CN214654143U

CN214654143U - Underground coal mine muddy water treatment and reuse system

Info

Publication number: CN214654143U
Application number: CN202120502083.XU
Authority: CN
Inventors: 崔东锋; 郭中权; 郑利祥; 杨建超; 高杰; 魏然; 周如禄; 张军
Original assignee: Hangzhou Research Institute Co ltd
Current assignee: Hangzhou Research Institute Co ltd
Priority date: 2021-03-09
Filing date: 2021-03-09
Publication date: 2021-11-09
Anticipated expiration: 2031-03-09

Abstract

The utility model relates to a colliery is reuse system of muddy water treatment in pit, this system includes the solid-liquid separation unit who gets rid of the big particle size particulate matter in the coal slime water through vibration separation, cyclone separation and filtration mode, get rid of the pre-treatment unit of suspended particulate matter, floc and colloid in the coal slime water through precipitation, clarification and filtration mode, get rid of the ultra-filtration unit of suspended particulate matter, floc and colloid in the coal slime water through self-cleaning filtration and ultra-filtration membrane filtration mode, and, reduce the reverse osmosis treatment unit of dissolubility solid and ionic content in the coal slime water through security personnel's filtration and reverse osmosis membrane filtration mode; the solid-liquid separation unit, the pretreatment unit, the ultrafiltration treatment unit and the reverse osmosis treatment unit are connected in sequence through pipelines. This colliery is multiplexing system of coal slime water treatment in pit effectively reduces the coal slime water treatment degree of difficulty in the pit, avoids the sump siltation, reduces the lift-well and handles the energy consumption, improves coal slime aquatic particulate matter and gets rid of efficiency, improves the multiplexing degree in the pit of mine water.

Description

Underground coal mine muddy water treatment and reuse system

Technical Field

The utility model relates to a colliery coal slime water treatment multiplexing system and method, in particular to colliery coal slime water treatment multiplexing system belongs to environmental protection technical field.

Background

The coal productivity and the number of coal mines in China are the top of the world, and the coal mine water and slime water discharge amount generated every year is also the top of the world. The coal slurry is formed by mixing mine water and impurities such as coal particles, coal dust, rock dust and the like, and mainly comes from underground working faces, roadways, goafs and the like. The coal slime has high content of particulate matter in water and various particle size distribution, and is easy to deposit and block in the converging process from the underground working surface to a water sump. The long-time silting of coal slime can increase the coal slime layer thickness in sedimentation tank, the sump, seriously reduces sump holding capacity, brings very big challenge for preventing becoming silted up drainage in the pit, and then influences the normal production of mine.

In the conventional treatment method, underground coal slime water is directly lifted to the ground and then treated. The slime water can be deposited in ditches, ditches and water bins due to the change of flow velocity in the underground transferring and lifting process. The deposited coal slime is mainly cleaned manually, and the traditional method has the advantages of low mechanization level, high danger coefficient, high labor intensity and low cleaning efficiency. And the conventional treatment of the slime water mainly aims at removing particulate matters, and the reuse is less considered. The mine water only removing particulate impurities such as coal particulate matters, coal dust, rock powder and the like is not beneficial to underground depth reuse. At present, the conventional process adopted for treating the slime water is 'primary sedimentation-coagulation-sedimentation-filtration'. The primary sedimentation mode is a horizontal sedimentation tank reconstructed by a roadway, but precipitated coal slime slag can not be effectively removed, and the labor intensity of manual dredging is increased. The addition amount is large, the reaction time is long, and the treatment cost is high in the coagulation process. The effluent treated by the conventional process has low water quality, still contains organic matters, ammonia nitrogen, emulsified oil, salts and other toxic and harmful ions, and limits the approach and the degree of the reuse of the slime water treatment.

In a word, the reuse treatment of the slime water firstly needs to solve the problem of slime siltation. Secondly, the ground slime water treatment process is advanced to the underground for direct treatment, so that a large amount of slime water well-raising energy consumption can be saved, the abrasion of impurities such as particles in the slime water on the pipeline and parts such as an impeller and a volute of the pump is relieved, and the pipeline blockage, the system fault frequency and the extra maintenance cost are reduced. And thirdly, the coal slime water is directly and deeply treated in the underground, and the high-quality effluent is reused, so that the ascending discharge capacity of the coal slime water and the laying investment and operation management risk of underground reuse pipelines can be reduced.

