Salt deposition prevention device for brine mining well and brine mining well structure

Abstract

The utility model provides a brine well salt deposition prevention device and a brine well structure. The salt deposition prevention device for the brine extraction well comprises a mixing structure and a salt deposition prevention structure, the mixing structure is provided with a closed inner cavity and a liquid inlet communicated with the inner cavity, a one-way valve is arranged at the liquid inlet, and a water outlet of the one-way valve faces the inner cavity; the liquid inlet end of the liquid conveying pipeline is configured to be communicated with an external liquid supply device, the liquid outlet end of the liquid conveying pipeline is communicated with the inner cavity, and the liquid outlet end of the liquid conveying pipeline is in sealing fit with the joint of the mixing structure; the conveying pump is mounted in the inner cavity; the liquid inlet end of the liquid discharging pipeline is communicated with the liquid outlet end of the conveying pump. According to the technical scheme, the salt deposition prevention device for the brine mining well can solve the problem that a large-area well wall cavity is formed due to the fact that a chipping layer and a salt layer are possibly dissolved when an existing salt deposition prevention method is adopted.

Description

Technical Field

[0001] The utility model relates to the technical field of brine mining, and in particular to a brine mining well anti-salting device and a brine mining well structure. Background Art

[0002] In the process of salt lake resource development, the rational exploitation and utilization of brine is of great significance to improving the economic benefits of resources. However, in the actual mining process, brine in some areas aggregates into blocks due to serious salt formation problems, forming salt scale. This phenomenon not only blocks the pore channels for brine circulation, but also may form salt to a blocked state within 72 hours, seriously affecting the efficiency and safety of brine mining. Research on the mechanism of well wall salt formation shows that supersaturation is the direct phase change driving force for the formation of salt precipitation crystal nuclei and is a key prerequisite for scale formation. The mineralization of salt-forming brine in the Bieltan area is generally between 300g / L and 330g / L, of which the sodium content is between 40g / L and 110g / L. It belongs to the type of high-sodium and low-potassium salt water. The brine is in the middle stage of the salt precipitation stage, and the salt crystallization process is very vigorous. When the mineralization is between 300g / L and 330g / L, the precipitation of NaCl accounts for 80% of the total salt precipitation. Therefore, whether the mineralization is within the salt-forming range is an important condition for judging whether the brine is salt-forming. When the mineralization of the brine is lower than 300g / L or higher than 330g / L, although there is a small amount of NaCl crystallization, it will not form a thick scaling layer and has little effect on normal brine mining.

[0003] In order to solve the problem of brine salting on the well wall, the current method for preventing salting in salt lake brine wells mainly adopts water-mixing desalination technology. For example, patent CN220909664U proposes a method of pre-burying multiple longitudinal water pipes and annular transverse spray pipes in the well wall to prevent salting by injecting fresh water from the ground. In addition, patent CN218669758U designs a water spraying device that can slide up and down to evenly spray fresh water around the brine pump and the well wall to solve the impact of salting on brine mining. Patents CN101476557B, CN207195217U and CN104196498A also install fresh water pipelines in the water inlet section of the pump, so that the salt at the impeller and flow channel can be dissolved or lose adhesion by fresh water, and finally discharged together with the collected brine, so as to achieve the anti-salting of the brine pump. Although brine dilution can prevent salting to a certain extent, this method has obvious shortcomings. First, there is a large density difference between fresh water and high-concentration brine, which results in that most of the fresh water pipes pre-buried in the well wall or the fresh water sprayed evenly cannot be mixed evenly with the brine due to the density difference, but quickly drift to the upper layer and gather. Under the immersion of the "fresh water" drifting to the upper layer, the soil structure of the debris layer will become unstable or even collapse, and the salt layer will be dissolved to form a large area of ​​well wall cavity. If not handled in time, it may even cause the overall collapse of the brine well, causing serious economic losses and safety hazards. Utility Model Content

[0004] The main purpose of the present utility model is to provide a salt - prevention device for brine - extraction wells and a brine - extraction well structure, which can solve the problem that the use of existing salt - prevention methods causes the debris layer and the salt layer to be dissolved, forming large - area cavity on the well wall.

