CN113754142A - Coal mine underground water softening method and device - Google Patents
Coal mine underground water softening method and device Download PDFInfo
- Publication number
- CN113754142A CN113754142A CN202111037713.1A CN202111037713A CN113754142A CN 113754142 A CN113754142 A CN 113754142A CN 202111037713 A CN202111037713 A CN 202111037713A CN 113754142 A CN113754142 A CN 113754142A
- Authority
- CN
- China
- Prior art keywords
- water
- ion exchange
- electric valve
- mine
- exchange column
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 317
- 239000003245 coal Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005342 ion exchange Methods 0.000 claims abstract description 207
- 238000010612 desalination reaction Methods 0.000 claims abstract description 16
- 239000003814 drug Substances 0.000 claims abstract description 15
- 238000005192 partition Methods 0.000 claims abstract description 11
- 239000003011 anion exchange membrane Substances 0.000 claims abstract description 9
- 239000002817 coal dust Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 8
- 239000013049 sediment Substances 0.000 claims abstract description 6
- 239000000701 coagulant Substances 0.000 claims abstract description 5
- 230000001112 coagulating effect Effects 0.000 claims abstract description 4
- 238000004062 sedimentation Methods 0.000 claims abstract description 4
- 239000011347 resin Substances 0.000 claims description 37
- 229920005989 resin Polymers 0.000 claims description 37
- 239000003456 ion exchange resin Substances 0.000 claims description 28
- 229920003303 ion-exchange polymer Polymers 0.000 claims description 28
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims description 25
- 239000013505 freshwater Substances 0.000 claims description 19
- 239000012528 membrane Substances 0.000 claims description 19
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 18
- 150000002500 ions Chemical class 0.000 claims description 16
- 230000008929 regeneration Effects 0.000 claims description 16
- 238000011069 regeneration method Methods 0.000 claims description 16
- 238000000926 separation method Methods 0.000 claims description 15
- 150000001768 cations Chemical class 0.000 claims description 14
- 239000011780 sodium chloride Substances 0.000 claims description 13
- 150000001450 anions Chemical class 0.000 claims description 11
- 238000005341 cation exchange Methods 0.000 claims description 10
- 238000002474 experimental method Methods 0.000 claims description 10
- 238000011033 desalting Methods 0.000 claims description 8
- 239000002244 precipitate Substances 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 7
- 239000003014 ion exchange membrane Substances 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 6
- 239000012267 brine Substances 0.000 claims description 5
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 238000000909 electrodialysis Methods 0.000 claims description 4
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 239000010405 anode material Substances 0.000 claims description 3
- 239000010406 cathode material Substances 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 3
- 229910052707 ruthenium Inorganic materials 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000003010 cation ion exchange membrane Substances 0.000 claims 2
- 238000000429 assembly Methods 0.000 claims 1
- 230000000712 assembly Effects 0.000 claims 1
- 125000002091 cationic group Chemical group 0.000 claims 1
- 230000000694 effects Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000005349 anion exchange Methods 0.000 description 4
- 229910001424 calcium ion Inorganic materials 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 2
- 239000005442 atmospheric precipitation Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000000502 dialysis Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 229910001425 magnesium ion Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012811 non-conductive material Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003729 cation exchange resin Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000002345 surface coating layer Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
-
- 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
-
- 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
- C02F2209/05—Conductivity or salinity
- C02F2209/055—Hardness
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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
- C02F2303/14—Maintenance of water treatment installations
-
- 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
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
Landscapes
- Life Sciences & Earth Sciences (AREA)
- 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)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a coal mine underground water softening method and a device, wherein a pretreatment tank is arranged at a main water inlet, a PAC coagulant is filled in the pretreatment tank and used for removing suspended matters such as coal dust with larger particle size in mine water, and after the mine water is subjected to coagulating sedimentation treatment, sediments are discharged from a sediment discharge port for subsequent treatment; the pretreated mine water flows into an ion exchange column, and after the mine water is subjected to hardness removal by the ion exchange column, the mine water is discharged into an electrodialyzer for desalination; the electrodialyzer is characterized in that a plurality of cation-anion exchange membranes are arranged between a positive electrode and a negative electrode in a staggered mode and are separated by a partition plate, so that two systems of desalination and concentration are formed. The invention is provided with the electric valve group, the three ion exchange columns and the medicament adding device, and the three ion exchange columns can be connected in series and in parallel by controlling the opening and closing of the electric valve group, so that the softening depth and efficiency of mine water are improved.
Description
Technical Field
The invention relates to a method and a device for softening underground water of a coal mine, belonging to the technical field of softening of mine water.
Background
The mine water is water formed by atmospheric precipitation, surface water, underground water, domestic water and the like which are poured into a mine in the development process of a coal mine. The method is mainly characterized in that the original endowment state of underground water is destroyed and cracks are generated in the process of mining the ore deposit, the hydraulic connection among all aquifers is closely contacted, and various water permeates into an underground mining space along the original and new cracks through atmospheric precipitation and surface water permeation and supply. The mine water is the wastewater with the largest discharge amount in the coal production process, but the utilization efficiency of the mine water under the coal mine is low, and the use of the untreated mine water can easily cause scaling blockage and pipeline corrosion of underground pipelines, so that the cost of the underground coal mine mining work is influenced, and the safety of the underground coal mine mining work is reduced. In addition, the discharge of a large amount of mine water not only causes the mine water resource waste, but also influences the surrounding environment of the coal mine.