Therefore, the utility model relates to a directly handle multiplexing system and method to coal slime water in the pit, both can the energy saving, can also reduce the siltation phenomenon in the pit, handle the pit water degree of depth in the pit simultaneously, increase the multiplexing degree of pit water, have the significance to colliery safety in production and sustainable development.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a colliery is multiplexing system of colliery underground coal muddy water processing reduces the underground coal slime water and handles the degree of difficulty, avoids the sump siltation, reduces the well-lifting and handles the energy consumption, improves coal slime aquatic particulate matter and gets rid of efficiency, improves the multiplexing degree in the pit of mine water, solves the background art in the problem.

The utility model provides a technical scheme that its technical problem adopted is:

a coal mine underground coal mud water treatment multiplexing system comprises a solid-liquid separation unit for removing large-particle-size particles in coal slime water in vibration separation, cyclone separation and filtration modes, a pretreatment unit for removing suspended particles, flocs and colloids in the coal slime water in precipitation, clarification and filtration modes, an ultrafiltration treatment unit for removing the suspended particles, the flocs and the colloids in the coal slime water in self-cleaning filtration and ultrafiltration membrane filtration modes, and a reverse osmosis treatment unit for reducing the content of soluble solids and ions in the coal slime water in security filtration and reverse osmosis membrane filtration modes; the solid-liquid separation unit, the pretreatment unit, the ultrafiltration treatment unit and the reverse osmosis treatment unit are connected in sequence through pipelines.

Preferably, the solid-liquid separation unit comprises a vibrating screen solid-liquid separation device, a high-precision cyclone separator, an ultra-precision filter screen device, a coal slime conveying belt, a collecting tank, a water inlet pump, a primary buffer water tank and a secondary buffer water tank; the vibrating screen solid-liquid separation device and the ultra-precision filter screen device are both provided with a solid outlet and a liquid outlet, the solid outlet of the vibrating screen solid-liquid separation device and the solid outlet of the ultra-precision filter screen device are both connected with a coal slurry conveying belt, the liquid outlet of the vibrating screen solid-liquid separation device is sequentially connected with a collecting tank and a high-precision cyclone separator, and the liquid outlet of the ultra-precision filter screen device is sequentially connected with a primary buffer water tank and an ultra-precision cyclone separator; high accuracy hydrocyclone and super precision hydrocyclone all are equipped with top overflow mouth and bottom discharge mouth, and second grade surge tank is all connected to the top overflow mouth of high accuracy hydrocyclone and super precision hydrocyclone's top overflow mouth, and super precision filter sieve device is all connected to the bottom discharge mouth of high accuracy hydrocyclone and super precision hydrocyclone's bottom discharge mouth.

Preferably, the solid-liquid separation device of the vibrating screen is sequentially provided with a first vibrator, a first vibrating screen, a first undersize collecting hopper and a first collecting pipe from top to bottom, the first vibrating screen is arranged at an inclined angle, the outlet end of the first vibrating screen is positioned above the coal slime conveying belt, and the first collecting pipe is connected with the collecting tank; the ultra-precision filter sieve device is sequentially provided with a second vibrator, a second vibrating screen, a second undersize collecting hopper and a second collecting pipe from top to bottom, the second vibrating screen is arranged at an inclined angle, the outlet end of the second vibrating screen is positioned above the coal slime conveying belt, and the second collecting pipe is connected with a first-level buffer water tank.

Preferably, the vibration frequency of the first vibration screen is 20-30 Hz, the diameter of a screen hole is 3.0-5.0 mm, the double amplitude is 2.0-3.0 mm, and the inclination angle of the screen surface is 5-8 degrees; the second vibrating screen has the vibration frequency of 30-35 Hz, the screen hole size of 0.5-1.0 mm, the double amplitude of 3.0-5.0 mm and the screen surface inclination angle of 7-9 degrees.

Preferably, the pretreatment unit comprises a pre-settling tank, a high-efficiency clarification tank, a mutual flushing filter and a coagulant dosing device, wherein the pre-settling tank, the high-efficiency clarification tank and the mutual flushing filter are sequentially connected through a pipeline, and the coagulant dosing device is connected with the high-efficiency clarification tank.

Preferably, the upper part in the high-efficiency clarifying tank is provided with an aeration pipe and a plurality of inclined plates, the lower part in the high-efficiency clarifying tank is provided with a rotary mud scraper, and the top of the high-efficiency clarifying tank is provided with a traction motor; the top of the inclined plate is provided with a horizontal traction rod movably connected with the inclined plate, one end of the horizontal traction rod is elastically connected with the wall of the high-efficiency clarification tank, and the other end of the horizontal traction rod is connected with a traction motor; the bottom of the inclined plate is provided with a horizontal fixed rod movably connected with the inclined plate, the horizontal fixed rod is fixedly connected with the wall of the high-efficiency settling pond, and the aeration pipe is arranged below the horizontal fixed rod.

