CN111470665A - Mine hydroelectric thickening eddy current pretreatment system and use method - Google Patents
Mine hydroelectric thickening eddy current pretreatment system and use method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000008719 thickening Effects 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 318
- 239000010802 sludge Substances 0.000 claims abstract description 135
- 238000001914 filtration Methods 0.000 claims abstract description 48
- 239000002562 thickening agent Substances 0.000 claims abstract description 41
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 238000009826 distribution Methods 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims description 78
- 238000006243 chemical reaction Methods 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 14
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- 238000010992 reflux Methods 0.000 claims description 3
- 238000005189 flocculation Methods 0.000 abstract description 21
- 230000016615 flocculation Effects 0.000 abstract description 19
- 238000004062 sedimentation Methods 0.000 abstract description 13
- 238000005345 coagulation Methods 0.000 abstract description 9
- 230000015271 coagulation Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 15
- 239000000701 coagulant Substances 0.000 description 11
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- 238000001223 reverse osmosis Methods 0.000 description 2
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/006—Electrochemical treatment, e.g. electro-oxidation or electro-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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/15—Treatment of sludge; Devices therefor by de-watering, drying or thickening by treatment with electric, magnetic or electromagnetic fields; by treatment with ultrasonic waves
-
- 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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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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Abstract
The invention discloses a mine hydroelectric thickening eddy current pretreatment system and a use method, and is characterized by comprising an eddy current filtering separator, an electric thickener and a water inlet pipeline connected with the filtering separator, wherein the eddy current filtering separator comprises an outer surrounding barrel, an eddy current reactor is fixedly arranged in the middle of the outer surrounding barrel, the eddy current reactor divides the outer surrounding barrel into an upper part and a lower part, and a water distribution pipe and a filtering mechanism are fixedly arranged in the outer surrounding barrel above the eddy current reactor; the vortex reactor also comprises an outer barrel inserted into the vortex reactor, and a tangential water inlet communicated with the vortex reactor is arranged on the surface of one end, inserted into the vortex reactor, of the outer barrel. The invention leads the high-concentration and high-flocculation sludge into the water inlet pipeline, mixes the sludge with the mine water, can be used as a coagulation nucleus for the next step of vortex flocculation, and can improve the sedimentation speed of suspended matter flocs, thereby leading the treatment of the mine water to be more efficient.
Description
Technical Field
The invention relates to the technical field of mine water treatment, in particular to a mine hydroelectric thickening eddy current pretreatment system and a using method thereof.
Background
In the process of mining various mines, a large amount of mine water needs to be discharged, meanwhile, mine areas in China are seriously lack of water, and the mine waste water is discharged into the operating environment without being treated, so that the environment is polluted, and a large amount of waste of water resources is caused. In addition, the mine water is also influenced by domestic sewage of workers in a mining area, and the domestic sewage contains high emulsified oil and dissolved oil substances, so that the mine water not only has the characteristics of wastewater in the coal industry, but also has the characteristics of the domestic sewage; the method mainly has the following characteristics: the wastewater has high content of suspended matters, high turbidity, small granularity of suspended matters, small density and poor settling property; the coagulation effect is poor, alum floc is difficult to form in the coagulation process, and a coagulant aid are generally added to improve the settling property of the wastewater.
At present, a pre-sedimentation tank is arranged underground to precipitate large mineral particles, the mineral particles are conveyed to the ground through a lifting pump to be treated, the ground treatment generally adopts the technologies of advection sedimentation, coagulation sedimentation, filtration, disinfection and the like, and the treated mine water is recycled or directly discharged. The large-particle suspended solids contained in the mine water are precipitated quickly, most of the large-particle suspended solids are precipitated in an underground pre-precipitation tank, but suspended particles contained in the mine water subjected to ground treatment are small, the effect of sedimentation through simple gravity is poor, a large amount of coagulant is often required to be added, the small-particle suspended solids can be removed by the coagulant aid, the coagulant aid generally adopts polyaluminium chloride (PAC), the coagulant aid generally adopts Polyacrylamide (PAM), the whole treatment system is large in occupied area, small in operation elasticity, long in hydraulic retention time and high in operation cost, meanwhile, a large amount of chemical agents also enable the content of metal ions in the water to rise, and the salt content rises. If the advanced treatment process contains membrane treatment equipment such as ultrafiltration and reverse osmosis, the residual medicament can cause serious membrane blockage, greatly reduce the flux of a membrane system and seriously affect the operation effect and the treatment efficiency of the advanced treatment system.
CN102491564A discloses a comprehensive treatment technology for recycling mine water with high suspended matter and high mineralization, which comprises the step of adding a coagulant into the mine raw water to ensure that suspended colloidal particles in the water are destabilized by compression and double electric layers. The process adopts a coagulant adding method for pretreatment, the residue of the reagent is easy to cause subsequent ultrafiltration and the blockage of a reverse osmosis membrane, and the process cannot work stably and normally.
CN102557307B discloses a mine water deep treatment process and a system, and the process comprises the step of adding a coagulant into the mine water after primary precipitation for coagulation. The process adopts a coagulant adding method for pretreatment, the particle removal efficiency is low, the sludge production amount is large, and the subsequent electro-adsorption load pressure is large due to the introduction of new salt ions by adding the coagulant.
CN101544431A discloses a mine water high-efficiency treatment process, which comprises the steps of pre-precipitating and homogenizing mine water, then pre-treating (inclined plate precipitation or cyclone separation) to remove large-particle solids in the mine water, and then performing ceramic membrane ultrafiltration to obtain the treated mine water meeting the domestic water standard. In the process, a coagulant is not required to be added, but a large amount of small-particle suspended matters intercepted by the ultrafiltration of the ceramic membrane are remained in the system, so that the treatment load of the ceramic membrane system is increased along with the prolonging of the operation time, the ceramic membrane is seriously blocked, and the chemical cleaning is frequent.
