CN112939169A - System and method for treating high-suspended matter mine water by coal gangue sand medium - Google Patents
System and method for treating high-suspended matter mine water by coal gangue sand medium Download PDFInfo
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- CN112939169A CN112939169A CN202110140795.6A CN202110140795A CN112939169A CN 112939169 A CN112939169 A CN 112939169A CN 202110140795 A CN202110140795 A CN 202110140795A CN 112939169 A CN112939169 A CN 112939169A
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5263—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical compounds
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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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
Abstract
The invention provides a system and a method for treating high-suspended substance mine water by coal gangue sand medium, which comprises a water inlet unit and a treatment unit, wherein the treatment unit comprises a mixing tank, an adding tank, a growing tank and a sedimentation tank which are connected in sequence, the water outlet of the water inlet unit is connected with the water inlet of the mixing tank, a coagulant adding subsystem is arranged above the mixing tank, a flocculant adding subsystem, a coal gangue sand reusing subsystem and a coal gangue sand replenishing subsystem are arranged above the adding tank, a sludge discharge hopper is arranged at the bottom of the sedimentation tank, the coal gangue sand reusing subsystem is connected with the sludge discharge hopper, and a water outlet is arranged at the upper part of the side wall of the sedimentation tank. By adopting the technical scheme of the invention, the sedimentation speed of flocs can be greatly accelerated, the removal effect of suspended particles and colloids in mine water is improved, and the method has the advantages of low investment cost, small operation pressure, high system load, small occupied area, high coal gangue utilization rate and the like.
Description
Technical Field
The invention relates to the technical field of mine water treatment, in particular to a system and a method for treating high-suspended matter mine water by using a coal gangue sand medium.
Background
The reserve of coal resources in China is located in the third world, the energy demand is continuously increased along with the continuous vigorous development of Chinese economy, coal occupies an important position in the energy structure in China as a country with large energy consumption, and accounts for about 75% of the national disposable energy consumption, but most of coal mining in China adopts an underground mining mode, and coal gangue and mine water are discharged as accompanying matters in large quantities in the coal mining process.
Compared with coal, the coal gangue has lower heat value and contains Al2O3、SiO2And Fe2O3Inorganic components are difficult to recycle, so that the industrial solid waste is generated, according to statistics, 0.15-0.2 ton of coal gangue is generated per 1 ton of raw coal produced, a large amount of coal gangue is stacked to bring serious social, environmental and economic problems, the stacking of the coal gangue not only occupies a large amount of land to reduce the area of cultivated land, forest land and the like, but also causes hidden dangers such as landslide, debris flow and the like, sulfur dioxide, nitrogen oxide and other substances generated by spontaneous combustion of the coal gangue not only pollute the atmosphere, but also pollute surface water, underground water and soil along with rainwater to cause serious damage to the ecological environment.
The mine water is underground water which is used for mining coal seams and nearby roadways underground, sometimes part of surface water can permeate into the underground along with surface cracks to become mine water, the direct discharge of the mine water not only can cause huge waste of water resources, and the mine water containing coal dust, rock dust and other pollutants is discharged in large quantity, which causes serious environmental pollution to mining areas and surrounding environment and damages environmental benefits, meanwhile, the water resource in China has the characteristic of uneven space-time distribution, coal-rich areas are often lack of water, along with the increase of coal mining intensity and the extension of space, the underground water level of a mining area is greatly reduced, so that the local water shortage form is more severe, according to the establishment of the discharge standard of pollutants in the coal industry, 71 percent of 86 large key coal enterprises in China have water shortage, wherein, the water shortage is about 40 percent seriously and becomes an important factor for restricting the healthy development of the coal industry in China. Therefore, reasonable development and utilization of coal gangue and mine water resources have important significance on sustainable development of coal mines.
The water quality survey data of coal mine water in China shows that mine water in China generally contains a large amount of suspended matters formed by coal dust and rock powder, the proportion of the mine water in the north is larger, the discharge amount accounts for about 60% of the water inflow rate of important coal mines in the north, the mine water contains partial ions, a small amount of organic matters and a large amount of bacteria brought in by underground personnel activities and a mine water conveying process besides the coal dust, the rock powder and other substances brought in the north, if the mine water is directly discharged, the problems of landscape damage, river channel blockage, influence on animal and plant growth and the like can be caused, if the suspended matters in the water directly enter a subsequent treatment process without being removed, the problems of subsequent process equipment damage, treatment system stability reduction, pipeline blockage and the like can be caused, and in view of the above, various mine water suspended matter treatment technologies are developed.
The mine water in China has been developed and utilized as a water resource for more than 40 years, and the process flow of the mine water containing suspended matters is generally as follows: the mine water treatment process includes raising mine water from underground water bin to ground, building various treating structures on the ground to reach the water quality requirement of reused water, utilizing the water partially in the ground and returning the water partially to the underground, and has the problems of high mine water raising cost, large floor area, high investment, great difficulty in water supply and decompression, etc. compared with ground treating process, the mine water treatment process has the advantages of saving in land, saving in investment, low operation cost, etc. owing to the special underground space environment, the width of the underground tunnel is about 5m, height of about 4m, etc., the underground mine water treatment process has great load, high water quality, low cost and other advantages The high suspended matter mine water treatment equipment which has the advantages of small occupied area and the like and can reasonably utilize coal gangue resources has good practicability and practical significance.
Disclosure of Invention
The invention aims to provide a system for treating high-suspended matter mine water by using a coal gangue sand medium, which has the advantages of low investment cost, small operation pressure, high system load, small occupied area, high coal gangue utilization rate and the like; the invention also provides a method for treating the high-suspended matter mine water by the coal gangue sand medium, which treats waste by waste, can greatly accelerate the sedimentation speed of floc, improve the removal effect of suspended particles and colloid in the mine water, simultaneously realize the recycling of coal gangue and reduce the treatment cost.
The invention provides a system for treating high-suspended substance mine water by a coal gangue sand medium, which comprises a water inlet unit and a treatment unit, wherein the treatment unit comprises a mixing tank, an adding tank, a growing tank and a sedimentation tank which are sequentially connected, a water outlet of the water inlet unit is connected with a water inlet of the mixing tank, a coagulant adding subsystem is arranged above the mixing tank, a flocculant adding subsystem, a coal gangue sand reusing subsystem and a coal gangue sand supplementing subsystem are arranged above the adding tank, a sludge discharge hopper is arranged at the bottom of the sedimentation tank and connected with the coal gangue sand reusing subsystem, and a water outlet is arranged at the upper part of the side wall of the sedimentation tank.