Preferably, the inclined plates are uniformly distributed in parallel, the horizontal inclination angle of each inclined plate is 45-65 degrees, the reversible angle range of each inclined plate is 50-90 degrees, and the arrangement distance of the inclined plates is 10-20 cm; the aeration pipe is equipped with a plurality of aeration holes that are the annular equipartition, and the aperture of aeration hole is 5~10mm, and the interval of arranging of aeration hole is 10~20 cm.

Preferably, the ultrafiltration treatment unit comprises a self-cleaning filter, an ultrafiltration device and an oxidation-reduction agent feeding device which are sequentially connected through a pipeline, and the reverse osmosis treatment unit comprises a cartridge filter, a reverse osmosis device and a scale inhibitor feeding device which are sequentially connected through a pipeline.

The utility model has the advantages that:

(1) the utility model carries out underground treatment on the slime water, compared with ground treatment, the underground treatment device can save the energy consumption cost and the occupied area of the slime water for lifting the shaft, and can also avoid the influence of secondary pollutants in the slime water treatment on the ground environment;

(2) the utility model discloses lay underground coal slime water processing system and handle before main drainage storehouse or central water warehouse, compare the sump aftertreatment, can get rid of most sediment such as cinder, coal slime and rock dust in the coal slime water in advance, prevent effectively that the sedimentation of ditch, ditch and sump that the coal slime water is transported the in-process and arouse in the process, reduce desilting operation intensity and water damage risk in the pit;

(3) compared with the prior single solid-liquid separation technology, the utility model combines the vibration screening principle with the hydraulic cyclone separation principle in the solid-liquid separation unit, couples the solid-liquid separation technologies such as vibration screen, cyclone, filter screen and gravity concentration aiming at the difference of particle diameter, density and viscosity of the particles in the coal slime water, and combines the automatic control technology to improve the pertinence and the broad spectrum for removing the particles with different particle diameters in the coal slime water;

(4) compared with the prior coagulating sedimentation tank technology, the utility model adds the inclined plate part in the separating chamber of the clarification tank in the pretreatment unit, improves the mud-water separation effect by utilizing the shallow tank sedimentation principle, and designs the inclined plate mechanical turnover mechanism and the bottom aeration device simultaneously to prevent the deposition and clogging of high-concentration high-viscosity coal slime on the inclined plate after long-term operation;

(5) present slime water underground treatment process only accomplishes to get rid of the purification discharge technology that the particulate matter is given first place to, considers the multiplexing problem of mine water behind the slime water treatment very few, the utility model discloses extend underground slime water treatment process flow, add ultrafiltration and reverse osmosis process, further carry out advanced treatment with the mine water after purifying, improve mine water play water quality of water, enlarge the multiplexing degree of depth and the width of mine water in the pit.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic diagram of the system structure of the present invention;

FIG. 2 is a schematic structural diagram of a solid-liquid separation unit in the present invention;

fig. 3 is a schematic structural view of the middle high-efficiency clarification tank of the utility model.

In the figure: 1. a solid-liquid separation unit, 2, a pretreatment unit, 3, an ultrafiltration treatment unit, 4, a reverse osmosis treatment unit, 11, a vibrating screen solid-liquid separation device, 12, a high-precision cyclone separator, 13, a super-precision cyclone separator, 14, a super-precision filter screen device, 15, a coal slime conveying belt, 21, a pre-sedimentation tank, 22, a high-efficiency clarification tank, 23, a mutual flushing filter, 24, a coagulant adding device, 25, a coal slime tank, 26, a homogenizing tank, 31, a self-cleaning filter, 32, an ultrafiltration membrane component device, 33, an oxidation reducing agent adding device, 41, a security filter, 42, a reverse osmosis device, 43, a scale inhibitor adding device, 101, a first vibrator, 102, a first vibrating screen, 103, a first undersize collecting hopper, 104, a first collecting pipe, 105, a collecting tank, 106, a water inlet pump, 107, a first-level buffer water tank, 108 and a second-level buffer water tank, 141. a second vibrator 142, a second vibrating screen 143, a second undersize collecting hopper 144, a second collecting pipe 220, a coagulation reaction chamber 221, a polyaluminium chloride (PAC) dosing pipe 222, a coagulation stirring paddle 223, a stirring motor 230, a flocculation reaction chamber 231, a Polyacrylamide (PAM) dosing pipe 232, a flocculation stirring paddle 240, a diversion chamber 250, a mud-water separation chamber 251, a return spring 252, a horizontal traction bar 253, an inclined plate 254, a horizontal fixing rod 255, an aeration pipe 256, a traction motor 257, a traction steel rope 258, a fixing pulley 259, a rotary mud scraper 2510, a mud scraper 2511 and a water collecting weir.

