Two-stage compression heat pump seawater desalination device with combined action of freezing and evaporation

A joint action, two-stage compression technology, applied in seawater treatment, general water supply saving, heating water/sewage treatment, etc., can solve the problems of high cost of membrane processing, neglect of evaporator cooling capacity, large energy consumption, etc., and achieve reduction Energy consumption and the effect of increasing the speed of seawater desalination

Pending Publication Date: 2020-04-24
ZHEJIANG UNIV OF TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Distillation is mainly based on multi-stage flash evaporation and multi-effect flash evaporation, but it consumes a lot of energy and desalination costs are high
Reverse osmosis and electrodialysis membrane seawater desalination technologies also have outstanding problem

Method used

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  • Two-stage compression heat pump seawater desalination device with combined action of freezing and evaporation
  • Two-stage compression heat pump seawater desalination device with combined action of freezing and evaporation

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto.

[0023] Such as figure 1 , figure 2 As shown, this embodiment is a two-stage compression heat pump seawater desalination device with combined freezing and evaporation, including a refrigerant circulation system, and the refrigerant circulation system includes a first compressor 2, a second compressor 1, a second condenser 17, a Two throttle valves 16 , gas-liquid separator 15 , first throttle valve 9 and evaporator 3 . The outlet of the first compressor 2 is connected with the inlet of the second compressor 1, the outlet of the second compressor 1 is connected with the refrigerant inlet of the second condenser 17, and the refrigerant outlet of the second condenser 17 is connected with the second The inlet of the throttle valve 16 is connected, the outlet of the second throttle valve 16 is connected ...

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Abstract

The invention belongs to the technical field of seawater desalination, and concretely relates to a two-stage compression heat pump seawater desalination device with combined action of freezing and evaporation. A refrigerant circulating system comprises a first compressor, a first condenser, a first throttle valve, an evaporator, a second compressor, a second condenser, a second throttle valve, a gas-liquid separator and a third heat exchanger; a first seawater desalination system comprises a first seawater tank, a first water pump and an evaporator; and a second seawater desalination system comprises a second seawater tank, a second water pump, a first condenser, a second condenser, a vacuum pump, a second heat exchanger and a freshwater tank. Freshwater is prepared by adopting a two-stagecompression heat pump technology, and seawater is frozen on the evaporator side to form salt-free ice; seawater is heated on the condenser side to form salt-free water vapor, and the seawater is heated by the two condensers to easily reach the boiling point and be evaporated; and ice on the evaporator side can be melted through refrigerant circulation.

Description

technical field [0001] The invention belongs to the technical field of seawater desalination, and in particular relates to a two-stage compression heat pump seawater desalination device with combined freezing and evaporation functions. Background technique [0002] With the development of society and economy, as the necessary material for the development and survival of all organisms on the earth, the world's fresh water resources have become very scarce. Therefore, the rational use of fresh water and energy has become one of the difficulties faced by the world in the new century. Seawater desalination technology is undoubtedly one of the important ways to solve the freshwater crisis. [0003] The commonly used desalination methods include distillation and membrane technology. Distillation is mainly based on multi-stage flash evaporation and multi-effect flash evaporation, but it consumes a lot of energy and desalination costs are high. Reverse osmosis and electrodialysis ...

Claims

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Application Information

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IPC IPC(8): C02F1/04C02F1/16C02F103/08
CPCC02F1/04C02F1/16C02F2103/08Y02A20/124
Inventor 徐英杰李芬
Owner ZHEJIANG UNIV OF TECH
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