The prior art for softening mine water mainly comprises a medicament softening method, an ion exchange method and a membrane separation technology. The medicament softening method can only roughly remove coal dust and suspended matters with larger particle sizes in the mine water, and can not realize deep removal of hardness ions; the ion exchange method has mature process, high removal rate, large treatment capacity and stable treatment effect, and has the main defects that the ion exchange resin needs to be regenerated after being used, a large amount of chemical reagents are needed in the regeneration process, and the regeneration process is relatively complicated; the widely applied technique in the membrane separation technology is electrodialysis, which is a combination of electrolysis and dialysis diffusion, and utilizes the selective permeability of an ion exchange membrane, namely, an anode membrane theoretically only allows cations to pass through, a cathode membrane theoretically only allows anions to pass through, and the anions and the cations move towards an anode and a cathode respectively under the action of an external direct current electric field. If the fixed charge of the membrane is opposite to the charge of the ions, the ions can pass through, and if their charges are the same, the ions are repelled, so that fresh water can be produced.
Disclosure of Invention
The invention aims to provide a coal mine underground water softening method and a coal mine underground water softening device, which have the characteristics of obvious softening effect and diversified use modes.
The pretreatment pool, the ion exchange column and the electrodialyzer respectively utilize the principles of a medicament softening method, an ion exchange technology and a membrane softening method to treat suspended matters, hardness ions and salt content in mine water. The pre-treatment tank is filled with polyaluminium chloride (PAC), the coagulant has strong interface adsorption capacity and can form surface precipitate under the conditions of high concentration and high pH, the surface coating layer can be converted from polyaluminium into aluminium gel or aluminium hydroxide precipitate, at the moment, the coagulation effect is mainly converted into flocculation effect, and the electric neutralization effect is mainly converted into adhesion scroll. When the mine water flows to the ion exchange column, hardness ions (mainly calcium ions and magnesium ions) in the mine water and the ion exchange resin are subjected to ion exchange reaction, so that the mine water is softened. Ion exchange resins characterised by Na+And H+Ion exchange resin, the ion exchange reaction is shown as follows:
Na+type (2):
H+type (2):
in the solution with low concentration at normal temperature, due to Ca2＋(or Mg)2+) Has stronger affinity with cation exchange resin, the reaction proceeds to the right, H in the resin+(or Na)+) Is continuously covered with Ca2＋(or Mg)2+) Displacing until the reaction is balanced; when H is in solution+(or Na)+) The concentration is relatively high (such as resin in HCl solution or saturated saline solution)) When the reaction is carried out to the left, the Ca in the resin is2+(or Mg)2+) The continuous desorption enables the ion exchange resin to be regenerated, which is the function and the regeneration process of the ion exchange resin. After ion exchange, most of the hardness ions in the mine water are removed, but metal ions (such as Fe) remain3+) And sulfate ions and the like, and desalting the mine water by the concentration difference dialysis principle of an electrodialyzer. By utilizing the selective permeability of the ion exchange membrane, namely the positive membrane theoretically only allows cations to pass through, the negative membrane theoretically only allows anions to pass through, and the anions and the cations move to the anode and the cathode respectively under the action of an external direct current electric field. If the fixed charge of the membrane is opposite to the charge of the ions, the ions can pass through, and if their charges are the same, the ions are repelled, so that fresh water can be produced.
The invention applies the medicament softening method to the pretreatment of the mine water, and the ion exchange column and the electrodialyzer are arranged subsequently, so that the working capacity of the system is improved and the softening mode is diversified by the combined use of a plurality of electronic valves.
The invention provides a coal mine underground water softening method, wherein a pretreatment tank is arranged at a main water inlet, a PAC coagulant is filled in the pretreatment tank and used for removing suspended matters such as coal dust with larger particle size in mine water, and precipitates of the mine water after coagulating sedimentation treatment are discharged from a precipitate outlet for subsequent treatment. And (3) enabling the pretreated mine water to flow into an ion exchange column, removing hardness of the mine water by adopting the ion exchange column, and then discharging the mine water into an electrodialyzer for desalting treatment. The electrodialyzer is a fastening electrodialyzer, which comprises anion and cation exchange membranes, a partition board and a positive and negative electrode assembly, wherein a plurality of anion and cation exchange membranes are arranged between the positive and negative electrodes in a staggered manner and are separated by the partition board to form two desalting and concentrating systems.
When mine water flows through the ion exchange column, the rotation of the ion exchange column is adjusted according to the hardness of the mine water, and the rotation speed range of the ion exchange column is as follows: 10 r/min-100 r/min, and the total hardness range of the mine water is generally 100 mg/L-700 mg/L. When high-hardness mine water is treated, the contact time of the ion exchange resin and the mine water is longer, and the rotating speed of the ion exchange column can be reduced; when the low-hardness mine water is treated, the rotation speed of the ion exchange column can be accelerated, the contact time of the resin and the mine water is shortened, and the treatment speed is accelerated.
The clapboard is arranged between the anion exchange membrane and the cation exchange membrane, plays the role of separating and supporting the anion exchange membrane and the cation exchange membrane, forms a water flow channel to form a dense chamber and a dilute chamber which are distributed in a staggered way, and is provided with a water inlet and outlet hole, a water distribution tank, a water collection tank, a water flowing channel and a water passing channel. The separator is usually used in combination with a screen, which uses a non-conductive material, is acid-and corrosion-resistant, dimensionally stable and has a certain elasticity, and the separator material used in the electrodialyser is soft polyvinyl chloride. The thickness range of the clapboard is 0.5 mm-2 mm, and the thin clapboard is used as much as possible on the premise of not influencing the performance. The partition plate is often used together with a separation net in a matching and sticking mode, and the separation net has a stirring effect and increases the turbulence degree of mine water. The separation net is an ion exchange conductive net, and ion exchange active groups are arranged on the separation net, so that the separation net has ion exchange capacity. After the saline water is introduced into the compartment, under the action of a direct current power supply, cations migrate to the cathode, and anions migrate to the anode, so that the saline water in the dilute chamber is desalted and the saline water in the concentrated chamber is concentrated due to the selective permeability of the ion exchange membrane, and the desalting purpose is realized.
