CN213569929U - Coal mine water resource comprehensive utilization system - Google Patents
Coal mine water resource comprehensive utilization system Download PDFInfo
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- CN213569929U CN213569929U CN202021581562.7U CN202021581562U CN213569929U CN 213569929 U CN213569929 U CN 213569929U CN 202021581562 U CN202021581562 U CN 202021581562U CN 213569929 U CN213569929 U CN 213569929U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The utility model discloses a coal mine water resource comprehensive utilization system, which comprises an adjusting tank, a dosing system, a high-efficiency cyclone purifier, a clear water tank, a fluidized bed dosing system, a crystal seed dosing device, a chemical crystallization circulating granulation fluidized bed, a particle storage device, a sulfuric acid dosing device, a sodium hypochlorite dosing device, a softening water tank, a ceramic membrane ultrafiltration device, an ultrafiltration water tank, a reverse osmosis dosing system, a reverse osmosis device, a fresh water tank, a reverse osmosis concentrated water tank, a sodium ion exchanger, a weak acid cation exchanger, a carbon dioxide removal system, a recovery water tank, a nanofiltration scale inhibitor dosing device, a nanofiltration concentrated water tank, an electrodialysis device, a crystallizer feeding storage tank, a crystallization device and the like, the utility model has the advantages of reasonable structural design, high-efficiency and economy of process flow, can realize mine water recycling and salt resource recycling, and achieve the goal, and no sludge which is difficult to treat is generated, and the water quality of the effluent meets the standard requirements of industrial and agricultural reuse water.
Description
Technical Field
The utility model relates to a mine water advanced treatment technology field, concretely relates to colliery mine water resourceization comprehensive utilization system.
Background
A large amount of mine water is generated in the process of mining large and medium coal mines, and the mine water has the characteristics of large water quantity, high suspended matter content, high hardness, high salt content and the like. The mine water generally contains suspended matters mainly comprising coal dust and rock powder, the salt content is basically 1000-4000 mg/L, and the salt content of a small amount of mine water of a mine is more than 5000 mg/L. The salt content of the mine water is mainly from Ca2+、Mg2+、Na+、K+、SO4 2-、HCO3 -、Cl-Plasma, especially Ca2+、Na+、SO4 2-The content is higher. Therefore, the direct discharge of the mine water not only wastes a large amount of precious water resources, but also causes pollution to the surrounding environment, and simultaneously greatly restricts the normal production of coal mine enterprises.
Many large and medium-sized coal mines in China are located in Shanxi, Shaanxi, inner Mongolia, Xinjiang and other places, and are located in northern temperate zone semiarid continental climate areas, natural conditions are fragile, perennial drought and little rain are caused, and water resources are seriously deficient, so that mine water is intensively treated and reused for coal mine production water and industrial and agricultural production water in peripheral areas, the contradiction of water shortage can be effectively relieved, the local environment is protected, and sustainable development of ecological environment is facilitated. In recent years, some local governments have made very strict environmental protection governance policies about mine water treatment, and mine water is required to reach zero emission standards in many times. The mine water treatment process implemented in China at present mainly comprises the following steps: coagulation clarification, filtration, pretreatment, ultrafiltration, reverse osmosis, pretreatment, ultrafiltration, nanofiltration and the like, as in the application of the chinese patent with the application number of 201711223081.1, but these process systems have unstable pretreatment effect, prominent membrane pollution phenomenon, low degree of resource utilization of wastewater, and cannot realize zero discharge in the true sense.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a colliery mine water resourceization comprehensive utilization system, can carry out advanced treatment to this type of waste water, realize resourceization and zero release.
The utility model provides a technical scheme that above-mentioned problem adopted is: a coal mine water resource comprehensive utilization system is characterized by comprising an adjusting tank, a dosing system, a high-efficiency cyclone purifier, a clarifying water tank, a fluidized bed dosing system, a seed crystal dosing device, a chemical crystallization circulating granulation fluidized bed, a particle storage device, a sulfuric acid dosing device, a sodium hypochlorite dosing device, a softening water tank, a ceramic membrane ultrafiltration device, an ultrafiltration water tank, a reverse osmosis dosing system, a reverse osmosis device, a fresh water tank, a reverse osmosis concentrated water tank, a sodium ion exchanger, a weak acid cation exchanger, a carbon dioxide removal system, a recovery water tank, a nanofiltration scale inhibitor dosing device, a nanofiltration device, a concentrated nanofiltration water tank, an electrodialysis device, a crystallizer feeding storage tank and a crystallization device.