Disclosure of Invention
The invention aims to provide a mine hydroelectric thickening eddy current pretreatment system and a using method thereof, which have the advantages of improving the sedimentation speed of suspended matter flocs and reducing the medicament consumption of flocculation reaction, and solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the mine hydroelectric thickening eddy pretreatment system is characterized by comprising an eddy filtering separator, an electric thickener and a water inlet pipeline connected with the eddy filtering separator, wherein the eddy filtering separator comprises an outer surrounding barrel, an eddy reactor is fixedly arranged in the middle of the inner part of the outer surrounding barrel, the eddy reactor divides the outer surrounding barrel into an upper part and a lower part, and a water distribution pipe and a filtering mechanism are fixedly arranged in the outer surrounding barrel above the eddy reactor; the device also comprises an outer barrel inserted into the vortex reactor, wherein a tangential water inlet communicated with the vortex reactor is arranged on the side surface of one end of the outer barrel inserted into the vortex reactor; the vortex reactor is characterized by also comprising a central riser pipe, wherein the central riser pipe penetrates through the vortex reactor, the upper end of the central riser pipe is communicated with the water distribution pipe, and the lower end of the central riser pipe extends into the lower part of the outer barrel;
the internal space of the vortex reactor is a vortex reaction zone, the annular space between the outer barrel and the central riser pipe is a vortex precipitation zone, the space between the inside of the outer surrounding barrel below the vortex reactor and the outside of the outer barrel is a sludge concentration zone, the space in the outer surrounding barrel above the vortex reactor is a filtering zone, and the middle part of the filtering zone is fixedly connected and communicated with a water collecting and draining pipe;
the lower part of the cyclone sedimentation zone is connected with the electric thickener through a pipeline; a pipeline for conveying sludge particles is connected between the middle part of the electric thickener and the water inlet pipeline, and a reflux pump for conveying the sludge particles in the electric thickener into the water inlet pipeline is arranged on the pipeline for conveying the sludge particles;
and the inner wall of the outer barrel is provided with a speed-increasing and pressure-increasing mechanism for increasing the flow velocity of water flow and keeping the pressure of the water flow, and the lower end of the central flow-rising pipe is lower than the lower surface of the speed-increasing and pressure-increasing mechanism.
Preferably, acceleration rate boost mechanism include spiral throttle seat, spiral throttle seat fix the inner wall at the urceolus, spiral throttle seat on set up the central water conservancy diversion passageway that the water supply flow got into, circular truncated cone shape recess has been seted up to the lower surface of spiral throttle seat, through spiral throttle cap is installed to the recess, spiral throttle cap surface seted up the spiral guiding gutter, spiral throttle cap middle part set up the logical groove that supplies central rising flow tube to stretch into, the lower extreme of central rising flow tube passes central water conservancy diversion passageway and logical groove and stretches out the lower surface of spiral throttle cap, and leaves the gap between central water conservancy diversion passageway and the central rising flow tube.
Preferably, a reflecting plate is further arranged in the sludge concentration area, the reflecting plate is umbrella-shaped, and the reflecting plate is positioned right below the central riser pipe.
Preferably, a porous hollow filler is arranged in the vortex reaction zone.
Preferably, the sludge treatment device further comprises a clear liquid return pipe, one end of the clear liquid return pipe is fixed and communicated with the upper part of the sludge concentration area, a through hole is formed in the middle of the reflecting plate, and the other end of the clear liquid return pipe is connected and communicated with the through hole in the middle of the reflecting plate.
Preferably, one or more layers of water distribution pipes are arranged in the filtering area.
Preferably, the speed-increasing and pressure-increasing mechanism further comprises a turbofan grid plate fixedly connected to the inner wall of the bottom end of the central riser pipe, and the rotation direction of the turbofan grid plate is opposite to the water flow rotation direction.
The invention also provides a using method: a method for using a mine hydroelectric thickening eddy current pretreatment system comprises the following steps:
firstly, leading mine water to be treated into a water inlet pipeline through a pressure pump, enabling the mine water to enter a vortex filtering separator through the water inlet pipeline, and adding sludge particles into the water inlet pipeline;
secondly, the mine water treated in the first step enters a vortex reaction zone, after the mine water reacts in the vortex reaction zone, the mine water enters an outer cylinder through a tangential water inlet to form a rotational flow, and the mine water enters a sludge concentration zone after being adjusted by a speed-increasing and pressure-increasing mechanism in the outer cylinder;
thirdly, the mine water and the particulate matters treated in the second step rotate along the inner wall of the outer barrel and descend to a sludge concentration area, the mine water and a reflecting plate arranged in the sludge concentration area are impacted in the sludge concentration area, and the mine water and the particulate matters are reflected to the periphery by the reflecting plate;
fourthly, after the mine water and the particulate matters are treated in the third step, the particulate matters are gathered and precipitated to the bottom of a sludge concentration area under the action of centrifugal force and gravity, clear water is arranged at the upper part of the sludge concentration area, the rotation speed and the downward speed of the mine water and the particulate matters are increased in the process that the mine water and the particulate matters pass through a speed-increasing and boosting mechanism in the third step, the particulate matters with the increased rotation speed are thrown to the periphery by larger centrifugal force, clear water is arranged in the middle of the sludge concentration area, the clear water in the middle of the sludge concentration area enters a filtering area through a central riser pipe under the action of the pressure of water flow introduced by a water inlet pipe, and the clear water is discharged;
in the fourth step, the sludge settled at the bottom of the concentration zone is conveyed into an electric thickener through a pipeline, high flocculation activated sludge particles are formed in the electric thickener through treatment, and the sludge particles at the bottom are discharged through an external sludge discharge pipeline;
when the first step is carried out, the sludge particles treated by the electric thickener are guided into the water inlet pipeline.
