Heat Exchanger Based on Turboexpander

Abstract

The invention provides a heat exchange device based on a turbo expander. The heat exchange device comprises a braking fan. The braking fan comprises an internal fan volute and an external fan wheel cap which is arranged around the fan volute, and further comprises an integrated type heat exchanger which is sleeved on the periphery of the fan wheel cap. The heat exchanger and the fan wheel cap are connected through a flange and are split. The flange comprises a lower connecting flange and an upper connecting flange, wherein the lower connecting flange is connected with the heat exchanger and the upper connecting flange is connected with the fan wheel cap. The turbo expander is simple and compact in structure.

Description

technical field [0001] The invention relates to a turbo expander, in particular to a heat exchange device based on a turbo expander. Background technique [0002] Most of the existing turboexpander brake fan structures adopt an open cycle, that is, the air is sucked from the atmosphere, and enters the brake fan casing through the silencer filter to brake the turbine rotor system, and the temperature of the gas after braking increases. , into the atmosphere through the exhaust pipe and exhaust muffler. Due to the use of natural cooling, the temperature of the fan casing is often as high as seventy or eighty degrees. In this case, due to the high temperature of the fan casing, it is easy to accelerate the aging of the equipment. At the same time, due to the large temperature difference between the expansion end and the brake end, the axial heat conduction is relatively serious, which will lead to the loss of turbine cooling capacity and reduce the turbine efficiency. Furthe...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of complex structure and low efficiency of the existing turbo expander heat exchange device, the present invention provides a heat exchange device based on a turbo expander, including a brake fan, and the brake fan includes an internal fan volute And the outer fan wheel cover arranged around the fan volute, which also includes an integrated heat exchanger sleeved on the periphery of the fan wheel cover, and the heat exchanger is flanged to the fan wheel cover and separated, The flange includes a lower connecting flange connected to the heat exchanger and an upper connecting flange connected to the fan wheel cover

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