Regarding the selection of the ion exchange columns, when the mine water with low hardness is treated, 001 x 7 type cation resin can be put into all three ion exchange columns, and a single-stage ion exchange process is adopted; when high-hardness mine water is treated, 001 × 7 type cation resin can be put into the first ion exchange column, D61 type resin can be put into the second ion exchange column, and a two-stage series ion exchange process of 001 × 7 and D61 resins is adopted, so that different resins can be filled or combined according to actual requirements in other cases.
The electrodes are arranged at two ends of the electrodialyzer and connected with a direct current power supply, the cathode material is stainless steel, and the anode material is titanium-coated ruthenium.
The rotation speed of the ion exchange column is set according to the mine water concentration, and the rotation speed range of the ion exchange column is as follows: 10 r/min-100 r/min, the total hardness range of the mine water is generally 100 mg/L-700 mg/L, and the rotating speed of the ion exchange column can be set according to the hardness condition of the treated mine water. When the water quality detector detects that the hardness of the outlet water of the ion exchange column is increased and exceeds the range (150 mg/L), closing electric valves on a water inlet pipeline and a water outlet pipeline, stopping working, using a standby ion exchange column to continue working, then opening a medicament adding device, adding 10% NaCl solution into the ion exchange column for resin regeneration, and setting the rotation speed of the ion exchange column to be 50r/min so as to efficiently regenerate the ion exchange resin. Finally, the mine water treated by the ion exchange column flows into an electrodialyzer to complete desalination and concentration in the electrodialyzer to generate fresh water.
The working condition I is as follows: when the three ion exchange columns are used independently, a first ion exchange column of the ion exchange columns is in a working state, the mine water flowing out of the pretreatment tank is softened, the other two ion exchangers are in a standby state, the first electric valve, the second electric valve and the seventh electric valve are opened, the third electric valve, the fourth electric valve, the fifth electric valve, the sixth electric valve, the eighth electric valve and the ninth electric valve are closed, the inflow water of the electrodialyzer sequentially flows through the first electric valve, the second electric valve, the first ion exchange column and the seventh electric valve, the fresh water flows into each water-using device in the well from the total water outlet after desalination and concentration treatment, the residual concentrated water flows out from the concentrated water outlet, and the residual concentrated water is treated subsequently; when the water quality detector detects that the hardness of mine water exceeds a specified range, stopping using the first ion exchange column, performing a regeneration experiment on ion exchange resin in the first ion exchange column, replacing the mine water with a second ion exchange column, opening the first electric valve, the third electric valve and the eighth electric valve, closing the second electric valve, the fourth electric valve, the fifth electric valve, the sixth electric valve, the seventh electric valve and the ninth electric valve, enabling inlet water of the electrodialyzer to sequentially flow through the first electric valve, the third electric valve, the second ion exchange column and the eighth electric valve, enabling the inlet water to flow into the electrodialyzer to be subjected to desalination and concentration treatment, enabling fresh water to flow from a main water outlet to underground water-using equipment, enabling residual concentrated water to flow from a concentrated water outlet, and subsequently treating the residual concentrated water; when the water quality detector detects that the hardness of mine water exceeds a specified range, the second ion exchange column is stopped to be used, the ion exchange resin in the second ion exchange column is subjected to a regeneration experiment, the third ion exchange column is used for replacing work, the first electric valve, the fourth electric valve and the ninth electric valve are opened, the second electric valve, the third electric valve, the fifth electric valve, the sixth electric valve, the seventh electric valve and the eighth electric valve are closed, the inlet water of the electrodialyzer sequentially flows through the first electric valve, the fourth electric valve, the third ion exchange column and the ninth electric valve, the inlet water of the electrodialyzer flows into the electrodialyzer to be desalted and concentrated, the fresh water flows into all underground water utilization equipment from a main water outlet, the residual concentrated water flows out from a concentrated water outlet, and the residual concentrated water is subsequently treated. And when the water quality detector detects that the hardness of the mine water exceeds the specified range, stopping using the third ion exchange column, performing a regeneration experiment on the ion exchange resin in the third ion exchange column, and repeating the steps to continuously soften the ion exchange resin.
Working conditions are as follows: when the requirement for softening mine water is high, three ion exchange columns are connected in series for use, 001 x 7, D61 and 732 resins are sequentially filled into the first ion exchange column and the third ion exchange column, the ion exchange capacity of the three resins is sequentially enhanced, and hard ions in the mine water can be gradually removed. The mine water sequentially flows through the three ion exchange columns, the first electric valve, the second electric valve, the fifth electric valve, the sixth electric valve and the seventh electric valve are opened, and the third electric valve, the fourth electric valve, the eighth electric valve and the ninth electric valve are closed. After ion exchange, mine water flows into the water inlet of the electrodialyzer.
Working conditions are as follows: when the three ion exchangers are used in parallel, the three ion exchange columns are all in a working state, the first electric valve, the second electric valve, the third electric valve, the fourth electric valve, the seventh electric valve, the eighth electric valve and the ninth electric valve are opened, the fifth electric valve and the sixth electric valve are closed, mine water simultaneously enters the three ion exchange columns, flows into the electrodialyzer after ion exchange treatment, fresh water flows out of the main water outlet after electrodialysis desalination treatment, and concentrated water flows out of the concentrated water discharge outlet and is subsequently treated.
The invention provides a coal mine underground water softening device, which mainly comprises three parts: the pretreatment tank, the three ion exchange columns and the electrodialyzer are connected by a plurality of electric valves and pipelines, wherein the electric valves comprise a first electric valve to a ninth electric valve, and the first electric valve controls the water inlet of the whole softening system; the second, third and fourth valves control the water inlet of the first, second and third ion exchange columns respectively; the seventh, eighth and ninth electrically operated valves control the water outlet of the first, second and third ion exchange columns respectively; the fifth electric valve is connected with the first ion exchange column and the second ion exchange column, and the sixth electric valve is connected with the second ion exchange column and the third ion exchange column. The electric valve controller controls the first electric valve to the ninth electric valve, and the electric valve controller can independently control the opening and closing of any one electric valve, so that the opening and closing states of the electric valves are not influenced.
