A kind of treatment method of coke oven flue gas treatment system

Abstract

A coke oven flue gas treatment system and a treatment method thereof. Provided are a coke oven flue gas treatment system and a treatment method thereof which reduce cost to the greatest extent and increase efficiency. The system of the present invention includes a coke oven flue gas inlet, an absorption tower, and a clean flue gas outlet. The coke oven flue gas inlet is arranged in the middle of the absorption tower, and the clean flue gas outlet is arranged at the top of the absorption tower. The absorption tower is also equipped with: an absorption spray section at the upper part of the coke oven flue gas inlet; The lower part of the inlet accommodates a slurry tank for absorbing liquid; the slurry tank is equipped with an absorption spray circuit, a ferrous solution replenishment circuit and an ammonia water replenishment circuit. The invention has the advantages of low investment, low energy consumption, low operating cost, mature and reliable process system, and a desulfurization efficiency of over 95%, meeting environmental protection requirements.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to a purification treatment system and treatment method for sulfur-containing and nitrate-containing flue gas, in particular to a desulfurization method for sulfur-containing and nitrate-containing flue gas discharged from the coke oven of a coking plant, specifically referring to ammonia low-temperature coke oven smoke Gas one-step desulfurization and denitrification system and its process. Background technique [0002] Sulfur dioxide is an important symbol to measure whether the atmosphere is polluted, and it is an important factor of air pollution, especially the "culprit" that causes acid rain pollution. The main sources of sulfur dioxide include burning sulfur-containing fuels, smelting sulfide ores, burning sulfur, manufacturing sulfuric acid and sulfurous acid, vulcanizing rubber, refrigeration, bleaching, disinfection, fumigation and insecticide, magnesium smelting, pet...

AI Technical Summary

Problems solved by technology

For the former, the main disadvantages are catalyst poisoning, ammonia leakage, and high investment and operating costs, which convert useful ammonia into useless N 2 , the process is not economical; for the latter, it is not suitable for flue gas denitrification in an atmosphere with high oxygen content

[0008] In order to solve the problem of flue gas denitrification, various solutions have been proposed at home and abroad. Among them, the patent CN101053747A proposes a scheme that uses a strong oxidant to oxidize NO first, and then uses ammonia water to absorb it. This scheme consumes a large amount of ozone, hydrogen peroxide, etc. Oxidizing agent, the process is very uneconomical

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