System for recovering waste heat of flue gas of coke oven

Abstract

The invention discloses a system for recovering waste heat of flue gas of a coke oven. The system comprises a waste heat boiler, a flue gas flowing line and a water heating circulation line, wherein the waste heat boiler comprises a boiler evaporator, a preheater and a boiler drum; the boiler evaporator and the preheater are arranged side by side; the boiler drum is arranged at the top part of the boiler evaporator; the flue gas flowing line consists of a flue gas inlet pipe and an exhaust pipe; the flue gas inlet pipe is connected with the boiler evaporator end of the waste heat boiler; the exhaust pipe is connected with the preheater end of the waste heat boiler; the water heating circulation line consists of a water inlet pipe, a preheating water pipe, down pipes, ascending pipes and a steam delivery pipe; the water inlet pipe and the preheating water pipe are communicated with the preheater and the boiler drum; the down pipes and the ascending pipes are communicated with the boiler evaporator and the boiler drum. According to the system, the high-temperature waste heat of the flue gas of the coke oven is fully utilized, and the waste heat boiler is introduced to recover the waste heat to generate steam; when the system is used for chemical production, not only is the energy saved but also pollution is reduced.

Description

technical field [0001] The invention relates to recovery of boiler waste heat, and more specifically relates to a coke oven flue gas waste heat recovery system. Background technique [0002] In the coal chemical industry, when producing coke, the coke oven is heated by coke oven gas, and the high-temperature flue gas generated after combustion has a dust content of 0.01-30.05q / m 3 , the temperature is 250 ℃ ~ 350 ℃, if it is directly discharged into the air, it will cause pollution to the surrounding environment on the one hand, and waste energy on the other. In today's increasingly tense energy environment, energy saving, emission reduction and environmental protection are becoming more and more important. Contents of the invention [0003] In order to solve the above-mentioned problems in the prior art, the present invention discloses a coke oven flue gas waste heat recovery system, which not only solves the pollution problem caused by coke oven discharge to the environ...

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Problems solved by technology

[0003] In order to solve the above-mentioned problems existing in the prior art, the present invention discloses a coke oven flue gas waste heat recovery system, which not only solves the pollution problem caused by coke oven discharge to the environment, but also makes full use of energy

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