A main water inlet is arranged on a pipeline connected with the pretreatment tank; a water pump is arranged on a pipeline of the main water inlet to pump the mine water into a pretreatment tank, the pretreatment tank is used for filtering suspended matters such as coal dust with larger particle size in the mine water, and the upper part, the side surface and the bottom of the pretreatment tank are respectively provided with a mine water inlet, a mine water outlet and a precipitate outlet;
in the above system, the ion exchange columns include a first ion exchange column, a second ion exchange column and a third ion exchange column, and each ion exchange column may contain a 001 × 7 sodium type ion exchange resin. When high-hardness mine water is treated, the resin in the second ion exchange column can be replaced by D61 resin, and a two-stage series ion exchange process flow of 001 × 7 and D61 resins is adopted; when the mine water with low hardness is treated, a single-stage ion exchange process of 001 x 7 resin is adopted. In the face of other conditions, different types of ion exchange resins can be filled according to actual requirements, the ion exchange column has a rotating function, and the rotating speed of the ion exchange column is controlled by a controller;
in the system, a water quality detector is arranged in the system and is used for detecting the hardness of the mine water treated by the ion exchange column;
in the system, a plurality of electric valves and electric valve controllers are arranged in the system, and the opening and closing of each electric valve can be independently controlled through the electric valve controllers;
in the system, the electrodialyzer is provided with a concentrated brine discharge port for discharging concentrated brine left after mine water is softened, a main water outlet is connected with underground water utilization equipment of a coal mine, and fresh water flows out of the main water outlet and is used for underground dust fall and fire prevention and extinguishing.
In the system, the ion exchange column is connected with a medicament feeding device through a pipeline, and a controller is arranged to control the medicament feeding speed;
the system is provided with a direct current power supply for supplying power to all the electric equipment.
The invention has the beneficial effects that:
(1) the invention realizes the diversification of softening modes by combining the electric valve group and the controller and utilizing the combined use of the three ion exchange columns, thereby not only optimizing the mine water softening effect, but also widening the application range.
(2) The invention can run alternatively by arranging three ion exchange columns, thoroughly remove calcium and magnesium ions in the water inlet of the electrodialyzer, and can quickly switch the standby ion exchange columns when a fault occurs or a regeneration experiment is carried out, thereby greatly saving the working time.
(3) The invention realizes the desalination of the mine water by arranging the electrodialyzer according to the selective permeability of an ion exchange membrane in the electrodialyzer. The electrodialyser is generally controlled to operate under a constant direct current voltage, and the change of water quality and temperature is not required to be adapted by frequently adjusting the flow rate, the current and the voltage. Therefore, the mechanical and automatic operation is easy. And when the electrodialyzer runs, concentrated water and polar water can be recycled, the utilization rate of water is higher, the waste water amount is less, and the reutilization and the aftertreatment are simpler, so that the environmental pollution can be reduced while the high-efficiency softening is ensured.
Drawings
FIG. 1 is a schematic view of a coal mine downhole water softening system;
FIG. 2 is a schematic diagram of a parallel operation of a coal mine underground water softening system, corresponding to a third working condition;
FIG. 3 is a schematic diagram of the operation of mine water sequentially flowing through three ion exchange columns, and a treatment mode corresponding to a second working condition;
FIG. 4 is a schematic diagram of the operation of the first ion exchange column alone, corresponding to the treatment mode of the first operating condition;
FIG. 5 is a schematic diagram of the operation of the second ion exchange column alone; a processing mode corresponding to the working condition I;
FIG. 6 is a schematic diagram of the operation of the third ion exchange column alone; a processing mode corresponding to the working condition I;
FIG. 7 is a schematic diagram of the operation of an electrodialyzer.
In the figure: 1. a main water inlet; 2. a direct current power supply; 3. a water pump; 4. a pretreatment tank; 41. a mine water inlet; 42. a mine water outlet; 43. a sediment discharge port; 51. an electrically operated valve controller; 52. a resin rotational speed controller; 61. a first electrically operated valve; 62. a second electrically operated valve; 63. a third electrically operated valve; 64. a fourth electrically operated valve; 65. a fifth electrically operated valve; 66. a sixth electrically operated valve; 67. a seventh electrically operated valve; 68. an eighth electrically operated valve; 69. a ninth electrically operated valve; 71. a first ion exchange column; 72. a second ion exchange column; 73. a third ion exchange column; 81. a first water quality detector; 82. a second water quality detector; 83. a third water quality detector; 9. a medicament adding device; 10. the electrodialyzer water inlet; 11. a main water outlet; 12. an electrodialyzer; 13 concentrated water outlet.
Detailed Description
The present invention is further illustrated by, but is not limited to, the following examples.
Example 1:
as shown in FIGS. 1 to 7, a coal mine underground water softening device mainly comprises three parts: the pretreatment tank 4, three ion exchange columns and an electrodialyzer 12 are connected by a plurality of electric valves and pipelines, wherein the electric valves comprise a first electric valve to a ninth electric valve, and the first electric valve 61 controls the water inlet of the whole softening system; the second electric valve 62, the third electric valve 63 and the fourth electric valve 64 respectively control the water inlet of the first ion exchange column 71, the second ion exchange column 72 and the third ion exchange column 73; the seventh electric valve 67, the eighth electric valve 68 and the ninth electric valve 69 respectively control the water outlet of the first ion exchange column 71, the second ion exchange column 72 and the third ion exchange column 73; the fifth electrically operated valve 65 is connected to the first ion exchange column 71 and the second ion exchange column 72, and the sixth electrically operated valve 66 is connected to the second ion exchange column 72 and the third ion exchange column 73. The electric valve controller 51 controls the first to ninth electric valves, and the electric valve controller 51 can independently control the opening and closing of any one of the electric valves, so that the opening and closing states of the electric valves are not affected.
