gas and sulfur dioxide waste gas is characterized in that: the device comprises a reaction tower; a first input end of the reaction tower is connected with a first output end of a first-level spray tower; a second input end of the reaction tower is connected with a clear water pool; the first output end of the reaction tower is connected with the first input end of a secondary-level spray tower; a second output end of the reaction tower is connected with an input end of a reaction solution storage pool; an output end of the reaction solution storage pool is connected with the input end of a sand filtering pool; the first output end of the secondary-level spray tower is connected with a chimney; and the second output end of the secondary-level spray tower is connected with a lime pool. The device for comprehensively utilizing hydrogen sulfide waste gas and sulfur dioxide waste gas has the beneficial effects that two levels of the spray towers and one level of the reaction tower are adopted, hydrogen sulfide and sulfur dioxide can be ensured to be completely reacted, and the discharge standard of smoke and the sulfur dioxide also can be ensured.

Ning Meng

Papers

Device and method for comprehensively utilizing hydrogen sulfide waste gas and sulfur dioxide waste gas

Fermentation tail gas comprehensive utilization device

Device for comprehensively utilizing hydrogen sulfide waste gas and sulfur dioxide waste gas