CN117800553A

CN117800553A - Intelligent purification system for coal mine sewage and control method thereof

Info

Publication number: CN117800553A
Application number: CN202410227146.3A
Authority: CN
Inventors: 张跃靓; 张凯元; 张凯斐
Original assignee: Shaanxi Shenmu Junyi Coal Industry Development Co ltd
Current assignee: Shaanxi Shenmu Junyi Coal Industry Development Co ltd
Priority date: 2024-02-29
Filing date: 2024-02-29
Publication date: 2024-04-02
Anticipated expiration: 2044-02-29
Also published as: CN117800553B

Abstract

The invention provides an intelligent purification system for coal mine sewage and a control method thereof, wherein the system comprises the following steps: the device comprises a particle separation group, a first water pump, an anaerobic tank, an aerobic tank, a suspended filler dispenser, a biological film tank, a sludge backflow pipe group, a disinfection tank, a second water pump, a second clear liquid tank and a control unit, wherein the anaerobic tank, the aerobic tank, the biological film tank and the disinfection tank are additionally arranged on the basis of the prior art to remove organic matters and inorganic matters from coal mine sewage, reduce the numerical values of COD, BOD and the like, and can monitor and control the aerobic tank, the anaerobic tank, the suspended filler dispenser, the sewage discharge condition and the like in real time through the arrangement of the control unit, so that the intelligent control is truly realized by using the control unit. The invention effectively solves the problem that the coal mine sewage treatment system in the prior art can not reduce the content of organic matters, inorganic matters and other substances in sewage, and simultaneously can solve the problem of low automation degree of the coal mine sewage treatment system.

Description

Intelligent purification system for coal mine sewage and control method thereof

Technical Field

The invention relates to the technical field of coal mine sewage treatment, in particular to an intelligent purification system for coal mine sewage and a control method thereof.

Background

In the related art, coal mine sewage is mostly purified by flocculating settling of particulate matters and suspended matters through flocculating agents and coagulant aids, so that relatively clear supernatant liquid is obtained; the application number is as follows: 202222881971.4 the utility model is named as a 'coal mine sewage treatment system', which mainly adopts multi-stage filtration of a plurality of gabion hypercalcite filter walls to filter out solid matters and large-particle-size floaters in coal mine sewage, and the final effect is equivalent to flocculation sedimentation, and only suspended matters and particles in the sewage can be filtered out, so that organic matters, inorganic matters, COD, BOD and the like in the sewage can not be reduced; and the system has low automation degree, and personnel monitoring is time-consuming and labor-consuming.

Disclosure of Invention

The utility model provides an intelligent purification system for coal mine sewage and a control method thereof, which are used for solving the problem that the content of organic matters, inorganic matters and other substances in the sewage cannot be reduced by a coal mine sewage treatment system in the prior art, and simultaneously solving the problem of low automation degree of the coal mine sewage treatment system.

In a first aspect, the utility model provides an intelligent purification system for coal mine sewage, comprising:

the adjusting tank is used for adjusting the initial water storage amount of the coal mine sewage and is provided with a sixth liquid level sensor;

The third water pump is communicated with the regulating tank;

a mixing tank communicated with the third water pump;

a third flowmeter disposed between the mixing tank and the third water pump;

the polyaluminum chloride solution adder is communicated with the mixing tank, and a first flowmeter, a third electromagnetic valve and a first flow control valve are arranged at the output end of the polyaluminum chloride solution adder;

the cyclone separating tank is communicated with the mixing tank, a filter screen is arranged in the inner cavity of the cyclone separating tank, the shape of the filter screen is the same as that of the inner cavity of the cyclone separating tank, the filter screen circumferentially extends along the inner wall of the cyclone separating tank to form a closed loop structure, a flocculation filter cavity is formed between the filter screen and the inner wall of the cyclone separating tank, a space surrounded by the filter screen is a clear water cavity, wherein a liquid inlet pipe of the cyclone separating tank is arranged along the tangential direction of the wall surface of the cyclone separating tank and is communicated with the flocculation filter cavity, and a liquid outlet pipe of the cyclone separating tank is arranged at the top end of the cyclone separating tank and is communicated with the clear water cavity; the deslagging pipe of the cyclone separation tank is arranged at the bottom end of the cyclone separation tank and is communicated with the flocculation filter cavity;

The polyacrylamide solution adder is arranged between the mixing tank and the cyclone separating tank, and a second flowmeter, a fourth electromagnetic valve and a second flow control valve are arranged at the output end of the polyacrylamide solution adder;

the first clear liquid pool is communicated with a liquid outlet pipe of the cyclone separating tank, a fifth electromagnetic valve is arranged between the first clear liquid pool and the cyclone separating tank, and a seventh liquid level sensor, a third turbidity sensor, a second pH value sensor, a second COD sensor, a second BOD sensor, a second stirrer and a second conductivity sensor are arranged in the first clear liquid pool;

the first water pump is communicated with the first clear liquid pool;

the anaerobic tank is communicated with the first water pump, and a first stirrer, a first liquid level sensor, a first submersible pump, a first turbidity sensor, a third COD sensor and an ammonia nitrogen sensor are arranged in the anaerobic tank;

the aerobic tank is communicated with the first submersible pump, a second liquid level sensor, a second submersible pump, a first dissolved oxygen sensor and a plurality of aerators are arranged in the aerobic tank, and a filler separation net is arranged in the aerobic tank to separate the aerobic tank into a filler cavity and a suction cavity; the second submersible pump is arranged in the suction cavity;

