CN110950461A

CN110950461A - System and method for treating high-concentration suspended matter mine sewage

Info

Publication number: CN110950461A
Application number: CN201911320970.9A
Authority: CN
Inventors: 赵维国; 袁景; 孙久政; 付秀峰
Original assignee: Heilongjiang Longmei Shuangyashan Mining Co Ltd; Liaoning Technical University
Current assignee: Heilongjiang Longmei Shuangyashan Mining Co Ltd; Liaoning Technical University
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-04-03
Anticipated expiration: 2039-12-19
Also published as: CN110950461B

Abstract

The invention discloses a system and a method for treating high-concentration suspended matter mine sewage, wherein the system for treating the sewage comprises a plurality of water reservoirs and independently arranged purification devices; the reservoir is built in each well and production area of a mine and is used for collecting waste water generated in underground work; a sediment discharge bin is arranged at the bottom of the reservoir, and after the sewage entering the reservoir is subjected to primary sedimentation, most of large-particle suspended matters are precipitated into the sediment discharge bin and then discharged; and pumping the precipitated wastewater in the reservoir into a purification device through a water pump for purification. The system is simple, the purification device is designed in a three-dimensional mode, the size is small, the underground installation space can be adapted, sewage purification treatment can be directly carried out underground, and the requirements of underground working condition environments are met. The sewage treatment method is simple, can be automatically controlled, and has high efficiency and low operation cost; the purified water can be directly reused under the mine, so that economic and environmental benefits are achieved, and the application value is good.

Description

System and method for treating high-concentration suspended matter mine sewage

Technical Field

The invention relates to a system and a method for treating high-concentration suspended matter mine sewage.

Background

A large amount of mine wastewater generated by coal mining is directly discharged without any treatment, and causes pollution to water bodies such as underground water, surface water and the like around a mining area. The recycling of the mine wastewater can solve the problems of water shortage of coal mines and pollution of mine water to ecological environment, and can also enable coal enterprises to obtain good economic, social and environmental benefits.

At present, the mine wastewater treatment technology in China mainly lifts mine water in a underground water sump to the ground through a high-power lifting pump, and a regulating tank and related wastewater treatment facilities are arranged on the ground, so that wastewater treatment is carried out. The part of the wastewater with the water quality up to the standard is used on the ground, and the rest of the wastewater is conveyed to the underground for recycling, so that the problem of mine sewage pollution environment is solved, the utilization rate of water resources is improved, and the concept of environmental protection is met. However, the mine is generally deep, the depth of the mine is mostly hundreds to thousands of meters, the energy consumption for lifting the waste water from the bottom of the well to the ground for treatment is huge, and the energy is greatly wasted. The traditional wastewater treatment equipment needs to consume a large amount of capital for construction, occupies a large area and causes waste of land resources, and meanwhile, the traditional wastewater treatment equipment has quite large operation consumption and is difficult to obtain economic benefits.

Therefore, if the mine wastewater is directly treated and recycled underground, the treatment cost of the mine wastewater can be greatly reduced. From the long-term development of coal enterprises, mine water is treated underground for direct recycling, and the method has great significance for the sustainable development of mining areas and the national coal energy industry. However, at present, no well-developed process and equipment exist for meeting the requirements of water treatment under the mine well. This is mainly because the operation conditions under the mine are not as convenient as the operation on the ground, and are limited by the space of the laneway under the mine, and the water treatment equipment commonly used on the ground is not suitable for being built in the mine due to the huge floor space. Meanwhile, the underground sewage treatment needs to consider the influences of factors such as safety and explosion-proof requirements and equipment control. Therefore, a system and a method which can be directly applied to underground mine sewage treatment are needed.

Disclosure of Invention

Aiming at the existing problems, the invention provides a system and a method for treating high-concentration suspended matter mine sewage. The specific technical scheme is as follows:

firstly, the invention provides a treatment system for mine sewage with high-concentration suspended matters, which comprises a plurality of water reservoirs and independently arranged purification devices; the reservoir is built in each well and production area of a mine and is used for collecting waste water generated in underground work; a sediment discharge bin is arranged at the bottom of the reservoir, and after the sewage entering the reservoir is subjected to primary sedimentation, most of large-particle suspended matters are precipitated into the sediment discharge bin and then discharged; pumping the precipitated wastewater in the reservoir into a purification device through a water pump for purification; the purification device comprises a multi-stage purification bin and a filtered object storage bin which are designed from top to bottom; the filtered matter storage tank and the multi-stage purification bin are designed in parallel; multistage purification storehouse upper portion is equipped with sewage inlet, the bottom is equipped with the clean water export, and its every bin all communicates with filtering thing bin, and all is equipped with filter equipment and filtering thing eduction gear in every bin to in discharging into filtering thing storage tank with filtering the thing.

