Coal mine water treatment system and coal mine water treatment method

Abstract

The invention provides a coal mine water treatment system and a coal mine water treatment method. The coal mine water treatment system comprises an impurity component identification module, a water quality detection module and a water quality detection module, wherein the impurity component identification module comprises a water quality sensor group and is used for detecting different physical, chemical and biological parameters in mine water based on the water quality sensor group; the self-adaptive water quality treatment module is used for dynamically adjusting a pretreatment process and the feeding amount and treatment strength of a pretreatment agent according to different detected physical, chemical and biological parameters in the mine water; the water producing module is used for filtering and outputting mine water by using a reverse osmosis membrane on the basis of a pretreatment process and the feeding amount and treatment strength of a pretreatment agent. According to the method, impurity component analysis is firstly carried out on mine raw water, a targeted solution is provided for treatment measures of the next stage, so that the influence of blockage, corrosion and the like of different water qualities in different regions on mine equipment is avoided, in addition, targeted pretreatment is carried out according to a water quality analysis result, the scaling blockage phenomenon on the surface of a reverse osmosis membrane is relieved, and the service life of the reverse osmosis membrane is prolonged. The service life of the reverse osmosis membrane is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of mining technology, and in particular to a coal mine water treatment system and a coal mine water treatment method. Background Art

[0002] ‌ Coal mine water mainly comes from groundwater in the roof aquifer, sandstone fissures, caves and goafs, as well as surface water infiltrating from the top rock layer, aquifers and fissures of coal-bearing strata, and a small amount of production wastewater generated by the use of hydraulic supports, equipment cooling, and water sprinkling to reduce dust during mining. The quality of mine water mainly depends on the original water quality of groundwater, and is affected by many factors such as coal dust, rock dust in the tunnel, and grease, emulsions, and waste discharged from mining activities, resulting in obvious differences in water quality between different mine waters. Many equipment in underground coal mine production (such as coal mining machines, hydraulic supports, tunneling machines, etc.) have high requirements for water quality. The impurity composition of untreated mine raw water is relatively complex. If untreated mine raw water is used directly, the suspended matter in the raw water will cause clogging of the filtration equipment and increase the equipment failure rate. If it is directly discharged without treatment, it will cause serious pollution to the surrounding water environment and cause ecological problems such as rivers and soil. In addition, if there are many impurities in the water, it will affect the recovery rate and quality of coal. Water treatment equipment can remove impurities from water, ensure the quality of water used for washing, and thus improve the quality of coal products. In the related technology, membrane treatment technology and equipment based on ultrafiltration, nanofiltration, reverse osmosis and other treatments are generally used to improve the quality of treated water. Among them, reverse osmosis membrane plays an important role in coal mine water treatment equipment. First, it can remove impurities and intercept suspended matter. It can intercept fine suspended particles in water and reduce the turbidity of water. Second, it has a desalination function, which can remove most of the inorganic salt ions in water. However, since the traditional method of using reverse osmosis membrane for coal mine water treatment provides a universal solution, there is no targeted analysis of water quality in different regions. However, there are large differences in water quality in different regions, resulting in differences in water quality after treatment using a universal solution, and the mine water source in the same region is also constantly changing, so that different water quality in different regions or water quality at different stages in the same region passes through water treatment equipment. The treated water quality is inconsistent, which is easy to cause blockage and corrosion to mining equipment. Summary of the invention

[0003] The present invention provides a coal mine water treatment system and a coal mine water treatment method, which are used to solve the defects that the traditional coal mine water treatment method does not make targeted analysis on the water quality in different regions, the treated water quality is inconsistent after passing through the water treatment equipment, and it is easy to cause blockage, corrosion and other effects on mining equipment.

[0004] The present invention provides a coal mine water treatment system, comprising: An impurity component identification module, wherein the impurity component identification module includes a water quality sensor group, and the impurity component identification module is used to detect different physical, chemical and biological parameters in the mine water based on the water quality sensor group; An adaptive water quality treatment module, used to dynamically adjust the pretreatment process and the amount of pretreatment reagents and the treatment intensity according to different physical, chemical and biological parameters in the mine water detected by the impurity component identification module; The water production module is used to filter and output the mine water using a membrane separation component based on the pretreatment process output by the adaptive water quality treatment module, the amount of pretreatment reagents added, and the treatment intensity.

[0005] The coal mine water treatment system provided by the present invention also includes: The series-parallel switching module of the membrane separation component includes a valve controller and multiple series valves and parallel valves installed at the front and rear ends of each group of reverse osmosis membranes. The valve controller is used to control the switching states of the multiple series valves and parallel valves to switch the connection relationship between each group of reverse osmosis membranes to dynamically adjust the water production and filtration accuracy.

[0006] According to the coal mine water treatment system provided by the present invention, the series-parallel switching module of the membrane separation assembly is also used for: When the impurities in the produced water exceed the preset water quality threshold, several reverse osmosis membranes are connected in series; When the water production is less than the preset water production threshold, several reverse osmosis membranes are connected in parallel.

