Novel high-salt-content mine drainage water desalination process system

Abstract

The utility model discloses a novel high-salt-content mine drainage water desalination process system which comprises an evaporator, a condenser, a steam system, a mine drainage water system, a finished product water system, a strong brine system, a condensed water and attemperation water system and a vacuum system, the steam system comprises a steam turbine steam exhaust pipeline and a steam turbine steam extraction pipeline; the output end of the steam turbine dead steam pipeline is connected with the gas input end of the evaporator; and the output end of the steam extraction pipeline of the steam turbine is connected with the gas input end of the evaporator after sequentially passing through the steam ejector and the temperature reducing device. According to the scheme, steam exhaust of a steam turbine serves as a main working condition of power steam, steam exhaust of an air cooling large pipeline is led into a first effect of an evaporator through a steam leading pipeline, and steam extraction of the steam turbine serves as a secondary working condition of the power steam; according to the technology for desalting the mine water by adopting the air-cooled dead steam, water resources are saved, gradient utilization of energy is realized, typical'two wastes are changed into one treasure ', and the technology has the advantages of low running temperature, difficulty in scaling, complex technology and simplicity in operation.

Description

Technical Field

[0001] The utility model belongs to the technical field of mine water treatment, and specifically relates to a novel high-salt mine drainage water desalination process system. Background Art

[0002] Existing mine drainage water desalination technology, such as the Chinese invention patent "A process for desalination of high-salt water and sewage treatment by freezing phase change" with application publication number CN111018030A, requires the use of cold sources to freeze high-concentration brine. MED (multiple-effect evaporation) technology is a new desalination technology developed internationally and domestically in the past 20 years. It has been widely used in seawater desalination technology, but due to its heat transfer mechanism, flow law and other technical problems, there are few reports on its use in mine water treatment. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a new high-salt mine drainage water desalination process system to solve the problems of high energy consumption in the existing mine drainage water desalination process, and to achieve more green and low-carbon, efficient and environmentally friendly, economical and reliable, sustainable and other advantages.

[0004] According to the technical scheme of the utility model, the utility model provides a novel high-salt mine drainage water desalination process system, including an evaporator, a condenser, a steam system, a mine drainage water system, a finished water system, a concentrated brine system, a condensate and a cooling water system, and a vacuum system;

[0005] The evaporator includes a first effect evaporator, a second effect evaporator and a third effect evaporator which are sequentially connected from the gas input end to the gas output end thereof, and the gas output end of the evaporator is connected to the gas input end of the condenser; the first effect evaporator, the second effect evaporator and the third effect evaporator are all provided with a spray head;

[0006] The steam system includes a steam turbine exhaust steam pipeline and a steam turbine extraction steam pipeline; the output end of the steam turbine exhaust steam pipeline is connected to the gas input end of the evaporator; the output end of the steam turbine extraction steam pipeline is connected to the gas input end of the evaporator after passing through a steam ejector and a temperature reducing device in sequence;

[0007] The mine drainage water system includes a drainage water pipeline, in which a drainage water booster pump is provided; the output end of the drainage water pipeline is connected to the liquid input end of the condenser, and the liquid output end of the condenser is connected to the spray head of the evaporator; three branch pipelines are formed in parallel between the drainage water booster pump and the condenser, wherein the first branch pipeline is connected to a finished water cooler, and the second branch pipeline is connected to a brine heater;

[0008] The finished water system includes a finished water external supply pipeline, in which a finished water cooler and a finished water pump are provided; the finished water external supply pipeline is connected to the second effect evaporator, the third effect evaporator and / or the condenser;

[0009] The concentrated brine system includes a brine discharge pipeline, in which a brine heater and a brine discharge pump are provided; the brine discharge pipeline is connected to the evaporator;

[0010] The condensate and desuperheating water system includes a return condensate water pipeline, in which a condensate water pump is provided; the return condensate water pipeline is arranged in the first-effect evaporator, and the return condensate water pipeline is connected to the condensate water system and / or desuperheating device of the unit;

[0011] The vacuum system comprises a vacuum pipeline, in which a water ring vacuum pump is arranged; the vacuum pipeline is connected with an evaporator and / or a condenser.

