CN215208753U - Nanofiltration device for mine water - Google Patents
Nanofiltration device for mine water Download PDFInfo
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- CN215208753U CN215208753U CN202023080168.8U CN202023080168U CN215208753U CN 215208753 U CN215208753 U CN 215208753U CN 202023080168 U CN202023080168 U CN 202023080168U CN 215208753 U CN215208753 U CN 215208753U
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Abstract
The utility model relates to a water purification field discloses a mine water is with device of receiving straining, including mine water collection unit, still include the pretreatment unit who is connected with mine water collection unit and is detached former aquatic suspended solid and colloid, pretreatment unit even has the ultrafiltration unit who gets rid of former aquatic fine suspended solid colloid and microorganism, and ultrafiltration unit even has the unit of receiving straining, and the purified water that the unit of receiving straining made gets into the retrieval and utilization pond, and the dense water that the unit of receiving straining produced gets into dense water processing unit. The utility model discloses pit is nanofiltration device for water when ensureing that system's product water quality of water reaches III class quality of water limits, improves the system utilization rate of water, and the energy consumption of the lowering system reduces the scale deposit risk of system, ensures the life of membrane.
Description
Technical Field
The utility model relates to a water purification field, concretely relates to mine water is with receiving filter equipment.
Background
China is a main coal producing country and a consuming country in the world, and is one of a few countries which take coal as main energy in the world. Coal is a basic energy source and an important raw material in China. The coal industry is an important basic industry related to national economic pulse and energy safety. Coal will be the main energy source for a long time in the primary energy structure of our country. A large amount of mine water generated in coal mining not only brings certain pressure to the ecological protection of a mining area, but also causes the waste of water resources.
At present, most of coal mine water is comprehensively utilized mainly as follows: the water for mining area production (coal washing, yellow mud grouting or boiler), greening and dust prevention, industrial supplementary water for enterprises around the mining area, irrigation water for farmland around the mining area, domestic water for residents, and unavailable water quality can be directly discharged to surrounding water bodies. At present, mine water in an inner Mongolia mining area presents high-mineralization mine water, wherein the mine water contains a large amount of Ca2+, Mg2+, SO42-, HCO3-, CO 32-and other ions, and the salt content of the mine water is as high as 2000-4000 Mg/L. After the turbidity is removed by adopting the traditional physical and chemical method, the water quality can only meet the use of coal washing and yellow mud grouting in the mining area production, and the water quality can not reach the water for boiler, greening and dust prevention in the mining area, the industrial supplementary water for enterprises around the mining area, the irrigation water for farmland around the mining area and the water quality requirement of domestic water of residents, and can not reach the discharge requirement (reaching the water quality limit value of the earth surface III) of environmental protection.
At present, for the comprehensive utilization of the mine water with high mineralization degree, a reverse osmosis desalination process is mostly adopted domestically or internationally, the reverse osmosis desalination process has the advantages that the quality of the discharged water is stable and can completely meet the requirements of discharge and reuse, but the reverse osmosis desalination process has the obvious defects of high required reverse osmosis pressure, high energy consumption, low recovery rate of a single-stage reverse osmosis system (difficult to stabilize to reach more than 80 percent) and higher risk of membrane fouling.
Under the circumstances of advocating energy conservation and environmental protection, saving the existing energy consumption, improving the energy-saving and environmental-protection efficiency and reducing unnecessary energy waste, a highly mineralized mine water treatment system with high recovery rate and low energy consumption is searched to ensure that the comprehensive resource utilization water quality of mine water can be utilized or meet the emission requirement, so that the recovery utilization rate of mine water is increased, the running energy consumption is reduced, and the risk of membrane fouling and blocking is reduced.
Disclosure of Invention
The utility model aims at providing a mine water is with receiving filter equipment to the not enough of above-mentioned technique, when guaranteeing that system's product water quality of water reaches III types of quality of water limits, improves the system utilization rate of water, and the energy consumption of reducing system, the scale deposit risk of reducing system ensures the life of membrane.
In order to realize the above-mentioned purpose, the utility model discloses a mine water is with receiving filter device, including mine water collection unit, still include with mine water collection unit connects the pretreatment unit who detaches former aquatic suspended solid colloid and colloid, pretreatment unit even has the ultrafiltration unit who gets rid of former aquatic slight suspended solid colloid and microorganism, ultrafiltration unit even has the unit of receiving filter, the purified water that the unit of receiving filter made gets into the retrieval and utilization pond, the dense water that the unit of receiving filter produced gets into dense water processing unit.