Further, the gangue sand multiplexing subsystem comprises an electromagnetic valve, a ball valve, a pneumatic diaphragm pump, an oil-free mute air pump, a pressure sensor and a hydrocyclone;
the oil-free mute air pump is respectively connected with the electromagnetic valve and the pneumatic diaphragm pump, the pneumatic diaphragm pump is respectively connected with the sludge discharge hopper and the hydrocyclone through pipelines, the pressure sensor is positioned at the inlet of the hydrocyclone, the ball valve is positioned on the pipeline between the pneumatic diaphragm pump and the hydrocyclone, and the ball valve and the pressure sensor are both connected with the controller;
the top of the hydrocyclone is provided with an overflow pipe, the bottom of the hydrocyclone is provided with a underflow port, and the underflow port is connected with the top of the adding pool through an adding pipe.
The sediment in the sedimentation tank is pressurized by a pneumatic diaphragm pump and then enters a hydraulic cyclone, the friction between the sediment and between the sediment and the inner wall of the hydraulic cyclone is generated under the hydraulic action, so that the coal gangue sand is separated from flocs adhered on the coal gangue sand, the coarse coal gangue sand is discharged from a bottom flow port at the bottom of the hydraulic cyclone and is put into an adding tank, the recycling of the coal gangue sand is realized, polyurethane materials are adopted for the inner walls of an adding pipe, a pipeline, the pneumatic diaphragm pump and the hydraulic cyclone, the wear resistance can be improved, the durability is increased, the wear caused by the friction of the coal gangue sand is reduced, the controller is a programmable logic controller S7-1200, and the automatic control of a coal gangue sand multiplexing subsystem is realized through the programmable logic controller S7-1200.
Further, the processing unit also comprises a sludge processing subsystem, and the sludge processing subsystem is connected with the overflow pipe. After the sediment in the sedimentation tank is treated by the hydrocyclone, sludge water containing flocs is discharged from an overflow pipe at the top of the hydrocyclone and enters a sludge treatment subsystem, and the sludge treatment subsystem is a conventional sludge treatment device.
Further, the gangue sand supplementing subsystem comprises a powder feeder, the powder feeder is connected with the top of the feeding pool through a feeding pipe, and the powder feeder is connected with the controller. The coal gangue sand has partial loss in the using process, and the loss amount of the coal gangue sand is supplemented through the coal gangue sand supplementing subsystem.
Further, gangue sand supplyes the subsystem and is connected with gangue sand preparation subsystem, gangue sand preparation subsystem is including jaw breaker, counterattack formula breaker, system sand machine and the milling machine that connects gradually, the discharge gate of milling machine through defeated material machine with the powder feeder is connected. The coal gangue is crushed into 180-mesh coal gangue sand with the grain size of 100-.
Further, the coagulant adding subsystem comprises a coagulant tank, a coagulant metering pump and a first frequency converter, the coagulant tank is connected with an inlet of the coagulant metering pump through an adding pipe, an outlet of the coagulant metering pump is connected with the top of the adding pool through an adding pipe, and the first frequency converter is respectively connected with the coagulant metering pump and the controller;
the flocculant comprises a flocculant medicine tank, a flocculant metering pump and a second frequency converter, wherein the flocculant medicine tank is connected with an inlet of the flocculant metering pump through an adding pipe, an outlet of the flocculant metering pump is connected with the top of an adding pool through an adding pipe, and the second frequency converter is respectively connected with the flocculant metering pump and the controller.
The coagulant is automatically and quantitatively put into the mixing tank through a coagulant adding subsystem, the electric potential of a zeta potential of particulate matters contained in the high-suspended matter mine water is reduced through the putting of the coagulant, and colloidal particles collide with each other and grow continuously under the action of homodromous and heterodromous flocculation; the flocculating agent is automatically and quantitatively added by the flocculating agent adding subsystem, so that the combination speed of the flocs in the water and the coal gangue sand is accelerated.
Further, the water inlet unit comprises an adjusting tank, a stirrer is arranged inside the adjusting tank, a water outlet of the adjusting tank is connected with a water inlet of the mixing tank through a water conveying pipe, and a pressure pump is arranged on the water conveying pipe;
a mixing tank stirring paddle is arranged in the mixing tank, the top end of the mixing tank stirring paddle is connected with a mixing tank stirring motor, the mixing tank stirring motor is positioned at the top of the mixing tank, and a water outlet of the mixing tank is communicated with the side wall of the adding tank;
a stirring paddle of the feeding tank is arranged in the feeding tank, the top end of the stirring paddle of the feeding tank is connected with a stirring motor of the feeding tank, the stirring motor of the feeding tank is positioned at the top of the feeding tank, and a water outlet of the feeding tank is communicated with the side wall of the growth tank;
the inside in growth pond is equipped with growth pond agitator paddle, the top and the growth pond agitator motor of growth pond agitator paddle are connected, growth pond agitator motor is located the top in growth pond, the delivery port in growth pond with the lateral wall intercommunication of sedimentation tank, mix pond agitator motor add throw pond agitator motor with growth pond agitator motor all with the controller is connected.
The stirrer inside the regulating tank makes the water quality uniform, the high suspended matter mine water is fully mixed with the coagulant, the flocculant and the coal gangue sand through stirring reaction in the growth tank, and particles such as floc, coal gangue sand and floc combination in the water are further condensed and enlarged, so that the precipitation speed is accelerated.
Furthermore, a water outlet groove is formed in the upper portion of the side wall of the sedimentation tank, the water outlet is located in the water outlet groove, a sedimentation inclined pipe is arranged in the middle of the sedimentation tank, and the sedimentation inclined pipe is hexagonal honeycomb. The sedimentation tank plays the effect with water and flocculating constituent separation, and the inclined tube that deposits can effectively improve precipitation efficiency, and the inclined tube that deposits adopts the PVC material preparation.
A treatment method for treating a high-suspended matter mine water system by utilizing a coal gangue sand medium comprises the following steps:
s1, introducing high-suspended substance mine water into the water inlet unit for pretreatment, and allowing the pretreated high-suspended substance mine water to enter the mixing tank;
s2, adding a coagulant into the mixing tank, stirring and reacting, and then feeding into the adding tank;
s3, adding a coagulant and coal gangue sand into the adding pool, stirring and reacting, and then feeding into the growth pool;
s4, stirring and reacting in the growth tank, and then entering the sedimentation tank;
s5, standing the high-suspended substance mine water treated in the step S4 in the sedimentation tank, collecting sediments obtained by standing in the sludge discharge hopper, and discharging purified water obtained by standing from the water discharge port;
s6, enabling the sediment in the step S5 to enter the coal gangue sand reusing subsystem through the sludge discharge hopper, and throwing the sediment into the adding pool again after being treated by the coal gangue sand reusing subsystem;
and S7, the coal gangue sand supplementing subsystem puts the coal gangue sand into the adding pool.