[0012] Furthermore, the arrangement height of the condenser is higher than that of the evaporator, and the third effect evaporator has a hot well on the side close to the condenser, and the input end of the finished water external supply pipeline is only connected to the lower end of the hot well.

[0013] Further, the finished water pump is located between the hot well and the finished water cooler.

[0014] Furthermore, the third effect evaporator has a mine water side brine well on a side close to the condenser, and the input end of the brine discharge pipeline is only connected to the lower end of the mine water side brine well.

[0015] Furthermore, the third effect evaporator has a mine water side brine well on the side close to the condenser, and the input end of the brine discharge pipeline is only connected to the lower end of the mine water side brine well; the hot well is located between the mine water side brine well and the condenser.

[0016] Furthermore, a first concentrated brine recirculation pipeline is connected to the bottom of the first-effect evaporator, a first-effect drain pump is provided in the first concentrated brine recirculation pipeline, and the other end of the first concentrated brine recirculation pipeline is connected to the pipeline between the condenser and the spray head;

[0017] The bottom of the second-effect evaporator is connected to a second concentrated brine recirculation pipeline, in which a second-effect drain water pump is arranged, and the other end of the second concentrated brine recirculation pipeline is connected to the pipeline between the condenser and the spray head.

[0018] Furthermore, the first-effect evaporator is provided with a first-effect non-condensable gas extraction port; the third-effect evaporator is provided with a third-effect non-condensable gas exhaust port and is connected to the condenser through a pipeline; the condenser is provided with a terminal non-condensable gas exhaust port; the water ring vacuum pump is connected to the first-effect non-condensable gas extraction port and the terminal non-condensable gas exhaust port through a vacuum pipeline.

[0019] Furthermore, a gas circulation pipeline is connected to the top of the third effect evaporator on one side close to the condenser, and the gas circulation pipeline is connected to the steam ejector.

[0020] Furthermore, the steam ejector is a TVC ejector.

[0021] Furthermore, the cooling device includes a cooling spray head arranged opposite to the steam ejector.

[0022] Compared with the prior art, the beneficial technical effects of the utility model are as follows:

[0023] The new high-salt mine drainage water desalination process system of the utility model makes full use of the waste heat of the steam turbine exhaust steam, and adopts the thermal seawater desalination technology MED technology to desalinate the mine drainage water; the required steam parameters are relatively low, which can match the exhaust parameters of the air-cooled steam turbine, so as to make full use of the waste heat of the exhaust steam, save energy and reduce consumption, and effectively reduce the water production cost; reduce the discharge of concentrated brine, reach or exceed the secondary reverse osmosis concentration multiple; can be used as industrial water or domestic water standards, and then after treatment, it can reach the power plant production water standards and be reused in the power plant process system. This technology of desalinating mine water with air-cooled exhaust steam saves water resources and realizes the cascade utilization of energy. It is a typical "two wastes into one treasure" and has the advantages of low operating temperature, not easy to scale, complex technology but simple operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural block diagram according to an embodiment of the utility model.

[0025] Description of reference numerals in the accompanying drawings:

[0026] 1. Evaporator; 2. Condenser; 3. Steam turbine exhaust steam pipeline; 4. Steam turbine extraction pipeline; 5. Steam ejector; 6. Cooling device; 7. Drain water pipeline; 8. Drain water booster pump; 9. Finished water cooler; 10. Brine heater; 11. Finished water external supply pipeline; 12. Finished water pump; 13. Brine discharge pipeline; 14. Brine discharge pump; 15. Condensate pump; 16. Water ring vacuum pump; 17. Hot well; 18. Mine water side brine well; 19. First-effect drain water pump; 20. Second-effect drain water pump; 21. First-effect non-condensable gas extraction outlet; 22. Terminal non-condensable gas discharge outlet; 23. Third-effect non-condensable gas discharge outlet; 24. Unit condensate system. DETAILED DESCRIPTION