Preferably, a backflow device is arranged in the nanofiltration unit, the generated concentrated water flows back to a water inlet of the nanofiltration unit, and the recovery rate is calculated according to the quality and quantity of the mine water.
Preferably, the pretreatment unit is provided with a multi-media filter and an activated carbon filter in series.
Preferably, the ultrafiltration unit is provided with an ultrafiltration membrane.
Preferably, the nanofiltration unit comprises a nanofiltration membrane component, and further comprises a nanofiltration lift pump for lifting the water produced by the ultrafiltration unit to the nanofiltration unit, a security filter for protecting the nanofiltration membrane, and a nanofiltration booster pump for improving the water inlet pressure.
Preferably, the concentrated water treatment unit comprises a hardness removal device and a concentrated water reverse osmosis desalination device.
Preferably, the nanofiltration unit further comprises auxiliary equipment, wherein the auxiliary equipment comprises a dosing device and a chemical cleaning device.
Preferably, the nanofiltration unit further comprises an automatic control system for automatically controlling the nanofiltration unit by adopting a plc program.
Compared with the prior art, the utility model, have following advantage:
1. the method combines the salt separation technology of a nanofiltration membrane component, the high-efficiency hardness removal and antifouling blockage prevention technology and the hydrophilic PVDF ultrafiltration membrane separation technology to realize that the water produced by the high-salinity mine water advanced treatment system stably reaches the III-class water quality limit value of the surface water environmental quality standard (GB 3838-2002);
2. compared with a reverse osmosis desalination device, the nanofiltration desalination device has low operation pressure and higher desalination efficiency, and can pertinently remove divalent ions in water;
3. the internal reflux technology of the concentrated water is adopted, the concentrated water at the tail end is refluxed to the nanofiltration unit, the recovery rate of the system is improved, part of residual energy of the concentrated water is recovered, and the energy consumption of the system is reduced;
4. the system has low scaling risk and long service life of the membrane;
5. the coal mine water is treated by combining the traditional mine water treatment process and then is used as production and domestic water, underground water is reduced, underground water resources are saved, the natural balance of underground water and surface water in a mining area is protected, the pollution of high-salinity water to peripheral water is reduced, the risk of salinization of peripheral land is effectively prevented, the risk of peripheral desertification is reduced, water resources are greatly saved, and the research and development of project related technologies and the application of the project related technologies have huge requirements in the high-salinity mine water resource utilization market.
Drawings
Fig. 1 is a schematic structural diagram of the nanofiltration device for mine water of the utility model.
The components in the figures are numbered as follows:
the device comprises a mine water collecting unit 1, a pretreatment unit 2, an ultrafiltration unit 3, a nanofiltration unit 4, a reuse water pool 5 and a concentrated water treatment unit 6.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments.
As shown in fig. 1, the utility model discloses mine water is with nanofiltration device, including mine water collection unit 1, still include and be connected the pretreatment unit 2 of detaching former aquatic suspended solid colloid and colloid with mine water collection unit 1, pretreatment unit 2 even has the ultrafiltration unit 3 of getting rid of former aquatic fine suspended solid colloid and microorganism, ultrafiltration unit 3 even has nanofiltration unit 4, the purifying water that nanofiltration unit 4 made gets into reuse water pond 5, the dense water that nanofiltration unit 4 produced gets into dense water treatment unit 6, be equipped with reflux unit in the nanofiltration unit 4, the dense water that will produce flows back to nanofiltration unit 4's water inlet.
In addition, in this embodiment, pretreatment unit 2 is provided with a multimedia filter and an activated carbon filter connected in series, ultrafiltration unit 3 is provided with an ultrafiltration membrane, nanofiltration unit 4 includes a nanofiltration membrane module, a nanofiltration lift pump for lifting water produced by ultrafiltration unit 3 to nanofiltration unit 4, a security filter for protecting the nanofiltration membrane, and a nanofiltration booster pump for increasing water inlet pressure, nanofiltration unit 4 further includes auxiliary equipment, the auxiliary equipment includes a chemical feeding device and a chemical cleaning device, and nanofiltration unit 4 further includes an automatic control system for automatically controlling the nanofiltration unit by adopting a plc program. The concentrated water treatment unit 6 comprises a hardness removal device and a concentrated water reverse osmosis desalination device.
