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Method for recycling and treating reclaimed wastewater of makeup water treatment system of power plant

A treatment system and a technology for regenerating wastewater, which is applied in water/sewage treatment, neutralized water/sewage treatment, oxidized water/sewage treatment, etc. It can solve the problems of complete reuse of regenerated wastewater and unutilized useful substances of regenerated wastewater. , to achieve the effect of small investment, high environmental and economic benefits, and efficient reuse

Inactive Publication Date: 2016-04-20
STATE GRID HEBEI ENERGY TECH SERVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have not been able to realize the complete reuse of the regenerated wastewater of the make-up water treatment system, and the useful substances in the regenerated wastewater have not been fully utilized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) See Table 1 for the water quality of the mixed-bed acid-base regeneration wastewater of a power plant make-up water treatment system, and the water volume of the regeneration wastewater is 1m3 / h.

[0022] The water quality of recycled wastewater after mixing in Table 1

[0023] Hardness

Conductivity

Cl -

Na +

pH

0mmol / L

29.8ms / cm

7.8g / L

4.6g / L

10.3

[0024] (2) Filter the regenerated wastewater through a fiber filter to remove suspended solids in the regenerated wastewater. The turbidity of the effluent from the fiber filter is 1NTU.

[0025] (3) The filtered regenerated wastewater is desalinated by reverse osmosis. The reverse osmosis adopts one stage and two stages. The reverse osmosis inlet pressure is 10.0MPa. The recovery rate of the first stage is 80%, and the recovery rate of the second stage is 50%. , the total recovery rate is 90%. The water quality of the reverse osmosis product is shown in Table 2. Th...

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Abstract

The invention discloses a method for recycling and treating reclaimed wastewater of a makeup water treatment system of a power plant, which includes the steps of regulation of the pH value of mixed reclaimed wastewater, filtration, reverse osmosis desalination, electrolysis and the like. By means of simple process combination, the method realizes the nearly zero emission of the reclaimed wastewater of the makeup water treatment system of the power plant, i.e., most of the reclaimed wastewater is recovered, only a small amount of filter backwashing water is discharged out, moreover, an industrial salt component in the reclaimed wastewater is completely recycled, and thereby the high-efficiency and reliable recycling of the reclaimed wastewater of the makeup water treatment system of the power plant is realized.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater reuse, and in particular relates to a recycling treatment method for regenerated wastewater of a power plant make-up water treatment system. technical background [0002] At present, the regenerated wastewater of the power plant's make-up water treatment system is mainly discharged after neutralization with acid and alkali. The discharge of waste water with high salt content, especially high chloride ion content, is increasingly restricted. The following treatment methods have been reported for ion exchange resin regenerated acid-base wastewater: acid-base neutralization method, chemical reaction precipitation method, biochemical method, FENTON reagent method, nanofiltration / reverse osmosis method. However, none of these methods can realize the complete reuse of the regenerated wastewater of the make-up water treatment system, and the useful substances in the regenerated wastewater ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06
CPCY02A20/131C02F9/00C02F1/001C02F1/42C02F1/441C02F1/461C02F1/66C02F1/76
Inventor 范辉龙潇刘克成高燕宁
Owner STATE GRID HEBEI ENERGY TECH SERVICE CO LTD
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