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Treatment process for purifying chlorine-containing wastewater by ammonium salt crystallization

A technology for treating process and wastewater, applied in natural water body treatment, multi-stage water treatment, water/sewage treatment, etc. It can solve the problems of complicated desalination process, generation of hazardous waste, high energy consumption, etc., and achieve simple process flow and purification effect. Good, less process effect

Active Publication Date: 2021-04-30
SHIJIAZHUANG LVJIE ENERGY SAVING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention proposes a treatment process for ammonium salt crystallization to purify chlorine-containing wastewater, which solves a series of problems in the prior art, such as complicated desalination process, high energy consumption, large area occupation, high investment, and generation of hazardous waste.

Method used

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  • Treatment process for purifying chlorine-containing wastewater by ammonium salt crystallization
  • Treatment process for purifying chlorine-containing wastewater by ammonium salt crystallization
  • Treatment process for purifying chlorine-containing wastewater by ammonium salt crystallization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of chloride ion absorbent: Add 10kg of water-soluble chitosan to 15kg of water, heat to 100°C, add 5kg of bismuth nitrate while stirring, keep the temperature at 100-120°C, then add 1kg of polyvinyl alcohol, p-hydroxystyrene 0.5 kg of ketone and 0.5 kg of 1-methoxy-2-propanol were stirred for 2 hours to obtain a chloride ion absorbent.

[0030] The chlorine ion absorbent of the present embodiment is processed according to the following steps to the collection industrial wastewater of a certain power plant in Tangshan:

[0031] S1. Chloride ion absorbent and waste water enter the first-stage mixing tank at the same time, stir evenly and then stand and separate;

[0032] S2. The waste water treated by the primary stirring enters the secondary stirring tank, and at the same time, fills the secondary stirring tank with new chloride ion absorbent, stirs evenly and then leaves it to stratify to obtain the treated waste water;

[0033] S3. The chlorine ion absorbe...

Embodiment 2

[0036] Preparation of chloride ion absorbent: Add 15kg of water-soluble chitosan to 30kg of water, heat to 100°C, add 8kg of bismuth nitrate while stirring, keep the temperature at 100-120°C, then add 2kg of polyvinyl alcohol, p-hydroxystyrene 1 kg of ketone and 1 kg of 1-methoxy-2-propanol were stirred for 2 hours to obtain a chloride ion absorbent.

[0037] The chlorine ion absorbent of the present embodiment is processed according to the following steps to the collection industrial wastewater of a power plant in Baoding:

[0038] S1. Chloride ion absorbent and waste water enter the first-stage mixing tank at the same time, stir evenly and then stand and separate;

[0039] S2. The waste water treated by the primary stirring enters the secondary stirring tank, and at the same time, fills the secondary stirring tank with new chloride ion absorbent, stirs evenly and then leaves it to stratify to obtain the treated waste water;

[0040] S3. The chlorine ion absorbent separated ...

Embodiment 3

[0043] Preparation of chloride ion absorbent: add 12kg of water-soluble chitosan to 20kg of water, heat to 100°C, add 7kg of bismuth nitrate while stirring, keep the temperature at 100-120°C, then add 1.5kg of polyvinyl alcohol, p-hydroxybenzene 0.8 kg of ethyl ketone and 0.8 kg of 1-methoxy-2-propanol were stirred for 2 hours to obtain a chloride ion absorbent.

[0044] The chlorine ion absorbent of the present embodiment is processed according to the following steps to the industrial waste water used in embodiment 2:

[0045] S1. Chloride ion absorbent and waste water enter the first-stage mixing tank at the same time, stir evenly and then stand and separate;

[0046] S2. The waste water treated by the primary stirring enters the secondary stirring tank, and at the same time, fills the secondary stirring tank with new chloride ion absorbent, stirs evenly and then leaves it to stratify to obtain the treated waste water;

[0047] S3. The chlorine ion absorbent separated from ...

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Abstract

The invention relates to the technical field of wastewater treatment, and provides a treatment process for purifying chlorine-containing wastewater by ammonium salt crystallization. The method comprises the following steps: S1, simultaneously feeding a chloride ion absorbent and wastewater into a primary stirring tank, uniformly stirring, standing for layering, and separating out the chloride ion absorbent and primary wastewater; S2, subjecting the primary wastewater to primary stirring treatment enters a secondary stirring tank, meanwhile, introducing a new chloride ion absorbent into the secondary stirring tank, and performing standing and layering after uniform stirring so as to obtain treated clear water for recycling; S3, enabling the chloride ion absorbent separated from the first-stage stirring tank to enter a regeneration tank, recovering the chloride ion absorbent, and enabling the recovered chloride ion absorbent to enter a second-stage stirring tank; and S4, introducing the chloride ion absorbent separated by the second-stage stirring tank into the first-stage stirring tank so as to form circulation. By means of the technical scheme, a series of problems that in the prior art, a desalting process is complex, energy consumption is high, occupied space is large, investment is high, and hazardous waste is generated are solved.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a treatment process for ammonium salt crystallization to purify chlorine-containing wastewater. Background technique [0002] With the rapid development of industry, the discharge of wastewater has increased sharply. Nowadays, natural water bodies including rivers, lakes and oceans are inevitably affected by industrial and agricultural wastewater and domestic sewage. [0003] Excessive concentration of chloride ions in industrial circulating water will cause pitting corrosion, crevice corrosion and stress corrosion of heat exchange equipment, threatening production safety. Chloride ions in the solution can destroy the passivation film on the surface of various metals and their alloys, which can easily cause various localized corrosion of metal equipment, and bring various troubles and hidden dangers to the normal operation of equipment, the realization of new process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58C02F101/12
CPCC02F1/58C02F2101/12C02F1/288C02F2301/08C02F2303/16C02F2103/34C02F2001/5218C02F1/5236C02F1/38B01J20/24B01J20/0259B01J20/0296B01J20/3085B01J2220/46
Inventor 王占军刘婷石建坡王立鹏
Owner SHIJIAZHUANG LVJIE ENERGY SAVING TECH CO LTD
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