System for treating coke oven exhausted contaminants

Abstract

The invention belongs to a system for treating coke oven exhausted contaminants. The system comprises a percolator, a water tank, a dehydration tank, a filter paste tank and a diaphragm pump, wherein a row of spraying nozzles which are used for spraying a hydrogen solution are arranged at the internal upper end of a flue communicating with a fume inlet, the fume inlet communicates with the lower end of the inner side of a fume scrubber, a fume outlet of the fume scrubber communicates with the internal upper end of a fume washer, the internal lower end of the fume washer communicates with the internal upper end of a gas washer, a gas outlet of the gas washer communicates with the dehydration tank through an 8-shaped cyclone pipe, the upper end of the dehydration tank serves as a fume exhaust outlet, an upper water outlet of the percolator communicates with an upper water inlet of the fume washer and a lower water inlet of the gas washer separately through water inlet pipes, and a lower water outlet of the percolator communicates with the internal upper end of the filter paste tank through the diaphragm pump. The system can be used for carrying out effective cooling, dedusting, denitration, desulfuration and deacidification treatment on harmful flue gases exhausted from a coke oven, and the operating cost is reduced; and the system has the advantages that the structure is simple, the performance is stable, the mounting and repairing are convenient, and the contaminant treatment effect is good.

Description

technical field [0001] The invention belongs to a coke oven discharge sewage treatment system. Background technique [0002] As we all know, the coke oven in the coking plant uses coal as raw material to produce coke, gas, ammonia solution and coal tar, but at the same time it also emits a large amount of high-temperature flue gas (the average temperature of the flue gas in the exhaust duct is 245 ° C), and the high-temperature flue gas contains dust, Toxic substances such as sulfur dioxide and nitrogen oxides seriously pollute the environment and damage human health. Therefore, the harmful flue gas discharged from the coke oven of the coking plant must be treated for cooling, dust removal, denitrification, desulfurization, and acid removal. [0003] At present, domestic wet flue gas desulfurizers are mainly spray type. During the dust removal, denitrification and desulfurization treatment, atomized water is sprayed from the spray device, and the smoke gas enters the lower ...

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Problems solved by technology

[0004] Although this technology has the function of desulfurization, it has the disadvantages of poor gas-liquid mass transfer and exchange effect, poor anti-fouling and clogging performance, and bulky equipment. Due to the wall flow effect, the distribution of the gas-liquid two-phase is uneven and easy to short-circuit, resulting in low desulfurization efficiency. It cannot solve the problem of unstable desulfurization efficiency caused by unstable flue gas discharge and pressure changes in the desulfurization tower. Although these technologies have been improved in recent years, they have not broken away from the original technical principles, so there has been no major breakthrough in technology

[0005] Although there are many desulfurization forms abroad, there are problems that they are not fully adapted to the national conditions of my country's high-dust and high-sulfur coal combustion, and they cannot solve the problems of unstable flue gas emissions and unstable treatment efficiency.

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