[0005] To achieve the above object, according to one aspect of the present utility model, there is provided a salt - prevention device for brine - extraction wells, including: a mixing structure having a sealed inner cavity and a liquid inlet communicating with the inner cavity, a check valve is provided at the liquid inlet, and the water outlet of the check valve faces the inner cavity; an infusion pipeline, the liquid inlet end of the infusion pipeline is configured to communicate with an external liquid - supply device, the liquid outlet end of the infusion pipeline communicates with the inner cavity, and the connection between the liquid outlet end of the infusion pipeline and the mixing structure is in sealing fit; a delivery pump installed in the inner cavity; and a drain pipeline, the liquid inlet end of the drain pipeline communicates with the liquid outlet end of the delivery pump.

[0006] Further, the liquid inlet end of the delivery pump has a first preset distance L1 from the bottom wall of the mixing structure, and the liquid inlet end of the delivery pump has a second preset distance L2 from the top wall of the mixing structure, where the value range of L1 is 3m ≤ L1 ≤ 4m, and the value range of L2 is 10m ≤ L2 ≤ 11m.

[0007] Further, the salt - prevention device for brine - extraction wells further includes a salinity detection device, and the salinity detection device is arranged at the bottom of the mixing structure.

[0008] Further, the salt - prevention device for brine - extraction wells further includes a control system and an infusion main pipeline, the liquid inlet end of the infusion main pipeline is configured to be connected to an external liquid - supply device, the liquid outlet end of the infusion main pipeline communicates with the liquid inlet end of the infusion pipeline, a switch valve is arranged on the infusion main pipeline, and the check valve, the salinity detection device and the switch valve are all in communication connection with the control system.

[0009] Further, a pressurizing device is also arranged on the infusion main pipeline.

[0010] Further, a first flowmeter is also arranged on the infusion main pipeline, and the first flowmeter is in communication connection with the control system.

[0011] Further, the liquid outlet end of the infusion pipeline is provided with a plurality of branch pipelines, and the plurality of branch pipelines are arranged at intervals in the vertical direction.

[0012] Further, there are at least two infusion pipelines, and the at least two infusion pipelines are arranged at intervals along the circumferential direction of the mixing structure.

[0013] According to another aspect of the present utility model, there is provided a brine - extraction well structure, including: the above - mentioned salt - prevention device for brine - extraction wells; a vertical well, a liquid - passing pipe is arranged in the inner cavity of the vertical well, a plurality of through - holes are arranged on the side wall of the liquid - passing pipe, and the mixing structure is arranged in the inner cavity of the liquid - passing pipe.

[0014] Furthermore, gravel is filled between the inner wall of the vertical well and the outer wall of the liquid passing pipe, and the particle size of the gravel is larger than the diameter of the through hole.

[0015] Applying the technical solution of the present utility model, there are provided a mixing structure, a liquid delivery pipeline, a delivery pump, and a liquid discharge pipeline. During brine extraction, the delivery pump is started, and the delivery pump pumps the brine in the brine extraction well into the inner cavity of the mixing structure, and fresh water is delivered to the inner cavity of the mixing structure through the liquid delivery pipeline. The fresh water and the brine are mixed in the closed inner cavity. The addition of fresh water can dilute the brine and avoid salt crystallization. Since the inner cavity of the mixing structure is closed, the fresh water entering the inner cavity of the mixing structure cannot flow back to the brine extraction well and can only be discharged through the delivery pump via the liquid discharge pipeline. In this way, it is possible to avoid the problem that due to the density difference between fresh water and brine, the two are not evenly mixed, causing the fresh water to quickly float to the upper layer and accumulate, soaking and dissolving the debris layer and salt layer on the well wall of the brine extraction well, and further avoiding the formation of large-area well wall cavities, thereby improving the safety of the well structure of the brine extraction well, extending the service life of the brine extraction well, and preventing the overall collapse of the brine extraction well. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The attached drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the attached

[0017] In the drawings:

[0018] Figure 1 The structural schematic diagram of the brine extraction well structure of the embodiment of the present utility model is shown.

