Water pump station water inlet pool sediment cleaning method

Abstract

The invention discloses a water pump station water inlet pool sediment cleaning method. The method comprises the steps that S1, a sedimentation pool is arranged on the opposite side of a water inlet pool of a water pump station, and the water inlet pool and the sedimentation pool are separated through a water retaining wall; the sedimentation pool is divided into a sediment sedimentation area and a water diversion transition area, and the elevation of a bottom plate of the sediment sedimentation area is lower than the elevation of a bottom plate of the water diversion transition area and the elevation of a bottom plate of the water inlet pool; S2, a sand guide groove is formed in the bottom plate of the water inlet pool, extends from the water inlet of the water inlet pool to the position of the water retaining wall of the sediment sedimentation area and communicates with the sediment sedimentation area through a flow guide hole; S3, a bypass water diversion pipe is arranged in the water diversion transition area and communicates with a water pumping pipe of the water pump station through an electric valve; S4, when the water pumping pipe of the water pump station normally pumps water, a water level difference is formed between the water inlet pool and the sediment sedimentation area through the combined action of the flow guide hole and the sand guide groove; and S5, a mud pump truck is regularly adopted to clean sediment in the sediment sedimentation area in a centralized mode. According to the method, the water pump station does not stop during sediment cleaning, and normal water supply is guaranteed.

Description

technical field [0001] The invention relates to the field of long-distance water diversion projects of water delivery channels, in particular to a method for cleaning mud and sand in water inlet pools of water delivery pump stations. Background technique [0002] In the long-distance water diversion project of large rivers and canals, it is essential to set up water pumping stations, which provide water supply security for urban economic and social sustainable development. The water delivery pump station usually includes: forebay, overhaul gate, water inlet pool, water pump room and auxiliary workshop and other buildings. After the water delivery pump station is put into operation, the staff need to regularly enter the water intake pool to clean up the silted sand, and the water pump needs to be shut down to interrupt the water supply when cleaning the sand. At present, the staff of the water pumping station encounter problems that need to be solved during the work process:...

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Problems solved by technology

[0004] 2. With the operation of the pump station, after the silt in the inlet pool reaches a certain level, the sedimentation speed will no longer be the same as that in the initial operation of the inlet pool, and the sedimentation speed will slow down accordingly, and the sediment brought by the water body will Most of it enters the water pump and pumps it into the water delivery pipeline, and then deposits in the water delivery pipeline; in addition, the machine sediment for the water pump will also accelerate the wear of the pump impeller

[0005] 3. It needs to be cleaned once a year to clean up the silt in the inlet pool. The pump needs to stop running and the water supply should be interrupted to clean up the sediment. The annual average cost of cleaning up the sediment is more than 200,000 yuan, which leads to high operating costs of the pumping station.

[0006] 4. The silt deposited in the water inlet pool contains algae organic matter. Fermentation begins in May every year, and bubbles can be seen directly on the water surface. It is the most serious in August and September, polluting the water quality of the pumping station

According to the current design codes, there are no specific design codes and standards for the cleaning of sediment in the water pumping station inlet tank, and there are no provisions in the relevant architectural design codes for the water pumping station inlet tank to clean up the sediment

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