Low-temperature heat pipe evaporator for coke oven flue gas waste heat recovery system

Abstract

The invention discloses a low-temperature heat pipe evaporator for a coke oven flue gas waste heat recovery system. The evaporator comprises a heat exchange box body, evaporation heat pipes, an innercavity shell and a steam drum tank, wherein the inner cavity shell is installed in the heat exchange box body, an ascending steam chamber is arranged at the upper end of the heat exchange box body, the side face of the ascending steam chamber is connected with the steam drum tank through an ascending pipe, the lower end of the steam drum tank is connected with a descending pipeline through a circulating pipe, a blow-off pipeline is arranged on the side face of the lower end of the steam drum tank, the plurality of sets of evaporation heat pipes are installed on the inner cavity shell arrangedin the air inlet hole, and a second partition plate is installed on the position, below a first partition plate, of the inner cavity shell. According to the low-temperature heat pipe evaporator for the coke oven flue gas waste heat recovery system, inclined fins are evenly distributed on the outer sides of the heat pipes, the heat exchange area is effectively increased, heat transfer is enhanced,dust accumulation is reduced through the inclined fins, balance of the heat exchange efficiency is guaranteed, a heat exchange cavity is spaced through the partition plates arranged at intervals, thelength of a heat exchange channel is increased, and the heat exchange efficiency is improved.

Description

technical field [0001] The invention relates to the field of coke oven flue gas waste heat recovery, in particular to a low-temperature heat pipe evaporator for a coke oven flue gas waste heat recovery system. Background technique [0002] The coke oven flue gas is exchanged through the heat exchanger of the waste heat recovery system to generate saturated steam to heat the rich oil, and the flue gas after heat exchange is discharged from the chimney. The heat exchanger of the waste heat recovery system consists of a medium-temperature heat pipe steam generator, Low-temperature heat pipe steam generator, steam drum, steam-water circulation pipeline, water pump, etc. The steam-water circulation pipeline includes rising pipe and descending pipe. The low-temperature heat pipe steam generator is composed of a number of finned heat pipes and a box. The heat pipe is divided into upper and lower parts in the box and is isolated from each other into two closed spaces. There are even...

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Problems solved by technology

The low-temperature heat pipe steam generator is composed of a number of finned heat pipes and a box. The heat pipe is divided into upper and lower parts in the box and is isolated from each other into two closed spaces. There are evenly distributed fins on the outside of the heat pipe, so it is effective The heat exchange area is increased, the heat transfer is strengthened, and the heat exchange efficiency is improved, but the traditional square fins are easy to accumulate dust and affect the heat exchange, and the heat exchange cavity is penetrated inside, and the heat exchange channel is short, which affects the heat exchange

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