A zero-discharge treatment method and device for high-salt wastewater

A technology of high-salt wastewater and treatment device, which is applied in the field of high-salt and low-organic resource zero-discharge treatment, zero-discharge treatment method and device field of high-salt wastewater, to avoid secondary discharge, prolong service life, and realize the effect of resource utilization

Active Publication Date: 2022-08-02
北京禹涛环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In view of this, the main purpose of the present invention is to provide a zero-discharge treatment method and device for high-salt wastewater, while realizing zero-discharge of high-salt wastewater, it solves the problem of backwashing liquid produced by traditional resin or medicament removal. Secondary discharge, chemical use, deep removal of hardness and degradation of some organic matter at the same time, greatly reducing the pollution problem of subsequent reverse osmosis membranes, and also realizing the resource utilization of salt, increasing the added value of salt, and the whole method is environmentally friendly and resource efficient

Method used

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  • A zero-discharge treatment method and device for high-salt wastewater
  • A zero-discharge treatment method and device for high-salt wastewater
  • A zero-discharge treatment method and device for high-salt wastewater

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preparation example Construction

[0072] When the active component is selected from the combination of manganese dioxide, copper oxide, nickel oxide and cobalt oxide, the preparation method of the supported mesoporous activated carbon catalyst comprises the following steps:

[0073] a1 Put mesoporous spherical activated carbon into anhydrous nickel acetate (Ni(CH) 3 COO) 2 ), anhydrous copper acetate (Cu(CH) 3 COO) 2 ), cobalt acetate (Co(CH) 3 COO) 2 ), manganese acetate ((CH 3 COO) 2 Mn) is soaked in the immersion solution composed of 20-24h to obtain a mixed solution;

[0074] b1 Air-dry the mixed solution obtained in step a1 at normal temperature for 24-28h to obtain a semi-finished catalyst;

[0075]c1 Under a nitrogen atmosphere, the semi-finished catalyst obtained in step b1 is calcined in a resistance furnace at 1200-1400° C. for 6-8 hours to form, and then naturally cooled to room temperature.

[0076] Wherein, in step a1, the anhydrous nickel acetate (Ni(CH) 3 COO) 2 ), anhydrous copper ace...

Embodiment 1

[0114] The present embodiment provides a zero-discharge treatment method for high-salt wastewater, comprising the following steps:

[0115] 1) The high-salt wastewater is deeply dehardened by electrochemical method and organic pollutants are removed;

[0116] The high-salt wastewater is coking high-salt wastewater, and the main indicators of the influent are: COD Cr : 55mg / L, Cl - : 1100mg / L, SO 4 2- : 800mg / L, Ca 2+ : 41mg / L, Mg 2+ : 20mg / L, Na + : 2168mg / L; the parameters of the electrochemical method are as follows: the current density is 20mA / cm 2 , the residence time is 20min;

[0117]2) The effluent after electrochemical removal of hard and organic pollutants is desalinated by reverse osmosis, and the fresh water after desalination by reverse osmosis is reused;

[0118] The reverse osmosis desalination adopts two-stage low-pressure reverse osmosis, and the operating pressure is 1.8MPa;

[0119] 3) Ozone catalytic oxidation is carried out to the concentrated wate...

Embodiment 2

[0135] The present embodiment provides a zero-discharge treatment method for high-salt wastewater, comprising the following steps:

[0136] 1) The high-salt wastewater is deeply dehardened by electrochemical method and organic pollutants are removed;

[0137] The high-salt wastewater is coal gasification high-salt wastewater, and the main indicators of the influent are: COD Cr : 40mg / L, Cl - : 1200mg / L, SO 4 2- : 960mg / L, Ca 2+ : 50mg / L, Mg 2+ : 43mg / L, Na + : 2052mg / L; the parameters of the electrochemical method are as follows: the current density is 15mA / cm 2 , the residence time is 30min;

[0138] 2) The effluent after electrochemical removal of hard and organic pollutants is desalinated by reverse osmosis, and the fresh water after desalination by reverse osmosis is reused;

[0139] The reverse osmosis desalination adopts two-stage low-pressure reverse osmosis, and the operating pressure is 1.8MPa;

[0140] 3) Ozone catalytic oxidation is carried out to the conce...

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Abstract

The present invention relates to a zero-discharge treatment method and device for high-salt wastewater. The method comprises the following steps: deeply dehardening and removing organic pollutants from high-salt wastewater by an electrochemical method; The effluent is desalted by reverse osmosis, and the fresh water after reverse osmosis desalination is reused; the concentrated water of reverse osmosis is subjected to ozone catalytic oxidation; the effluent after ozone catalytic oxidation is subjected to salt separation recovery. The zero-discharge treatment method for high-salt wastewater provided by the present invention utilizes an electrochemical method for deep hardening. Compared with traditional resin softening, it avoids the secondary discharge of resin backwashing waste liquid, and degrades part of the hardening at the same time. Organic matter, greatly reducing the membrane fouling problem of subsequent reverse osmosis.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, in particular to a zero-discharge treatment technology for high-salt and low-organic resource recycling, in particular to a zero-discharge treatment method and device for high-salt wastewater. Background technique [0002] Water covers 3 / 4 of the ground, of which fresh water accounts for about 2.53%, and more than 60% of land fresh water is insufficient; my country's per capita water resources are 1 / 4 of the world's average level, and the water quantity is seriously insufficient. [0003] High-salt wastewater refers to wastewater with a total salt content of at least 1%, which is mainly from chemical plants and the collection and processing of oil and natural gas. High-salt wastewater has many hazards: 1) It leads to high osmotic pressure in the water body, resulting in dehydration and death of microbial cells; 2) Activated sludge is easy to float and drain, which seriously affects t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C02F101/10C02F101/30
CPCC02F9/00C02F1/441C02F1/442C02F1/46C02F1/4693C02F1/469C02F1/725C02F1/78C02F2101/30C02F2101/10C02F2301/08Y02A20/131
Inventor 许昌相刘小冕王丹
Owner 北京禹涛环境工程有限公司
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