[0027] The utility model provides a new high-salt mine drainage water desalination process system, more specifically a new high-salt mine drainage water desalination process system using thermal seawater desalination technology, which is particularly suitable for use in areas where coal mines and air-cooled power plants are close. It is mainly intended to solve the problems of high energy consumption in existing mine drainage water desalination processes, and achieve the advantages of being greener, more low-carbon, efficient, environmentally friendly, economically reliable, and sustainable. This solution uses power station air cooling as a heat source to desalinate mine water, which is an internationally pioneering technology and has not been reported domestically or internationally. As a new development in mine water treatment technology, the use of exhaust steam waste heat for MED desalination of mine water has injected new vitality into thermal desalination technology. With its advantage of low comprehensive cost, it will definitely have a greater impact on mine water treatment technology, especially in coal-electricity integrated enterprises and enterprises that require high-quality fresh water. It will definitely be a technology with strong market competitiveness.

[0028] See also Figure 1 A novel high-salt mine drainage water desalination process system according to an embodiment of the utility model mainly includes an evaporator 1, a condenser 2, a steam system, a mine drainage water system, a finished water system, a concentrated brine system, a condensate and cooling water system, and a vacuum system.

[0029] The evaporator 1 at least includes a first effect evaporator, a second effect evaporator and a third effect evaporator which are sequentially connected from the gas input end to the gas output end thereof, and the gas output end of the evaporator 1 is connected to the gas input end of the condenser 2. The first effect evaporator, the second effect evaporator and the third effect evaporator are all provided with necessary components such as a spray head located at the top and a three-pass water tank. In other embodiments, the evaporator 1 includes more effect evaporators, for example, it can be considered that the second effect evaporator has two or more connected parts.

[0030] Condenser 2 is a heat exchanger structure used for heat exchange between gas and liquid; the liquid passes through Figure 1 The liquid input end on the right side of the middle condenser 2 enters the heat exchange tube and then outputs through the liquid output end; the gas passes through Figure 1 The gas enters the left side of the condenser 2 and exchanges heat with the heat exchange tubes, and part of the gas is liquefied into liquid (and preferably through Figure 1 The lower left pipe of the middle condenser 2 enters the third effect evaporator), and the other part of the non-condensable (liquefied) gas flows from Figure 1 The pipeline output on the upper left of the middle condenser 2.

[0031] The steam system includes a steam turbine exhaust steam pipeline 3 and a steam turbine extraction steam pipeline 4. The output end of the steam turbine exhaust steam pipeline 3 is directly connected to the gas input end of the evaporator 1. The output end of the steam turbine extraction steam pipeline 4 is connected to the gas input end of the evaporator 1 after passing through a steam ejector 5 and a temperature reducing device 6 in sequence.

[0032] Preferably, the steam ejector 5 is a TVC ejector, also known as a steam ejector. The cooling device 6 includes a cooling spray head arranged opposite to the steam ejector 5, and the cooling spray head is used to spray low-temperature water or other solutions or other heat exchange media. The top of the third effect evaporator close to the condenser 2 (for example, the top of the hot well 17) is connected to a gas circulation pipeline, which is connected to the steam ejector 5 and can circulate a part of the gas at the end of the third effect evaporator to the steam ejector 5.

[0033] The mine drainage water system includes a drainage water pipeline 7, and a drainage water booster pump 8 is provided in the drainage water pipeline 7. The output end of the drainage water pipeline 7 is connected to the liquid input end of the condenser 2, and the liquid output end of the condenser 2 is connected to each spray head in the evaporator 1. Three branch pipelines are formed in parallel between the drainage water booster pump 8 and the condenser 2, wherein the first branch pipeline is connected to a finished water cooler 9; the second branch pipeline is connected to a brine heater 10; and the third branch pipeline is not provided with a heat exchanger, in other words, it is directly connected to the condenser 2.

