System for recovering ammonium sulfate and recycling organic matters from evaporation concentrated solution of acrylonitrile dilute ammonium sulfate solution and application method thereof

A technology for evaporating concentrated liquid and ammonium sulfate, applied in ammonium sulfate and other directions, can solve the problems of high cost, high cost of flue gas desulfurization and denitrification, flue gas emission, etc., and achieve the effect of reducing adsorption and coating

Active Publication Date: 2019-10-15
青岛哈工资源环境技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problem of high energy consumption, high cost, large investment in equipment, large amount of flue gas emission, large investment in follow-up flue gas treatment equipment, and flue gas desulfurization and denitrification in the existing incineration method for treating the evaporated concentrated liquid of acrylonitrile dilute ammonium sulfate liquid. High cost, technical problems that affect the economic and environmental benefits of the enterprise, and provide a system and method for the recovery of ammonium sulfate in the evaporation concentrate of acrylonitrile dilute ammonium sulfate liquid and the resource utilization of organic matter

Method used

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  • System for recovering ammonium sulfate and recycling organic matters from evaporation concentrated solution of acrylonitrile dilute ammonium sulfate solution and application method thereof
  • System for recovering ammonium sulfate and recycling organic matters from evaporation concentrated solution of acrylonitrile dilute ammonium sulfate solution and application method thereof
  • System for recovering ammonium sulfate and recycling organic matters from evaporation concentrated solution of acrylonitrile dilute ammonium sulfate solution and application method thereof

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specific Embodiment approach 1

[0035] Specific implementation mode one: this implementation mode is a system for ammonium sulfate recovery and organic resource utilization in the evaporation concentrate of acrylonitrile dilute ammonium sulfate liquid, such as Figure 1-Figure 2 As shown, it is specifically composed of extractant storage tank 1, heat exchanger 2, first crystallizer 3, second crystallizer 4, first solid-liquid separation device 5, scrubber 6, drying device 7, modifier storage tank 8. Liquid-liquid mixer 9, pre-reactor 10, post-reactor 11, first condenser 12, gas absorption device 13, liquid-liquid separator 14, evaporator 15, product storage tank 16, water agent storage tank 17 , a rectifying tower 18, a second solid-liquid separation device 19, a second condenser 20, a third condenser 21 and a plurality of pipeline combinations;

[0036] The first crystallizer 3 is a cooling crystallizer; the second crystallizer 4 is a cooling crystallizer;

[0037] Described scrubber 6 has agitator;

[00...

specific Embodiment approach 2

[0044] Specific implementation mode two: the difference between this implementation mode and specific implementation mode one is: if figure 2 As shown, the outer wall of the second crystallizer 4 is a cylindrical structure, and a small cylinder 4-3 coaxial with the outer wall is arranged inside the cylinder, and the diameter of the small cylinder 4-3 is smaller than that of the second crystallizer 4 The diameter of cylinder wall, small cylinder 4-3 is fixed on the inner upper wall of the second crystallizer 4, and there is a gap between the bottom surface of small cylinder 4-3 and the inner bottom surface of the second crystallizer 4, small cylinder 4 The bottom surface of -3 is an open structure, and the liquid inlet 4-4 on the upper surface of the second crystallizer 4 is arranged on the top of the small cylinder 4-3. Others are the same as the first embodiment.

specific Embodiment approach 3

[0045]Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the first solid-liquid separation device 5 is a centrifugal device. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a system for recovering ammonium sulfate and recycling organic matters from evaporation concentrated solution of acrylonitrile dilute ammonium sulfate solution and an application method thereof, and relates to a system for treating an evaporation concentrated solution of an acrylonitrile dilute ammonium sulfate solution and an application method thereof. The invention aimsto solve the technical problems of high energy consumption, high cost, large investment, discharge of a large amount of generated flue gas, large investment of subsequent flue gas treatment equipmentand high flue gas desulfurization and denitrification cost in the existing incineration methods for treating the acrylonitrile dilute ammonium sulfate solution. The system achieves recovery of ammonium sulfate in the evaporation concentrated solution of the acrylonitrile dilute ammonium sulfate solution and preparation of the epoxy resin curing agent at the same time, the purity of the obtained solid ammonium sulfate can reach 99.9%, the solid ammonium sulfate can be used for agricultural fertilizers, and the obtained curing agent is used for epoxy resin curing. A product obtained after the curing agent and epoxy E-44 are cured has good thermal stability, the bending strength ranges from 50 MPa to 100 MPa, and the tensile strength ranges from 5 MPa to 50 MPa.

Description

technical field [0001] The invention relates to a system for treating the evaporated concentrated liquid of acrylonitrile dilute ammonium sulfate liquid and its application method. Background technique [0002] Acrylonitrile is one of the important monomers of the three major polymer synthetic materials (plastic, synthetic rubber and synthetic fiber), mainly used in the production of polyacrylonitrile fiber (acrylic fiber), ABS resin (acrylonitrile-butadiene-styrene copolymer) and synthetic rubber (acrylonitrile-butadiene copolymer), etc. At present, most countries in the world use the propylene-ammonia oxidation method developed by Sohio Company of the United States to produce acrylonitrile. In the process of rapid cooling from high temperature in this method, excessive ammonia gas alkaline conditions will cause side reactions such as product polymerization, and the degree of side reactions can be reduced by adding dilute sulfuric acid to neutralize the excess ammonia gas,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C1/24
CPCC01C1/24
Inventor 于朝生刘璐王凤鑫牛梦莹刘广民
Owner 青岛哈工资源环境技术有限公司
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