The water outlet of the regulating tank is communicated with the water inlet of the high-efficiency cyclone purifier, the outlet of the dosing system is communicated with the medicament inlet of the high-efficiency cyclone purifier, the water outlet of the high-efficiency cyclone purifier is communicated with the water inlet of the chemical crystallization circulating granulation fluidized bed through the clarifying water tank, the outlet of the fluidized bed dosing device is communicated with the medicament feeding inlet of the chemical crystallization circulating granulation fluidized bed, the outlet of the seed crystal feeding device is communicated with the seed crystal feeding inlet of the chemical crystallization circulating granulation fluidized bed, the granule discharging port at the bottom of the chemical crystallization circulating granulation fluidized bed is communicated with the inlet of the granule storage device, the water outlet of the chemical crystallization circulating granulation fluidized bed is communicated with the outlets of the sulfuric acid dosing device and the sodium hypochlorite dosing device and is communicated with the water inlet of the ceramic membrane ultrafiltration device through the softening water tank, and the water outlet of the ceramic membrane ultrafiltration, the water outlet of the ultrafiltration water tank is communicated with a backwash water inlet of a ceramic membrane ultrafiltration device, a backwash water outlet of the ceramic membrane ultrafiltration device is communicated with a water inlet of a clarification water tank, the water outlet of the ultrafiltration water tank and the outlet of a reverse osmosis dosing system are both communicated with the water inlet of a reverse osmosis device, a produced water outlet of the reverse osmosis device is communicated with the water inlet of a fresh water tank, a concentrated water outlet of the reverse osmosis device is communicated with the water inlet of a sodium ion exchanger through a reverse osmosis concentrated water tank, the water outlet of the sodium ion exchanger is communicated with the water inlet of a weak acid cation exchanger, the water outlet of the weak acid cation exchanger is communicated with the water inlet of a carbon dioxide removal system, and a regenerated liquid inlet of the sodium ion exchanger is respectively communicated with the water outlet of a nanofiltration; the device comprises a weak acid cation exchanger, a nanofiltration device, an electrodialysis device, a fresh water tank, a crystallization device, a sulfuric acid dosing device, a nanofiltration antisludging agent dosing device, a nanofiltration device, a recovery water tank, a nanofiltration device, a fresh water tank, a nanofiltration device, a nanofiltration concentrated water tank, an electrodialysis device, a clear water tank and a crystallizer, wherein a regenerated liquid inlet of the weak acid cation exchanger is respectively communicated with an outlet of the sulfuric acid dosing device and a water outlet of the fresh water tank, a water outlet of the carbon dioxide removal system and an outlet of the nanofiltration antisludging agent dosing device are both communicated with a water inlet of the nanofiltration device, a water outlet of the recovery water tank is communicated with a water inlet of the clear water tank, a water outlet.
Furthermore, the dosing system comprises a polyaluminium chloride dosing device and a coagulant aid dosing device, and outlets of the polyaluminium chloride dosing device and the coagulant aid dosing device are communicated with a medicament inlet of the high-efficiency cyclone purifier.
Furthermore, the fluidized bed dosing system comprises a sodium hydroxide dosing device and a sodium carbonate dosing device, and outlets of the sodium hydroxide dosing device and the sodium carbonate dosing device are communicated with a medicament inlet of the chemical crystallization circulating granulation fluidized bed.
Furthermore, the reverse osmosis dosing system comprises a reverse osmosis scale inhibitor dosing device and a reverse osmosis reducing agent dosing device, and outlets of the reverse osmosis scale inhibitor dosing device and the reverse osmosis reducing agent dosing device are communicated with a medicament inlet of the reverse osmosis device.
Further, the utility model discloses still include coal slime pond and hydroextractor, the entry in coal slime pond is linked together with high-efficient whirl clarifier's row's mud mouth, the play mud mouth in coal slime pond is linked together with the entry of hydroextractor, the supernatant export in coal slime pond and the delivery port of hydroextractor all are linked together with the water inlet of equalizing basin.
Further, the carbon dioxide removing system comprises a carbon dioxide removing device, a carbon removing fan and a carbon removing water tank, an air outlet of the carbon removing fan is communicated with an air inlet at the bottom of the carbon dioxide removing device, a water outlet of the carbon dioxide removing device is communicated with a water inlet of the carbon removing water tank, and a water outlet of the carbon removing water tank is communicated with a water inlet of the nanofiltration scale inhibitor dosing device.
Further, a water outlet of the regulating tank is communicated with a water inlet of the high-efficiency cyclone purifier through a raw water pump; the sludge outlet of the coal slime tank is communicated with the inlet of the dehydrator through a coal slime delivery pump; the water outlet of the clarifying water tank is communicated with the water inlet of the chemical crystallization circulating granulation fluidized bed through a clarifying water pump; the water outlet of the softened water tank is communicated with the water inlet of the ceramic membrane ultrafiltration device through a softened water pump; the water outlet of the ultrafiltration water tank is communicated with the backwashing water inlet of the ceramic membrane ultrafiltration device through an ultrafiltration backwashing water pump; the water outlet of the ultrafiltration water tank is communicated with the water inlet of the reverse osmosis device through an ultrafiltration water production pump and a reverse osmosis booster pump; the water outlet of the reverse osmosis concentrated water tank is communicated with the water inlet of the sodium ion exchanger through a reverse osmosis concentrated water pump; the water outlet of the recovery water tank is communicated with the water inlet of the clarified water tank through a recovery water pump, and the regenerated liquid inlet of the sodium ion exchanger is respectively communicated with the water outlet of the nanofiltration concentrated water tank and the water outlet of the fresh water tank through a first regenerated water pump and a second regenerated water pump; a regeneration liquid inlet of the weak acid cation exchanger is communicated with a water outlet of the fresh water pool through a third regeneration water pump; the water outlet of the carbon removal water tank is communicated with the water inlet of the nanofiltration device through a carbon removal water pump and a nanofiltration booster pump; the water outlet of the nanofiltration concentrated water tank is communicated with the water inlet of the electrodialysis device through a nanofiltration concentrated water pump; and the water outlet of the crystallizer feeding storage tank is communicated with the water inlet of the crystallization device through a crystallizer feeding pump.