[0034] The finished water system includes a finished water external supply pipeline 11, and the finished water external supply pipeline 11 has a finished water cooler 9 and a finished water pump 12; preferably, for example, the finished water pump 12 is located on the upstream side of the finished water cooler 9 and is separated by a sufficient distance; for another example, the finished water pump 12 is located between the evaporator 1 (the hot well 17) and the finished water cooler 9. The input end of the finished water external supply pipeline 11 is connected to the second effect evaporator, the third effect evaporator (i.e., the evaporator other than the first effect evaporator) and / or the condenser 2. Optionally, for example, the second effect evaporator, the third effect evaporator and the condenser 2 are respectively provided with condensate output pipelines, and the finished water external supply pipeline 11 is respectively connected to each condensate output pipeline.

[0035] Preferably, the arrangement height of the condenser 2 is higher than that of the evaporator 1, and the third effect evaporator has a hot well 17 on the side close to the condenser 2. Under the action of pressure, the condensed water in the evaporator 1 and the condenser 2 will be collected to the lower end of the hot well 17, and then the lower end of the hot well 17 will be used as the condensed water output pipeline, and the input end of the finished water external supply pipeline 11 is only connected to the lower end of the hot well 17.

[0036] The concentrated brine system includes a brine discharge pipeline 13, in which a brine heater 10 and a brine discharge pump 14 are provided; preferably, for example, the brine discharge pump 14 is located on the upstream side of the brine heater 10 and is spaced sufficiently apart. The input end of the brine discharge pipeline 13 is connected to the evaporator 1. Optionally, for example, the second effect evaporator and the third effect evaporator are each provided with a concentrated brine output pipeline, and the brine discharge pipeline 13 is respectively connected to each concentrated brine output pipeline.

[0037] Preferably, the third effect evaporator has a mine water side brine well 18 on the side close to the condenser 2. Under the action of pressure, the concentrated brine in the evaporator 1 will be collected to the lower end of the mine water side brine well 18, and then the lower end of the mine water side brine well 18 is used as the concentrated brine output pipeline, and the input end of the brine discharge pipeline 13 is only connected to the lower end of the mine water side brine well 18. Further, for the solution with a hot well 17 at the same time, the hot well 17 is located between the mine water side brine well 18 and the condenser 2.

[0038] Preferably, the first concentrated brine recirculation pipeline is connected to the bottom of the first-effect evaporator, a first-effect drain pump 19 is provided in the first concentrated brine recirculation pipeline, and the other end of the first concentrated brine recirculation pipeline is connected to the pipeline between the condenser 2 and the spray head. The second concentrated brine recirculation pipeline is connected to the bottom of the second-effect evaporator, a second-effect drain pump 20 is provided in the second concentrated brine recirculation pipeline, and the other end of the second concentrated brine recirculation pipeline is connected to the pipeline between the condenser 2 and the spray head. Thus, the concentrated brine at the front end of the evaporator 1 can be circulated in the evaporator 1.

[0039] The condensate and desuperheating water system includes a return condensate water pipeline, in which a condensate water pump 15 is provided. The input end of the return condensate water pipeline is arranged at the first effect evaporator, and the output end of the return condensate water pipeline (branched into a condensate water pipeline and a desuperheating water pipeline) is connected to the unit condensate water system 24 (for collection / discharge, etc.) and / or the desuperheating device 6 (as a heat exchange medium).

[0040] The vacuum system includes a vacuum pipeline, and the vacuum pipeline has a water ring vacuum pump 16. The input end of the vacuum pipeline is connected to the evaporator 1 and / or the condenser 2. Optionally, for example, the vacuum pipeline is connected to the first effect evaporator, the second effect evaporator, the third effect evaporator and the condenser 2 respectively.

[0041] Preferably, the first-effect evaporator (the first-effect three-pass water tank) is provided with a separate first-effect non-condensable gas extraction port 21, the non-condensable gas of the second-effect evaporator flows from the tube side to the shell side through the opening of the three-pass water tank, and the third-effect evaporator (the third-effect three-pass water tank) is provided with a three-effect non-condensable gas discharge port 23 and is directly connected to the condenser 2 through a pipeline. The condenser 2 is provided with a terminal non-condensable gas discharge port 22. The water ring vacuum pump 16 is connected to the first-effect non-condensable gas extraction port 21 and the terminal non-condensable gas discharge port 22 through a vacuum pipeline, so as to discharge the non-condensable gas.

[0042] The principle, working process and functional effect of the above solution of the utility model are further explained below.

[0043] The evaporator 1 is connected through the steam turbine extraction pipeline 4, the steam turbine exhaust steam pipeline 3, the steam ejector 5, and the temperature reduction device; it is connected through the drain water pipeline 7, the condenser 2, the drain water booster pump 8, the finished water cooler 9, and the brine heater 10; it is connected through the finished water pipeline, the condenser 2, the finished water cooler 9, and the finished water pump 12; it is connected through the concentrated brine pipeline, the brine heater 10, the first-effect drain water pump 19, the second-effect drain water pump 20, and the brine discharge pump 14; it is connected through the condensate water pipeline, the temperature reduction water pipeline, the temperature reduction device 6, and the condensate water pump 15; it is connected through the vacuum pipeline, the condenser 2, and the water ring vacuum pump 16; thus, several systems are connected.

[0044] Steam system: As the main working condition of power steam, the exhaust steam of the steam turbine is introduced into the first effect of the evaporator through the steam inlet pipe. It directly enters the evaporator 1, more specifically, directly enters the heat exchange tube bundle of the first effect. While heating and evaporating the mine water outside the heat exchange tube, the exhaust steam condenses into condensate. As the secondary working condition of power steam, when the exhaust steam parameters of the steam turbine are lower than the design requirements, the steam turbine extraction enters the steam ejector 5 (TVC), and the secondary steam of the third effect is injected into the first effect. The mixed steam enters the first effect as heating steam, thereby improving the water production ratio of the mine water desalination equipment and reducing the water production cost. The cooling device in the diffusion section after the steam ejector 5 (TVC) sprays water to cool the mixed steam, so that the temperature of the steam entering the first effect is in a saturated state.

[0045] Mine drainage water system: Mine drainage water is pumped into the drainage water system by the drainage water booster pump 8; the outlet water is preheated by the finished water cooler 9, the brine heater 10 or directly pumped into the condenser 2, and then transported to the spray system of each effect evaporator. All effect groups adopt the horizontal flow feeding method.

[0046] Finished water system: Finished water refers to fresh water produced by distillation of mine water. The finished water system collects condensed water from the second and third effect evaporators (except the first effect evaporator) and condenser 2, which is discharged from the evaporator 1 and transported to the outside through the finished water pump 12. Under the action of the pressure between the effects, the finished water flows by gravity from effect to effect. Starting from the second effect, the finished water flows by gravity into the next effect evaporator, and finally gathers in the hot well 17 of the third effect evaporator. The finished water in the condenser 2 also needs to flow by gravity to the third effect evaporator. For this purpose, the condenser 2 is arranged at a height slightly higher than the evaporator to overcome the pressure difference between the two. Finally, the finished water (product water) is supplied to the outside.

