Device and method for treating waste gas of ammonium sulfate, desulfurization and salt extraction working sections of coking plant

Abstract

The invention discloses a device and method for treating waste gas of ammonium sulfate, desulfurization and salt extraction working sections of a coking plant. The device comprises closed equipment, wherein one side of the closed equipment is provided with non-closed equipment, all-weather fire-retardant breather valves, air regulating valves, fire arrestors, gas collection branch main pipes, liquid seal tanks, a gas collection main pipe I, a waste gas fan, a gas collection main pipe II, a prewashing tower, flushing layers, nozzles, demisters, prewashing tower production water, a prewashing tower circulating pump inlet pipe, prewashing tower circulating pumps, a prewashing tower drain pipe and a prewashing tower circulating pipe. The whole process and the device of the invention have a reasonable structure, reduce the waste gas collection amount of a waste gas discharge point, reduce the power of the waste gas fan and save electric energy. Meanwhile, coking plant resources are utilizedto the maximum extent under the condition of saving energy consumption, waste gas generated by production equipment such as grooves, tanks, and kettles of the sections of ammonium sulfate, desulfurization and salt extraction is collected and treated in a centralized manner, useful substances in the waste gas are recovered to the maximum extent while the waste gas is treated, and waste is turned into wealth while the waste gas reaches the emission standard.

Description

technical field [0001] The invention relates to the technical field of waste gas, in particular to a waste gas treatment device and a treatment method for ammonium sulfate, desulfurization and salt extraction sections of a coking plant. Background technique [0002] Various tanks, tanks, kettles and other equipment in the ammonium sulfate, desulfurization, and salt extraction sections of the coking plant will produce a large amount of waste gas mainly composed of ammonia, hydrogen sulfide, and hydrogen cyanide. The composition of the waste gas is relatively complex, and direct discharge into the atmosphere will cause pollution. , and also affect the occupational health of employees and the surrounding environment. At the same time, the discharge of each discharge point is uneven, sometimes large and sometimes small. The existing process is usually directly collected from the exhaust gas collection port to the exhaust gas supervisor and then exhausted by exhaust fans. As far ...

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Problems solved by technology

[0002] Various tanks, tanks, kettles and other equipment in the ammonium sulfate, desulfurization, and salt extraction sections of the coking plant will produce a large amount of waste gas mainly composed of ammonia, hydrogen sulfide, and hydrogen cyanide. The composition of the waste gas is relatively complex, and direct discharge into the atmosphere will cause pollution. , and also affect the occupational health of employees and the surrounding environment. At the same time, the discharge of each discharge point is uneven, sometimes large and sometimes small. The existing process is usually directly collected from the exhaust gas collection port to the exhaust gas supervisor and then exhausted by exhaust fans. As far as the treatment equipment is directly processed, it is difficult to control the amount of exhaust gas by this direct pumping method, and all the exhaust gas that has not escaped is pumped out for treatment, so it is unreasonable

This part of exhaust gas treatment equipment generally includes two parts: pickling and alkali washing. If there is no pre-washing, hydrogen sulfide in the exhaust gas will be oxidized to simple sulfur, desulfurization and decyanation catalyst phthalocyanine organometallic compounds and other solid substances and colored substances directly. Entering the pickling tower, the ammonium sulfate produced by the ammonia in the exhaust gas is impure and contains sulfur. Since the desulfurization and decyanation catalyst phthalocyanine organometallic compound is blue, the ammonium sulfate produced is also blue. After returning to the ammonium sulfate section, it causes It causes the mother liquor to turn blue, and the ammonium sulfate produced in the ammonium sulfate section turns light blue. Due to the poor quality, it cannot be sold, which will generate a large amount of hazardous waste, and the treatment cost is higher. Therefore, we propose the coking plant sulfur Waste gas treatment device and treatment method of ammonium, desulfurization, and salt extraction sections

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