Preferably, the speed-increasing and pressure-increasing mechanism comprises a spiral throttling seat, the spiral throttling seat is fixed on the inner wall of the outer barrel, a central diversion channel for water flow to enter is formed in the spiral throttling seat, a circular truncated cone-shaped groove is formed in the lower surface of the spiral throttling seat, a spiral throttling cap is installed through the groove, a spiral diversion groove is formed in the surface of the spiral throttling cap, a through groove for the central flow-rising pipe to extend into is formed in the middle of the spiral throttling cap, the lower end of the central flow-rising pipe penetrates through the central diversion channel and the through groove and extends out of the lower surface of the spiral throttling cap, and a gap is reserved between the central diversion channel and the central flow-rising pipe;
in the second step, the mine water firstly enters the central flow guide channel, and then enters the spiral flow guide groove on the spiral flow guide cap by utilizing the gap between the spiral flow guide cap and the spiral flow guide seat, when the mine water passes through the spiral flow guide groove, the pressure at the water inlet is basically kept unchanged, and the cross-sectional area of the spiral flow guide groove is smaller, so that the flow velocity of the water flow is increased, the pressure of the water flow is increased, and under the spiral action of the spiral flow guide groove, the flow state of the water flow is changed into more ordered spiral fluid, after the adjustment, the mine water is in a more rapid flow velocity, higher pressure and more stable rotational flow state in the sludge concentration area, so that the particles are subjected to larger centrifugal force, most of the particles are thrown to the periphery, and the middle clear water almost does not contain the particles, thereby reducing the particles in the clear water which goes out from the central riser pipe.
The speed-increasing and pressure-boosting mechanism further comprises a turbofan grid plate fixedly connected to the inner wall of the bottom end of the central flow-rising pipe, the rotation direction of the turbofan grid plate is opposite to the rotation direction of water flow, and when clear water is guided out through the central flow-rising pipe, pressure maintaining is carried out on water flow in a sludge settling area through the turbofan grid plate.
Preferably, the clear water circulating device further comprises a clear water circulating pipe, one end of the clear water circulating pipe is fixed to and communicated with the upper portion of the sludge concentration area, a through hole is formed in the middle of the reflecting plate, the other end of the clear water circulating pipe is connected with and communicated with the through hole in the middle of the reflecting plate, when clear water in the third step is guided out through the central riser pipe, the clear water circulating pipe is attracted by the pressure at the lower end of the central riser pipe, can absorb clear water on the upper portion of the sludge concentration area to flush the reflecting plate, and is converged with the rotational flow in the center above the reflecting plate and discharged by the.
Compared with the prior art, the invention has the following beneficial effects:
the invention is communicated with a sludge concentration area through an electric thickener by a pipeline, sludge accumulated at the sludge concentration area can be transferred into the electric thickener through the pipeline, and the sludge is treated by the electric thickener to form sludge particles with high concentration and high flocculation property. Meanwhile, the sludge particles in the electric thickener can be conveyed into the water inlet pipe through the connecting pipeline between the electric thickener and the water inlet pipe, and the sludge particles have the characteristics of high concentration and high flocculation property, can be used as a coagulation nucleus for next vortex flocculation, can improve the sedimentation speed of suspended matter flocs, and reduce the medicament consumption of the vortex flocculation;
secondly, the invention adopts the speed-up boosting mechanism capable of adjusting the water flow pressure balance and the water flow state, when mine water with smaller pressure and slower flow speed enters the speed-up boosting mechanism, the mine water firstly enters the central diversion channel, then enters the spiral diversion groove on the spiral diversion cap by utilizing the gap between the spiral diversion cap and the spiral diversion seat, after the mine water passes through the spiral diversion groove, because the pressure at the water inlet is basically kept unchanged, and the cross section area of the spiral diversion groove is smaller, the water flow speed and the water flow pressure are increased, and under the spiral action of the spiral diversion groove, the water flow state is changed into more ordered spiral fluid, after the adjustment, the mine water is in a spiral flow state with faster flow speed, larger pressure and more stable in the sludge concentration area, so that the particulate matters are subjected to larger centrifugal force, and most of the particulate matters are thrown to the periphery, and the middle clear water almost does not contain particles, thereby reducing the particles in the clear water discharged from the central riser pipe, and improving the working efficiency and the mine water treatment effect.
In conclusion, the invention adopts the technology of coupling the electric thickening and the eddy current reaction to solve the problems of large medicament consumption and poor treatment effect in the mine water treatment, can be applied to the technical field of the purification for removing the suspended matters in the mine water and industrial wastewater, can make full use of advantages and avoid disadvantages, uses sludge particles with high flocculation activity generated in the electric thickening process as the coagulation nuclei of the eddy current flocculation in the next step, can improve the sedimentation speed of suspended matter flocs, reduces the medicament consumption of the flocculation reaction, and greatly improves the floor area, the energy consumption and the management level of the whole system compared with the prior art.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of the structure of the present invention at A in FIG. 1;
FIG. 3 is a perspective view of a front view of the speed-increasing and pressure-increasing mechanism of the present invention;
FIG. 4 is a top cross-sectional view of the speed increasing and pressure increasing mechanism of the present invention;
FIG. 5 is a cross-sectional view of the upper surface of the spiral deflector cap of the present invention;
FIG. 6 is a cross-sectional view of the lower surface of the spiral throttle cap of the present invention;
FIG. 7 is a schematic view of a section of a vortex filter separator according to the present invention;
FIG. 8 is a schematic view of the mounting of the turbofan grid at the central riser duct of the present invention;
FIG. 9 is a schematic view of the structure of the present invention.
In the figure: the device comprises a vortex filtering separator 1, an outer surrounding barrel 101, a vortex reactor 102, a water distribution pipe 103, an electric thickener 2, a water inlet pipeline 3, a vortex reaction zone 4, a vortex settling zone 5, an outer barrel 6, a tangential water inlet 7, a reflecting plate 8, a sludge concentration zone 9, an up-flow pipe 10, a filtering zone 11, a water collecting and discharging pipe 12, a clear liquid return pipe 13, a sludge return pump 14, a multilayer water distribution pipe 15, a sludge collecting hopper 16, a direct current power supply 17, an anode plate 18, a cathode plate 19, a spiral throttling seat 20, a central diversion channel 21, a spiral throttling cap 22, a through groove 23, a spiral diversion groove 24 and a turbofan grid plate 25.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 9, the present invention provides a technical solution: a mine hydroelectric thickening eddy pretreatment system comprises an eddy filtering separator 1, an electric thickener 2 and a water inlet pipeline 3 connected with the eddy filtering separator 1, wherein the eddy filtering separator 1 comprises an outer surrounding barrel 101, an eddy reactor 102 is fixedly installed in the middle of the inner part of the outer surrounding barrel 101, the eddy reactor 102 divides the outer surrounding barrel 101 into an upper part and a lower part, and a water distribution pipe 103 and a filtering mechanism are fixedly installed in the outer surrounding barrel 101 above the eddy reactor 102; the outer barrel 6 is inserted into the vortex reactor 102, and a tangential water inlet 7 communicated with the vortex reactor 102 is arranged on the surface of one end, inserted into the vortex reactor 102, of the outer barrel 6; the device also comprises a central riser pipe 10, wherein the central riser pipe 10 penetrates through the vortex reactor 102, the upper end of the central riser pipe 10 is communicated with the water distribution pipe 103, and the lower end of the central riser pipe 10 extends into the lower part of the outer barrel 6.
