Ammonia water tank tail gas purification equipment

Abstract

The invention belongs to the technical field of coke oven gas purification, and discloses ammonia water tank tail gas purification equipment, which comprises a purification tower, a cooling assembly, a washing assembly and a recovery assembly, the purification tower comprises an inlet and an outlet, the inlet and the outlet are respectively arranged at two ends of the purification tower, the inlet is communicated with an ammonia water tank, and the outlet is communicated with a coke oven gas negative pressure system; ammonia water tank tail gas in the ammonia water tank can flow into the outlet through the inlet; the cooling assembly comprises a heat exchanger, and the heat exchanger is arranged in the purification tower and configured to cool tail gas of the ammonia water tank; the washing assembly comprises a spraying pipe, and the spraying pipe can spray ammonium sulfate mother liquor to wash tail gas of the ammonia water tank and generate pollution discharge liquid; the recovery assembly comprises a collecting tank, the collecting tank is arranged at the bottom of the purification tower, and the collecting tank is configured to collect sewage. According to the ammonia water tank tail gas purification equipment, ammonia water tank tail gas can be cooled, purified and collected, adverse effects of impurities in the ammonia water tank tail gas on a coal gas negative pressure system are avoided, and the labor intensity is prevented from being increased.

Description

technical field [0001] The invention relates to the technical field of coke oven gas purification, in particular to an ammonia water tank tail gas purification equipment. Background technique [0002] The drum cooling process of the coke oven gas purification system supporting the decoking oven is responsible for the initial cooling and transportation of coke oven gas, the separation of tar and ammonia water, and the delivery of circulating ammonia water to the coke oven. The drum cold tank area is equipped with mechanized ammonia water clarification tank, circulating ammonia water intermediate tank, accidental ammonia water tank, tar intermediate tank, residual ammonia water tank and other equipment. Among them, the mechanized ammonia water clarification tank is mainly used for the clarification and separation of tar and ammonia water. The separated tar Sent to the middle tank of tar, after separation, the ammonia water is sent to the top of the coke oven for circulating an...

AI Technical Summary

Problems solved by technology

[0003] However, in the existing tail gas centralized treatment device, the tail gas from the ammonia water tank directly enters the gas negative pressure system without washing and purification. The ammonia in the tail gas is easy to corrode the gas pipe, and the solid particles such as naphthalene residue and tar residue in the tail gas will block the tail gas collection. The exhaust gas collection effect will be affected, causing negative pressure in the ammonia water tank, and there is a risk of deflation. Frequent and regular flushing to remove the solid slag in the exhaust gas collection pipe will affect the continuous collection of exhaust gas and increase labor intensity.

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