CN110759507A - Method for purifying water in mine - Google Patents
Method for purifying water in mine Download PDFInfo
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- CN110759507A CN110759507A CN201911124757.0A CN201911124757A CN110759507A CN 110759507 A CN110759507 A CN 110759507A CN 201911124757 A CN201911124757 A CN 201911124757A CN 110759507 A CN110759507 A CN 110759507A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/03—Pressure
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a method for purifying water in a mine, which comprises the following steps: conveying raw water in a mine to a raw water tank; pressurizing the raw water tank by gas to enable raw water to enter the filter water tank after passing through the filter assembly; pressurizing the filter water tank by gas to enable the filtered water to enter the water purifying tank after passing through the RO reverse osmosis system; and pressurizing the purified water tank through gas to enable the purified water to enter a water consumption point after passing through the quantitative conveying system. When the monitoring parameters of the quantitative conveying system reach set values, the filtering water tank is pressurized by gas to enable filtered water to reversely pass through the filtering component, or the purified water tank is pressurized by gas to enable purified water to reversely pass through the filtering component. The invention does not adopt any motor type pressurizing equipment, overcomes the difference in industry, realizes the treatment of underground raw water into pure water, greatly reduces the cost and is convenient for popularization in the reconstruction of old mines.
Description
Technical Field
The invention relates to the field of water pollution treatment or water purification treatment in a mine, in particular to a method for water purification treatment in the mine.
Background
The quality of mine water is greatly different along with different mine distribution areas, and is mainly influenced by geological conditions, coal seam characteristics and coal mining processes. The main pollutants in the mine water are coal dust and rock dust which permeate into the water during the coal mining process to form higher suspended matters, so that the color of the water is black. Generally, suspended matter SS in mine water discharged to the ground is 70-400 mg/L, which means that the mine water has a certain precipitation effect in an underground sump, otherwise, the SS content in the discharged mine water is high.
Other water quality characteristics of the mine water mainly comprise the following points: 1. the degree of mineralization is high. The mine water mineralization is about 50% above 1000mg/L, and mainly contains sulfate and bicarbonate. The total hardness is more than 25 German degrees, and the proportion of the permanent hardness in the total hardness is much larger than that of the temporary hardness. 2. Part of mine water is acidic. The acidic mine water is distributed in a certain area, the pH value is generally 3.1-4.2, the pH value is gradually reduced along with the increase of the mining depth, and the iron content is gradually increased. And 3, the COD content is lower. The Chemical Oxygen Demand (COD) is higher than that of underground water, generally more than 10mg/L, mainly caused by coal dust and secondly caused by pollution caused by personnel and machinery in the mining process.
The existing mine water is mainly utilized in large mines, and is mainly used for underground fire-fighting water spraying, coal washing plant production supplementary water and the like after being treated. The utilization rate of a newly built mine and a national mine is far higher than that of an old mine and a local mine in the utilization of mine water. The reason is that a newly-built mine emphasizes environmental protection and implements three simultaneous systems, while an old mine has no new investment and is difficult to treat and utilize mine water. The scale of the local coal mine is small, the fund is short, and the attention on the utilization of mine water in the production is relatively paid.
The common underground waste water is pressurized by a water pump for treatment, in the industry, because dangerous gases such as gas and the like can appear in a mine at any time, the water pump and the motor which meet the highest requirement of explosion-proof level are used in the mine in a specified way, and in addition, an explosion-proof power cabinet is also needed for supplying power to the motor. This has brought enormous cost pressure on old mines or local coal mines where the use of water pumps to pressurize water downhole has essentially become a standard in the industry. This is disadvantageous for the improvement of equipment in old mines, which are capital-intensive, and thus causes environmental pollution of sewage.
In addition, the emulsion is a transmission medium of a coal mine hydraulic system and plays a blood role in the hydraulic system. The emulsion is formed by mixing emulsified oil with water in a certain proportion, and the emulsion not only has the transmission function of starting force, but also has the functions of lubrication, cooling, corrosion prevention and corrosion prevention. Therefore, the quality of the emulsion directly determines the failure rate of the fully-mechanized mining hydraulic equipment, and even the service life. A working face emulsion pump station is arranged on a stope of a traditional fully mechanized mining working face, and emulsion is prepared on site by utilizing mine dustproof water and emulsified oil and is conveyed to equipment through an emulsion pump and a pipeline. Because the mine dust-proof water quality is substantially or contains a large amount of suspended matters and impurities, if the mine dust-proof water is directly mixed with the emulsified oil and then used in a hydraulic system, the service life of a sealing part in the hydraulic system is reduced, and even the hydraulic components are damaged.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the method for treating the water in the mine, which does not adopt any motor type pressurizing equipment, overcomes the difference in industry, realizes the treatment of underground raw water into the purified water, greatly reduces the cost and is convenient for popularization in the reconstruction of old mines.