A main water inlet 1 is arranged on a pipeline connected with the pretreatment tank 4; a water pump 3 is arranged on a pipeline of the main water inlet 1, mine water is pumped into a pretreatment tank 4, the pretreatment tank is used for filtering suspended matters such as coal dust with larger particle size in the mine water, and the upper part, the side surface and the bottom of the pretreatment tank 4 are respectively provided with a mine water inlet 41, a mine water outlet 42 and a sediment outlet 43;
in the above system, the ion exchange columns include a first ion exchange column 71, a second ion exchange column 72 and a third ion exchange column 73, each of which may contain a 001 × 7 sodium type ion exchange resin. When high-hardness mine water is treated, the resin in the second ion exchange column can be replaced by D61 resin, and a two-stage series ion exchange process flow of 001 × 7 and D61 resins is adopted; when the mine water with low hardness is treated, a single-stage ion exchange process of 001 x 7 resin is adopted. In the face of other conditions, different types of ion exchange resins can be filled according to actual requirements, the ion exchange column has a rotating function, and the rotating speed of the ion exchange column is controlled by a controller;
in the system, a water quality detector is arranged in the system and is used for detecting the hardness of the mine water treated by the ion exchange column;
in the system, a plurality of electric valves and electric valve controllers are arranged in the system, and the opening and closing of each electric valve can be independently controlled through the electric valve controllers;
in the system, a concentrated brine discharge port 13 is arranged on the electrodialyzer to discharge concentrated brine left after mine water is softened, a main water outlet 1 is connected with underground water utilization equipment of a coal mine, and fresh water flows out from the main water outlet 1 and is used for underground dust fall and fire prevention and extinguishing.
In the system, the ion exchange column is connected with a medicament adding device 9 through a pipeline, and a controller is arranged to control the medicament adding speed;
the system is provided with a direct current power supply 2 for supplying power to all the electric devices.
The invention provides a method for softening water in a coal mine by adopting the system, which is characterized in that a pretreatment tank is arranged at a main water inlet, a PAC coagulant is filled in the pretreatment tank and used for removing suspended matters such as coal dust with larger particle size in the coal mine water, and precipitates of the coal mine water after coagulating sedimentation treatment are discharged from a precipitate outlet for subsequent treatment. And (3) enabling the pretreated mine water to flow into an ion exchange column, removing hardness of the mine water by adopting the ion exchange column, and then discharging the mine water into an electrodialyzer for desalting treatment. The electrodialyzer is a fastening electrodialyzer, which comprises anion and cation exchange membranes, a partition board and a positive and negative electrode assembly, wherein a plurality of anion and cation exchange membranes are arranged between the positive and negative electrodes in a staggered manner and are separated by the partition board to form two desalting and concentrating systems.
When mine water flows through the ion exchange column, the rotation of the ion exchange column is adjusted according to the hardness of the mine water, and the rotation speed range of the ion exchange column is as follows: 10 r/min-100 r/min, and the total hardness range of the mine water is generally 100 mg/L-700 mg/L. When high-hardness mine water is treated, the contact time of the ion exchange resin and the mine water is longer, and the rotating speed of the ion exchange column can be reduced; when the low-hardness mine water is treated, the rotation speed of the ion exchange column can be accelerated, the contact time of the resin and the mine water is shortened, and the treatment speed is accelerated.
The clapboard is arranged between the anion exchange membrane and the cation exchange membrane, plays the role of separating and supporting the anion exchange membrane and the cation exchange membrane, forms a water flow channel to form a dense chamber and a dilute chamber which are distributed in a staggered way, and is provided with a water inlet and outlet hole, a water distribution tank, a water collection tank, a water flowing channel and a water passing channel. The separator is usually used in combination with a screen, which uses a non-conductive material, is acid-and corrosion-resistant, dimensionally stable and has a certain elasticity, and the separator material used in the electrodialyser is soft polyvinyl chloride. The thickness range of the clapboard is 0.5 mm-2 mm, and the thin clapboard is used as much as possible on the premise of not influencing the performance. The partition plate is often used together with a separation net in a matching and sticking mode, and the separation net has a stirring effect and increases the turbulence degree of mine water. The separation net is an ion exchange conductive net, and ion exchange active groups are arranged on the separation net, so that the separation net has ion exchange capacity. After the saline water is introduced into the compartment, under the action of a direct current power supply, cations migrate to the cathode, and anions migrate to the anode, so that the saline water in the dilute chamber is desalted and the saline water in the concentrated chamber is concentrated due to the selective permeability of the ion exchange membrane, and the desalting purpose is realized.
Regarding the selection of the ion exchange columns, when the mine water with low hardness is treated, 001 x 7 type cation resin can be put into all three ion exchange columns, and a single-stage ion exchange process is adopted; when high-hardness mine water is treated, 001 × 7 type cation resin can be put into the first ion exchange column, D61 type resin can be put into the second ion exchange column, and a two-stage series ion exchange process of 001 × 7 and D61 resins is adopted, so that different resins can be filled or combined according to actual requirements in other cases.
The electrodes are arranged at two ends of the electrodialyzer and connected with a direct current power supply, the cathode material is stainless steel, and the anode material is titanium-coated ruthenium.
The rotation speed of the ion exchange column is set according to the mine water concentration, and the rotation speed range of the ion exchange column is as follows: 10 r/min-100 r/min, the total hardness range of the mine water is generally 100 mg/L-700 mg/L, and the rotating speed of the ion exchange column can be set according to the hardness condition of the treated mine water. When the water quality detector detects that the hardness of the outlet water of the ion exchange column is increased and exceeds the range (150 mg/L), closing electric valves on a water inlet pipeline and a water outlet pipeline, stopping working, using a standby ion exchange column to continue working, then opening a medicament adding device, adding 10% NaCl solution into the ion exchange column for resin regeneration, and setting the rotation speed of the ion exchange column to be 50r/min so as to efficiently regenerate the ion exchange resin. Finally, the mine water treated by the ion exchange column flows into an electrodialyzer to complete desalination and concentration in the electrodialyzer to generate fresh water.
