CN214654008U - Underground mine water treatment device for coal mine - Google Patents

Abstract

The utility model discloses a mine water treatment device used in underground coal mine, which comprises a sand setting unit, a lift pump and a direct filtration unit; the direct filtration unit is arranged above the sand setting unit, mine water is pumped into the direct filtration unit through a lifting pump, the direct filtration unit is provided with a pressurized membrane separation structure, and the pressurized filtration membrane is provided with a pore size which enables small-molecule solutes and solvents smaller than the pore size to pass through the membrane to the water outlet side and enables large-molecule solutes larger than the pore size not to pass through the membrane under a preset pressure. The utility model provides a colliery is pit with pit water treatment facilities in pit handles suspended solid mine water in the pit, has solved that current mine water process flow is longer, the structure is complicated, overall dimension is too big, and connecting line is long, and power consumption is big, need to add coagulant and flocculating agent and bring secondary pollution scheduling problem.

Description

Underground mine water treatment device for coal mine

Technical Field

The utility model relates to a colliery mine underground mine water treatment technical field especially relates to a flexible ceramic membrane filtration technology application.

Background

The traditional underground mine water treatment process has a long flow, and comprises units such as a grit chamber, coagulation, sedimentation, filtration and the like, so that the occupied area is large, the structure is complex, the civil engineering cost is high, the connecting pipelines of the units are long, and the power consumption is high. And the addition of the chemicals increases the secondary pollution of the mine water, and brings adverse factors for the later advanced treatment of the mine water.

Therefore, the underground mine water treatment device for the coal mine is required to be developed, wherein the underground mine water treatment device is short in process flow, simple in structure, high in automation degree and capable of directly filtering without adding chemicals.

SUMMERY OF THE UTILITY MODEL

In order to achieve the purpose, the utility model provides a handle colliery of suspended solid mine water in pit and use pit water treatment facilities in pit, it has adopted following technical scheme:

a coal mine underground mine water treatment device comprises a sand settling box or a sand settling tank, a direct filtration unit, a concentration box or a concentration tank, a sludge dewatering unit, a cleaning unit and an automatic control unit; wherein, the direct filtration unit is arranged above the tank body, the mine water is pumped into the direct filtration unit by the lift pump, wherein, the direct filtration unit adopts a pressurized membrane separation technology, namely, under a preset pressure, a small molecular solute and a solvent pass through a PTFE film with a certain aperture, such as the aperture of 0.1 μm, and a large molecular solute cannot permeate and is remained on one side of the membrane.

The working principle of the utility model is as follows: in the direct filtration process, the water solution flows through the membrane surface under the push of pressure, the solvent (water) and the small molecular solute which are smaller than the membrane pores permeate the membrane to become purified water, and the solute and solute groups which are larger than the membrane pores in diameter are intercepted and discharged along with the water flow to become concentrated solution. The solute and solute groups are only deposited on the surface of the membrane in a limited way, the straight filtration rate is attenuated to a certain degree and tends to be balanced, and the filtering rate can be recovered by cleaning.

The utility model provides a colliery is pit with pit water treatment facilities in pit handles suspended solid mine water in the pit, has solved that current mine water process flow is longer, the structure is complicated, overall dimension is too big, and connecting line is long, and power consumption is big, need to add coagulant and flocculating agent and bring secondary pollution scheduling problem.

Description of the drawings:

fig. 1 is a structural diagram of a mine water treatment device for a coal mine underground according to an embodiment of the utility model.

Fig. 2 is a schematic diagram of an embodiment of a direct filtration unit in a mine water treatment device for a coal mine according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of an embodiment of a cleaning unit of a direct filtration unit in a mine water treatment device for a coal mine according to an embodiment of the present invention.

The specific implementation mode is as follows:

the mine water treatment device and the exemplary treatment method for the underground coal mine of the present invention will be described in detail with reference to the accompanying drawings and embodiments.

