A raw water deep treatment system for a thermal power plant

By using a deep water treatment system for thermal power plants, combining ultraviolet sterilization and submersible ultrafiltration membrane technology, the problems of equipment corrosion and shutdown caused by sudden water quality deterioration have been solved, achieving efficient and stable raw water treatment and ensuring the safe operation of the units.

CN224513325UActive Publication Date: 2026-07-17POWERCHINA SEPCO1 ELECTRIC POWER CONSTR CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
POWERCHINA SEPCO1 ELECTRIC POWER CONSTR CO LTD
Filing Date
2025-06-23
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing raw water treatment systems in thermal power plants are unable to effectively handle sudden deterioration in water quality, leading to accelerated equipment corrosion and the risk of production shutdown, and failing to meet the demand for high-purity water.

Method used

The system employs a deep treatment system for raw water from a thermal power plant, including a pre-sedimentation tank, a biological water tank, a submerged ultrafiltration membrane tank, and a product water tank. It is combined with ultraviolet sterilization devices, aerators, and dosing devices. The system performs deep treatment through submerged ultrafiltration membrane filtration and membrane bioreactors, and is automated using a DCS control system.

Benefits of technology

It has achieved effective treatment of sudden water quality deterioration, ensured the safety of water supply for the unit, reduced the risk of equipment fouling, improved treatment efficiency and equipment stability, and reduced the footprint and operating costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a kind of raw water deepening treatment systems of thermal power plant, including front sedimentation tank, biochemical pond, submerged ultrafiltration membrane pool and water production pool connected by pipeline in turn;Ultraviolet sterilization device is provided on the pipeline of the front sedimentation tank and biochemical pond connection;Two parallel membrane assemblies are provided in the submerged ultrafiltration membrane pool, the bottom of the submerged ultrafiltration membrane pool is provided with inclined plate and aerator, the lowest position of inclined plate is provided with return mud interface, the return mud interface is connected with biochemical pond by sludge pipeline, the submerged ultrafiltration membrane pool is also connected with dosing device;The utility model can realize to the raw water treatment of the occurrence sudden water quality deterioration phenomenon, using the system to carry out more deep processing to raw water, avoid to cause system equipment pollution, ensure unit water safety and unit safe and stable operation.
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Claims

1. A raw water advanced treatment system for thermal power plants, characterized by, The system includes a pre-sedimentation tank, a biological water tank, a submerged ultrafiltration membrane tank, and a product water tank, which are connected in sequence by pipelines. An ultraviolet sterilization device is installed on the pipeline connecting the pre-sedimentation tank and the biological water tank. The submerged ultrafiltration membrane tank contains two parallel membrane modules. An inclined plate and an aerator are installed at the bottom of the submerged ultrafiltration membrane tank. A sludge return interface is installed at the lowest position of the inclined plate. The sludge return interface is connected to the biological water tank through a sludge pipeline. The submerged ultrafiltration membrane tank is also connected to a dosing device.

2. The raw water advanced treatment system for thermal power plants according to claim 1, wherein The ultraviolet sterilization device is a flow-through ultraviolet sterilization device, and multiple baffles are provided inside the cavity of the flow-through ultraviolet sterilization device.

3. The raw water advanced treatment system for thermal power plants according to claim 1, wherein The biochemical water tank is equipped with a biological packing frame.

4. The raw water advanced treatment system for thermal power plants according to claim 1, wherein The aerator is connected to the Roots blower via a pipeline. The aerator is located at the bottom of the membrane module and aerates the outside of the membrane fibers of the membrane module.

5. The raw water advanced treatment system for thermal power plants according to claim 4, wherein The aerator is a microporous tubular aerator.

6. The thermal power plant raw water advanced treatment system of claim 1, wherein, The dosing device includes a dosing tank and a dosing pump. The dosing tank is connected to the dosing pump via a pipeline, and the dosing pump is connected to the submerged ultrafiltration membrane tank via a pipeline.

7. The thermal power plant raw water advanced treatment system of claim 1, wherein The product water tank is connected to the submerged ultrafiltration membrane tank via a return water pipeline. A backwash pump is installed on the return water pipeline to provide flushing water to the submerged ultrafiltration membrane tank.

8. The thermal power plant raw water advanced treatment system of claim 1, wherein, The membrane module is a membrane bioreactor, which is immersed in the water to be treated in a submerged ultrafiltration membrane tank and produces water by negative pressure suction.

9. The thermal power plant raw water advanced treatment system of claim 1, wherein, Two inclined plates are provided, and the two inclined plates are tilted towards the middle position of the bottom of the submerged ultrafiltration membrane tank, with an inclination angle of 10°-20°.

10. The thermal power plant raw water advanced treatment system of claim 1, wherein, It also includes a DCS control system, which provides interlocking control over the processes of water production, backwashing, aeration, sludge return, and chemical dosing.