[0047] Concentrated brine system: This system is used to collect the mine water (i.e., concentrated brine) concentrated by evaporation in each effect evaporator and discharge it together. Under the action of pressure difference, the concentrated brine of each effect in the evaporator 1 flows into the second effect evaporator by gravity from the first effect evaporator, and finally collects to the mine water side of the third effect evaporator, and finally is discharged by the brine discharge pump 14 with boost pressure. In order to obtain the designed concentration ratio, part of the concentrated brine is recycled, and the first effect to second effect evaporators and the second effect to third effect evaporators are respectively provided with a first effect and a second effect drainage pump, so that the first effect drainage pump 19 and the second effect drainage pump 20 are mixed with the mine water (i.e., drainage water) and enter each effect evaporator as material water for recycling. Of course, there are pipelines and valves for mixing mine water. Finally, the concentrated brine is supplied to the outside.

[0048] Condensate and desuperheating water system: The steam entering the first-effect evaporator comes from the exhaust steam of the steam turbine or the extraction steam of the steam turbine. It is not suitable to be directly used as product water, but can be returned to the condensate system of the unit as return condensate. The condensate is pumped out by the condensate pump 15, a small part of which can be used as desuperheating water for the extraction steam to enter the desuperheating device 6, and the rest of the condensate returns to the condensate header and is discharged to the main engine condensate system.

[0049] Vacuum system: that is, vacuum pumping system, including a water ring vacuum pump 16. Its main function is to establish vacuum at startup, and to timely extract the non-condensable gas of the equipment during operation to maintain the operating vacuum of the system. A separate non-condensable gas extraction port is set in the first-effect three-pass water tank. The non-condensable gas of the second-effect evaporator flows from the tube side to the shell side through the opening of the three-pass water chamber. A non-condensable gas exhaust port is set in the third-effect three-pass, and is directly discharged to the condenser. After the non-condensable gas exhaust port is set in the condenser, it is collected with the non-condensable gas of the first effect and discharged to the atmosphere through the water ring vacuum pump 16.

[0050] In summary, the new high-salt mine drainage water desalination process system of the utility model makes full use of the waste heat of steam turbine exhaust steam, and adopts thermal seawater desalination technology MED technology to desalinate mine drainage water; the required steam parameters are relatively low, which can match the exhaust parameters of air-cooled steam turbines, thereby making full use of the waste heat of exhaust steam, saving energy and reducing consumption while effectively reducing the cost of water production; reducing the discharge of concentrated brine, reaching or exceeding the secondary reverse osmosis concentration multiple; it can be used as industrial water or domestic water standards, and then after treatment, it can reach the production water standard of power plants and be reused in the power plant process system; this technology of desalinating mine water with air-cooled exhaust steam saves water resources and realizes energy cascade utilization. It is a typical "two wastes into one treasure" and has the advantages of low operating temperature, not easy to scale, complex technology but simple operation.

Claims

1. A new high-salinity mine drainage water desalination process system, characterized in that: It includes an evaporator (1), a condenser (2), a steam system, a mine drainage water system, a finished water system, a concentrated brine system, a condensate and desuperheated water system, and a vacuum system; The evaporator (1) comprises a first effect evaporator, a second effect evaporator and a third effect evaporator which are connected in sequence from the gas input end to the gas output end thereof, and the gas output end of the evaporator (1) is connected to the gas input end of the condenser (2); the first effect evaporator, the second effect evaporator and the third effect evaporator are all provided with a spray head; The steam system comprises a steam turbine exhaust steam pipeline (3) and a steam turbine extraction steam pipeline (4); the output end of the steam turbine exhaust steam pipeline (3) is connected to the gas input end of the evaporator (1); the output end of the steam turbine extraction steam pipeline (4) is connected to the gas input end of the evaporator (1) after passing through a steam ejector (5) and a temperature reducing device (6) in sequence; The mine drainage water system comprises a drainage water pipeline (7), wherein the drainage water pipeline (7) is provided with a drainage water booster pump (8); the output end of the drainage water pipeline (7) is connected to the liquid input end of the condenser (2), and the liquid output end of the condenser (2) is connected to the spray head of the evaporator (1); three branch pipelines connected in parallel are formed between the drainage water booster pump (8) and the condenser (2), wherein the first branch pipeline is connected to a finished water cooler (9), and the second branch pipeline is connected to a brine heater (10); The finished water system comprises a finished water external supply pipeline (11), wherein the finished water external supply pipeline (11) is provided with a finished water cooler (9) and a finished water pump (12); the finished water external supply pipeline (11) is connected to the second effect evaporator, the third effect evaporator and / or the condenser (2); The concentrated brine system comprises a brine discharge pipeline (13), wherein the brine discharge pipeline (13) is provided with a brine heater (10) and a brine discharge pump (14); the brine discharge pipeline (13) is connected to the evaporator (1); The condensate and desuperheating water system comprises a return condensate pipeline, in which a condensate pump (15) is provided; the return condensate pipeline is arranged in the first-effect evaporator, and the return condensate pipeline is connected to the unit condensate system (24) and / or the desuperheating device (6); The vacuum system comprises a vacuum pipeline, in which a water ring vacuum pump (16) is provided; the vacuum pipeline is connected to an evaporator (1) and / or a condenser (2).

2. The novel high-salt mine drainage water desalination process system according to claim 1 is characterized in that: The arrangement height of the condenser (2) is higher than that of the evaporator (1). The third-effect evaporator has a hot well (17) on the side close to the condenser (2). The input end of the finished water external supply pipeline (11) is only connected to the lower end of the hot well (17).

3. The novel high-salt mine drainage water desalination process system according to claim 2 is characterized in that: The finished water pump (12) is located between the hot well (17) and the finished water cooler (9).

4. The novel high-salt mine drainage water desalination process system according to claim 1 is characterized in that: The third-effect evaporator has a mine water side salt water well (18) on the side close to the condenser (2), and the input end of the salt water discharge pipeline (13) is only connected to the lower end of the mine water side salt water well (18).

5. The novel high-salt mine drainage water desalination process system according to claim 2 is characterized in that: The third-effect evaporator has a mine water side salt water well (18) on the side close to the condenser (2), and the input end of the salt water discharge pipeline (13) is only connected to the lower end of the mine water side salt water well (18); the hot well (17) is located between the mine water side salt water well (18) and the condenser (2).

6. The novel high-salt mine drainage water desalination process system according to claim 1 is characterized in that: A first concentrated brine recirculation pipeline is connected to the bottom of the first-effect evaporator, a first-effect drain pump (19) is provided in the first concentrated brine recirculation pipeline, and the other end of the first concentrated brine recirculation pipeline is connected to the pipeline between the condenser (2) and the spray head; A second concentrated brine recirculation pipeline is connected to the bottom of the second-effect evaporator, a second-effect drain pump (20) is provided in the second concentrated brine recirculation pipeline, and the other end of the second concentrated brine recirculation pipeline is connected to the pipeline between the condenser (2) and the spray head.

7. The novel high-salt mine drainage water desalination process system according to claim 1 is characterized in that: The first-effect evaporator is provided with a first-effect non-condensable gas extraction port (21); the third-effect evaporator is provided with a third-effect non-condensable gas discharge port (23) and is connected to the condenser (2) through a pipeline; the condenser (2) is provided with a terminal non-condensable gas discharge port (22); and the water ring vacuum pump (16) is connected to the first-effect non-condensable gas extraction port (21) and the terminal non-condensable gas discharge port (22) through a vacuum pipeline.

8. The novel high-salt mine drainage water desalination process system according to any one of claims 1 to 7, characterized in that: A gas circulation pipeline is connected to the top of the third effect evaporator on one side close to the condenser (2), and the gas circulation pipeline is connected to the steam ejector (5).

9. The novel high-salt mine drainage water desalination process system according to any one of claims 1 to 7, characterized in that: The steam ejector (5) is a TVC ejector.

10. The novel high-salt mine drainage water desalination process system according to any one of claims 1 to 7, characterized in that: The temperature reduction device (6) comprises a temperature reduction spray head arranged opposite to the steam ejector (5).

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