[0007] The coal mine water treatment system provided by the present invention further comprises: a blockage degree monitoring module of the membrane separation component, wherein the blockage degree monitoring module of the membrane separation component comprises: A parameter change trend analysis unit, used to trigger a blocking alarm when the parameter change exceeds a preset trend alarm threshold; The mutation analysis unit is used to calculate the degree of parameter mutation within the standard time in real time. When the degree of parameter mutation within the standard time exceeds the preset mutation threshold, a fault prediction is performed based on the duration and amplitude of the mutation, and a blocking alarm is issued when a fault is predicted.

[0008] According to the coal mine water treatment system provided by the present invention, the parameter change trend analysis unit is also used for: Real-time monitoring of the blocking parameters of the reverse osmosis membrane, wherein the blocking parameters include at least one of the inlet water pressure, the pressure difference between the two sides of the reverse osmosis membrane, the flow difference, the water production, the salt permeability, the water production conductivity and the membrane filtration time; Calculate the decrease ratio of each blocking parameter relative to the initial value, and classify the pollution degree according to the decrease ratio. If the decrease ratio is ≤5%, it is judged as slight pollution; 5%≤decrease ratio≤10%, it is judged as light pollution; 10%≤decrease ratio≤20%, it is judged as moderate pollution; and the decrease ratio is ≥20%, it is judged as severe pollution.

[0009] According to the coal mine water treatment system provided by the present invention, the impurity component identification module further includes: A sampling component, the sampling component includes a sampling solenoid valve and a sampling pump; the sampling solenoid valve is used to control whether the mine water flows into the water quality sensor group; the sampling pump is used to provide power for the mine water to flow into the water quality sensor group; A rectifier component, the rectifier component includes a rectifier and a flow meter, the rectifier is used to rectify the incoming water flow; the flow meter is used to count the flow of mine water.

[0010] According to the coal mine water treatment system provided by the present invention, the adaptive water quality treatment module is also used for: Determine the type of mine water according to different physical, chemical and biological parameters in the mine water detected by the impurity component identification module, wherein the mine water types include suspended matter mine water, highly mineralized mine water, acidic mine water and iron and manganese containing mine water; For mine water containing suspended matter, the dosage of polyaluminium chloride and polyacrylamide is adjusted dynamically, and a circulating flocculation and sedimentation process is adopted to adjust the flocculation reaction and sedimentation time according to the content of suspended matter in the water after real-time treatment; For high-mineralized mine water, according to the water hardness data, dynamically adjust the amount of chemical agents added to adjust the hardness, increase the contact area of ​​ion exchange softening, increase the electrodialysis voltage, increase the number of nanofiltration salt separations, and increase the number of reverse osmosis stages; if the back end is connected to a membrane desalination treatment unit, adjust the amount of scale inhibitor added according to the water hardness data; For acid mine water, increase the input of the continuous alkali production system, increase the aeration volume, increase the contact area of ​​the strong alkaline anion exchange resin, and monitor the effluent pH value in real time. If the effluent pH value exceeds the preset threshold, add acid to adjust the pH value to meet the effluent requirements; For mine water containing iron and manganese, we increase the contact oxidation medium and the oxygen content of the aeration device.

[0011] The present invention also provides a coal mine water treatment method, which is applicable to any of the above-mentioned coal mine water treatment systems, comprising: Detection of different physical, chemical and biological parameters in mine water based on a water quality sensor cluster; Dynamically adjust the pretreatment process and the amount of pretreatment reagents and the treatment intensity according to different physical, chemical and biological parameters in the mine water detected by the impurity component identification module; Based on the pretreatment process output by the adaptive water quality treatment module, the dosage of the pretreatment agent and the treatment intensity, a membrane separation component is used to filter and output the mine water.

[0012] The method for treating coal mine water provided by the present invention further comprises: When the impurities in the produced water exceed the preset water quality threshold, several reverse osmosis membranes are connected in series; When the water production is less than the preset water production threshold, several reverse osmosis membranes are connected in parallel.

[0013] The method for treating coal mine water provided by the present invention further comprises: When the parameter change exceeds the preset trend alarm threshold, a blocking alarm is triggered; And / or, calculate the degree of parameter mutation within the standard time in real time. When the degree of parameter mutation within the standard time exceeds a preset mutation threshold, predict a fault based on the duration of the mutation and the amplitude of the mutation, and issue a blocking alarm when a fault is predicted.