The suspension filler dispenser is arranged above the filler cavity;

the biological membrane pool is internally provided with a third liquid level sensor, an eighth liquid level sensor, a first sludge interface height sensor, a third submersible pump and a biological membrane group, wherein the biological membrane group divides an inner cavity of the biological membrane pool into a front cavity and a rear cavity, the front cavity is communicated with the second submersible pump, the third liquid level sensor is arranged in the front cavity, the third submersible pump is arranged in the rear cavity, the first sludge interface height sensor is arranged in the front cavity, and the eighth liquid level sensor is arranged in the rear cavity;

a sludge return pipe group comprising: the sewage treatment device comprises a return pipe body, a branch flow pipe, a first sludge pump, a first electromagnetic valve and a second electromagnetic valve, wherein the branch flow pipe is communicated with the return pipe body, the first sludge pump and the first electromagnetic valve are arranged on the return pipe body, the second electromagnetic valve is arranged on the branch flow pipe, one end of the return pipe body is arranged at the bottom of the front cavity, the other end of the return pipe body is arranged in the anaerobic tank, and the branch flow pipe is communicated with a sewage disposal tank;

the disinfection pool is communicated with the third submersible pump, and a fourth liquid level sensor and a chlorine dioxide generator are arranged in the disinfection pool;

One end of the second water pump is communicated with the disinfection tank;

the second clear liquid pool is communicated with the other end of the second water pump and used for storing second clear liquid, and a fifth liquid level sensor, a second turbidity sensor, a first pH value sensor, a first COD sensor, a first BOD sensor and a first conductivity sensor are arranged in the second clear liquid pool;

the control unit is used for controlling the control unit, respectively with the first water pump, the first stirrer, the first liquid level sensor, the first submersible pump, the first turbidity sensor, the ammonia nitrogen sensor, the second liquid level sensor, the second submersible pump, the aerator, the suspended filler dispenser, the third liquid level sensor, the eighth liquid level sensor, the first sludge interface height sensor, the third submersible pump, the first sludge pump, the first electromagnetic valve, the second electromagnetic valve, the fourth liquid level sensor, the chlorine dioxide generator, the second water pump, the fifth liquid level sensor, the second turbidity sensor, the first pH value sensor, the first COD sensor the third COD sensor, the first dissolved oxygen sensor, the first BOD sensor, the first conductivity sensor, the sixth liquid level sensor, the third water pump, the polyaluminum chloride solution adder, the first flowmeter, the third solenoid valve, the polyacrylamide solution adder, the second flowmeter, the third flowmeter, the fourth solenoid valve, the fifth solenoid valve, the first flow control valve, the second flow control valve, the seventh liquid level sensor, the third turbidity sensor, the second pH sensor, the second COD sensor, the second BOD sensor, the second conductivity sensor, and the second stirrer are electrically connected.

The intelligent purification system for the coal mine sewage provided by the invention further comprises:

the slag pool is arranged below the slag discharging pipe and used for receiving slag discharged by the slag discharging pipe, and a second sludge interface height sensor is arranged in the slag pool;

one end of the second sludge pump is communicated with the slag pool;

the filter press is communicated with the other end of the second sludge pump;

the receiving tank is arranged below the discharge port of the filter press, and an electronic weighing device is arranged on the inner bottom surface;

and the second sludge interface height sensor, the second sludge pump, the electronic weighing device and the filter press are respectively and electrically connected with the control unit.

In a second aspect, the invention also provides a system control method, which is suitable for the intelligent purification system of coal mine sewage, and comprises the following steps:

acquiring a first liquid level value of a first liquid level sensor, and controlling a first water pump to start and controlling a first stirrer to start if the first liquid level value is smaller than or equal to a preset first liquid level threshold value;

acquiring a first ammonia nitrogen concentration value of an ammonia nitrogen sensor, a first turbidity value of a first turbidity sensor and a third chemical oxygen demand of a third COD sensor, wherein if the first ammonia nitrogen concentration value is smaller than a preset ammonia nitrogen concentration threshold value, the first turbidity value is larger than a preset first turbidity threshold value and the third chemical oxygen demand is smaller than a preset first chemical oxygen demand threshold value, the first submersible pump is controlled to be started;

Acquiring a third liquid level value of a second liquid level sensor, and controlling the first submersible pump to stop if the third liquid level value is greater than or equal to a preset third liquid level threshold value; controlling the aerator to start; controlling the suspension filler dispenser to perform dispensing according to a preset first dispensing quantity; taking the last throwing of the suspended filler throwing device as a first time node, adding a preset oxygen reaction time period to obtain a second time node, and controlling a second submersible pump to start when the first dissolved oxygen concentration value of the first dissolved oxygen sensor is larger than or equal to a preset first dissolved oxygen concentration threshold value after the second time node is reached;

acquiring a fourth liquid level value of a third liquid level sensor, and controlling the second submersible pump to stop if the fourth liquid level value is greater than or equal to a preset fourth liquid level threshold value;

acquiring a first sludge height value of a first sludge interface height sensor, and controlling a first sludge pump to start and controlling a first electromagnetic valve to open and a second electromagnetic valve to close if the first sludge height value is larger than or equal to a preset first sludge threshold value;

acquiring a second turbidity value of the first turbidity sensor, and if the second turbidity value is larger than or equal to a preset second turbidity threshold value, controlling the first electromagnetic valve to be closed and controlling the second electromagnetic valve to be opened; acquiring a sixth liquid level value of an eighth liquid level sensor, and controlling the third submersible pump to start if the sixth liquid level value is larger than or equal to a preset sixth liquid level threshold;

Acquiring a seventh liquid level value of the fourth liquid level sensor, and controlling the third submersible pump to stop and simultaneously controlling the chlorine dioxide generator to start if the seventh liquid level value is larger than or equal to a preset seventh liquid level threshold value; starting the chlorine dioxide generator as a third time node, adding a preset disinfection reaction time period to obtain a fourth time node, and controlling the second water pump to start when the fourth time node is reached; acquiring an eighth liquid level value of a fifth liquid level sensor, and controlling the second water pump to stop if the eighth liquid level value is greater than or equal to a preset eighth liquid level threshold value;

and acquiring and recording a third turbidity value of the second turbidity sensor, a first pH value of the first pH value sensor, a first chemical oxygen demand of the first COD sensor, a first biological oxygen demand of the first BOD sensor and a first conductivity value of the first conductivity sensor one by one.

