Crystal mush thickener

Abstract

The utility model discloses a crystal mush thickener which comprises a barrel, the barrel is hollow and comprises a straight barrel section and a settling section, the settling section is used for storing first feed liquid, the peripheral side of the settling section is connected with a plurality of elutriation pipes, the plurality of elutriation pipes are arranged at intervals along the peripheral side of the settling section, the plurality of elutriation pipes are in a normally open state, and the plurality of elutriation pipes are connected with the barrel. Each elutriation pipe is communicated with the settling section, a flowmeter is arranged on each elutriation pipe, each elutriation pipe is used for inputting second feed liquid into the settling section, the flowmeter is used for measuring the flow of the second feed liquid, and the concentration of part of liquid in the second feed liquid is lower than that of the same liquid in the first feed liquid; the first feed liquid is elutriated by the second feed liquid to form target feed liquid. The elutriating device can be used for elutriating at the settling section, so that the purity of target feed liquid is improved.

Description

Technical Field

[0001] The utility model relates to the field of centrifuges, and particularly relates to a crystal slurry thickener. Background Art

[0002] Double-stage piston push-feed centrifuges, horizontal spiral / screen filtration centrifuges, etc., which are commonly used for solid-liquid centrifugal separation of crystal slurries, have requirements for the feed concentration of crystal slurries, crystal particle size, and feed stability, and these are mainly achieved by a crystal slurry thickener.

[0003] For the pipeline transportation of salt crystal slurries, anti-blocking needs to be considered, and there are certain requirements for the solid-liquid ratio of the feed. The lower the solid-liquid ratio of the feed, the larger the centrifuge required, and the higher the investment cost of the centrifuge. Therefore, the crystal slurry needs to be thickened by a thickener first and then enter the centrifuge. The crystal slurry is transported into the thickener, and the crystals slowly settle in the thickener, and thickening is achieved in the middle and lower parts of the thickener. The clear liquid clarified in the upper part of the thickener overflows from the thickener to achieve crystal slurry thickening.

[0004] At present, a flushing pipe is provided in the settling section of the thickener, and the flushing pipe is periodically opened to prevent blockage in the settling section, but it does not improve the purity of the crystals. That is to say, the current thickener only sets flushing and anti-blocking in the settling section, and does not set a special elutriation process to improve the purity of the crystals. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problem that the current thickener only sets flushing and anti-blocking in the settling section and does not set a special elutriation process to improve the purity of the crystals. The utility model provides a crystal slurry thickener, which can perform elutriation in the settling section to improve the purity of the target liquid.

[0006] To solve the above technical problems, an embodiment of the utility model discloses a crystal slurry thickener, which includes:

[0007] A cylinder body, the interior of the cylinder body is hollow, including a straight cylinder section and a settling section, wherein,

[0008] The settling section is used for storing a first liquid, a plurality of elutriation pipes are connected to the outer peripheral side of the settling section, the plurality of elutriation pipes are arranged at intervals along the outer peripheral side of the settling section, the plurality of elutriation pipes are in an always-open state, each elutriation pipe is communicated with the settling section, a flow meter is provided on each elutriation pipe, each elutriation pipe is used for inputting a second liquid into the settling section, the flow meter is used for measuring the flow rate of the second liquid, the concentration of some liquid in the second liquid is lower than the concentration of the same liquid in the first liquid, and the first liquid is elutriated by the second liquid to form a target liquid.

[0009] With the above technical solution, by connecting a plurality of elutriation tubes to the outer peripheral side of the sedimentation section and arranging the plurality of elutriation tubes at intervals, it is ensured that the first feed liquid in the sedimentation section is elutriated sufficiently and evenly. At the same time, the elutriation tubes convey the second feed liquid to the sedimentation section. The concentration of some liquid in the second feed liquid is lower than the concentration of the same liquid in the first feed liquid. It is ensured that when the second feed liquid is conveyed to the sedimentation section, the liquid in the first feed liquid in the sedimentation section can be replaced, that is, replaced into the second feed liquid, so as to reduce the concentration of the liquid in the first feed liquid, achieve the purification of the target liquid in the first feed liquid, and ensure the purity of the target feed liquid.

[0010] At the same time, a flow meter is provided on each elutriation tube, which can record the flow rate of the second feed liquid, ensure that the flow rate of the second feed liquid is appropriate, so that the first feed liquid can be kept tumbling, without bridging phenomenon, and does not affect the concentration of the target liquid in the first feed liquid.

[0011] For easy understanding, in this embodiment, the first feed liquid is taken as an example containing 24.2% sodium chloride and 1.2% sodium sulfate. Among them, sodium sulfate is one of the impurities to be removed (of course, it can be understood that the first feed liquid also contains other media, but since the concentration of other media is relatively low, it can be ignored. This example is only for easy understanding and does not affect the protection scope of this embodiment). The second feed liquid introduced is 26.6% sodium chloride and 0.6% sodium sulfate. The concentration of sodium sulfate in the first feed liquid is higher than that in the second feed liquid, and the concentration of sodium sulfate in the second feed liquid is lower than the saturation concentration. Therefore, when the second feed liquid is mixed with the first feed liquid, the sodium sulfate in the first feed liquid can be replaced into the second feed liquid, so that the concentration of sodium sulfate in the first feed liquid is reduced, that is, the concentration of impurities in the first feed liquid is reduced, thereby ensuring the concentration of sodium chloride in the first feed liquid and ensuring the purity of the target feed liquid.

[0012] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a crystal slurry thickener. A plurality of flushing tubes are provided at the connection between the straight tube section and the sedimentation section. One end of each flushing tube is communicated with the connection, and the other end is connected to a straight tube. The straight tube extends axially and is used for introducing flushing substances.