A first working condition (as shown in fig. 4-6): when the three ion exchange columns are used independently, the first ion exchange column is in a working state, the mine water flowing out of the pretreatment tank 4 is softened, the other two ion exchange columns are in a standby state, the first electric valve 61, the second electric valve 62 and the seventh electric valve 67 are opened, the third electric valve 63, the fourth electric valve 64, the fifth electric valve 65, the sixth electric valve 66, the eighth electric valve 68 and the ninth electric valve 69 are closed, the water fed into the electrodialyzer 12 sequentially flows through the first electric valve 61, the second electric valve 62, the first ion exchange column 71 and the seventh electric valve 67, flows into the electrodialyzer 12 and is desalted and concentrated, the fresh water flows from the total water outlet 11 to the underground water-using equipment, and the residual concentrated water flows out of the concentrated water outlet 13 and is subsequently treated; when the water quality detector detects that the hardness of mine water exceeds a specified range, the first ion exchange column 71 is stopped being used, the ion exchange resin in the mine water is subjected to a regeneration experiment, the second ion exchange column 72 is used for replacing work, the first electric valve 61, the third electric valve 63 and the eighth electric valve 68 are opened, the second electric valve 62, the fourth electric valve 64, the fifth electric valve 65, the sixth electric valve 66, the seventh electric valve 67 and the ninth electric valve 69 are closed, the inlet water of the electrodialyzer sequentially flows through the first electric valve 61, the third electric valve 63, the second ion exchange column 72 and the eighth electric valve 68, flows into the electrodialyzer 12 and is subjected to desalination and concentration treatment, the fresh water flows from the main water outlet 11 to various underground water-using equipment, and the residual concentrated water flows out from a concentrated water outlet and is subsequently treated; when the water quality detector detects that the hardness of the mine water exceeds a specified range, the second ion exchange column 72 is stopped to perform a regeneration experiment on the ion exchange resin in the mine water, the third ion exchange column 73 is used for replacing work, the first electric valve 61, the fourth electric valve 64 and the ninth electric valve 69 are opened, the second electric valve 62, the third electric valve 63, the fifth electric valve 65, the sixth electric valve 66, the seventh electric valve 67 and the eighth electric valve 68 are closed, the inlet water of the electrodialyzer sequentially flows through the first electric valve 61, the fourth electric valve 64, the third ion exchange column 73 and the ninth electric valve 69, flows into the electrodialyzer 12 and is desalted and concentrated, the fresh water flows from the total water outlet 11 to the underground water-using equipment, and the residual concentrated water flows out from the concentrated water outlet 13 and is subsequently treated. And when the water quality detector detects that the hardness of the mine water exceeds the specified range, stopping using the third ion exchange column 73, performing a regeneration experiment on the ion exchange resin in the mine water, and repeating the steps to continuously soften the mine water.
Working condition two (as shown in fig. 3): when the requirement for softening mine water is high, three ion exchange columns are connected in series for use, 001 x 7, D61 and 732 resins are sequentially filled into the first ion exchange column and the third ion exchange column, the ion exchange capacity of the three resins is sequentially enhanced, and hard ions in the mine water can be gradually removed. The mine water sequentially flows through the three ion exchange columns, the first electric valve 61, the second electric valve 62, the fifth electric valve 65, the sixth electric valve 66 and the ninth electric valve 69 are opened, and the third electric valve 63, the fourth electric valve 64, the seventh electric valve 67 and the eighth electric valve 68 are closed. After ion exchange, mine water flows into the water inlet of the electrodialyzer.
Operating condition three (as shown in fig. 2): when the three ion exchangers are used in parallel, the three ion exchange columns are all in a working state, the first electric valve 61, the second electric valve 62, the third electric valve 63, the fourth electric valve 64, the seventh electric valve 67, the eighth electric valve 68 and the ninth electric valve 69 are opened, the fifth electric valve 65 and the sixth electric valve 66 are closed, mine water simultaneously enters the three ion exchange columns, flows into the electrodialyzer 12 after ion exchange treatment, fresh water flows out of the main water outlet 11 after electrodialysis desalination treatment, and concentrated water flows out of the concentrated water outlet 13 and is subsequently treated.
Claims (10)
1. A coal mine underground water softening method is characterized in that: a pretreatment pool is arranged at the main water inlet, a PAC coagulant is filled in the pretreatment pool and is used for removing suspended matters such as coal dust with larger particle size in mine water, and after the mine water is subjected to coagulating sedimentation treatment, sediment is discharged from a sediment outlet for subsequent treatment; the pretreated mine water flows into an ion exchange column, after hardness of the mine water is removed by the ion exchange column, the mine water is discharged into an electrodialyser for desalination, the electrodialyser comprises cation and anion exchange membranes, partition plates and positive and negative electrode assemblies, and a plurality of cation and anion exchange membranes are arranged between the positive and negative electrodes in a staggered mode and are separated by the partition plates to form two systems of desalination and concentration.
2. The coal mine underground water softening method according to claim 1, characterized in that: when mine water flows through the ion exchange column, the rotation of the ion exchange column is adjusted according to the hardness of the mine water, the rotation speed of the ion exchange column is 10 r/min-100 r/min, and the total hardness range of the mine water is 100 mg/L-700 mg/L; when high-hardness mine water is treated, the contact time of the ion exchange resin and the mine water is longer, and the rotating speed of the ion exchange column is reduced; when the low-hardness mine water is treated, the rotation speed of the ion exchange column is accelerated, the contact time of the resin and the mine water is shortened, and the treatment speed is accelerated.
