CN112919717A

CN112919717A - Intelligent desalting system for mine water

Info

Publication number: CN112919717A
Application number: CN202110323985.1A
Authority: CN
Inventors: 张伯阳; 樊陈子; 王旭; 詹利; 付静; 何新然
Original assignee: Guoneng Lang Xinming Environmental Protection Technology Co ltd
Current assignee: Guoneng Lang Xinming Environmental Protection Technology Co ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-06-08

Abstract

The invention provides an intelligent desalting system for mine water, which is characterized in that an intelligent real-time online regulation and control system with simple operation and good pollutant interception effect is formed through the coordination of a primary advanced treatment system, a secondary advanced treatment system, an intelligent evaporative crystallization system and a solid waste treatment system. Compared with the treatment condition of the original mine water pretreatment system, the intelligent zero-emission mine water treatment system has the advantages that 29 indexes of the effluent quality all meet the requirements of class III water of the surface water environment quality standard, the discharged salt content does not exceed 1000 mg/L, and the functional requirements of upstream and downstream related river reach water cannot be influenced. The by-product can produce industrial I-class first-grade sodium sulfate, sodium chloride with the purity of more than or equal to 99.0 percent and the secondary quality of industrial dry salt, the purity of more than or equal to 97.5 percent, sludge produced by the system can be subjected to landfill treatment, miscellaneous salt produced by the system and fly ash are mixed and used as building material fillers, and zero emission of mine water is basically realized.

Description

Intelligent desalting system for mine water

Technical Field

The invention relates to the technical field of water treatment, in particular to an intelligent desalting system for mine water.

Background

In recent years, with the gradual improvement of the awareness level of water environment protection and water resource rationalization configuration, various competitive water is coordinated, the effective management of water resources is enhanced, the polluted water body is efficiently purified through a water treatment project, the basic requirement of production water is supplemented, the regulation and control capability of the water resources is enhanced, and great benefit is brought to the sustainable development of the region. Currently, with the overall advance of green mine construction, the effective treatment and rational utilization of mine water become the focus of government attention.

Because in the mine exploitation in-process, the displacement is relatively great, the salinity is relatively higher, except some water body mine production retrieval and utilization, still can be surplus a large amount of high salt mine water not utilized, traditional water treatment mode is in the pit that has already been exploited is poured back into with high salt mine water after concentrating, the enrichment is preserved, nevertheless because the pit is accomodate the water yield and is limited, can only promote it to the earth's surface through the elevator pump after the storage is full, direct outer the arranging through simple water body subsidence and purification, not only cause the serious pollution of environment and can lead to soil salinity and alkalinity and pH value unbalance like this, also be simultaneously to the big waste of water resource. Along with the strengthening of the national water pollution treatment work, a new water quality up-to-standard environmental protection management method is provided for mine water discharge, the coal mine water discharge is required to reach the requirements of the surface water environmental quality standard (GB3838, 2002) class III, the discharged salt content is not more than 1000 mg/L, and the functional requirements of the upstream and downstream related river reach water are not influenced. The treatment of process wastewater and high-salinity water generated by a water treatment process becomes a hot point of current research, a series of process processes such as pretreatment, advanced treatment, concentration, evaporative crystallization and the like are generally adopted in the water treatment process of the traditional mine water desalting system to realize the complete separation of water and salts, but a series of problems that the crystal crystallization degree is difficult to accurately judge, the discharging time is difficult to accurately control, the purity of the salts generated by evaporative crystallization is limited and the like still exist in the evaporative crystallization stage. Therefore, there is a need for a system for treating mine water with good purification effect and controlled crystallization efficiency.

Disclosure of Invention

The invention aims to overcome the defects that the crystallization degree of an evaporative crystallization system of the existing mine water evaporative crystallization system is difficult to judge, the discharging time is difficult to accurately control, and the operation management procedure is complicated, provides the intelligent desalination system which can regulate and control the evaporative crystallization degree in real time, can realize intelligent real-time online regulation and control and is simple to operate, can realize high-efficiency resource utilization of water resources and salts on the basis of solving the problems, and has the characteristics of high treatment efficiency, low cost, good environmental benefit and the like.

The invention provides an intelligent desalting system for mine water, which comprises a primary advanced treatment system, a secondary advanced treatment system and an intelligent evaporative crystallization system which are sequentially connected;

the intelligent evaporative crystallization system is used for separating monovalent salt and divalent salt from the mine water and obtaining monovalent ion crystal salt and divalent ion crystal salt through evaporative crystallization;

wisdom evaporation crystal system includes fluorescent agent and crystal on-line monitoring system, fluorescent agent and crystal on-line monitoring system are used for carrying out real time monitoring to crystal bonding process through the video probe that sets up in wisdom evaporation crystal system, fluorescent agent and crystal on-line monitoring system are used for carrying out the perception to fluorescent substance and deducing the change of TDS and then judge the salification process of monovalent ion crystalline salt and divalent ion crystalline salt in wisdom evaporation crystal system's the mother liquor through fluorescent substance concentration change through the fluorescence sensor who sets up in wisdom evaporation crystal system with real time monitoring picture wireless transmission to PC, cell-phone and panel computer, fluorescent agent and crystal on-line monitoring system, in order to control wisdom evaporation crystal system's operation.

The invention relates to an intelligent desalting system for mine water, which is characterized in that as an optimal mode, a primary advanced treatment system comprises a primary multi-medium filter, a primary activated carbon filter, a primary ultrafiltration system, a primary reverse osmosis system and a primary high-density sedimentation tank which are sequentially connected;

the primary multi-medium filter is used for removing silt particles, suspended substances and colloid in the mine water and reducing turbidity, the primary activated carbon filter is used for removing organic pollutants in the mine water, residual chlorine, COD (chemical oxygen demand), colloid, peculiar smell, pigment and heavy metal, the primary ultrafiltration system is used for intercepting particles with the size of the colloid in the mine water, the primary reverse osmosis system is used for removing salt of the mine water and generating primary reverse osmosis concentrated water and primary reverse osmosis produced water, the primary reverse osmosis produced water is introduced into a product water header pipe through a pipeline and enters a product water tank, and the primary high-density sedimentation tank is used for removing turbidity, decoloring, deoiling, dewatering, degerming, deodorizing, removing algae, removing COD (chemical oxygen demand), BOD (biochemical oxygen demand) and heavy metal ions and removing metal ion particles and forming primary high-density sedimentation tank supernatant.

The invention relates to an intelligent desalting system for mine water, which is characterized in that a primary high-density sedimentation tank comprises a reaction tank, a flocculation tank and a sedimentation tank which are sequentially connected, wherein the reaction tank is used for removing turbidity, decoloration, deoiling, dehydration, degerming, deodorization, algae removal and removal of COD (chemical oxygen demand), BOD (biochemical oxygen demand) and heavy metal ions in primary reverse osmosis concentrated water under the action of polyferric sulfate; the flocculation tank is used for leading the effluent of the reaction tank to sink under the action of polyacrylamide to remove calcium, magnesium, strontium, fluorine and barium ion particles, the sedimentation tank is used for leading the sediment in the effluent of the flocculation tank to sink and form supernatant of a primary high-density sedimentation tank, and the sedimentation tank is connected with a solid waste treatment system.

The invention relates to an intelligent desalting system for mine water, which is characterized in that as an optimal mode, a secondary advanced treatment system comprises a V-shaped filter tank, a secondary ultrafiltration system, a secondary reverse osmosis system, a chlorination reaction tank, a secondary highly dense sedimentation tank, a secondary multi-medium filter, an ozone reactor, a secondary activated carbon filter, a tertiary ultrafiltration system and an ion exchanger which are sequentially connected;

the V-shaped filter tank is used for removing suspended substances, silt particles and colloid in supernatant of the primary high-density sedimentation tank, the secondary ultrafiltration system is used for intercepting particles with the size of colloid in effluent of the V-shaped filter tank, the secondary reverse osmosis system is used for removing soluble salts, colloid, viruses, bacteria, organic matters and salt in effluent of the secondary ultrafiltration system and generating secondary reverse osmosis concentrated water and secondary reverse osmosis produced water, the secondary reverse osmosis produced water is introduced into a product water header pipe through a pipeline and enters a product water tank, the chlorination reaction tank is used for removing ammonia nitrogen in the secondary reverse osmosis concentrated water, the secondary high-density sedimentation tank is used for removing all silicon in effluent of the chlorination reaction tank, a sludge discharge port of the secondary high-density sedimentation tank is connected with the solid waste treatment system, the secondary multi-media filter is used for filtering supernatant effluent of the secondary high-density sedimentation tank, and the ozone reactor is used for removing COD (chemical oxygen demand) in effluent of the, Organic matter and CO₃ ²The second-stage activated carbon filter is used for removing impurities in the effluent of the ozone reactor, the third-stage ultrafiltration system is used for intercepting particles with the size of colloid in the effluent of the second-stage activated carbon filter, and the ion exchanger is used for removing Ca in the effluent of the third-stage ultrafiltration system²⁺And Mg²⁺。

According to the intelligent mine water desalting system, as an optimal mode, the chlorination reaction tank is used for oxidizing sodium hypochlorite and ammonia nitrogen in the secondary reverse osmosis concentrated water into nitrogen through a chemical reaction by a breakpoint chlorination method and discharging the nitrogen into the atmosphere.

