Coke oven gas desulfurization alkali washing integrated tower

Abstract

The invention discloses a coke oven gas desulfurization / alkali washing integrated tower which comprises an alkali washing section (17) positioned on the upper part of a tower body (5) and a ammonia washing section (14) positioned on the lower part of the tower body, wherein the inside of the alkali washing section is sequentially provided with an alkali washing solution distributor (3) suspended on a support beam (2), an alkali washing filler (4) and a broken tower tray (6) from top to bottom; and the inside of the ammonia washing section is sequentially provided with a gas-liquid distributor (7), an ammonia washing solution distributor (8), an ammonia washing filler (9), a middle distributor (10) and an ammonia washing filler and coal gas distributor (11) from top to bottom. The integrated tower is organically composed of the novel alkali washing solution distributor, other distributors, filler bodies and various other tower internal parts, and can simultaneously perform ammonia washing and alkali solution desulfurization on the coal gas. The tower is simple and compact in structure and convenient for operation, installation and maintenance, can greatly enhance the desulfurization efficiency to 20mg / m<3> below, reduces the occupied area of the tower body, shortens the operation cycle, lowers the treatment cost, is beneficial to environmental protection, and obtains favorable economic benefit and social benefit.

Description

technical field [0001] The invention relates to coke oven gas purification treatment equipment in the metallurgical coking industry, in particular to a coke oven gas desulfurization alkali washing integrated tower. Background technique [0002] Coke oven gas is an important high-value gas fuel produced in coking production. It can be used not only for steel production, but also for urban residents. It can also be used as a raw material for the production of synthetic ammonia, methanol and other chemical products. However, coke oven gas contains more harmful substances such as hydrogen sulfide, which is toxic and corrosive to the human body and will cause serious pollution to the environment. Therefore, coke oven gas must be desulfurized. At present, the domestic coking industry generally adopts the wet desulfurization process using ammonia in the gas as the alkali source, and the hydrogen sulfide content in the gas after desulfurization can be controlled at 200mg / m 3 After...

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Problems solved by technology

There is also a method of adding a high-efficiency desulfurization catalyst to the alkaline desulfurization liquid to increase the desulfurization efficiency. Although the desulfurization efficiency has been improved, the effect is still significant, and the activity and regeneration of the desulfurization liquid are not high.

[0004] At present, there are not many examples of improving desulfurization efficiency by changing the structure of the desulfurization tower, especially in coke oven gas desulfurization devices that simultaneously perform ammonia desulfurization and alkali desulfurization in one tower.

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