[0014] The present invention provides a coal mine water treatment system and a coal mine water treatment method. The coal mine water treatment system includes an impurity component identification module, which includes a water quality sensor group. The impurity component identification module is used to detect different physical, chemical and biological parameters in the mine water based on the water quality sensor group; an adaptive water quality treatment module is used to dynamically adjust the pretreatment process and the amount of pretreatment agents added and the treatment intensity according to the different physical, chemical and biological parameters in the mine water detected by the impurity component identification module; a water production module is used to filter and output the mine water using a membrane separation component based on the pretreatment process and the amount of pretreatment agents added and the treatment intensity output by the adaptive water quality treatment module. The present invention first analyzes the impurity components of the mine raw water at the front end of water treatment and effectively identifies its water quality, providing targeted solutions for the treatment measures at the next level, so that different water qualities in different regions can be treated to have the same treated water quality, thereby avoiding the blockage, corrosion and other effects of different water qualities in different regions on mining equipment. In addition, targeted pretreatment is carried out according to the water quality analysis results to control the dosage and treatment intensity of each link, thereby reducing the scaling and blocking phenomenon on the surface of the reverse osmosis membrane and extending the service life of the reverse osmosis membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 is a functional structure diagram of a coal mine water treatment system provided by an embodiment of the present invention; Figure 2 is a liquid flow diagram provided by an embodiment of the present invention; Figure 3 is a valve electrical control diagram provided by an embodiment of the present invention; Figure 4 It is a schematic diagram of the working process of the impurity component identification module provided by an embodiment of the present invention; Figure 5 is a schematic diagram of the workflow of an adaptive water quality treatment module provided by an embodiment of the present invention; Figure 6 It is a flow chart of a coal mine water treatment method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Figure 1 The structural diagram of the coal mine water treatment system provided by the embodiment of the present invention includes: An impurity component identification module 101, wherein the impurity component identification module includes a water quality sensor group, and the impurity component identification module is used to detect different physical, chemical and biological parameters in the mine water based on the water quality sensor group; The adaptive water quality treatment module 102 is used to dynamically adjust the pretreatment process and the amount of pretreatment reagents and the treatment intensity according to different physical, chemical and biological parameters in the mine water detected by the impurity component identification module; The water production module 103 is used to filter and output the mine water using a membrane separation component based on the pretreatment process output by the adaptive water quality treatment module, the dosage of the pretreatment agent, and the treatment intensity.

[0019] The traditional method of using reverse osmosis membranes for coal mine water treatment provides a universal solution without making targeted analysis of water quality in different regions. However, there are large differences in water quality in different regions, resulting in differences in water quality after treatment using a universal solution. In addition, the mine water sources in the same region are constantly changing, resulting in inconsistent water quality in different regions or water quality at different stages in the same region after passing through water treatment equipment, which can easily cause blockage and corrosion to mining equipment.

[0020] The coal mine water treatment system provided by the embodiment of the present invention includes an impurity component identification module, which includes a water quality sensor group. The impurity component identification module is used to detect different physical, chemical and biological parameters in the mine water based on the water quality sensor group; an adaptive water quality treatment module is used to dynamically adjust the pretreatment process and the amount of pretreatment agents and the treatment intensity according to the different physical, chemical and biological parameters in the mine water detected by the impurity component identification module; a water production module is used to filter and output the mine water using a membrane separation component based on the pretreatment process and the amount of pretreatment agents and the treatment intensity output by the adaptive water quality treatment module. At the front end of water treatment, the impurity components of the mine raw water are analyzed and its water quality is effectively identified, providing targeted solutions for the next level of treatment measures, so that the different water qualities in different regions can be treated with the same water quality, thus avoiding the blockage and corrosion of mining equipment caused by different water qualities in different regions. In addition, targeted pretreatment is carried out according to the results of water quality analysis to control the dosage and treatment intensity of each link, thereby reducing the scaling and blockage on the surface of the reverse osmosis membrane and extending the service life of the reverse osmosis membrane.

[0021] Based on any of the above embodiments, the coal mine water treatment system further includes: The series-parallel switching module of the membrane separation component includes a valve controller and multiple series valves and parallel valves installed at the front and rear ends of each group of reverse osmosis membranes. The valve controller is used to control the switching states of the multiple series valves and parallel valves to switch the connection relationship between each group of reverse osmosis membranes to dynamically adjust the water production and filtration accuracy.

[0022] In an embodiment of the present invention, the series-parallel switching module of the membrane separation assembly is also used for: When the impurities in the produced water exceed the preset water quality threshold, several reverse osmosis membranes are connected in series; When the water production is less than the preset water production threshold, several reverse osmosis membranes are connected in parallel.

[0023] like Figure 2As shown, one series valve and one parallel valve are installed at the front and rear ends of each set of reverse osmosis membranes, totaling 8 series electric control valves and 8 parallel electric control valves, and all valves are independently connected to the reverse osmosis membranes. Figure 3 As shown in the figure, all the electronically controlled valves are opened or closed by the control system. The parallel valve B1-1 and the series valve C1-1 are connected to the water inlet of the reverse osmosis membrane group 1 through independent pipelines, and the parallel valve B1-2 and the series valve C1-2 are connected to the water outlet of the reverse osmosis membrane group 1 through independent pipelines. Other reverse osmosis membranes are connected to each valve in the same way.

[0024] Take 4 groups of reverse osmosis membranes as an example, among which the number of reverse osmosis membrane groups 1-4 can be the same or different, but it needs to be ≥1, and the model and type of the reverse osmosis membrane selected in each group can be the same or different. If 4 groups of reverse osmosis membranes are required to produce water in parallel, the control system will open the 8 parallel valves B1-1, B1-2, B2-1, B2-2, B3-1, B3-2, B4-1, B4-2, and close the 8 series valves C1-1, C1-2, C2-1, C2-2, C3-1, C3-2, C4-1, C4-2. At this time, the water is divided into 4 paths and passes through the 4 reverse osmosis membranes in parallel.