Further, the method comprises the following steps:
s1, introducing high-suspended substance mine water into the inlet water for pretreatment, and stirring to react to ensure that the water quality is uniform, wherein the stirring strength is 30-50S-1The pretreated mine water with high suspended matter enters the mixing pool;
s2, adding a coagulant into the mixing tank, wherein the coagulant is PAC (Poly aluminum chloride), the concentration of the coagulant is 8-12mg/L, the adding amount of the coagulant is 10-50mg/L, the mixture enters the adding tank after stirring reaction, and the stirring intensity is 280S-320S--1；
S3, adding a flocculating agent and the coal gangue sand into the adding pool, wherein the flocculating agent is PAM, the concentration of the flocculating agent is 0.8-1.2mg/L, the adding amount of the flocculating agent is 1-5mg/L, the particle size of the coal gangue sand is 100-mesh and 180-mesh, the adding amount of the coal gangue sand is 1-8g/L, the mixture enters the growth pool after stirring reaction, and the stirring strength is 180-mesh 220S-1；
S4, stirring and reacting in the growth tank, and then feeding into the sedimentation tank, wherein the stirring intensity is 80-120S-1；
S5, standing the high-suspended substance mine water treated in the step S4 in the sedimentation tank for 40-60min, collecting sediments obtained by standing in the sludge discharge hopper, and discharging purified water obtained by standing from the water discharge outlet;
s6, enabling the sediment in the step S5 to enter the coal gangue sand reusing subsystem through the sludge discharge hopper, pressurizing the sediment through a pneumatic diaphragm pump, and enabling the sediment to enter a hydraulic cyclone, wherein the pressure at the inlet of the hydraulic cyclone is 3 multiplied by 105Pa, after the sediment is treated by the hydrocyclone, discharging the coal gangue sand in the sediment through a bottom flow port of the hydrocyclone, and putting the sediment into the feeding tank;
s7, the coal gangue sand supplementing subsystem puts the coal gangue sand into the adding pool, the coal gangue sand is prepared by the coal gangue sand preparing subsystem, the coal gangue with the Mohs hardness of 4-7 is put into a jaw crusher to be crushed roughly to obtain coarse coal gangue particles with the particle size of 20-60mm, the coarse coal gangue particles are put into a back-impact crusher to be crushed in the middle to obtain fine coal gangue particles with the particle size of 10-20mm, the fine coal gangue particles are put into a sand making machine to obtain coal gangue sand particles with the particle size of 80 meshes, the coal gangue sand particles are put into a pulverizer to obtain coal gangue sand with the particle size of 100-180 meshes, and the coal gangue sand is conveyed to the coal gangue sand supplementing subsystem to be put into the adding pool.
The adjusting tank is provided with water volume of 8-12h, the coal gangue sand is put into the adjusting tank to play a role of a condensation nucleus, small flocs in water grow on the surface of the coal gangue sand under the action of homodromous and heterodromous flocculation, and the size of the coal gangue sand condensation nucleus is much larger than that of the flocs growing on the surface of the coal gangue sand, so that the average mass of the flocs in unit volume is greatly improved, the sedimentation process of the flocs in water is dynamic balance of gravity, buoyancy and resistance, the mass of the flocs in unit volume is improved, and the sedimentation speed of the flocs is greatly improved.
Advantageous effects of the invention
1. The system can obviously improve the removal effect of suspended particles and colloids in mine water, and has the advantages of low investment cost, small operation pressure, high system load, small occupied area, high coal gangue utilization rate and the like.
2. The system has a complete coal gangue sand preparation and recovery system, realizes the recovery and utilization of coal gangue, has the recovery rate of the coal gangue of 99 percent, reduces the production cost, avoids hidden dangers of farmland, forest land and the like, landslide, debris flow and the like caused by stacking of the coal gangue, and simultaneously reduces the environmental pollution caused by spontaneous combustion of the coal gangue.
3. The method of the invention adds the coal gangue sand in the process of treating the high suspended substance mine water to treat waste by waste, the coal gangue sand can greatly accelerate the sedimentation speed of floc, improve the removal effect of suspended particles and colloid in the mine water, realize the recycling of the coal gangue sand and reduce the treatment cost.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a block diagram of an embodiment of the present invention;
FIG. 2 is a block diagram of a gangue sand reusing subsystem according to an embodiment of the present invention;
FIG. 3 is a block diagram of a gangue sand preparation subsystem in an embodiment of the present invention;
description of reference numerals:
in the figure: 1-a regulating tank, 2-a coagulant adding subsystem, 3-a flocculant adding subsystem, 4-a gangue sand supplementing subsystem, 5-a gangue sand reusing subsystem, 6-a sludge treatment subsystem, 7-a gangue sand preparing subsystem, 8-a pressure pump, 9-a water inlet, 10-a mixing tank, 11-a mixing tank stirring paddle, 12-a mixing tank stirring motor, 13-a adding tank, 14-a adding tank stirring paddle, 15-a adding tank stirring motor, 16-a growth tank, 17-a growth tank stirring paddle, 18-a growth tank stirring motor, 19-a sedimentation tank, 20-a water outlet tank, 21-a water outlet, 22-a sedimentation inclined pipe, 23-a sludge discharge hopper, 24-an oil-free mute air pump, 25-an electromagnetic valve, 26-pneumatic diaphragm pump, 27-inlet of pneumatic diaphragm pump, 28-outlet of pneumatic diaphragm pump, 29-pressure sensor, 30-ball valve, 31-inlet of hydraulic cyclone, 32-overflow pipe, 33-hydraulic cyclone, 34-underflow opening, 35-jaw crusher, 36-counterattack crusher, 37-sand making machine and 38-grinding machine.
Detailed Description
It is to be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention, unless otherwise specified, and all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. 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.