The system control method provided by the invention further comprises the following steps:

acquiring a ninth liquid level value of a sixth liquid level sensor and acquiring a tenth liquid level value of a seventh liquid level sensor, wherein if the ninth liquid level value is larger than a preset ninth liquid level threshold value and the tenth liquid level value is smaller than or equal to a tenth liquid level threshold value, a third water pump is controlled to start, and the third water pump is controlled to stop until the tenth liquid level value is larger than or equal to an eleventh liquid level threshold value, wherein the eleventh liquid level threshold value is larger than the tenth liquid level threshold value;

Under the condition that the third water pump is started, opening a third electromagnetic valve, a fourth electromagnetic valve and a fifth electromagnetic valve, controlling a first flow control valve to perform a first opening according to a preset first flow value, and controlling a second flow control valve to perform a first opening according to a preset second flow value; and controlling the second stirrer to start;

and acquiring and recording a fourth turbidity value of the third turbidity sensor, a second pH value of the second pH value sensor, a second chemical oxygen demand of the second COD sensor, a second biological oxygen demand of the second BOD sensor and a second conductivity value of the second conductivity sensor one by one.

acquiring a second sludge height value of a second sludge interface height sensor, and controlling a second sludge pump and a filter press to be started if the second sludge height value is larger than a preset second sludge threshold value;

acquiring a first weight value g of the electronic scale ₁ And a third flow rate value Q of the third flow meter ₃ And performing first recording;

acquiring a second weight value g of the electronic weighing device after a preset time period ₂ And a fourth flow value Q of the third flow meter ₄ And performing second recording;

and (3) calculating: （1）

R in the formula (1) represents the slag rate of the system, g ₁ Represents a first weight value g ₂ Represents a second weight value, Q ₃ Represents a third flow rate value, Q ₄ Representing a fourth flow value, ρ representing the density of coal mine wastewater;

and (3) adjusting: if R is smaller than the preset slag rate threshold value, controlling the first flow control valve and the second flow control valve to carry out the (n+1) th opening, wherein the (n+1) th opening is increased by (11-N)% on the basis of the first opening; and (n+1) slag rate calculation is carried out;

if R is larger than the preset slag rate threshold value, controlling the first flow control valve and the second flow control valve to carry out the (n+1) th opening, wherein the (n+1) th opening is reduced by (11-N) percent on the basis of the first opening; and (n+1) slag rate calculation is carried out;

and when N is greater than 10, the adjustment is carried out according to the increment or decrement of 1% until the preset slag tap rate threshold is reached.

The beneficial effects of the invention are as follows:

according to the intelligent purification system for the coal mine sewage and the control method thereof, provided by the invention, the anaerobic tank, the aerobic tank, the biological film tank and the disinfection tank are additionally arranged on the basis of the prior art to remove organic matters and inorganic matters from the coal mine sewage and reduce the numerical values of COD, BOD and the like, so that the problem that the content of the organic matters, the inorganic matters and the like in the sewage cannot be reduced in the coal mine sewage treatment system in the prior art is effectively solved, and meanwhile, the real-time monitoring and the real-time control on the aerobic tank, the anaerobic tank, the suspended filler dispenser, the pollution discharge condition and the like can be realized by the control unit.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the embodiments or the drawings needed in the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a system for purifying a first clear liquid according to the present invention;

FIG. 2 is a schematic diagram of a particulate matter separation system according to the present invention;

FIG. 3 is a schematic cross-sectional view of a cyclone separator tank according to the present invention;

FIG. 4 is a flow chart of a system control method for purifying a first clear liquid provided by the invention;

FIG. 5 is a flow chart of a control method of the particulate matter separation group system provided by the present invention;

fig. 6 is a flowchart of a control method of the slag discharging system provided by the invention.

Reference numerals:

1. a first water pump; 2. an anaerobic tank; 3. a first agitator; 4. a first liquid level sensor; 5. a first submersible pump; 6. a first turbidity sensor; 7. an ammonia nitrogen sensor; 8. an aerobic tank; 9. a second liquid level sensor; 10. a second submersible pump; 11. an aerator; 12. a filler separation net; 13. a suspended filler dispenser; 14. a biofilm pool; 15. a third liquid level sensor; 16. an eighth liquid level sensor; 17. a first sludge interface height sensor; 18. a third submersible pump; 19. a biofilm group; 20. a return pipe body; 21. a branch flow pipe; 22. a first sludge pump; 23. a first electromagnetic valve; 24. a second electromagnetic valve; 25. a sterilizing pool; 26. a fourth liquid level sensor; 27. a chlorine dioxide generator; 28. a second water pump; 29. a second clear liquid pool; 30. a fifth liquid level sensor; 31. a second turbidity sensor; 32. a first pH sensor; 33. a first COD sensor; 34. a first BOD sensor; 35. a first conductivity sensor; 36. an adjusting tank; 37. a sixth liquid level sensor; 38. a third water pump; 39. a third flowmeter; 40. a mixing tank; 41. a polyaluminium chloride solution adder; 42. a first flowmeter; 43. a third electromagnetic valve; 44. a first flow control valve; 45. a cyclone separator tank; 4501. a filter screen; 4502. a liquid inlet pipe; 4503. a liquid outlet pipe; 4504. a slag discharge pipe; 46. a polyacrylamide solution adder; 47. a second flowmeter; 48. a fourth electromagnetic valve; 49. a second flow control valve; 50. a first clear liquid pool; 51. a fifth electromagnetic valve; 52. a seventh liquid level sensor; 53. a third turbidity sensor; 54. a second pH sensor; 55. a second COD sensor; 56. a second BOD sensor; 57. a second conductivity sensor; 58. a second stirrer; 59. a slag pool; 60. a second sludge interface height sensor; 61. a second sludge pump; 62. a filter press; 63. a receiving pool; 64. an electronic scale; 65. a third COD sensor; 66. a first dissolved oxygen sensor.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience in describing the embodiments of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.

