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Propane dehydrogenation device waste heat recycling system and method

A propane dehydrogenation and system inlet technology, applied in chemical instruments and methods, indirect heat exchangers, hydrocarbons, etc., can solve the problems of high energy consumption and material consumption of propane, reduce consumption, save low-temperature heat sources, and have obvious advantages Effect

Active Publication Date: 2020-05-05
SINOPEC ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there are still problems of high energy consumption and material consumption in the production of propane dehydrogenation

Method used

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  • Propane dehydrogenation device waste heat recycling system and method

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Embodiment

[0047] The temperature of the reactor effluent of the propane dehydrogenation unit is 140°C, and the reactor effluent is sent to such as figure 1 The waste heat shown in the propane dehydrogenation unit is reused in the system. The hot water at 80°C comes from the circulating hot water storage tank (circulating medium storage tank K), is boosted by the hot water circulating pump (circulating medium circulating pump J), and is sent to the first circulating heat exchanger A and the second circulating heat exchanger respectively Device E is used to cool the output of the dehydrogenation reactor and the outlet process gas of the first section of the compressor to the maximum extent. While cooling the process medium, the temperature of the circulating hot water itself is heated to 110 ° C, and then sent to the reboiler I of the separation unit as a Heat source, after heating the process medium, the circulating hot water itself cools down to 80°C and then returns to the hot water st...

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Abstract

The invention relates to a propane dehydrogenation device waste heat recycling system and method. The system comprises a system inlet, a reactor effluent cooler, a reactor effluent compressor, a separation device and a circulating heat exchange device. According to the propane dehydrogenation device waste heat recycling system and method, because circulating media are used to obtain heat of wasteheat at an inlet and an outlet of a compressor first segment, and send the circulating media to a reboiler of the separation device for heat exchange, and a heat exchange loop of the circulating mediais formed, the waste heat which cannot be recycled by a device in the prior art can be recycled, a lot of low-temperature heat sources for reboiler are saved, and the energy consumption of the deviceis reduced while the consumption of public works is reduced; and with the propane dehydrogenation device waste heat recycling system and method, the position of the reboiler does not need to be changed, no influence is caused to the stability of operation of the device, the economic benefit of the propane dehydrogenation device can be improved, and the device and the method have the relatively obvious superiority.

Description

technical field [0001] The present disclosure relates to the field of propane dehydrogenation production devices, in particular to a system and method for reusing waste heat of a propane dehydrogenation device. Background technique [0002] In propane dehydrogenation production, the output of the propane dehydrogenation reactor is mainly hydrogen, methane, propylene and propane, which are compressed by the reactor effluent compressor (REC) and sent to the subsequent separation system. [0003] The reactor effluent compressor has two sections. The output of the dehydrogenation reactor is cooled to 42°C by the reactor effluent cooler first, and then enters the suction tank of the first stage of the compressor. The pressure is about 0.32MPaG, the outlet temperature of the first stage is about 131°C, and the output of the first stage is cooled to 42°C by the interstage cooler of the reactor effluent compressor, and then enters the second stage suction tank of the compressor, and...

Claims

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Application Information

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IPC IPC(8): F28D21/00C07C5/327C07C11/06
CPCC07C5/327F28D21/00F28D2021/0022C07C11/06Y02P20/50
Inventor 赵百仁白宇辰邵福喜邵璐彭勃
Owner SINOPEC ENG
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