The internal space of the vortex reactor 102 is a vortex reaction zone 4, the annular space between the outer barrel 6 and the central riser pipe 10 is a vortex precipitation zone 5, the space between the inside of the outer surrounding barrel 101 below the vortex reactor 102 and the outside of the outer barrel 6 is a sludge concentration zone 9, the space in the outer surrounding barrel 101 above the vortex reactor 102 is a filtering zone 11, and the middle part of the filtering zone 11 is fixedly connected and communicated with a water collecting and draining pipe 12.
The vortex filter separator 1 comprises an outer enclosure cylinder 101, the outer enclosure cylinder 101 of the vortex filter separator 1 of the present invention is composed of a cylinder with a cylindrical upper part and a cylinder with an inverted circular truncated cone lower part, and the inner space is divided into the above-mentioned different functional areas by arranging other components. The inner wall of the vortex reactor 102 is conical, the area of the cone is gradually increased, the mine water flow is swirled upwards from the bottom of the vortex reactor 102, the ascending flow velocity is gradually reduced from large to small, and reaction products of coarse flocs are formed; the cyclone settling zone 5 is mainly defined by an outer cylinder 6 and a central riser pipe 10, mine water flow enters the outer cylinder 6 from a tangential water inlet 7 after reacting in a vortex reaction zone 4 in a vortex reactor 102, and reaction products form stable cyclone in the cyclone settling zone (5) to continue to gather; the sludge concentration zone 9 is composed of a space between the wall of an outer surrounding cylinder 101 and the outer cylinder 6 which are positioned below the eddy current reaction zone 4; the filtering area 11 is enclosed by the wall of an outer enclosing cylinder 101 positioned above the eddy current reaction area 4, and the lower end of the central riser pipe 10 extends into the sludge concentration area 9 and is used for leading out clean water in the sludge concentration area 9.
The bottom of the sludge concentration area 9 is connected with the electric thickener 2 through a pipeline; a pipeline for conveying sludge particles is connected between the middle part of the electric thickener 2 and the water inlet pipeline 3, and a reflux pump 14 for conveying the sludge particles in the electric thickener 2 into the water inlet pipeline 3 is installed on the pipeline for conveying the sludge particles.
When in treatment, the mine water to be treated is led into the water inlet pipeline 3 through a pressure pump or other driving devices, and then enters the vortex filtering separator 1 through the water inlet pipeline 3; in the vortex filtering separator 1, the mine water firstly enters a vortex reaction zone 4 of the vortex filtering separator 1; the mine water after the reaction of the vortex reactor 102 enters the outer cylinder 6 through the tangential water inlet 7 and falls down in the outer cylinder 6 in a vortex manner, and the particle aggregation in the mine water is accelerated by mainly utilizing the vortex flow to control the flow state and the flow speed of the water flow; finally, the mine water treated by the method falls into a sludge concentration area 9, and is accumulated and precipitated at the sludge concentration area, and the mine water is accumulated in a sludge collecting hopper 16 at the bottom of the sludge concentration area 9 after being precipitated. After the sedimentation, the clear water on the upper surface is pressed into the central riser pipe 10 along with the rise of the liquid level and the water pressure of the external inlet water, then passes through the filtering area 11, the filtered clear water is discharged out of the system from the water collecting and discharging pipe 12, the discharged water does not pollute the environment, and the clear water can be utilized in other modes again.
In the invention, the electric thickener 2 is communicated with the sludge concentration area 9 through a pipeline, sludge accumulated in the sludge concentration area 9 is transferred into the electric thickener 2 through the pipeline, and the sludge is treated by the electric thickener 2 to form sludge particles with high concentration and high flocculation property, and the sludge particles have the characteristic of high flocculation activity. Meanwhile, the pipeline is connected between the electric thickener 2 and the water inlet pipe 3, so that sludge particles in the electric thickener 2 can be sent into the water inlet pipe 3 and can be used as a coagulation nucleus for next vortex flocculation, the sedimentation speed of suspended matter floc can be increased, and the medicament consumption of the vortex flocculation is reduced;
in addition, compared with the sludge particles at the bottom of the electric thickener 2, the sludge particles at the middle part of the electric thickener 2 have the characteristic of small particle size and are more easily suspended in mine water, so that the sludge particles are more conveniently contacted with other particles in the mine water.
The lower part of the cyclone settling zone 5 is provided with a speed-increasing and pressure-increasing mechanism for increasing the flow velocity of water flow and maintaining the pressure of the water flow, and the lower end of the central riser pipe 10 is lower than the lower surface of the speed-increasing and pressure-increasing mechanism.
Because the mine water enters the sludge concentration zone 9 in the cyclone precipitation zone 5, sometimes the flow velocity of the water flow in the outer cylinder 6 is unstable, the flow velocity of the water flow is slow, the pressure is low, the cyclone state is unstable, after the water flow with low cyclone velocity enters the sludge concentration zone 9, the centrifugal force on the particulate matters is small, the separation between the particulate matters and the clean water is small, which can cause that the water led out from the central riser pipe 10 contains more particulate matters, and the working efficiency and the working effect are reduced, the invention adopts the speed-increasing pressure-increasing mechanism which can increase the flow velocity, pressure and flow state, so that the water flow has faster flow velocity, higher pressure and stable cyclone when leaving the speed-increasing pressure-increasing mechanism and entering the sludge concentration zone 9, thereby the particulate matters are subjected to higher centrifugal force, most of the particulate matters can be thrown to the periphery, and the middle clean water contains almost no particulate matters, thereby reducing the particles in the clear water discharged from the central riser pipe 10 and improving the working efficiency and the treatment effect of the mine water.