The invention relates to an intelligent desalting system for mine water, which is an optimal mode, wherein the intelligent evaporative crystallization system comprises a primary nanofiltration system, a saltpeter side MVR concentration system, a saltpeter dissolving tank, a saltpeter side MVR crystallization system and a freezing crystallization system which are sequentially connected with a concentrated water outlet of the primary nanofiltration system, a secondary nanofiltration system connected with a water production outlet of the primary nanofiltration system, a tertiary reverse osmosis system, a salt side MVR concentration system and a salt side MVR crystallization system which are sequentially connected with a water production outlet of the secondary nanofiltration system, and a fluorescent agent and crystal online monitoring system connected with the saltpeter side MVR crystallization system and the salt side MVR crystallization system.

According to the intelligent desalination system for mine water, as an optimal mode, the video probes and the fluorescence sensors are arranged in the saltpeter side MVR crystallization system and the salt side MVR crystallization system.

As an optimal mode, the nitrate side MVR crystallization system is further provided with a centrifuge, a dryer and a sodium sulfate storage tank, and the freezing crystallization system is further provided with a centrifuge and a miscellaneous salt storage tank;

the primary nanofiltration system is used for separating monovalent salt and divalent salt from the effluent of the ion exchanger, outputting monovalent salt mixed liquor from a water outlet of the primary nanofiltration system, and outputting divalent salt mixed liquor from a water outlet of the primary nanofiltration system;

the saltpeter side MVR concentration system is used for concentrating divalent salt mixed liquor to form saltpeter side concentrated water containing saltpeter, the saltpeter dissolving tank is used for dissolving the saltpeter to form a sodium sulfate solution, preheating the sodium sulfate solution and adding the sodium sulfate solution into the saltpeter side MVR crystallization system, the saltpeter side MVR crystallization system is used for carrying out evaporation crystallization and thickening treatment on the saltpeter side concentrated water and the sodium sulfate solution and then carrying out centrifugal separation to obtain sodium sulfate crystallized salt and mother liquor, the saltpeter side MVR crystallization system is used for drying and cooling the sodium sulfate crystallized salt and sending the sodium sulfate crystallized salt to the sodium sulfate storage tank for storage and packaging, the freezing crystallization system is used for dissolving the mother liquor and then carrying out freezing crystallization salt separation and thickening.

As an optimal mode, the salt side MVR crystallization system is further provided with a centrifuge and a dryer sodium chloride storage tank;

the second-stage nanofiltration system further separates monovalent salt and divalent salt from the first-stage nanofiltration water production end; the third-stage reverse osmosis system is used for intercepting monovalent soluble salts, colloids, viruses and bacteria of the water produced by the second-stage nanofiltration system, and the water produced by the third-stage reverse osmosis system is introduced into the product water main pipe through a pipeline and finally enters the product water tank; the salt side MVR concentration system is used for concentrating the concentrated water of the three-level reverse osmosis system, the salt side MVR crystallization system is used for pumping the concentrated water of the salt side MVR concentration system into the heater for circulating and carrying out heat exchange by the forced circulation pump after the condensed water tube pre-heater is heated, and carrying out gas-liquid separation in the separator to obtain sodium chloride salt solution, the salt side MVR crystallization system is used for carrying out evaporative crystallization and thickening treatment on the sodium chloride salt solution and then carrying out centrifugal separation to obtain sodium chloride crystal salt, and the salt side MVR concentration system is used for drying and cooling the sodium chloride crystal salt and sending the sodium chloride crystal salt to the sodium chloride storage tank for storage and packaging.

The invention relates to an intelligent desalting system for mine water, which further comprises a solid waste treatment system connected with a primary advanced treatment system, a secondary advanced treatment system and an intelligent evaporative crystallization system as an optimal mode;

the solid waste treatment system comprises a sludge thickener connected with the primary advanced treatment system and the secondary advanced treatment system and used for improving the sludge concentration, a sludge filter press connected with the sludge thickener through a sludge pump and used for separating sludge from water, a solid waste landfill site used for landfill of sludge discharged by the sludge filter press and a fly ash blending tank used for blending miscellaneous salt crystals, fly ash and concrete to form solid substances.

The invention provides an intelligent desalting system for mine water, which mainly comprises a primary advanced treatment system and a secondary advanced treatment system for concentrating salt in mine water, an intelligent evaporative crystallization system for treating salt and a solid waste treatment system, wherein the intelligent evaporative crystallization system and the solid waste treatment system are cooperated with each other to realize efficient interception of pollutants in mine water and resource extraction and utilization of salt, and the intelligent desalting system comprises:

(1) the first-stage advanced treatment system mainly comprises a first-stage multi-medium filter, a first-stage activated carbon filter, a first-stage ultrafiltration system, a first-stage reverse osmosis system, a first-stage high-density sedimentation tank and the like, all the parts are connected through pipelines, the concentrated water part continuously flows into the second-stage advanced treatment system for further treatment, the clear water part of the first-stage reverse osmosis is directly collected to a clear water main pipeline through a clear water pipeline and is finally introduced into a product water tank;

(2) the second-stage advanced treatment system mainly comprises a V-shaped filter tank, a second-stage ultrafiltration system, a second-stage reverse osmosis system, a chlorination reaction tank, a second-stage highly dense sedimentation tank, a second-stage multi-medium filter, an ozone reactor, a second-stage activated carbon filter, a third-stage ultrafiltration system, an ion exchanger and other systems, wherein the systems are connected through pipelines, the concentrated water part continuously flows into the intelligent evaporative crystallization system, and the clear water part of the second-stage reverse osmosis is directly collected to a clear water main pipeline through a clear water pipeline and is finally introduced into a product water tank;

(3) the intelligent evaporative crystallization system mainly comprises a first-stage nanofiltration system, a nitrate side MVR concentration system, a nitrate side MVR crystallization system, a freezing crystallization system, a second-stage nanofiltration system, a third-stage reverse osmosis system, a salt side MVR concentration system, a salt side MVR crystallization system, a fluorescent agent and crystal online monitoring system and the like, wherein the fluorescent agent and crystal online monitoring system is mainly used for monitoring the crystal combination process in a water body in real time through a video probe, wirelessly transmitting the fluorescent agent to a PC (personal computer), a mobile phone, a tablet personal computer and other terminals through a 5G Internet of things, sensing the fluorescent agent through a fluorescent sensor, deducing the change of TDS (total dissolved solids) in mother liquor in MVR through the concentration change of the fluorescent agent, and further judging the salt formation process of sodium sulfate and sodium chloride; clear water of the third-level reverse osmosis system is directly gathered to a clear water main pipeline through a clear water pipeline and finally introduced into a product water tank, concentrated water of the first-level nanofiltration system directly enters a saltpeter side MVR concentration system for concentration, evaporation and crystallization, and concentrated water of the third-level reverse osmosis system directly enters a salt side MVR concentration system for concentration, evaporation and crystallization;

(4) the solid waste treatment system mainly comprises a sludge thickener, a sludge filter press, a solid waste landfill site, a fly ash blending tank and the like, wherein the sludge thickener and the sludge filter press mainly concentrate precipitates in two-stage high-density sedimentation tanks, the solid waste landfill site is used for landfill treatment of generated sludge, and the fly ash blending tank is mainly used for blending and mixing miscellaneous salt, fly ash and concrete to form a building material. Cooperation between each system adopts the whole evaporation crystallization running state of on-line monitoring equipment real-time perception, judges the crystallization process and does to carry out wisdom regulation and control to the evaporation crystallization process according to crystal combination degree and mother liquor TDS concentration, guarantees to reach the fundamental goal of wisdom regulation and control with the operation of the whole desalination system of more meticulous and dynamic management.