In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, schematic representations of the above terms are not directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The technical solution of the present invention is described below with reference to the embodiments shown in fig. 1 to 6: wherein, as shown in fig. 1, 2 and 3:

the embodiment of the invention provides an intelligent purification system for coal mine sewage, which comprises the following components:

the particle separation group is used for primarily separating particles and suspended matters of coal mine sewage and obtaining first clear liquid;

it is understood that the particulate matter separation group may be a flocculation sedimentation device in the prior art, or may be a cyclone flocculation separation system provided in the embodiment of the present invention, and the specific structure will be described in detail in the following embodiments. In this embodiment, only the particulate matter separation group is required to provide coal mine sewage from which suspended matters and particulate matters are removed.

As shown in fig. 2, the particulate matter separation group includes: a regulating tank 36, a third water pump 38, a mixing tank 40, a third flowmeter 39, a polyaluminum chloride solution adder 41, a cyclone tank 45, a polyacrylamide solution adder 46, and a first clear liquid tank 50, wherein,

the adjusting tank 36 is communicated with a coal mine sewage source and is used for adjusting the initial water storage amount of the coal mine sewage, and a sixth liquid level sensor 37 is arranged in the adjusting tank 36;

it can be understood that the liquid level in the regulating tank 36 can be monitored in real time by the sixth liquid level sensor 37, and further, the automatic control of the start and stop of the third water pump 38 can be realized by presetting a liquid level threshold value, so as to ensure that the sewage can be timely input to the system according to different requirements.

A third water pump 38 which is communicated with the regulating tank 36 through a pipeline and is used for extracting coal mine sewage;

a mixing tank 40 in communication with the third water pump 38 via a conduit;

a third flowmeter 39 provided on a pipe between the mixing tank 40 and the third water pump 38;

a polyaluminum chloride solution adder 41 which is communicated with the mixing tank 40 through a pipeline and is used for adding polyaluminum chloride solution into the mixing tank 40, wherein a first flowmeter 42, a third electromagnetic valve 43 and a first flow control valve 44 are arranged on an output pipeline of the polyaluminum chloride solution adder 41;

A polyacrylamide solution adder 46 which is connected to the connection pipe between the mixing tank 40 and the cyclone tank 45 via a pipe, and which adds a polyacrylamide solution to the pipe; the output pipeline of the polyacrylamide solution adder 46 is provided with a second flowmeter 47, a fourth electromagnetic valve 48 and a second flow control valve 49;

it can be understood that the output pipe of the polyaluminum chloride solution adder 41 is arranged between the third water pump 38 and the mixing tank 40, so that the polyaluminum chloride solution can be added in the process of outputting sewage by the third water pump 38, namely, in the flowing of the sewage, and can be more quickly dissolved in the sewage; by arranging the mixing tank 40, the full mixing of the polyaluminum chloride solution and the sewage can be realized, so that the flocculation efficiency is higher; after mixing in the mixing tank 40, adding the mixture by the polyacrylamide solution adder 46, so as to further flocculate, and make the sewage clearer, and also add the polyacrylamide solution in the flowing process of the mixture; the liquid inlet of the mixing tank 40 is arranged at the lower end, and the liquid outlet is arranged at the top end, so that the mixing can be fully performed; the suspended substances in the sewage are stable colloid particles. The addition of polyaluminium chloride can compress the electric double layer, destroy the stability among colloids, and enable colloid particles to be coagulated together, so that the colloid particles in the sewage are instable. The main function of polyacrylamide is to adsorb opposite colloidal particles and bridge, which causes small flocs to quickly aggregate together and become larger flocs to quickly flocculate and precipitate. Therefore, when the method is used in sewage treatment, firstly, the polyaluminum chloride is added, and then the polyacrylamide is added, so that a better use effect is achieved. The polyaluminum chloride has the characteristics of wide adaptation water area, wide pH value application range and the like, and the price of the polyaluminum chloride is far lower than that of polyacrylamide. In terms of the usage amount, the polyaluminum chloride is much higher than the polyacrylamide, and the general adding proportion is 10:1.

The cyclone separation tank 45 is communicated with the mixing tank 40 through a pipeline, a filter screen 4501 is arranged in the cyclone separation tank 45, the shape of the filter screen 4501 is the same as the shape of an inner cavity of the cyclone separation tank 45, a certain distance is reserved between the filter screen 4501 and the inner cavity wall of the cyclone separation tank 45, a flocculation filter cavity is formed, a clear water cavity is formed inside the filter screen 4501, a liquid inlet pipe 4502 of the cyclone separation tank 45 is arranged along the tangential direction of the wall surface of the cyclone separation tank 45 and is communicated with the flocculation filter cavity, and a liquid outlet pipe 4503 of the cyclone separation tank 45 is arranged at the top end of the cyclone separation tank 45 and is communicated with the clear water cavity; the slag discharge pipe 4504 of the cyclone separation tank 45 is arranged at the bottom end of the cyclone separation tank 45 and is communicated with the flocculation filter cavity;

it can be understood that the mixed liquid after flocculation directly flows into the flocculation filter cavity in the tangential direction of the wall surface of the cyclone separating tank to finally form cyclone, the floccule moves downwards, and the clear liquid moves upwards, so that the separation state is achieved, and the clear liquid and the floccule can be separated more efficiently and clearly through the arrangement of the filter screen 4501, and the filter screen 4501 is fixed on the inner wall of the cyclone separating tank 45 through a plurality of support rods, so that the equidistant arrangement of the flocculation filter cavity is ensured.