Further, acceleration rate boost mechanism include spiral throttle seat 20, spiral throttle seat 20 fix the inner wall at urceolus 6, spiral throttle seat 20 on set up the central water conservancy diversion passageway 21 that supplies rivers to get into, the round platform shape recess has been seted up to the lower surface of spiral throttle seat 20, through spiral throttle cap 22 is installed to the recess, spiral throttle cap 22 surface seted up spiral guiding gutter 24, spiral throttle cap 22 middle part set up the logical groove 23 that supplies central rising flow pipe 10 to stretch into, the lower extreme of central rising flow pipe 10 passes central water conservancy diversion passageway 21 and logical groove 23 and stretches out the lower surface of spiral throttle cap 22, and leaves the gap between central water conservancy diversion passageway 21 and the central rising flow pipe 10. When mine water with lower pressure and lower flow speed enters the speed-increasing and pressure-increasing mechanism, the mine water firstly enters the central flow guide channel 21, then enters the spiral flow guide groove 24 on the spiral flow guide cap 22 by utilizing the gap between the spiral flow guide cap 22 and the spiral flow guide seat 20, after the mine water passes through the spiral flow guide groove 24, because the pressure at the water inlet pipeline 3 is basically kept unchanged, and the cross-sectional area of the spiral flow guide groove 24 is smaller, the flow speed and the pressure of the water flow are increased, and under the spiral action of the spiral flow guide groove 24, the flow state of the water flow is changed into more ordered spiral fluid, after the adjustment, the mine water is in a more rapid, more pressure and more stable spiral flow state in the sludge concentration area 9, so that the particles are subjected to higher centrifugal force, most of the particles are thrown to the periphery, and the middle clear water hardly contains particles, thereby reducing the particles in the clear water discharged from the central riser pipe 10 and improving the working efficiency and the treatment effect of the mine water. Clear water in the middle of the sludge concentration zone 9 enters the filtering zone 11 through the central riser pipe 10.
Furthermore, a reflecting plate 8 is arranged in the sludge concentration area 9, the reflecting plate 8 is umbrella-shaped, and the reflecting plate 8 is positioned right below the central riser pipe 10. The mine water flow impacts the reflecting plate 8, the reflecting plate 8 is umbrella-shaped, the inclined surface of the reflecting plate rebounds the mine water to the inner wall of the outer surrounding cylinder 101 of the sludge concentration area 9, the sludge accumulated at the bottom of the sludge concentration area 9 is prevented from being disturbed and suspended again due to the fact that the water flow directly impacts the sludge, and therefore the sludge which is already deposited before is prevented from being damaged. Meanwhile, the reflecting plate 8 is arranged right below the central riser pipe 10, so that water flow of the central riser pipe 10 cannot attract sludge at the bottom of the sludge concentration area 9, and disturbance of sludge precipitation at the bottom of the sludge concentration area 9 is avoided.
Furthermore, a porous hollow filler is arranged in the vortex reaction zone 4.
Further, the device also comprises a clear liquid return pipe 13, one end of the clear liquid return pipe 13 is fixed and communicated with the upper part of the sludge concentration area 9, a through hole is formed in the middle of the reflecting plate 8, and the other end of the clear liquid return pipe is connected and communicated with the through hole in the middle of the reflecting plate 8; when clear water is led out from the central riser pipe 10, the pressure of the pipe orifice of the central riser pipe 10 acts on the clear water return pipe 13 to suck the liquid in the clear water return pipe 13, so that a part of clear water at the upper part of the sludge concentration area 9 can be backflushed to the reflecting plate 8, the clear water does not have the characteristic of rotational flow, the mine water falling onto the reflecting plate 8 from the outer barrel 6 is rotational flow, the water in the center above the reflecting plate 8 is spiral, and when the clear water in the clear water return pipe 13 and the mine water rotational flow on the reflecting plate 8 are converged together, the clear water is discharged from the central riser pipe 10.
Furthermore, two layers of water distribution pipes 15 are arranged in the filtering area 11, the filtering area 11 is divided into two sub-filtering areas, and each sub-filtering area is provided with a water distribution pipe 15.
Further, acceleration rate boost mechanism still include the turbofan grid plate 25 of fixed connection at central riser 10 bottom inner wall, and this turbofan grid plate 25 revolve to opposite with rivers whirl direction, because the water that gets into in the central riser 10 is the water directly over the reflecting plate 8, this part of water itself is spiral whirl state, and revolve to opposite turbofan grid plate 25 that sets up with this whirl and can produce the reaction force to this rivers, thereby make rivers when exporting through central riser 10, the maintenance that rivers pressure can try hard to, thereby avoid causing great influence to the rivers whirl speed in the sludge concentration district 9, make the inner wall sediment along sludge concentration district 9 that the granule can be better.