3. The coal mine underground water softening method according to claim 1, characterized in that: when low-hardness mine water is treated, 001X 7 type cationic resin can be put into all three ion exchange columns, and a single-stage ion exchange process is adopted; when high-hardness mine water is treated, 001 x 7 type cation resin is put into the first ion exchange column, D61 type resin is put into the second ion exchange column, and a two-stage series ion exchange process of 001 x 7 and D61 resin is adopted; and in other cases, different resins are filled or combined according to actual requirements.
4. The coal mine underground water softening method according to claim 1, characterized in that: when the water quality detector detects that the hardness of the outlet water of the ion exchange column is increased and exceeds 150mg/L, closing electric valves on a water inlet pipeline and a water outlet pipeline, stopping working, using a standby ion exchange column to continue working, then opening a medicament adding device, adding 10% NaCl solution into the ion exchange column for resin regeneration, and setting the rotation speed of the ion exchange column to be 50r/min to ensure that the ion exchange resin is efficiently regenerated.
5. The coal mine underground water softening method according to claim 1, characterized in that: when the three ion exchange columns are used independently, the first ion exchange column is in a working state, the mine water flowing out of the pretreatment tank is softened, the other two ion exchangers are in a standby state, the first electric valve, the second electric valve and the seventh electric valve are opened, the third electric valve, the fourth electric valve, the fifth electric valve, the sixth electric valve, the eighth electric valve and the ninth electric valve are closed, the inflow water of the electrodialyzer sequentially flows through the first electric valve, the second electric valve, the first ion exchange column and the seventh electric valve, the fresh water flows to all underground water using equipment from the main water outlet after desalination and concentration treatment of the inflow electrodialyzer, and the residual concentrated water flows out of the concentrated water discharge outlet and is subsequently treated; when the water quality detector detects that the hardness of mine water exceeds a specified range, stopping using the first ion exchange column, performing a regeneration experiment on ion exchange resin in the first ion exchange column, replacing the mine water with a second ion exchange column, opening the first electric valve, the third electric valve and the eighth electric valve, closing the second electric valve, the fourth electric valve, the fifth electric valve, the sixth electric valve, the seventh electric valve and the ninth electric valve, enabling inlet water of the electrodialyzer to sequentially flow through the first electric valve, the third electric valve, the second ion exchange column and the eighth electric valve, enabling the inlet water to flow into the electrodialyzer to be subjected to desalination and concentration treatment, enabling fresh water to flow from a main water outlet to underground water-using equipment, enabling residual concentrated water to flow from a concentrated water outlet, and subsequently treating the residual concentrated water; when the water quality detector detects that the hardness of mine water exceeds a specified range, stopping using the second ion exchange column, performing a regeneration experiment on ion exchange resin in the mine water, replacing the mine water with a third ion exchange column, opening the first electric valve, the fourth electric valve and the ninth electric valve, closing the second electric valve, the third electric valve, the fifth electric valve, the sixth electric valve, the seventh electric valve and the eighth electric valve, enabling inlet water of the electrodialyzer to sequentially flow through the first electric valve, the fourth electric valve, the third ion exchange column and the ninth electric valve, enabling the inlet water to flow into the electrodialyzer, performing desalination and concentration treatment on the inlet water, enabling fresh water to flow into each underground water-using device from a main water outlet, enabling residual concentrated water to flow out from a concentrated water outlet, and performing subsequent treatment on the residual concentrated water; and when the water quality detector detects that the hardness of the mine water exceeds the specified range, stopping using the third ion exchange column, performing a regeneration experiment on the ion exchange resin in the third ion exchange column, and repeating the steps to continuously soften the ion exchange resin.
6. The coal mine underground water softening method according to claim 1, characterized in that: when the three ion exchange columns are used in parallel, the three ion exchange columns are all in a working state, the first electric valve, the second electric valve, the third electric valve, the fourth electric valve, the seventh electric valve, the eighth electric valve and the ninth electric valve are opened, the fifth electric valve and the sixth electric valve are closed, mine water simultaneously enters the three ion exchange columns, flows into the electrodialyzer after ion exchange treatment, fresh water flows out of the main water outlet after electrodialysis desalination treatment, concentrated water flows out of the concentrated water discharge outlet, and then treatment is carried out on the mine water.
7. A coal mine underground water softening device is characterized in that: the softening system comprises three parts: the pretreatment tank, the three ion exchange columns and the electrodialyzer are connected by a plurality of electric valves and pipelines, wherein the electric valves comprise a first electric valve to a ninth electric valve, and the first electric valve controls the water inlet of the whole softening system; the second, third and fourth valves control the water inlet of the first, second and third ion exchange columns respectively; the seventh, eighth and ninth electrically operated valves control the water outlet of the first, second and third ion exchange columns respectively; the fifth electric valve is connected with the first ion exchange column and the second ion exchange column; the sixth electric valve is connected with the second ion exchange column and the third ion exchange column; a main water inlet is arranged on a pipeline connected with the pretreatment tank, a water pump is arranged on the pipeline of the main water inlet, the mine water is pumped into the pretreatment tank, the pretreatment tank is used for filtering coal dust suspended matters with larger particle sizes in the mine water, and a mine water inlet, a mine water outlet and a precipitate discharge port are respectively arranged at the upper part, the side surface and the bottom of the pretreatment tank; the first ion exchange column, the second ion exchange column and the third ion exchange column are filled with different types of ion exchange resins according to actual requirements, the ion exchange columns have a rotating function, and the rotating speed of the ion exchange columns is controlled by a controller; the water quality detector is arranged on a water pipe of water outlet of each ion exchange column, and is used for detecting the hardness of the mine water treated by the ion exchange columns, and the outlet ends of the ion exchange columns are connected with the electrodialyzer; the electric valve controller controls the first electric valve to the ninth electric valve, the electric valve controller can independently control the opening and the closing of each electric valve, and the opening and closing states of the electric valves are not influenced mutually.
