On-line cleaning method of coke oven gas pipeline

Abstract

The invention discloses a method for online cleaning a coke oven gas pipeline. The method comprises the steps that: a temporary ammonia water pipeline valve is arranged on a temporary ammonia water pipeline; a connection point is selected on the coke oven gas pipeline; the temporary ammonia water pipeline is connected onto the coke oven gas pipeline; the temporary ammonia water pipeline valve is switched on; ammonia water being 70-80 DEG C is injected into the coke oven gas pipeline by utilizing the temporary ammonia water pipeline; the on-line cleaning is performed on the coke oven gas pipeline by utilizing the ammonia water; the temporary ammonia water pipeline valve is switched off after the cleaning; the temporary ammonia water pipeline is taken down; the pipeline from which the connection point is selected is recovered. The method overcomes the defect that the effect is poor due to coke oven gas pipeline obstructions in steam cleaning, effectively solves the problems of coke oven gas pipeline clogging, poor circulation, gas resistance increment, transport difficulty and unstable gas purification system production, improves the working efficiency, and greatly reduces the steam consumption.

Description

technical field [0001] The invention relates to a cleaning technology, in particular to an online method for cleaning coke oven gas pipelines. Background technique [0002] During the transportation of coke oven gas in the coking plant, impurities such as tar, naphthalene, and coal powder will be entrained and attached to the inner wall of the coke oven gas pipeline, causing the pipeline to be silted up, the circulation channel to become smaller, and the resistance to increase, which seriously affects the coke oven gas. delivery. The current technology is to use steam heating and purging. But this technique has five flaws in its use: [0003] 1. The steam purging effect is poor. Especially in winter, when the temperature is low, the steam cannot clean the tar and naphthalene attached to the pipe wall; [0004] Second, steam purging is subject to many conditions. Because during the purging process, it will be limited by steam pressure, temperature, pipe aperture and atmo...

AI Technical Summary

Problems solved by technology

[0008] The technical problem solved by the present invention is to provide an online method for cleaning the coke oven gas pipeline, which overcomes the defect of poor steam cleaning effect on coke oven gas pipeline blockages, and effectively solves coke oven gas pipeline blockage, poor circulation, and gas resistance. Difficulties in increase, difficulty in transportation, and unstable production of the gas purification system

Images