Detailed Description

In order to alleviate the colliery sump siltation in pit frequently, the utility model discloses with coal slime water treatment theory collect the back by traditional sump in pit and rise the well again and handle and change into the sump in pit before direct processing, can save the energy consumption cost that coal slime water rises the well and handle and avoid sump siltation in pit frequently, water pump pipeline equipment wearing and tearing scheduling problem. Simultaneously the utility model discloses with the vibration screening with the water conservancy divide principle phase coupling soon to combine the shallow pond of swash plate to deposit the technique, to the difference nature of particulate matter particle diameter in the coal slime aquatic, density and viscosity, improve pertinence and broad-spectrum nature of getting rid of different particle diameter particulate matters in the coal slime aquatic, through expanding the pit water advanced treatment process flow in the pit, form a colliery underground coal muddy water and handle multiplexing system.

The technical solution of the present invention is further specifically described below by way of specific embodiments and with reference to the accompanying drawings. It is to be understood that the practice of the present invention is not limited to the following examples, and that any modifications and/or changes in form made to the present invention are intended to fall within the scope of the present invention.

In the utility model, all parts and percentages are weight units, and the adopted equipment, raw materials and the like can be purchased from the market or commonly used in the field if not specified. The methods in the following examples are conventional in the art unless otherwise specified. The components or devices in the following examples are, unless otherwise specified, standard parts or parts known to those skilled in the art, the structure and principle of which are known to those skilled in the art through technical manuals or through routine experimentation.

Example 1:

the underground coal mine coal mud water treatment multiplexing system shown in figure 1 comprises a solid-liquid separation unit 1 for removing large-particle-size particles in coal slurry water in a vibration separation, cyclone separation and filtration mode, a pretreatment unit 2 for removing suspended particles, flocs and colloids in the coal slurry water in a precipitation, clarification and filtration mode, an ultrafiltration treatment unit 3 for removing the suspended particles, the flocs and the colloids in the coal slurry water in a self-cleaning filtration and ultrafiltration membrane filtration mode, and a reverse osmosis treatment unit 4 for reducing the content of soluble solids and ions in the coal slurry water in a security filtration and reverse osmosis membrane filtration mode; the solid-liquid separation unit 1, the pretreatment unit 2, the ultrafiltration unit 3 and the reverse osmosis unit 4 are connected in sequence through pipelines.

A method for carrying out underground coal mine muddy water treatment and reuse by adopting the underground coal mine muddy water treatment and reuse system specifically comprises the following steps:

s1, enabling underground coal mine muddy water to enter a solid-liquid separation unit 1, and removing particles with large particle sizes of more than 3.0mm in the coal mine muddy water, wherein the step is used for reducing the sedimentation frequency of an underground water sump and the load of a subsequent treatment unit;

s2, the coal slime water in the step S1 enters a pretreatment unit 2, the pretreatment unit 2 comprises a pre-settling tank 21, a high-efficiency clarification tank 22, a mutual washing filter 23 and a coagulant dosing device 24, the pre-settling tank 21, the high-efficiency clarification tank 22 and the mutual washing filter 23 are sequentially connected through a pipeline, the coagulant dosing device 24 is connected with the high-efficiency clarification tank 22, so that the coal slime water sequentially flows through the pre-settling tank 21, the high-efficiency clarification tank 22 and the mutual washing filter 23, adding 50-100 mg/L polyaluminium chloride (PAC) and 0.5-1.0 mg/L Polyacrylamide (PAM) into the high-efficiency clarification tank 22 through a coagulant adding device 24 to ensure that suspended matters in the treated coal slime water are less than 20mg/L, the steps further remove suspended particles, flocs and part of colloids in the coal slime water through gravity pre-settling, clarification and filtering respectively so as to meet the water inlet requirements of the subsequent steps;

s3, enabling the coal slime water in the step S2 to enter an ultrafiltration treatment unit 3, wherein the ultrafiltration treatment unit 3 comprises a self-cleaning filter 31, an ultrafiltration device 32 and an oxidation and reduction agent adding device 33 which are sequentially connected through a pipeline, enabling the coal slime water to sequentially flow through the self-cleaning filter 31 and the ultrafiltration device 32, adding a sodium hypochlorite oxidizing agent and a sodium bisulfite reducing agent to the front part of the self-cleaning filter 31 through the oxidation and reduction agent adding device 33, and deeply removing suspended matters, flocs and colloids in the water through self-cleaning filtration and ultrafiltration action respectively;

s4, the coal slime water in the step S3 enters a reverse osmosis treatment unit 4, the reverse osmosis treatment unit 4 comprises a security filter 41, a reverse osmosis device 42 and a scale inhibitor feeding device 43 which are sequentially connected through pipelines, the coal slime water flows through the security filter 41 and the reverse osmosis device 42 in sequence, the water outlet is reused, the soluble solid and the ion content in the mine water are further removed through security filtration and reverse osmosis respectively, and the water outlet reuse quality of the whole system is improved.