The present invention achieves the above-described object by the following technical means.
A method for purifying water in a mine comprises the following steps:
conveying raw water in a mine to a raw water tank;
pressurizing the raw water tank by gas to enable raw water to enter the filter water tank after passing through the filter assembly;
pressurizing the filter water tank by gas to enable the filtered water to enter the water purifying tank after passing through the RO reverse osmosis system;
and pressurizing the purified water tank through gas to enable the purified water to enter a water consumption point after passing through the quantitative conveying system.
Further, the method also comprises a reverse cleaning step, which comprises the following specific steps:
when the monitoring parameters of the quantitative conveying system reach set values, the filtering water tank is pressurized by gas to enable filtered water to reversely pass through the filtering component, or the purified water tank is pressurized by gas to enable purified water to reversely pass through the filtering component.
Further, the method also comprises a reverse cleaning step, which comprises the following specific steps:
when the flow value at the outlet of the quantitative conveying system reaches a set value and the pressure difference between the inlet and the outlet of the filtering assembly is 0.2-0.5 bar, the filtering water tank is pressurized by gas so that filtered water reversely passes through the filtering assembly;
when the flow value of the outlet of the quantitative conveying system reaches a set value and the pressure difference between the inlet and the outlet of the filtering assembly exceeds 0.5bar, the purified water reversely passes through the filtering assembly by pressurizing the purified water tank through gas.
Further, the outlet of the filtering component is communicated with the inlet of the filtering water tank, the outlet of the filtering water tank and the outlet of the purified water tank in parallel; pressurizing the filter water tank with gas to reverse the flow of filtered water through the filter assembly; the clean water tank is pressurized by gas to cause clean water to pass through the filter assembly in a reverse direction.
Further, the filter assembly comprises at least 2 ceramic filters in series; according to the raw water flow direction, the filtering precision of the ceramic filter is reduced.
Further, the filter assembly includes a first ceramic filter and a second ceramic filter; the first ceramic filter has a filtration accuracy of not higher than 20 micrometers, and the second ceramic filter has a filtration accuracy of not higher than 5 micrometers.
Furthermore, the inlet of the first ceramic filter, the outlet of the first ceramic filter and the outlet of the second ceramic filter are respectively provided with a pressure sensor, and the control system controls a plurality of valves on the pipeline according to the flow value of the outlet of the quantitative conveying system and the pressure value of the pressure sensors, so as to realize reverse cleaning.
Further, former water pitcher, drainage jar and cross the water purification jar and communicate the air supply respectively, air supply pressure range is: p is 0.8 to 1.2 bar.
Further, the purified water is mixed with the emulsified oil by pressurizing the purified water tank with gas for preparing an emulsion.
The invention has the beneficial effects that:
1. the method for treating the water in the mine can greatly save the engineering cost by replacing an explosion-proof pump and an explosion-proof power electric cabinet by the gas pressurization raw water tank, the water filtering tank and the water purifying tank. Although the improvement is different from the traditional practice in the industry, the improvement actually saves the cost of equipment and creates conditions for the reconstruction of old mine equipment.
2. The method for purifying water in the mine has the advantages of simple, reliable and advanced treatment process, low energy consumption, less investment and small occupied area. And new technology, new materials and new equipment are actively and cautiously adopted, and the engineering investment and the operating cost are reduced as much as possible under the condition of ensuring that the effluent reaches the standard.
3. The method for purifying water in the mine adopts safe and reliable process routes and design parameters to ensure the standard reaching of the treatment and the safety of investment. The current domestic mature advanced technology is adopted, so that the engineering investment is reduced as much as possible, the construction period is shortened, and the operating cost is reduced.
4. According to the method for treating the water in the mine, when the monitoring parameter of the quantitative conveying system reaches a set value, the effluent flow and the water quality are ensured through a reverse cleaning step.