According to the treatment system for the high-concentration suspended matter mine sewage, the hydraulic opening and closing solid-liquid separation door is arranged between the reservoir and the sediment discharge bin, the liquid level sensor is arranged on the upper portion in the reservoir, and when the height of the waste water collected in the reservoir reaches the liquid level sensor, the hydraulic opening and closing solid-liquid separation door is automatically closed and the sediment is discharged.

Preferably, the bottom of the sediment discharge bin is provided with a spiral sewage discharge device and a filter pressing water outlet, and the sediment is discharged through the spiral sewage discharge device after being solidified and is conveyed out through a belt conveyor for further treatment.

In the treatment system for the mine sewage with the high-concentration suspended matters, the purification device is of a closed columnar three-dimensional structure, the multi-stage purification bin is a three-stage purification bin, and a stirring device penetrating through the middle part is further arranged in the multi-stage purification bin; the multistage purification bin is communicated with the filtered object storage bin through a suspended matter outlet; the filtering device is arranged between each stage of purification bin; the stirring device comprises a stirring shaft, and the filtering material discharging device is sleeved on the stirring shaft.

Preferably, the filter device is a ceramic mesh; the filter discharge device is a scraper plate which is vertically arranged, one end of the scraper plate is connected to the stirring shaft, the other end of the scraper plate extends to the side wall of the multistage purification bin, and the bottom end of the scraper plate is attached to the upper surface of the filter device so as to scrape the filter. The filter discharge devices in the same-stage purification chamber are not less than 3 pieces and are uniformly distributed.

In the treatment system for the mine sewage with the high-concentration suspended matters, the stirring device further comprises a plurality of stirring blades arranged on the stirring shaft, the stirring blades are hollow stirring rods, a sewage purifying agent is filled in cavities of the stirring rods, and a sewage purifying agent outlet is formed in the lower portion of each stirring rod.

Preferably, the filter storage tank is provided with a curing agent inlet at the upper part and a cured product propelling device for discharging cured precipitates at the lower part.

Secondly, the invention also provides a method for treating the high-concentration suspended matter mine sewage, which adopts the sewage treatment system to treat the sewage and specifically comprises the following steps:

1) collecting waste water: collecting waste water generated in mine work into water reservoirs of each well and work area;

2) primary purification: adding a precipitator into the reservoir for preliminary purification, precipitating most of large-particle suspended matters contained in the wastewater into a precipitate discharge bin at the bottom of the reservoir, discharging the large-particle suspended matters through a spiral sewage discharge device at the bottom of the precipitate discharge bin, and outputting the large-particle suspended matters through a belt conveyor for further treatment;

3) multi-stage purification: pumping the wastewater primarily purified in the step) out of the upper part by using a water pump, enabling the wastewater to enter a purifying device through a sewage inlet at the upper part of the multi-stage purifying bin, starting a stirring device to accelerate purification, scraping suspended matters filtered by a filtering device by using a scraper, and enabling the suspended matters to enter a filtered matter storage tank from a suspended matter outlet; adding a curing agent from a curing agent inlet at the upper part of the filtered object storage tank, and discharging the solidified suspended matters after the suspended matters are cured by a cured object propelling device at the bottom of the storage tank; the clean water purified by the multi-stage purification bin is discharged from a clean water outlet at the bottom;

4) reuse of purified water: the purified water after the multi-stage purification in the step) is directly conveyed to a mine working area for reuse or conveyed to the ground for further disinfection and comprehensive utilization.

The invention has the beneficial effects that:

compared with the traditional sewage purification system and method, the system is simple, the purification device is designed in a three-dimensional way, the volume is small, and the system can be disassembled and transported to be convenient to install; the purification device has compact and reasonable structure, can adapt to the underground installation space, and realizes the direct underground sewage purification treatment; meanwhile, the purification device is of a sealed columnar structure, is safe to use and meets the requirements of underground working condition environments. In addition, the sewage purification method is simple, can realize automatic control, and has high sewage purification efficiency and low system operation cost; the purified clean water can be directly reused under the mine, so that the conveying cost is saved, economic and environmental benefits are achieved, and the application value is good.

