CN111732216A - Coal mine wastewater recycling system - Google Patents
Coal mine wastewater recycling system Download PDFInfo
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- CN111732216A CN111732216A CN202010729589.4A CN202010729589A CN111732216A CN 111732216 A CN111732216 A CN 111732216A CN 202010729589 A CN202010729589 A CN 202010729589A CN 111732216 A CN111732216 A CN 111732216A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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Abstract
The invention provides a coal mine wastewater recycling system, relates to the technical field of coal mine wastewater treatment, and solves the technical problem that a membrane filtration technology in the prior art cannot be applied to a special coal mine underground environment. The coal mine wastewater recycling system comprises reclaimed water recycling equipment, a water purification tank, a jigging screen and a raw water pool, wherein the water purification tank provides clean water for a drilling machine, underground wastewater enters the jigging screen, the jigging screen is positioned at the upstream of the raw water pool, and raw water passing through the jigging screen enters the raw water pool; the raw water tank is positioned at the upper stream of the reclaimed water recycling equipment, the raw water tank is connected with the reclaimed water recycling equipment, the reclaimed water recycling equipment is connected with the purified water tank, and the purified water tank is connected with a clean water supply pipeline under a coal mine. The jigging screen and the raw water pool remove fine particle impurities and coal slime in the wastewater in a filtering and precipitating way. And then, further filtering the wastewater by using reclaimed water reuse equipment to realize the purification of the coal mine wastewater. The purified clean water is used for underground operation, and the recycling of coal mine wastewater is realized.
Description
Technical Field
The invention relates to the technical field of coal mine wastewater treatment, in particular to a coal mine wastewater recycling system.
Background
Although the wastewater filtering technology is widely applied in various fields, the wastewater filtering technology is restricted by the special working environment of the underground coal mine and the diversity of coal mine wastewater components, and the wastewater filtering membrane in the prior art cannot be suitable for filtering the special environment of the underground coal mine and the coal mine wastewater, so that the treatment of the coal mine wastewater cannot be completed underground.
In the prior art, underground coal mine wastewater needs to be transferred five times, specifically from a water consumption point to a panel water sump, then from the panel water sump to a main water sump, then from the main water sump to an industrial water plant, finally from the industrial water plant to a ground water tank, and through flocculating and precipitating by a flocculating agent in a ground sewage station, clear water is purified by an RO system and then returns to the underground water consumption point, and slime water is sent to a coal washery for treatment.
The existing coal mine wastewater treatment method at least has the following defects:
1. the water supply amount in the pit is insufficient, and the production is influenced.
2. The underground equipment often has the phenomenon of water waiting for shutdown, and the production progress is restricted. Causing the pressure in the downhole drainage system to increase.
3. The treatment cost is high: after five times of transferring, the water treatment cost is very high, about 6-8 yuan/m3Left and right. The construction cost is high, the engineering quantity is large: the installation work amount of water supply and drainage pipelines and the construction work amount of drainage bins are large.
4. Has hidden trouble in the aspect of environmental protection, and the treatment cost is very high: to treat the coal slurry, the RO reverse osmosis system produces a large amount of heavy brine daily, and although a portion of the coal washery is available, 60% of the biological heavy brine still needs to be discharged or treated. If the emission is direct, the environmental protection policy is violated; if the treatment is carried out, the cost is higher, and specifically, the cost of treating each ton of water is 25-45 yuan.
Disclosure of Invention
One of the purposes of the invention is to provide a coal mine wastewater recycling system, which solves the technical problem that coal mine wastewater cannot be recycled underground in the prior art. Advantageous effects can be achieved in preferred embodiments of the present invention, as described in detail below.
In order to achieve the purpose, the invention provides the following technical scheme:
the coal mine wastewater recycling system comprises reclaimed water recycling equipment, a water purification tank, a jigging screen and a raw water pool, wherein the water purification tank provides clean water for a drilling machine, underground wastewater enters the jigging screen, the jigging screen is positioned at the upstream of the raw water pool, and the raw water passing through the jigging screen enters the raw water pool; the raw water tank is positioned at the upper stream of the reclaimed water recycling equipment, the raw water tank is connected with the reclaimed water recycling equipment, the reclaimed water recycling equipment is connected with the purified water tank, and the purified water tank is connected with a clean water supply pipeline under a coal mine.
According to a further preferable technical scheme of the invention, an under-sieve pool is arranged below the jigging sieve, the under-sieve pool is connected with the raw water pool through a trench, and the depth of the trench is gradually increased from the under-sieve pool to the raw water pool so as to form a slope direction from the under-sieve pool to the raw water pool.
The coal mine wastewater recycling system further comprises a mud accumulation hopper, the mud accumulation hopper comprises a mud blocking plate, the height of the mud blocking plate is smaller than the depth of the trench, when the mud accumulation hopper is placed in the trench, the mud blocking plate is placed along the width direction of the trench, and liquid in the trench impacts the mud blocking plate and flows over the mud blocking plate.
