A kind of ethanol synthesis reactor with heat exchange unit

Abstract

The invention relates to an ethanol synthesis reactor with a heat exchange unit. The ethanol synthesis reactor comprises a reactor body and the heat exchange unit, wherein the reactor body is connected with a gas mixture reactor inlet pipe and a crude ethanol reactor heat outlet pipe. The ethanol synthesis reactor is characterized in that the heat exchange unit is formed by a first heat exchanger, a second heat exchanger and a third heat exchanger which are connected in series through a pipeline in turn; the gas mixture reactor inlet pipe is connected with a cold source channel of the first heat exchanger; the crude ethanol reactor heat outlet pipe is connected with a heat source channel of the first heat exchanger; a raw material hydrogen third heat exchanger inlet pipe is a cold source inlet pipe of the third heat exchanger; an acetic acid and hydrogen mixture second heat exchanger inlet pipe is connected with a cold source inlet pipe of the second heat exchanger. According to the ethanol synthesis reactor with the heat exchange unit, the heat recovery utilization rate is high, the pipes and the devices are connected with each other in a direct welding mode, and accordingly the problems of the pipe thermal stress and the system flange sealing are solved so as to solve the problems of the process for preparing ethanol through acetic acid and hydrogenation.

Description

technical field [0001] The invention relates to the field of coal chemical industry, in particular to an ethanol synthesis reactor with a heat exchange unit. Background technique [0002] Heat exchangers are the most common and even essential equipment in chemical plants. According to its arrangement, it can be divided into horizontal heat exchanger and vertical heat exchanger, according to its use, it can be divided into condenser, cooler, heater (reboiler), heat exchanger, etc., and according to its structure, it can be divided into tube There are three types of shell heat exchangers, casing heat exchangers and plate heat exchangers. The former is divided into fixed tube plate type, U-shaped tube type, floating head type, kettle type heat exchanger, etc. Devices can be divided into single-tube and multi-tube. It can be said that there are various forms and types. [0003] At present, in the chemical production process, the conventional heat exchanger body and pipeline co...

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Problems solved by technology

[0006] The heat exchanger connection and heat recovery mentioned above can meet the design and production operation requirements in the conventional petrochemical production process, but there are three problems in the high-temperature, high-pressure, flammable and explosive production environment: The first is: The heat recovery efficiency is not good; the second is: the pipeline is connected by flange connection, and in the process of heating and cooling, leakage, combustion and explosion are prone to occur at the flange connection position; the third is: the production is in the process of heating and cooling Thermal deformation is easy to damage equipment and pipelines; the fourth is: the expansion joint used for buffering is easy to break

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