A first clear liquid tank 50 for storing a first clear liquid, which is communicated with a liquid outlet pipe 4503 of the cyclone separation tank 45 through a pipeline, a fifth electromagnetic valve 51 is arranged on the pipeline between the second clear liquid tank 29 and the cyclone separation tank 45, a seventh liquid level sensor 52, a third turbidity sensor 53, a second pH value sensor 54, a second COD sensor 55, a second BOD sensor 56 and a second conductivity sensor 57 are arranged in the second clear liquid tank 29, the first water pump 1 is communicated with the first clear liquid tank 50, and a second stirrer 58 is also arranged in the first clear liquid tank 50;

It will be appreciated that the respective arrangements of the third turbidity sensor 53, the second pH sensor 54, the second COD sensor 55, the second BOD sensor 56 and the second conductivity sensor 57 allow for comparison with the data of the first pH sensor 32, the first COD sensor 33, the first BOD sensor 34 and the second conductivity sensor 57, etc., thereby facilitating the adjustment of the process by the staff. The second agitator 58 may not cause the sludge in the first supernatant to settle.

The sixth liquid level sensor 37, the third water pump 38, the polyaluminum chloride solution adder 41, the first flowmeter 42, the third electromagnetic valve 43, the polyacrylamide solution adder 46, the second flowmeter 47, the third flowmeter 39, the fourth electromagnetic valve 48, the fifth electromagnetic valve 51, the first flow rate control valve 44, the second flow rate control valve 49, the seventh liquid level sensor 52, the third turbidity sensor 53, the second pH sensor 54, the second COD sensor 55, the second BOD sensor 56, the second conductivity sensor 57, and the second stirrer 58 are electrically connected to the control unit, respectively.

It will be appreciated that the control unit and the connection to the control unit are identical to those described in the above embodiments, i.e. the industrial integrated controller and the PLC module.

As shown in fig. 1, the intelligent decontamination system further includes: a first water pump 1, an anaerobic tank 2, an aerobic tank 8, a suspended filler dispenser 13, a biological film tank 14, a sludge reflux pipe group, a disinfection tank 25, a second water pump 28, a second clear liquid tank 29 and a control unit, wherein:

a first water pump 1 communicated with the particulate matter separation group and used for extracting a first clear liquid;

the anaerobic tank 2 is communicated with the first water pump 1 through a pipeline, a first stirrer 3 is arranged in the anaerobic tank 2, the first stirrer 3 is used for preventing sludge from precipitating, and a first liquid level sensor 4, a first submersible pump 5, a first turbidity sensor 6, a third COD sensor 65 and an ammonia nitrogen sensor 7 are arranged in the anaerobic tank 2; the first submersible pump 5 is used for pumping liquid in the anaerobic tank 2;

it will be appreciated that the organic matter in the first clear liquid can be removed by the arrangement of the anaerobic tank 2. In the anaerobic tank 2, organic substances in the sewage are decomposed into methane, carbon dioxide, water, and the like by anaerobic bacteria. The decomposition products can be recycled as energy sources, and simultaneously, the content of organic matters in the sewage is reduced, so that the biodegradability of the sewage is improved. In addition, the anaerobic tank 2 can remove suspended matters and partial nitrogen, phosphorus and other nutrient substances in the sewage, thereby further purifying the sewage.

The arrangement of the stirrer can enable the biological sludge in the anaerobic tank 2 to be more fully mixed with sewage, so that the reaction efficiency is quickened; the liquid level in the anaerobic tank 2 can be monitored in real time through the arrangement of the first liquid level sensor 4, and further, the automatic control on the start and stop of the first water pump 1 can be realized through the preset liquid level threshold value, so that certain first clear liquid is always provided in the anaerobic tank 2;

by the arrangement of the third COD sensor 65, the Chemical Oxygen Demand (COD) in the anaerobic tank 2 can be monitored in real time, so that the content of organic matters is obtained; since COD is an indicator of how much reducing substances are contained in a constant amount of water, and the reducing substances are mainly organic substances in water, chemical oxygen demand is often used as an indicator of how much organic substances are contained in a constant amount of water. The larger the chemical oxygen demand, the more serious the pollution of the water body by the organic matters.

By the arrangement of the first turbidity sensor 6 and the ammonia nitrogen sensor 7, the turbidity and the ammonia nitrogen content in the anaerobic tank 2 can be monitored in real time, and when the turbidity in the anaerobic tank 2 reaches a certain value, the distribution of biological sludge is uniform, and microorganisms are actively propagated; when the ammonia nitrogen content and COD are reduced below a certain value, the anaerobic tank 2 can be determined to react to reach the standard, and the first submersible pump 5 can be further started to suck.

The aerobic tank 8 is communicated with the first submersible pump 5 through a pipeline, a second liquid level sensor 9, a second submersible pump 10, a first dissolved oxygen sensor 66 and a plurality of aerators 11 are arranged in the aerobic tank 8, the aerators 11 are arranged at the bottom of the aerobic tank 8, and the aerators 11 are used for oxygenating the interior of the aerobic tank 8; a filler separation net 12 is arranged in the aerobic tank 8 to separate the aerobic tank 8 into a filler cavity and a suction cavity; the second submersible pump 10 is arranged in the suction cavity;

it can be understood that the liquid level in the aerobic tank 8 can be monitored in real time through the arrangement of the second liquid level sensor 9, and further, the stopping of the first submersible pump 5 can be automatically controlled through the preset liquid level threshold value, so that certain liquid treated by the anaerobic tank 2 is always reserved in the aerobic tank 8;

by the arrangement of the first dissolved oxygen sensor 66, the concentration of the dissolved oxygen in the aerobic tank 8 can be monitored in real time, because in the aerobic tank 8, the concentration of the dissolved oxygen is a key parameter, because the aerobic microorganisms need oxygen for respiration. The dissolved oxygen level in the aerobic tank 8 can be monitored by a dissolved oxygen sensor to ensure the normal growth and metabolism of microorganisms. If the dissolved oxygen is problematic, the process parameters can be adjusted in time.

