Raw gas waste heat recycling device for ascending pipe of coke oven

Abstract

The invention discloses a raw gas waste heat recycling device for a coke oven ascension pipe, which comprises an ascension pipe body, a box body and an oil-gas separation tank, the ascension pipe body is combined by an outer pipe, a middle pipe and an inner pipe, the outer pipe comprises a protection pipe and a heat insulation layer, an oil guide heat exchange pipe is spirally mounted in the heat insulation layer, and an oil guide heat absorption pipe is spirally mounted in the middle pipe. The inner pipe and the outer pipe can be separated through the middle pipe, the oil guide heat absorption pipe and the oil guide heat exchange pipe only need to overcome circulation resistance of heat conduction oil, the risk of heat conduction oil leakage is reduced, the temperature of the heat conduction oil at an inlet of the ascending pipe body is automatically controlled through the oil temperature adjusting valve, and the temperature of the inner wall of the ascending pipe body and the temperature of a raw gas outlet can be effectively controlled; the temperature of the wall surface is maintained at 500 DEG C or above, tar steam in the raw gas is effectively prevented from coking, the problems of tar hanging, leakage and scaling in waste heat recovery of the raw gas of the ascending pipe are successfully solved, and efficient recovery and utilization of waste heat resources are realized.

Description

technical field [0001] The invention relates to the technical field of waste heat recovery, in particular to a waste heat recovery and utilization device for waste gas used in a coke oven riser. Background technique [0002] A coke oven refers to a horizontal chamber coke oven whose main purpose is to produce metallurgical coke and can recover coking chemical products. It consists of a furnace body and ancillary equipment. The regenerator and other parts are connected to the chimney through the flue. When the coke oven exhausts the smoke, it will be discharged through the rising pipe, and the waste gas produced by the coke oven contains a lot of waste heat, so the waste heat of the waste gas from the rising pipe of the coke oven is required. For recycling, we propose a waste heat recycling device for waste gas used in coke oven risers. [0003] In the process of realizing the present invention, the inventor found that at least the following problems have not been solved in ...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the shortcomings existing in the prior art, such as: the raw coal gas waste heat recovery and utilization device used for the coke oven riser cannot guarantee the stability of the heat absorption pressure of the water source, the risk of pipe burst and leakage is prone to occur, and the wall surface cannot be guaranteed. The temperature is maintained above 500°C, resulting in coking of tar vapor in the raw gas, and the problems of "tar hanging, leakage, and scaling" in the waste heat recovery of the rising pipe, which affect the recovery and utilization rate of waste heat resources, do not have the function of cleaning dust , and raw gas contains a lot of dust, a large amount of dust is adsorbed on the inner wall of the riser, not only easy to cause fire, but also increases the heat transfer resistance of the riser, reducing the heat transfer efficiency of the riser

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