The invention also provides a using method of the mine hydroelectric thickening eddy current pretreatment system, which comprises the following steps:
firstly, leading mine water to be treated into a water inlet pipeline 3 through a pressure pump, leading the mine water into a vortex filtering separator 1 through the water inlet pipeline 3, and simultaneously adding sludge particles with high flocculation activity into the water inlet pipeline 3;
secondly, the mine water treated in the first step enters a vortex reaction zone 4, after the mine water reacts in the vortex reaction zone 4, the mine water enters an outer cylinder 6 through a tangential water inlet 7 to form a rotational flow, and the mine water enters a sludge concentration zone 9 after being adjusted by a speed-increasing and pressure-increasing mechanism in the outer cylinder 6;
thirdly, the mine water and the particles processed in the second step rotate along the inner wall of the outer barrel 6 and descend to a sludge concentration area 9, the mine water and the particles impact a reflecting plate 8 in the sludge concentration area 9, and the reflecting plate 8 reflects the mine water and the particles to the periphery;
fourthly, after the mine water and the particulate matters are treated in the third step, the particulate matters are gathered and precipitated to the bottom of the sludge concentration area 9 under the action of centrifugal force and gravity, clear water is arranged at the upper part of the sludge concentration area 9, the rotation speed and the downward speed of the mine water and the particulate matters are increased in the process that the mine water and the particulate matters pass through the speed-increasing and boosting mechanism in the third step, the particulate matters with the increased rotation speed are thrown to the periphery by larger centrifugal force, clear water is arranged in the middle, the clear water in the middle enters the filtering area 11 through the central riser pipe 10 under the action of the pressure of the water flow led in by the water inlet pipe 3, and the clear water is discharged out of the system from the central water collecting;
in the fourth step, the sludge settled at the bottom of the concentration zone 9 is conveyed into the electric thickener 2 through a pipeline, high-concentration and high-flocculation sludge particles are formed in the electric thickener 2, and the sludge particles at the bottom are discharged through an external sludge discharge pipeline;
when the first step is carried out, the sludge particles treated by the electric thickener 2 are guided into the water inlet pipeline 3;
further, the speed-increasing and pressure-increasing mechanism comprises a spiral throttling seat 20, the spiral throttling seat 20 is fixed on the inner wall of the outer cylinder 6, a central diversion channel 21 for water flow to enter is formed in the spiral throttling seat 20, a circular truncated cone-shaped groove is formed in the lower surface of the spiral throttling seat 20, a spiral throttling cap 22 is installed through the groove, a spiral diversion groove 24 is formed in the surface of the spiral throttling cap 22, a through groove 23 for the central flow-increasing pipe 10 to extend into is formed in the middle of the spiral throttling cap 22, the lower end of the central flow-increasing pipe 10 penetrates through the central diversion channel 21 and the through groove 23 and extends out of the lower surface of the spiral throttling cap 22, and a gap is reserved between the central diversion channel 21 and the central flow-increasing pipe 10;
in the second step, the mine water firstly enters the central diversion channel 21, then enters the spiral diversion groove 24 on the spiral diversion cap 22 by utilizing the clearance between the spiral diversion cap 22 and the spiral diversion seat 20, when the mine water passes through the spiral diversion groove 24, since the pressure at the inlet 3 remains substantially constant, and the cross-sectional area of the spiral guide groove 24 is smaller, this will result in an increase in the flow velocity and pressure of the water, and under the spiral action of the spiral diversion trench 24, the flow state of the water flow is changed into more orderly spiral fluid, and after the adjustment, the mine water is in a more stable rotational flow state with faster flow speed and higher pressure in the sludge concentration area 9, thereby subjecting the particles to a greater centrifugal force, which will throw the vast majority of the particles to the periphery, the intermediate clean water contains almost no particles, thereby reducing the particles in the clean water exiting the central riser pipe 10.
The speed-increasing and pressure-boosting mechanism further comprises a turbofan grid plate 25 fixedly connected to the inner wall of the bottom end of the central flow-rising pipe 10, the rotation direction of the turbofan grid plate 25 is opposite to the rotational flow direction of water flow, and when clear water is guided out through the central flow-rising pipe 10, the pressure of the water flow in the sludge settling zone 9 is maintained by the turbofan grid plate 25.
Further, still include clear liquid back flow pipe 13, clear liquid back flow pipe 13 one end and the fixed and intercommunication in upper portion of sludge concentration district 9, reflecting plate 8 middle part seted up the through-hole, clear liquid back flow pipe 13 other end and the through-hole at reflecting plate 8 middle part be connected and the intercommunication, when the clear water in the third step was derived through central riser 10, clear liquid back flow pipe 13 received the attraction of central riser 10 lower extreme pressure can absorb the clear water on sludge concentration district 9 upper portion and wash on reflecting plate 8, assembles with the whirl of reflecting plate 8 top central authorities, is discharged by central riser 10
Further, the sludge particles introduced into the water inlet pipe 3 are sludge particles in the middle of the electric thickener 2.
The working principle is as follows: in the invention, when in treatment, the mine water to be treated is led into the water inlet pipeline 3 through the pressure pump or other driving devices, and then the mine water enters the vortex filtering separator 1 through the water inlet pipeline 3; in the vortex filtering separator 1, the mine water firstly enters a vortex reaction zone 4 of the vortex filtering separator 1, the vortex reaction zone 4 is mainly in a vortex reactor 102, the vortex reactor 102 is conical, the area of the cone is gradually increased, the mine water flow is swirled upwards from the bottom of the vortex reactor 102, the ascending flow velocity is gradually reduced from large to small, and a reaction product of coarse flocs is formed; the mine water after the reaction of the vortex reactor enters a cyclone settling zone 5, and the cyclone settling zone is mainly used for controlling the flow state and the flow speed of water flow to improve the concentration degree and the concentration speed of particles in the mine water; finally, the mine water treated by the method falls into a sludge concentration area 9, and is accumulated and precipitated at the sludge concentration area, and the sludge is accumulated in a sludge collecting hopper 16 after being precipitated. After the sedimentation, the clear water on the upper surface is pressed into the central riser pipe 10 along with the rise of the liquid level and the water pressure of the external inlet water, then passes through the filtering area 11 gradually, the filtered clear water is discharged out of the system from the water collecting and discharging pipe 12, the discharged water does not pollute the environment, and the clear water can be utilized in other modes again. In the invention, the electric thickener 2 is communicated with the sludge concentration area 9 through a pipeline, sludge accumulated at the sludge concentration area 9 is transferred into the electric thickener 2 through the pipeline, and the sludge is treated by the electric thickener 2 to form sludge particles with high concentration and high flocculation property. Meanwhile, the pipeline is connected between the electric thickener 2 and the water inlet pipeline 3, so that sludge particles in the electric thickener 2 can be sent into the water inlet pipeline 3, the sludge particles have the characteristic of high concentration and high flocculation property, can be used as a coagulation nucleus for next vortex flocculation, can improve the sedimentation speed of suspended matter flocs, and reduce the medicament consumption of the vortex flocculation;
when mine water with lower pressure and lower flow speed enters the speed-increasing and pressure-increasing mechanism, the mine water firstly enters the central flow guide channel 21, then enters the spiral flow guide groove 24 on the spiral flow guide cap 22 by utilizing the gap between the spiral flow guide cap 22 and the spiral flow guide seat 20, after the mine water passes through the spiral flow guide groove 24, because the pressure at the water inlet 3 is basically kept unchanged, and the cross-sectional area of the spiral flow guide groove 24 is smaller, the flow speed and the pressure of the water flow are increased, and under the spiral action of the spiral flow guide groove 24, the flow state of the water flow is changed into more ordered spiral fluid, after the adjustment, the mine water is in a more rapid, more pressure and more stable spiral flow state in the sludge concentration area 9, so that the particles are subjected to higher centrifugal force, most of the particles are thrown to the periphery, and the middle clear water hardly contains particles, thereby reducing the particles in the clear water discharged from the central riser pipe 10 and improving the working efficiency and the treatment effect of the mine water. Clear water in the middle of the sludge concentration zone 9 enters the filtering zone 11 through the central riser pipe 10.
