Centralized water supply method integrating sewage reuse and sea water desalination

A sewage and sewage treatment system technology, applied in the direction of chemical instruments and methods, general water supply saving, water/sewage multi-stage treatment, etc., can solve the problems of unrealistic and high cost, achieve high reuse rate, reduce investment cost, fresh water The effect of low water cost

Inactive Publication Date: 2011-09-07
KAILUAN ENERGY CHEM
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However, it is too expensive for some small chemical companies to build a

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  • Centralized water supply method integrating sewage reuse and sea water desalination
  • Centralized water supply method integrating sewage reuse and sea water desalination

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[0017] figure 1 As shown, this centralized water supply method integrating sewage reuse and seawater desalination realizes the centralized treatment of sewage and the centralized supply of fresh water in Linhai Coal Chemical Industry Park by sharing the sewage treatment system, reclaimed water reuse system and seawater desalination system. The sewage treatment system is composed of A / O / O biochemical, sand filtration, ultrafiltration and nanofiltration process units; the reclaimed water reuse system is composed of lime + flocculation sedimentation, multimedia filtration, resin softening, ultrafiltration, reverse Composition of permeation and evaporative crystallization process units.

[0018] figure 1 As shown, in the specific implementation process of this centralized water supply method, the discharge of sewage in the coal chemical industry park, the water quality characteristics of each sewage discharge point, and the consumption of fresh water are firstly analyzed in detai...

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Abstract

The invention discloses a centralized water supply method integrating sewage reuse and sea water desalination. The method comprises the following steps: the heavily-polluted sewage is firstly treated by a sewage treatment system based on biological and advanced treatment, a part of the effluent from the sewage treatment system and the slightly-polluted sewage are fed into and treated in a reclaimed water reuse system, and the other parts of the effluent from the sewage treatment system and the effluent from the reclaimed water reuse system are classified and recycled according to the effluent quality and the actual needs for water consumption; the fresh water required for classification and recycling is supplied by a sea water desalination system; the sewage treatment system comprises an A/O/O biological unit, a sand filtration unit, a ultra-filtration unit and a nano-filtration unit; and the reclaimed water reuse system comprises a lime/flocculant precipitation reaction unit, a multi-medium filtration unit, a resin softening unit, a ultra-filtration unit, a reverse osmosis unit and an evaporative crystallization unit. The method achieves the effects of centralized sewage treatment and centralized fresh water supply in the whole chemical industrial area, has the characteristics of low sewage treatment cost and high reuse rate, and achieves high-efficiency utilization of energy.

Description

technical field [0001] The invention relates to the technical field of water treatment engineering, in particular to a centralized water supply method integrating sewage reuse and seawater desalination technologies. Background technique [0002] The total amount of fresh water resources in my country is 2.7 trillion cubic meters, ranking sixth in the world, but the per capita water volume is only 1 / 4 of the world's per capita share, ranking 110th in the world. At present, more than 200 cities in my country are short of water. The seven northern provinces and cities with a population of 38% only account for 9.7% of the total fresh water resources. Beijing suffers from a water shortage of more than 1 billion cubic meters every year, and the groundwater level has dropped to more than 30 meters in some places. In the development of the chemical industry in northern my country, water shortage is a big constraint factor. For Linhai Chemical Industry Park, the implementation of ...

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Application Information

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IPC IPC(8): C02F9/14F22D11/06C10L9/10
CPCY02A20/131
Inventor 裴华房承宣徐贺明王亚涛王军李建华严加才于泳
Owner KAILUAN ENERGY CHEM
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