A coke oven safety and environmental protection shutdown method

Abstract

A coke oven safety and environmental shutdown method, comprising the following steps: (1) On the negative pressure gas pipe before the shutdown coke oven enters the gas purification system, two pressure openings are blocked at intervals, so that the shutdown coke oven and gas purification The system is disconnected; (2). On the negative pressure gas pipe between the two blocks, a liquid discharge port is opened by using the pressure opening technology; (3). The non-spark cutting technology is used to cut the Part of the negative pressure gas pipe is cut off; (4) Weld the flange on the outside of the negative pressure gas pipe connected to the gas purification system and install a flange blind plate; (5) Inject inert gas into the gas collecting pipe for purging and maintaining pressure, Prevent the gas in the gas collecting pipe from flashing back, burning and exploding. The invention has good blocking effect, mature and reliable technology, and high safety in the construction process. It can stop the operation of a single coke oven under the condition of non-stop gas blower, without affecting the normal production of another coke oven, and can achieve Stop the furnace under 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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