[0025] If 4 groups of reverse osmosis membranes are required to produce water in series, the control system opens the 8 parallel valves B1-1, C1-2, C2-1, C2-2, C3-1, C3-2, C4-1, and C4-2, and closes the 8 series valves B1-2, B2-1, B2-2, B3-1, B3-2, B4-1, and B4-2. At this time, water will pass through the reverse osmosis membranes No. 1 to 4 in series. Preferably, in order to reduce the operating resistance of the system, the reverse osmosis membrane groups No. 1 to 4 can select reverse osmosis membranes of different pressure types, and the pressure required for the operation of membranes from 1 to 4 is gradually reduced, that is, No. 1 is a high-pressure membrane and No. 4 is a low-pressure membrane. In this way, as the number of membrane groups in series increases, although the system pressure will decrease along the way, the pressure required for membrane operation is also gradually reduced to ensure the operating stability of the system.

[0026] Similarly, through the opening / closing combination logic of different valves, different series-parallel combinations such as 1# and 2# reverse osmosis membranes in series, 3# and 4# reverse osmosis membranes in parallel, or 1#-3# reverse osmosis membranes in series, 4# reverse osmosis membrane in parallel can be realized, thereby realizing a flexible series-parallel combination relationship of reverse osmosis membranes.

[0027] The water production of the reverse osmosis membrane parallel mode is greater than that of the series mode, but the filtration accuracy of the series mode is higher than that of the parallel mode. Therefore, the water production and filtration accuracy can be dynamically adjusted by adjusting the series-parallel relationship of several groups of reverse osmosis membranes. When the water quality is poor, several reverse osmosis membranes can be temporarily connected in series to improve the water quality. When the water production is insufficient, several reverse osmosis membranes can be temporarily connected in parallel to increase the water production.

[0028] When multiple groups of reverse osmosis membranes are connected in series, the calculation method of water production and rejection rate is different from that of a single reverse osmosis membrane. When calculating the water production, in a series system, the water production depends on the first membrane element (i.e., the first membrane element at the water inlet end), because the water inlet flow of the subsequent membrane element is the water production of the previous membrane element. Therefore, the water production of the entire series system is mainly determined by the first membrane element.

[0029] Basic formula: Q = A * S * P, where Q: water production, A: membrane area, S: water flux of the membrane (the amount of water passing through a unit membrane area per unit time under unit pressure), and P: effective pressure.

[0030] Water production in series: Assuming that all membrane elements are the same, the water production of the entire system is equal to the water production of the first membrane element.

[0031] If there are n identical reverse osmosis membranes connected in series, and the water production of each membrane when working normally alone is Q1, then the total water production after the series connection is Q_string≈Q1.

[0032] For example, if there are three identical reverse osmosis membranes connected in series, and the water production of each membrane when working alone is 10 cubic meters per hour, then the water production of the entire series system is also approximately 10 cubic meters per hour.

[0033] The rejection rate refers to the efficiency of the reverse osmosis membrane in removing specific substances (such as salt), usually expressed as a percentage. In a series system, as water passes through each membrane element, the concentration of the remaining unretained solute will gradually increase, so the theoretical rejection rate will also increase with each membrane element.

[0034] The rejection rate of a single membrane element: R1 = (C_in - C_out) / C_in * 100%, where R1: the rejection rate of a single membrane element, C_in: the solute concentration of the raw water entering the membrane element, C_out: the solute concentration of the permeate coming out of the membrane element; the total rejection rate of the series system: For the case of n membrane elements in series, the total rejection rate can be approximately considered as the cumulative effect of the rejection rates of each membrane element. If it is assumed that the rejection rate of each membrane element is R1, the total rejection rate R_total can be estimated by the following formula: R_total = 1 - (1 - R1)n For example, if there are 3 identical RO membranes in series, and each membrane has a rejection rate of 98%, the total rejection rate is approximately: R_total = 1 - (1 - 0.98) 3 ≈ 99.96%.

[0035] When multiple groups of reverse osmosis membranes are connected in parallel, the calculation method of water production and rejection rate is different from that of a single reverse osmosis membrane. When calculating water production, in a parallel system, all reverse osmosis membranes receive the same inlet pressure at the same time and produce permeate independently. Therefore, the total water production of the parallel system is equal to the sum of the water production of each membrane element.

[0036] Parallel water production: If there are n identical reverse osmosis membranes in parallel, the total water production of the entire system Q_parallel is: Q_parallel = n * Q1, where Q1 is the water production of a single membrane element.

[0037] For example, if there are 4 identical reverse osmosis membranes in parallel, and the water production of each membrane when working alone is 10 cubic meters / hour, the total water production of the entire parallel system is 40 cubic meters / hour.