Example 1
As shown in fig. 1 to 3:
a system for treating high suspended matter mine water by coal gangue sand media comprises a water inlet unit and a treatment unit, wherein the water inlet unit comprises an adjusting tank 1, a stirrer is arranged in the adjusting tank 1, the adjusting tank is used for setting water quantity, the stirrer is used for stirring to enable the water quality to be uniform, the treatment unit comprises a mixing tank 10, an adding tank 13, a growth tank 16 and a sedimentation tank 19 which are sequentially connected, a water outlet of the adjusting tank 1 is connected with a water inlet 9 of the mixing tank through a water pipe, a pressure pump 8 is arranged on the water pipe, the high suspended matter mine water is extracted through the pressure pump 8, a mixing tank stirring paddle 11 is arranged in the mixing tank 10, the top end of the mixing tank stirring paddle 11 is connected with a mixing tank stirring motor 12, the mixing tank stirring motor 12 is positioned at the top of the mixing tank 10, the mixing tank stirring motor 12 is connected with a programmable logic controller S7-1200, and automatic control over the mixing tank stirring motor 12 is realized, the upper part of the mixing tank 10 is provided with a coagulant adding subsystem 2, the coagulant adding subsystem 2 comprises a coagulant tank, a coagulant metering pump and a first frequency converter, the coagulant tank is connected with the inlet of the coagulant metering pump through an adding pipe, the outlet of the coagulant metering pump is connected with the top of the mixing tank 10 through the adding pipe, the first frequency converter is respectively connected with the coagulant metering pump and a programmable logic controller S7-1200, the programmable logic controller S7-1200 is adopted to control the coagulant metering pump to automatically and quantitatively add the coagulant into the mixing tank 10 through the first frequency converter, and a mixing tank stirring paddle 11 is adopted to stir and react to fully mix the coagulant and the high-suspended substance mine water, so that the zeta potential of the particulate matters in the high-suspended substance mine water is reduced, and colloidal particles collide with each other and continuously grow under the action of homodromous and heterodromous.
The water outlet of the mixing tank 10 is communicated with the side wall of the adding tank 13, an adding tank stirring paddle 14 is arranged inside the adding tank 13, the top end of the adding tank stirring paddle 14 is connected with an adding tank stirring motor 15, the adding tank stirring motor 15 is positioned at the top of the adding tank 13, the adding tank stirring motor 15 is connected with a programmable logic controller S7-1200 to realize automatic control of the adding tank stirring motor 15, a flocculating agent adding subsystem 3, a coal gangue sand supplementing subsystem 4 and a coal gangue sand multiplexing subsystem 5 are arranged above the adding tank 13, the flocculating agent adding subsystem 3 comprises a flocculating agent tank, a flocculating agent metering pump and a second frequency converter, the flocculating agent tank is connected with the inlet of the flocculating agent metering pump through an adding pipe, the outlet of the flocculating agent metering pump is connected with the top of the adding tank 13 through an adding pipe, the second frequency converter is respectively connected with the flocculating agent metering pump and the programmable logic controller S7-1200, and (3) controlling a flocculating agent metering pump to automatically and quantitatively feed the flocculating agent into the feeding tank 13 by adopting a programmable logic controller S7-1200 through a second frequency converter, stirring and reacting by adopting a stirring paddle 14 of the feeding tank to fully mix the flocculating agent with the mine water of the high suspended matter treated by the mixing tank 10, and coagulating the micro flocculating agent in the water into larger flocculating agent under the actions of adsorption bridging, net catching, rolling and sweeping and the like.
The water outlet of the adding tank 13 is communicated with the side wall of the growth tank 16, a growth tank stirring paddle 17 is arranged in the growth tank 16, the top end of the growth tank stirring paddle 17 is connected with a growth tank stirring motor 18, the growth tank stirring motor 18 is positioned at the top of the growth tank 16, the growth tank stirring motor 18 is connected with a programmable logic controller S7-1200, automatic control over the growth tank stirring motor 18 is achieved, high-suspended matter mine water treated by the adding tank 13 enters the growth tank 16, particles such as flocs, coal gangue sand and floc combination in the water are further agglomerated and enlarged through stirring reaction, the water outlet of the growth tank 16 is communicated with the side wall of the sedimentation tank 19, and the high-suspended matter mine water treated by the growth tank 16 enters the sedimentation tank 19.
The upper part of the side wall of the sedimentation tank 19 is provided with a water outlet tank 20, the water outlet tank 20 is provided with a water outlet 21, the middle part of the sedimentation tank 19 is provided with a sedimentation inclined pipe 22, the bottom of the sedimentation tank 19 is provided with a sludge discharge hopper 23, the high-suspended substance mine water treated by the growth tank 16 is kept stand in the sedimentation tank 19, the sediment in the high-suspended substance mine water is gathered in the sludge discharge hopper 23 through the sedimentation inclined pipe 22, the purified water enters a subsequent treatment process through the water outlet 21 on the water outlet tank 20, and the sludge discharge hopper 23 is connected with the coal gangue sand multiplexing subsystem 5 through a feeding pipe.
The gangue sand reusing subsystem 5 comprises an electromagnetic valve 25, a ball valve 30, a pneumatic diaphragm pump 26, an oil-free mute air pump 24, a pressure sensor 29 and a hydrocyclone 33, wherein the oil-free mute air pump 24 is respectively connected with the electromagnetic valve 25 and the pneumatic diaphragm pump 26, the electromagnetic valve 25 is connected with a programmable logic controller S7-1200, the programmable logic controller S7-1200 is used for controlling the opening or closing of the oil-free mute air pump 24 through the electromagnetic valve 25, the oil-free mute air pump 24 is used for driving the pneumatic diaphragm pump 26, the flow rate of the pneumatic diaphragm pump 26 is controlled by controlling the air supply quantity of the oil-free mute air pump 24, an inlet 27 of the pneumatic diaphragm pump is connected with a sludge discharge hopper 23 through a pipeline, an outlet 28 of the pneumatic diaphragm pump is connected with an inlet 31 of the hydrocyclone through a pipeline, the pressure sensor 29 is positioned at the inlet 31 of the hydrocyclone, the ball valve 30 is positioned on a pipeline between the, sediment discharged from the sludge discharge hopper 23 enters the pneumatic diaphragm pump 26 through a pipeline between the sludge discharge hopper 23 and an inlet 27 of the pneumatic diaphragm pump, after the sediment is pressurized to a certain pressure value through the pneumatic diaphragm pump 26, a pressure sensor 29 transmits a signal to the programmable logic controller S7-1200, the opening of the ball valve 30 is controlled through the programmable logic controller S7-1200, the sediment enters the hydraulic cyclone 33, friction between the sediment and between the sediment and the inner wall of the hydraulic cyclone 33 is generated under the hydraulic action, so that the gangue sand is separated from flocs adhered to the gangue sand, an overflow pipe 32 is arranged at the top of the hydraulic cyclone 33, the overflow pipe 32 is connected with the sludge treatment subsystem 6, the sludge treatment subsystem 6 is a conventional sludge treatment device, and sludge water in the hydraulic cyclone 33 enters the sludge treatment subsystem 6 through the overflow pipe 32 for recovery treatment, the bottom of the hydraulic cyclone 33 is provided with a bottom flow port 34, the bottom flow port 34 is connected with the top of the adding tank 13 through an adding pipe, coarse coal gangue sand inside the hydraulic cyclone 33 is added into the adding tank 13 through the adding pipe, recycling of the coal gangue sand is achieved, the inner walls of the pneumatic diaphragm pump 26, the adding pipe, the pipeline and the hydraulic cyclone 33 are all made of polyurethane materials, abrasion resistance is improved, and durability is improved.