5. According to the method for treating the water in the mine, the purified water and the emulsified oil are mixed by pressurizing the water passing purification tank through the gas to prepare the emulsion, so that the service life of a sealing element in a hydraulic system is prolonged.
Drawings
FIG. 1 is a schematic diagram of a method for water purification treatment in a mine.
FIG. 2 is a flow chart of the method for water purification treatment in a mine.
In the figure:
1-a raw water tank; 1-1-raw water inlet valve; 1-2-a first intake valve; 1-3-a first level gauge; 1-4-raw water tank liquid outlet valve; 2-a filter assembly; 2-1-a first ceramic filter; 2-2-a second ceramic filter; 3-a filtration water tank; 3-1-filtering water inlet valve; 3-2-a second intake valve; 3-3-a second liquid level meter; 3-4-a liquid outlet valve of the filter water tank; 3-5-backwashing valve of the filter water tank; 4-RO reverse osmosis system; 5-a water purification tank; 5-1-purified water inlet valve; 5-2-third inlet valve; 5-3-a third level gauge; 5-4-a liquid outlet valve of the water purification tank; 5-5-backwashing valve of water purifying tank.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
As shown in fig. 1 and 2, the method for purifying water in a mine disclosed by the invention mainly comprises the following treatment processes: raw water enters a raw water tank 1 and is directly pressurized by an air source and then enters a filtering component 2, filtered produced water enters a filtering water tank 3, the filtering water tank 3 pressurizes filtered water by the air source and then sends the pressurized filtered water to an RO (reverse osmosis) reverse osmosis system, the treated produced water enters a purified water tank, and the purified water is quantitatively conveyed to a rear-end water consumption point after being sterilized. And cleaning drainage and RO reverse osmosis discharge concentrated water are directly discharged into an underground wastewater storage pool.
With reference to specific embodiments: as shown in a schematic diagram of fig. 1, a raw water inlet valve 1-1 and a first air inlet valve 1-2 are arranged at the top of a raw water tank 1, and a first liquid level meter 1-3 is installed on a tank body of the raw water tank 1; the raw water tank is characterized in that a raw water tank liquid outlet valve 1-4 is arranged at the bottom of the raw water tank 1, and the raw water tank liquid outlet valve 1-4 is sequentially communicated with a first ceramic filter 2-1 and a second ceramic filter 2-2 which are connected in series through pipelines.
The top of the filter water tank 3 is provided with a filtered water inlet valve 3-1 and a second air inlet valve 3-2, and the tank body of the filter water tank 3 is provided with a second liquid level meter 3-3; the bottom of the filter water tank 3 is provided with a filter water tank liquid outlet valve 3-4, one branch of an outlet of the second ceramic filter 2-2 is communicated with the filtered water liquid inlet valve 3-1, the other branch of the outlet of the second ceramic filter 2-2 is communicated with the filter water tank liquid outlet valve 3-4, and a filter water tank backwashing valve 3-5 is arranged between the outlet of the second ceramic filter 2-2 and the filter water tank liquid outlet valve 3-4. The outlet of the second ceramic filter 2-2 is communicated with the RO reverse osmosis system 4 through a pipeline.
A purified water inlet valve 5-1 and a third air inlet valve 5-2 are arranged at the top of the purified water tank 5, and a third liquid level meter 5-3 is installed on the tank body of the purified water tank 5; the bottom of the water purification tank 5 is provided with a water purification tank liquid outlet valve 5-4, the outlet of the second ceramic filter 2-2 is communicated with the water purification tank liquid outlet valve 5-4, and a water purification tank backwashing valve 5-5 is arranged between the outlet of the second ceramic filter 2-2 and the water purification tank liquid outlet valve 5-4. And a liquid outlet valve 5-4 of the water purification tank conveys the purified water to a quantitative conveying system, and the purified water is quantitatively conveyed to a rear-end water consumption point after being disinfected.
The first air inlet valve 1-2, the second air inlet valve 3-2 and the third air inlet valve 5-2 are respectively connected with an air source, and an air compressor for generating the air source is generally positioned above a well.