According to a further preferred embodiment of the present invention, the raw water tank includes a partition wall, the partition wall is located in the raw water tank to divide the raw water tank into a first raw water zone and a second raw water zone, and the height of the partition wall is lower than the tank edge of the raw water tank.
According to a further preferable technical scheme of the invention, the first raw water area is connected with a sewage discharge outlet of the filter tank, the second raw water area is positioned at the downstream of the first raw water area, and the second raw water area is connected with a raw water port of the reclaimed water reuse equipment.
According to a further preferred technical scheme, the reclaimed water recycling equipment comprises a filter box, a water production pipeline, a backwashing pipeline, a switching valve group and a pneumatic control unit, wherein the water production pipeline and the backwashing pipeline are connected with a clean water outlet of the filter box, the water production pipeline is used for discharging filtered clean water, and the backwashing pipeline is used for injecting cleaning liquid and/or air into the filter box to clean the filter box; the switching valve group is positioned on the water production pipeline and the backwashing pipeline and is connected with the pneumatic control unit.
According to a further preferred technical scheme of the invention, the water production pipeline is provided with a hydrodynamic pump and a water production switching valve. The backwashing pipeline comprises a gas backwashing pipeline and/or a water backwashing pipeline, and a gas backwashing switching valve is arranged on the gas backwashing pipeline. And a water backwashing switching valve and a liquid power pump are arranged on the water backwashing pipeline.
According to a further preferred technical scheme, the pneumatic control unit further comprises a water production equipment air supply pipeline, a backwashing equipment air supply pipeline and a valve switching control pipeline, the water production equipment air supply pipeline and the backwashing equipment air supply pipeline are connected with the air source part, and the valve switching control pipeline is connected with the water production equipment air supply pipeline and/or the backwashing equipment air supply pipeline so as to provide compressed air for the valve switching control pipeline through the water production equipment air supply pipeline and/or the backwashing equipment air supply pipeline.
According to a further preferred technical scheme of the invention, a water production equipment air supply pipeline is connected with a hydraulic power pump on a water production pipeline; the backwashing equipment air supply pipeline comprises an air backwashing equipment air supply pipeline and/or a water backwashing equipment air supply pipeline; the air supply pipeline of the air backwashing equipment is connected with the air backwashing pipeline, and the air supply pipeline of the water backwashing equipment is connected with the liquid power pump on the water backwashing pipeline. The valve switching control pipeline is connected with the water production switching valve, the water backwashing switching valve and/or the gas backwashing switching valve.
According to a further preferred technical scheme of the invention, the water production equipment air supply pipeline comprises a water production automatic pneumatic control pipeline, the water backwashing equipment air supply pipeline comprises a water backwashing automatic pneumatic control pipeline, the pneumatic control unit further comprises a gas circuit switching controller, and the water production automatic pneumatic control pipeline and the water backwashing automatic pneumatic control pipeline are connected with the air source part through the gas circuit switching controller.
According to a further preferred technical scheme of the invention, the water production equipment air supply pipeline also comprises a water production manual pneumatic control pipeline; the air supply pipeline of the water backwashing equipment also comprises a water backwashing manual pneumatic control pipeline. The pneumatic control unit also comprises a pneumatic control pipeline for gas backwashing and manual operation. The water production manual pneumatic control pipeline is connected with the water production pipeline. The pneumatic control pipeline for air backwashing is connected with the pneumatic control pipeline for air backwashing, and the manual pneumatic control pipeline for water backwashing is connected with the water backwashing pipeline. The water production manual pneumatic control pipeline, the air backwashing manual pneumatic control pipeline and the water backwashing manual pneumatic control pipeline all comprise basic valves and control buttons, and the control buttons are connected with the basic valves.
According to a further preferred technical scheme of the invention, the filter box comprises a flat ceramic membrane and an aerator pipe, the flat ceramic membrane comprises a filtrate hole, and the filtrate hole is connected with the clear water outlet. The aeration pipe is located the bottom of rose box and on the rose box inside wall.
According to a further preferred embodiment of the invention, the water backwash line is connected to the clean water tank.
The reclaimed water recycling equipment provided by the invention at least has the following beneficial technical effects:
the coal mine wastewater recycling system provided by the method removes solid large-particle impurities in coal mine wastewater by arranging the jigging screen. And further carrying out precipitation by using a raw water pond to remove fine particle impurities and coal slime in the wastewater. And further filtering the precipitated wastewater by using reclaimed water reuse equipment to realize the purification of the coal mine wastewater. The purified clean water is further used for underground operation, such as cooling of a drilling machine, so that the recycling of coal mine wastewater is realized, the coal mine wastewater treatment cost is reduced, and the mining cost is saved.
In addition, the preferred technical scheme of the invention can also produce the following technical effects:
according to the preferable technical scheme, the mud accumulation hopper is arranged in the trench, so that silt and/or coal slag in the raw water can be better precipitated before entering the raw water pool.