[0038] In a parallel system, each membrane element treats the same concentration of feed water, so theoretically the rejection rate of each membrane element is the same. However, due to the influence of actual operating conditions (such as membrane fouling, uneven water flow distribution, etc.), the actual rejection rates of different membrane elements may be slightly different. But ideally, the total rejection rate of the parallel system can be considered to be the same as the rejection rate of a single membrane element.

[0039] The rejection rate of a single membrane element: R1 = (C_in - C_out) / C_in * 100%, R1: the rejection rate of a single membrane element, C_in: the solute concentration of the raw water entering the membrane element, C_out: the solute concentration of the permeate coming out of the membrane element, the total rejection rate of the parallel system: Assuming that the rejection rate of each membrane element is R1, the total rejection rate of the entire parallel system R_ is approximately R1.

[0040] For example, if there are 4 identical reverse osmosis membranes in parallel, and the rejection rate of each membrane is 98%, the total rejection rate of the entire parallel system is still 98%.

[0041] It should be noted that the embodiments of the present invention are not limited to the reverse osmosis treatment process, but are also applicable to membrane separation technologies such as ultrafiltration, microfiltration, and nanofiltration.

[0042] Traditional water treatment solutions cannot dynamically adjust the water production and quality, and cannot adjust the combined working mode of the reverse osmosis membrane in real time. The embodiments of the present invention can dynamically adjust the combination mode of multiple reverse osmosis membranes, flexibly change the series and parallel relationship of multiple reverse osmosis membranes, and thus dynamically adjust the water production and quality.

[0043] Based on any of the above embodiments, the coal mine water treatment system further includes: a blockage degree monitoring module of the membrane separation component, and the blockage degree monitoring module of the membrane separation component includes: A parameter change trend analysis unit, used to trigger a blocking alarm when the parameter change exceeds a preset trend alarm threshold; The mutation analysis unit is used to calculate the degree of parameter mutation within the standard time in real time. When the degree of parameter mutation within the standard time exceeds the preset mutation threshold, a fault prediction is performed based on the duration and amplitude of the mutation, and a blocking alarm is issued when a fault is predicted.

[0044] In an embodiment of the present invention, the parameter change trend analysis unit is further used for: Real-time monitoring of the blocking parameters of the reverse osmosis membrane, wherein the blocking parameters include at least one of the inlet water pressure, the pressure difference between the two sides of the reverse osmosis membrane, the flow difference, the water production, the salt permeability, the water production conductivity and the membrane filtration time; The reverse osmosis membrane pressure difference = 0.5 (inlet water pressure + concentrate water pressure) - produced water pressure); Calculate the decline ratio of each blocking parameter relative to the initial value, and classify the pollution degree according to the decline ratio. If the decline ratio is ≤5%, it is judged as slight pollution; 5%≤ decline ratio≤10%, it is judged as slight pollution; 10%≤ decline ratio≤20%, it is judged as moderate pollution; decline ratio≥20%, it is judged as severe pollution. Different treatment methods can be selected for the reverse osmosis membrane according to different pollution degrees. For slight pollution, the reverse osmosis membrane is flushed to reduce the degree of fouling, for moderate pollution, concentrated chemical agents are used for cleaning, and for severe pollution, high-concentration chemical agents are used for cleaning.

[0045] It should be noted that the embodiments of the present invention are not limited to the reverse osmosis treatment process, but are also applicable to membrane separation technologies such as ultrafiltration, microfiltration, and nanofiltration.

[0046] Traditional water treatment solutions have a single monitoring method for the pass rate of reverse osmosis membranes. Currently, they only rely on the pressure difference between the inlet and outlet of the reverse osmosis membrane to make judgments. It is difficult to make a more accurate assessment of the life of the reverse osmosis membrane. Once the pressure difference between the inlet and outlet of the reverse osmosis membrane is large, the reverse osmosis membrane is basically blocked and difficult to restore to a normal state, resulting in the scrapping of the reverse osmosis membrane and economic losses. The embodiments of the present invention identify the degree of blockage of the reverse osmosis membrane at an early stage, and use a variety of monitoring methods to reasonably judge the blockage state of the reverse osmosis membrane, so as to avoid serious blockage of the reverse osmosis membrane and thus scrapping it.

[0047] Based on any of the above embodiments, the impurity component identification module further includes: A sampling component, the sampling component includes a sampling solenoid valve and a sampling pump; the sampling solenoid valve is used to control whether the mine water flows into the water quality sensor group; the sampling pump is used to provide power for the mine water to flow into the water quality sensor group; A rectifier component, the rectifier component includes a rectifier and a flow meter, the rectifier is used to rectify the incoming water flow; the flow meter is used to count the flow of mine water.

[0048] like Figure 4 As shown, the impurity component identification module of mine water includes 10 water quality sensors: OIW oil-in-water sensor, pH sensor, DO dissolved oxygen sensor, SS suspended solid sensor, turbidity sensor, hardness sensor, conductivity sensor, chloride ion sensor, S2-sulfur ion sensor, and microbial content sensor.