The specific operation steps are as follows:
raw water enters a raw water tank 1 through a raw water inlet valve 1-1, the raw water in the raw water tank 1 is sequentially pressed into a first ceramic filter 2-1 and a second ceramic filter 2-2 through a first air inlet valve 1-2 for air inlet pressurization, then enters a filter water tank 3, and when a first liquid level meter 1-3 is lower than a set value, the first air inlet valve 1-2 is closed.
2 first ceramic filter 2-1 and second ceramic filter 2-2 connected in series, the filtering precision is reduced according to the raw water flow direction. The first ceramic filter 2-1 has a filtration accuracy of not higher than 20 μm, and the second ceramic filter 2-2 has a filtration accuracy of not higher than 5 μm.
The filter water tank 3 is pressurized by air intake through the second air intake valve 3-2, filtered water in the filter water tank 3 is pressed into the RO reverse osmosis system 4 and then enters the purified water tank 5, and when the second liquid level meter 3-3 is lower than a set value, the second air intake valve 3-2 is closed. When the flow value of the outlet of the quantitative conveying system reaches a set value and the pressure difference between the inlet and the outlet of the filter assembly 2 is 0.2-0.5 bar, the filtered water inlet valve 3-1 is closed, the backwashing valve 3-5 of the water filter tank is opened, the filtered water tank 3 is pressurized by air intake through the second air inlet valve 3-2, and filtered water in the water filter tank 3 is pressed into the outlet of the filter assembly 2 and is discharged through the inlet of the filter assembly 2. Generally, the pressure difference between the inlet and the outlet of the filtering component 2 is 0.2-0.5 bar, the filtering component 2 is slightly blocked in the specification, and automatic cleaning and drainage can be realized through filtered water backwashing.
The water purifying tank 5 is pressurized by air intake through the third air intake valve 5-2, purified water in the water purifying tank 5 is pressed into a quantitative conveying system, and the purified water is conveyed to a rear-end water consumption point quantitatively after being disinfected. And when the third liquid level meter 5-3 is lower than the set value, the third air inlet valve 5-2 is closed. When the flow value of the outlet of the quantitative conveying system reaches a set value and the pressure difference between the inlet and the outlet of the filter assembly 2 exceeds 0.5bar, a backwashing valve 5-5 of the water purification tank is opened, air is introduced through a third air inlet valve 5-2 to pressurize the water purification tank 5, and purified water in the water purification tank 5 is pressed into the outlet of the filter assembly 2 and is discharged through the inlet of the filter assembly 2. Generally, the pressure difference between the inlet and the outlet of the filter assembly 2 exceeds 0.5bar, and the filter assembly 2 is seriously blocked in the specification, so that the filter assembly cannot be backwashed by filtered water, and preferably, the filter assembly is backwashed by clean water to realize automatic cleaning and drainage.
In order to realize automatic cleaning control, pressure sensors are respectively arranged at the inlet of the first ceramic filter 2-1, the outlet of the first ceramic filter 2-1 and the outlet of the second ceramic filter 2-2, and the control system controls a plurality of valves on a pipeline according to the flow value of the outlet of the quantitative conveying system and the pressure value of the pressure sensors to realize reverse cleaning. Generally, the set value of the flow value at the outlet of the quantitative conveying system is related to the volume of the water purifying tank 5, the total volume of the water purifying tank 5 is 2000L, the rated volume is 1500L, and generally, when the water output from the rear end water consumption point reaches 5 times of the rated volume of the water purifying tank 5, back washing is needed.
The other main purpose of the invention is to convey the filtered clean water through air pressure to mix the clean water with emulsified oil for preparing emulsion. The prepared emulsion has low content of particles, and is beneficial to prolonging the service life of a sealing element in a hydraulic system.
In the invention, only all PLC control systems need to supply 24V weak current circuits underground, and the cost of the explosion-proof control electric cabinet is greatly reduced compared with that of an explosion-proof power cabinet. The daily treated water quantity is generally 70m3The power required by the control cabinet for/d is 1.1 KW. While the power of the power cabinet of the common explosion-proof pump needs at least 37 KW. Therefore, the invention replaces an explosion-proof pump and an explosion-proof power electric cabinet by the gas pressurization raw water tank, the water filtering tank and the water purifying tank, which can greatly save the engineering cost. Although the improvement is different from the traditional practice in the industry, the improvement actually saves the cost of equipment and is old mine equipmentThe condition is created by the reconstruction of the method.