The coal gangue sand supplementing subsystem 4 comprises a powder feeder, the powder feeder is connected with the top of a feeding pool 13 through a feeding pipe, the powder feeder is connected with a programmable logic controller S7-1200, the programmable logic controller S7-1200 is adopted to control the powder feeder to supplement the loss amount of the coal gangue sand in the using process, the powder feeder is connected with a coal gangue sand preparing subsystem 7, the coal gangue sand preparing subsystem 7 comprises a jaw crusher 35, a back-impact crusher 36, a sand making machine 37 and a pulverizer 38 which are sequentially connected, the coal gangue is coarsely crushed in the jaw crusher 35, the coarsely crushed coal gangue is put into the back-impact crusher 36 for intermediate crushing, the intermediate crushed coal gangue is put into the sand making machine 37 to obtain coal gangue sand particles, the coal gangue sand particles are put into the pulverizer 38 for crushing, a vibrating screen is adopted to screen to obtain the coal gangue sand, the discharge port of the pulverizer is connected with a powder feeder through a material conveyer, and the prepared coal gangue sand is fed from the top of the feeding pool 13 through the powder feeder.
A treatment method for treating high-suspended matter mine water by using a coal gangue sand medium through the system comprises the following steps:
s1, introducing high-suspended substance mine water into a regulating tank 1 through a high-pressure pump 8 for pretreatment, setting the water quantity for 8 hours, stirring for reaction to enable the water quality to be uniform, wherein the stirring intensity is 30S-1The pretreated mine water with high suspended matter enters a mixing pool 10;
s2, adding a coagulant which is PAC (polyaluminium chloride) in the mixing tank 10, wherein the concentration of the coagulant is 8mg/L, the adding amount of the coagulant is 10mg/L, reducing the zeta potential of the particulate matters contained in the high-suspended matter mine water through stirring reaction, enabling colloidal particles to collide with each other and grow continuously under the action of homodromous and heterodromous flocculation, and the stirring intensity is 280S-1The treated mine water of the high suspended substance enters an adding pool 13;
s3, adding a flocculating agent and the coal gangue sand into the adding pool 13, wherein the flocculating agent is PAM, the concentration of the flocculating agent is 0.8mg/L, the adding amount of the flocculating agent is 1mg/L, the particle size of the coal gangue sand is 100 meshes, the adding amount of the coal gangue sand is 8g/L, and stirring and reactingThe tiny flocs in the high-suspended-matter mine water treated in the step S2 grow on the surface of the coal gangue sand under the action of homodromous and heterodromous flocculation, and are coagulated into larger flocs with the stirring strength of 180S-1Entering a growth tank 16;
s4, stirring and reacting in the growth tank 16 to further agglomerate and enlarge particles such as flocs, coal gangue sand, a combination of the coal gangue sand and the flocs in the high-suspended-matter mine water treated in the step S3, wherein the stirring strength is 80S-1And enters a sedimentation tank 19;
s5, standing the high-suspended substance mine water treated in the step S4 in a sedimentation tank 19 for 40min, collecting the precipitate obtained by standing in a mud and mud discharging hopper 23 through a sedimentation inclined pipe 22, and discharging the purified water obtained by standing from a water outlet 21 on a water outlet groove 20;
s6, enabling the sediment in the step S5 to enter the gangue sand reusing subsystem 5 through the mud discharging hopper 23, controlling the electromagnetic valve 25 to be started through the programmable logic controller S7-1200, controlling the electromagnetic valve 25 to drive the pneumatic diaphragm pump 26 to pressurize the sediment through controlling the oil-free mute air pump 24, enabling the rotating speed of the oil-free mute air pump 24 to be 1380r/min and the exhaust pressure to be 7 x 105Pa, the sediment is pressurized by an air-operated diaphragm pump 26, and the pressure at the inlet 31 of the hydrocyclone is 3X 105When Pa, the pressure sensor 29 transmits a signal to the programmable logic controller S7-1200, the programmable logic controller S7-1200 controls the ball valve 30 to open, the sediment enters the inside of the hydrocyclone 33, friction is generated between the sediment and between the sediment and the inner wall of the hydrocyclone 33 under the action of water power, so that the gangue sand is separated from the floc adhered on the gangue sand, the gangue sand overcomes the resistance of the water power to move towards the inner wall of the hydrocyclone 33 under the common action of self gravity, the fine separated floc and most of the muddy water start to make rotary motion without approaching the inner wall of the hydrocyclone 33 because of the small centrifugal force, and the particle size is pushed to be larger towards the inner wall of the hydrocyclone 33 from the center under the pressure at the inlet 31 of the hydrocyclone, forming a layered arrangement with separated sediment flowing from the column portion of the hydrocyclone 33The flow section of the cone part is smaller and smaller, under the contraction and compression of large-particle coal gangue sand on the outer layer, the inner layer area containing the slime water has to change the direction and moves upwards to form an inner rotational flow, the inner rotational flow is discharged from the overflow pipe 32 and enters the slime treatment subsystem 6 for recovery treatment, and the coarse coal gangue sand is discharged from the underflow port 34 and is thrown into the top of the feeding tank 13;
s7, preparing coal gangue sand by using a coal gangue sand preparation subsystem 7, putting coal gangue with Mohs hardness of 4 into a jaw crusher 35 for coarse crushing to obtain coarse coal gangue particles with the particle size of 20mm, putting the coarse coal gangue particles into a counterattack crusher 36 for medium crushing to obtain fine coal gangue particles with the particle size of 10mm, putting the fine coal gangue particles into a sand making machine 37 to obtain coal gangue sand particles with the particle size of 80 meshes, putting the coal gangue sand particles into a grinding machine 38 for crushing, screening by using a vibrating screen to obtain coal gangue sand with the particle size of 100 meshes, conveying the coal gangue sand to a coal gangue sand supplement subsystem 4, and putting the coal gangue sand from the top of a feeding pool 13 through a powder feeder.
Example 2
The structure of a system for treating high-suspended substance mine water by using a coal gangue sand medium is the same as that in embodiment 1.
