Method for recovering flue gas waste heat of coke oven

Abstract

The invention relates to a method for recovering flue gas waste heat of a coke oven. The method comprises the following steps of: machining a flue gas acquisition conveying channel and a flue gas output channel on an output flue of the coke oven; constructing a coke oven flue gas waste heat recovery pipeline which is communicated with the flue gas acquisition conveying channel and the flue gas output channel and is positioned between the flue gas acquisition conveying channel and the flue gas output channel, and installing a waste heat recovery system in the waste heat recovery pipeline; and regulating pressure in the waste heat recovery pipeline, performing heat energy conversion by using the waste heat recovery system, outputting heat energy and discharging coke oven flue gas from which the waste heat is recovered along the flue gas output channel. The method is mainly applied to the waste heat recovery of the flue gas of a newly-built or rebuilt coke oven system, and can be matched with the coke oven systems with various structures; and the method is a set of integral independent waste heat recovery system, an integral structure of the coke oven system is not changed, the flue gas waste heat of the coke oven system can be recovered efficiently, and the coke oven system can run stably, reliably and continuously. The method is small in investment and flexibly and conveniently applied, and meets the requirements of the waste heat recovery of the coke oven systems with the various structures, maintenance cost is low, and the integral structure is simple.

Description

technical field [0001] The invention relates to a method for recovering coke oven flue gas waste heat. Background technique [0002] The production of coke needs a lot of energy, but currently in the coke production process, only the flue gas after heating the coke oven with gas combustion can recover part of the sensible heat through heat storage bricks to make coke, and then pass through the flue It directly enters the chimney and is discharged into the atmosphere. The flue gas has high heat and high temperature, which not only pollutes the atmosphere, but also causes a great waste of energy. Therefore, the waste heat recovery of this energy not only has great economic value, but also reduces environmental pollution. actual value. [0003] However, due to the special requirements of the coke production process, that is, the ignition of the coke oven requires a lot of time and energy. Generally, after the coke oven is ignited, it will not cease fire and must continue to ru...

AI Technical Summary

Problems solved by technology

[0008] In short, whether for renovation projects or new projects, the current methods have problems such as poor practicability, poor installation, and difficult maintenance in the later period.

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