The reclaimed water recycling equipment adopting the preferred technical scheme of the invention adopts the filter box to filter the coal mine wastewater in an external pressure internal suction mode, and can effectively improve the filtering efficiency of the coal mine wastewater. And through setting up the backwash pipeline, simplify the cleaning operation of rose box, shortened rose box cleaning time, and then can increase the washing number of times in the same time in order to maintain the maximum flux of rose box, and then maintain the filtration efficiency of rose box at diversified composition. And the water production pipeline and the backwashing pipeline are controlled by the pneumatic control unit, so that the underground explosion caused by sparks generated by the reclaimed water recycling equipment in the using process can be effectively prevented, the aim of explosion prevention is fulfilled, and the underground explosion-proof device is further suitable for the underground explosive environment.
According to the preferred technical scheme, the pneumatic control unit is provided with the water production equipment air supply pipeline and the backwashing equipment air supply pipeline to respectively provide compressed air for the water production pipeline and the backwashing pipeline so as to control the working states of the water production pipeline and the backwashing pipeline. According to a further preferred scheme, the gas circuit switching controller, the time delay unit and the long timer are arranged, so that switching between the gas supply pipeline of the water production equipment and the gas supply pipeline of the backwashing equipment is realized, further, the working states of the gas supply pipeline of the water production equipment and the gas supply pipeline of the backwashing equipment are switched, the timed automatic switching between the water production state and the backwashing state of the reclaimed water recycling equipment is realized, and the automatic control of water production and backwashing of the reclaimed water recycling equipment is realized.
According to the air control unit of the preferred technical scheme, the water production manual air control pipeline, the air backwashing manual air control pipeline and the water backwashing manual air control pipeline are arranged, so that two control modes of the reclaimed water recycling equipment are realized, namely, when the pipeline for automatically controlling and switching the water production and backwashing of the reclaimed water recycling equipment fails, the manual control of switching the water production and backwashing of the reclaimed water recycling equipment is adopted, the shutdown of the reclaimed water recycling equipment is avoided, and the time is won for the maintenance of the pipeline for automatically controlling and switching the water production and backwashing of the reclaimed water recycling equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a filtration tank according to a preferred embodiment of the present invention;
FIG. 2 is a schematic view of a water circuit of a water reuse apparatus according to a first preferred embodiment of the present invention;
FIG. 3 is a schematic view of a water circuit of a reclaimed water reusing device in accordance with a second preferred embodiment of the present invention;
FIG. 4 is a schematic view of the air path control of the reclaimed water reusing equipment according to the first preferred embodiment of the present invention;
FIG. 5 is a schematic view of the air path control of the reclaimed water reusing equipment according to the second preferred embodiment of the present invention;
FIG. 6 is a schematic representation of a planar ceramic membrane according to a preferred embodiment of the present invention;
FIG. 7 is a layout diagram of a coal mine wastewater recycling system according to a preferred embodiment of the present invention;
FIG. 8 is an elevation view of a coal mine wastewater recycling system in accordance with a preferred embodiment of the present invention;
FIG. 9 is a flow diagram of a coal mine wastewater recycling system in accordance with a preferred embodiment of the present invention;
FIG. 10 is a flow diagram of a coal mine wastewater recycling system in accordance with a preferred embodiment of the present invention;
FIG. 11 is a schematic view of a raw water basin in accordance with a preferred embodiment of the present invention;
FIG. 12 is a schematic view of a mud bucket of a preferred embodiment of the present invention placed in a trench;
FIG. 13 is a schematic view of a mud bucket according to a first preferred embodiment of the present invention;
fig. 14 is a schematic view of a mud bucket according to a second preferred embodiment of the present invention.
In the figure: 10-a filter box; 101-clear water outlet; 102-a flat ceramic membrane; 1021-filtrate well; 103-an aerator pipe; 104-raw water port; 105-a sewage draining outlet; 11-a water production pipeline; 111-a hydrodynamic pump; 112-water production switching valve; 12-gas backwash line; 121-gas backwash switching valve; 13-water backwash line; 131-water backwash switching valve; 14-a water production equipment gas supply line; 141-automatic pneumatic control pipeline for water production; 15-gas path switching controller; 16-a time delay; 17-long timer; 18-a gas supply member; 19-water backwash equipment air supply line; 191-water backwashing automatic pneumatic control pipeline; 20-water production manual pneumatic control pipeline; 201-a base valve; 202-control buttons; 203-manual switching valve; 21-air backwashing manual pneumatic control pipeline; 22-water backwash manual pneumatic control pipeline; 23-reclaimed water recycling equipment; 24-a purified water tank; 25-jigging sieve; 26-a raw water pool; 261-partition wall; 262-a first raw water zone; 263-second raw water zone; 27-a two-position five-way valve; 28-a drilling machine; 29-valve switching control line; 30-mud collecting hopper; 301-mud blocking plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Referring to fig. 7 to 10, the coal mine wastewater recycling system according to a preferred embodiment of the present invention includes a reclaimed water recycling apparatus 23, a clean water tank 24, a jigging screen 25 and a raw water tank 26, wherein the clean water tank 24 provides clean water for a drilling machine, and the underground wastewater enters the jigging screen 25, the jigging screen 25 is located at the upstream of the raw water tank 26, and the raw water passing through the jigging screen 25 enters the raw water tank 26; the raw water tank 26 is positioned at the upstream of the reclaimed water reuse equipment 23, the raw water tank 26 is connected with the reclaimed water reuse equipment 23, the reclaimed water reuse equipment 23 is connected with the purified water tank 24, and the purified water tank 24 is connected with a coal mine underground clear water supply pipeline.