Example 2:

As shown in fig. 2, the solid-liquid separation unit 1 includes a vibrating screen solid-liquid separation device 11, a high-precision cyclone separator 12, an ultra-precision cyclone separator 13, an ultra-precision filter screen device 14, a coal slurry conveying belt 15, a collection tank 105, a water inlet pump 106, a primary buffer water tank 107, and a secondary buffer water tank 108.

The vibrating screen solid-liquid separation device 11 and the ultra-precision filter screen device 14 are both provided with a solid outlet and a liquid outlet, the solid outlet of the vibrating screen solid-liquid separation device 11 and the solid outlet of the ultra-precision filter screen device 14 are both connected with a coal slurry conveying belt 15, the liquid outlet of the vibrating screen solid-liquid separation device 11 is sequentially connected with a collecting tank 105 and a high-precision cyclone separator 12, and the liquid outlet of the ultra-precision filter screen device 14 is sequentially connected with a primary buffer water tank 107 and an ultra-precision cyclone separator 13.

The high-precision cyclone separator 12 and the ultra-precision cyclone separator 13 are both provided with a top overflow port and a bottom discharge port, the top overflow port of the high-precision cyclone separator 12 and the top overflow port of the ultra-precision cyclone separator 13 are both connected with a secondary buffer water tank 108, and the bottom discharge port of the high-precision cyclone separator 12 and the bottom discharge port of the ultra-precision cyclone separator 13 are both connected with an ultra-precision filter sieve device 14.

The solid-liquid separation device 11 of the vibrating screen is sequentially provided with a first vibrator 101, a first vibrating screen 102, a first undersize collecting hopper 103 and a first collecting pipe 104 from top to bottom, the first vibrating screen 102 is arranged at an inclined angle, the outlet end of the first vibrating screen 102 is positioned above the coal slime conveying belt 15, and the first collecting pipe 104 is connected with a collecting tank 105.

The ultra-precision filter sieve device 14 is sequentially provided with a second vibrator 141, a second vibrating screen 142, a second undersize collecting hopper 143 and a second collecting pipe 144 from top to bottom, the second vibrating screen 142 is arranged at an inclined angle, the outlet end of the second vibrating screen 142 is positioned above the coal slime conveying belt 15, and the second collecting pipe 144 is connected with the primary buffer water tank 107.

The first vibrating screen 102 has a vibration frequency of 20 to 30Hz, a screen hole diameter of 3.0 to 5.0mm, a double amplitude of 2.0 to 3.0mm, and a screen surface inclination of 5 to 8 degrees. In this embodiment, the first vibrating screen 102 has a vibration frequency of 24Hz, a screen hole diameter of 3.0mm, a double amplitude of 2.0mm, and a screen surface inclination of 6 °.

The second vibrating screen 142 has a vibration frequency of 30 to 35Hz, a screen mesh size of 0.5 to 1.0mm, a double amplitude of 3.0 to 5.0mm, and a screen surface inclination of 7 to 9 degrees. In this embodiment, the second vibrating screen 142 has a vibration frequency of 30Hz, a screen hole diameter of 1.0mm, a double amplitude of 3.0mm, and a screen surface inclination of 8 °.

The separation precision of the high-precision cyclone separator 12 is 1.0-2.0 mm, and the separation precision of the ultra-precision cyclone separator 13 is 0.5-1.0 mm. The cyclone separator adopts two parallel operation modes with different precisions.

The pretreatment unit 2 comprises a pre-settling tank 21, a high-efficiency settling tank 22, a mutual washing filter 23 and a coagulant dosing device 24, wherein the pre-settling tank 21, the high-efficiency settling tank 22 and the mutual washing filter 23 are sequentially connected through a pipeline, the coagulant dosing device 24 is connected with the high-efficiency settling tank 22, the bottom of the pre-settling tank 21 is connected with a coal slime tank 25, and the bottom of the high-efficiency settling tank 22 is connected with a homogenizing tank 26.

A horizontal sedimentation tank and a water suction tank are sequentially arranged in the pre-sedimentation tank 21. The bottom of the horizontal sedimentation tank is provided with a square conical hopper for discharging the small coal slime particles separated by gravity sedimentation in time. An aeration device is arranged at the bottom of the water suction pool, and the coal slime deposition of the water suction pool is prevented through the aeration at the bottom of the pool.

