System and method for recovering waste heat of coke-oven crude gas

Abstract

The invention relates to waste heat recovery of coke-oven crude gas, in particular to a system and a method for recovering waste heat of coke-oven crude gas, which mainly solves the technique problems of causing water leakage to a water jacket of a riser tube, causing tar slag to the inner wall of the riser tube and causing difficult opening and corrosion of a riser-tube cap by adopting a riser-tube vaporization cooler system to recover the waste heat of gas. The invention adopts a technical scheme that the system for recovering waste heat of coke-oven crude gas mainly comprises a high-end heat energy (800 to 500 DED C) absorption device, a low-end heat energy (500 to 280 DEG C) absorption device and a water replenishment system, wherein the high-end heat energy absorption device is connected with the low-end heat energy absorption device through a two-stage cooling input pipeline. The recovery system is connected with a reservoir through a water inlet pipe, is taken as a new-water replenishment channel of an external entering system, is connected with the high-end heat energy absorption device and the low-end heat energy absorption device for heat exchange via the reservoir through a water replenishment pipe respectively, and finally outputs steam generated in a steam drum through a steam output pipe. The method is mainly used to recover the waste heat of coke-oven crude gas.

Description

technical field [0001] The invention relates to waste heat recovery of coke oven raw gas, in particular to a coke oven waste heat recovery system and recovery method. Background technique [0002] In the current traditional coking production process, raw coal gas (temperature 850-950°C, flow rate 70,000m3 / h) is produced while the coal material is converted into coke through high-temperature dry distillation in the carbonization chamber. During the process of sending the gas to purification, the raw gas is cooled by spraying ammonia water in the bridge pipe so that the raw gas can enter the subsequent production process. Although the method of cooling raw gas by spraying ammonia water can quickly reduce the temperature of high-temperature raw gas, the process is relatively complicated, the energy consumption is large, and the operation and maintenance costs are high. During the exchange process, it is taken away by cooling ammonia water, and the cooled ammonia water is deamm...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a coke oven raw gas waste heat recovery system and recovery method, which mainly solves the water jacket leakage of the riser pipe water jacket, tar residue on the inner wall of the riser pipe, and riser pipe cover in the use of the riser pipe vaporization cooler system to recover the waste heat of the gas. Uncover difficult and corrosive technical issues

The invention is mainly aimed at solving the technical problem of waste heat recovery of raw gas by using heat pipe efficient conduction technology in the process of cooling raw gas in coke oven production technology

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