In a preferred embodiment, the reclaimed water reusing device 23 includes a raw water port 104. More preferably, the raw water tank 26 is connected to the raw water port 104.
It is further preferable that the reclaimed water reusing device 23 is connected to the clean water tank 24 through the produced water line 11 so that clean water produced by filtration through the reclaimed water reusing device 23 can be introduced into the clean water tank 24.
Referring to fig. 8, as a further preferred embodiment of the present invention, an undersize pool is provided below the jigging screen 25, the undersize pool is connected to the raw water pool 26 by a trench, and the depth of the trench gradually increases from the undersize pool to the raw water pool 26 to form a slope of the undersize pool to the raw water pool 26. Preferably, the trench is disposed along the edge of the downhole formation. Further preferably, the width of the trench along the wall of the tunnel is 0.4 m, and the depth of the trench along the wall of the tunnel is 0.1 m to 0.2 m. Specifically, wastewater in the undersize pond overflows into the trench and flows along the trench into the raw water pond 26. Further preferably, a coal slime cleaning area is arranged in front of the jigging screen 25, so that an operator can clean coal slime deposited in a screen drainage basin below the jigging screen 25.
Referring to fig. 12 to 14, the coal mine wastewater recycling system according to a further preferred embodiment of the present invention further includes a mud collection bucket 30, the mud collection bucket 30 includes a mud blocking plate 301, the height of the mud blocking plate 301 is smaller than the depth of the trench, when the mud collection bucket 30 is placed in the trench, the mud blocking plate 301 is placed in the width direction of the trench, and the liquid in the trench impacts on the mud blocking plate 301 and flows over the mud blocking plate 301.
Preferably, the width of the mud collection bucket 30 is matched with the width of the trench. Specifically, place long-pending mud fill 30 in the trench for the mud board 301 that hinders among the long-pending mud fill 30 can block and slow down the velocity of water flow, makes impurity such as silt, cinder in the waste water can deposit in long-pending mud fill 30. Further preferably, the mud collecting bucket 30 is provided with a lifting handle so that the operator can lift and/or place the mud collecting bucket 30 into the trench.
Referring to fig. 7 to 11, the raw water tank 26 includes a partition wall 261, the partition wall 261 is located in the raw water tank 26 to divide the raw water tank 26 into a first raw water zone 262 and a second raw water zone 263, and the height of the partition wall 261 is lower than the tank edge of the raw water tank 26. During water production, wastewater enters the first raw water area 262 from the jigging screen 25 along the trench, is precipitated again through the first raw water area 262, overflows to the second raw water area 263 from the upper part of the partition wall 261, and is precipitated again in the second raw water area 263, so that the impurity content of the pond II clear solution layer is ensured to be lower than 12 g/l. It is further preferred that a submersible sewage pump be provided in the first raw water area 262 to transport the fine particle coal slurry in the first raw water area 262 to the other location.
Referring to fig. 9 to 11, as a further preferred embodiment of the present invention, the first raw water zone 262 is connected to the sewage drain 105 of the filtering tank 10, the second raw water zone 263 is located downstream of the first raw water zone 262, and the second raw water zone 263 is connected to the raw water port 104 of the reclaimed water reusing device 23.
Preferably, the first raw water zone 262 is connected to the sewage discharge outlet 105 of the filtering tank 10 through a trench so that the sewage filtered by the filtering tank 10 enters the first raw water zone 262.
In a preferred embodiment, the second raw water zone 263 is located downstream of the first raw water zone 262, and the second raw water zone 263 is connected to the raw water port 104 of the reclaimed water reusing device 23. Further preferably, a submersible sewage pump is arranged in the second raw water area 263 to send the wastewater in the second raw water area 263 to the reclaimed water recycling equipment 23.
Referring to fig. 1 to 5, a reclaimed water recycling apparatus 23 according to a preferred embodiment of the present invention includes a filter tank 10, a produced water pipeline 11, a backwash pipeline, a switching valve set, and a pneumatic control unit, wherein the produced water pipeline 11 and the backwash pipeline are connected to a clean water outlet 101 of the filter tank 10, the produced water pipeline 11 is used for discharging filtered clean water, and the backwash pipeline is used for injecting cleaning liquid and/or air into the filter tank 10 to clean the filter tank 10; the switching valve group is positioned on the water production pipeline 11 and the backwashing pipeline and is connected with the pneumatic control unit.
