Brine-desalination method

A water desalination and raw water technology, applied in the field of salt water desalination, can solve the problem of high energy consumption

Inactive Publication Date: 2012-10-24
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The principle of distillation method is simple, but it consumes a lot of energy. The use of low-temperature evaporation can effectively reduce energy consumpt

Method used

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  • Brine-desalination method

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Example Embodiment

[0015] Example 1

[0016] a. The brine 1 is pretreated by mechanical impurity removal filtration, microfiltration, ultrafiltration, and security filter 2, and then enters the intermediate water tank 3, and then enters the reverse osmosis membrane treatment device 5 through the booster pump 4 for membrane filtration to obtain membrane treatment Clean water 14;

[0017] b. The purified water 14 after membrane treatment can be stored or put into use. The remaining concentrated brine is discharged out of water in two ways. One way enters the Venturi jet pump for high-speed injection, enters the intermediate water tank 3 for circulation treatment, and the other way passes through the check valve 7 (prevent pipe The internal fluid flows backwards), after being heated by the heat exchanger 15 and the heater 8 (the heating device 8 provides heat energy for the evaporation of water vapor, various forms of heating furnaces can be used, and the power plant with conditions can use waste he...

Example Embodiment

[0019] Example 2

[0020] The raw water processed in this embodiment is brackish water, which can be used in areas with long sunshine hours.

[0021] a. The brackish water 1 is pretreated by mechanical impurity removal filtration, microfiltration, ultrafiltration, and security filter 2 and then enters the intermediate water tank 3, and then enters the reverse osmosis membrane treatment device 5 through the booster pump 4 for membrane filtration, and obtains Membrane treatment of water purification 14;

[0022] b. The purified water 14 after membrane treatment is stored or put into use. The remaining concentrated brine is discharged out of water in two ways. One way enters the Venturi jet pump for high-speed injection, enters the intermediate tank 3 for circulation treatment, and the other way passes through the check valve 7 (to prevent the pipeline Fluid backflow), heated by the heat exchanger 15 and heater 8 (here, solar water heater), and then passed through the throttle valv...

Example Embodiment

[0024] Example 3

[0025] The raw water processed in this embodiment is seawater;

[0026] a. The seawater (1) is pretreated by mechanical impurity removal filtration, microfiltration, ultrafiltration, and security filter (2), then enters the intermediate water tank (3), and then enters the nanofiltration membrane treatment device (5) through the booster pump 4 ) Perform membrane filtration to obtain membrane treated purified water 14;

[0027] b. The purified water 14 after membrane treatment is put into use, and the remaining concentrated brine is discharged out of water in two ways. One way enters the Venturi jet pump for high-speed injection and enters the intermediate tank 3 for circulation treatment. The other way is through the check valve 7 to prevent the fluid in the pipeline from flowing back. After being heated by the heat exchanger 15 and the heater 8 (the heating device 8 provides heat energy for the evaporation of water vapor, various forms of heating furnaces can be u...

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Abstract

The invention aims to provide a brine-desalination method, which organically combines a distillation method and a membrane method for brine desalination, the high pressure of the strong brine of the membrane method is utilized to drive the negative pressure of a Venturi injection pump for lowering the subsequent evaporating pressure, so the evaporating process is carried out under the atmospheric pressure, the evaporating temperature can be effectively reduced, the evaporating energy consumption is saved, the concentration of the evaporating raffinate is high, and moreover, the heat of the evaporating raffinate is utilized for the subsequent crystallization; and the latent heat of the evaporated steam is effectively utilized to heat the brine to be evaporated, the heat energy is further recovered, and the energy consumption is lowered.

Description

technical field [0001] The invention relates to a method for desalination of brine. Background technique [0002] With the growth of the world's population, the massive development of water resources that can be directly used by humans, and the pollution of available water resources in the process of industrialization, the fresh water resources on the earth are decreasing and deteriorating, and the distribution of drinking water resources is also very uneven. In response to the scarcity of fresh water resources, various local water resources have been used to produce fresh water. The most widely used are desalination of seawater, desalination of brackish water and treatment of high-concentration brine. [0003] At present, the brine desalination methods mainly include distillation, freezing, ion exchange and membrane. The development of desalination technology mainly focuses on reducing energy consumption and cost. Distillation has multiple effect evaporation, multi-stage fl...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F1/04C02F1/44
CPCY02A20/124Y02A20/131
Inventor 文彬杨丹红任英杰
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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