Safe and environment-friendly coke oven shutdown method

Abstract

A safe and environment-friendly coke oven shutdown method comprises the following steps that (1) two openings with pressure are blocked and broken at intervals on a negative-pressure gas pipe before ashutdown coke oven enters a gas purification system, so that the shutdown coke oven is disconnected from the gas purification system; (2) a liquid outlet is arranged in the negative-pressure gas pipebetween the two blockage parts by adopting a pressure opening technology; (3) a sparkless cutting technology is adopted to cut off the negative pressure gas pipe part between the two blocked parts; (4) a flange is welded on the outer side of the negative-pressure gas pipe connected with the gas purification system, and a flange blind plate is mounted; and (5) inert gas is introduced into a gas collecting pipe for purging and pressure maintaining, and tempering combustion explosion of coal gas in the gas collecting pipe is prevented. The method is good in blocking and breaking effect, mature and reliable in technology and high in safety in the construction process, a single coke oven can be stopped running under the condition that a gas blower is not stopped, normal production of the othercoke oven is not affected, and the coke oven can be stopped on the premise of safety.

Description

technical field [0001] The invention relates to the technical field of coke oven production, and more specifically refers to a coke oven safety and environmental shutdown method. Background technique [0002] At present, most domestic coking plants use two coke ovens as a group for production, and the two coke ovens share a set of gas blower and gas purification system. When one of the coke ovens needs to be shut down or shut down for renovation, it is necessary to safely disconnect the raw gas pipeline of the coke oven from the gas purification system. [0003] At present, the traditional practice in the industry is as follows: 1. Stop using the gas blower to ignite and disperse all the raw gas in the two coke ovens; 2. Stop production of the gas purification system and coke oven gas users; 3. Wait until the pressure in the gas pipe drops to When a certain value is reached, a blind plate is carried out on the raw gas pipeline, so that the coke oven in production is disconn...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a coke oven safety and environmental shutdown method to overcome the need to make the raw gas of the two coke ovens when one of the two coke ovens of the existing shared gas blower and gas purification system is shut down or shut down for renovation. Ignite and disperse, causing waste of resources and polluting the environment, and the gas purification system and coke oven gas users must interrupt production, which has a great impact on the production of the entire iron and steel complex, etc.

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