Referring to fig. 2 and 3, as a preferred embodiment of the present invention, a fluid power pump 111 and a water production switching valve 112 are provided on the water production line 11. The backwashing pipeline comprises a gas backwashing pipeline 12 and/or a water backwashing pipeline 13, and a gas backwashing switching valve 121 is arranged on the gas backwashing pipeline 12; the water backwash pipeline 13 is provided with a water backwash switching valve 131 and a hydrodynamic pump 111.
The reclaimed water reuse equipment 23 described in the above preferred embodiment is provided with the hydrodynamic pump 111 on the produced water pipeline 11, so that the filter box 10 is filtered by adopting an external pressure and internal suction mode, and the filtering rate of the coal mine wastewater can be effectively improved. Preferably, the filtration negative pressure in the filtration tank 10 is less than 0.4bar, and when the filtration negative pressure in the filtration tank 10 is greater than and/or equal to 0.4bar, the water production operation needs to be stopped, and the device needs to be cleaned, and preferably, chemical cleaning can be adopted. Further preferred scheme is through setting up the backwash pipeline, when wasing rose box 10 again, only need through backwash pipeline to inject washing liquid or compressed air in the rose box 10, just can realize the washing of rose box 10, has simplified the cleaning operation of rose box 10, has shortened rose box 10 scavenging period, and then avoids leading to the filtration rate to reduce because of the branch is various in the colliery waste water. Preferably, the air supply member 18 is a device or conduit capable of providing compressed air. It is further preferred that the air supply member 18 is a compressed air filter connected to a down-hole compressed air line to prevent impurities in the compressed air from entering the air control device. Specifically, the air supply unit 18 may be connected to an air compressor. Further preferably, the air supply unit 18 may be connected to an air tank storing compressed air.
Referring to fig. 3, as a preferred embodiment, the backwash line includes a gas backwash line 12 and a water backwash line 13. More preferably, the water backwash line 13 and the water production line 11 share the same or a plurality of hydrodynamic pumps 111. Further preferably, the water inlet and the water outlet of the hydrodynamic pump 111 are both connected with the pipelines in the gas backwashing pipeline 12 and the water backwashing pipeline 13, and the gas backwashing pipeline 12 and the water backwashing pipeline 13 at the two ends of the water inlet and the water outlet of the hydrodynamic pump 111 are respectively provided with a water production switching valve 112 and a water backwashing switching valve 131, so that the switching of the pipeline where the hydrodynamic pump 111 is located is realized through the on-off of the water production switching valve 112 and the water backwashing switching valve 131.
Specifically, the inlet of the hydrodynamic pump 111 is connected to the filter box 10 via a pipe in the water production line 11. A water production switching valve 112 is provided between the water inlet of the hydrodynamic pump 111 and the filter tank 10, and the water production switching valve 112 is opened when water production work is performed. When the backwashing operation is performed, the produced water switching valve 112 is closed. It is further preferred that the water inlet of the hydrodynamic pump 111 is connected to the vessel for storing the cleaning liquid and/or the pipeline for supplying the cleaning liquid through a pipe in the water backwash pipeline 13, and a water backwash switching valve 131 is provided between the water inlet of the hydrodynamic pump 111 and the vessel for storing the cleaning liquid and/or the pipeline for supplying the cleaning liquid. The water backwash changeover valve 131 is opened when water backwash operation is performed, and the water backwash changeover valve 131 is closed when gas backwash or water production operation is performed. More preferably, the outlet of the hydrodynamic pump 111 is connected to the clean water tank 24 through a pipe in the water production line 11, and a water production switching valve 112 is provided in the pipe between the outlet of the hydrodynamic pump 111 and the clean water tank 24, and the water production switching valve 112 is opened during the water production operation and the water production switching valve 112 is closed during the water backwashing operation. More preferably, the water outlet of the hydrodynamic pump 111 is connected to the filtration tank 10 through a pipe in the water backwash line 13, and a water backwash switching valve 131 is provided in the pipe, and the water backwash switching valve 131 is opened during the water backwash operation and the water backwash switching valve 131 is closed during the water production operation or the gas backwash operation.
In another preferred embodiment, separate hydrodynamic pumps 111 are used for the water backwash line 13 and the water production line 11. More preferably, the hydrodynamic pump 111 is air driven. In a preferred embodiment, the hydrodynamic pump 111 is a gas-driven hydraulic pump. Preferably, the gas backwash switching valve 121, the water backwash switching valve 131, and the water production switching valve 112 are pneumatic control valves.
Referring to fig. 2 and 3, as a preferred embodiment, the reclaimed water reuse apparatus 23 is further provided with a backup hydrodynamic pump 111.
Referring to fig. 1 and 6, as a further preferred embodiment of the present invention, the filter box 10 includes a flat ceramic membrane 102 and an aeration tube 103. It is further preferred that the flat ceramic membrane 102 comprises filtrate holes 1021, and that the filtrate holes 1021 are connected to the clean water outlet 101. It is further preferred that aeration pipe 103 is located at the bottom of filter tank 10 and on the inner side wall of filter tank 10. It is further preferred that aerator pipe 103 is connected to a down-hole compressed air pipe.