As shown in fig. 3, the high-efficiency clarification tank 22 is provided with a coagulation reaction chamber 220, a flocculation reaction chamber 230, a diversion chamber 240 and a mud-water separation chamber 250 in sequence.

A coagulation stirring paddle 222 is arranged in the coagulation reaction chamber 220, the top of the coagulation stirring paddle 222 is connected with a stirring motor 223 extending out of the top of the high-efficiency clarification tank 22, and the top of the coagulation reaction chamber 220 is connected with a polyaluminium chloride (PAC) dosing pipe 221.

A flocculation stirring paddle 232 is arranged in the flocculation reaction chamber 230, the top of the flocculation stirring paddle 232 is connected with a stirring motor 223 extending out of the top of the high-efficiency clarification tank 22, and the top of the flocculation reaction chamber 230 is connected with a Polyacrylamide (PAM) dosing pipe 231.

The upper part in the mud-water separation chamber 250 is provided with an aerator pipe 255 and a plurality of sloping plates 253, the inside of the mud-water separation chamber 250 is provided with a rotary mud scraper 259, the top of the rotary mud scraper 259 is connected with a stirring motor 223 extending out of the top of the high-efficiency clarification tank 22, the bottom of the rotary mud scraper 259 is provided with a mud scraper 2510, the top of the high-efficiency clarification tank 22 is provided with a traction motor 256, and the upper part in the mud-water separation chamber 250 is also provided with a water collecting weir 2511.

The top of the sloping plate 253 is provided with a horizontal traction rod 252 movably connected with the sloping plate 253, one end of the horizontal traction rod 252 is elastically connected with the wall of the high-efficiency clarification tank 22 through a return spring 251, and the other end of the horizontal traction rod 252 is connected with a traction motor 256 through a traction steel wire 257 on a fixed pulley 258.

The bottom of the inclined plate 253 is provided with a horizontal fixed rod 254 movably connected with the inclined plate 253, the horizontal fixed rod 254 is fixedly connected with the wall of the high-efficiency clarification tank 22, and the aeration pipe 255 is arranged below the horizontal fixed rod 254.

The plurality of inclined plates 253 are uniformly distributed in parallel, the horizontal inclination angle of each inclined plate 253 ranges from 45 degrees to 65 degrees, the reversible angle range of each inclined plate 253 ranges from 50 degrees to 90 degrees, and the arrangement distance of the inclined plates 253 ranges from 10 cm to 20 cm. In this embodiment, the inclination angle of the inclined plate 253 is 60 °, the turnover angle is 60 °, and the installation distance of the inclined plate 253 is 15 cm.

Aeration pipe 255 is equipped with a plurality of aeration holes that are the annular equipartition, and aeration hole's aperture is 5~10mm, and aeration hole's the interval of arranging is 10~20 cm. In the embodiment, the aeration holes are symmetrically arranged on the aeration pipe in an annular shape at equal intervals, the aperture is 8mm, and the hole interval is 15 cm.

The mutual washing filter 23 operates in parallel filtration and gas-water back washing mode. All filters filter simultaneously under the filtering working condition; when the backwashing work condition is carried out, the backwashing water of one filter is provided by the filtered water produced by the other filters, and a backwashing water tank is not required to be additionally arranged for providing the backwashing water.

The ultrafiltration processing unit 3 comprises a self-cleaning filter 31, an ultrafiltration device 32 and an oxidation-reduction agent feeding device 33 which are sequentially connected through pipelines. The self-cleaning filter 31 is mainly used for further reducing the water inlet impurities of the ultrafiltration device 32, and realizes automatic cleaning by adopting a pressure difference control mode.

The reverse osmosis treatment unit 4 comprises a cartridge filter 41, a reverse osmosis device 42 and a scale inhibitor feeding device 43 which are connected in sequence through pipelines.

