Washing system and method for tail gas of blower cooling tank area

Abstract

The invention relates to the technical field of coking tail gas treatment, in particular to a washing system and method for tail gas of a blower cooling tank area. The system comprises a water washingtower, an acid washing tower, an alkaline washing tower, an activated carbon adsorption tower, a fan and a tail gas pipeline, wherein the water washing tower, the acid washing tower, the alkaline washing tower and the activated carbon adsorption tower are connected in series through pipelines and then connected with the tail gas pipeline through a first connecting pipe, and the fan is mounted onthe first connecting pipe; and the tail gas pipeline comprises a main tail gas pipe and first to sixth branch tail gas pipes, the first branch tail gas pipe is connected with a mechanical ammonia water clarification tank and a tar separator, the second branch tail gas pipe is connected with a residual ammonia water tank, the third branch tail gas pipe is connected with a tar intermediate tank, a super centrifuge and an air floatation tar remover, the fourth branch tail gas pipe is connected with a circulating ammonia water tank, the fifth branch tail gas pipe is connected with a tar storage tank, and the sixth branch tail gas pipe is connected with a blower cooling underground tank and a blower water seal tank. According to the invention, the process requirements of a drum condensation tank area are met, and the purpose of zero emission of tail gas in the tank area of a blower cooling procedure is achieved.

Description

technical field [0001] The invention relates to the technical field of coking tail gas treatment, in particular to a tail gas washing system and method in a drum cooling tank area. Background technique [0002] The blast condensation process in the recovery operation area of ​​the coking plant is mainly responsible for cleaning and cooling gas, gas transportation, establishing the balance of ammonia water with coking and producing crude tar. Due to the lack of an effective exhaust gas recovery system in the mechanized ammonia water clarification tank, circulating ammonia water tank, and residual ammonia water tank, more than 25 oil tanks in the process, the exhaust gas of the oil tank release pipe is discharged directly, which seriously threatens the occupational health of the employees and is difficult to meet the requirements of the current environmental protection situation. [0003] At present, the tail gas of the drum cooling process is generally recovered to the negati...

AI Technical Summary

Problems solved by technology

More than 25 oil tanks, including mechanized ammonia water clarification tanks, circulating ammonia water tanks, and residual ammonia water tanks, lack an effective exhaust gas recovery system, and the exhaust gas from the oil tank release pipe is directly discharged, which seriously threatens the occupational health of employees and is difficult to meet the requirements of the current environmental protection situation.

[0003] At present, the tail gas of the drum cooling process is generally recovered to the negative pressure gas pipeline of this process. In order to meet the operation requirements such as oil tank pouring, it is inevitable to mix air in the tail gas of the tank area. pipes, only by washing

In addition, the selection of exhaust gas cleaning liquid is very important. On the one hand, the recyclability of the cleaning liquid must be considered, and on the other hand, the cleaning effect must be considered, which greatly increases the difficulty of exhaust gas recovery.

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