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Wastewater recycling treatment process

A treatment process and wastewater recycling technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, ion-exchanged water/sewage treatment, etc., can solve problems such as low recovery rate, failure, pollution, etc. The effect of environment, stable operation and high practicability

Inactive Publication Date: 2010-07-07
郑理慎
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Problems solved by technology

[0010] Due to its own limitations (such as the limitation of fouling), conventional nanofiltration / reverse osmosis has a low overall recovery rate, usually 40-75%. The pollution of organic matter, oil and grease will affect the operation of the nanofiltration / reverse osmosis system, or even fail

Method used

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Embodiment Construction

[0023] Such as figure 1 As shown, the raw water enters the filter 2 (which can be a media filter, microfiltration membrane or ultrafiltration membrane) under the action of the raw water pump 1, and the suspended matter and solid particles in the raw water are removed through the filter 2, and the filter The effluent water from 2 enters the ion exchanger 3. The ion exchanger (which can be hydrogen type or sodium-hydrogen series type) removes the calcium and magnesium ions in the raw water through ion exchange to remove the hardness in the water. At this time, the water is acidic and the ion The effluent from the exchanger 3 enters the decarbonization tower 4, and the CO in the raw water is blown off by the rotary fan 5 2 is removed, the alkalinity of the raw water is removed; the raw water from the decarbonization tower 4 enters the precision filter 7 under the action of the lift pump 6, and the precision filter 7 can trap particles larger than 5 microns, and the effluent of th...

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Abstract

The invention discloses a wastewater recycling treatment process, which comprises the following steps: leading raw water to pass through a filter for removing suspended matters and solid particles in the raw water, leading outlet water of the filter to enter into an ion exchanger, removing calcium and magnesium ions in the raw water through ion exchange, further removing the hardness in the water, leading the outlet water of the ion exchanger to enter into a decarbonizing tower, and removing the alkalinity of the raw water under the air stripping action of a rotary fan; leading the raw water out of the decarbonizing tower to enter into a precision filter under the action of a lifting pump, lifting the outlet water of the precision filter to a nano-filtration / reverse osmosis system which is mainly formed by parallel connection and / or series connection of a nano-filtration membrane and a reverse osmosis membrane under the action of a high pressure pump, leading the nano-filtration / reverse osmosis system to discharge concentrated water, leading the nano-filtration / reverse osmosis system to drain produced water into a produced water tank, and becoming the final outlet water. The process can effectively avoid the membrane pollution, improve the recycling rate, further greatly reduce the discharge amount of wastewater, simultaneously reduce the using amount of membranes due to the improvement of running conditions of a membrane system and further reduce the investment and the running cost.

Description

technical field [0001] The invention relates to a wastewater recovery and treatment process. Background technique [0002] Use physical, chemical and biological methods to treat wastewater, purify wastewater, reduce pollution, so as to achieve wastewater recycling and reuse, and make full use of water resources. Modern wastewater treatment is mainly divided into three categories: physical treatment, chemical treatment and biological treatment: [0003] ①Physical treatment. The wastewater treatment method that separates and recovers insoluble suspended pollutants (including oil film and oil beads) in wastewater by physical action can be divided into gravity separation method, centrifugal separation method and sieve retention method. Treatment based on the principle of heat exchange also belongs to physical treatment. [0004] ②Chemical treatment. A wastewater treatment method that separates and removes dissolved and colloidal pollutants in wastewater or converts them into...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02C02F1/44C02F1/42
Inventor 郑理慎曾小芳王薇陈志平
Owner 郑理慎
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