8. The coal mine underground water softening device of claim 7, wherein: the electrodialyzer is internally provided with a clapboard which is arranged between the anion exchange membrane and the cation exchange membrane and plays the role of dividing and supporting the anion exchange membrane and the cation exchange membrane and forms a water flow channel to form a dense chamber and a dilute chamber which are distributed in a staggered way, and the clapboard is provided with a water inlet and outlet hole, a water distribution groove, a water collection groove, a water flowing channel and a water passing channel; the partition board and the separation net are used in a combined way, the thickness of the partition board is 0.5 mm-2 mm, the separation net is an ion exchange conductive net, and the separation net is provided with ion exchange active groups and has ion exchange capacity; after the saline water is introduced into the compartment, under the action of a direct current power supply, cations migrate to the cathode, and anions migrate to the anode, so that the saline water in the dilute chamber is desalted and the saline water in the concentrated chamber is concentrated due to the selective permeability of the ion exchange membrane, and the desalting purpose is realized.
9. The coal mine underground water softening device of claim 7, wherein: the electrodialyzer is provided with a concentrated water outlet for discharging concentrated brine left after mine water is softened, the main water outlet is connected with underground water utilization equipment of a coal mine, and fresh water flows out of the main water outlet and is used for underground dust fall and fire prevention and extinguishing; electrodes are arranged at two ends of the electrodialyzer, stainless steel is selected as a cathode material, titanium-coated ruthenium is selected as an anode material, the electrodes are connected with a direct current power supply, and the direct current power supply supplies power to all electric equipment.
10. The coal mine underground water softening device of claim 7, wherein: the ion exchange column is connected with the medicament feeding device through a pipeline, and the medicament feeding device is filled with 10% NaCl solution to regenerate the ion exchange column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111037713.1A CN113754142A (en) | 2021-09-06 | 2021-09-06 | Coal mine underground water softening method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111037713.1A CN113754142A (en) | 2021-09-06 | 2021-09-06 | Coal mine underground water softening method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113754142A true CN113754142A (en) | 2021-12-07 |
Family
ID=78793111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111037713.1A Pending CN113754142A (en) | 2021-09-06 | 2021-09-06 | Coal mine underground water softening method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113754142A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1252262A (en) * | 1967-11-18 | 1971-11-03 | ||
| CN112062220A (en) * | 2020-10-10 | 2020-12-11 | 武汉恩孚水务有限公司 | Membrane treatment system inlet water softening device and process |
| CN213085655U (en) * | 2020-05-14 | 2021-04-30 | 内蒙古久科康瑞环保科技有限公司 | Low-cost mine water purification treatment system |
-
2021
- 2021-09-06 CN CN202111037713.1A patent/CN113754142A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1252262A (en) * | 1967-11-18 | 1971-11-03 | ||
| CN213085655U (en) * | 2020-05-14 | 2021-04-30 | 内蒙古久科康瑞环保科技有限公司 | Low-cost mine water purification treatment system |
| CN112062220A (en) * | 2020-10-10 | 2020-12-11 | 武汉恩孚水务有限公司 | Membrane treatment system inlet water softening device and process |
Non-Patent Citations (2)
| Title |
|---|
| 杨昌鹏等: "《生物分离技术》", 中国农业出版社, pages: 109 * |
| 毛平淮等: "KRY/G-20型煤矿井下水软化装置的设计", 《中国煤炭》, vol. 34, no. 5, 31 May 2008 (2008-05-31), pages 48 - 50 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3174037U (en) | Low energy device for desalinating seawater | |
| US20130306565A1 (en) | Electrochemical Ion Exchange Water Treatment | |
| CN103183403B (en) | Antibiotic pharmaceutical wastewater processing method and device | |
| KR101495328B1 (en) | Electrodeionization apparatus and low scale potential water treatment | |
| CN104926004A (en) | Capacitive sea water desalting equipment and method based on direct-current electric field effect | |
| US20140091039A1 (en) | System and method for the treatment of hydraulic fracturing backflow water | |
| CN104944647A (en) | Capacitance type sewage and waste water treatment device and method based on action of direct current electric field | |
| KR100501417B1 (en) | The apparatus to remove inorgaic materials in waste water using osmosis membrane and energy saving electrodes | |
| CN101935111B (en) | Wastewater recycling preparation system with low energy consumption | |
| CN102863055A (en) | Desalting system and method | |
| CN102491460A (en) | Soluble metal salt recovery and wastewater purification device and method thereof | |
| CN113754142A (en) | Coal mine underground water softening method and device | |
| CN109052745B (en) | Concentration and reduction method for easily-scaling wastewater | |
| CN103304003B (en) | Desalination system and method | |
| CN114212859B (en) | Two-stage electrochemical crosslinking electrodialysis desalination treatment system and application thereof | |
| CN102491461B (en) | Membrane-less electrodeionization-based water softening device and water softening method therefor | |
| CN212292942U (en) | Desulfurization wastewater concentration decrement processing system based on directional driving electrodialysis technology | |
| CN104909505B (en) | Treatment system applied to industrial desalination | |
| CN1273210C (en) | Electric dialysis device and method capable of saving acid consumption | |
| CN105236630A (en) | Treatment technology and system for strong brine discharged through reverse osmosis device | |
| US20210340031A1 (en) | High Recovery Electrodialysis Method | |
| CN207243623U (en) | The wastewater treatment equipment of desulfurization wastewater zero-emission | |
| CN206529367U (en) | A kind of processing of high slat-containing wastewater and resource recovery device | |
| WO2016033319A1 (en) | Electrochemically regenerated water decationization method and apparatus | |
| CN109824168A (en) | Nitrogenous dense salt wastewater treatment equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |