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Wastewater treatment device

A waste water treatment, waste water technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as difficult industrial waste water treatment, to improve resource utilization, hard removal better effect

Inactive Publication Date: 2018-01-16
CHINA SHENHUA ENERGY CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a wastewater treatment device to solve the technical problem that industrial wastewater from thermal power plants is difficult to handle in the prior art

Method used

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Embodiment 1

[0044] use figure 1 The device shown, wherein the added flocculant is FeCl 3 , the dosage is 30mg / L; the coagulant aid used is PAM, and the dosage is 1-2PPM; after the wastewater is discharged from the quartz sand filter, the pH value of the wastewater is adjusted to 7.5-8.5 with hydrochloric acid; after ultrafiltration After the unit, add the reverse osmosis scale inhibitor PTRO100HD, the dosage is 3~5ppm.... Use sodium hydroxide to adjust the pH of the water to 9~10 before entering the reverse osmosis unit.

[0045] This treatment process has been verified for a long time. After treatment by this system, the water recovery rate is as high as 94%, and the conductivity of the produced water is as high as 94%. ≤50us / cm, desalination rate ≥98%, meet the water quality requirements of the reverse osmosis product of the original water workshop, all the produced water is recycled to the reverse osmosis production water tank of the original water workshop, and the operation is stabl...

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Abstract

The invention provides a wastewater treatment device. The device comprises a solid-liquid separation unit, a sodium ion exchanger, a weak acid cationic exchanger, an ultrafiltration unit and a reverseosmosis unit, wherein the solid-liquid separation unit is provided with a wastewater inlet and a liquid phase outlet and used for performing solid-liquid separation on wastewater; the sodium ion exchanger is provided with a first water inlet and a first water outlet, and the first water inlet is communicated with the liquid phase outlet; the weak acid cationic exchanger is provided with a secondwater inlet and a second water outlet, and the second water inlet is communicated with the first water outlet; the ultrafiltration unit is provided with a third water inlet and a third water outlet, and the third water inlet is communicated with the second water outlet; the reverse osmosis unit is provided with a fourth water inlet and a purified water outlet, and the fourth water inlet is communicated with the third water outlet. With the adoption of the device, the effluent conductivity is smaller than or equal to 50 us / cm, the salt removal rate is larger than or equal to 98%, the water recovery rate is larger than or equal to 94%, and zero emission of a thermal power plant is basically realized.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a wastewater treatment device. Background technique [0002] Northern my country is rich in coal resources and has built a large number of thermal power plants, but water resources are extremely scarce. With the increasingly strict requirements of power plant wastewater discharge standards and the establishment of water and drainage charging systems, thermal power plants, as major consumers of water and drainage, have become very important to save water and reduce wastewater discharge from the perspective of environmental protection and economic operation. necessary. [0003] The industrial wastewater of thermal power plants mainly includes: circulating water sewage and wastewater from chemical workshops, ground flushing water of the main workshop and backwashing drainage of valveless filters, boiler sewage and drainage water. The above wastewater is the wastewater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 张孝莲李秀琴张瀚升
Owner CHINA SHENHUA ENERGY CO LTD
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