The working method comprises the following steps: mine water enters an adjusting tank, enters a high-efficiency cyclone purifier through a raw water pump, polyaluminium chloride and a coagulant aid are added into an inlet mixer of the high-efficiency cyclone purifier for flocculation reaction, clear water after high-efficiency cyclone separation enters a clarified water tank, bottom coal slime is discharged into a coal slime tank for sedimentation, sludge discharged from the coal slime tank enters a dehydrator for dehydration, and supernatant of the coal slime tank and water dehydrated by the dehydrator return to the adjusting tank; the effluent of the clarifying water tank enters a chemical crystallization circulating granulation fluidized bed through a clarifying water pump for crystallization softening treatment, sodium hydroxide and sodium carbonate are added into a chemical feeding pipe of the chemical crystallization circulating granulation fluidized bed, calcium carbonate seed crystals are added into a seed crystal feeding pipe of the chemical crystallization circulating granulation fluidized bed, and crystal particles generated by reaction are discharged to a particle storage device through a bottom particle discharge pipe; respectively adding sulfuric acid and sodium hypochlorite into effluent of the chemical crystallization circulating granulation fluidized bed for pH adjustment and sterilization treatment, then feeding the effluent into a softening water tank, feeding the effluent into a ceramic membrane ultrafiltration device through a softening water pump for deep filtration treatment, recovering backwash water of the ceramic membrane ultrafiltration device into a clarification water tank, feeding effluent of the ceramic membrane ultrafiltration device into an ultrafiltration water tank, feeding the effluent into a reverse osmosis device through an ultrafiltration water production pump and a reverse osmosis booster pump for desalination treatment, and feeding the effluent of the reverse osmosis device into a fresh water tank; concentrated water of the reverse osmosis device enters a reverse osmosis concentrated water tank, and sequentially enters a sodium ion exchanger and a weak acid cation exchanger through a reverse osmosis concentrated water pump to remove hardness and alkali, effluent of the weak acid cation exchanger enters a carbon dioxide remover, water subjected to carbon removal treatment by the carbon dioxide remover enters a carbon removal water tank, and then is sent to a nanofiltration device through a carbon removal water pump and a nanofiltration booster pump to be subjected to salt separation treatment; the regeneration wastewater of the sodium ion exchanger and the weak acid cation exchanger enters a recovery water tank and is recovered to a clarification water tank through a recovery water pump; the water produced by the nanofiltration device enters a fresh water tank, and the concentrated water produced by the nanofiltration device enters a nanofiltration concentrated water tank and is sent to an electrodialysis device through a nanofiltration concentrated water pump for deep concentration; recovering water produced by the electrodialysis device, feeding the water into a clarifying water tank, feeding concentrated water of the electrodialysis device into a crystallizer feeding storage tank, and feeding the concentrated water into a crystallization device through a crystallizer feeding pump; finally, the crystallization device generates high-quality sodium sulfate crystallized salt, fresh water in the fresh water tank reaches the standards of industrial and agricultural recycled water, and the aim of recycling comprehensive utilization of mine water is fulfilled.
Furthermore, the efficient cyclone purifier is used for removing substances such as coal dust, colloid and the like in mine water based on the chemical coagulation and cyclone separation principle, and the chemical crystallization circulating granulation fluidized bed is used for removing substances such as coal dust, colloid and the like in mine water based on the induced crystallization principle by adding a certain amount of CaCO3Taking the crystal seeds as crystal inducing carriers, and simultaneously adding NaOH and Na into the water2CO3Make Ca be2+、Mg2+Ion generation chemical reaction to CaCO3/Mg(OH)2Crystals are attached to the surface of the crystal seeds, so that the hardness of water is removed, and difficultly treated sludge and discharged CaCO are not generated3The crystallized particles (2-3 mm) can be recycled, the upward flow velocity of the equipment is 60-100 m/h, and the calcium hardness removal rate can reach more than 90%; the ceramic membrane ultrafiltration device adopts inorganic alpha-Al2O3A ceramic membrane module having an average pore size of 30 nm; the reverse osmosis device adopts a one-stage two-stage and inter-stage pressurization structure, and the recovery rate is 70-80%; the nanofiltration device adopts a one-stage two-section or three-section structure with an intersegmental pressurization structure, and the recovery rate is 75-85%; the sodium ion exchanger adopts concentrated water generated by a nanofiltration device as regeneration liquid, and the regeneration mode is a two-step or three-step regeneration method; the electrodialysis device adopts a homogeneous membrane structure and a circulating concentration mode, the recovery rate of the device is 65-75%, and the salt content of concentrated water can reach more than 20%; the crystallization device adopts a forced circulation crystallization system and comprises a flash tank, a heat exchanger, a circulating pump, a steam compressor, a distilled water tank, a distilled water pump and the like.
