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Discussion on the Application and Benefit of Rotary Cleaner

Edit:Xinertai Hydraulic MachineryUpDate:2020-02-16

A large amount of dirt is often accumulated in front of the inlets of pumping stations and hydropower stations. If it is not cleared in time, it will affect the output of the unit at a minimum, block or even crush the trash rack, endanger the normal operation of the pump station and the power station, and even cause greater damage.

Type hydropower stations, pumping stations, installation of rotary cleaning machines will have more and more obvious benefits. Take a power plant in Hunan Electric Power as an example. The power plant is a low-head runoff power station with axial-flow propeller units, because the forests in the upper reaches of the river are prosperous.

Straws and trees descend along the river during the flood season and are adsorbed by the power generation drainage to accumulate in front of the trash rack, reaching a thickness of 4-5 meters and reaching as far as 8-10 meters in front of the trash rack. The flow area of ​​the trash rack is reduced and the citation flow decreases. , The grid voltage difference increases, the power generation is negative

Lost. According to hydrological operation calculations, the annual loss of electricity is more than 4.8 million kw.h. Because the grid pressure difference is too large, it directly threatens the safety of hydraulic structures. The load rejection of the unit must be used to generate reverse water hammer, and at the same time, cooperation with human

The operation of electricity seriously disrupts the normal safety production order and causes huge impact damage to the unit. After retrofitting and installing the HQN rotary cleaning machine, after several times of flood tests, please do not reach the end of the flood period.

When the flow rate is 310m3/s), the flow velocity across the grid is less than 2m/s, the grid pressure difference is less than 0.2m, and continuous uninterrupted and trouble-free operation for more than 500 hours during the flood period, which fully ensures the normal operation of the unit. The hydropower station’s sewage cleaner renovation project

According to the Ming Dynasty, a total of 1.5 million yuan was invested in the sewage cleaner and the corresponding civil engineering renovation. Only during the flood period, to avoid the shutdown of the unit due to the pollution blockage, the additional power generation capacity is 2.96 million kw.h, and the local small hydropower station's on-grid electricity price is 0.29 yuan, which is desirable

Direct economic benefits, fundamentally recover all investment in one year. In addition, it can save nearly 100,000 yuan in the cost of manual pollution removal every year, eliminate the safety hazards caused by manual pollution removal, and avoid the damage to the unit due to shutdown load rejection and pollution cleaning.

Lifespan. To sum up, the overall operating principle of the rotary cleaning machine is simple, reliable for long-term operation, convenient for protection and maintenance, and has a high input-output ratio, which can bring obvious economic effects to various small hydropower stations and pumping stations.

Benefits and social benefits. The successful use experience in the past two decades has fully demonstrated that the advantages of the rotary cleaning machine type of small and medium-sized hydropower stations and pumping stations are clear.

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