When the embodiment is used, the mine water quality is characterized in that: the mine water mainly comes from underground water, and is formed by a series of physical, chemical and biochemical reactions when the underground water is contacted with coal and rock stratums in the coal mining process. It contains a large amount of Ca2+、Mg2+、SO4 2-、HCO3 -、CO3 2-The high-salinity mine water (salt-containing mine water) has larger salt content by plasma, and most of the high-salinity mine water is neutral or slightly alkaline. According to the characteristics of the quality of the mine water with high mineralization degree and the combination of the traditional mine water treatment process, the nanofiltration unit 4 is used for replacing the traditional reverse osmosis device for the first time, and a scientific, reasonable and low-energy-consumption water treatment process flow is designed according to the characteristics of the nanofiltration membrane; according to the quality and quantity of the mine water, the recovery rate and the membrane flux of the nanofiltration unit 4 are designed to be proper; the operating pressure of the nanofiltration membrane system is reduced, the energy consumption is reduced, and the risk of membrane scaling is reduced.
During operation of the embodiment, mine water enters the pretreatment unit 2 through the raw water lift pump after coagulating sedimentation and hardness removal in the mine water collection unit 1, suspended matters and colloids in the water are removed, produced water enters the ultrafiltration unit 3 through the lift pump, fine suspended matter colloids and microorganisms in the water are further removed, produced water in the ultrafiltration unit 3 enters the nanofiltration unit 4 through the lift pump, the produced water enters the nanofiltration membrane component after being pressurized through the nanofiltration booster pump to be subjected to divalent ion separation, only monovalent ions, a small amount of divalent ions and small molecular substances can penetrate through the nanofiltration membrane component, and therefore in fresh water, mainly monovalent ions and small molecular substances are used as main materials, and most divalent ions and large molecular substances cannot penetrate through the membrane and are intercepted in concentrated water. The purified water prepared by the nanofiltration unit 4 enters a reuse water tank 5 and can be used for producing domestic water or directly discharged after on-line monitoring and reaching the standard. The nanofiltration concentrated water enters a concentrated water treatment unit 6 for further concentration treatment. The specific functions of each unit are as follows:
(1) pretreatment unit 2
The filter is composed of a multi-medium filter and an active carbon filter which are connected in series, and is mainly used for removing suspended matters and colloid in water, reducing the turbidity of inlet water and reducing the risk of fouling and blocking of an ultrafiltration membrane.
(2) Ultrafiltration unit 3
In the ultrafiltration membrane screening process, pressure difference on two sides of the membrane is used as a driving force, the ultrafiltration membrane is used as a filtering medium, a plurality of fine micropores densely distributed on the surface of the ultrafiltration membrane only allow water and small molecular substances to pass through to form permeate liquid when raw liquid flows through the surface of the membrane under certain pressure, suspended matter colloid and partial microorganisms are further removed by adopting an external pressure type ultrafiltration membrane in a cross flow filtering mode, and the water quality of inlet water of the nanofiltration unit 4 is ensured to prevent the nanofiltration membrane from being polluted and blocked.
(3) Nanofiltration unit 4
The operating principle of the nanofiltration unit 4 is that low-valent salt and small molecular substances permeate a nanofiltration membrane component under the action of pressure difference driving force, and a liquid-liquid separation method for intercepting large molecular substances is adopted, wherein the molecular weight interception range of the nanofiltration membrane component is 200-1000 MWCO, which is between ultrafiltration and reverse osmosis, and the nanofiltration membrane component is mainly applied to water treatment and concentration and purification of large molecular substances. The device mainly comprises the following parts:
1. a nanofiltration lift pump: lifting the ultrafiltration water to a nanofiltration unit 4;
2. a cartridge filter: suspended matters with the particle size of more than 5 microns are intercepted, and the nanofiltration membrane component is protected;
3. and (3) nanofiltration booster pump: the water inlet pressure is improved, so that macromolecular salt in water is intercepted under the action of the nanofiltration membrane component;
4. a nanofiltration membrane component: desalting under the action of pressure difference;
5. an automatic control system: the nanofiltration unit 4 is automatically controlled by adopting a plc program;
6. auxiliary equipment: mainly comprises a dosing device and a chemical cleaning device, and prevents the membrane from scaling.
(4) Concentrated water treatment unit 6
The method mainly comprises a hardness removal device and a concentrated water reverse osmosis desalination device, wherein concentrated water generated by nanofiltration is subjected to ion exchange by a sodium bed and a weak acid cation bed to remove divalent ions such as calcium, magnesium and the like and high-valence metal ions in the water, so that the hardness of the water is reduced to approach zero. The produced water enters into a concentrated water reverse osmosis desalination device for further concentration, and the recovery rate of the system is improved.