[0019] Among them, the above-mentioned attached drawings include the following reference numerals:

[0020] 10. Mixing structure; 11. Liquid inlet; 20. Liquid delivery pipeline; 21. Switch valve; 22. Branch pipeline; 23. First flowmeter; 24. Liquid delivery main pipe; 30. Delivery pump; 40. Liquid discharge pipeline; 41. Second flowmeter; 50. Salinity detection device; 60. Control system; 70. Booster device; 80. Vertical well; 90. Liquid passing pipe; 91. Through hole; 100. Gravel; 101. First aquifer; 102. Second aquifer; 103. Third aquifer; 104. Fourth aquifer; 105. First debris layer; 106. Second debris layer; 107. Third debris layer; 108. Fourth debris layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the attached drawings and in combination with the embodiments.

[0022] AsFigure 1 As shown, the groundwater in the Bieletan Salt Lake is generally divided into four aquifers, namely the first aquifer 101, the second aquifer 102, the third aquifer 103, and the fourth aquifer 104. There is a first detrital layer 105 below the first aquifer 101, a second detrital layer 106 between the first aquifer 101 and the second aquifer 102, a third detrital layer 107 between the second aquifer 102 and the third aquifer 103, and a fourth detrital layer 108 between the third aquifer 103 and the fourth aquifer 104. The brine mainly exists in the intercrystalline spaces of halite in the aquifers and the pore spaces of sand layers in the detrital layers. The detrital layer (including the sand layer) is a kind of cohesive soil containing a large amount of easily soluble salts and in a soft plastic or fluid plastic state. During the brine extraction process, there is a density difference between fresh water and brine, and the fresh water is prone to floating to the surface of the brine. At this time, the detrital layer will be soaked by fresh water and is prone to instability and collapse, and the salt layer is easily dissolved by "fresh water" to form large cavities.

[0023] To solve the above problems, as Figure 1 shown, the present utility model provides a salt anti - caking device for a brine extraction well. The salt anti - caking device for a brine extraction well includes: a mixing structure 10, having a closed inner cavity and a liquid inlet 11 communicating with the inner cavity. A check valve is provided at the liquid inlet 11, and the water outlet of the check valve faces the inner cavity; an infusion pipeline 20, the liquid inlet end of the infusion pipeline 20 is configured to communicate with an external liquid supply device, the liquid outlet end of the infusion pipeline 20 communicates with the inner cavity, and the connection between the liquid outlet end of the infusion pipeline 20 and the mixing structure 10 is in sealed cooperation; a transfer pump 30, installed in the inner cavity; and a drain pipeline 40, the liquid inlet end of the drain pipeline 40 communicates with the liquid outlet end of the transfer pump 30.

[0024] In this embodiment, the mixing structure 10 is installed in the brine extraction well. The inner cavity of the mixing structure 10 is closed. A check valve is provided at the liquid inlet 11. The check valve allows external liquid to enter the inner cavity of the mixing structure 10, while the liquid in the inner cavity of the mixing structure 10 cannot flow out of the inner cavity. The infusion pipeline 20 is used to transport fresh water, and the drain pipeline 40 is used to transport the liquid in the inner cavity of the mixing structure 10 to the outside.

[0025] During brine extraction, the transfer pump 30 is started. The transfer pump 30 pumps the brine in the brine extraction well into the inner cavity of the mixing structure 10, and fresh water is conveyed to the inner cavity of the mixing structure 10 through the liquid delivery pipeline 20. The fresh water and the brine are mixed in the closed inner cavity. The addition of fresh water can dilute the brine and prevent salt crystallization. In addition, since the inner cavity of the mixing structure 10 is closed, the fresh water entering the inner cavity of the mixing structure 10 cannot flow back to the brine extraction well and can only be discharged through the transfer pump via the liquid discharge pipeline. In this way, it is possible to avoid the problem that due to the density difference between fresh water and brine, the two are not evenly mixed, resulting in the rapid floating of fresh water to the upper layer and accumulating, soaking and dissolving the debris layer and salt layer on the well wall of the brine extraction well, and the formation of large-area well wall cavities can be avoided. Furthermore, the safety of the wellbore structure of the brine extraction well can be improved, the service life of the brine extraction well can be extended, and the overall collapse of the brine extraction well can be avoided.

[0026] In one embodiment, the mixing structure 10 is a box.

[0027] As Figure 1 shown, in one embodiment of the present utility model, the liquid inlet end of the transfer pump 30 has a first preset distance L1 from the bottom wall of the mixing structure 10, and the liquid inlet end of the transfer pump 30 has a second preset distance L2 from the top wall of the mixing structure 10. Among them, the value range of L1 is 3m ≤ L1 ≤ 4m, and the value range of L2 is 10m ≤ L2 ≤ 11m.

[0028] In this embodiment, the inner cavity of the mixing structure 10 can cover the area 8m - 10m above and 2m - 3m below the liquid inlet end of the transfer pump 30. Fresh water is conveyed into the inner cavity of the mixing structure 10 through the liquid delivery pipeline 20 to dilute the brine in the inner cavity of the mixing structure 10, and thus the probability of salt crystallization in the area with the most serious salt crystallization near the liquid inlet end of the transfer pump 30 can be reduced.

[0029] It should be noted that the brine disturbance condition is an important factor affecting salt crystallization. During the brine extraction process, a high-speed moving flow field will be formed in the areas above and below the liquid inlet end of the transfer pump 30. The fluid movement accelerates the crystal collision growth, making the areas 2m - 3m below the liquid inlet end of the transfer pump 30 and 8m - 10m above the liquid inlet end of the transfer pump 30 the areas with the most serious salt crystallization.

[0030] As Figure 1 shown, in one embodiment of the present utility model, the anti-salt crystallization device for the brine extraction well further includes a salinity detection device 50, and the salinity detection device 50 is arranged at the bottom of the mixing structure 10.

[0031] In this embodiment, the salinity detection device 50 is arranged at the bottom of the mixing structure 10 and is located in the inner cavity of the mixing structure 10 for real-time detection of the salinity of the liquid in the inner cavity of the mixing structure 10.

[0032] AsFigure 1 As shown, in one embodiment of the present utility model, the salt - scale prevention device for brine extraction wells further includes a control system 60 and a main liquid delivery pipe 24. The liquid inlet end of the main liquid delivery pipe 24 is configured to be connected to an external liquid supply device. The liquid outlet end of the main liquid delivery pipe 24 is communicated with the liquid inlet end of the liquid delivery pipeline 20. A switching valve 21 is provided on the main liquid delivery pipe 24, and the one - way valve, the salinity detection device 50 and the switching valve 21 are all in communication connection with the control system 60.

[0033] In this embodiment, the main liquid delivery pipe 24 is connected to an external liquid supply device. The external liquid supply device is used to supply fresh water. The fresh water is transported through the main liquid delivery pipe 24 to the liquid delivery pipeline 20, and then through the liquid delivery pipeline 20 to the inner cavity of the mixing structure 10. A switching valve 21 is provided on the main liquid delivery pipe 24 to control the on - off of the connection between the main liquid delivery pipe 24 and the external liquid supply device. The one - way valve, the salinity detection device 50 and the switching valve 21 are all in communication connection with the control system 60. In this way, the control system 60 can control the start - stop of the one - way valve and the switching valve 21. After the control system 60 obtains the salinity result measured by the salinity detection device 50, it controls the start - stop of the switching valve 21 according to the salinity detection result. When the salinity detection result is lower than 300 g / L or higher than 330 g / L, the control system 60 controls the switching valve 21 and the one - way valve to close, stopping the continuous addition of fresh water to the inner cavity of the mixing structure 10 and stopping the continuous extraction of brine. Through the above - mentioned arrangement, both crystallization can be avoided and the waste of fresh water resources can be avoided.

[0034] It should be noted that the brine salinity is negatively correlated with the + content of Na, and shows an exponential decrease. When the brine salinity reaches 300 g / L - 330 g / L, a large amount of halite precipitates from the brine. In this stage, the amount of halite precipitation accounts for 80% of the entire halite precipitation section, and the + content of Na rapidly drops from 110 g / L to 20 g / L. When the brine salinity is lower than 300 g / L or higher than 330 g / L, there is a small amount of NaCl crystallization in the brine, but no thick scaling layer will be formed, which does not affect normal brine extraction.

[0035] As Figure 1 shown, in one embodiment of the present utility model, a pressurizing device 70 is further provided on the main liquid delivery pipe 24.

[0036] In this embodiment, a pressurizing device 70 is further provided on the main liquid delivery pipe 24 to increase the pressure of fresh water and ensure that the fresh water can be smoothly transported to the liquid delivery pipeline 20.

[0037] In one embodiment, the pressurizing device 70 is a booster pump. The salt - scale prevention device for brine extraction wells further includes a stirring device. The stirring device is installed in the inner cavity of the mixing structure 10 and can stir the liquid in the inner cavity of the mixing structure 10.

[0038] In one embodiment, the stirring device is a paddle stirrer. The brine and fresh water in the inner cavity of the mixing structure 10 are fully mixed under the combined action of the pressure of the vacuum cone flow field formed by the brine pumping of the transfer pump 30, the stirring action of the paddle stirrer, and the inertial force of the fresh water flowing into the inner cavity of the mixing structure 10 after being pressurized by the booster pump, so that the mixed brine is evenly diluted to the critical value of salt crystallization, inhibiting the precipitation of halite crystals. Through the above settings, salt crystallization can be effectively avoided, and the anti-salt crystallization effect can be improved.

[0039] As Figure 1 shown, in one embodiment of the present utility model, a first flowmeter 23 is further provided on the infusion main pipe 24, and the first flowmeter 23 is communicatively connected to the control system 60.

[0040] In this embodiment, a first flowmeter 23 is provided on the infusion main pipe 24 for real-time monitoring of the flow rate of fresh water in the infusion main pipe 24.

[0041] In one embodiment, a second flowmeter 41 is provided on the liquid discharge pipeline 40 for real-time monitoring of the flow rate of the brine in the liquid discharge pipeline 40.

[0042] In one embodiment, both the first flowmeter 23 and the second flowmeter 41 are electromagnetic flowmeters.

[0043] In one embodiment, the control system 60 includes a terminal control component and an RTU (Remote Terminal Unit). The terminal control component includes a communication relay and an intermediate relay. The communication relay is electrically connected to the RTU, and the intermediate relay is electrically connected to the communication relay, the salinity detection device 50, the one-way valve, the first flowmeter 23, the second flowmeter 41, and the on-off valve 21. Through the above settings, the control system 60 can control the start and stop of the salinity detection device 50, the one-way valve, the first flowmeter 23, the second flowmeter 41, and the on-off valve 21.

[0044] In one embodiment, the RTU can control the start and stop of the salinity detection device 50, the one-way valve, the first flowmeter 23, the second flowmeter 41, and the on-off valve 21 in real time, or a preset time can be set to achieve intermittent start and stop.

[0045] In one embodiment, the communication relay is an RS485 type relay.

[0046] In the prior art, the timing of adding fresh water, the amount of added water, and the continuous addition time all rely on the staff to observe the attenuation and recovery of the brine extraction flow rate and make decisions based on experience. However, there are significant differences in the salt crystallization conditions of different brine extraction wells, and manual desalination is blind. For example, if too much fresh water is added, the content of the brine will be reduced, affecting the quality of the original brine; spraying fresh water in layers where there is no salt crystallization or the salt crystallization is not serious will not only cause waste of fresh water but also cause significant damage to the brine quality and the integrity of the wellbore.

[0047] To solve the above problems, in one embodiment, the control system 60 further includes a data transmission terminal and a monitoring center computer server. The monitoring center computer server is communicatively connected to the RTU through the data transmission terminal. The data transmission terminal transmits the on-site data collected by the RTU via the communication relay to the monitoring center computer server. The monitoring center computer server can further save and process the data, and can also remotely send control instructions to the RTU through the data transmission terminal, and remotely control the salinity detection device 50, the one-way valve, the first flowmeter 23, the second flowmeter 41, and the switching valve 21 through the RTU and the communication relay electrically connected to the RTU.

[0048] It should be noted that the data transmission terminal and the monitoring center computer server can adopt the prior art, and the specific structure will not be elaborated here.

[0049] Specifically, the salinity detection device 50, the first flowmeter 23, and the second flowmeter 41 transmit the collected data to the monitoring center computer server through the communication relay, the RTU, and the data transmission terminal. The monitoring center computer server performs data interaction and comparison in combination with the cloud server, and according to the preset salt crystallization conditions: (1) if the value of the second flowmeter 41 is less than the normal value (the normal value refers to the value of the second flowmeter 41 in the case of no salt crystallization); (2) the salinity of the brine is between 300 g / L and 330 g / L, and the content of Na + is between 40 g / L and 110 g / L; based on the above conditions, it judges and warns whether the brine is salt crystallized and the severity of salt crystallization, and simulates and calculates the accurate total amount of fresh water to be added and the continuous addition time of fresh water according to the salinity of the brine and the content of Na+. When the monitoring center computer server finds that parameters such as the salt crystallization amount and the salt crystallization rate exceed or approach the preset safety threshold, the monitoring center computer server sends a start instruction to the one-way valve and the switching valve 21 through the data transmission terminal, the RTU, and the communication relay, and adjusts the switching valve 21 and the one-way valve according to the total amount of fresh water to be added and the amount of "fresh" brine required to fill the inner cavity of the mixing structure, so that the "fresh" brine is poured into the inner cavity of the mixing structure 10.

[0050] As described above, the monitoring center computer server has an intelligent early warning calculation function. According to preset conditions, it can simulate and calculate the accurate fresh water addition amount, the continuous fresh water addition time, and the "fresh" brine filling amount corresponding to the critical salt formation. This can avoid the reduction of brine quality caused by excessive fresh water input. At the same time, the monitoring center computer server can also issue instructions to accurately convey fresh water to the inner cavity of the mixing structure 10 to fully mix and dilute the brine, effectively avoiding salt formation, with a good salt prevention effect, realizing precise management of salt removal in the brine extraction well, improving the production efficiency of the brine extraction well, and extending the service life of the brine extraction well.

[0051] As Figure 1 shown, in an embodiment of the present invention, the liquid outlet end of the infusion pipeline 20 is provided with a plurality of branch pipelines 22, and the plurality of branch pipelines 22 are arranged at intervals in the vertical direction.

[0052] Through the above settings, it is possible to add fresh water to the inner cavity of the mixing structure 10 from different positions, which is beneficial to the mixing of fresh water and the brine in the inner cavity of the mixing structure 10.

[0053] As Figure 1 shown, in an embodiment of the present invention, there are at least two infusion pipelines 20, and the at least two infusion pipelines 20 are arranged at intervals along the circumferential direction of the mixing structure 10.

[0054] Through the above settings, the conveying rate of fresh water can be improved.

[0055] According to another aspect of the present invention, there is provided a brine extraction well structure, including: the above-mentioned brine extraction well anti-salt formation device; a vertical well 80, in the inner cavity of the vertical well 80, there is a liquid passing pipe 90, and a plurality of through holes 91 are provided on the side wall of the liquid passing pipe 90, and the mixing structure 10 is arranged in the inner cavity of the liquid passing pipe 90.

[0056] In this embodiment, the liquid passing pipe 90 is arranged in the inner cavity of the vertical well 80, and a plurality of through holes 91 are provided on the side wall of the liquid passing pipe 90, and the brine can enter the inner cavity of the liquid passing pipe 90 through the through holes 91. The brine extraction well anti-salt formation device of the brine extraction well structure has all the technical solutions and all the technical effects of the above-mentioned brine extraction well anti-salt formation device, which will not be elaborated here.

[0057] As Figure 1 shown, in an embodiment of the present invention, gravel 100 is filled between the inner wall of the vertical well 80 and the outer wall of the liquid passing pipe 90, and the particle size of the gravel 100 is larger than the diameter of the through holes 91.

[0058] In this embodiment, the particle size of the gravel 100 is larger than the diameter of the through holes 91, preventing the gravel 100 from entering the inner cavity of the liquid passing pipe 90.

[0059] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: It is provided with a mixing structure, an infusion pipeline, a delivery pump, and a drainage pipeline. When extracting brine, the delivery pump is started, and the delivery pump pumps the brine in the brine extraction well into the inner cavity of the mixing structure. Fresh water is conveyed into the inner cavity of the mixing structure through the infusion pipeline. The fresh water and the brine are mixed in the closed inner cavity. The addition of fresh water can dilute the brine and avoid salt crystallization. Since the inner cavity of the mixing structure is closed, the fresh water entering the inner cavity of the mixing structure cannot flow back to the brine extraction well and can only be discharged through the delivery pump via the drainage pipeline. In this way, it can avoid the problem that due to the density difference between fresh water and brine, the two are not evenly mixed, resulting in the rapid floating of fresh water to the upper layer and accumulation, soaking and dissolving the debris layer and salt layer on the well wall of the brine extraction well, and further avoid the formation of large-area well wall cavities, thereby improving the safety of the wellbore structure of the brine extraction well, extending the service life of the brine extraction well, and preventing the overall collapse of the brine extraction well.

[0060] Obviously, the above-described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0061] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0062] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A brine well anti-salting device, characterized in that: include: A mixing structure (10) having a sealed inner cavity and a liquid inlet (11) connected to the inner cavity, wherein a one-way valve is provided at the liquid inlet (11), and a water outlet of the one-way valve faces the inner cavity; an infusion line (20), wherein the liquid inlet end of the infusion line (20) is configured to communicate with an external liquid supply device, the liquid outlet end of the infusion line (20) is communicated with the inner cavity, and the liquid outlet end of the infusion line (20) is sealed and matched with a connection point of the mixing structure (10); A delivery pump (30) installed in the inner cavity; as well as A liquid discharge pipeline (40), wherein the liquid inlet end of the liquid discharge pipeline (40) is connected to the liquid outlet end of the delivery pump (30).

2. The device for preventing salt accumulation in brine wells according to claim 1, characterized in that: The liquid inlet end of the delivery pump (30) and the bottom wall of the mixing structure (10) have a first preset distance L1, and the liquid inlet end of the delivery pump (30) and the top wall of the mixing structure (10) have a second preset distance L2, wherein the value range of L1 is 3m≤L1≤4m, and the value range of L2 is 10m≤L2≤11m.

3. The device for preventing salt accumulation in brine wells according to claim 1, characterized in that: The brine well anti-salting device further comprises a mineralization detection device (50), and the mineralization detection device (50) is arranged at the bottom of the mixing structure (10).

4. The device for preventing salt accumulation in brine wells according to claim 3, characterized in that: The brine well anti-salting device also includes a control system (60) and a main infusion pipe (24). The liquid inlet end of the main infusion pipe (24) is constructed to be connected to the external liquid supply device, and the liquid outlet end of the main infusion pipe (24) is connected to the liquid inlet end of the infusion pipeline (20). A switch valve (21) is provided on the main infusion pipe (24), and the one-way valve, the mineralization detection device (50) and the switch valve (21) are all communicatively connected to the control system (60).

5. The device for preventing salt accumulation in brine wells according to claim 4, characterized in that: The main infusion pipe (24) is also provided with a pressure boosting device (70).

6. The device for preventing salt accumulation in brine wells according to claim 4, characterized in that: The main infusion pipe (24) is also provided with a first flow meter (23), and the first flow meter (23) is communicatively connected with the control system (60).

7. The device for preventing salt accumulation in brine wells according to claim 1, characterized in that: The liquid outlet end of the infusion pipeline (20) is provided with a plurality of branch pipelines (22), and the plurality of branch pipelines (22) are arranged at intervals in the vertical direction.

8. The device for preventing salt accumulation in brine wells according to any one of claims 1 to 7, characterized in that: There are at least two infusion pipelines (20), and the at least two infusion pipelines (20) are arranged at intervals along the circumference of the mixing structure (10).

9. A brine mining well structure, characterized in that: include: The device for preventing salt accumulation in brine wells according to any one of claims 1 to 8; A vertical well (80), wherein a liquid passage pipe (90) is arranged in the inner cavity of the vertical well (80), a plurality of through holes (91) are arranged on the side wall of the liquid passage pipe (90), and the mixing structure (10) is arranged in the inner cavity of the liquid passage pipe (90).

10. The brine mining well structure according to claim 9, characterized in that: Gravel (100) is filled between the inner wall of the vertical well (80) and the outer wall of the liquid passage pipe (90), and the particle size of the gravel (100) is larger than the diameter of the through hole (91).

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