Desulfurated waste water resourceful treatment method and treatment system

A treatment method and desulfurization wastewater technology, which is applied in the direction of energy wastewater treatment, gaseous discharge wastewater treatment, multi-stage water treatment, etc., can solve the problems of difficult comprehensive utilization, large dosage of chemicals, and large amount of strong alkaline sludge and other issues to achieve the effect of increasing the available value

Inactive Publication Date: 2017-05-31
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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  • Desulfurated waste water resourceful treatment method and treatment system
  • Desulfurated waste water resourceful treatment method and treatment system
  • Desulfurated waste water resourceful treatment method and treatment system

Examples

Experimental program
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Effect test

Embodiment 1

[0097] 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.

[0098] 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 submerged ultrafiltration unit, an ion exchange unit, a reverse osmosis unit, an evaporation concentration unit, a crystallization unit, and a crystallization unit connected in sequence. Salt separation unit. The technical parameters of the processing system are as f...

Embodiment 2

[0151]This example is used to illustrate the treatment of desulfurization wastewater generated during 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.

[0152] 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 filtration unit, acidification unit, ion exchange unit, ultrafiltration unit, electrodialysis concentration unit, evaporation concentration unit, crystallization unit and Crystalline salt separation unit. The technical parameters of the processing system are as follows:

[0153] The wate...

Embodiment 3

[0203] 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.

[0204] specifically, 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 pH adjustment-coagulation unit, dissolved air flotation unit, phosphate precipitation unit, coagulation filtration unit, acidification unit, ultrafiltration unit, forward osmosis concentration unit, evaporation concentration unit, crystallization unit, crystalline salt separation unit and product water reverse osmosis unit. The technical parameters of the processing system are as follows:

[0205] Water q...

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Abstract

The invention provides a desulfurated waste water resourceful treatment method. The method includes the steps that desulfurated waste water is pretreated to remove suspended matter and/or colloid and heavy metal ions; 2, pretreated effluent obtained in the step 1 is subjected to phosphate precipitation; 3, phosphate precipitation effluent obtained in the step 2 is softened, wherein softening comprises the procedures of ion exchange and/or coagulation, and optionally, softening further comprises the procedures of acidification and/or filtration; 4, softened effluent obtained in the step 3 is subjected to membrane concentration; 5, membrane concentration concentrated water obtained in the step 4 is subjected to evaporation and concentration, and evaporation and concentration liquid and evaporation and condensation liquid are obtained; 6, the evaporation and concentration liquid obtained in the step 5 is subjected to crystallization salt separation, and crystallized salt, the evaporation and condensation liquid and crystallized mother liquor are obtained. The invention further provides a treatment system 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 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 wet desulfur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F101/20C02F103/18
CPCC02F1/001C02F1/04C02F1/24C02F1/38C02F1/441C02F1/444C02F1/445C02F1/5236C02F1/5245C02F1/56C02F1/66C02F9/00C02F2101/20C02F2103/18C02F2301/08Y02W10/37
Inventor 李春启岳培恒牟伟腾刘俊峰梅长松刘学武王宝强岳子明王金惠
Owner DATANG INT CHEM TECH RESINST
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