[0049] Mine water enters the sampling solenoid valve, sampling pump, rectifier, flow meter in sequence through the water inlet pipeline, and then branches to various water quality sensors. When it is necessary to analyze the impurity components of the mine water, the control system opens the sampling solenoid valve, so that the mine water enters the impurity component identification module. When it is necessary to stop analyzing the mine water, the control system closes the sampling solenoid valve, and the mine water stops flowing into the impurity component identification module. The sampling pump is responsible for providing power for the mine water to flow into various water quality sensors. The rectifier is responsible for rectifying the water flow. The flow meter is responsible for real-time statistics of the flow of mine water, providing flow and volume basis for the subsequent parameter determination of the water quality sensor. The OIW oil-in-water sensor adopts the light scattering method, the pH sensor adopts the Ag / AgCl silver chloride reference electrode method, the DO dissolved oxygen sensor adopts the fluorescence quenching method, the SS solid suspended matter sensor adopts the infrared absorption scattered light method, the turbidity sensor adopts the cold light source narrow-band filtering method, the hardness sensor adopts the titration colorimetry method, the conductivity sensor adopts the annular multi-conductivity electrode method, the chloride ion sensor adopts the chloride ion selective electrode method, the S2-sulfur ion sensor adopts the methylene blue spectrophotometry method, and the microbial content sensor adopts a combination of flow cytometry FCM and adenosine triphosphate (ATP) bioluminescence method.

[0050] In some embodiments of the present invention, the impurity component identification module of mine water also includes a cleaning module, which is configured to: send the cleaning agent into the reagent tank. When the impurity identification module needs to be cleaned, the sampling solenoid valve and the sampling pump are first closed to stop the mine water from entering the module. The dosing pump sends the cleaning agent into the rectifier, and then the cleaning agent enters each sensor module for cleaning. After cleaning, the next sampling analysis can be carried out.

[0051] In some embodiments of the present invention, through online real-time detection of mine water, real-time collection of data including water flow, pressure, temperature, water quality components (such as conductivity, pH value, hardness, pollutant concentration, etc.) is carried out to quickly learn the water quality characteristics of users in different regions, pre-set several typical mine water templates, compare the quickly learned water quality characteristics with the preset mine water templates, generate corresponding water treatment measures, and provide a basis for the adaptive water quality treatment module.

[0052] Based on any of the above embodiments, the adaptive water quality treatment module is further used for: Determine the type of mine water according to different physical, chemical and biological parameters in the mine water detected by the impurity component identification module, the mine water types including suspended matter mine water, highly mineralized mine water, acidic mine water and iron and manganese containing mine water; For mine water containing suspended matter, the dosage of polyaluminium chloride and polyacrylamide is adjusted dynamically, and a circulating flocculation and sedimentation process is adopted to adjust the flocculation reaction and sedimentation time according to the content of suspended matter in the water after real-time treatment; For high-mineralized mine water, according to the water hardness data, dynamically adjust the amount of chemical agents added to adjust the hardness, increase the contact area of ​​ion exchange softening, increase the electrodialysis voltage, increase the number of nanofiltration salt separations, and increase the number of reverse osmosis stages; if the back end is connected to a membrane desalination treatment unit, adjust the amount of scale inhibitor added according to the water hardness data; For acid mine water, increase the input of the continuous alkali production system, increase the aeration volume, increase the contact area of ​​the strong alkaline anion exchange resin, and monitor the effluent pH value in real time. If the effluent pH value exceeds the preset threshold, add acid to adjust the pH value to meet the effluent requirements; For mine water containing iron and manganese, we increase the contact oxidation medium and the oxygen content of the aeration device.

[0053] like Figure 5 As shown, the water quality data obtained by the mine water impurity component identification module is compared with the preset centralized mine water characteristics. According to different water qualities, the operating parameters of each link of the water quality treatment module are dynamically adjusted based on the water quality parameters to adapt to the changing water inlet conditions.

[0054] If it is high-mineralized mine water, the amount of chemical agents (common agents include sodium carbonate, sodium bicarbonate, lime, etc.) added will be dynamically adjusted according to the water hardness data to adjust the hardness, increase the contact area of ​​ion exchange softening, increase the electrodialysis voltage, increase the number of nanofiltration salt separations, and increase the number of reverse osmosis stages; in addition, if the back end is connected to a membrane desalination treatment unit such as nanofiltration and reverse osmosis, the amount of scale inhibitor added can also be adjusted according to the water hardness data to avoid scaling of the reverse osmosis membrane and nanofiltration membrane.

[0055] If it is acidic mine water, increase the amount of continuous alkali addition system, increase the aeration volume, increase the contact area of ​​the strong alkaline anion exchange resin, and monitor the effluent pH value in real time. If excessive alkali is added, causing the effluent pH value to exceed the standard, add acid to adjust the pH value to meet the effluent requirements.

[0056] If it is mine water containing special pollutants, such as mine water containing iron and manganese, the oxidation precipitation of iron and manganese in the mine water can be accelerated by increasing the contact oxidation medium and the oxygen content of the aeration device.