Drawings

FIG. 1 is a schematic diagram of the construction of a system for treating high suspension mine wastewater in accordance with the present invention;

FIG. 2 is a schematic longitudinal sectional view of the purification apparatus system of the present invention;

FIG. 3 is a cross-sectional structural diagram of the purification device system of the present invention.

In the figure: 1. a reservoir; 2. a purification device; 3. discharging the precipitate out of the bin; 4. a water pump; 5. a multi-stage purification bin; 6. a filtrate storage tank; 7. a sewage inlet; 8. a clean water outlet; 9. a filtration device; 10. a filtrate discharge means; 11. the solid-liquid separation door is opened and closed hydraulically; 12. a liquid level sensor; 13. a filter press with a spiral sewage draining device; 14. filter pressing the water outlet; 15. a stirring device; 150. a stirring shaft; 151. stirring blades; 1511. a sewage purifying agent outlet; 16. a suspended matter outlet; 17. a curing agent inlet; 18. a cured product advancing device; 19. a belt conveyor.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the following embodiments and accompanying drawings:

the embodiment relates to a system and a method for treating high-concentration suspended matter mine sewage. The sewage treatment system comprises a plurality of water reservoirs 1 and purification devices 2 which are independently arranged; as shown in fig. 1, the reservoir 1 is built in each well and production area of a mine and is used for collecting waste water generated in the underground work; a sediment discharge bin 3 is arranged at the bottom of the water storage tank 1, and after the sewage entering the water storage tank 1 is subjected to primary sedimentation, most of large-particle suspended matters are precipitated into the sediment discharge bin 3 and then discharged; the precipitated waste water is pumped into a purification device 2 by a water pump 4 for further purification. As shown in fig. 2, the purifying device 2 comprises a multi-stage purifying bin 5 and a filtered substance storage bin 6 which are designed in a three-dimensional manner from top to bottom; the filter storage box 6 and the multistage purification bins 5 are designed side by side, so that the structure is exquisite and compact, the disassembly and the carrying are convenient, the installation environment under a mine is adapted, and the sewage treatment is directly realized. In this embodiment 5 upper portion in multistage purification storehouse is equipped with sewage inlet 7, the bottom is equipped with clean water outlet 8, and its every bin all communicates with filtration thing bin 6, and all is equipped with filter equipment 9 and filtration thing eduction gear 10 in every bin to in filtering thing discharge to filter in the thing bin 6.

The embodiment the processing system of high concentration suspended solid mine sewage, be equipped with hydraulic pressure solid-liquid separation door 11 that opens and shuts between its cistern 1 and the sediment discharge bin 3, upper portion is equipped with level sensor 12 in the cistern 1, and when the waste water height of collecting in the cistern 1 to level sensor 12, hydraulic pressure solid-liquid separation door 11 self-closing that opens and shuts, the bottom in sediment discharge bin 3 is equipped with spiral waste fitting discharging 13 and filter pressing water outlet 14. The sediment in the bin is discharged after being subjected to filter pressing and curing by a spiral sewage discharging device 13, and then is conveyed out for additional treatment by a belt conveyor 19; and the wastewater entering the bin and the wastewater generated by filter pressing are discharged from the filter pressing water outlet 14 and then returned to the reservoir 1 or directly enter the purification device 2 for purification. The process can realize automatic operation, does not need manual guard, saves cost and saves worry and labor.

In addition, in the system for treating high-concentration suspended matter mine sewage, the purification device 2 is of a sealed columnar three-dimensional structure, the multi-stage purification bin 5 is a three-stage purification bin, and a stirring device 15 penetrating through the middle part is further arranged in the multi-stage purification bin 5; the multistage purification bin 5 is communicated with the filtered object storage tank 6 through a suspended object outlet 16; the filtering device 9 is arranged between each stage of purification bin; the stirring device 15 comprises a stirring shaft 150, and the filtrate discharging device 10 is sleeved on the stirring shaft 150. The filtering device 9 preferably uses a ceramic mesh; after entering the purification device 2 from the sewage inlet 7 at the upper part, the sewage is filtered and purified by the filtering device 9 of the multi-stage purification bin 5 and then discharged from the clean water outlet 8 at the lower part.

