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Energy recovery system and recovery method used in feeding section of acrylonitrile production process

A production process and energy recovery device technology, applied in the chemical industry, sustainable manufacturing/processing, hydrocarbon ammonia oxidation preparation, etc., can solve the problems of cold energy and pressure waste, achieve small energy loss and improve energy recovery and utilization rate Effect

Active Publication Date: 2016-08-24
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an energy recovery system used in the feeding section of the acrylonitrile production process, thereby overcoming the shortcomings of the prior art that cause the waste of cold energy and pressure energy of the liquid raw material working fluid

Method used

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  • Energy recovery system and recovery method used in feeding section of acrylonitrile production process
  • Energy recovery system and recovery method used in feeding section of acrylonitrile production process
  • Energy recovery system and recovery method used in feeding section of acrylonitrile production process

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Embodiment 1

[0054] In this embodiment, the liquid raw material working medium is liquid propylene, the circulating working medium is propane, and the circulating working medium is dry fluid. The reaction raw material liquid propylene is sent from the spherical tank 1 through the first working medium pump 2 to the condensing evaporator 3 for constant pressure vaporization and superheating. In this embodiment, the vaporization pressure in the condensing evaporator 3 is 1.3 MPa; the saturated gaseous state Propylene enters the raw material working fluid expander 4 to expand and recover pressure energy, and the two-phase fluid with a pressure of about 0.35 MPa from the raw material working fluid expander 4 enters the superheater 5, and the superheated propylene enters the reactor 6 to participate in the reaction. The liquid propane coming out of the condensing evaporator 3 enters the second working medium pump 7, and the liquid propane coming out of the second working medium pump 7 is divided ...

Embodiment 2

[0056] In this embodiment, the liquid raw material working medium is liquid ammonia, the circulating working medium is ammonia, and the circulating working medium is wet fluid. The reaction raw material liquid ammonia is sent from the spherical tank 1 through the first working medium pump 2 to the condensing evaporator 3 for constant pressure vaporization. In this embodiment, the vaporization pressure of the liquefied ammonia in the condensing evaporator 3 is 1.2 MPa; after vaporization The saturated ammonia gas enters the raw material working fluid expander 4 to expand and recover pressure energy, and the two-phase fluid with a pressure of about 0.3 MPa from the raw material working fluid expander 4 enters the superheater 5, and the superheated ammonia gas enters the reactor 6 to participate in the reaction. The liquid ammonia coming out of the condensing evaporator 3 enters the second working medium pump 7, and the liquid ammonia coming out of the second working medium pump 7...

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Abstract

The invention discloses an energy recovery system for a feed section of an acrylonitrile production process and a recovery method. The energy recovery system comprises a storage tank, a first working medium pump, a condensing evaporator, a raw material working medium expansion machine, a superheater, a reactor, a second working medium pump, an expansion valve, an evaporator, a generator, an ejector and a circulating working medium expansion machine, wherein the storage tank, the first working medium pump, the condensing evaporator, the raw material working medium expansion machine, the superheater and the reactor are sequentially connected; the liquid phase outlet of the condensing evaporator, the second working medium pump, the expansion valve, the evaporator and the ejection inlet of the ejector are sequentially connected; the second working medium pump, the generator, the ejector and the gas phase inlet of the condensing evaporator are sequentially connected; and the generator, the circulating working medium expansion machine and the gas phase inlet of the condensing evaporator are sequentially connected. The energy recovery system disclosed by the invention can be used for overcoming the defect of cold energy and pressure energy waste, which is caused in the feed section of the acrylonitrile production process, of a liquid working medium in the prior art.

Description

technical field [0001] The invention relates to the field of energy recovery and utilization in the process of producing acrylonitrile by propylene ammoxidation, in particular to an energy recovery system and recovery method used in the feeding section of the acrylonitrile production process. Background technique [0002] Acrylonitrile is an important chemical raw material and has broad application prospects in the fields of synthetic fibers, synthetic rubber, and plastics. [0003] The production methods of acrylonitrile include: chlorohydrin-sodium cyanide method, acetylene method, and propylene ammoxidation method. The propylene ammoxidation method has the advantages of cheap and easy-to-obtain raw materials, low production cost, and simple production process. At present, more than 95% of the acrylonitrile production in the world adopts the propylene ammoxidation method. [0004] At present, the domestic acrylonitrile production process adopts the propylene ammoxidation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C253/26C07C255/08
CPCY02P20/10Y02P20/50
Inventor 卢苇刘纪云陈汉杨林曹聪王颖刘进阳许浩徐昆
Owner GUANGXI UNIV