In the step S1, the specific steps of removing the particulate matters with large particle size of more than 3.0mm in the coal slurry water are as follows:

s11, pumping underground coal mine slurry into a vibrating screen solid-liquid separation device 11, so that large-particle-size oversize particles and impurities obtained after the coal slurry is screened by a first vibrating screen 102 fall into a coal slurry conveying belt 15 along with vibration to be conveyed away, the undersize particles and the impurities flow into a first undersize collecting hopper 103 along with the coal slurry, and the undersize particles and the impurities flow into a collecting tank 105 through a first collecting pipe 104;

s12, pumping the slime water in the collecting tank 105 in the step S11 into a high-precision cyclone separator 12, enabling the slime water to enter the high-precision cyclone separator 12 in a tangential mode under the operation pressure of 0.2-0.3 MPa and the feeding flow rate of 8.0-12.0 m/S, enabling the slime water to enter an ultra-precision filter screen device 14 through the bottom flow of the slime water after cyclone separation and concentration, and enabling the slime water to overflow into a secondary buffer water tank 108;

s13, performing vibration filtration on the coal slime underflow on a second vibration screen 142, wherein particles on the small-particle-size screen with the particle size of more than 1.0mm fall into the coal slime conveying belt 15 along with vibration and are conveyed away, and undersize products and impurities with the fine particle size of less than 1.0mm flow into a second undersize product collecting hopper 143 and then flow into a first-stage buffer water tank 107 through a second collecting pipe 144;

s14, pumping the coal slime water in the primary buffer water tank 107 in the step S13 into the ultra-precision cyclone separator 13, enabling the coal slime water to enter the ultra-precision cyclone separator 13 in a tangential mode under the operation pressure of 0.2-0.3 MPa and the feeding flow rate of 8.0-12.0 m/S, enabling the coal slime water to enter the ultra-precision filter screen device 14 through cyclone separation and concentration, repeating the step S13, and enabling the coal slime water to overflow to enter the secondary buffer water tank 108; the step aims to further concentrate the coal slime, improve the screening efficiency and remove more than 80% of particulate matters.

In the step S2, the deposited coal slurry on the inclined plate 253 of the high-efficiency clarifier 22 is removed by mechanical inversion and aeration disturbance. Under the traction of a traction motor 256, the inclined plate 253 drives the horizontal traction rod 252 to horizontally move through a traction steel wire 257, so that the inclined plate 253 integrally rotates around a fulcrum on the bottom horizontal fixing rod 254, and meanwhile, a return spring 251 on the other end of the horizontal traction rod 252 is stretched; on the contrary, after the traction motor 256 cancels the traction of the traction steel wire 257, the inclined plate 253 is forced to rotate reversely around the fulcrum on the bottom horizontal fixing rod 254 by the horizontal traction rod 252 under the reverse traction of the return spring 251 to reset, and a turnover dredging work period of the inclined plate is completed. Meanwhile, bubbles generated by the aeration pipe 255 can collide with the disturbance inclined plate 253 to attach coal slime, so that the silt removing effect is enhanced.

Based on the method for treating and reusing coal slurry under the coal mine, the effluent quality of each treatment unit is listed in table 1. The water discharged from each processing unit of the system can be reused in the reuse ways and directions of underground dust prevention and sprinkling, equipment cooling, emulsion preparation and the like according to the quality of water, the underground reuse rate of the mine water is improved, and the well-lifting discharge amount of the mine water and coal slime is reduced.

TABLE 1 quality of discharged water of each processing unit of coal slime water processing and reusing system

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the claims.

Claims

1. The utility model provides a colliery is reuse system of muddy water treatment in pit which characterized in that: the underground coal mine coal mud water treatment multiplexing system comprises a solid-liquid separation unit (1) for removing large-particle-size particles in coal slime water in a vibration separation, cyclone separation and filtering mode, a pretreatment unit (2) for removing suspended particles, flocs and colloids in the coal slime water in a precipitation, clarification and filtering mode, an ultrafiltration treatment unit (3) for removing the suspended particles, the flocs and the colloids in the coal slime water in a self-cleaning filtering and ultrafiltration membrane filtering mode, and a reverse osmosis treatment unit (4) for reducing the content of soluble solids and ions in the coal slime water in a security filtering and reverse osmosis membrane filtering mode; the solid-liquid separation unit (1), the pretreatment unit (2), the ultrafiltration treatment unit (3) and the reverse osmosis treatment unit (4) are sequentially connected through pipelines.

2. The underground coal mine muddy water treatment and reuse system according to claim 1, characterized in that: the solid-liquid separation unit (1) comprises a vibrating screen solid-liquid separation device (11), a high-precision cyclone separator (12), an ultra-precision cyclone separator (13), an ultra-precision filter screen device (14), a coal slime conveying belt (15), a collecting tank (105), a water inlet pump (106), a primary buffer water tank (107) and a secondary buffer water tank (108); the vibrating screen solid-liquid separation device (11) and the ultra-precision filter screen device (14) are respectively provided with a solid outlet and a liquid outlet, the solid outlet of the vibrating screen solid-liquid separation device (11) and the solid outlet of the ultra-precision filter screen device (14) are respectively connected with a coal slurry conveying belt (15), the liquid outlet of the vibrating screen solid-liquid separation device (11) is sequentially connected with a collecting tank (105) and a high-precision cyclone separator (12), and the liquid outlet of the ultra-precision filter screen device (14) is sequentially connected with a primary buffer water tank (107) and an ultra-precision cyclone separator (13); high accuracy hydrocyclone separator (12) and super precision hydrocyclone separator (13) all are equipped with top overflow mouth and bottom discharge gate, and second grade surge tank (108) are all connected to the top overflow mouth of high accuracy hydrocyclone separator (12) and the top overflow mouth of super precision hydrocyclone separator (13), and super precision filter sieve device (14) is all connected to the bottom discharge gate of high accuracy hydrocyclone separator (12) and the bottom discharge gate of super precision hydrocyclone separator (13).