Compared with the prior art, the utility model, have following advantage and effect: the utility model has the advantages of reasonable design, the high-efficient economy of process flow can realize the resource recycle of mine water retrieval and utilization and salt, reaches waste water zero release target, and does not have the mud production of intractable, goes out water quality of water and satisfies industry, agricultural reuse water standard requirement.
Drawings
Fig. 1 is the utility model discloses well coal mine water resource comprehensive utilization system's schematic structure diagram.
In the figure: an adjusting tank 1, a raw water pump 2, a polyaluminium chloride dosing device 3, a coagulant aid dosing device 4, a high-efficiency cyclone purifier 5, a coal slime tank 6, a coal slime delivery pump 7, a dehydrator 8, a clarifying water tank 9, a clarifying water pump 10, a sodium hydroxide dosing device 11, a sodium carbonate dosing device 12, a crystal seed dosing device 13, a chemical crystallization circulating granulation fluidized bed 14, a particle storage device 15, a sulfuric acid dosing device 16, a sodium hypochlorite dosing device 17, a softening water tank 18, a softening water pump 19, a ceramic membrane ultrafiltration device 20, an ultrafiltration water tank 21, an ultrafiltration backwashing water pump 22, a reverse osmosis scale inhibitor dosing device 23, a reverse osmosis reducing agent dosing device 24, an ultrafiltration water production pump 25, a reverse osmosis boosting pump 26, a reverse osmosis device 27, a fresh water tank 28, a reverse osmosis concentrated water tank 29, a reverse osmosis concentrated water pump 30, a sodium ion exchanger 31, a weak acid cation exchanger 32, The device comprises a carbon removal fan 34, a carbon removal water tank 35, a recovery water tank 36, a recovery water pump 37, a first regeneration water pump 38, a second regeneration water pump 39, a third regeneration water pump 40, a nanofiltration scale inhibitor dosing device 41, a carbon removal water pump 42, a nanofiltration booster pump 43, a nanofiltration device 44, a nanofiltration concentrated water tank 45, a nanofiltration concentrated water pump 46, an electrodialysis device 47, a crystallizer feeding storage tank 48, a crystallizer feeding pump 49 and a crystallization device 50.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Referring to fig. 1, a coal mine water resource comprehensive utilization system comprises an adjusting tank 1, a dosing system, a high-efficiency cyclone purifier 5, a clarified water tank 9, a fluidized bed dosing system, a seed crystal dosing device 13, a chemical crystallization circulating granulation fluidized bed 14, a particle storage device 15, a sulfuric acid dosing device 16, a sodium hypochlorite dosing device 17, a softening water tank 18, a ceramic membrane ultrafiltration device 20, an ultrafiltration water tank 21, a reverse osmosis dosing system, a reverse osmosis device 27, a fresh water tank 28, a reverse osmosis concentrated water tank 29, a sodium ion exchanger 31, a weak acid cation exchanger 32, a carbon dioxide removal system, a recovery water tank 36, a nanofiltration scale inhibitor dosing device 41, a nanofiltration device 44, a nanofiltration concentrated water tank 45, an electrodialysis device 47, a crystallizer feeding storage tank 48 and a crystallization device 50.
The water outlet of the regulating tank 1 is communicated with the water inlet of the high-efficiency cyclone purifier 5, the outlet of the dosing system is communicated with the medicament inlet of the high-efficiency cyclone purifier 5, the water outlet of the high-efficiency cyclone purifier 5 is communicated with the water inlet of the chemical crystallization circulating granulation fluidized bed 14 through the clarifying water tank 9, the outlet of the fluidized bed dosing device is communicated with the medicament feeding inlet of the chemical crystallization circulating granulation fluidized bed 14, the outlet of the seed crystal feeding device 13 is communicated with the seed crystal feeding inlet of the chemical crystallization circulating granulation fluidized bed 14, the granule outlet at the bottom of the chemical crystallization circulating granulation fluidized bed 14 is communicated with the inlet of the granule storage device 15, the water outlet of the chemical crystallization circulating granulation fluidized bed 14 is communicated with the outlets of the sulfuric acid dosing device 16 and the sodium hypochlorite dosing device 17 and is communicated with the water inlet of the ceramic membrane ultrafiltration device 20 through the softened water tank 18, the water outlet of, the water outlet of the ultrafiltration water tank 21 is communicated with the backwash water inlet of the ceramic membrane ultrafiltration device 20, the backwash water outlet of the ceramic membrane ultrafiltration device 20 is communicated with the water inlet of the clarification water tank 9, the water outlet of the ultrafiltration water tank 21 and the outlet of the reverse osmosis dosing system are both communicated with the water inlet of the reverse osmosis device 27, the produced water outlet of the reverse osmosis device 27 is communicated with the water inlet of the fresh water tank 28, the concentrated water outlet of the reverse osmosis device 27 is communicated with the water inlet of the sodium ion exchanger 31 through a reverse osmosis concentrated water tank 29, the water outlet of the sodium ion exchanger 31 is communicated with the water inlet of the weak acid cation exchanger 32, the water outlet of the weak acid cation exchanger 32 is communicated with the water inlet of the carbon dioxide removal system, and the regenerated liquid inlet of the sodium ion exchanger 31 is respectively communicated with; the regenerated liquid inlet of the weak acid cation exchanger 32 is respectively communicated with the outlet of the sulfuric acid dosing device 16 and the water outlet of the fresh water tank 28, the water outlet of the carbon dioxide removal system and the outlet of the nanofiltration scale inhibitor dosing device 41 are both communicated with the water inlet of the nanofiltration device 44, the water outlet of the recovery water tank 36 is communicated with the water inlet of the clarified water tank 9, the water outlet of the nanofiltration device 44 is communicated with the water inlet of the fresh water tank 28, the concentrated water outlet of the nanofiltration device 44 is communicated with the water inlet of the electrodialysis device 47 through the nanofiltration concentrated water tank 45, the water outlet of the electrodialysis device 47 is communicated with the water inlet of the clarified water tank 9, and the concentrated water outlet of the electrodialysis device 47 is communicated with the crystallization device 50 through the crystallizer feeding storage.
