Pressure-maintaining and tail gas treating method and device for material tank of coking plant

Abstract

The invention discloses a pressure-maintaining and tail gas treating method and device for a material tank of a coking plant. The pressure-maintaining and tail gas treating method is characterized inthat tail gas and nitrogen gas in the material storage tank are compressed and stored to a high-pressure gas tank through a gas compressor for later use; tail gas and nitrogen gas do not need to treatand emit; a material slot tank is equipped with a pressure sensor; operation is performed by detecting gas pressure in the material storage tank in real time; when gas pressure is too low, a pipelinefor connecting the high-pressure gas storage tank to the material slot tank supplements pressure to the material slot tank, so that the material slot tank is prevented from pressure loss; when pressure in the material slot tank is too great, the gas compressor is started, the material storage tank and gas compressor pipelines are opened for compressing tail gas and nitrogen gas in the material storage tank into the high-pressure gas storage tank to release pressure of the material slot tank, so that tail gas and nitrogen gas generated in the material slot tank are intensively collected and used, and are compressed, stored or replenished to the material slot tank through a sealed circulating hoop; pressure-maintaining gas is the same as gas in the material storage tank, and other media arenot introduced, so that the whole process system and device is reasonable in configuration; and resources of the coking plant are utilized to the greatest extent in case of not increasing energy consumption or slightly increasing energy consumption, so that energy is saved and consumption is reduced.

Description

technical field [0001] The invention relates to a coking plant tail gas treatment technology, in particular to a coking plant tank pressure maintaining and tail gas treatment method and device. Background technique [0002] As we all know, the existing treatment technology used in the exhaust gas emission control of the materials in the tank of the coking plant needs to consume a lot of energy or generate a lot of hazardous waste and cause waste of resources, which adds a lot of cost burden to production. [0003] When the material in the tank of the coking plant is transferred, it is necessary to fill the tank with nitrogen to maintain the pressure. When inputting the material into the tank, the nitrogen and tail gas need to be discharged from the tank. The tail gas discharged from the tank needs to be treated according to environmental protection requirements. Nitrogen First of all, it will be directly wasted. At the same time, if the tail gas is directly discharged into t...

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Problems solved by technology

[0002] As we all know, the existing treatment technology adopted for the tail gas emission control of the materials in the tank of the coking plant needs to consume a lot of energy or generate a lot of hazardous waste and cause waste of resources, which adds a lot of cost burden to production

[0003] When the material in the tank of the coking plant is transferred, it is necessary to fill the tank with nitrogen to maintain the pressure. When inputting the material into the tank, the nitrogen and tail gas need to be discharged from the tank. The tail gas discharged from the tank needs to be treated according to environmental protection requirements. Nitrogen First of all, it will be directly wasted. At the same time, if the tail gas is directly discharged into the atmosphere, it will cause pollution. The tank materials in the coking plant will produce tail gas mainly composed of steam. The existing process tail gas treatment equipment generally includes condensation recovery, pickling, alkali washing, Activated carbon adsorption, RCO, RTO, etc., first, the process and equipment are relatively complicated, and some of them also produce a large amount of hazardous waste, etc., and the treatment cost is high. Secondly, the hazardous waste generated after its treatment has the risk of causing secondary pollution. RCO , RTO also has safety risks in the explosion-proof area

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