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Resourceful treatment method and treatment system for desulfuration wastewater

A treatment method and desulfurization wastewater technology, which are applied in the fields of energy wastewater treatment, multi-stage water treatment, water/sewage treatment, etc. effect of value

Inactive Publication Date: 2017-02-22
DATANG INT CHEM TECH RESINST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This invention also has the problems of large dosage of chemicals, large amount of strong alkaline sludge, low sludge value, difficult comprehensive utilization, and high treatment cost.

Method used

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  • Resourceful treatment method and treatment system for desulfuration wastewater
  • Resourceful treatment method and treatment system for desulfuration wastewater
  • Resourceful treatment method and treatment system for desulfuration wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] This embodiment is used to illustrate the treatment of desulfurization wastewater generated in the process of flue gas SCR denitrification and wet desulfurization in thermal power generation enterprises according to the desulfurization wastewater resource treatment method and its treatment system of the present invention.

[0114] specifically, figure 2 A process flow diagram of one embodiment of the treatment method of the present invention is shown. The treatment method is implemented through a desulfurization wastewater resource treatment system. The treatment system includes a pH adjustment unit, an organic sulfur precipitation unit, a phosphate precipitation unit, a coagulation precipitation unit, a filtration unit, an ion exchange unit, a membrane separation unit, a first reverse osmosis unit, a first evaporation unit, and a first crystallization unit , the first crystalline salt separation unit, the second reverse osmosis unit, the second evaporation unit, the ...

Embodiment 2

[0186] This example is used to illustrate the treatment of desulfurization wastewater generated in the process of SCR denitrification and wet desulfurization of flue gas in self-owned power plants of coal chemical enterprises according to the desulfurization wastewater resource treatment method and its treatment system of the present invention.

[0187] specifically, image 3 A process flow diagram of one embodiment of the treatment method of the present invention is shown. The treatment method is implemented through a desulfurization wastewater resource treatment system. The treatment system includes pH adjustment-coagulation precipitation unit, phosphate precipitation unit, coagulation precipitation unit, acidification unit, ion exchange unit, membrane separation unit, first electrodialysis unit, first evaporation unit, first crystallization unit, A first crystallization salt separation unit, a second electrodialysis unit, a second evaporation unit, a second crystallization...

Embodiment 3

[0251] This embodiment is used to illustrate the treatment of desulfurization wastewater generated in the process of wet desulfurization of flue gas in coal-fired heat supply enterprises according to the resource-based treatment method of desulfurization wastewater and its treatment system of the present invention.

[0252] Figure 4 A process flow diagram of one embodiment of the treatment method of the present invention is shown. The treatment method is implemented through a desulfurization wastewater resource treatment system. The treatment system includes a pH adjustment-coagulation unit, a dissolved air flotation unit, a phosphate precipitation unit, a coagulation precipitation unit, an acidification unit, a membrane separation unit, a first electrodialysis unit, a first evaporation unit, and a first crystallization unit , a first crystallization salt separation unit, a second electrodialysis unit, a second evaporation unit, a second crystallization unit and a second cry...

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Abstract

The invention provides a resourceful treatment method for desulfuration wastewater. The resourceful treatment method comprises the following steps of (1), carrying out pretreatment on the desulfuration wastewater; (2), carrying out phosphate precipitation treatment on yielding water subjected to the pretreatment; (3), carrying out softening treatment on phosphate precipitated yielding water; (4), carrying out membrane separation treatment on softened yielding water, so as to obtain membrane separated produced water which is rich in monovalent ions and membrane separated thick water which is rich in bivalent and / or multivalent ions; (5), carrying out first advanced concentration treatment on the membrane separated produced water, so as to obtain first advanced concentrated produced water and first advanced concentrated thick water; (6), carrying out first evaporation and crystallization treatment on the first advanced concentrated thick water, so as to obtain a low-valent salt and evaporated liquor condensate; (7), carrying out second advanced concentration treatment on the membrane separated thick water, so as to obtain second advanced concentrated produced water and second advanced concentrated thick water; (8), carrying out second evaporation and crystallization treatment on the second advanced concentrated thick water, so as to obtain a high-valent salt and evaporated liquor condensate. The invention also provides a treatment system for implementing the method.

Description

technical field [0001] The invention relates to the technical field of sewage / wastewater treatment, in particular to a method for resourceful treatment of desulfurized wastewater and a system for resourceful treatment of desulfurized wastewater used in the treatment method. Background technique [0002] With the rapid development of the national economy, the pressure on resources and the environment is increasing, especially the shortage of fresh water resources. In order to improve the utilization efficiency of water resources and reduce the impact of sewage / wastewater discharge on the ecological environment, various industries in society have adopted various measures to carry out comprehensive utilization of sewage / wastewater resources. [0003] Thermal power generation enterprises, heat supply enterprises and self-owned power plants of various enterprises, after comprehensive utilization of various wastewater generated in the production process, are discharged into the we...

Claims

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Application Information

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IPC IPC(8): C02F9/10
CPCY02W10/37C02F9/00C02F1/04C02F1/441C02F1/442C02F1/444C02F1/5236C02F1/54C02F1/56C02F1/66C02F2001/425C02F2301/08
Inventor 李春启岳培恒牟伟腾刘俊峰梅长松刘学武王宝强夏岚张文博
Owner DATANG INT CHEM TECH RESINST
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