3. The underground coal mine muddy water treatment and reuse system according to claim 2, characterized in that: the solid-liquid separation device (11) of the vibrating screen is sequentially provided with a first vibrator (101), a first vibrating screen (102), a first undersize collecting hopper (103) and a first collecting pipe (104) from top to bottom, the first vibrating screen (102) is arranged in an inclined angle, the outlet end of the first vibrating screen (102) is positioned above a coal slime conveying belt (15), and the first collecting pipe (104) is connected with a collecting tank (105); the ultra-precision filter screen device (14) is provided with a second vibrator (141), a second vibrating screen (142), a second undersize collecting hopper (143) and a second collecting pipe (144) from top to bottom in sequence, the second vibrating screen (142) is arranged at an inclined angle, the outlet end of the second vibrating screen (142) is positioned above the coal slime conveying belt (15), and the second collecting pipe (144) is connected with a first-level buffer water tank (107).

4. The underground coal mine muddy water treatment and reuse system according to claim 3, characterized in that: the vibration frequency of the first vibration screen (102) is 20-30 Hz, the diameter of a screen hole is 3.0-5.0 mm, the double amplitude is 2.0-3.0 mm, and the inclination angle of a screen surface is 5-8 degrees; the second vibrating screen (142) has a vibration frequency of 30-35 Hz, a screen hole size of 0.5-1.0 mm, a double amplitude of 3.0-5.0 mm and a screen surface inclination angle of 7-9 degrees.

5. The underground coal mine muddy water treatment and reuse system according to claim 1, characterized in that: the pretreatment unit (2) comprises a pre-settling tank (21), a high-efficiency clarification tank (22), a mutual flushing filter (23) and a coagulant dosing device (24), wherein the pre-settling tank (21), the high-efficiency clarification tank (22) and the mutual flushing filter (23) are sequentially connected through a pipeline, and the coagulant dosing device (24) is connected with the high-efficiency clarification tank (22).

6. The underground coal mine muddy water treatment and reuse system according to claim 5, characterized in that: the inner upper part of the high-efficiency clarification tank (22) is provided with an aerator pipe (255) and a plurality of inclined plates (253), the inner lower part of the high-efficiency clarification tank (22) is provided with a rotary mud scraper (259), and the top of the high-efficiency clarification tank (22) is provided with a traction motor (256); the top of the sloping plate (253) is provided with a horizontal draw bar (252) movably connected with the sloping plate (253), one end of the horizontal draw bar (252) is elastically connected with the tank wall of the high-efficiency clarification tank (22), and the other end of the horizontal draw bar (252) is connected with a traction motor (256); the bottom of the inclined plate (253) is provided with a horizontal fixing rod (254) movably connected with the inclined plate (253), the horizontal fixing rod (254) is fixedly connected with the wall of the high-efficiency clarification tank (22), and the aerator pipe (255) is arranged below the horizontal fixing rod (254).

7. The underground coal mine muddy water treatment and reuse system according to claim 6, characterized in that: the inclined plates (253) are uniformly distributed in parallel, the horizontal inclination angle of each inclined plate (253) is 45-65 degrees, the reversible angle range of each inclined plate (253) is 50-90 degrees, and the arrangement distance of the inclined plates (253) is 10-20 cm; aeration pipe (255) are equipped with a plurality of aeration holes that are the annular equipartition, and the aperture of aeration hole is 5~10mm, and the interval of arranging of aeration hole is 10~20 cm.

8. The underground coal mine muddy water treatment and reuse system according to claim 1, characterized in that: the ultrafiltration treatment unit (3) comprises a self-cleaning filter (31), an ultrafiltration device (32) and an oxidation-reduction agent feeding device (33) which are sequentially connected through pipelines, and the reverse osmosis treatment unit (4) comprises a security filter (41), a reverse osmosis device (42) and a scale inhibitor feeding device (43) which are sequentially connected through pipelines.