In this embodiment, the filtrate discharging device 10 is a vertically arranged scraper, one end of which is connected to the stirring shaft 150, the other end of which extends to the side wall of the multistage purification bin 5, and the bottom end of which is attached to the upper surface of the filtering device 9, so that the filtrate deposited in the suspended matter can be scraped off and enter the filtrate storage bin 6 from the suspended matter outlet 16. The filtering material discharging devices 10 in the same-stage purifying chamber are not less than 3 pieces and are uniformly distributed, as shown in fig. 3, so as to separate the sewage inlet 7 from the suspended matter outlet 16 and prevent pumped waste water from directly entering the filtering material storage tank 6 from the suspended matter outlet 16. The upper part of the filtered material storage tank 6 is provided with a curing agent inlet 17, and the lower part is provided with a cured material propelling device 18 for discharging cured sediment. The curing agent enters the filtrate storage tank 6 from the curing agent inlet 17 to cure the filtrate, and then the cured product is discharged by the cured product pusher 18 for separate disposal. In this embodiment, the spiral sewage draining device 13 and the condensate propelling device 18 may be any conventional sludge treatment filter press.

In order to improve the purification effect, in the system for treating mine sewage with high suspended solids according to the embodiment, the stirring device 15 further includes a plurality of stirring blades 151 disposed on the stirring shaft 150, the stirring blades 151 are hollow stirring rods, a sewage purifying agent is filled in cavities of the stirring rods, a sewage purifying agent outlet 1511 is disposed at a lower portion of the stirring rods, and the purifying efficiency is accelerated by stirring and adding the purifying agent in the purification process.

The method for treating the mine sewage with high-concentration suspended matters by using the sewage purification device comprises the following steps:

1) collecting waste water: collecting waste water generated in mine work into a reservoir 1 of each well and work area;

2) primary purification: adding a precipitator into the water storage tank 1 for preliminary purification, precipitating most of large-particle suspended matters contained in the wastewater into a precipitate discharge bin 3 at the bottom of the water storage tank 1, discharging the large-particle suspended matters through a spiral sewage discharge device 13 at the bottom of the precipitate discharge bin 3, and outputting the large-particle suspended matters through a belt conveyor 14 for further treatment;

3) multi-stage purification: pumping the wastewater primarily purified in the step 2 out of the upper part by using a water pump 4, enabling the wastewater to enter the purifying device 2 through a sewage inlet 7 at the upper part of the multi-stage purifying bin 5, starting a stirring device 15 to accelerate purification, scraping suspended matters filtered by the filtering device 9 by using a scraper, and enabling the suspended matters to enter a filtered matter storage tank 6 from a suspended matter outlet 16; adding a curing agent from a curing agent inlet 17 at the upper part of the filtered object storage tank 6, and discharging the solidified suspended objects through a cured object propelling device 18 at the bottom of the storage tank after the suspended objects are cured; the clean water purified by the multi-stage purification bin 5 is discharged from a clean water outlet 8 at the bottom;

4) reuse of purified water: and 3, directly conveying the purified water subjected to multistage purification in the step 3 to a mine working area for reuse, or conveying the purified water to the ground for further disinfection and comprehensive utilization.

The system is very simple, and the whole system is only provided with a set of filtering and purifying device, a set of pipeline for pumping water and a set of solid-liquid separation and slag discharge device by building water storage; the engineering quantity is small, the system operation cost is low, the modular operation can be realized, and the underground construction operation is facilitated. In addition, the sewage treatment method is simple and has high purification efficiency; the purified clean water can be directly reused under the mine, so that the conveying cost is saved, economic and environmental benefits are achieved, and the application value is good.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. Furthermore, it should be understood that although the present specification describes embodiments, this does not include only one embodiment, and such description is for clarity only, and those skilled in the art should be able to make the specification as a whole, and the embodiments may be appropriately combined to form other embodiments understood by those skilled in the art.

Claims

1. A high concentration suspended solid mine sewage's processing system which characterized in that: comprises a plurality of water reservoirs (1) and purification devices (2) which are independently arranged; the reservoir (1) is built in each well and production area of a mine and is used for collecting waste water generated in underground work; a sediment discharge bin (3) is arranged at the bottom of the water storage tank (1), and after the sewage entering the water storage tank (1) is subjected to primary sedimentation, most of large suspended matters are discharged after being precipitated into the sediment discharge bin (3); pumping the precipitated wastewater in the reservoir (1) into a purification device (2) through a water pump (4) for purification; the purification device (2) comprises a multi-stage purification bin (5) and a filtered object storage box (6) which are designed from top to bottom; the filtered matter storage tank (6) and the multi-stage purification bin (5) are designed in parallel; multistage purification storehouse (5) upper portion is equipped with sewage entry (7), the bottom is equipped with clean water outlet (8), and its every bin all with cross filter thing bin (6) intercommunication, and all be equipped with filter equipment (9) and cross filter thing eduction gear (10) in every bin to in will crossing filter thing and discharge into filter thing bin (6).