Specifically, the dosing system comprises a polyaluminium chloride dosing device 3 and a coagulant aid dosing device 4, and outlets of the polyaluminium chloride dosing device 3 and the coagulant aid dosing device 4 are communicated with a medicament inlet of the high-efficiency cyclone purifier 5. The fluidized bed dosing system comprises a sodium hydroxide dosing device 11 and a sodium carbonate dosing device 12, and outlets of the sodium hydroxide dosing device 11 and the sodium carbonate dosing device 12 are communicated with a medicament inlet of a chemical crystallization circulating granulation fluidized bed 14. The reverse osmosis dosing system comprises a reverse osmosis scale inhibitor dosing device 23 and a reverse osmosis reducing agent dosing device 24, and outlets of the reverse osmosis scale inhibitor dosing device 23 and the reverse osmosis reducing agent dosing device 24 are communicated with a medicament inlet of the reverse osmosis device 27. The carbon dioxide removing system comprises a carbon dioxide removing device 33, a carbon removing fan 34 and a carbon removing water tank 35, wherein an air outlet of the carbon removing fan 34 is communicated with an air inlet at the bottom of the carbon dioxide removing device 33, a water outlet of the carbon dioxide removing device 33 is communicated with a water inlet of the carbon removing water tank 35, and a water outlet of the carbon removing water tank 35 is communicated with a water inlet of the nanofiltration scale inhibitor dosing device 41.
Additionally, the utility model discloses still include coal slime pond 6 and hydroextractor 8, the entry in coal slime pond 6 is linked together with the mud discharging mouth of high-efficient whirl clarifier 5, and the mud outlet in coal slime pond 6 is linked together with hydroextractor 8's entry, and the supernatant export in coal slime pond 6 and the delivery port of hydroextractor 8 all are linked together with the water inlet of equalizing basin 1.
Specifically, a water outlet of the regulating tank 1 is communicated with a water inlet of the high-efficiency cyclone purifier 5 through a raw water pump 2; a sludge outlet of the coal slime tank 6 is communicated with an inlet of the dehydrator 8 through a coal slime delivery pump 7; the water outlet of the clarifying water tank 9 is communicated with the water inlet of the chemical crystallization circulating granulation fluidized bed 14 through a clarifying water pump 10; the water outlet of the softened water tank 18 is communicated with the water inlet of the ceramic membrane ultrafiltration device 20 through a softened water pump 19; the water outlet of the ultrafiltration water tank 21 is communicated with the backwashing water inlet of the ceramic membrane ultrafiltration device 20 through an ultrafiltration backwashing water pump 22; the water outlet of the ultrafiltration water tank 21 is communicated with the water inlet of the reverse osmosis device 27 through an ultrafiltration water production pump 25 and a reverse osmosis booster pump 26; the water outlet of the reverse osmosis concentrated water tank 29 is communicated with the water inlet of the sodium ion exchanger 31 through a reverse osmosis concentrated water pump 30; the water outlet of the recovery water tank 36 is communicated with the water inlet of the clarification water tank 9 through a recovery water pump 37, and the regeneration liquid inlet of the sodium ion exchanger 31 is respectively communicated with the water outlet of the nanofiltration concentrated water tank 45 and the water outlet of the fresh water tank 28 through a first regeneration water pump 38 and a second regeneration water pump 39; a regeneration liquid inlet of the weak acid cation exchanger 32 is communicated with a water outlet of the fresh water pool 28 through a third regeneration water pump 40; the water outlet of the carbon removal water tank 35 is communicated with the water inlet of the nanofiltration device 44 through a carbon removal water pump 42 and a nanofiltration booster pump 43; the water outlet of the nanofiltration concentrated water tank 45 is communicated with the water inlet of the electrodialysis device 47 through a nanofiltration concentrated water pump 46; the water outlet of the crystallizer feed storage tank 48 is communicated with the water inlet of the crystallizing device 50 through a crystallizer feed pump 49.
