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Resourceful treatment device and treatment method for high-salinity wastewater

A technology of high-salt wastewater and treatment equipment, which is applied in the direction of water softening, multi-stage water treatment, water/sewage treatment, etc., can solve the problem of lack of effective technical means for defluoridation and salt separation, and achieve the realization of water resources and salt The effect of resource utilization, simple equipment and high degree of automation

Pending Publication Date: 2022-03-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the defluoridation of wastewater usually adopts the method of adding calcium to remove fluoride, and there is still a lack of effective technical means for the coordination of defluoridation and salt separation in the whole process

Method used

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  • Resourceful treatment device and treatment method for high-salinity wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] The main water quality characteristics of the coal chemical high-salt wastewater treated in this example are: pH=7.5, the concentration of total dissolved solids (TDS) is 10000 mg / L, and the Cl - The concentration is 4000mg / L, SO 4 2- The concentration is 2000mg / L, Mg 2+ The concentration is 30mg / L, Ca 2+ The concentration of 50mg / L, the concentration of dissolved silicon is 50mg / L, F - The concentration is 50mg / L, HCO 3 -The concentration of COD is 300mg / L, and the concentration of COD is 80mg / L.

[0089] process such as figure 1 As shown, the specific steps include:

[0090] Step 1, the high-salt wastewater enters the high-efficiency hard removal filter unit for treatment. First, add calcium chloride and magnesium chloride to the primary reaction tank, the concentration of which is 0.8g / L, the reaction time is 15min, the effluent overflows into the secondary reaction tank, add sodium carbonate and polyaluminium chloride, and add sodium carbonate The concentra...

Embodiment 2

[0106] The main water quality characteristics of the coal chemical high-salt wastewater treated in this example are: pH=8, the concentration of total dissolved solids (TDS) is 15000 mg / L, and the Cl - The concentration is 5500mg / L, SO 4 2- The concentration is 3000mg / L, Mg 2+ The concentration is 60mg / L, Ca 2+ The concentration of 100mg / L, the concentration of dissolved silicon is 100mg / L, F - The concentration is 60mg / L, HCO 3 - The concentration of COD is 400mg / L, and the concentration of COD is 100mg / L.

[0107] Specific steps include:

[0108] Step 1, the high-salt wastewater enters the high-efficiency hard removal filter unit for treatment. First, add calcium chloride and magnesium chloride to the primary reaction tank, the concentration of the addition is 1.1g / L and 1.5g / L, the reaction time is 20min, the effluent overflows into the secondary reaction tank, add sodium carbonate and polychloride Aluminum and sodium carbonate are added at a concentration of 1.5g / L,...

Embodiment 3

[0124] The main water quality characteristics of the coal chemical high-salt wastewater treated in this example are: pH=8.5, the concentration of total dissolved solids (TDS) is 20000 mg / L, and the Cl - The concentration is 7000mg / L, SO 4 2- The concentration is 4000mg / L, Mg 2+ The concentration is 90mg / L, Ca 2+ The concentration of 150mg / L, the concentration of dissolved silicon is 150mg / L, F - The concentration is 80mg / L, HCO 3 - The concentration of COD is 500mg / L, and the concentration of COD is 120mg / L.

[0125] Specific steps include:

[0126] Step 1, the high-salt wastewater enters the high-efficiency hard removal filter unit for treatment. First, calcium hydroxide and magnesium oxide are added to the primary reaction tank at concentrations of 1.5g / L and 2.0g / L respectively, and the reaction time is 30 minutes. The effluent overflows into the secondary reaction tank, and sodium carbonate and polymerized chlorine are added. Aluminum and sodium carbonate are added a...

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Abstract

The invention provides a resourceful treatment device for high-salinity wastewater. The resourceful treatment device comprises a hardness removal filtering unit, a catalytic ozonation unit, an ultrafiltration unit, a high-pressure reverse osmosis unit, a primary nanofiltration unit, a secondary nanofiltration unit, a roll type reverse osmosis unit, a first evaporative crystallization unit and a second evaporative crystallization unit. Compared with the prior art, the device and the process provided by the invention have the advantages of good effluent quality, high quality of recovered salts and good technical economy.

Description

technical field [0001] The invention relates to the technical field of high-salt wastewater treatment, in particular to a high-salt wastewater resource treatment device and treatment method. Background technique [0002] China's energy situation is rich in coal and poor in oil, and coal chemical technology plays a very important role in the regeneration and consumption of energy. Coal chemical industry is the process of converting coal into gas, liquid and solid raw materials through chemical processing, which mainly includes gasification, liquefaction, dry distillation of coal, and processing of tar. The application and development of coal chemical industry will inevitably produce a large amount of wastewater. This type of wastewater mainly contains a large amount of organic matter and inorganic salts, and the water quality is complex. Effective treatment of this type of wastewater is the key to the sustainable development of coal chemical enterprises. [0003] Some enterp...

Claims

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Application Information

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IPC IPC(8): C02F9/10C01D3/06C01D5/00
CPCC02F9/00C01D3/06C01D5/00C02F5/02C02F5/06C02F1/583C02F1/60C02F1/5245C02F1/001C02F1/78C02F1/725C02F1/444C02F1/441C02F1/442C02F1/04C02F2301/08C02F2301/046C02F2209/06C02F2209/08C02F2209/10C02F2209/19C02F2209/29C01P2006/80
Inventor 张新妙任鹏飞魏玉梅
Owner CHINA PETROLEUM & CHEM CORP
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