Hypersalinity mine water desalting device and desalting method

A high salinity and desalination device technology, applied in chemical instruments and methods, general water supply saving, mining wastewater treatment, etc., can solve problems such as increased investment and treatment costs, membrane fouling and clogging, high salt content in concentrated water, etc., to achieve Effect of reducing membrane clogging and prolonging membrane life

Pending Publication Date: 2021-11-30
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, if you want to increase the desalination rate, you need to increase the number of reverse osmosis unit stages, but increasing the desalination rate by simply increasing the number of stages will increase the salt content of the concentrated water, making the influent concentration of the reverse osmosis mem

Method used

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  • Hypersalinity mine water desalting device and desalting method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 1

[0032] like figure 1 As shown, a high salinity mine water desalination device, the desalination device comprises a first reverse osmosis membrane unit, a second reverse osmosis membrane unit, a third reverse osmosis membrane unit and a nanofiltration membrane unit;

[0033] The water inlet of the first reverse osmosis membrane unit is connected to high salinity mine water, the water production port of the first reverse osmosis membrane unit is connected to the water inlet of the second reverse osmosis membrane unit, and the concentrated water inlet of the first reverse osmosis membrane unit is connected to the water inlet of the second reverse osmosis membrane unit. The water inlet connection of the nanofiltration membrane unit;

[0034] The concentrated water inlet of the second reverse osmosis membrane unit is connected to the water inlet of the third reverse osmosis membrane unit, and the water produced by the second reverse osmosis membrane unit is reus...

Example Embodiment

[0037] Example 2

[0038] High salinity mine water (a class of mine water produced during coal mining, salinity (total inorganic salt content) greater than 1000mg / L) after pretreatment (decarburization and activated carbon), enters the membrane desalination system. The wastewater of this system first enters the first reverse osmosis membrane unit through the high-pressure pump, and the recovery rate is controlled at 65% to 70%; the concentrated water of the first reverse osmosis membrane unit enters the first nanofiltration membrane unit through the circulating pump, and the produced water enters the third Reverse osmosis membrane unit; the recovery rate of the first nanofiltration membrane unit is controlled at 70% to 80%; the concentrated water of the first nanofiltration membrane unit is discharged and collected, and the produced water enters the second reverse osmosis membrane unit; the second reverse osmosis membrane unit The recovery rate of the second reverse osmosis me...

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Abstract

The invention belongs to the technical field of wastewater treatment, and particularly relates to a hypersalinity mine water desalting device and a desalting method. In the desalting device, a water inlet of a first reverse osmosis membrane unit is communicated with high-salinity mine water, and a water producing port of the first reverse osmosis membrane unit is connected with a water inlet of a second reverse osmosis membrane unit; a concentrated water port of the first reverse osmosis membrane unit is connected with a water inlet of a nanofiltration membrane unit; a concentrated water port of the second reverse osmosis membrane unit is connected with a water inlet of a third reverse osmosis membrane unit, and produced water of the second reverse osmosis membrane unit is recycled after being qualified; a water producing port of the nanofiltration membrane unit is connected with a water inlet of the third reverse osmosis membrane unit, and concentrated water of the nanofiltration membrane unit is discharged and collected; a water producing port of the third reverse osmosis membrane unit is connected with the water inlet of the second reverse osmosis membrane unit, and concentrated water of the third reverse osmosis membrane unit is discharged and collected. According to the invention, the hypersalinity mine water is desalted so that the effluent can be recycled, the utilization of water resources is improved, and the environmental protection benefit is increased.

Description

technical field [0001] The invention belongs to the technical field of sewage and wastewater treatment, in particular to a high-salinity mine water desalination device and a desalination method. Background technique [0002] High salinity mine water - a type of mine water produced in the coal mining process, the salinity (total content of inorganic salts) is greater than 1000mg / L, and the hardness is relatively high. Salinity mainly comes from K + , Ca 2+ , Na + ,Mg 2+ , Cl - , SO 4 2- Plasma, there may also be some organic pollutants. [0003] Principle of ultrafiltration—Ultrafiltration is one of the membrane separation technologies driven by pressure. It aims at separating macromolecules and small molecules. The membrane pore size is between 20-1000A°. [0004] The principle of reverse osmosis—reverse osmosis, also known as reverse osmosis, is a membrane separation operation that uses pressure difference as the driving force to separate the solvent from the soluti...

Claims

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Application Information

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IPC IPC(8): C02F1/44C02F103/10
CPCC02F1/441C02F1/442C02F2103/10Y02A20/131
Inventor 杨小明郑曦刘峰彪刘艳丽
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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