[0057] The traditional water treatment scheme only performs physical filtration at the front end of the reverse osmosis membrane. Physical filtration can only remove physical impurities with larger particle sizes in the raw water of the mine, without processing other impurities. After filtration, the untreated microorganisms in the water will multiply on the surface of the reverse osmosis membrane, and impurities such as calcium and magnesium ions will form chemical scaling on the surface of the reverse osmosis membrane, thereby reducing the permeability of the reverse osmosis membrane and affecting the water production effect. Under the premise of effectively identifying the characteristics of mine water, the embodiment of the present invention performs targeted pretreatment on the filtered water passing through the reverse osmosis membrane, and adopts an adaptive control algorithm to control the dosage and processing intensity of each link, thereby reducing the scaling and blocking phenomenon on the surface of the reverse osmosis membrane and extending the service life of the reverse osmosis membrane.

[0058] The coal mine water treatment system provided by the present invention is divided into four modules: a mine water impurity component identification module, an adaptive water quality treatment module, a series-parallel switching module of a membrane separation component, and a reverse osmosis membrane separation component blocking degree monitoring module, aiming at the water quality detection of mine water, the pre-stage pretreatment of reverse osmosis membranes, the combination optimization of reverse osmosis membranes, and the life monitoring of reverse osmosis membranes. The system can directly detect the impurity components of mine water in real time in the mine, has preset typical modules for comparison, can quickly learn the water quality characteristics of a specific mine, and is convenient for generating corresponding water treatment measures. According to the mine water analysis results, targeted water treatment measures are taken, and the processing degree of each link is controlled by an adaptive algorithm, which has good applicability to different coal mines. Several groups of reverse osmosis membranes can be flexibly changed in series and parallel, and the water production and water production accuracy can be dynamically adjusted according to the water production situation. The blocking degree of the reverse osmosis membrane is more reasonably identified, and a comprehensive judgment is made from multiple dimensions such as long-term trend, short-term mutation, alarm threshold, decline ratio, and advance prediction, so that the judgment of the blocking degree of the reverse osmosis membrane is more reasonable.

[0059] The embodiment of the present invention further provides a coal mine water treatment method, which is applicable to the coal mine water treatment system described in any of the above embodiments, comprising: Step 601, detecting different physical, chemical and biological parameters in mine water based on a water quality sensor group; Step 602: dynamically adjust the pretreatment process and the dosage and treatment intensity of the pretreatment agent according to different physical, chemical and biological parameters in the mine water detected by the impurity component identification module; Step 603: Based on the pretreatment process output by the adaptive water quality treatment module, the dosage of the pretreatment agent and the treatment intensity, the mine water is filtered and output using a membrane separation component.

[0060] In an embodiment of the present invention, the coal mine water treatment method further includes: When the impurities in the produced water exceed the preset water quality threshold, several reverse osmosis membranes are connected in series; When the water production is less than the preset water production threshold, several reverse osmosis membranes are connected in parallel.

[0061] In an embodiment of the present invention, the coal mine water treatment method further includes: When the parameter change exceeds the preset trend alarm threshold, a blocking alarm is triggered; And / or, calculate the degree of parameter mutation within the standard time in real time. When the degree of parameter mutation within the standard time exceeds a preset mutation threshold, predict a fault based on the duration of the mutation and the amplitude of the mutation, and issue a blocking alarm when a fault is predicted.

[0062] The coal mine water treatment method provided by the embodiment of the present invention detects different physical, chemical and biological parameters in the mine water based on a water quality sensor group; dynamically adjusts the pretreatment process and the dosage and treatment intensity of the pretreatment agent according to the different physical, chemical and biological parameters in the mine water detected by the impurity component identification module; uses a membrane separation component to filter and output the mine water based on the pretreatment process and the dosage and treatment intensity of the pretreatment agent output by the adaptive water quality treatment module, and first analyzes the impurity components of the mine raw water at the front end of the water treatment and effectively identifies its water quality, providing targeted solutions for the subsequent treatment measures, so that different water qualities in different regions are treated and the treated water quality is consistent, thereby avoiding the blockage, corrosion and other effects of different water qualities in different regions on mining equipment, and performing targeted pretreatment according to the water quality analysis results to control the dosage and treatment intensity of each link, thereby reducing the scaling and blocking phenomenon on the surface of the reverse osmosis membrane and extending the service life of the reverse osmosis membrane.

[0063] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0064] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiment.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coal mine water treatment system, characterized in that: include: An impurity component identification module, wherein the impurity component identification module includes a water quality sensor group, and the impurity component identification module is used to detect different physical, chemical and biological parameters in the mine water based on the water quality sensor group; An adaptive water quality treatment module, used to dynamically adjust the pretreatment process and the amount of pretreatment reagents and the treatment intensity according to different physical, chemical and biological parameters in the mine water detected by the impurity component identification module; The water production module is used to filter and output the mine water using a membrane separation component based on the pretreatment process output by the adaptive water quality treatment module, the amount of pretreatment reagents added, and the treatment intensity.

