Coke oven raw gas heat continuous recovery system

Abstract

The invention relates to a coke oven raw gas heat continuous recovery system. The system comprises a high-temperature dust remover, a waste heat boiler, a low-temperature heat exchanger, a deaerator,a desalting water tank, a heating furnace, a temperature reducing and pressure reducing device, a steam superheater and a pressure reducing device. The waste heat boiler is used for efficiently recovering the heat of coke oven raw gas, multi-parameter steam is produced to be used by high-voltage power generation users and low-pressure steam users, internal steam of a process system is recycled, and the purpose of energy conservation is achieved; meanwhile, continuous operation of the waste heat recovery process system is guaranteed, and safe production of a coke oven is not influenced.

Description

technical field [0001] The invention relates to the technical field of waste heat utilization of coke oven raw gas, in particular to a heat recovery system for coke oven raw gas without interruption. Background technique [0002] The coking process is essentially an industrial process with carbon element flow as the main context, so solving the energy saving and consumption reduction of carbon element flow is of great significance for optimizing the coking process. The heat expenditure in the coke production process is mainly composed of the 950-1050 ℃ high-temperature waste heat brought out by the red coke from the coke oven, the 650-750 ℃ ​​medium-temperature waste heat brought out by the coke oven raw gas, and the 180-250 ℃ coke oven flue gas. ℃ low temperature waste heat and furnace surface heat loss consists of four parts. Among them, the 650-750°C medium-temperature waste heat brought out by coke oven raw gas accounts for 37% of the coke oven heat expenditure. Efficie...

AI Technical Summary

Problems solved by technology

Among them, the 650-750°C medium-temperature waste heat brought out by coke oven raw gas accounts for 37% of the coke oven heat expenditure. Efficient recovery of this part of heat is particularly important for secondary energy recovery and utilization in coking enterprises, but the composition of coke oven raw gas is extremely complex and extremely complex. Easy to condense and precipitate, adhere to the heat exchange device and cause graphitization effect

At present, rising pipe vaporization cooling devices and HYWHR technology are mainly used to recover the waste heat of coke oven raw gas, but the heat recovery efficiency is low, the product types are single, and water leakage from the rising pipe of the coke oven to the coking chamber of the coke oven is prone to occur, which affects the safe production of the coke oven

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