Heat recovery system of multi-effect evaporation system and processing method thereof

A multi-effect evaporation and treatment method technology, applied in the system field of heat recovery and utilization, can solve the problems of inability to effectively utilize low-temperature heat sources, large consumption of fresh steam, and large equipment investment, so as to reduce subsequent processing costs and reduce fresh steam. consumption, the effect of reducing fuel consumption

Pending Publication Date: 2018-07-27
SHANGHAI YOUHUA PROCESS INTEGRATED TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0024] Aiming at the problems of large equipment investment, high energy consumption, inability to effectively utilize low-temperature heat sources, and large consumption of fresh steam in the process of the existing energy-saving technology of the evaporation process, the present invention provides a method for multi-effect evaporation System and treatment method for heat recovery and utilization in the system

Method used

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  • Heat recovery system of multi-effect evaporation system and processing method thereof
  • Heat recovery system of multi-effect evaporation system and processing method thereof
  • Heat recovery system of multi-effect evaporation system and processing method thereof

Examples

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Embodiment 1

[0067] This embodiment provides a system for recovering and utilizing heat in a multi-effect evaporation system and its treatment method, such as figure 2 As shown, the system includes an evaporation device 1 connected in parallel with the final effect evaporation device 5 in the multi-effect evaporation system. The bottom of the evaporation device 1 is provided with a heating device 2, and the heat source of the heating device 2 is the temperature generated in a nearby device. It is a low-temperature heat source at 90°C to 130°C.

[0068] Among them, the multi-effect evaporation system is a four-effect evaporation system, and the liquid produced by the penultimate effect evaporator 6 of the four-effect evaporation system is divided into two paths, one path is sent to the final effect evaporator 5 in the four-effect evaporation system, and the other path is Send to evaporation device 1;

[0069] The heat supply device 2 is a reboiler. The liquid produced by the evaporator 1 ...

Embodiment 2

[0082] This embodiment provides a system for recovering and utilizing heat in a multi-effect evaporation system and its treatment method, such as image 3 As shown, the system includes an evaporation device 1 connected in series with the final effect evaporation device 5 in the multi-effect evaporation system. The bottom of the evaporation device 1 is provided with a heating device 2, and the heat source of the heating device 2 is the temperature generated in a nearby device. It is a low-temperature heat source at 90°C to 130°C.

[0083] Among them, the multi-effect evaporation system is a four-effect evaporation system, and the liquid produced by the final effect evaporation device 5 of the four-effect evaporation system is sent to the evaporation device 1;

[0084] The heat supply device 2 is a reboiler. The liquid produced by the evaporator 1 exchanges heat with the heat supply device 2 and returns to the evaporator 1. There is a Power transmission unit circulation pump; ...

Embodiment 3

[0090] This embodiment provides a system for recovering and utilizing heat in a multi-effect evaporation system and its treatment method. Its structure and method refer to Embodiment 1, the only difference is that the multi-effect evaporation system is a three-effect evaporation system.

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Abstract

The invention provides a heat recovery system of a multi-effect evaporation system and a processing method thereof. The heat recovery system of the multi-effect evaporation system comprises an evaporating device connected in parallel or/and in serial with an end effect evaporating device of the multi-effect evaporation system; the bottom of the evaporating device is provided with a heat supply device, and the heat source of the heat supply device is a low-temperature heat source at 90-130 DEG C. The heat recovery system of the multi-effect evaporation system makes full use of end-effect low-temperature hot trap of the multi-effect evaporation system to recover low-temperature heat of other technical devices, thereby reducing consumption of fresh steam of an initial-effect evaporator as well as the costs of aftertreatment of concentrated liquid waste.

Description

technical field [0001] The invention belongs to the technical field of evaporation equipment, and relates to a system for recovering and utilizing heat in a multi-effect evaporation system and a processing method thereof. Background technique [0002] Multi-effect evaporation (including two-effect, three-effect, four-effect or five-effect, etc.) is mostly used for the concentration of waste water and waste liquid. Heat source, the heat source of the first effect evaporation tower is mostly steam. [0003] In order to make full use of the heat of steam, the system installs vacuum equipment behind the cooler of the last effect evaporation tower. As the degree of vacuum increases, the operating pressure and temperature gradually decrease from the first effect evaporation tower to the last effect evaporation tower, thus The steam heat is utilized in steps. [0004] figure 1 It is a four-effect evaporation process of a petrochemical acrylonitrile wastewater. After 64.08t / h of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D1/26B01D1/28
CPCB01D1/26B01D1/2896Y02P70/10
Inventor 周斌孙虎良王海庄恒亚
Owner SHANGHAI YOUHUA PROCESS INTEGRATED TECH CO LTD
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