Specifically, the high-efficiency cyclone purifier 5 removes coal dust, colloid and other substances in mine water based on the chemical coagulation and cyclone separation principle, and the chemical crystallization circulating granulation fluidized bed 14 adds a certain amount of CaCO based on the induced crystallization principle3Taking the crystal seeds as crystal inducing carriers, and simultaneously adding NaOH and Na into the water2CO3Make Ca be2+、Mg2+Ion generation chemical reaction to CaCO3/Mg(OH)2Crystals are attached to the surface of the crystal seeds, so that the hardness of water is removed, and difficultly treated sludge and discharged CaCO are not generated3The crystallized particles (2-3 mm) can be recycled, the upward flow velocity of the equipment is 60-100 m/h, and the calcium hardness removal rate can reach more than 90%; the ceramic membrane ultrafiltration device 20 adopts inorganic alpha-Al2O3Ceramic membrane module, average pore diameterIs 30 nm; the reverse osmosis device 27 adopts a first-stage second-stage and intersegmental pressurization structure, and the recovery rate is 70-80%; the nanofiltration device 44 adopts a one-stage two-section or three-section structure with a pressure boosting structure between the sections, and the recovery rate is 75-85%; the sodium ion exchanger 31 adopts concentrated water generated by the nanofiltration device 44 as regeneration liquid, and the regeneration mode is a two-step or three-step regeneration method; the electrodialysis device 47 adopts a homogeneous membrane structure and a circulating concentration mode, the recovery rate of the device is 65-75%, and the salt content of concentrated water can reach more than 20%; the crystallization device 50 adopts a forced circulation crystallization system, which comprises a flash tank, a heat exchanger, a circulating pump, a vapor compressor, a distilled water tank, a distilled water pump and the like.
The working method comprises the following steps: mine water enters an adjusting tank 1, enters a high-efficiency cyclone purifier 5 through a raw water pump 2, polyaluminium chloride and a coagulant aid are added into an inlet mixer of the high-efficiency cyclone purifier 5 for flocculation reaction, clear water after high-efficiency cyclone separation enters a clarified water tank 9, bottom coal slime is discharged into a coal slime tank 6 for sedimentation, mud discharged from the coal slime tank 6 enters a dehydrator 8 for dehydration, and supernatant of the coal slime tank 6 and water separated from the dehydrator 8 return to the adjusting tank 1; the effluent of the clarifying water tank 9 enters a chemical crystallization circulating granulation fluidized bed 14 through a clarifying water pump 10 for crystallization softening treatment, sodium hydroxide and sodium carbonate are added into a chemical feeding pipe of the chemical crystallization circulating granulation fluidized bed 14, calcium carbonate seed crystals are added into a seed crystal feeding pipe of the chemical crystallization circulating granulation fluidized bed 14, and crystal particles generated by reaction are discharged to a particle storage device 15 through a bottom particle discharge pipe; the effluent of the chemical crystallization circulating granulation fluidized bed 14 is respectively added with sulfuric acid and sodium hypochlorite for pH adjustment and sterilization treatment, then enters a softening water tank 18, enters a ceramic membrane ultrafiltration device 20 through a softening water pump 19 for deep filtration treatment, backwash water of the ceramic membrane ultrafiltration device 20 is recycled to a clarification water tank 9, the effluent of the ceramic membrane ultrafiltration device 20 enters an ultrafiltration water tank 21, enters a reverse osmosis device 27 through an ultrafiltration water production pump 25 and a reverse osmosis booster pump 26 for desalination treatment, and the water produced by the reverse osmosis device 27 enters a fresh water tank 28; the concentrated water of the reverse osmosis device 27 enters a reverse osmosis concentrated water tank 29, and enters a sodium ion exchanger 31 and a weak acid cation exchanger 32 in sequence through a reverse osmosis concentrated water pump 30 for hardness removal and alkali removal, the water discharged from the weak acid cation exchanger 32 enters a carbon dioxide remover 33, the water subjected to carbon removal treatment by the carbon dioxide remover 33 enters a carbon removal water tank 35, and then is sent to a nanofiltration device 44 through a carbon removal water pump 42 and a nanofiltration booster pump 43 for salt separation treatment; the regeneration wastewater of the sodium ion exchanger 31 and the weak acid cation exchanger 32 enters a recovery water tank 36 and is recovered to a clarification water tank 9 through a recovery water pump 37; the water produced by the nanofiltration device 44 enters a fresh water tank 28, and the concentrated water produced by the nanofiltration device 44 enters a nanofiltration concentrated water tank 45 and is sent to an electrodialysis device 47 through a nanofiltration concentrated water pump 46 for deep concentration; recovering water produced by the electrodialysis device 47, feeding the recovered water into a clarifying water tank 9, feeding concentrated water of the electrodialysis device 47 into a crystallizer feeding storage tank 48, and feeding the concentrated water into a crystallization device 50 through a crystallizer feeding pump 49; finally, the crystallization device 50 generates high-quality sodium sulfate crystallized salt, and fresh water in the fresh water pool 28 reaches the industrial and agricultural reuse water standard, so that the aim of recycling comprehensive utilization of mine water is fulfilled.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should not be construed as being limited to the scope of the present invention, and any modifications and alterations made by those skilled in the art without departing from the spirit and scope of the present invention should fall within the scope of the present invention.
