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Power plant sewage treatment method

A treatment method and technology for power plants, which are applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., which can solve the problems of high water treatment costs, environmental pollution, and complicated operations. , to achieve the effects of good water conductivity and desalination stability, extended cleaning cycle and short recovery period

Pending Publication Date: 2021-04-16
DATANG HUAIBEI POWER PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing power plant sewage treatment process has many steps and complicated operation, and antiscalants are usually added to the system to prevent scaling
In these processes, a large number of chemical agents such as flocculants and scale inhibitors are used. On the one hand, the cost of water treatment remains high, and on the other hand, the discharge of concentrated water causes great pollution to the environment.

Method used

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  • Power plant sewage treatment method

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Experimental program
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Effect test

Embodiment 1

[0020] Adopt method of the present invention to total hardness be 2000mg / L (as CaCO 3 Purification of power plant sewage: first, the power plant sewage is subjected to organic matter removal, heavy metal removal, softening treatment and filtration pretreatment, and then the pretreated power plant sewage enters the reverse osmosis device for reverse osmosis treatment, and obtains first serum and concentrate;

[0021] Let the first clear liquid enter the membrane crystallization device, perform the membrane crystallization treatment at 5-40°C, obtain solid salt crystal particles on one side of the membrane, and obtain purified water on the other side;

[0022] The concentrated solution enters the settling tank for the settling treatment to obtain the second clear liquid and mud, the mud is drawn out of the system, and the second clear liquid is mixed with the first clear liquid and then enters the membrane A crystallization device performs the film crystallization process;

[...

Embodiment 2

[0025] The method of Embodiment 1 is used to treat the sewage of the power plant, the only difference is that the power of the electromagnetic antiscaling coil is 100W.

Embodiment 3

[0027] Adopt the method for embodiment 1 to process power plant sewage, difference is only: the total hardness of described power plant sewage is 5000mg / L (as CaCO 3 count).

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Abstract

The invention discloses a power plant sewage treatment method. The treatment method comprises pretreatment, reverse osmosis treatment, sedimentation treatment and membrane crystallization treatment. The method comprises the following steps: carrying out pretreatment on the sewage of the power plant, and then enabling the pretreated sewage of the power plant to enter a reverse osmosis device for reverse osmosis treatment to obtain a first clear solution and a concentrated solution; enabling the first clear liquid to enter a membrane crystallization device, carrying out membrane crystallization treatment at 5-40 DEG C to obtain solid salt crystal particles on one side of a membrane, and obtaining purified water on the other side of the membrane; enabling the concentrated solution to enter a sedimentation tank for sedimentation treatment to obtain a second clear solution and slurry, leading the slurry out of the system, mixing the second clear solution with the first clear solution, and enabling the mixture to enter the membrane crystallization device for membrane crystallization treatment. According to the embodiment of the invention, the scale inhibitor is not used, so that medicament cost is saved; pure physical water treatment is adopted, and environmental benefits are good. The invention is suitable for sewage treatment of power plants.

Description

technical field [0001] The invention belongs to the field of sewage treatment in power plants, and in particular relates to a treatment method for sewage in power plants. Background technique [0002] Water resources are basic natural resources and strategic economic resources, and are an important foundation for sustainable social and economic development and maintaining ecological balance and a harmonious environment. The electric power industry is the basic industry of the national economy and an important energy industry. In the total installed capacity of power generation in the country, thermal power generation accounts for more than 70%, and the water consumption of thermal power generation accounts for 40% of all industrial water consumption. Due to the large water consumption of thermal power plants, sewage from power plants Disposal issues have become an important factor restricting the development of the power industry, and how to realize low-cost and environmenta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02
Inventor 赵品华张杰
Owner DATANG HUAIBEI POWER PLANT
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