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Double-effect two-stage compression heat pump seawater desalination device

A two-stage compression, heat pump technology, applied in seawater treatment, general water supply saving, heating water/sewage treatment, etc., can solve the problems of large heat exchanger, complex device structure, poor water quality, etc. The effect of increasing the freezing rate and increasing the speed

Pending Publication Date: 2020-04-24
ZHEJIANG UNIV OF TECH
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Problems solved by technology

Membrane treatment has high requirements for seawater pretreatment, otherwise the quality of the effluent is poor, and the water quality obtained by the thermal method is high, but the traditional thermal method consumes high energy, the heat exchanger is large, and the device structure is complicated

Method used

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  • Double-effect two-stage compression heat pump seawater desalination device

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Embodiment Construction

[0017] 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.

[0018] like figure 1 As shown, a double-effect two-stage compression heat pump seawater desalination device includes a refrigerant circulation system, and the refrigerant circulation system includes a first compressor 1, a second compressor 12, and a second condenser sequentially connected into a closed circuit through pipelines 11. The first throttle valve 5 and the evaporator 2, wherein the outlet of the first compressor 1 is also connected to the inlet of the second compressor 12, and the outlet of the second compressor 12 is connected to the refrigerant of the second condenser 11 The refrigerant outlet of the second condenser 11 is connected to the inlet of the first throttle valve 5, the outlet of the first throttle valve 5 is connected to the refrigerant inlet of the evaporator 2, and the refrig...

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Abstract

The invention belongs to the technical field of seawater desalination, and particularly relates to a double-effect two-stage compression heat pump seawater desalination device. 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 and a second heat exchanger; a firstseawater 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 and a second condenser. Fresh water is prepared by adopting a two-stage compression heat pump technology, and seawater is frozen on the evaporator side to form salt-free ice; seawater is heated and vaporized on the side of the second condenser to form salt-free water vapor, and seawater desalinated by the seawater is heated by the two condensers and more easily reaches a boiling point to be evaporated; the two-stage compression heat pump technology can effectively reduce energy consumption and increase the seawater desalination speed.

Description

technical field [0001] The invention belongs to the technical field of seawater desalination, and in particular relates to a double-effect two-stage compression heat pump seawater desalination device. Background technique [0002] The scarcity of fresh water resources has affected the development of social economy and the improvement of living standards. In order to alleviate the shortage of fresh water, governments at all levels are actively looking for effective ways to solve the problem of shortage of fresh water resources. Ocean water resources are inexhaustible and inexhaustible. If part of the seawater can be turned into fresh water, it will be one of the important ways to solve the water resource crisis. As a result, seawater desalination technology has emerged as the times require, effectively alleviating the crisis of water shortages. [0003] Traditional seawater desalination technologies mainly include membrane method and thermal method. Membrane methods mainly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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