The oxygen can be oxygenated in time to the aerobic tank 8 through the arrangement of the aerator 11;

by providing the filler separating net 12, the suspended filler can be blocked without sucking the suspended filler into the second submersible pump 10, so that the second submersible pump 10 needs to be arranged in the suction cavity, and the suspended filler dispenser 13 is arranged above the filler cavity.

The suspended filler dispenser 13 is arranged above the filler cavity and is used for dispensing suspended filler into the aerobic tank 8;

it will be appreciated that the suspended filler dispenser 13 employs a one-by-one dispensing mechanism, i.e. the number of dispenses is countable and controllable, to facilitate later control of the amount dispensed. And the gaps of each suspended filler are hung with an activated sludge film to be used as a biological fluidized bed with a larger area, so as to provide a growing bed with a larger area for bacterial groups such as aerobic bacteria.

The biological membrane tank 14 is internally provided with a third liquid level sensor 15, an eighth liquid level sensor 16, a first sludge interface height sensor 17, a third submersible pump 18 and a biological membrane group 19, wherein the biological membrane group 19 divides the inner cavity of the biological membrane tank 14 into a front cavity and a rear cavity, the front cavity is communicated with the second submersible pump 10 through a pipeline, the third liquid level sensor 15 is arranged in the front cavity, the third submersible pump 18 is arranged in the rear cavity, the first sludge interface height sensor 17 is arranged in the front cavity, and the eighth liquid level sensor 16 is arranged in the rear cavity;

It will be appreciated that the third level sensor 15 monitors the level of the liquid in the front chamber in real time, and the eighth level sensor 16 monitors the level of the liquid in the rear chamber in real time, and because the inflow of liquid in the front chamber is large, it takes more time to filter by the biofilm, so that the front chamber and the rear chamber have a certain level difference; of course, it is also possible to control the start and stop of the second submersible pump 10 and the third submersible pump 18 respectively;

the biological membrane group 19 can be an ultrafiltration flat membrane, the material is PVDF (polyvinylidene fluoride), the average pore diameter of the membrane is 0.1 micron, the solid particles in the sewage can be efficiently separated, the sludge concentration is improved, microorganisms are trapped, and the water quality of the effluent is ensured to be stable.

By means of the provision of the first sludge interface level sensor 17, monitoring of the level of the trapped sludge can be achieved, and when a certain level is reached, the first sludge pump 22 can be started for suction, the specific construction of which will be described below.

A sludge return pipe group comprising: the sewage treatment device comprises a return pipe body 20, a branch pipe 21, a first sludge pump 22, a first electromagnetic valve 23 and a second electromagnetic valve 24, wherein the branch pipe 21 is communicated with the return pipe body 20, the first sludge pump 22 and the first electromagnetic valve 23 are arranged on the return pipe body 20, the second electromagnetic valve 24 is arranged on the branch pipe 21, one end of the return pipe body 20 is arranged at the bottom of a front cavity, the other end of the return pipe body is arranged in an anaerobic tank 2, and the branch pipe 21 is communicated with a sewage disposal tank;

It will be appreciated that the return pipe body 20 extends to the bottom of the front cavity of the bio-film tank 14 so as to facilitate the suction of most of the sludge, the other end extends into the anaerobic tank 2 to provide a higher concentration of microbial sludge to the anaerobic tank 2, when the turbidity in the anaerobic tank 2 reaches a preset value, the sludge cannot be introduced into the anaerobic tank 2, and at the moment, the sludge needs to be discharged outwards, and at the moment, the first electromagnetic valve 23 is controlled to be closed, and the second electromagnetic valve 24 is controlled to be opened;

a disinfection tank 25 which is communicated with the third submersible pump 18 through a pipeline and is internally provided with a fourth liquid level sensor 26 and a chlorine dioxide generator 27;

a second water pump 28, one end of which is communicated with the disinfection tank 25 through a pipeline;

a second clear liquid tank 29, which is communicated with the other end of the second water pump 28 through a pipeline and is used for storing second clear liquid, wherein a fifth liquid level sensor 30, a second turbidity sensor 31, a first pH value sensor 32, a first COD sensor 33, a first BOD sensor 34 and a first conductivity sensor 35 are arranged in the second clear liquid tank;

it will be appreciated that each sensor may monitor the water quality in the second fluid reservoir 29, record the results and transmit them to the control unit for the operator to know.

The control unit is electrically connected with the first water pump 1, the first stirrer 3, the first liquid level sensor 4, the first submersible pump 5, the first turbidity sensor 6, the ammonia nitrogen sensor 7, the second liquid level sensor 9, the second submersible pump 10, the aerator 11, the suspended filler dispenser 13, the third liquid level sensor 15, the eighth liquid level sensor 16, the first sludge interface height sensor 17, the third submersible pump 18, the first sludge pump 22, the first electromagnetic valve 23, the second electromagnetic valve 24, the fourth liquid level sensor 26, the generator 27, the second water pump 28, the fifth liquid level sensor 30, the second turbidity sensor 31, the first pH value sensor 32, the first COD sensor 33, the first conductivity sensor 34 and the first conductivity sensor 35 respectively.

It can be understood that the control unit can be preferably a PLC module and an industrial integrated controller, and the electronic devices such as each sensor, the water pump, the stirrer and the like which need to be controlled and data acquisition are all connected to the I/O port of the PLC module, while the PLC module is connected with an industrial personal computer, and the operations such as interaction, control, monitoring and the like are completed through the industrial personal computer.

