SU1682471A1 - Method for cleaning receiving wells of mine water pumping plant - Google Patents

Abstract

The invention relates to the construction, in particular to drainage, can be used in the construction and operating mine drainage installations and is aimed at improving the efficiency and reliability of operation. This is achieved by directing the slurry into the pumped well as a stream. The direction of flow of the slurry into the well can be carried out through its top or over the bottom of the well with the additional vzmuchivaniem settled on the bottom of solid inclusions. Before directing the flow of slurry through the top of the pumped well, it can be separated from the stream by a filter of solid inclusions larger than 0.25 mm. З З.п. f-ly, 2 ill.

Description

The invention relates to construction, in particular to drainage, and may find application in construction and existing mine drainage installations.

The purpose of the invention is to increase the efficiency and reliability of work.

FIG. 1 shows a drainage installation with the introduction of a slurry stream into the pumped well from above; figure 2 is the same, with the introduction of the slurry stream over the bottom of the well.

The drainage installation (Fig. 1) includes a pumping chamber 1, pumps 2 and 3, they are sucked 4 and 5 placed in receiving wells 6 and 7, of which the first adjoins the adjusting water collector 8 and the second to the water collector 9, which can perform emergency function. Hours 4 and 5 are located below the lower level (WL) of water, the mark of which in turn is lower than the bottom of the catchment basins 8 and 9. Below inlets 4 and 5 are located the asses 10 and 11 of auxiliary slurry pumps in the form of hydraulic elevators 12 and 13. 15, separating wells 6 and 7 from water collectors 8 and 9, bypass valves 16 and 17 are mounted. Between wells 6 and 7 there is a blank wall 18, in which an overflow channel 19 is installed below NU. At this point the outlets from the discharge pipelines 20 and 21 of hydraulic elevators 12 and 13 are placed on the side of the upper sections of the well EVs 7 and 6. Moreover, each of the hydraulic sealers 12 and 13 can be used to enter the slurry flow into any of the wells 6 and 7. The working pipes 22 and 23 of the hydraulic elevators 12 and 13 are connected to the discharge of pumps 2 and 3 via valves 24 and 25 Pipelines 20 and 21 are equipped with valves 26 and 27. A filter - slotted sieve 28 can be installed above one or above each well 6 and 7.

In the installation (FIG. 2), the outlets from the discharge pipes 20 and 21 of sequence 00

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communicated with each other. In the installation (Fig. 1) it is possible to install an overflow 29, hermetically mounted on the valve 30 of the channel 19, together the wells 6 and 7 at the level above NU.

The method is implemented as follows.

In the initial position, valves 16, 17 and 30 (Fig. 1) are open, overflow 29 is absent, catchment basins 8 and 9 and wells 6 and 7 communicate freely between themselves below the well. The inflow of water enters the regulating water collector 8 and fills it, starting from WELL, all the above-mentioned production. At the same time, a part of solid particles carried in it, taken from the catchment basin 8, is deposited on the bottoms of wells 6 and 7 with a gradual increase in the volume occupied by them. After filling to the upper level (WU) of water, part of pumps 2 or 3 of the installation is turned on and water is released to the surface, and its level is again lowered to LL, after which pumps 2 or 3 are switched off again. In the process of pumping out the inflow, after accumulation of a certain mass of sludge, for example, at the bottom of the well 6, sludge is periodically collected from it using a hydraulic elevator 12, which is put into operation by opening the valves 24 and 26. Thanks to this, using suction 10, before By removing the slurry to the surface, the well 6 is formed in the well 6, directed by the pipeline 20 into the pumped well 6 or 7, while the flow of the slurry into the well 6 or 7 is directed through its top. If pump 3 is in operation, the slurry is sent to the well 7. The solid particles contained in the slurry, falling into the volume of water in the well 7, are for some time transferred to the suspended turbid state, which makes it easier to collect them using suction 5. At the same time the removal of sludge from the suctions 4 and 5 of pumps 2 or 3, removing it to the surface with the help of these pumps.

Before directing the slurry flow into the pumped well 6 or 7, a stream of solid inclusions larger than 0.25 mm can be separated from it by means of a filter - slotted sieve 28 with a slit size of 0.2-0.5 mm, which ensures reliable operation of pumps 2 and 3 and overall drainage.

The use of sieve 28 provides a more uniform distribution of slurry introduced into wells 6 or 7 over their section.

In the installation depicted in FIG. 2, the slurry stream from conduit 20 is directed to conduit 21 of hydraulic elevator 13 through suction 11 (in the opposite direction through hydraulic elevator 13) into well 7 above its bottom with vortexing of solid inclusions previously deposited on its bottom.

It is practically advisable to use overflow 29, which reduces the geometric suction height to 1-1.5 m, which eliminates cavitation phenomena and provides the required reliability of operation of pumps 2 and 3 and the installation as a whole under conditions of a sharp increase in the content of solid inclusions.

In the proposed method, less pressure of the slurry pump is required and less energy and resources are expended than in other known methods.

As a result, the sludge removal process is simplified, and the safety, efficiency and reliability of the plant is increased. The method can also be applied to existing installations.

Claims (3)

1. A method of cleaning the receiving wells of a mine dewatering installation, including the precipitation of solid inclusions on the bottom of wells, stirring up the settled inclusions to form a slurry, collecting the latter with its removal to the surface, in order to increase the efficiency and reliability of the work They are directed to the pumped well as a stream. 2. A method according to claim 1, characterized in that the direction of flow of the slurry into the pumped well is through its top. 3. Method 1 and 2, characterized in that before directing the flow of the slurry into the pumped well, separation from it is carried out by means of a filter of solid inclusions larger than 0.25 mm. 4 A method according to claim 1, characterized in that the direction of the flow of the slurry into the pumped well is conducted over its bottom with the additional agitation of solid inclusions settled on the bottom. i i Yu s g 19 30 YU Fie.2