The main technical indexes of the implementation are as follows:
1. the quality of produced water stably reaches the III-class water quality limit requirement of the environmental quality standard of surface water (GB 3838-2002);
2. the recovery rate of the nanofiltration unit 4 reaches 85 percent;
3. the operation pressure is less than or equal to 1Mpa, and the power consumption per ton of treated water is less than 1 kw/h.
The utility model discloses a mine water nanofiltration device, through the method of combining the salt separation technology of nanofiltration membrane components, the high-efficiency hardness removal and antifouling blockage prevention, and the hydrophilic PVDF ultrafiltration membrane separation technology, realizes that the water produced by the hypersalinity mine water advanced treatment system stably reaches the III-class water quality limit value of the surface water environmental quality standard (GB 3838-2002); compared with a reverse osmosis desalination device, the nanofiltration desalination device has low operation pressure and higher desalination efficiency, and can pertinently remove divalent ions in water; the internal reflux technology of the concentrated water is adopted, the concentrated water at the tail end is refluxed to the nanofiltration unit, the recovery rate of the system is improved, part of residual energy of the concentrated water is recovered, and the energy consumption of the system is reduced; the system has low scaling risk and long service life of the membrane; the coal mine water is treated by combining the traditional mine water treatment process and then is used as production and domestic water, underground water is reduced, underground water resources are saved, the natural balance of underground water and surface water in a mining area is protected, the pollution of high-salinity water to peripheral water is reduced, the risk of salinization of peripheral land is effectively prevented, the risk of peripheral desertification is reduced, water resources are greatly saved, and the research and development of project related technologies and the application of the project related technologies have huge requirements in the high-salinity mine water resource utilization market.
Claims (7)
1. A nanofiltration device for mine water comprises a mine water collecting unit (1) and is characterized in that: the mine water collection device is characterized by further comprising a pretreatment unit (2) which is connected with the mine water collection unit (1) and used for removing suspended matters and colloids in raw water, the pretreatment unit (2) is connected with an ultrafiltration unit (3) used for removing fine suspended matter colloids and microorganisms in the raw water, the ultrafiltration unit (3) is connected with a nanofiltration unit (4), purified water prepared by the nanofiltration unit (4) enters a reuse water pool (5), concentrated water generated by the nanofiltration unit (4) enters a concentrated water treatment unit (6), a reflux device is arranged in the nanofiltration unit (4), and the generated concentrated water flows back to a water inlet of the nanofiltration unit (4).
2. The nanofiltration device for mine water according to claim 1, wherein: the pretreatment unit (2) is provided with a multi-media filter and an activated carbon filter which are connected in series.
3. The nanofiltration device for mine water according to claim 1, wherein: the ultrafiltration unit (3) is provided with an ultrafiltration membrane.
4. The nanofiltration device for mine water according to claim 1, wherein: the nanofiltration unit (4) comprises a nanofiltration membrane component, a nanofiltration lifting pump for lifting the water produced by the ultrafiltration unit (3) to the nanofiltration unit (4), a security filter for protecting the nanofiltration membrane and a nanofiltration booster pump for improving the water inlet pressure.
5. The nanofiltration device for mine water according to claim 1, wherein: the concentrated water treatment unit (6) comprises a hardness removal device and a concentrated water reverse osmosis desalination device.
6. The nanofiltration device for mine water according to claim 4, wherein: the nanofiltration unit (4) also comprises auxiliary equipment, and the auxiliary equipment comprises a dosing device and a chemical cleaning device.
7. The nanofiltration device for mine water according to claim 4, wherein: the nanofiltration unit (4) also comprises an automatic control system which adopts a plc program to automatically control the nanofiltration unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023080168.8U CN215208753U (en) | 2020-12-18 | 2020-12-18 | Nanofiltration device for mine water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023080168.8U CN215208753U (en) | 2020-12-18 | 2020-12-18 | Nanofiltration device for mine water |
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| CN215208753U true CN215208753U (en) | 2021-12-17 |
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Denomination of utility model: Nanofiltration device for mine water Effective date of registration: 20221111 Granted publication date: 20211217 Pledgee: Bank of China Limited Wuhan Jianghan sub branch Pledgor: WUHAN JIANGYANG ENVIRONMENTAL TECHNOLOGY STOCK Co.,Ltd. Registration number: Y2022420000364 |