According to the intelligent purification system for the coal mine sewage, disclosed by the embodiment of the invention, the anaerobic tank 2, the aerobic tank 8, the biological film tank 14 and the disinfection tank 25 are additionally arranged on the basis of the prior art to remove organic matters and inorganic matters from the coal mine sewage and reduce the numerical values of COD, BOD and the like, so that the problem that the content of the organic matters, the inorganic matters and the like in the sewage cannot be reduced in the coal mine sewage treatment system in the prior art is effectively solved, and meanwhile, the aerobic tank 8, the anaerobic tank 2, the suspended filler dispenser 13, the pollution discharge condition and the like can be monitored and controlled in real time by the arrangement of the control unit, so that the intelligent control is truly realized by the control unit.

According to the coal mine sewage intelligent purification system provided by the embodiment of the invention, as shown in fig. 2, the system further comprises:

the slag pool 59 is arranged below the slag discharge pipe 4504 and is used for receiving slag discharged by the slag discharge pipe 4504, and a second sludge interface height sensor 60 is arranged in the slag pool 59;

A second sludge pump 61 which is communicated with the slag pool 59 through a pipe;

a filter press 62 which is communicated with the second sludge pump 61 through a pipe;

the receiving tank 63 is arranged below the discharge port of the filter press 62, and an electronic weighing device 64 is arranged on the inner bottom surface of the receiving tank;

wherein the second sludge interface height sensor 60, the second sludge pump 61, the electronic scale 64 and the filter press 62 are electrically connected with the control unit, respectively.

It will be appreciated that the arrangement of the second sludge interface height sensor 60 is also for real-time monitoring of the height of sludge in the slag pool 59, when a certain height is reached, the control unit controls the second sludge pump 61 to start so as to pump the floccule to the filter press 62, meanwhile, the filter press 62 starts to work, and the electronic weighing device 64 is arranged at the inner bottom end of the receiving tank 63 so as to weigh the slag discharged by the filter press 62 and then perform data matching calculation with the third flowmeter 39, thereby obtaining the slag rate of the particulate matter separation group, and if the slag rate is too small, the input amount of the polyaluminum chloride solution and the polyacrylamide solution needs to be adjusted. Of course, the adjustment of the flow rate thereof is achieved by the first flow rate control valve 44 and the second flow rate control valve 49.

The invention also provides a system control method which is suitable for the intelligent purification system of the coal mine sewage, as shown in fig. 4, and comprises the following steps:

s101, acquiring a first liquid level value of a first liquid level sensor 4, and controlling the first water pump 1 to start if the first liquid level value is smaller than or equal to a preset first liquid level threshold value; acquiring a second liquid level value of the first liquid level sensor 4, and controlling the first water pump 1 to stop if the second liquid level value is greater than or equal to a preset second liquid level threshold value; wherein the second liquid level threshold is greater than the first liquid level threshold; and controls the first stirrer 3 to be started;

in this step, if the first liquid level value is smaller than or equal to the preset first liquid level threshold value, it is indicated that the liquid level in the anaerobic tank 2 is low, and the liquid needs to be continuously added, so that the first water pump 1 is started to pump the first clear liquid into the anaerobic tank 2; if the second liquid level value is larger than or equal to a preset second liquid level threshold value, the liquid level is too high and the liquid adding needs to be stopped, and the first water pump 1 is controlled to stop; simultaneously controlling the first stirrer 3 to start so that the sludge in the anaerobic tank 2 is fully mixed with the first clear liquid for reaction;

s102, acquiring and recording a first ammonia nitrogen concentration value of an ammonia nitrogen sensor 7; acquiring and recording a first turbidity value of the first turbidity sensor 6; acquiring a third chemical oxygen demand of the third COD sensor 65, wherein if the first ammonia nitrogen concentration value is smaller than a preset ammonia nitrogen concentration threshold value, the first turbidity value is larger than a preset first turbidity threshold value and the third chemical oxygen demand is smaller than a preset first chemical oxygen demand threshold value, the first submersible pump 5 is controlled to be started;

In this step, if the first ammonia nitrogen concentration value is smaller than the preset ammonia nitrogen concentration threshold, the first turbidity value is larger than the preset first turbidity threshold, and the third chemical oxygen demand is smaller than the preset first chemical oxygen demand threshold, it is indicated that the anaerobic reaction has reached the standard, and further extraction is needed to perform the aerobic reaction, so that the first submerged pump 5 is controlled to start.

S103, acquiring a third liquid level value of the second liquid level sensor 9, and controlling the first submersible pump 5 to stop if the third liquid level value is greater than or equal to a preset third liquid level threshold value; the aerator 11 is controlled to start; controlling the suspension filler dispenser 13 to dispense according to a preset first dispensing quantity; taking the last throwing of the suspended filler throwing device 13 as a first time node, adding a preset oxygen reaction time period to obtain a second time node, and controlling the second submersible pump 10 to start when the first dissolved oxygen concentration value of the first dissolved oxygen sensor 66 is larger than or equal to a preset first dissolved oxygen concentration threshold value after the second time node is reached;

in this step, when the second time node is reached and the first dissolved oxygen concentration value of the first dissolved oxygen sensor 66 is greater than or equal to the preset first dissolved oxygen concentration threshold, it indicates that the dissolved oxygen concentration value has reached the standard, the aerobic microorganisms are normally propagated, and when the second time node is reached, it indicates that the reaction time is enough to perform the next process, so that the second submersible pump 10 is controlled to be started.

S104, acquiring a fourth liquid level value of the third liquid level sensor 15, and controlling the second submersible pump 10 to stop if the fourth liquid level value is greater than or equal to a preset fourth liquid level threshold value; acquiring a fifth liquid level value of the third liquid level sensor 15, and controlling the second submersible pump 10 to start if the fifth liquid level value is smaller than a preset fifth liquid level threshold value;

in this step, it is mainly intended to keep the liquid level in the front chamber within a certain range.

S105, acquiring a first sludge height value of the first sludge interface height sensor 17, and controlling the first sludge pump 22 to start and simultaneously controlling the first electromagnetic valve 23 to open and the second electromagnetic valve 24 to close if the first sludge height value is greater than or equal to a preset first sludge threshold value;

in this step, by setting the first sludge threshold, the first sludge pump 22 can be timely extracted, so that the height of the sludge is not too high to affect the liquid level.

