Abstract: In view of the problems such as the sediment intake at the water intake, the sediment in the wellbore, the short life of the deep well pump, and the instability of the water inlet valve during the operation of the deep well pump station with high water content, the corresponding solutions are proposed and comprehensively managed Improve, and achieved good results. Key words: high silt water; deep well pumping station; comprehensive management Panzhihua New Steel Vanadium Company Power Plant deep well pumping station is located in the Jinsha River, in the flood period takes the company's production of water tasks, the layout of the facilities shown in Figure 1. Four DN1200 diversion pipes were used to introduce the river water into two wellbores with a diameter of 18m and a depth of 30m. Ten 30JD-19 * 3 long shaft deep well pumps (Q of 1440m3 / h, H 800kPa), to high water into the water treatment plant. Sands of the Jinsha River in the flood period of sediment up to 24kg / m3, of which 0.1mm above the grain size of more than 30% of the coarse sand, while a large number of slag slag upstream site also downstream down to Sham Tseng pumping station water Mouth, the deep well pump station is put into operation one month later due to sand and paralyzed state, a serious threat to the second phase of Panzhihua Iron and Steel production. 1, the treatment of intake sediment (slag) In the deep well pumping station put into operation the first flood period, the outlet in a few days that the phenomenon of siltation dead, the analysis found that this is due to the upstream convex and the Department The shape of the river makes the water intake just in the siltation area. The solution is as follows: ①blow up the upper part of the reef and convex part of the reef and cut off a slope, the main purpose is to make the upper stream of water flow around the convex nozzle and reefs rather bias the left bank where the intake, speed up the intake At the same time to reduce the sediment deposition in the area; (2) dredging the riverbed near the water intake to make the shape of the riverbed consistent with the flow and velocity of the river, reducing siltation as much as possible, and at the same time, A certain height difference, so that "clear before the door"; ③ in the other side of the intake to build a small bar Ding, its axis and right bank angle of 60 °, crest elevation of 995m (intake elevation of 990m), dam As long as 80m, the forced damming of the Dingba moves the mainstream of the river to the left bank where the water intake is located. After the implementation of the program, no serious siltation accident occurred in the riverbed adjacent to the water intake, and basically no siltation or erosion was achieved. 2, the treatment of sand in the wellbore After the water from the diversion pipe into the wellbore, the flow rate is greatly reduced and coarse sand and slag quickly deposited and caused the wellbore silt, can only rely on artificial dredging to maintain production. In this regard, the following measures have been taken: (i) Increasing the water intake of the middle water level During the flood season, when the water level of the river rises, the amount of sand (slag) in the upper water is relatively large, whereas when the water level is stable, Slag) increase, so in the upstream wellbore elevation of 994m, the downstream wellbore elevation of 995m Department to increase the water intake and outside the water intake to install a hole diameter <14mm steel filter to prevent the grain size> 14mm slag into the wellbore. (2) Adding a special sand trap to eliminate the sand at the dead angle between the water diversion chamber and the suction block. Volume expansion after pressure reduction and pressure reduction of the air according to gas, water, sand (gas phase, liquid phase, solid phase) (See Fig. 2), as long as the water level is raised and maintained at a certain submergence ratio (the ratio of sand discharge height and water level height), even slag having a particle size of about 30 mm can be Drain away. Install 5-6 gas ballasting devices in the dead ends and the sediment-laden area of ​​each wellbore. At the same time, build an air compressor station and corresponding gas pipelines, drainage pipes and ditches. ③ increase backflushing system at the bottom of the well Adds the pipeline in the easterly area and the lower part of the pump head and installs a certain number of nozzles at different angles. When the sediment reaches a certain level (obtained by measuring the sand) Road access to high-pressure water, the nozzle spray water agitated sediment, sediment can be discharged by the following method: a, deep well pump away; b, the wellbore water level to a certain extent (external irrigation) suddenly Open the inlet valve, so that the water and sediment in the well under the pressure of the cistern along the backwash into the river; c, a special row of sand drain away. 3, the transformation of some of the equipment due to wear and clogging of sediment, but also resulted in a deep pump running life is short (average operating life of only about 3000h), DN1200 water shutoff valve closed lax issue. ①deep well pump analysis, radial rubber bearings along the drive shaft (8) is easily damaged is caused by the short life of deep well pump the root cause. Radial rubber bearing damage in two ways: a. Bearing cooling water pipes are often broken, because underwater can not be easily found, so high-pressure cooling water can not enter the rubber bearings, which not only makes the bearing can not get hot Cooling, but also with a lot of sediment of the river will enter the bearings to speed up the bearing wear; b. Rubber bearing wear to be improved. Due to the rigid connection of the cooling water pipes of the rubber bearing, the stress concentrated parts will be broken due to fatigue, therefore, the water pipes are replaced with high-pressure rubber hoses. In addition to ensure that the radial bearing wear resistance, to transform it into a composite of two materials (bearing contact with the inner ring made of filled polytetrafluoroethylene, the outer ring made of rubber), so that both radial bearings The toughness also ensures its wear resistance, but also reduces costs. Improved pump life reached 10000h or so. ② diversion butterfly valve installed on the diversion pipe 4 DN1200 diversion butterfly valve. Butterfly valve rubber seals easily fall off and can not be replaced due to the valve installed in the water, the other easy to be the valve plate debris and debris stuck in the water there is the problem of lax closure. To this end to replace the valve butterfly valve for the diversion valve, taking into account the valve can only be closed effectively function, so the valve plate just below the body to open a square hole 200mm × 960mm and are divided into four grid, so that the sand (Slag) into the well through this hole will not be deposited here, in addition to the central body of the valve into a high-pressure pipe (also accessible through the compressed air) to flush this hole to wash away the sediment and will not affect the closure of the valve .