In order to verify the technical effects of the present invention, the present inventors conducted experiments.
The water quality before the mine water treatment is suspended matter inlet water concentration of 306.6 mg/L, the water quality after the mine water treatment is suspended matter outlet water concentration of 5.8 mg/L, the removal rate of suspended matter SS reaches 98.11%, and the water treatment speed of the invention reaches 22.5m3/m2·h。
The inventor also adjusts the pretreatment system of the invention, and verifies the technical effect after the speed-increasing and pressure-increasing mechanism is adopted. The inventor adjusts the water inflow under the condition of ensuring the water quality of the discharged water.
The comparison scheme 1 is a pretreatment system after the speed-increasing and pressure-boosting device is completely removed.
The comparison scheme 3 is a pretreatment system only adding a turbofan grid plate to remove other speed-increasing and pressure-increasing devices.
According to the experiment, the technology of coupling the electric thickening and the eddy reaction has a good technical effect on mine water treatment, and the mine water suspended matter removing effect is obvious.
In addition, the invention can obviously improve the water treatment speed and reduce the concentration of suspended matters in the effluent through the arrangement of the speed-increasing and pressure-increasing device.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (11)
1. The mine hydroelectric thickening eddy current pretreatment system is characterized by comprising an eddy current filtering separator (1), an electric thickener (2) and a water inlet pipeline (3) connected with the eddy current filtering separator (1), wherein the eddy current filtering separator (1) comprises an outer surrounding barrel (101), an eddy current reactor (102) is fixedly installed in the middle of the inner part of the outer surrounding barrel (101), the outer surrounding barrel (101) is divided into an upper part and a lower part by the eddy current reactor (102), and a water distribution pipe (103) and a filtering mechanism are fixedly installed in the outer surrounding barrel (101) above the eddy current reactor (102); the device also comprises an outer barrel (6) inserted into the vortex reactor (102), wherein a tangential water inlet (7) communicated with the vortex reactor (102) is formed in the side surface of one end, inserted into the vortex reactor (102), of the outer barrel (6); the device also comprises a central riser pipe (10), wherein the central riser pipe (10) penetrates through the vortex reactor (102), the upper end of the central riser pipe (10) is communicated with the water distribution pipe (103), and the lower end of the central riser pipe (10) extends into the lower part of the outer barrel (6);
the internal space of the vortex reactor (102) is a vortex reaction zone (4), the annular space between the outer barrel (6) and the central riser pipe (10) is a vortex precipitation zone (5), the space between the inner part of the outer surrounding barrel (101) below the vortex reactor (102) and the outer part of the outer barrel (6) is a sludge concentration zone (9), the space in the outer surrounding barrel (101) above the vortex reactor (102) is a filtering zone (11), and the middle part of the filtering zone (11) is fixedly connected and communicated with a water collecting and draining pipe (12);
the bottom of the sludge concentration area (9) is connected with the electric thickener (2) through a pipeline; a pipeline for conveying sludge particles is connected between the middle part of the electric thickener (2) and the water inlet pipeline (3), and a reflux pump (14) for conveying the sludge particles in the electric thickener (2) into the water inlet pipeline (3) is arranged on the pipeline for conveying the sludge particles.
2. The mine hydroelectric thickening vortex pretreatment system of claim 1, wherein: the lower part of the cyclone settling zone (5) is provided with a speed-increasing and pressure-increasing mechanism for increasing the flow velocity of water flow and maintaining the pressure of the water flow, and the lower end of the central riser pipe (10) is lower than the lower surface of the speed-increasing and pressure-increasing mechanism; acceleration rate boost mechanism include spiral throttle seat (20), spiral throttle seat (20) fix the inner wall at urceolus (6), spiral throttle seat (20) on set up central water conservancy diversion passageway (21) that the water supply flow got into, the lower surface of spiral throttle seat (20) has seted up round platform shape recess, through spiral throttle cap (22) is installed to the recess, spiral throttle cap (22) surface seted up spiral guiding gutter (24), spiral throttle cap (22) middle part set up logical groove (23) that supply central rising flow pipe (10) to stretch into, the lower extreme of central rising flow pipe (10) passes central water conservancy diversion passageway (21) and leads to groove (23) and stretches out the lower surface of spiral throttle cap (22), and leaves the gap between central water conservancy diversion passageway (21) and central rising flow pipe (10).
3. The mine hydroelectric thickening vortex pretreatment system of claim 2, wherein: the sludge concentration area (9) is also internally provided with a reflecting plate (8), the reflecting plate (8) is umbrella-shaped, and the reflecting plate (8) is positioned right below the central riser pipe (10).
4. The mine hydroelectric thickening vortex pretreatment system of claim 1, wherein: and a porous hollow filler is arranged in the vortex reaction zone (4).