Claims (7)
1. A coal mine water resource comprehensive utilization system is characterized by comprising an adjusting tank (1), a dosing system, a high-efficiency cyclone purifier (5), a clarified water tank (9), a fluidized bed dosing system, a seed crystal feeding device (13), a chemical crystallization circulating granulation fluidized bed (14), a particle storage device (15), a sulfuric acid dosing device (16), a sodium hypochlorite dosing device (17), a softening water tank (18), a ceramic membrane ultrafiltration device (20), an ultrafiltration water tank (21), a reverse osmosis dosing system, a reverse osmosis device (27), a fresh water tank (28), a reverse osmosis concentrated water tank (29), a sodium ion exchanger (31), a weak acid cation exchanger (32), a carbon dioxide removal system, a recovery water tank (36), a nanofiltration scale inhibitor dosing device (41), a nanofiltration device (44), a nanofiltration concentrated water tank (45), an electrodialysis device (47), A crystallizer feed storage tank (48) and a crystallization device (50);
the water outlet of the regulating tank (1) is communicated with the water inlet of the high-efficiency cyclone purifier (5), the outlet of the dosing system is communicated with the medicament inlet of the high-efficiency cyclone purifier (5), the water outlet of the high-efficiency cyclone purifier (5) is communicated with the water inlet of the chemical crystallization circulating granulation fluidized bed (14) through a clarification water tank (9), the outlet of the fluidized bed dosing device is communicated with the medicament feeding inlet of the chemical crystallization circulating granulation fluidized bed (14), the outlet of the seed crystal feeding device (13) is communicated with the seed crystal feeding inlet of the chemical crystallization circulating granulation fluidized bed (14), the bottom row granule port of the chemical crystallization circulating granulation fluidized bed (14) is communicated with the inlet of a granule storage device (15), the water outlet of the chemical crystallization circulating granulation fluidized bed (14) is communicated with the outlets of a sulfuric acid dosing device (16) and a sodium hypochlorite dosing device (17), and is communicated with the water inlet of a ceramic membrane ultrafiltration device (20) through a softened water tank (18), the water outlet of the ceramic membrane ultrafiltration device (20) is communicated with the water inlet of an ultrafiltration water tank (21), the water outlet of the ultrafiltration water tank (21) is communicated with the backwash water inlet of the ceramic membrane ultrafiltration device (20), the backwash water outlet of the ceramic membrane ultrafiltration device (20) is communicated with the water inlet of a clarified water tank (9), the water outlet of the ultrafiltration water tank (21) and the outlet of a reverse osmosis dosing system are both communicated with the water inlet of a reverse osmosis device (27), the water production outlet of the reverse osmosis device (27) is communicated with the water inlet of a fresh water tank (28), the concentrated water outlet of the reverse osmosis device (27) is communicated with the water inlet of a sodium ion exchanger (31) through a reverse osmosis concentrated water tank (29), and the water outlet of the sodium ion exchanger (31) is communicated with the water inlet of a weak acid cation exchanger (, the water outlet of the weak acid cation exchanger (32) is communicated with the water inlet of the carbon dioxide removal system, and the regeneration liquid inlet of the sodium ion exchanger (31) is respectively communicated with the water outlet of the nanofiltration concentrated water tank (45) and the water outlet of the fresh water tank (28); the regenerated liquid inlet of the weak acid cation exchanger (32) is respectively communicated with the outlet of the sulfuric acid dosing device (16) and the water outlet of the fresh water pool (28), the water outlet of the carbon dioxide removing system and the outlet of the nanofiltration scale inhibitor dosing device (41) are both communicated with the water inlet of the nanofiltration device (44), the water outlet of the recovery water tank (36) is communicated with the water inlet of the clear water tank (9), a water outlet of the nanofiltration device (44) is communicated with a water inlet of the fresh water pool (28), a concentrated water outlet of the nanofiltration device (44) is communicated with a water inlet of the electrodialysis device (47) through a nanofiltration concentrated water tank (45), the water outlet of the electrodialysis device (47) is communicated with the water inlet of the clarification water tank (9), and a concentrated water outlet of the electrodialysis device (47) is communicated with a crystallization device (50) through a crystallizer feeding storage tank (48).
2. The coal mine water resource comprehensive utilization system as claimed in claim 1, wherein the dosing system comprises a polyaluminium chloride dosing device (3) and a coagulant aid dosing device (4), and outlets of the polyaluminium chloride dosing device (3) and the coagulant aid dosing device (4) are communicated with a medicament inlet of the high-efficiency cyclone purifier (5).