2. The coal mine water treatment system according to claim 1, characterized in that: Also includes: The series-parallel switching module of the membrane separation component includes a valve controller and multiple series valves and parallel valves installed at the front and rear ends of each group of reverse osmosis membranes. The valve controller is used to control the switching states of the multiple series valves and parallel valves to switch the connection relationship between each group of reverse osmosis membranes to dynamically adjust the water production and filtration accuracy.

3. The coal mine water treatment system according to claim 1, characterized in that: The series-parallel switching module of the membrane separation assembly is also used for: When the impurities in the produced water exceed the preset water quality threshold, several reverse osmosis membranes are connected in series; When the water production is less than the preset water production threshold, several reverse osmosis membranes are connected in parallel.

4. The coal mine water treatment system according to claim 1, characterized in that: Also includes: A blockage degree monitoring module for a membrane separation component, wherein the blockage degree monitoring module for the membrane separation component comprises: A parameter change trend analysis unit, used to trigger a blocking alarm when the parameter change exceeds a preset trend alarm threshold; The mutation analysis unit is used to calculate the degree of parameter mutation within the standard time in real time. When the degree of parameter mutation within the standard time exceeds the preset mutation threshold, a fault prediction is performed based on the duration and amplitude of the mutation, and a blocking alarm is issued when a fault is predicted.

5. The coal mine water treatment system according to claim 4, characterized in that: The parameter change trend analysis unit is also used for: Real-time monitoring of the blocking parameters of the reverse osmosis membrane, wherein the blocking parameters include at least one of the inlet water pressure, the pressure difference between the two sides of the reverse osmosis membrane, the flow difference, the water production, the salt permeability, the water production conductivity and the membrane filtration time; Calculate the decrease ratio of each blocking parameter relative to the initial value, and classify the pollution degree according to the decrease ratio. If the decrease ratio is ≤5%, it is judged as slight pollution; 5%≤decrease ratio≤10%, it is judged as mild pollution; 10%≤decrease ratio≤20%, it is judged as moderate pollution; If the decrease rate is ≥20%, it is judged as severe pollution.

6. The coal mine water treatment system according to claim 1, characterized in that: The impurity component identification module also includes: A sampling component, the sampling component includes a sampling solenoid valve and a sampling pump; the sampling solenoid valve is used to control whether the mine water flows into the water quality sensor group; the sampling pump is used to provide power for the mine water to flow into the water quality sensor group; A rectifier component, the rectifier component includes a rectifier and a flow meter, the rectifier is used to rectify the incoming water flow; the flow meter is used to count the flow of mine water.

7. The coal mine water treatment system according to claim 1, characterized in that: The adaptive water quality treatment module is also used for: Determine the type of mine water according to different physical, chemical and biological parameters in the mine water detected by the impurity component identification module, wherein the mine water types include suspended matter mine water, highly mineralized mine water, acidic mine water and iron and manganese containing mine water; For mine water containing suspended matter, the dosage of polyaluminium chloride and polyacrylamide is adjusted dynamically, and a circulating flocculation and sedimentation process is adopted to adjust the flocculation reaction and sedimentation time according to the content of suspended matter in the water after real-time treatment; For high-mineralized mine water, according to the water hardness data, dynamically adjust the amount of chemical agents added to adjust the hardness, increase the contact area of ​​ion exchange softening, increase the electrodialysis voltage, increase the number of nanofiltration salt separations, and increase the number of reverse osmosis stages; if the back end is connected to a membrane desalination treatment unit, adjust the amount of scale inhibitor added according to the water hardness data; For acid mine water, increase the input of the continuous alkali production system, increase the aeration volume, increase the contact area of ​​the strong alkaline anion exchange resin, and monitor the effluent pH value in real time. If the effluent pH value exceeds the preset threshold, add acid to adjust the pH value to meet the effluent requirements; For mine water containing iron and manganese, we increase the contact oxidation medium and the oxygen content of the aeration device.

8. A method for treating coal mine water, characterized in that: A coal mine water treatment system applicable to any one of claims 1 to 7, comprising: Detection of different physical, chemical and biological parameters in mine water based on a water quality sensor cluster; Dynamically adjust the pretreatment process and the amount of pretreatment reagents and the treatment intensity according to different physical, chemical and biological parameters in the mine water detected by the impurity component identification module; Based on the pretreatment process output by the adaptive water quality treatment module, the dosage of the pretreatment agent and the treatment intensity, a membrane separation component is used to filter and output the mine water.

9. The method for treating coal mine water according to claim 8, characterized in that: Also includes: When the impurities in the produced water exceed the preset water quality threshold, several reverse osmosis membranes are connected in series; When the water production is less than the preset water production threshold, several reverse osmosis membranes are connected in parallel.

10. The method for treating coal mine water according to claim 8, characterized in that: Also includes: When the parameter change exceeds the preset trend alarm threshold, a blocking alarm is triggered; And / or, calculate the degree of parameter mutation within the standard time in real time. When the degree of parameter mutation within the standard time exceeds a preset mutation threshold, predict a fault based on the duration of the mutation and the amplitude of the mutation, and issue a blocking alarm when a fault is predicted.

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