The detailed description is as follows: the desalting system is built according to the water volume of the mine water, and the water treated by the mine water pretreatment system is introduced into the regulating reservoir, so that the water entering an advanced treatment workshop is pretreated and regulated, the water quality is balanced, the pH of the inlet water is mainly controlled, the consumption of chemicals in the neutralization effect is reduced, the fluctuation of the flow of the physical and chemical treatment system is reduced, and the chemical adding rate is suitable for the quota of the feeding equipment; the water body enters a lifting pump room after being regulated by the regulating reservoir, and is lifted to a first-stage multi-media filter of a first-stage advanced treatment system by the lifting pump room; the water body enters a first-stage multi-medium filter, and high-turbidity mine water body is mainly made to pass through granular materials with certain thickness under a certain pressure condition, so that the main purposes of removing silt particles, suspended substances, colloids and other substances in the water body and effectively reducing the turbidity of the water body are achieved, and further, the mechanical damage to membrane elements such as reverse osmosis is reduced; the water body filtered by the multi-media filter enters a primary activated carbon filter, and the method mainly aims to remove organic pollutants in water through physical adsorption by depending on a large number of micropores and a large specific surface area of activated carbon particles in a carbon bed of the primary activated carbon filter, and can remove residual chlorine in water due to the existence of oxygen-containing functional groups on non-crystalline parts of the surface of the water body, and has removal effects on COD, colloid, peculiar smell, pigment and heavy metal in water; after being filtered by a primary activated carbon filter, the water body enters a primary ultrafiltration system, and the primary ultrafiltration system is mainly used for intercepting colloid-sized particles in the water body and ensuring that water molecules and solutes with small molecular weight pass through an ultrafiltration membrane to realize purification and separation of the water body of the mine water; the water body after mechanical screening on the membrane surface of the primary ultrafiltration system enters a primary reverse osmosis system, the reverse osmosis system mainly separates solutes and solvents in the water body by means of selective interception of a semipermeable membrane, so as to effectively remove impurities such as soluble salts, colloids, viruses, bacteria and most organic matters in the water body, the reverse osmosis membrane mainly aims at removing salts in the water body, the salt removal rate is generally more than 98%, the produced water treated by the primary reverse osmosis system is introduced into a product water header pipe through a pipeline and finally enters a product water pool, and the concentrated water of the primary reverse osmosis system flows into a primary high-density sedimentation tank along the pipeline; the water body flows into a first-level high-density sedimentation tank from a concentrated water end of a first-level reverse osmosis system, the first-level high-density sedimentation tank mainly comprises a reaction tank, a flocculation tank and a sedimentation tank, Polymeric Ferric Sulfate (PFS) is put into the reaction tank of the high-density sedimentation tank and is continuously stirred by a reaction stirrer, the Polymeric Ferric Sulfate (PFS) is added for removing turbidity, decoloration, deoiling, dehydration, degerming, deodorization, algae removal and removal of COD, BOD and heavy metal ions in water, Polyacrylamide (PAM) is added into the flocculation tank of the high-density sedimentation tank to effectively improve the strength and sedimentation speed of flocs, the sedimentation tank of the high-density sedimentation tank mainly aims to accelerate the growth and sedimentation of the flocs by adding different high-density medium particles in a coagulation stage and utilizing the gravity sedimentation of the medium and the adsorption effect of the carrier to further remove calcium in the first-level concentrated water, And (3) introducing the generated precipitates of the magnesium, strontium, fluorine, barium and other plasma particles into a sludge thickener through a sludge conveying pipeline.

After being treated by the first-stage high-density sedimentation tank, the supernatant enters a V-shaped filter tank of a second-stage advanced treatment system through a pipeline, and is mainly filtered by a single-layer filter material at a constant water level to remove suspended substances, silt particles, partial colloid and other substances in the water body passing through the first-stage high-density sedimentation tank; after being filtered by the V-shaped filter tank, the water body enters a secondary ultrafiltration system, and the main purpose is to intercept waterThe colloidal particles in the body further ensure that water molecules and small molecular weight solutes pass through an ultrafiltration membrane, so that the deep purification of the mine water body is realized; the water body after the mechanical screening action on the membrane surface of the secondary ultrafiltration system enters a secondary reverse osmosis system, the reverse osmosis system is mainly used for removing impurities such as soluble salts, colloid, viruses, bacteria, most organic matters and the like in the water body after the treatment of the secondary ultrafiltration system, the reverse osmosis membrane is mainly used for removing salts in the water body, the produced water after the treatment of the secondary reverse osmosis system is introduced into a product water header pipe through a pipeline and finally enters a product water pool, and the concentrated water of the secondary reverse osmosis system flows into a chlorination reaction tank through the pipeline; concentrated water treated by the secondary reverse osmosis system enters a chlorination reaction tank, and the method mainly aims to oxidize sodium hypochlorite and ammonia nitrogen in wastewater into nitrogen through a chemical reaction by a breakpoint chlorination method, discharge the nitrogen into the atmosphere, and reduce the concentration of the ammonia nitrogen to zero approximately as the content of chlorine in free bodies in water is minimum along with the increase of the sodium hypochlorite in the water body; after the treatment of the chlorination reaction tank, water flow enters a secondary high-density sedimentation tank, and the main function is to remove all Silicon (SiO) in concentrated water of a secondary reverse osmosis system by adopting a treatment process combining chemical sedimentation and flocculation sedimentation₂) The formed sediment is led into a sludge thickener through a sludge conveying pipeline; after the sedimentation process of the secondary high-density sedimentation tank, supernatant flows into the secondary multi-media filter through a pipeline, the water body is mainly filtered according to the depth through filter materials from top to bottom, larger particles in the water are removed at the top layer, smaller particles are removed at the deeper part of a filter medium, so that the water quality reaches the standard after filtration, most of suspended substances, colloids and large-particle impurities in the secondary high-density sedimentation tank can be removed through the interception effect of the medium in the secondary multi-media filter, and the turbidity of the water body can be reduced; after the filtration process of the secondary multi-medium filter, the water body enters an ozone reactor, and the main purpose is to remove COD in the water body, oxidize organic matters in the water body to generate carbon dioxide gas, discharge the carbon dioxide gas out of a system and remove CO in the water body₃ ^2-The influence on the quality of salt in the water body is prevented; after the oxidation of the ozone reactor, the water body enters a reactor IIThe primary purpose of the secondary activated carbon filter is to enable impurities in the water body to be trapped due to the adsorption and trapping effects of the filter medium in the secondary activated carbon filter. The turbidity, residual chlorine and the like of the water body can be further reduced by the filtration of the secondary activated carbon filter. After the adsorption effect of the secondary activated carbon filter, the water body enters a three-stage ultrafiltration system, and the main purpose is to intercept particles with the size of colloid in the water body, so that water molecules and solutes with small molecular weight are ensured to pass through an ultrafiltration membrane, and the deep purification of the water body of the mine water is realized; through the filtering action of the three-stage ultrafiltration system, the water body enters the ion exchanger to mainly remove Ca in the water body²⁺And Mg²⁺The hardness in the water body is reduced, and the purity of the industrial salt in the evaporation crystallization process is improved.

After the hardness of the water is removed by the ion exchanger, the water enters a first-stage nanofiltration system of the intelligent evaporative crystallization system, and the main purpose is to effectively classify monovalent and divalent salts in the water and ensure that Cl in the water is concentrated^-、Na⁺、HCO₃ ^-And Ca²⁺、SO₄ ^2-、CO₃ ^2-The problem of secondary pollution of miscellaneous salt in the traditional thermal method is solved, the byproduct is valuable high-quality industrial crystallized salt, the resource utilization of salt is realized, and the clear water ends are gathered to a water production main pipe and finally flow into a product water pool; after the salt separation of the primary nanofiltration system, the monovalent salt mixed solution continuously enters the secondary nanofiltration system, and the primary purpose is to purify the monovalent salt mixed solution after the salt separation of the primary nanofiltration system again, so that the purity of monovalent salt solution is improved, and the purity of product salt is effectively ensured; after further salt separation by the secondary nanofiltration system, the water body enters a tertiary reverse osmosis system, and the primary purpose is to intercept monovalent soluble salts, colloids, viruses and bacteria in the water body after the salt separation by the secondary nanofiltration, the produced water treated by the tertiary reverse osmosis system is introduced into a product water main pipe through a pipeline and finally enters a product water tank, and a concentrated water end enters a salt side MVR concentration system; after the treatment of the three-level reverse osmosis system, the water body enters a salt side MVR concentration system, and the main purpose is to further concentrate the concentrated water at the salt side through the MVR, so that a water body I is obtainedThe salinity of the salt is further improved; after being concentrated by the salt side MVR concentration system, mother liquor of monovalent salt water enters the salt side MVR crystallization system, and the method mainly aims at heating the salt water containing sodium chloride in a condensed water tubular preheater and then entering an evaporator system, pumping the salt water into a heater by a forced circulation pump for circulating heat exchange, and performing gas-liquid separation in a separator; after being processed by a salt side MVR evaporation crystallization system, the sodium chloride salt solution is thickened and enters a centrifuge for centrifugal separation; centrifuging the sodium chloride crystal salt by a centrifugal machine, and drying the sodium chloride crystal salt in a sodium chloride fluidized bed; after drying, cooling and conveying the sodium chloride to a sodium chloride storage tank for storage, and after the sodium chloride is fully stored, quantitatively packaging the sodium chloride by a ton packaging machine to generate high-quality sodium chloride industrial salt; after the salt separation of the primary nanofiltration system, the mixed solution of divalent salt enters a nitrate side MVR concentration system, and the main purpose is to further concentrate nitrate side concentrated water, wherein the TDS is concentrated from 8-10 ten thousand mg/L to about 25-30 mg/L; concentrated water at the saltpeter side enters a saltpeter dissolving tank after being concentrated by MVR at the saltpeter side, and the main purpose is to ensure that mirabilite (Na) in concentrated solution₂SO₄·10H₂O) hot melting; dissolving mirabilite in a mirabilite dissolving tank to form a sodium sulfate solution, preheating, introducing into a mirabilite side MVR crystallization system, and performing gas-liquid separation in a separator; crystallizing the sodium sulfate solution through a nitrate side MVR crystallization system, then thickening, and entering a centrifuge for centrifugal separation; centrifuging the sodium sulfate crystal salt by a centrifuge, and drying in a sodium sulfate fluidized bed; after drying, cooling and conveying the sodium sulfate into a sodium sulfate storage tank for storage, and after the sodium sulfate storage tank is full of storage, quantitatively packaging the sodium sulfate by a ton packaging machine to generate high-quality sodium sulfate industrial salt; the mother liquor is dissolved and then enters a freezing crystallization system, the precipitated crystal slurry enters the freezing crystallization system to separate salt, the thickening treatment is carried out after freezing crystallization, and the salt enters a centrifuge to carry out centrifugal separation; and centrifuging the mixed salt crystals by a centrifugal machine, and then storing the mixed salt crystals in a mixed salt storage tank. The fluorescent agent and crystal on-line monitoring system is characterized by that on the basis of process window and measuring system (PVM) a fluorescent sensor is added to form a set of complete fluorescent agent and crystal on-line monitoring system, and mainly uses video probe to obtain crystallization degree, form, surface form and large size of crystal granules by means of visualization methodThe method comprises the steps of obtaining small and other related information, carrying out real-time wireless transmission on an online real-time monitoring picture to a PC (personal computer), a mobile phone, a tablet personal computer and other terminals through a 5G transmission network, wherein the transmission time is less than 0.5ms, intelligently regulating and controlling the evaporation crystallization discharge time according to the crystallization degree of sodium sulfate and sodium chloride salt crystals, ensuring that the sodium sulfate and sodium chloride crystals of the discharged material reach the standard of industrial salt, marking crystal substances through fluorescent agents, sensing fluorescent substances through fluorescent sensors, monitoring the change condition of the concentration of the fluorescent agents in the evaporation crystallization process in real time through a fluorescent agent sensing module in an online monitoring system, deducing the change of TDS (total dissolved solids) in MVR evaporation crystallization mother liquor through the change of the concentration multiple of the fluorescent agents, and further assisting. The production pipelines of the first-stage reverse osmosis system, the second-stage reverse osmosis system and the third-stage reverse osmosis system are gathered to a water production main pipe and finally gathered to a product water pool, part of water of the product water pool is recycled to a coal mine by a water distribution device to be used as daily water of the coal mine, and the rest of the product water is conveyed to an earth surface river by the water distribution device to be discharged.

The sludge subjected to the sedimentation treatment in the first-stage high-density sedimentation tank and the second-stage high-density sedimentation tank is introduced into a sludge thickener of a solid waste treatment system through a sludge pipeline, so that the sludge is concentrated under the action of gravity, the sludge concentration is improved, water and gas escape from the sludge, the sludge concentration effect is improved, the sludge subjected to the sludge concentration is discharged from a sludge discharge hopper, and the sludge is introduced into a sludge filter press through a sludge pump; after being treated by a sludge thickener, sludge is pumped into a sludge filter press by a sludge pump, the sludge filter press adopts a diaphragm plate and frame filter press, and the main purpose is to realize the separation of sludge or water quality by mechanical kinetic energy; compressing the sludge by a plate-and-frame filter press to form dry sludge, and conveying the dry sludge to a solid waste landfill site for landfill treatment; the miscellaneous salt generated by the evaporative crystallization system is mixed according to a certain proportion of the fly ash and the miscellaneous salt, the mixture is poured into a fly ash mixing pool in batches, and the formed solid matter is mixed with concrete to be used as a building material filler.

The invention has the following advantages:

(1) fluorescent agent and crystal on-line monitoring system pass through video probe and acquire crystal particle's crystallization degree, shape, surface morphology, relevant information such as size through visual means to combine the supplementary evaporation crystallization mother liquor TDS value of inferring of fluorescent agent perception module, and then concentration that can accurate control sodium sulfate and sodium chloride's crystallization point, the crystallization degree of two kinds of salt, reasonable control ejection of compact time, realize whole crystallization process's intelligent regulation and control

(2) The intelligent desalination system established by the system introduces 5G in data transmission, realizes intelligent information interaction between machine terminals, enables the whole desalination system to realize closed-loop automatic control, reduces the transmission time of various feedback information to 0.5ms, and realizes wireless connection of closed-loop control application.

(3) The system carries out advanced treatment on the mine water pretreatment water body, simultaneously carries out evaporative crystallization treatment on the water body concentrated for many times, recovers industrial salts such as sodium sulfate and sodium chloride which are byproducts generated by mine water, and the sodium sulfate salt reaches class I first-class products of industrial salts, and has the purity of more than or equal to 99.0 percent; the quality of the sodium chloride salt reaches the second grade of industrial dry salt, the purity is more than or equal to 97.5 percent, the resource treatment of the industrial salt in the mine water is realized, the cost per ton of coal is effectively reduced, and the gross profit of various industrial operations of the coal mine is improved to a great extent.

(4) The mixed salt generated by the evaporative crystallization treatment device of the system is mixed with the fly ash generated by coal mines and power plants to produce the concrete building block, and the concrete building block is used as a novel building material, so that zero discharge of coal mine water treatment and no waste discharge are really realized, the pollution of the mixed salt to the environment is relieved, the building material is provided, and a new way of resource utilization of the mixed salt is developed.

(5) The system adopts the mine water pretreatment water body as the water body of the incoming water, and obviously reduces turbidity, Chemical Oxygen Demand (COD), suspended matters (SS), soluble total solids (TDS) and fluoride (F) in the water body through a series of advanced treatments of the mine water treatment unit^-) Ammonia Nitrogen (NH)₃-N), all-Silicon (SiO)₂) The content of pollutants is equal, 29 index requirements of III-class water in the surface water environmental quality standard (GB3838-2002) are met, the water is used as production and domestic water to realize the resource utilization of mine water, the mine water standard improvement project treatment system has low operation cost,The water treatment effect is stable, and the method is a new trend in the field of development of water treatment in the future.

Drawings

FIG. 1 is a process framework diagram of an embodiment 2-3 of an intelligent desalination system for mine water.

Reference numerals:

1. pre-treating the mine water to obtain effluent; 2. a regulating tank; 3. lifting the pump house; 4. a primary multi-media filter; 5. a primary activated carbon filter; 6. a primary ultrafiltration system; 7. a first-stage reverse osmosis system; 8. a first-stage high-density sedimentation tank; 9. a V-shaped filter chamber; 10. a secondary ultrafiltration system; 11. a secondary reverse osmosis system; 12. a chlorination reaction tank; 13. a second-stage high-density sedimentation tank; 14. a two-stage multi-media filter; 15. an ozone reaction tank; 16. a secondary activated carbon filter; 17. a tertiary ultrafiltration system; 18. an ion exchanger; 19. a primary nanofiltration system; 20. nitro side MVR concentration system; 21. a nitrate dissolving tank; 22. nitro side MVR evaporation system; 23. a freezing crystallization system; 24. centrifuge No. 1; 25. a miscellaneous salt storage tank; 26. fluorescent agent and crystal on-line monitoring system; 27. a secondary nanofiltration system; 28. a third-stage reverse osmosis system; 29. a salt side MVR concentration system; 30. a salt side MVR crystallization system; 31. centrifuge No. 2; 32. dryer No. 1; 33. a sodium chloride storage tank; 34. a No. 3 centrifuge; 35. dryer No. 2; 36. a sodium sulfate storage tank; 37. a product water pool; 38. a water distribution device; 39. a surface river; 40. a phosphor reservoir; 41. a sludge thickener; 42. a sludge filter press; 43. solid waste landfill; 44. a fly ash blending tank; 45. a building material; 46. and (5) coal mines.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example 1

An intelligent desalting system for mine water comprises a primary advanced treatment system, a secondary advanced treatment system and an intelligent evaporative crystallization system which are sequentially connected;

Example 2

As shown in figure 1, the size of an adjusting tank 2 of the intelligent desalting system for mine water is 50.0m multiplied by 6.0m, the effective water depth is 5.3m, the structure of reinforced concrete has the effective volume of 13250m²(ii) a The lifting pump room 3 is provided with three centrifugal pumps (3 uses 1 spare), and the flow rate is 550m³The lift is 58m, the power is 132kW, and the rotating speed is 1485 r/min; the single design flow of the primary multi-medium filter 4 is 90m³H, diameter 3.2m, 16 is 1; the single design flow of the primary activated carbon filter 5 is 90m³The head is 40m, the power is 15kw, the first-stage ultrafiltration system 6 adopts a dragon source ultrafiltration membrane, and the flow rate of water is 234m³Per, 4 uses 1 preparation, the interception aperture is 0.03 mu m, the filtration precision is high, the design flux is 30-120 LMH, and the nominal area is 40m²The recovery rate is 92 percent, and the filtering direction is outward and inward; the first-stage reverse osmosis system 7 adopts the Dow (FILTEC)^TM) The reverse osmosis membrane has an effective membrane area of 400m²Stable desalting rate up to 99.5%, recovery rate up to 70%, and primary reverse osmosis inflow rate of 210m³/h，4, preparing by 1; the first-level high-density sedimentation tank 8 mainly comprises a reaction tank, a flocculation tank and a sedimentation tank, wherein the reaction tank and the flocculation tank are integrally constructed, the size of the reaction tank is 11.5 multiplied by 3.7 multiplied by 5.7m, the size of the sedimentation tank is 7.4 multiplied by 6.0 multiplied by 5.7m, the polyferric sulfate (PFS) was put into the reaction tank and stirred by a reaction stirrer, the power of which was 11kw, 2 sets of the reaction stirrers, putting coagulant aid (PAM) into the flocculation tank to complete flocculation reaction, setting 1 flocculation stirrer at 3kw, the method comprises the following steps of feeding polyferric chloride (PFS) into a reaction tank through a PFS dosing pump, wherein the flow of the PFS dosing pump is 500L/h, the lift is 20m, the power is 7.5kW, 1-time equipment is used for 1 time, the flow of the PAM dosing pump is 500L/h, the lift is 20m, the power is 7.5kW, 1-time equipment is used for 1 time, a horizontal centrifugal pump is adopted as a water inlet pump of a first-stage high-density sedimentation tank 8, and the flow is 210 m.³The lift is 15m, the power is 15kW, three sets are arranged, and one set is used for two purposes and one set is used for standby; the V type filtering pond adopts double row to arrange, and the filtering pond sets up 6, and the V type filtering pond sets up 6 simple lattices, and the V type filtering pond degree of depth is 4.4m, and the depth of water is total length is multiplied by wide more than the filtering layer surface: 27.025m is multiplied by 9.325m, and the total floor area is 252.01m²The length and the width of the single lattice filter are as follows: 8.725 x 2.705m, and the floor area is 23.6m²The filter material of the V-shaped filter 9 is quartz sand, the effective filter diameter of the filter material is generally 0.85-1.20 mm, the thickness of the filter material layer is 1.50m, and the thickness of the V-shaped filter 9 is 420m³H; the second-stage ultrafiltration system 10 adopts a Dow ultrafiltration membrane with an effective membrane area of 77m²The filtration flux is 40-120L/m²H three sets of system, 2 uses 1 spare, the water flow is 210m³The recovery rate is 92 percent; the second-stage reverse osmosis system 11 is a Heideneng (Nitto) reverse osmosis membrane with an effective membrane area of 400m²Stable desalting rate up to 99.8%, recovery rate of 80%, and secondary reverse osmosis inflow rate of 187.5m³H, 2, using 1 to prepare; the chlorination reaction tank 12 is constructed with 1 seat of reinforced concrete and the volume of the chlorination reaction tank is 120m³Epoxy resin is used as an anticorrosive layer, and a stirrer is arranged above the reaction tank, wherein the power of the stirrer is 7.5 kW; 2 secondary high-density sedimentation tanks 13 are constructed, the structure is reinforced concrete, a mode of combining chemical sedimentation and flocculation sedimentation is adopted, sodium hydroxide, sodium metaaluminate, PAM and PFS are added into a reaction tank, the pH value of a water production tank is adjusted to 8.5, and the flow is 90m³The sizes of the reaction tank and the flocculation tank are as follows: 11.5X 3.7X 6.0m, the size of the sedimentation tank is as follows: 7.4 multiplied by 6.0m, Polymeric Ferric Sulfate (PFS) is put into the reaction tank and stirred by a reaction stirrer, the power of the reaction stirrer is 11kW, 1 set is arranged, coagulant aid (PAM) is put into the flocculation tank to complete flocculation reaction, the flocculation stirrer is 3kW, 1 set is arranged, wherein the polymeric ferric chloride (PFS) is introduced into the reaction tank by a PFS dosing pump, the flow of the PFS dosing pump is 50L/h, the lift is 30m, the power is 0.25kW, 1 uses 1 spare power, the flow of the PAM dosing pump is 165L/h, the lift is 30m, the power is 0.25kW, 1 uses 1 spare power, a horizontal centrifugal pump is adopted as a high-density sedimentation tank water inlet pump, and the flow is 45m³H, the lift is 15m, the power is 4kW, three sets are arranged, and 2 sets are used for 1 set; the single set of design flow of the two-stage multi-medium filter 14 is 45m³H, the diameter is 2.8m, and 2 is prepared by 1; the ozone reaction tank 15 comprises 8 ozone contact tanks, the size of each contact tank is 5.7 multiplied by 2.0 multiplied by 4.0m, the retention time of each ozone contact tank is 1-2 h, and the volume of the whole ozone reaction tank is 360m³(ii) a A two-stage activated carbon filter 16 with a flow rate of 41m³H, the diameter is 2.4m, the height of the active carbon is 1.2m, and the mass is 7.5 tons; the three-stage ultrafiltration system 17 adopts a Dow ultrafiltration membrane with an effective membrane area of 77m²The filtration flux is 40-120L/m²H 2 sets of systems, 1 spare for 1, with water flow of 82m³The recovery rate is 92 percent; the ion exchanger 18 adopts two-stage coupling resin, and is aimed at controlling hardness in water body below 0.02mg/L, and the ion exchanger 18 contains 3 resin tanks, and its flow rate is 37.5m³H, the diameter is 1.6m, the recovery rate of 95 percent is high, 3 sets of ion exchange tanks are arranged, and 1 set of ion exchange tanks is used for 2; the first-stage nanofiltration system 19 adopts GE nanofiltration membrane, and the water inlet flow of a single set is 40.35m³H, 3 sets, 2 uses 1 device, the recovery rate is 70.5%; the concentration capacity of the saltpeter side MVR concentration system 20 is 22m³The nitrate side concentrated water is further concentrated in MVR, the TDS can be concentrated from 8-10 ten thousand mg/L to about 25-30 ten thousand mg/L, and the volume flow of a concentration compressor is 865.8m³Min, inlet pressure of 70.1kPa, power of 1000kW, 1 set of heaters with heat exchange area of 700m²2 condensate water preheaters with heat exchange area of 160m are arranged²1, arranging; the diameter of the nitrate dissolving tank 21 is 1.2m, the height is 2.0m,the material is stainless steel; the evaporation capacity of the saltpeter side MVR evaporation system 22 is 3m³H, mainly comprising a heater and a condensate water preheater, wherein the heat exchange area of the heater is 180m²1 condensate water preheater with a heat exchange area of 20m²1 set, 1 set of OSLO separator, and 118m compressor flow rate³Setting 1 unit for min, inlet pressure 57.8KPa and load-sharing power N which is 200 kW; the waste water enters a freezing and crystallizing system 23 after being evaporated and concentrated by 3 times through MVR, wherein the heat exchange area of a cooler is 350m²2 sets of freezing crystallizers with the volume of 60m³1 thickener with a volume of 12m³The power is 5.5kW, and 1 stirrer is arranged; 1 centrifuge 24 with the treatment capacity of 2-10 t/h is arranged; the size of the miscellaneous salt storage tank 25 is

1200mm × 2000mm, the material is stainless steel material; the fluorescer and crystal on-line monitoring system 26 is mainly characterized in that a fluorescent sensor is added on the basis of a process window and a measurement system (PVM) developed by Mett Toledo company Limited to form a set of complete fluorescer and crystal on-line monitoring system, an on-line real-time video picture carries out real-time infinite object transmission through a 5G transmission network, then, a crystal substance is marked through the fluorescer, the fluorescent substance is sensed through the fluorescent sensor, the salification process of crystallized sodium chloride and sodium sulfate is judged in an auxiliary mode, and 1 fluorescer and crystal on-line monitoring system is set; the secondary nanofiltration system 27 adopts GE nanofiltration membrane, and the water inlet flow of a single set is 28.5m³H, 3 sets, 2 uses 1 device, and the recovery rate is 90%; the GE reverse osmosis membrane is selected as the third-stage reverse osmosis system 28, the stable desalination rate can reach 99.8 percent, the recovery rate is 76 percent, and the inflow rate of the third-stage reverse osmosis is 51m³Setting two sets of devices, wherein 1 is used and 1 is used; salt side MVR concentration system 29 compressor with flow rate of 612m³Min, inlet pressure: 70.1KPa, load power 630kW, voltage 380V, and 1 set; 2 heaters of the salt side MVR crystallization system 30 are arranged, and the heat exchange area is 650m²Wherein the heat exchange area of the condensate water preheater is 120m²The device is provided with 1 separator,

1, setting; the number 2 centrifuge 31 has the treatment capacity of 2-10 t/h and is provided with 1 centrifuge; the No. 1 dryer 32 mainly adopts a sodium sulfate fluidized bed dryer, has the treatment capacity of 3.1t/h, is made of stainless steel 304 and is provided with a feeding distributor; sodium chloride storage tank

1500mm is multiplied by 2000mm, 1 machine is arranged, the material is stainless steel material, and the machine is packed and stored after being fully stored; 1 centrifuge 34 with the treatment capacity of 2-10 t/h is arranged; the No. 2 dryer 35 mainly adopts a sodium chloride fluidized bed dryer, has the treatment capacity of 1.5t/h, and is made of 316L stainless steel in contact with materials; sodium sulfate storage tank

1500mm is multiplied by 2000mm, 1 machine is arranged, the material is stainless steel material, and the machine is packed and stored after being fully stored; the effective volume of the product water tank 37 is 1683m³The concrete size is 33.0m multiplied by 17.0m multiplied by 3.95m, 1 seat is arranged, and the structure is a reinforced concrete and frame structure; the water distribution device 38 is mainly a greening irrigation lifting pump room, and the flow of the water pool pump room is adjusted to 960m³H, the lift is 32 m. The power is 132 kW; the water distribution device 38 recycles part of the treated product water as coal mine, and the water quantity is about 29100m³D; part of the water in the product water tank 37 is used by coal mines, and the rest of the product water is transported to an earth surface river 39 by a water distribution device 38 and discharged; the phosphor is mainly a nitride phosphor Sr₂Si₅N₈：Eu²⁺The adding proportion of the fluorescent agent to the high-salinity wastewater is 1:1200, the fluorescent agent storage tank 40 is mainly used for storing the fluorescent agent, and the overall dimension of the storage tank is

1500mm 1000 mm; 2 sludge concentration tanks are arranged, the dry sludge amount is 38.25t/d, a sludge concentrator 41, the flow rate of the sludge-water mixture is 40t/h, and the power is 0.75 kw; the sludge filter press 42 is provided with a diaphragm plate-and-frame filter press, and the total absolute dry sludge amount is 38.25 t/d; a sludge filter-pressing solid waste landfill plant mainly comprisesThe treated sludge is sent to a solid waste landfill 43 for landfill treatment; the fly ash blending pond 44 is mainly used for blending the fly ash and miscellaneous salt according to the ratio of 5:1, and the volume of the blending pond is 10m multiplied by 5m multiplied by 1.5 m; the building material 45 is mainly prepared by mixing the material blended in the fly ash blending pond and concrete.

Example 3

As shown in FIG. 1, an intelligent desalination system for mine water is an example of a mine water upgrading project of a supplementary tower of Italian Holuo flag in Ordos, Ortholes, and the water inlet amount of the project is 30000m³The water source of the project mainly comprises two types of water bodies, wherein the effluent of the replenishing and connecting tower mine water sewage treatment plant is 25000m³The effluent of the bay mine water sewage treatment plant is 5000m³The mine water pretreatment effluent 1 of the project is formed through pretreatment of a sewage treatment plant at the early stage; the effluent 1 of the mine water pretreatment is introduced into an adjusting tank 2 to adjust the water body entering the advanced treatment workshop and balance the water quality, and mainly the pH of the water body entering the advanced treatment workshop is adjusted and neutralized; after the water body is regulated by the regulating reservoir, the water body is lifted to a first-stage multi-medium filter 4 of a first-stage advanced treatment system through a lifting pump room 3, and the sediment particles, suspended substances, colloid and other substances in the water body are primarily intercepted, so that the mechanical damage to a first-stage reverse osmosis 7 reverse osmosis membrane element is effectively reduced; the water flow is filtered by the first-stage multi-media filter 4, the water body uniformly enters the first-stage activated carbon filter 5, organic pollutants in the water are removed mainly by physical adsorption of a large number of micropores and a large specific surface area of activated carbon particles, and chloride ions in the mine water body can be removed due to the fact that oxygen-containing functional groups are arranged on the surface amorphous part of the activated carbon particles; under the adsorption action of the primary activated carbon filter 5, the water body enters the primary ultrafiltration system 6 through a pipeline, and the primary ultrafiltration system is mainly used for removing colloidal substances in the water body, ensuring that water molecules and small molecular salts pass through the primary ultrafiltration system, and realizing effective purification of the water body of the mine water; the water is purified by the primary ultrafiltration system 6, the water body is pumped by the primary reverse osmosis system 7 under certain pressure, impurities such as soluble salts, colloid, virus, bacteria and the like in the water body are selectively intercepted, the desalination rate can reach 99.5 percent, the recovery rate is 70 percent, and the water body passes through the primary reverse osmosis system 7After treatment, the produced water is led into a product water main pipe through a pipeline and finally enters a product water tank 37; concentrated water of the primary reverse osmosis system 7 flows into a primary high-density sedimentation tank 8 through a pipeline, COD, BOD and ionic particles such as calcium, magnesium, strontium, fluorine and barium in a water body are removed in the primary high-density sedimentation tank 8 through a series of reactions such as reaction, flocculation, sedimentation and the like, and generated sediment is introduced into a sludge thickener 41 through a sludge conveying pipeline; after the sedimentation treatment is carried out in the primary high-density sedimentation tank 8, the supernatant enters a V-shaped filter tank 9 of a secondary advanced treatment system through a pipeline, and suspended substances, silt particles and part of colloidal substances in the water body are effectively removed; after being filtered by the V-shaped filter 9, the water body enters a secondary ultrafiltration system 10 to intercept particles with colloid sizes in the water body, so that water molecules and solutes with small molecular weight are ensured to pass through an ultrafiltration membrane, and the deep purification of the water body of the mine water is realized; the wastewater enters a secondary reverse osmosis system 11 after being mechanically screened by a secondary ultrafiltration system 10, mainly for removing colloidal substances, bacteria, most soluble salts and most organic impurities in a water body, the desalination rate can reach 99.8%, the recovery rate is 80%, the produced water treated by the secondary reverse osmosis system 11 is introduced into a product water header pipe through a pipeline and finally enters a product water tank 37, and concentrated water of the secondary reverse osmosis system 11 flows into a chlorination reaction tank 12 through the pipeline; after the concentrated water is treated by the secondary reverse osmosis system 11, the concentrated water enters a chlorination reaction tank 12, and a sodium hypochlorite solution is added into a water body to react with ammonia nitrogen in the water body by a breakpoint chlorination method so as to be converted into nitrogen gas, so that the concentration of the ammonia nitrogen in the water body is effectively reduced; after ammonia nitrogen in the water body is removed by the chlorination reaction tank 12, the water body enters a second-level high-density sedimentation tank 13, and total Silicon (SiO) in the water body is removed mainly by combining chemical sedimentation and flocculation sedimentation₂) In addition, due to the concentration by reverse osmosis, the hardness in the water body can be raised to a certain degree, the hardness of the water body can be reduced by the aid of the secondary high-density sedimentation tank 13, and sediments enter the mud bucket and are introduced into the sludge thickener 41 through the mud conveying pipeline; the supernatant enters a secondary multi-media filter 14 through a pipeline, suspended substances, colloids and large-particle impurities in the water body after the precipitation in the high-density sedimentation tank 13 are removed through the filtration of a multi-media filter medium from top to bottom, and the impurities are reducedThe turbidity in the water body is reduced; after the filtration treatment of the secondary multi-media filter 14, the water body enters an ozone reaction tank 15, COD in the water body is effectively removed, organic matters in the water body are oxidized into carbon dioxide gas, the carbon dioxide gas is discharged out of the system, and an epoxy resin is used as an anticorrosive coating; the water enters a secondary activated carbon filter 16 after being treated by a secondary multimedia device 14, impurities and residual chlorine in the water are further filtered mainly through the adsorption and interception effects of activated carbon, and the turbidity of the water is further reduced; the water body continues to enter a three-stage ultrafiltration system 17 after being adsorbed by the secondary activated carbon 16, and the main purpose is to intercept colloidal substances and other impurities in the water body, so as to ensure that water molecules and solutes with small molecular weight pass through, and realize the deep purification of the water body of the mine water; mechanically screened by a three-stage ultrafiltration system 17 and then enters an ion exchanger 18 to effectively soften the mine water body and ensure Ca in the water body²⁺And Mg²⁺The method can effectively remove the industrial salt, improve the concentration of the industrial salt in the evaporation crystallization process, ensure that the generated salt is mainly sodium salt, mainly adopt chelating resin to carry out ion exchange hardness removal by the ion exchanger 18, and adopt strong acid or strong base to carry out regeneration; the water body is subjected to hardness removal by the ion exchange system and then enters a primary nanofiltration system 19 of the intelligent evaporation system, so that monovalent salt and divalent salt in the water body are effectively separated; the mixed solution of divalent salt enters a saltpeter side concentration MVR system 20 to further concentrate saltpeter side concentrated water, and TDS is concentrated from 8-10 ten thousand mg/L to about 25-30 mg/L; concentrating to obtain sodium sulfate (Na) in water₂SO₄·10H₂O), the concentrated water on the saltpeter side is concentrated by MVR on the saltpeter side and then continuously enters the saltpeter dissolving tank 21 for the main purpose of leading the saltpeter (Na) in the concentrated solution to be mirabilite₂SO₄·10H₂O) hot melting; preheating the hot-melted sodium sulfate solution by a sodium sulfate crystallization feeding pump, then feeding the preheated sodium sulfate solution into a sodium sulfate side MVR crystallization system 22, carrying out gas-liquid separation in a separator, introducing the sodium sulfate solution into a No. 3 centrifugal machine 34 after thickening treatment to form sodium sulfate crystallized salt, further drying the obtained crystallized salt by a No. 2 drier 35 to obtain I-class first-class industrial sodium sulfate salt, storing the sodium sulfate salt with the purity of not less than 99.0 percent in a sodium sulfate storage tank 36, quantitatively packaging the sodium sulfate salt by a ton packaging machine after the sodium sulfate salt is fully stored, and packaging the sodium sulfate salt into bagsCarrying out wholesale sale; dissolving the mixed salt mother liquor, then feeding the dissolved mixed salt mother liquor into a freezing and crystallizing system 23, precipitating, separating out mixed salt, performing thickening treatment after freezing and crystallizing, feeding the mixed salt into a No. 1 centrifuge 24 for centrifugal separation, storing the separated mixed salt in a mixed salt storage tank 25, fully storing the mixed salt, and then feeding the mixed salt to a fly ash mixing tank 44 of a solid waste treatment system for further treatment; the mixed liquid of monovalent salt further enters a second-stage nanofiltration system 27, the mixed liquid after the first-stage nanofiltration system 19 separates salt is further purified, the concentration of monovalent salt solution is improved, the water body enters a third-stage reverse osmosis system 28 after the monovalent salt is further separated by the second-stage nanofiltration system 27, the soluble salt, colloid, virus, bacteria and the like in the water body are effectively intercepted, the water produced after the treatment of the third-stage reverse osmosis system is introduced into a water production main pipe through a pipeline, finally collected and enters a product water tank 37, a concentrated water end continuously enters a salt side MVR concentration system 29, the concentrated water on the salt side is further concentrated through MVR, collected and enters a salt side MVR crystallization system 30 after concentration, the water is evaporated and crystallized to supersaturation, sodium chloride salt is separated out, the sodium chloride salt is further centrifuged by a No. 2 centrifuge 31 to obtain the crystallized salt of sodium chloride, and the obtained crystallized salt is further dried by a No. 1 dryer 32, obtaining secondary quality sodium chloride salt of the finally obtained industrial dry salt, wherein the purity is more than or equal to 97.5 percent, the sodium chloride salt is stored in a sodium chloride storage tank 33, after the sodium chloride is fully stored, quantitative packaging is carried out by a ton packaging machine, and wholesale sale is carried out after the sodium chloride salt is packaged into bags; whole wisdom evaporation crystal system carries out real time control through fluorescent agent and crystal on-line monitoring system, the crystallization degree and the crystal form of crystal mainly are acquireed through visual means by video probe, online real time monitoring picture carries out real time wireless transmission to PC through 5G transmission network, the cell-phone, terminals such as panel computer, transmission time is less than 0.5ms, and according to sodium sulfate and sodium chloride salt crystal crystallization degree, and the crystal growth condition, judge evaporation crystal ejection of compact time, make real time control, in addition still change through fluorescent agent concentration multiple and infer the change of TDS in the MVR evaporation crystal mother liquor, and then carry out the auxiliary judgement to evaporation crystal ejection of compact time. Wherein the fluorescent agent is stored in a fluorescent agent storage tank 40, and the fluorescent agent is mainly selected from nitride fluorescent agent Sr₂Si₅N₈：Eu²⁺Fluorescent agent, fluorescentAdding the light agent and the high-salinity wastewater at a ratio of 1:1200, and sensing the fluorescent substance through a fluorescent sensor; the produced water of the first-stage reverse osmosis system 7, the second-stage reverse osmosis system 11 and the third-stage reverse osmosis system 28 is gathered to a water production main pipe and finally gathered to a product water pool 37, the product water pool 37 is recycled to a coal mine 46 through a water distribution device 38 to serve as daily water for the coal mine 46, and the amount of the recycled water is about 29100m³D, conveying the residual product water body to an earth surface river 39 by a water distribution device for discharge; the sediment after the sedimentation treatment in the first-stage high-density sedimentation tank 8 and the second-stage high-density sedimentation tank 13 is introduced into a sludge thickener 41 of a solid waste treatment system through a sludge pipeline, sludge is concentrated through the action of gravity, the sludge after the sludge concentration is discharged from a sludge discharge hopper, and the sludge is introduced into a sludge filter press 42 through a sludge pump; the sludge filter press adopts a diaphragm plate-and-frame filter press, and mainly aims to realize the separation of sludge or water quality through mechanical kinetic energy; compressed by a plate-and-frame filter press to form dry mud, and the dry mud is sent to a solid waste landfill 43 for landfill treatment, so as to reach the pollution control standard of general industrial solid waste storage and disposal sites (GB 18599-; the miscellaneous salt generated by the evaporative crystallization system is mixed according to the proportion of 5:1 of the fly ash and the miscellaneous salt, the mixture is poured into a fly ash mixing pool in batches, and the formed solid matter is mixed with concrete to be used as a building material 45 filler for later-stage building and construction utilization.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides an intelligent desalination system of mine water which characterized in that: the system comprises a primary advanced treatment system, a secondary advanced treatment system and an intelligent evaporative crystallization system which are connected in sequence;

wisdom evaporation crystal system includes fluorescent agent and crystal on-line monitoring system, fluorescent agent and crystal on-line monitoring system are used for being in through setting up video probe in the wisdom evaporation crystal system carries out real time monitoring to crystal bonding process, fluorescent agent and crystal on-line monitoring system are used for through the 5G thing networking with real time monitoring picture wireless transmission to PC, cell-phone and panel computer, fluorescent agent and crystal on-line monitoring system are used for through setting up fluorescent sensor in the wisdom evaporation crystal system carries out the perception to fluorescent substance and deduces through fluorescent substance concentration change the change of TDS and then the judgement in the mother liquor of wisdom evaporation crystal system monovalent ion crystallization salt with the salification process of divalent ion crystallization salt, in order to control wisdom evaporation crystal system's operation.