2. The system for treating mine wastewater with high suspended solids of claim 1, wherein: the automatic opening and closing device is characterized in that a hydraulic opening and closing solid-liquid separation door (11) is arranged between the reservoir (1) and the sediment discharge bin (3), a liquid level sensor (12) is arranged at the upper part in the reservoir (1), and when the height of the collected wastewater in the reservoir (1) reaches the liquid level sensor (12), the hydraulic opening and closing solid-liquid separation door (11) is automatically closed and the sediment is discharged.

3. The system for treating mine sewage with high suspension concentration according to claim 1 or 2, wherein: the bottom of the sediment discharge bin (3) is provided with a spiral sewage draining device (13) and a filter pressing water outlet (14); the precipitate is solidified and discharged through a spiral sewage discharge device (13) and is transported out for further treatment through a belt conveyor (19).

4. The system for treating mine wastewater with high suspended solids of claim 1, wherein: the purification device (2) is of a sealed columnar three-dimensional structure, the multistage purification bin (5) is a three-stage purification bin, and a stirring device (15) penetrating through the middle part is further arranged in the multistage purification bin (5); the multistage purification bin (5) is communicated with the filtered object storage tank (6) through a suspended matter outlet (16); the filtering device (9) is arranged between each stage of purification bin; the stirring device (15) comprises a stirring shaft (150), and the filtering material discharging device (10) is sleeved on the stirring shaft (150).

5. The system for treating mine sewage with high suspension concentration according to claim 1 or 4, wherein: the filtering device (9) is a ceramic mesh; the filter discharge device (10) is a scraper plate which is vertically arranged, one end of the scraper plate is connected to the stirring shaft (150), the other end of the scraper plate extends to the side wall of the multistage purification bin (5), and the bottom end of the scraper plate is attached to the upper surface of the filtering device (9) so as to scrape off the filter.

6. The system for treating mine wastewater with high suspended solids of claim 5, wherein: the filter discharge devices (10) in the same-stage purification chamber are not less than 3 pieces and are uniformly distributed.

7. The system for treating mine wastewater with high suspended solids of claim 4, wherein: the stirring device (15) further comprises a plurality of stirring blades (151) arranged on the stirring shaft (150), the stirring blades (151) are hollow stirring rods, a sewage purifying agent is filled in cavities of the stirring rods, and a sewage purifying agent outlet (1511) is formed in the lower portion of each stirring rod.

8. The system for treating mine wastewater with high suspended solids of claim 1, wherein: the upper part of the filtered object storage tank (6) is provided with a curing agent inlet (17), and the lower part is provided with a cured object propelling device (18) for discharging cured precipitates.

9. A method for treating high-concentration suspended matter mine sewage is characterized by comprising the following steps: the sewage treatment system of claims 1-8 is used for treatment, and specifically comprises the following steps:

1) collecting waste water: collecting waste water generated in mine work into a reservoir (1) of each well and work area;

2) primary purification: adding a precipitator into the reservoir (1) for preliminary purification, precipitating most of large-particle suspended matters contained in the wastewater into a precipitate discharge bin (3) at the bottom of the reservoir (1), discharging the large-particle suspended matters through a spiral sewage discharge device (13) at the bottom of the precipitate discharge bin (3), and outputting the large-particle suspended matters through a belt conveyor (14) for further treatment;

3) multi-stage purification: pumping the wastewater subjected to primary purification in the step 2) out of the upper part by using a water pump (4), enabling the wastewater to enter a purification device (2) through a sewage inlet (7) in the upper part of a multi-stage purification bin (5), starting a stirring device (15), accelerating purification, scraping suspended matters filtered by a filtering device (9) through a scraper, and enabling the suspended matters to enter a filtered matter storage tank (6) from a suspended matter outlet (16); adding a curing agent from a curing agent inlet (17) at the upper part of the filtered object storage tank (6), and discharging the solidified suspended matters through a cured object propelling device (18) at the bottom of the storage tank after the suspended matters are cured; the clean water purified by the multi-stage purification bin (5) is discharged from a clean water outlet (8) at the bottom;

4) reuse of purified water: and 3) directly conveying the purified water subjected to the multistage purification in the step 3) to a mine working area for reuse, or conveying the purified water to the ground for further disinfection and comprehensive utilization.