A treatment method for treating high-suspended matter mine water by using a coal gangue sand medium through the system comprises the following steps:
s1, introducing high-suspended substance mine water into a regulating tank 1 through a high-pressure pump 8 for pretreatment, setting the water quantity for 10 hours, stirring for reaction to enable the water quality to be uniform, and stirring the water with the stirring intensity of 40S-1The pretreated mine water with high suspended matter enters a mixing pool 10;
s2, adding a coagulant which is PAC (polyaluminium chloride) into the mixing tank 10, wherein the concentration of the coagulant is 10mg/L, the adding amount of the coagulant is 30mg/L, reducing the zeta potential of the particulate matters contained in the high-suspended matter mine water through stirring reaction, enabling colloidal particles to collide with each other and grow continuously under the action of homodromous and heterodromous flocculation, and the stirring intensity is 300S-1The treated mine water of the high suspended substance enters an adding pool 13;
s3, adding a flocculating agent and the coal gangue sand into the adding pool 13, wherein the flocculating agent is PAM, the concentration of the flocculating agent is 1mg/L, and the flocculating agentThe adding amount of the coal gangue sand is 3mg/L, the grain diameter of the coal gangue sand is 140 meshes, the adding amount of the coal gangue sand is 4g/L, the micro flocs in the high suspended substance mine water treated by the step S2 grow on the surface of the coal gangue sand under the action of homodromous and heterodromous flocculation through stirring reaction, the micro flocs are aggregated into larger flocs, and the stirring strength is 200S-1Entering a growth tank 16;
s4, stirring and reacting in the growth tank 16 to further agglomerate and enlarge particles such as flocs, coal gangue sand, a combination of the coal gangue sand and the flocs in the high-suspended-matter mine water treated in the step S3, wherein the stirring strength is 100S-1And enters a sedimentation tank 19;
s5, standing the high-suspended substance mine water treated in the step S4 in a sedimentation tank 19 for 50min, collecting the precipitate obtained by standing in a mud and mud discharging hopper 23 through a sedimentation inclined pipe 22, and discharging the purified water obtained by standing from a water outlet 21 on a water outlet groove 20;
s6, enabling the sediment in the step S5 to enter the gangue sand reusing subsystem 5 through the mud discharging hopper 23, controlling the electromagnetic valve 25 to be started through the programmable logic controller S7-1200, controlling the electromagnetic valve 25 to drive the pneumatic diaphragm pump 26 to pressurize the sediment through controlling the oil-free mute air pump 24, enabling the rotating speed of the oil-free mute air pump 24 to be 1380r/min and the exhaust pressure to be 7 x 105Pa, the sediment is pressurized by an air-operated diaphragm pump 26, and the pressure at the inlet 31 of the hydrocyclone is 3X 105Pa, the pressure sensor 29 sends a signal to the programmable logic controller S7-1200, the programmable logic controller S7-1200 controls the ball valve 30 to open, the sediment enters the interior of the hydrocyclone 33, the friction between the sediment and between the sediment and the inner wall of the hydrocyclone 33 is generated under the hydraulic action, so that the coal gangue sand is separated from the floc adhered on the coal gangue sand, because of the different magnitudes of centrifugal force, centripetal buoyancy, fluid force and the like, the coal gangue sand moves to the inner wall of the hydrocyclone 33 by overcoming the hydraulic resistance, under the combined action of self gravity, the water flows downwards spirally along the inner wall of the hydrocyclone 33, the fine and small separated flocs and most of sludge water start to rotate without approaching the inner wall of the hydrocyclone 33 because of small centrifugal force, and the particle size of the particles is pushed to water from the center under the push of the pressure at the inlet 31 of the hydrocyclone.The inner wall of the hydrocyclone 33 is larger and larger to form layered arrangement, the flow section is smaller and smaller along with the flow of separated sediments from the cylinder part to the cone part of the hydrocyclone 33, the inner layer area containing the slime water has to change the direction under the contraction and compression of large-particle coal gangue sand on the outer layer and moves upwards to form an inner rotational flow, the inner rotational flow is discharged from the overflow pipe 32 and enters the slime treatment subsystem 6 for recovery treatment, and the coarse coal gangue sand is discharged from the underflow port 34 and is thrown from the top of the feeding tank 13;
s7, preparing the coal gangue sand by using a coal gangue sand preparation subsystem 7, putting the coal gangue with the Mohs hardness of 4 into a jaw crusher 35 for coarse crushing to obtain coarse coal gangue particles with the particle size of 40mm, putting the coarse coal gangue particles into a counterattack crusher 36 for medium crushing to obtain fine coal gangue particles with the particle size of 15mm, putting the fine coal gangue particles into a sand making machine 37 to obtain coal gangue sand particles with the particle size of 80 meshes, putting the coal gangue sand particles into a grinding machine 38 for crushing, screening by using a vibrating screen to obtain coal gangue sand with the particle size of 140 meshes, conveying the coal gangue sand to a coal gangue sand supplement subsystem 4, and putting the coal gangue sand from the top of a feeding pool 13 through a powder feeder.
Example 3
The structure of a system for treating high-suspended substance mine water by using a coal gangue sand medium is the same as that in embodiment 1.
A treatment method for treating high-suspended matter mine water by using a coal gangue sand medium through the system comprises the following steps:
s1, introducing high-suspended substance mine water into a regulating tank 1 through a high-pressure pump 8 for pretreatment, setting the water quantity for 12 hours, stirring for reaction to enable the water quality to be uniform, and stirring the water with the stirring intensity of 50S-1The pretreated mine water with high suspended matter enters a mixing pool 10;
s2, adding a coagulant which is PAC (polyaluminium chloride) into the mixing tank 10, wherein the concentration of the coagulant is 12mg/L, the adding amount of the coagulant is 50mg/L, reducing the zeta potential of the particulate matters contained in the high-suspended matter mine water through stirring reaction, enabling colloidal particles to collide with each other and grow continuously under the action of homodromous and heterodromous flocculation, and the stirring intensity is 320S-1The treated mine water of the high suspended substance enters an adding pool 13;
s3, adding a flocculating agent and the coal gangue sand into the adding pool 13, wherein the flocculating agent is PAM, the concentration of the flocculating agent is 1.2mg/L, the adding amount of the flocculating agent is 5mg/L, the particle size of the coal gangue sand is 180 meshes, the adding amount of the coal gangue sand is 1g/L, the tiny flocs in the high-suspension mine water treated in the step S2 grow on the surface of the coal gangue sand under the action of homodromous and heterodromous flocculation through stirring reaction and are condensed into larger flocs, and the stirring strength is 220S-1Entering a growth tank 16;
s4, stirring and reacting in the growth tank 16 to further agglomerate and enlarge particles such as flocs, coal gangue sand, a combination of the coal gangue sand and the flocs in the high-suspended-matter mine water treated in the step S3, wherein the stirring strength is 120S-1And enters a sedimentation tank 19;
