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Equipment and process of utilizing MVR technology to recover waste heat

A waste heat recovery and waste heat technology, applied in the chemical industry, sustainable manufacturing/processing, climate sustainability, etc., to achieve the effects of simple process flow, low operating cost, and good economic benefits

Active Publication Date: 2019-01-04
SHENZHEN SUNEVAP TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] MVR (Mechanical Vapor Recompression, mechanical vapor recompression) evaporation system uses low-temperature and low-pressure steaming technology and clean energy (that is, electric energy) to generate steam to separate the moisture in the medium. With its outstanding energy-saving characteristics, it is widely used in Chemical, pharmaceutical, food, beverage, environmental protection and other industries, but there is no application of using MVR evaporation system to recover waste heat and reduce energy consumption

Method used

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  • Equipment and process of utilizing MVR technology to recover waste heat
  • Equipment and process of utilizing MVR technology to recover waste heat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a device for recovering waste heat using MVR technology, which is used to recover waste heat in the rectification process of epichlorohydrin, recover and treat the waste heat steam at the top of the rectification tower, and reuse it as a new heat source for purification in the rectification system of heating steam.

[0028] Please refer to figure 1 , the equipment for recovering waste heat using MVR technology includes a falling film heat exchanger 1, a falling film separator 2, and a secondary separator 3 connected in sequence through pipelines, and the falling film heat exchanger 1 is also connected with a phase separation Device 4, the phase separation device 4 is a phase separation tank, the secondary separator 3 is connected with a compressor 5 and a liquid accumulation device 6 through pipelines, and the liquid accumulation device 6 is a liquid accumulation storage tank.

[0029] Further, the falling film heat exchanger 1 is connected wit...

Embodiment 2

[0033] This embodiment provides a process for recovering waste heat using the equipment described in Example 1, the process is used to treat the mixed steam of epichlorohydrin and water with a flow rate of 15.25t / h, wherein the flow rate of epichlorohydrin is 6.25t / h The flow rate of t / h, water is 9t / h, and described technique comprises the steps:

[0034] S1. Recover the waste heat of the mixed steam of epichlorohydrin and water at the top of the rectification tower, and use the mixed steam of epichlorohydrin and water after rectification as a heat source to enter the falling film heat exchanger 1 through the pipeline for heat exchange, specifically Ground, the mixed steam enters the shell side of the falling film heat exchanger 1, and exchanges heat with the water in the tube side of the falling film heat exchanger 1, and the mixed steam of epichlorohydrin and water is condensed into epichlorohydrin and water after heat exchange The mixed liquid, the mixed liquid flows throu...

experiment example

[0039] The waste heat recovery process described in Example 2 was tested for the operation energy consumption in the process of rectifying epichlorohydrin, and the results are shown in Table 1.

[0040] Table 1

[0041]

[0042] The above results show that the waste heat recovery equipment and process using MVR technology described in Example 2 has the advantages of low energy consumption and cost, high output, simple process, less equipment, less construction investment, etc., and can reduce the annual cost by 10,437,084 Yuan.

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Abstract

The invention discloses equipment of utilizing an MVR technology to recover waste heat. The equipment comprises a falling film heat exchanger, a falling film separator and a secondary separator whichare connected in sequence, the falling film heat exchanger is connected with a phase separation device, and the secondary separator is connected with a compressor and a liquid collection device. The equipment utilizes the mechanical vapor recompression technology to recover the waste heat, the energy consumption is greatly reduced and is only 1 / 6 to 1 / 5 of that of a traditional rectification process, the thermal efficiency is high, dependence on traditional boiler equipment is reduced, pollutants are also reduced, no pollution is caused to the environment, energy is saved, and the environmentis protected. The invention also discloses a process adopting the equipment for recovering the waste heat, the process greatly reduces the energy consumption of a traditional rectification system by recovering the waste heat of waste steam on the top of a tower, the operation is simple, the process is controllable, the quality of products is stable and excellent, and remarkable economic benefits are obtained; meanwhile, the process has high automation degree, continuous operation can be conducted, the production efficiency is high, requirements for sustainable development are met, and the process can be widely used in actual industrial production processes.

Description

technical field [0001] The invention belongs to the technical field of waste heat recovery and utilization, and relates to a device and a process for recovering waste heat using MVR technology, in particular to a device and a process for recovering waste heat of epichlorohydrin and water mixed steam by using an MVR system. Background technique [0002] Epichlorohydrin is an important chemical raw material, which can be used in the production of epoxy resin, synthetic glycerin, chlorohydrin rubber and flame retardant. Epichlorohydrin can be prepared by oxidation of propylene oxide, using propylene oxide as a raw material, under the catalysis of trilithium orthophosphate, to selectively isomerize into propenol, propenol and chlorine to synthesize dichloropropanol, dichloropropane The alcohol is saponified into epichlorohydrin by calcium hydroxide, and the finished product is obtained by rectification. [0003] Rectification is a method that utilizes the different boiling poin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D301/32C07D303/08
CPCC07D301/32C07D303/08Y02P20/10Y02P20/50
Inventor 鲍燕娟张小江周齐
Owner SHENZHEN SUNEVAP TECH
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