5. The mine hydroelectric thickening vortex pretreatment system of claim 3, wherein: still include clear liquid back flow pipe (13), the one end of clear liquid back flow pipe (13) fixed and the intercommunication with the upper portion of sludge thickening district (9), reflecting plate (8) middle part seted up the through-hole, clear liquid back flow pipe (13) other end and the through-hole in reflecting plate (8) middle part be connected and the intercommunication.
6. The mine hydroelectric thickening vortex pretreatment system of claim 3, wherein: one or more layers of water distribution pipes (15) are arranged in the filtering area (11).
7. The mine hydroelectric thickening eddy current pretreatment system as claimed in claim 2, wherein the speed-increasing and boosting mechanism further comprises a turbofan grid (25) fixedly connected to the inner wall of the bottom end of the central riser pipe (10), and the direction of rotation of the turbofan grid (25) is opposite to the direction of water flow rotation.
8. A method of using the mine hydroelectric thickening vortex pretreatment system of claim 3, comprising the steps of:
firstly, leading mine water to be treated into a water inlet pipeline (3) through a pressure pump, leading the mine water into a vortex filtering separator (1) through the water inlet pipeline (3), and simultaneously adding sludge particles into the water inlet pipeline (3);
secondly, the mine water treated in the first step enters a vortex reaction zone (4), after the mine water reacts in the vortex reaction zone (4), the mine water enters an outer cylinder (6) through a tangential water inlet (7) to form a rotational flow, and enters a sludge concentration zone (9) after being adjusted by a speed-increasing and pressure-increasing mechanism in the outer cylinder (6);
thirdly, the mine water and the particles processed in the second step rotationally descend to a sludge concentration area (9) along the inner wall of the outer barrel (6), the mine water and a reflecting plate (8) arranged in the sludge concentration area (9) are impacted in the sludge concentration area (9), and the mine water and the particles are reflected to the periphery by the reflecting plate (8);
fourthly, after the mine water and the particulate matters are treated in the third step, the particulate matters are gathered and precipitated to the bottom of a sludge concentration area (9) under the action of centrifugal force and gravity, clear water is arranged at the upper part of the sludge concentration area (9), the rotating speed and the downward speed of the mine water and the particulate matters are increased in the process that the mine water and the particulate matters pass through a speed-increasing and boosting mechanism in the third step, the particulate matters with the increased rotating speed are thrown to the periphery by larger centrifugal force, clear water is arranged in the middle, the clear water in the middle enters a filtering area (11) through a central riser pipe (10) under the action of the pressure of water flow led in by a water inlet pipe (3), and the clear water is discharged out of the system from a central water collecting and draining pipe (;
in the fourth step, the sludge settled at the bottom of the sludge concentration zone (9) is conveyed into the electric thickener (2) through a pipeline, sludge particles are formed in the electric thickener (2) in a treatment way, and the sludge particles at the bottom are discharged through an external sludge discharge pipeline;
when the first step is carried out, the sludge particles treated by the electric thickener (2) are guided into the water inlet pipeline (3).
9. The method of using the mine hydroelectric thickening vortex pretreatment system of claim 8, it is characterized in that the speed-increasing and pressure-increasing mechanism comprises a spiral throttling seat (20), the spiral throttling seat (20) is fixed on the inner wall of the outer cylinder (6), the spiral throttling seat (20) is provided with a central flow guide channel (21) for water flow to enter, the lower surface of the spiral throttling seat (20) is provided with a circular truncated cone-shaped groove, a spiral throttling cap (22) is arranged through the groove, a spiral diversion trench (24) is arranged on the surface of the spiral throttling cap (22), the middle part of the spiral throttling cap (22) is provided with a through groove (23) for the central riser pipe (10) to extend into, the lower end of the central riser pipe (10) passes through the central diversion channel (21) and the through groove (23) and extends out of the lower surface of the spiral throttling cap (22), and a gap is reserved between the central flow guide channel (21) and the central riser pipe (10);
in the second step, the mine water firstly enters the central diversion channel (21), then enters the spiral diversion groove (24) on the spiral diversion cap (22) by utilizing the gap between the spiral diversion cap (22) and the spiral diversion seat (20), when the mine water passes through the spiral diversion groove (24), because the pressure at the water inlet pipeline (3) is basically kept unchanged, and the cross section area of the spiral diversion groove (24) is smaller, the flow velocity of the water flow is increased, the pressure of the water flow is increased, and under the spiral action of the spiral diversion groove (24), the flow state of the water flow is changed into more ordered spiral fluid, after the adjustment, the mine water is in a more rapid, more pressure and more stable spiral flow state in the sludge concentration area (9), so that the particles are subjected to larger centrifugal force, most of the particles are thrown to the periphery, and the middle clear water almost does not contain the particles, thereby reducing the particles in the clear water exiting the central riser pipe (10).
10. The method of using the mine hydroelectric thickening vortex pretreatment system of claim 9,
the speed-increasing and pressure-boosting mechanism further comprises a turbofan grid plate (25) fixedly connected to the inner wall of the bottom end of the central flow-rising pipe (10), the rotation direction of the turbofan grid plate (25) is opposite to the rotation direction of water flow, and when clear water is led out through the central flow-rising pipe (10), pressure maintaining is carried out on the water flow in the sludge settling area (9) through the turbofan grid plate (25).
11. The method of using the mine hydroelectric thickening vortex pretreatment system of claim 9,
still include clear liquid back flow pipe (13), the one end of clear liquid back flow pipe (13) fixed and the intercommunication with the upper portion of sludge concentration district (9), reflecting plate (8) middle part seted up the through-hole, the clear liquid back flow pipe (13) other end be connected and the intercommunication with the through-hole at reflecting plate (8) middle part, when the clear water in the third step was derived through central rising flow pipe (10), clear liquid back flow pipe (13) received the attraction of central rising flow pipe (10) lower extreme pressure can absorb the clear water on sludge concentration district (9) upper portion and wash reflecting plate (8) on, assemble with the whirl of reflecting plate (8) top central authorities, discharge by central rising flow pipe (10).
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