s5, standing the high-suspended substance mine water treated in the step S4 in a sedimentation tank 19 for 60min, collecting the precipitate obtained by standing in a mud and mud discharging hopper 23 through a sedimentation inclined pipe 22, and discharging the purified water obtained by standing from a water outlet 21 on a water outlet groove 20;
s6, enabling the sediment in the step S5 to enter the gangue sand reusing subsystem 5 through the mud discharging hopper 23, controlling the electromagnetic valve 25 to be started through the programmable logic controller S7-1200, controlling the electromagnetic valve 25 to drive the pneumatic diaphragm pump 26 to pressurize the sediment through controlling the oil-free mute air pump 24, enabling the rotating speed of the oil-free mute air pump 24 to be 1380r/min and the exhaust pressure to be 7 x 105Pa, the sediment is pressurized by an air-operated diaphragm pump 26, and the pressure at the inlet 31 of the hydrocyclone is 3X 105When Pa is needed, a signal is transmitted to the programmable logic controller S7-1200 by the pressure sensor 29, the programmable logic controller S7-1200 controls the ball valve 30 to be opened, the sediment enters the inside of the hydrocyclone 33, friction is generated between the sediment and between the sediment and the inner wall of the hydrocyclone 33 under the action of water power, so that the gangue sand is separated from the bonded floc on the gangue sand, the gangue sand overcomes the hydraulic resistance to move towards the inner wall of the hydrocyclone 33 due to the difference of the centrifugal force, the centripetal buoyancy, the fluid force and the like, and the gangue sand spirally moves downwards along the inner wall of the hydrocyclone 33 under the combined action of the gravity of the fine separated floc and most of the muddy water, which are not close to the hydrocyclone 33 because the centrifugal force is smallThe inner wall of the flow device 33 starts to make rotary motion, under the pushing of the pressure at the inlet 31 of the hydrocyclone, the particle size of the particles is larger from the center to the inner wall of the hydrocyclone 33 to form layered arrangement, the flow section is smaller and smaller along with the flow of the separated sediment from the cylinder part of the hydrocyclone 33 to the cone part, under the contraction and compression of large-particle gangue sand at the outer layer, the inner layer area containing the slime water has to change the direction and moves upwards to form an inner rotational flow, the inner rotational flow is discharged from the overflow pipe 32 and enters the slime processing subsystem 6 for recovery processing, and the coarse gangue sand is discharged from the underflow port 34 and is thrown from the top of the feeding pool 13;
s7, preparing coal gangue sand by using a coal gangue sand preparation subsystem 7, putting coal gangue with Mohs hardness of 4 into a jaw crusher 35 for coarse crushing to obtain coarse coal gangue particles with the particle size of 60mm, putting the coarse coal gangue particles into a counterattack crusher 36 for medium crushing to obtain fine coal gangue particles with the particle size of 20mm, putting the fine coal gangue particles into a sand making machine 37 to obtain coal gangue sand particles with the particle size of 80 meshes, putting the coal gangue sand particles into a grinding machine 38 for crushing, screening by using a vibrating screen to obtain coal gangue sand with the particle size of 180 meshes, conveying the coal gangue sand to a coal gangue sand supplement subsystem 4, and putting the coal gangue sand from the top of a feeding pool 13 through a powder feeder.
Test example
The test water is coal mine water in the chenchentai city of the Hebei province, the water amount is 48t/d, and the concentration of each pollutant in the test water is as follows: pH 7.21, turbidity 302NTU, SS 272.65mg/L, oil 3.64mg/L, CODcr 253.
The pretreatment system and the pretreatment method for treating the high-suspended matter mine water by using the coal gangue sand medium in the embodiment 1 are adopted for treatment, and the concentrations of pollutants in the treated test water are as follows: pH 7.13, turbidity 8.40NTU, SS 18.24mg/L, oil 1.97mg/L, CODcr 17.71; the removal rates were respectively: the turbidity removal rate was 97.22%, the SS removal rate was 93.31%, the oil removal rate was 45.88%, and the CODcr removal rate was 93%.
From the test results, the mine water treated by the system and the method for treating the high-suspended matter mine water by using the coal gangue sand medium in the embodiment 1 meets the requirement of the coal mining wastewater emission limit value in GB20426-2006 discharge Standard for pollutants for the coal industry, and can reach the standard emission.
By adopting the technical scheme of the invention, high-suspended substance mine water enters the treatment unit through the water inlet unit, the coagulant adding subsystem adds coagulant into the water and uniformly stirs the coagulant, then the flocculant adding subsystem and the coal gangue sand reusing subsystem respectively add flocculant and coal gangue sand into the water and uniformly stir the coagulant, flocs further grow through the growth pool and then enter the sedimentation tank for standing and sedimentation, the sediment realizes the reuse of coal gangue through the coal gangue sand reusing subsystem, and the lost coal gangue sand is supplemented through the coal gangue sand supplementing subsystem by the coal gangue sand preparation subsystem.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A system for treating high suspended matter mine water by coal gangue sand medium is characterized in that: including water inlet unit and processing unit, processing unit is including the mixing tank that connects gradually, add pond, growth pond and sedimentation tank, water inlet unit's delivery port with the water inlet of mixing tank is connected, the top of mixing tank is equipped with the coagulant and adds the feeding subsystem, the top of adding the pond is equipped with the flocculating agent and adds feeding subsystem, the multiplexing subsystem of coal gangue sand and supplyes the subsystem, the bottom of sedimentation tank is equipped with the mud discharge fill, the mud discharge fill with the multiplexing subsystem of coal gangue sand is connected, the lateral wall upper portion of sedimentation tank is equipped with the outlet.
2. The system for treating high suspended matter mine water by using the coal gangue sand medium as claimed in claim 1, wherein the system comprises: the gangue sand reusing subsystem comprises an electromagnetic valve, a ball valve, a pneumatic diaphragm pump, an oil-free mute air pump, a pressure sensor and a hydrocyclone;
the oil-free mute air pump is respectively connected with the electromagnetic valve and the pneumatic diaphragm pump, the pneumatic diaphragm pump is respectively connected with the sludge discharge hopper and the hydrocyclone through pipelines, the pressure sensor is positioned at the inlet of the hydrocyclone, the ball valve is positioned on the pipeline between the pneumatic diaphragm pump and the hydrocyclone, and the electromagnetic valve, the ball valve and the pressure sensor are all connected with the controller;
the top of the hydrocyclone is provided with an overflow pipe, the bottom of the hydrocyclone is provided with a underflow port, and the underflow port is connected with the top of the adding pool through an adding pipe.
3. The system for treating high suspended matter mine water by using the coal gangue sand medium as claimed in claim 2, wherein the system comprises: the processing unit also comprises a sludge processing subsystem, and the sludge processing subsystem is connected with the overflow pipe.
4. The system for treating high suspended matter mine water by using the coal gangue sand medium as claimed in claim 2, wherein the system comprises: the gangue sand replenishing subsystem comprises a powder feeder, the powder feeder is connected with the top of the feeding pool through a feeding pipe, and the powder feeder is connected with the controller.
