The sewage discharged from the power plant must undergo strict treatment, but pollution prevention is still very important. Pollution prevention and control According to the water quality characteristics of various types of waste and sewage, the method of clean sewage and centralized treatment is adopted, and the waste water from each water system is concentrated in the industrial waste water treatment station, desulfurization waste water treatment system, coal water treatment system, and domestic sewage treatment system. Wait for treatment, and all the treated wastewater will be reused.
1. Industrial wastewater treatment station:
Industrial wastewater is collected through the industrial wastewater sewer in the factory, enters the industrial wastewater regulating tank, and is pumped from the industrial wastewater to the industrial wastewater treatment room. The treated clean water is lifted by the clean water pump and replenished to the desulfurization water system and the circulating water system. The industrial waste water treatment system includes facilities and equipment such as grilles, industrial waste water regulating tanks, industrial waste water treatment equipment, industrial waste water recycling clean pools and clean water lifting pumps.
2. Desulfurization wastewater treatment system:
Equipped with desulfurization wastewater treatment device, the desulfurization wastewater is used for dry ash humidity control, ash field spraying, and dry slag humidity control after treatment.
3. Coal water treatment system:
The water for hydraulic cleaning, spraying and dust removal of the coal conveying system is supplied from the drainage of the system after being collected and processed. The washing and drainage of the coal conveying system is lifted by the pumps installed in each transfer station, and sent back to the coal water treatment room through the coal water pipeline for treatment. After the integrated treatment of sedimentation and filtration, it is reused for the washing of the coal conveying system.
4. Domestic sewage treatment system:
Collected to the domestic sewage treatment station through the domestic sewage drainage pipe network in the plant area, after treatment, used for plant greening, and discharged into the industrial waste water treatment station of the plant area in winter to be used for the industrial water of the desulfurization island.
5. Non-recurring drainage Non-recurring drainage such as boiler pickling water, air preheater flushing water, etc.
After the new boiler is started up and the boiler is overhauled, the boiler and high-pressure steam and water pipelines need to be pickled, generally once every 4-5 years, and the boiler pickling wastewater is drained irregularly. Boiler pickling waste water is transported to the plant boiler pickling waste water tank or industrial waste water treatment station, and recycled after treatment with industrial waste water treatment equipment.