exhaust gas system

Abstract

The invention provides a tail gas emission system which comprises a washing tower, a fan, a tail gas manifold, a washing oil circulating pump and a washing oil cooler. An inverted-U-shaped elbow is arranged on a tower incoming pipeline connecting the washing tower with the fan, an original straight pipe is changed into a non-straight pipe with an individual part bent, and the highest position of the inverted-U-shaped elbow is higher than horizontal height of the tower incoming pipeline, so that washing oil accumulated in the tower incoming pipeline is stopped from flowing towards the fan, the problem caused to normal running of the fan by the washing oil is avoided, potential safety hazards caused by burning of the washing oil are avoided, normal running of the tail gas emission system is guaranteed, and standard reaching rate of emitted tail gas is increased.

Description

technical field [0001] The invention relates to the technical field of tail gas discharge in the coking industry, in particular to a tail gas discharge system. Background technique [0002] All kinds of tail gas produced in the production process of the coking industry cannot be discharged directly. The tail gas must be absorbed and treated to meet the requirements of the national environmental protection discharge standard before it can be discharged. [0003] The tail gas scrubber is a commonly used tail gas absorption device in the coking industry. The top of the tower is sprayed with circulating washing oil to absorb the toxic gas generated by storage tanks, towers and other equipment, so as to reduce the odor in the production area and meet environmental protection requirements. The main supporting equipment includes exhaust fan, oil washing circulation pump, tower bottom washing oil cooler and related auxiliary pipelines. A certain amount of washing oil is stored in t...

AI Technical Summary

Problems solved by technology

[0004] During the operation of the tail gas cleaning tower, since the circulating oil is sprayed on the top of the tower, the tail gas enters the tower in the middle of the tail gas cleaning tower; if the tail gas contains a lot of water vapor, the water vapor in the tail gas will Condensation and volume reduction will cause the tail gas inlet pipe to become a slight negative pressure state, and the floating part of the circulating washing oil in the tail gas scrubber will be sucked into the tail gas inlet tower pipe; the circulating washing oil will gradually accumulate in the tail gas pipe and will flow along the The exhaust pipe enters the exhaust fan, causing the fan to run abnormally or even damaged. Due to the heat generated by the fan operation, the washing oil in the fan may also burn, posing a safety hazard, which seriously affects the normal operation of the exhaust emission system and reduces the compliance rate of the exhaust exhaust

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