5. The system for treating high suspended matter mine water by using the coal gangue sand medium as claimed in claim 4, wherein the system comprises: the coal gangue sand supplementing subsystem is connected with the coal gangue sand preparation subsystem, the coal gangue sand preparation subsystem comprises a jaw crusher, an impact crusher, a sand making machine and a flour mill which are connected in sequence, and a discharge port of the flour mill is connected with the powder feeder through a material conveying machine.
6. The system for treating high suspended matter mine water by using the coal gangue sand medium as claimed in claim 2, wherein the system comprises: the system comprises a coagulant dosing subsystem, a controller and a controller, wherein the coagulant dosing subsystem comprises a coagulant tank, a coagulant metering pump and a first frequency converter, the coagulant tank is connected with an inlet of the coagulant metering pump through a dosing pipe, an outlet of the coagulant metering pump is connected with the top of a dosing pool through a dosing pipe, and the first frequency converter is respectively connected with the coagulant metering pump and the controller;
the flocculant comprises a flocculant medicine tank, a flocculant metering pump and a second frequency converter, wherein the flocculant medicine tank is connected with an inlet of the flocculant metering pump through an adding pipe, an outlet of the flocculant metering pump is connected with the top of an adding pool through an adding pipe, and the second frequency converter is respectively connected with the flocculant metering pump and the controller.
7. The system for treating high suspended matter mine water by using the coal gangue sand medium as claimed in claim 2, wherein the system comprises: the water inlet unit comprises an adjusting tank, a stirrer is arranged in the adjusting tank, a water outlet of the adjusting tank is connected with a water inlet of the mixing tank through a water conveying pipe, and a pressure pump is arranged on the water conveying pipe;
a mixing tank stirring paddle is arranged in the mixing tank, the top end of the mixing tank stirring paddle is connected with a mixing tank stirring motor, the mixing tank stirring motor is positioned at the top of the mixing tank, and a water outlet of the mixing tank is communicated with the side wall of the adding tank;
a stirring paddle of the feeding tank is arranged in the feeding tank, the top end of the stirring paddle of the feeding tank is connected with a stirring motor of the feeding tank, the stirring motor of the feeding tank is positioned at the top of the feeding tank, and a water outlet of the feeding tank is communicated with the side wall of the growth tank;
the inside in growth pond is equipped with growth pond agitator paddle, the top and the growth pond agitator motor of growth pond agitator paddle are connected, growth pond agitator motor is located the top in growth pond, the delivery port in growth pond with the lateral wall intercommunication of sedimentation tank, mix pond agitator motor add throw pond agitator motor with growth pond agitator motor all with the controller is connected.
8. The system for treating high suspended matter mine water by using the coal gangue sand medium as claimed in claim 1, wherein the system comprises: the upper part of the side wall of the sedimentation tank is provided with a water outlet groove, the water outlet is positioned on the water outlet groove, the middle part of the sedimentation tank is provided with a sedimentation inclined pipe, and the sedimentation inclined pipe is hexagonal honeycomb.
9. A method of treating a high suspended solids mine water system using the gangue sand media as claimed in any one of claims 1 to 8, wherein: the method comprises the following steps:
s1, introducing high-suspended substance mine water into the water inlet unit for pretreatment, and allowing the pretreated high-suspended substance mine water to enter the mixing tank;
s2, adding a coagulant into the mixing tank, stirring and reacting, and then feeding into the adding tank;
s3, adding a coagulant and coal gangue sand into the adding pool, stirring and reacting, and then feeding into the growth pool;
s4, stirring and reacting in the growth tank, and then entering the sedimentation tank;
s5, standing the high-suspended substance mine water treated in the step S4 in the sedimentation tank, collecting sediments obtained by standing in the sludge discharge hopper, and discharging purified water obtained by standing from the water discharge port;
s6, enabling the sediment in the step S5 to enter the coal gangue sand reusing subsystem through the sludge discharge hopper, and throwing the sediment into the adding pool again after being treated by the coal gangue sand reusing subsystem;
and S7, the coal gangue sand supplementing subsystem puts the coal gangue sand into the adding pool.
10. The processing method according to claim 9, characterized in that: the method comprises the following steps:
s1, introducing high-suspended substance mine water into the water inlet unit for pretreatment, and stirring for reaction to enable water to be in a reaction stateThe quality is uniform, and the stirring intensity is 30-50S-1The pretreated mine water with high suspended matter enters the mixing pool;
s2, adding a coagulant into the mixing tank, wherein the coagulant is PAC (Poly aluminum chloride), the concentration of the coagulant is 8-12mg/L, the adding amount of the coagulant is 10-50mg/L, the mixture enters the adding tank after stirring reaction, and the stirring intensity is 280S-320S--1；
S3, adding a flocculating agent and the coal gangue sand into the adding pool, wherein the flocculating agent is PAM, the concentration of the flocculating agent is 0.8-1.2mg/L, the adding amount of the flocculating agent is 1-5mg/L, the particle size of the coal gangue sand is 100-mesh and 180-mesh, the adding amount of the coal gangue sand is 1-8g/L, the mixture enters the growth pool after stirring reaction, and the stirring strength is 180-mesh 220S-1；
S4, stirring and reacting in the growth tank, and then feeding into the sedimentation tank, wherein the stirring intensity is 80-120S-1；
S5, standing the high-suspended substance mine water treated in the step S4 in the sedimentation tank for 40-60min, collecting sediments obtained by standing in the sludge discharge hopper, and discharging purified water obtained by standing from the water discharge outlet;
s6, enabling the sediment in the step S5 to enter the coal gangue sand reusing subsystem through the sludge discharge hopper, pressurizing the sediment through a pneumatic diaphragm pump, and enabling the sediment to enter a hydraulic cyclone, wherein the pressure at the inlet of the hydraulic cyclone is 3 multiplied by 105Pa, after the sediment is treated by the hydrocyclone, discharging the coal gangue sand in the sediment through a bottom flow port of the hydrocyclone, and putting the sediment into the feeding tank;
s7, the coal gangue sand supplementing subsystem puts the coal gangue sand into the adding pool, the coal gangue sand is prepared by the coal gangue sand preparing subsystem, the coal gangue with the Mohs hardness of 4-7 is put into a jaw crusher to be crushed roughly to obtain coarse coal gangue particles with the particle size of 20-60mm, the coarse coal gangue particles are put into a back-impact crusher to be crushed in the middle to obtain fine coal gangue particles with the particle size of 10-20mm, the fine coal gangue particles are put into a sand making machine to obtain coal gangue sand particles with the particle size of 80 meshes, the coal gangue sand particles are put into a pulverizer to obtain coal gangue sand with the particle size of 100-180 meshes, and the coal gangue sand is conveyed to the coal gangue sand supplementing subsystem to be put into the adding pool.
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Application publication date: 20210611 |