Direct recovery method and device applicable to industrial high-flow large-regulation-ratio flare gas

Abstract

The invention provides a direct recovery method and device applicable to industrial high-flow large-regulation-ratio flare gas. The flare gas sent from a flare gas pipe network is divided into two ways, wherein one way of flare gas can be conveyed to a gas cabinet, boosted through a compressor unit and then conveyed to a fuel gas pipe network; the other way of flare gas can pass through a liquid separation tank and arrive at a water sealed tank; when the pressure of the flare gas is higher than the height of a water seal of the water sealed tank, the flare gas enters a ground torch or an elevated torch to be incinerated; on a normal operating condition, the flare gas is conveyed to the fuel gas pipe network, and the ground torch and the elevated torch are put out; on a small accident condition, the flare gas is discharged into the ground torch to be incinerated, the gas cabinet operates normally, and the elevator torch is put out; on an emergent and large accident condition, the ground torch, the elevated torch and the gas cabinet conduct emergency treatment. Through the method and device, the disposal capacity is high, the flare gas with the discharge amount being 2000 tons per hour or more can be incinerated and treated through combined utilization of the ground torch and the elevated torch, and the requirement for safety discharge is met. The direct recovery method and device have the advantages that safety and reliability are achieved, and configuration is reasonable.

Description

technical field [0001] The invention relates to a method and device suitable for direct recovery of industrial large-flow discharge, large adjustment ratio, and high-calorific value flare gas. The method and device for directly recovering flare gas with high calorific value and regulating ratio can extinguish the overhead flare under normal working conditions and completely recycle the flare gas. Background technique [0002] At present, in the petrochemical industry and coal chemical industry, a large amount of combustible flare gas that cannot be directly used and must be discharged will be generated when the production equipment is on and off, in normal operation, and in accidents such as fire, power failure, and water cutoff. The composition of the gas is complex and the flow fluctuates in a large range. Usually, the elevated flare is directly burned at high altitude for treatment. However, the combustion efficiency of elevated flares is relatively low, and the incomple...

AI Technical Summary

Problems solved by technology

However, the combustion efficiency of the elevated torch is low, and the incompletely burned flue gas, high-temperature heat radiation, burning visible light, and noise during operation seriously pollute the environment, and the heat energy in the flue gas cannot be recycled, and a large amount of energy is wasted

[0003] Due to the complex composition of flare gas in modern chemical plants and the large flow fluctuation range, the existing flare gas recovery system is generally difficult to meet the performance requirements of large flow discharge, large adjustment ratio, and high calorific value of flare gas, often with low system capacity and operation adjustment ratio. Small, incomplete recovery of flare gas energy

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