In the preferred embodiment, the filter box 10 employs a flat ceramic membrane 102 to filter coal mine wastewater. Preferably, the flat ceramic membrane 102 is made of inorganic ceramic, and the raw material is acid-base-resistant, high-temperature-resistant and chemically stable in an extreme environment, so that the filter box 10 can filter waste liquid with a pH value of 5-9, and the energy consumption of the flat ceramic membrane 102 in operation can be reduced. Moreover, the flat ceramic membrane 102 has strong anti-pollution capability, and can resist chemical agents with higher concentration and mechanical cleaning with higher strength, so that the cleaning effect is more thorough. For an organic filtering membrane, the membrane inevitably suffers pollution in the operation process, the membrane flux is reduced, and the main reasons of short service life are that the membrane aperture is enlarged and the membrane is aged in the membrane cleaning process. Maintaining the flux and pore size stability of the membrane is therefore critical to membrane fouling resistance. The flat ceramic membrane 102 is made of ceramic, so that the defects are overcome, and elastic deformation cannot occur due to increase of backwashing pressure and times.
In the preferred embodiment, the aeration pipe 103 is arranged in the filter box 10, which is beneficial to turning and/or creeping of the wastewater to be filtered in the filter box 10, so that fine particles in the wastewater are prevented from depositing on the flat ceramic membrane 102 and/or on the side wall of the filter box 10, membrane holes on the flat ceramic membrane 102 are prevented from being blocked, and the service life of the flat ceramic membrane 102 after single cleaning is prolonged. It is further preferred that the aeration pipe 103 is located below the flat ceramic membrane 102. Further, aeration pipe 103 is also provided along the bottom sidewall edge of filter box 10.
Referring to fig. 4 and 5, as a further preferred embodiment, the pneumatic control unit further includes a water production equipment air supply line 14, a backwashing equipment air supply line and a valve switching control line 29, the water production equipment air supply line 14 and the backwashing equipment air supply line are connected with the air source unit 18, and the valve switching control line 29 is connected with the water production equipment air supply line 14 and/or the backwashing equipment air supply line so as to provide compressed air for the valve switching control line 29 through the water production equipment air supply line 14 and/or the backwashing equipment air supply line.
As a further preferred embodiment, the water production plant gas supply line 14 is connected to a hydrodynamic pump 111 on the water production line 11; the backwash equipment air supply line comprises an air backwash equipment air supply line and/or a water backwash equipment air supply line 19. Preferably, the air supply line of the air backwashing device is connected with the air backwashing line 12, and the air supply line 19 of the water backwashing device is connected with the liquid power pump 111 on the water backwashing line 13. The preferred valve switching control line 29 is connected to the product water switching valve 112, the water backwash switching valve 131 and/or the gas backwash switching valve 121.
Referring to fig. 10, as a preferred embodiment of the present invention, a water backwash line 13 is connected to a clean water tank 24. The water backwashing pipeline 13 is connected with the water purification tank 24, and the cleaning of the reclaimed water recycling equipment 23 can utilize the clear water after the wastewater is filtered, so that the wastewater can be recycled.
Referring to fig. 9, as another preferred embodiment of the present invention, the coal mine wastewater recycling system further includes a chemical cleaning tank. Further preferably, the chemical cleaning tank is connected with a reclaimed water recycling device 23 through a water backwashing pipeline 13. Preferably, the chemical cleaning tank is used to store a chemical cleaning agent for cleaning the filter tank 10 and the flat ceramic membranes therein with the chemical cleaning agent.
Referring to fig. 4 and 5, as a preferred embodiment, the water production equipment air supply line 14 comprises a water production automatic air control line 141, the water backwashing equipment air supply line 19 comprises a water backwashing automatic air control line 191, the air control unit further comprises an air path switching controller 15, the water production automatic air control line 141 and the water backwashing automatic air control line 191 are connected with the air source part 18 through the air path switching controller 15, and the air path switching controller 15 switches the on-off state of the water production automatic air control line 141 and the backwashing equipment air supply line.
Preferably, the gas circuit switching controller 15 comprises a time delay 16 and a long timer 17 and a gas-controlled two-position five-way valve 27, and the time delay 16 and the long timer 17 are connected with the gas-controlled two-position five-way valve 27 so as to control the gas-controlled two-position five-way valve 27 to switch the on-off states of the automatic gas control pipeline 141 for producing water and the gas supply pipeline for backwashing equipment through the time delay 16 and the long timer 17.
Referring to fig. 5, as a preferred embodiment, the valve switching control pipeline 29 is connected to the water backwashing equipment air supply pipeline 19, and the produced water switching valve 112 is a normally open air control valve, that is, the valve switching control pipeline 29 is in an open state when not ventilating the produced water switching valve 112; the valve switch control line 29 is closed when it is venting the product water switch valve 112. The water backwash switching valve 131 is a normally closed air control valve, that is, the valve switching control line 29 is opened when the water backwash switching valve 131 is ventilated, and the valve switching control line 29 is closed when the water backwash switching valve 131 is not ventilated.