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (9)
1. A method for treating water purification in a mine is characterized by comprising the following steps:
raw water in a mine is conveyed into a raw water tank (1);
the raw water tank (1) is pressurized by gas, so that raw water enters the filter water tank (3) after passing through the filter assembly (2);
pressurizing the filter water tank (3) by gas, so that filtered water enters the purified water tank (5) after passing through the RO reverse osmosis system (4);
the purified water passes through the quantitative conveying system and then enters a water consumption point by pressurizing the purified water tank (5) through gas.
2. The method for purifying water in a mine shaft according to claim 1, further comprising a reverse cleaning step, specifically as follows:
when the monitoring parameters of the quantitative conveying system reach set values, filtered water reversely passes through the filtering component (2) by pressurizing the filtering water tank (3) through gas, or purified water reversely passes through the filtering component (2) by pressurizing the purified water tank (5) through gas.
3. The method for purifying water in a mine shaft according to claim 2, further comprising a reverse cleaning step, specifically as follows:
when the flow value of the outlet of the quantitative conveying system reaches a set value and the pressure difference between the inlet and the outlet of the filter assembly (2) is 0.2-0.5 bar, the filter water tank (3) is pressurized by gas to enable filtered water to reversely pass through the filter assembly (2);
when the flow value of the outlet of the quantitative conveying system reaches a set value and the pressure difference between the inlet and the outlet of the filter assembly (2) exceeds 0.5bar, the purified water passes through the filter assembly (2) reversely by pressurizing the purified water tank (5) through gas.
4. A mine water purification method according to claim 3, wherein the outlet of the filter assembly (2) is connected in parallel with the inlet of the filter water tank (3), the outlet of the filter water tank (3) and the outlet of the water purification tank (5); -pressurizing the filtration water tank (3) by means of gas, causing the filtered water to pass through the filtration module (2) in reverse; the purified water is passed through the filter assembly (2) in reverse direction by pressurizing the purified water tank (5) with gas.
5. The method for purifying water in a mine shaft according to any one of claims 1 to 4, wherein the filter assembly (2) comprises at least 2 ceramic filters (2-1, 2-2) connected in series; the filtering accuracy of the ceramic filters (2-1, 2-2) is reduced according to the flow direction of raw water.
6. The method for purifying water in a mine shaft according to claim 5, wherein the filter assembly (2) comprises a first ceramic filter (2-1) and a second ceramic filter (2-2); the first ceramic filter (2-1) has a filtration accuracy of not higher than 20 μm, and the second ceramic filter (2-2) has a filtration accuracy of not higher than 5 μm.
7. The method for purifying water in the mine shaft according to claim 6, wherein the inlet of the first ceramic filter (2-1), the outlet of the first ceramic filter (2-1) and the outlet of the second ceramic filter (2-2) are respectively provided with a pressure sensor, and a control system controls a plurality of valves on a pipeline according to the flow value of the outlet of the quantitative conveying system and the pressure value of the pressure sensor so as to realize reverse cleaning.
8. The mine water purification treatment method according to claim 1, wherein the raw water tank (1), the water filtration tank (3) and the purified water tank (5) are respectively communicated with air sources, and the pressure ranges of the air sources are as follows: p is 0.8 to 1.2 bar.
9. The method for purifying water in a mine shaft according to claim 1, wherein the purified water is mixed with emulsified oil by pressurizing the purified water tank (5) with gas for preparing emulsion.
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| CN201911124757.0A CN110759507A (en) | 2019-11-18 | 2019-11-18 | Method for purifying water in mine |
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| CN201911124757.0A CN110759507A (en) | 2019-11-18 | 2019-11-18 | Method for purifying water in mine |
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| CN101798128A (en) * | 2010-04-10 | 2010-08-11 | 龙口煤电有限公司 | Underground movable reverse osmosis water treating equipment and treating process thereof for coal mine |
| CN202724806U (en) * | 2012-08-03 | 2013-02-13 | 自贡东方过滤设备制造有限公司 | Backwash water strainer |
| CN103030237A (en) * | 2012-12-29 | 2013-04-10 | 上海安赐机械设备有限公司 | Treatment device and treatment method for recycling coal slurry sewage |
| CN203878003U (en) * | 2014-06-16 | 2014-10-15 | 河南锦源环保科技有限公司 | Reverse osmosis membrane underground purification equipment |
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Application publication date: 20200207 |