3. The coal mine water resource comprehensive utilization system as claimed in claim 1, wherein the fluidized bed dosing system comprises a sodium hydroxide dosing device (11) and a sodium carbonate dosing device (12), and outlets of the sodium hydroxide dosing device (11) and the sodium carbonate dosing device (12) are communicated with a medicament inlet of a chemical crystallization circulating granulation fluidized bed (14).
4. The coal mine water resource comprehensive utilization system as claimed in claim 1, wherein the reverse osmosis dosing system comprises a reverse osmosis scale inhibitor dosing device (23) and a reverse osmosis reducing agent dosing device (24), and outlets of the reverse osmosis scale inhibitor dosing device (23) and the reverse osmosis reducing agent dosing device (24) are communicated with a medicament inlet of a reverse osmosis device (27).
5. The coal mine water resource comprehensive utilization system as claimed in claim 1, characterized by further comprising a coal slime pond (6) and a dehydrator (8), wherein an inlet of the coal slime pond (6) is communicated with a sludge discharge port of the high-efficiency cyclone purifier (5), a sludge outlet of the coal slime pond (6) is communicated with an inlet of the dehydrator (8), and a supernatant outlet of the coal slime pond (6) and a water outlet of the dehydrator (8) are communicated with a water inlet of the regulating tank (1).
6. The coal mine water resource comprehensive utilization system as claimed in claim 1, wherein the carbon dioxide removal system comprises a carbon dioxide removal device (33), a carbon removal fan (34) and a carbon removal water tank (35), an air outlet of the carbon removal fan (34) is communicated with an air inlet at the bottom of the carbon dioxide removal device (33), a water outlet of the carbon dioxide removal device (33) is communicated with a water inlet of the carbon removal water tank (35), and a water outlet of the carbon removal water tank (35) is communicated with a water inlet of a nanofiltration scale inhibitor dosing device (41).
7. The coal mine water resource comprehensive utilization system as claimed in claim 5, wherein a water outlet of the regulating tank (1) is communicated with a water inlet of the high-efficiency cyclone purifier (5) through a raw water pump (2); a sludge outlet of the coal slime tank (6) is communicated with an inlet of the dehydrator (8) through a coal slime delivery pump (7); the water outlet of the clarified water tank (9) is communicated with the water inlet of the chemical crystallization circulating granulation fluidized bed (14) through a clarified water pump (10); the water outlet of the softened water tank (18) is communicated with the water inlet of the ceramic membrane ultrafiltration device (20) through a softened water pump (19); the water outlet of the ultrafiltration water tank (21) is communicated with the backwashing water inlet of the ceramic membrane ultrafiltration device (20) through an ultrafiltration backwashing water pump (22); the water outlet of the ultrafiltration water tank (21) is communicated with the water inlet of the reverse osmosis device (27) through an ultrafiltration water production pump (25) and a reverse osmosis booster pump (26); the water outlet of the reverse osmosis concentrated water tank (29) is communicated with the water inlet of the sodium ion exchanger (31) through a reverse osmosis concentrated water pump (30); the water outlet of the recovery water tank (36) is communicated with the water inlet of the clarified water tank (9) through a recovery water pump (37), and the regenerated liquid inlet of the sodium ion exchanger (31) is respectively communicated with the water outlet of the nanofiltration concentrated water tank (45) and the water outlet of the fresh water tank (28) through a first regenerated water pump (38) and a second regenerated water pump (39); a regeneration liquid inlet of the weak acid cation exchanger (32) is communicated with a water outlet of the fresh water pool (28) through a third regeneration water pump (40); the water outlet of the carbon dioxide removal system is communicated with the water inlet of the nanofiltration device (44) through a carbon removal water pump (42) and a nanofiltration booster pump (43); a water outlet of the nanofiltration concentrated water tank (45) is communicated with a water inlet of the electrodialysis device (47) through a nanofiltration concentrated water pump (46); the water outlet of the crystallizer feeding storage tank (48) is communicated with the water inlet of the crystallization device (50) through a crystallizer feeding pump (49).
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| CN202021581562.7U CN213569929U (en) | 2020-08-03 | 2020-08-03 | Coal mine water resource comprehensive utilization system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112194307A (en) * | 2020-08-03 | 2021-01-08 | 华电电力科学研究院有限公司 | Coal mine water resource comprehensive utilization system and method |
| CN116444106A (en) * | 2023-06-14 | 2023-07-18 | 华电电力科学研究院有限公司 | High-hardness high-sulfate type coal mine water treatment method and device |
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2020
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112194307A (en) * | 2020-08-03 | 2021-01-08 | 华电电力科学研究院有限公司 | Coal mine water resource comprehensive utilization system and method |
| CN116444106A (en) * | 2023-06-14 | 2023-07-18 | 华电电力科学研究院有限公司 | High-hardness high-sulfate type coal mine water treatment method and device |
| CN116444106B (en) * | 2023-06-14 | 2023-09-12 | 华电电力科学研究院有限公司 | High-hardness high-sulfate type coal mine water treatment method and device |
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