In another preferred embodiment, the valve switching control pipeline 29 is connected to the water production manual pneumatic control pipeline 20, the water production switching valve 112 is a normally closed pneumatic control valve, and the water backwashing switching valve 131 is a normally open pneumatic control valve.
Referring to fig. 4 and 5, as a further preferred embodiment, the water production facility gas supply line 14 is connected to a hydrodynamic pump 111 on the water production line 11; the backwashing equipment air supply pipeline comprises an air backwashing equipment air supply pipeline and/or a water backwashing equipment air supply pipeline 19; the air supply pipeline of the air backwashing equipment is connected with the air backwashing pipeline 12, and the air supply pipeline 19 of the water backwashing equipment is connected with the liquid power pump 111 on the water backwashing pipeline 13. Further preferably, the valve switching control line 29 is connected to the produced water switching valve 112 and the water backwash switching valve 131.
As another preferred embodiment, the valve switching control line 29 is connected to the product water switching valve 112, the water backwash switching valve 131, and the gas backwash switching valve 121 to achieve automatic gas backwash of the apparatus.
In a preferred embodiment, the product water switch valve 112, the gas backwash switch valve 121 and the water backwash switch valve 131 are all pneumatically controlled valves.
Referring to fig. 4 and 5, as a further preferred embodiment, the water production facility gas supply line 14 further comprises a water production manual pneumatic control line 20; the water backwashing equipment air supply pipeline 19 also comprises a water backwashing manual pneumatic control pipeline 22; the pneumatic control unit also comprises a pneumatic backwashing manual pneumatic control pipeline 21, and a water production manual pneumatic control pipeline 20 is connected with the water production pipeline 11; the pneumatic control pipeline 21 for air backwashing is connected with the pneumatic control pipeline 12 for air backwashing, and the manual pneumatic control pipeline 22 for water backwashing is connected with the water backwashing pipeline 13. And the water production manual pneumatic control pipeline 20, the pneumatic backwashing manual pneumatic control pipeline 21 and the water backwashing manual pneumatic control pipeline 22 all comprise a basic valve 201 and a control button 202, and the control button 202 is connected with the basic valve 201. Preferably, the pneumatic control unit further comprises a manual switching valve 203, and the water production manual pneumatic control pipeline 20, the pneumatic backwashing manual pneumatic control pipeline 21, the water backwashing manual pneumatic control pipeline 22 and the pneumatic circuit switching controller 15 are connected with the gas source part 18 through the manual switching valve 203.
Further preferably, the reclaimed water reusing device 23 further comprises a pressure gauge and a flow meter to detect the negative pressure and the flow rate of the clean water filtered in the filter tank 10, and determine the working state of the filter tank 10 by the negative pressure and the flow rate of the filtered water, and monitor the working state of the filter tank 10 by the filter tank 10.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The coal mine wastewater recycling system is characterized by comprising reclaimed water recycling equipment (23), a water purifying tank (24), a jigging screen (25) and a raw water pool (26), wherein the water purifying tank (24) provides clean water for a drilling machine, underground wastewater enters the jigging screen (25), the jigging screen (25) is positioned at the upstream of the raw water pool (26), and raw water passing through the jigging screen (25) enters the raw water pool (26); former pond (26) are located the upper reaches of reuse of reclaimed water equipment (23), just former pond (26) with reuse of reclaimed water equipment (23) are connected, reuse of reclaimed water equipment (23) with water purification case (24) are connected, water purification case (24) are connected with colliery clear water supply pipeline in the pit.
2. The coal mine wastewater recycling system according to claim 1, wherein an undersize pool is arranged below the jigging screen (25), the undersize pool is connected with the raw water pool (26) through a trench, and the depth of the trench is gradually increased from the undersize pool to the raw water pool (26) to form a slope direction from the undersize pool to the raw water pool (26).
3. The coal mine wastewater recycling system according to claim 2, further comprising a mud collection bucket (30), wherein the mud collection bucket (30) comprises a mud blocking plate (301), the height of the mud blocking plate (301) is smaller than the depth of the trench, when the mud collection bucket (30) is placed in the trench, the mud blocking plate (301) is placed along the width direction of the trench, and liquid in the trench impacts on the mud blocking plate (301) and overflows through the mud blocking plate (301).
4. The coal mine wastewater recycling system of claim 1, wherein the raw water basin (26) comprises a partition wall (261), the partition wall (261) is positioned in the raw water basin (26) to divide the raw water basin (26) into a first raw water zone (262) and a second raw water zone (263), and the height of the partition wall (261) is lower than the edge of the raw water basin (26).
5. The coal mine wastewater recycling system according to claim 8, wherein the first raw water zone (262) is connected to a sewage discharge port (105) of the filter tank (10), the second raw water zone (263) is located downstream of the first raw water zone (262), and the second raw water zone (263) is connected to a raw water port (104) of the reclaimed water reusing device (23).
6. The coal mine wastewater recycling system according to any one of claims 1 to 5, wherein the reclaimed water recycling equipment (23) comprises a filter tank (10), a water production pipeline (11), a backwashing pipeline, a switching valve set and a pneumatic control unit,
the water production pipeline (11) and the backwashing pipeline are connected with a clean water outlet (101) of the filter tank (10), the water production pipeline (11) is used for discharging filtered clean water, and the backwashing pipeline is used for injecting cleaning liquid and/or air into the filter tank (10) to clean the filter tank (10);
the switching valve group is located on the water production pipeline (11) and the backwashing pipeline and connected with the pneumatic control unit.
7. The coal mine wastewater recycling system according to claim 6, wherein the water production pipeline (11) is provided with a hydrodynamic pump (111) and a water production switching valve (112);
the backwashing pipeline comprises a gas backwashing pipeline (12) and/or a water backwashing pipeline (13), and a gas backwashing switching valve (121) is arranged on the gas backwashing pipeline (12); and a water backwashing switching valve (131) and a hydraulic power pump (111) are arranged on the water backwashing pipeline (13).
8. The coal mine wastewater recycling system according to claim 7, wherein the pneumatic control unit further comprises a water production equipment air supply line (14), a backwashing equipment air supply line and a valve switching control line (29),
the water production equipment gas supply pipeline (14) and the backwashing equipment gas supply pipeline are connected with a gas source part (18), and the valve switching control pipeline (29) is connected with the water production equipment gas supply pipeline (14) and/or the backwashing equipment gas supply pipeline so as to provide compressed gas for the valve switching control pipeline (29) through the water production equipment gas supply pipeline (14) and/or the backwashing equipment gas supply pipeline;
the water production equipment gas supply pipeline (14) is connected with a liquid power pump (111) on the water production pipeline (11); the backwashing equipment air supply pipeline comprises an air backwashing equipment air supply pipeline and/or a water backwashing equipment air supply pipeline (19); the gas backwashing equipment gas supply pipeline is connected with the gas backwashing pipeline (12), and the water backwashing equipment gas supply pipeline (19) is connected with a liquid power pump (111) on the water backwashing pipeline (13);
the valve switching control pipeline (29) is connected with the water production switching valve (112), the water backwashing switching valve (131) and/or the gas backwashing switching valve (121).
9. The coal mine wastewater recycling system according to claim 8, wherein the water production equipment air supply pipeline (14) comprises a water production automatic pneumatic control pipeline (141), the water backwashing equipment air supply pipeline (19) comprises a water backwashing automatic pneumatic control pipeline (191), the pneumatic control unit further comprises a gas circuit switching controller (15), and the water production automatic pneumatic control pipeline (141) and the water backwashing automatic pneumatic control pipeline (191) are connected with the gas source piece (18) through the gas circuit switching controller (15).
10. The coal mine wastewater recycling system of claim 9, wherein the water production equipment air supply line (14) further comprises a water production manual pneumatic control line (20); the water backwashing equipment air supply pipeline (19) also comprises a water backwashing manual pneumatic control pipeline (22); the pneumatic control unit also comprises a pneumatic control pipeline (21) for air backwashing and manual operation,
the water production manual pneumatic control pipeline (20) is connected with the water production pipeline (11); the gas backwashing manual pneumatic control pipeline (21) is connected with the gas backwashing pipeline (12), and the water backwashing manual pneumatic control pipeline (22) is connected with the water backwashing pipeline (13);
and the water production manual pneumatic control pipeline (20), the pneumatic backwashing manual pneumatic control pipeline (21) and the water backwashing manual pneumatic control pipeline (22) respectively comprise a basic valve (201) and a control button (202), and the control button (202) is connected with the basic valve (201).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010729589.4A CN111732216A (en) | 2020-07-27 | 2020-07-27 | Coal mine wastewater recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010729589.4A CN111732216A (en) | 2020-07-27 | 2020-07-27 | Coal mine wastewater recycling system |
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| CN111732216A true CN111732216A (en) | 2020-10-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112897720A (en) * | 2021-01-19 | 2021-06-04 | 中煤科工集团重庆研究院有限公司 | Mining drilling flushing fluid slag-water separation and wastewater recycling system and method |
| CN112897723A (en) * | 2021-01-25 | 2021-06-04 | 李进虎 | Mine water underground treatment process |
| CN113818824A (en) * | 2021-09-16 | 2021-12-21 | 中煤科工集团重庆研究院有限公司 | Pneumatic movable mining drilling flushing fluid recycling device |
-
2020
- 2020-07-27 CN CN202010729589.4A patent/CN111732216A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112897720A (en) * | 2021-01-19 | 2021-06-04 | 中煤科工集团重庆研究院有限公司 | Mining drilling flushing fluid slag-water separation and wastewater recycling system and method |
| CN112897723A (en) * | 2021-01-25 | 2021-06-04 | 李进虎 | Mine water underground treatment process |
| CN113818824A (en) * | 2021-09-16 | 2021-12-21 | 中煤科工集团重庆研究院有限公司 | Pneumatic movable mining drilling flushing fluid recycling device |
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