The embodiments described herein are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

According to some embodiments of the utility model, colliery is pit water treatment facilities in pit as shown in fig. 1, 2, include: a sand settling unit 10, a direct filtration unit 20, a concentration unit 30, a filter pressing unit 40, a cleaning unit 50, and an automatic control unit 60. Wherein the sand settling unit 10 is used for settling large particle pollutants in mine water, such as sand; the direct filtration unit is disposed above the sand settling unit in a height direction, and the mine water passing through the sand settling unit 10 may be pumped into the direct filtration unit 20 by the lift pump 70. In the present application, the direct filtration unit 20 may have a pressurized membrane separation configuration comprising a pressurized filtration membrane 24, such as a PTFE membrane, having a pore size such that the membrane passes small solutes and solvents smaller than the pore size, such as 0.1 μm, through the membrane to the effluent side 24B at a pressure such that large solutes larger than the pore size are not permeable and remain on the influent side 24A of the membrane.

The sand sediment unit 10 may have a sand sediment tank or a sand basin and corresponding pumps and piping.

The purified water produced by the direct filtration unit 20 flows to the purified water storage 22 through the water production pipe 21. The fresh water tank 22 may be disposed at a position lower than the unfiltered water tank 20 so that the fresh water naturally flows into the fresh water tank 22, or a pump 23 may be provided on the water pipe 21 if the difference in height between the fresh water tank and the unfiltered water tank does not allow the fresh water to naturally flow.

As shown in fig. 3, the cleaning unit 50 is coupled to the direct filtration unit 20, said cleaning unit 50 comprises an aeration scrubber subunit 51 and a backwash subunit 52, said aeration scrubber subunit 51 is coupled to the direct filtration unit via a cross flow valve, the aeration scrubber subunit comprises an air pump and a conduit, the air pump is coupled to said automatic control unit 60 and is configured to be switched on before or periodically during the start of water production to perform aeration scrubbing of the pressurized filtration membrane 24 from the water outlet side 24B during the water production. The backwash subunit 52 is coupled to the water production line of the straight filtration unit via a cross-flow valve and comprises a high pressure pump connected to a water and/or gas source, the high pressure pump being coupled to an automatic control unit 60 configured to periodically backwash the pressurized filtration membranes 24. The direct filtration unit 20 has a sewage pipe 25 coupled to the concentration unit 30, and the sewage pipe 25 is coupled with a sewage valve 26 for controlling the opening and closing of the sewage pipe. The blowoff valve is coupled to the automatic control unit 60, and is controlled by the automatic control unit 60 to be opened when the reverse water washing is performed and to be closed after the washing is completed.

The backwash subunit 52 for backwashing the straight filter unit 20 may include one or more of a gas backwash module for blowing gas into the filtered membrane filaments by compressed air to blow out contaminants clogged on the membrane filament pores, and a water backwash module. The water backwashing module utilizes a pump to pressurize and convey clean water in the clean water tank to the direct filtration unit, and performs water backwashing on the filtration membrane filaments in the direct filtration unit to flush out pollutants blocked on membrane filament holes of the PTFE membrane.

The back-water flushing of the direct filtration unit 20 results in a direct filtered back-wash water which is discharged via the sewer 25 to a concentration unit 30, e.g. a concentration basin 31 or a concentration tank, below the direct filtration unit 20.

The sludge in the thickening tank 31 of the thickening unit 30 is then sent to the filter press unit 40 coupled thereto, and the supernatant of the thickening tank is returned to the 10 grit chamber of the grit unit through the return pipe 32 for further filtration.

The filter press unit 40 may be, for example, a plate-and-frame filter press or a belt filter press, and dehydrates the sludge, and the dehydrated filtrate X is returned to the desilting pond of the sand setting unit 10 coupled thereto, and the sludge cake Y is transported outside.

The operation flow of the direct filtration unit 20 and the automatic control unit 60 is controlled as follows:

firstly, opening a cross flow valve, and pumping water to be filtered into the direct filtering unit 20 through a water inlet pump;

then, when the cross-flow water flows out of the equipment, starting aeration, scrubbing for a period of time such as 10s by aeration, and then stopping aeration;

then, the cross flow valve is closed, the water production valve is opened, and the running water yield and the concentrated water cross flow are adjusted through the flow regulating valve;

stopping water production by using the PTFE membrane for 10 minutes every time water is produced, opening a cross flow valve, and performing gas reaction for 10 seconds;

stopping water inflow, then aerating and cleaning for 10 seconds and 5 seconds, circularly aerating for 3 times, and producing water again;

after 3 cycles of water production, water reversal is started;

opening a blowoff valve, wherein 6 water producing branch pipes are arranged on the device, backwashing each water producing branch pipe according to water in sequence, and stopping for 8s after water in each water producing branch pipe is reversed for 15 s;

after backwashing and sewage discharging are completed, the equipment is fed with water again to produce water: .

The utility model discloses well must system has following characteristics:

1. the system flow is shortened, and the traditional technology of 'a grit chamber + a dosing reaction tank + a coagulation tank + a sedimentation tank + a sludge concentration tank + a filter pressing' is shortened into the technology of 'the grit chamber + the direct filtration + the concentration tank + the filter pressing'. The process units are reduced, and the civil engineering investment is saved.

2. The direct filtration unit is positioned above the tank body, so that the occupied area is saved, the number of pipelines is reduced, the power consumption is saved, and the investment cost is reduced.

3. Does not need to add chemicals, saves the cost of chemicals, improves the quality of produced water and reduces the water film pollution of advanced treatment mines.

4. The automation degree is high, and unattended operation can be realized.

The foregoing describes preferred embodiments of the present invention, but the spirit and scope of the present invention is not limited to the specific disclosure herein. Those skilled in the art can freely combine and expand the above-described embodiments in accordance with the teachings of the present invention to make further embodiments and applications within the spirit and scope of the present invention. The spirit and scope of the present invention are not to be limited by the specific embodiments but by the appended claims.

Claims (8)

1. A coal mine underground mine water treatment device is characterized in that: the device comprises a sand setting unit, a lifting pump and a direct filtering unit; the direct filtration unit is arranged above the sand setting unit, mine water is pumped into the direct filtration unit through a lifting pump, the direct filtration unit is provided with a pressurized membrane separation structure, and the pressurized filtration membrane is provided with a pore size which enables small-molecule solutes and solvents smaller than the pore size to pass through the membrane to the water outlet side and enables large-molecule solutes larger than the pore size not to pass through the membrane under a preset pressure.

2. The coal mine underground mine water treatment device according to claim 1, characterized in that: the clean water of direct filtration unit output flows to the clean water storehouse through producing the water pipe, the clean water storehouse sets up in the position that is less than the direct filtration unit to make the clean water can flow in the clean water storehouse naturally.

3. The coal mine underground mine water treatment device according to claim 1, characterized in that: the washing unit is coupled with the direct filtration unit and comprises an aeration scrubbing subunit and a backwashing subunit, the aeration scrubbing subunit is coupled with the direct filtration unit through a cross flow valve, the aeration scrubbing subunit comprises an air pump and a conduit, and the air pump is coupled with the automatic control unit and is configured to be started before water production begins or periodically to conduct aeration scrubbing on the pressurizing filtration membrane from the water outlet side in the water production process.

4. The coal mine underground mine water treatment device according to claim 3, characterized in that: the backwashing subunit is coupled with a water production pipe of the direct filtration unit through the cross-flow valve and comprises a high-pressure pump connected with a water source and/or a gas source, and the high-pressure pump is coupled with the automatic control unit and is configured to periodically backwash the pressurized filtration membrane.

5. The mine water treatment device for the underground coal mine according to claim 3 or 4, wherein: the backwash sub-unit comprises one or more of a gas backwash module and a water backwash module.

6. The mine water treatment device for the underground coal mine according to claim 3 or 4, wherein: the sewage treatment device is characterized by further comprising a concentration unit, the direct filtration unit is provided with a sewage pipe coupled to the concentration unit, the sewage pipe is coupled with a blow-down valve for controlling the blow-down pipe to be opened and closed, the blow-down valve is coupled to the automatic control unit, the automatic control unit controls the blow-down valve to be opened when the reverse water flushing is carried out, and the blow-down valve is closed after the flushing is finished.

7. The coal mine underground mine water treatment device according to claim 6, characterized in that: the sludge in the concentration tank of the concentration unit is then sent to a filter pressing unit coupled with the sludge, and the supernatant of the concentration tank flows back to the grit chamber of the grit unit through a return pipe for continuous filtration.

8. The coal mine underground mine water treatment device according to claim 7, characterized in that: the filter pressing unit is a plate-and-frame filter press or a belt filter press, sludge is dehydrated, filtrate obtained after dehydration flows back to a desilting pond of the sand setting unit coupled with the filter pressing unit, and obtained sludge cakes are transported outwards.

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