S106, acquiring a second turbidity value of the first turbidity sensor 6, and if the second turbidity value is greater than or equal to a preset second turbidity threshold value, controlling the first electromagnetic valve 23 to be closed and controlling the second electromagnetic valve 24 to be opened; acquiring a sixth liquid level value of the eighth liquid level sensor 16, and controlling the third submersible pump 18 to start if the sixth liquid level value is greater than or equal to a preset sixth liquid level threshold;

In this step, if the turbidity in the anaerobic tank 2 has reached the standard, the anaerobic tank 2 is not required to be filled with sludge, anaerobic microorganisms are enough, and adverse effects may be caused by adding the anaerobic microorganisms, at this time, the first electromagnetic valve 23 is controlled to be closed, and the second electromagnetic valve 24 is controlled to be opened to discharge redundant sludge.

S107, acquiring a seventh liquid level value of the fourth liquid level sensor 26, and if the seventh liquid level value is greater than or equal to a preset seventh liquid level threshold value, controlling the third submersible pump 18 to stop and simultaneously controlling the chlorine dioxide generator 27 to start; starting the chlorine dioxide generator 27 as a third time node, adding a preset disinfection reaction time period to obtain a fourth time node, and controlling the second water pump 28 to start when the fourth time node is reached; acquiring an eighth liquid level value of the fifth liquid level sensor 30, and controlling the second water pump 28 to stop if the eighth liquid level value is greater than or equal to a preset eighth liquid level threshold value;

s108, acquiring and recording the third turbidity value of the second turbidity sensor 31, the first pH value of the first pH value sensor 32, the first chemical oxygen demand of the first COD sensor 33, the first biological oxygen demand of the first BOD sensor 34 and the first conductivity value of the first conductivity sensor 35 one by one.

According to the system control method provided by the invention, as shown in fig. 5, the system control method further comprises:

s201, acquiring a ninth liquid level value of the sixth liquid level sensor 37 and acquiring a tenth liquid level value of the seventh liquid level sensor 52, wherein if the ninth liquid level value is greater than a preset ninth liquid level threshold and the tenth liquid level value is less than or equal to the tenth liquid level threshold, the third water pump 38 is controlled to be started, and the third water pump 38 is controlled to be stopped until the tenth liquid level value is greater than or equal to the eleventh liquid level threshold, wherein the eleventh liquid level threshold is greater than the tenth liquid level threshold;

s202, when the third water pump 38 is started, the third electromagnetic valve 43, the fourth electromagnetic valve 48 and the fifth electromagnetic valve 51 are controlled to be opened, the first flow control valve 44 is controlled to perform a first opening according to a preset first flow value, and the second flow control valve 49 is controlled to perform a second according to a preset second flow value; and controls the second agitator 58 to start;

in the step, the control is firstly performed according to the preset dosing flow, if the slag rate is small, the dosing flow is increased, and if the slag rate is large, the dosing flow is reduced.

S203, a fourth turbidity value of the third turbidity sensor 53, a second pH value of the second pH sensor 54, a second chemical oxygen demand of the second COD sensor 55, a second biological oxygen demand of the second BOD sensor 56 and a second conductivity value of the second conductivity sensor 57 are acquired and recorded one by one.

According to the system control method provided by the invention, as shown in fig. 6, the system control method further comprises:

s301, acquiring a second sludge height value of a second sludge interface height sensor 60, and controlling a second sludge pump 61 and a filter press 62 to be started if the second sludge height value is larger than a preset second sludge threshold value;

s302, acquiring a first weight value g of the electronic scale 64 ₁ And a third flow rate value Q of the third flow rate meter 39 ₃ And performing first recording; acquiring the second weight value g of the electronic scale 64 after a preset period of time has elapsed ₂ And fourth of the third flowmeter 39Flow value Q ₄ And performing second recording;

s303, calculating: （1）

r in the formula (1) represents the slag rate of the system, g ₁ Represents a first weight value g ₂ Represents a second weight value, Q ₃ Represents a third flow rate value, Q ₄ And represents a fourth flow value, and ρ represents the density of the coal mine sewage.

S304, adjusting: if R is smaller than the preset slag tap rate threshold, the first flow rate control valve 44 and the second flow rate control valve 49 are controlled to perform the (n+1) -th opening, and the (n+1) -th opening is increased by (11-N)% on the basis of the first opening; and (n+1) slag rate calculation is carried out;

if R is greater than the preset slag tap rate threshold, controlling the first flow rate control valve 44 and the second flow rate control valve 49 to perform the (n+1) -th opening, wherein the (n+1) -th opening is reduced by (11-N)% based on the first opening; and (n+1) slag rate calculation is carried out;

And when the N is greater than 10, the adjustment is carried out according to the increment or the decrement of 1 percent until a preset slag rate threshold value is reached, wherein the preset slag rate threshold value is the optimal slag rate calculated in advance, namely the optimal balance point of the economic cost of the purifying effect and the dosage.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intelligent purification system for coal mine sewage, comprising:

the third water pump is communicated with the regulating tank;

a mixing tank communicated with the third water pump;

a third flowmeter disposed between the mixing tank and the third water pump;

the first water pump is communicated with the first clear liquid pool;

the suspension filler dispenser is arranged above the filler cavity;

one end of the second water pump is communicated with the disinfection tank;

2. The intelligent purification system for coal mine wastewater of claim 1, further comprising:

one end of the second sludge pump is communicated with the slag pool;

the filter press is communicated with the other end of the second sludge pump;

3. A system control method suitable for the intelligent purification system of coal mine sewage as claimed in claim 2, comprising:

4. The system control method according to claim 3, characterized by further comprising:

5. The system control method according to claim 4, characterized by further comprising:

And (3) calculating: （1）