System for treating desulfurization wastewater of coal-fired power plant by magnetic coagulation

A technology for desulfurization wastewater and coal-fired power plants, which is applied in the fields of magnetic field/electric field water/sewage treatment, flocculation/sedimentation water/sewage treatment, water/sewage treatment, etc. Prospects, high sludge moisture content, to achieve the effect of improving practical applicability, improving particle settling characteristics, and improving economic benefits

Inactive Publication Date: 2021-04-02
中能化江苏地质矿产设计研究院有限公司
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Problems solved by technology

But at the same time, a large amount of sludge will be produced, and the generated sludge has a high moisture content, which leads to high cost of subsequent sludge dehydration treatment, which greatly limits the application prospect of coagulation method

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  • System for treating desulfurization wastewater of coal-fired power plant by magnetic coagulation
  • System for treating desulfurization wastewater of coal-fired power plant by magnetic coagulation
  • System for treating desulfurization wastewater of coal-fired power plant by magnetic coagulation

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Embodiment Construction

[0029] In order to make the technical means realized by the present invention, creative features, goals and effects easy to be understood, the present invention will be further elaborated below in conjunction with specific embodiments.

[0030] The technical solution adopted by the present invention to solve the technical problems is: a system for magnetic coagulation treatment of coal-fired power plant desulfurization wastewater, selects a coal-fired power plant containing high suspended matter desulfurization wastewater to process, and the specific steps are as follows:

[0031] The desulfurization waste water is transported to the reactor through the pipeline, and the tertiary reaction is carried out in the reactor.

[0032] The first stage: After desulfurization wastewater is injected into the reactor, 30mg / L PAC coagulant and 6-8g / L magnetic powder are added through the dosing device (1), and stirred at a stirring speed of 50r / min for 1min.

[0033] The second stage: add ...

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Abstract

The invention relates to a system for treating desulfurization wastewater of a coal-fired power plant by magnetic coagulation. The system consists of a dosing tank, a stirring device, a stirring speeddistribution box, a water inlet controller, a rotary decanter, a submersible sewage pump and a rotary drum type magnetic mud sorting device. The treatment course comprises the following specific steps: the desulfurization wastewater enters a reactor from the bottom through a water inlet controller; a PAC coagulant and magnetic powder are added from the dosing tank, stirring is conducted for 1 minat a speed of 50 r / min, a PAM coagulant aid is added, stirring is conducted for 2 min at a speed of 250 r / min, stirring is conducted for 6 min at a speed of 50 r / min, standing is conducted for 30 minafter stirring is finished, supernatant in the reactor is guided out through the rotary decanter, desulfurization wastewater is injected, the above operations are repeated, the water outlet controller is turned on when bottom flocs reach the maximum storage capacity, the bottom flocculate is conveyed into a magnetic mud separator for separation, the separated magnetic powder can be repeatedly utilized, and the sludge is subjected to solidification treatment.

Description

technical field [0001] The invention belongs to the related field of sewage treatment, and in particular relates to a system for magnetic coagulation treatment of desulfurization wastewater in coal-fired power plants. Background technique [0002] The quality of desulfurization wastewater from coal-fired power plants is complex, with a large amount of suspended solids, salts, heavy metals, and COD. Especially the problem of high suspended solids, which is too high and difficult to settle will affect the treatment of other wastewater pollutants. At present, there are a large amount of fine particles in the desulfurization wastewater of coal-fired power plants that use gypsum desulfurization. The particulate matter in desulfurization wastewater is small, and it is often impossible to remove it by natural sedimentation in a high-salt environment. Therefore, it is often necessary to add a coagulant to the wastewater to solve the problem of high suspended solids through coagula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F103/18C02F101/30C02F101/14
CPCC02F1/56C02F1/5245C02F1/48C02F2101/30C02F2103/18C02F2101/14
Inventor 王新富王彦君赵恒吴求刚孟瑞艳何建国周晓芳
Owner 中能化江苏地质矿产设计研究院有限公司
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