2. The intelligent desalination system for mine water as claimed in claim 1, wherein: the primary advanced treatment system comprises a primary multi-medium filter, a primary activated carbon filter, a primary ultrafiltration system, a primary reverse osmosis system and a primary high-density sedimentation tank which are connected in sequence;

the primary multi-medium filter is used for removing silt particles, suspended substances and colloid in the mine water and reducing turbidity, the primary activated carbon filter is used for removing organic pollutants, residual chlorine, COD, colloid, peculiar smell, pigment and heavy metal in the mine water, the primary ultrafiltration system is used for intercepting particles with the size of colloid in the mine water, the primary reverse osmosis system is used for removing the salinity of the mine water and generating primary reverse osmosis concentrated water and primary reverse osmosis produced water, the first-level reverse osmosis water production is introduced into a product water header pipe through a pipeline and enters a product water tank, and the first-level high-density sedimentation tank is used for turbidity removal, decoloration, deoiling, dehydration, degerming, deodorization, algae removal, COD, BOD, heavy metal ions and metal ion removal particles of the first-level reverse osmosis concentrated water and forming first-level high-density sedimentation tank supernatant.

3. The intelligent desalination system for mine water as claimed in claim 2, wherein: the primary high-density sedimentation tank comprises a reaction tank, a flocculation tank and a sedimentation tank which are connected in sequence, and the reaction tank is used for removing turbidity, decoloration, deoiling, dehydration, degerming, deodorization, algae removal and removal of COD, BOD and heavy metal ions in water under the action of polyferric sulfate; the flocculation basin is used for making the play water of reaction tank sinks in polyacrylamide's effect and drops and remove calcium, magnesium, strontium, fluorine, barium ion granule, the sedimentation tank is used for making the sedimentation of flocculation basin play aquatic subside and form one-level high density sedimentation tank supernatant, the sedimentation tank with gu useless processing system connects.

4. The intelligent desalination system for mine water as claimed in claim 1, wherein: the second-stage advanced treatment system comprises a V-shaped filter tank, a second-stage ultrafiltration system, a second-stage reverse osmosis system, a chlorination reaction tank, a second-stage high-density sedimentation tank, a second-stage multi-medium filter, an ozone reactor, a second-stage activated carbon filter, a third-stage ultrafiltration system and an ion exchanger which are sequentially connected;

the V-shaped filtering tank is used for removing suspended substances, silt particles and colloid in the supernatant of the primary high-density sedimentation tank, the secondary ultrafiltration system is used for intercepting particles with the size of colloid in the water discharged from the V-shaped filter tank, the secondary reverse osmosis system is used for removing soluble salts, colloid, virus, bacteria, organic matters and salinity in the water discharged from the secondary ultrafiltration system and generating secondary reverse osmosis concentrated water and secondary reverse osmosis produced water, the second-stage reverse osmosis produced water is introduced into a product water main pipe through a pipeline and enters a product water tank, the chlorination reaction tank is used for removing ammonia nitrogen in the second-stage reverse osmosis concentrated water, the second-level high-density sedimentation tank is used for removing all silicon in the effluent of the chlorination reaction tank, a sludge discharge port of the second-level high-density sedimentation tank is connected with the solid waste treatment system, and the second-level multi-medium filter is used for filtering the second-level high-density sludge.Supernatant effluent of the sedimentation tank, wherein the ozone reactor is used for removing COD, organic matters and CO in effluent of the secondary multi-media filter₃ ²The secondary activated carbon filter is used for removing impurities in the effluent of the ozone reactor, the tertiary ultrafiltration system is used for intercepting particles with the size of colloid in the effluent of the secondary activated carbon filter, and the ion exchanger is used for removing Ca in the effluent of the tertiary ultrafiltration system²⁺And Mg²⁺。

5. The intelligent desalination system for mine water as claimed in claim 4, wherein: and the chlorination reaction tank is used for oxidizing sodium hypochlorite and ammonia nitrogen in the secondary reverse osmosis concentrated water into nitrogen gas through a break-point chlorination method and discharging the nitrogen gas into the atmosphere.

6. The intelligent desalination system for mine water as claimed in claim 1, wherein: wisdom evaporation crystallization system includes the one-level system of receiving filtration, with the concentrated water export of the one-level system of receiving filtration is consecutive nitre side MVR concentrated system, dissolves nitre jar, nitre side MVR crystal system, freezing crystal system, with the one-level system of receiving filtration is produced the second grade system of receiving filtration that the water export links to each other, with the tertiary reverse osmosis system, the concentrated system of salt side MVR, salt side MVR crystal system that the water export of producing of second grade system of receiving filtration is consecutive and with nitre side MVR crystal system fluorescent agent and crystal on-line monitoring system that salt side MVR crystal system all links to each other.

7. The intelligent desalination system for mine water as claimed in claim 6, wherein: the video probe and the fluorescence sensor are arranged in the saltpeter side MVR crystallization system and the salt side MVR crystallization system.

8. The intelligent desalination system for mine water as claimed in claim 6, wherein: the nitrate side MVR crystallization system is also provided with a centrifuge, a dryer and a sodium sulfate storage tank, and the freezing crystallization system is also provided with a centrifuge and a miscellaneous salt storage tank;

the saltpeter side MVR concentration system is used for concentrating the divalent salt mixed liquor to form saltpeter side concentrated water containing saltpeter, the saltpeter dissolving tank is used for dissolving the saltpeter to form a sodium sulfate solution, preheating the sodium sulfate solution and adding the sodium sulfate solution into the saltpeter side MVR crystallization system, the saltpeter side MVR crystallization system is used for carrying out evaporation crystallization and thickening treatment on the saltpeter side concentrated water and the sodium sulfate solution and then carrying out centrifugal separation to obtain sodium sulfate crystallized salt and mother liquor, the saltpeter side MVR crystallization system is used for drying and cooling the sodium sulfate crystallized salt and sending the sodium sulfate crystallized salt to the sodium sulfate storage tank for storage and packaging, the freezing crystallization system is used for dissolving the mother liquor and then carrying out freezing crystallization salt separation and thickening centrifugation to obtain mixed salt crystals, and the mixed salt storage tank is used for.

9. The intelligent desalination system for mine water as claimed in claim 8, wherein: the salt side MVR crystallization system is also provided with a centrifuge and a dryer sodium chloride storage tank;

the secondary nanofiltration system is used for further separating monovalent salt and divalent salt from the primary nanofiltration water production end; the three-stage reverse osmosis system is used for intercepting monovalent soluble salts, colloids, viruses and bacteria of the water produced by the second-stage nanofiltration system, and the water produced by the three-stage reverse osmosis system is introduced into a product water main pipe through a pipeline and finally enters a product water tank; the salt side MVR concentration system is used for concentrating concentrated water of a three-level reverse osmosis system, the salt side MVR crystallization system is used for pumping the concentrated water of the salt side MVR concentration system into a heater for circulating heat exchange after being heated by a condensed water tube pre-heater and carrying out gas-liquid separation in a separator to obtain sodium chloride solution, the salt side MVR crystallization system is used for carrying out evaporative crystallization and thickening treatment on the sodium chloride solution and then carrying out centrifugal separation to obtain sodium chloride crystal salt, and the salt side MVR concentration system is used for drying and cooling the sodium chloride crystal salt and conveying the sodium chloride crystal salt to a sodium chloride storage tank for storage and packaging.

10. The intelligent desalination system for mine water as claimed in claim 8, wherein: the system also comprises a solid waste treatment system connected with the primary advanced treatment system, the secondary advanced treatment system and the intelligent evaporative crystallization system;

the solid waste treatment system comprises a sludge thickener which is connected with the primary advanced treatment system and the secondary advanced treatment system and is used for improving the sludge concentration, a sludge filter press which is connected with the sludge thickener through a sludge pump and is used for separating sludge from water, a solid waste landfill site which is used for landfill of sludge discharged by the sludge filter press, and a fly ash blending pond which is used for blending the miscellaneous salt crystals, fly ash and concrete to form the solid matter.