[0013] With the above technical solution, crystal caking in the thickener mostly starts from the connection (i.e., the junction) between the straight tube section and the sedimentation section of the thickener. The structure of this part of the equipment deforms greatly, and there is heat exchange with the outside at the wall of the equipment, so crystals are easy to cake. Therefore, a plurality of flushing tubes are arranged at this place, and by introducing flushing substances (such as hot water or / and compressed air) into the flushing tubes, the problem of crystal caking at the connection can be solved.

[0014] According to another specific embodiment of the present utility model, an embodiment of the present utility model discloses a crystal slurry thickener, and each of the flushing pipes is connected with a conversion member so that one end of the flushing pipe faces the connection part.

[0015] By adopting the above technical solution, by arranging the conversion member, one end of the flushing pipe faces the connection part, which is convenient for directly flushing the connection part, and it is easier and more accurate to flush away the caking generated at this place.

[0016] According to another specific embodiment of the present utility model, an embodiment of the present utility model discloses a crystal slurry thickener, and the conversion member is an elbow.

[0017] By adopting the above technical solution, by arranging the elbow, one end of the flushing pipe can face the connection part, which is convenient for directly flushing the connection part, and it is easier and more accurate to flush away the caking generated at this place.

[0018] According to another specific embodiment of the present utility model, an embodiment of the present utility model discloses a crystal slurry thickener, a ring pipe is arranged on the outer peripheral side of the connection part, each of the flushing pipes is connected with the ring pipe, and a first on-off valve is connected between each of the flushing pipes and the ring pipe.

[0019] By adopting the above technical solution, by connecting the first on-off valve between the flushing pipe and the ring pipe, the opening and closing of the flushing pipe can be controlled. When caking occurs, the flushing pipe can be opened through the first on-off valve, and when the caking problem is solved, the flushing pipe can be closed through the first on-off valve.

[0020] According to another specific embodiment of the present utility model, an embodiment of the present utility model discloses a crystal slurry thickener, the ring pipe is connected with the straight pipe, and a first electromagnetic valve is arranged between the ring pipe and the straight pipe, and the first electromagnetic valve is used for controlling the flushing time of the flushing object.

[0021] By adopting the above technical solution, by arranging the first electromagnetic valve, the flushing time can be controlled regularly.

[0022] According to another specific embodiment of the present utility model, an embodiment of the present utility model discloses a crystal slurry thickener, the crystal slurry thickener further includes a downcomer for feeding, the downcomer is axially inserted into the straight cylinder section, the downcomer extends along the axial direction, a part of the downcomer is located outside the straight cylinder section, and this part of the downcomer is connected with the outside of the straight cylinder section through a plurality of rib plates, and the plurality of rib plates are arranged at intervals in the circumferential direction.

[0023] With the above technical solution, the strength of the downcomer is enhanced by arranging the rib plates, so that one or two support pipes currently arranged inside the thickener for enhancing the strength of the downcomer can be omitted, so as to avoid crystal bridging on the one or two support pipes located inside the thickener.

[0024] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a crystal slurry thickener. Along the axial direction, a toothed weir plate is provided at the top of the straight cylinder section, and an overflow port is provided outside the straight cylinder section. Along the axial direction, the overflow port is located below the toothed weir plate, and the overflow port is used for discharging clear liquid.

[0025] With the above technical solution, after the first feed liquid is thickened by the crystal slurry thickener, there will be clear liquid above, and the clear liquid flows out from the overflow port, so as to realize the thickening of the first feed liquid, thereby improving its solid-liquid ratio.

[0026] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a crystal slurry thickener. Along the axial direction, a second switching valve is provided at the bottom of the settling section, and the second switching valve is used to connect to external equipment.

[0027] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a crystal slurry thickener. The crystal slurry thickener further includes a weighing device, which is used to connect to the cylinder body and is used to weigh the weight of the target feed liquid and control the opening and closing of the second switching valve.

[0028] With the above technical solution, the weighing device can weigh the weight of the target feed liquid. When the weight of the target feed liquid weighed by the weighing device is lower than the set value, that is, the solid-liquid ratio of the target feed liquid does not meet the requirements at this time, it is necessary to continue to thicken it, and the second switching valve is controlled to be in the closed state, and the centrifuge stops feeding (that is, the thickener is not connected to the centrifuge); when the weight is higher than the set value, that is, the solid-liquid ratio of the target feed liquid meets the requirements at this time, it means that the thickening is completed at this time, and the second switching valve is controlled to be in the open state, and the centrifuge starts feeding (that is, the thickener is connected to the centrifuge), so as to ensure the stability of the feed concentration and crystal particle size. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The structural schematic diagram of the crystal slurry thickener provided by some embodiments is shown;

[0030] Figure 2 The structural schematic diagram of the crystal slurry thickener provided by the embodiment of the present invention is shown.

[0031] Among them, the reference numerals are as follows: 10, support pipe; 20, crystal slurry distribution plate; 100, cylinder body; 101, straight cylinder section; 102, settling section; 103, cone section; 104, salt leg; 105, connection point; 200, elutriation pipe; 300, flushing pipe; 301, elbow; 302, first on-off valve; 400, straight pipe; 401, first solenoid valve; 402, first path; 403, second solenoid valve; 404, second path; 405, third solenoid valve; 500, downcomer; 600, toothed weir plate; 601, overflow port; 700, lug support; 800, second on-off valve; 900, loop pipe. Detailed implementation manners

[0032] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. Although the description of the present utility model will be introduced in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this implementation manner. On the contrary, the purpose of introducing the utility model in conjunction with the implementation manner is to cover other alternatives or modifications that may be extended based on the claims of the present utility model. In order to provide a deep understanding of the present utility model, many specific details will be included in the following description. The present utility model can also be implemented without using these details. In addition, in order to avoid confusing or obscuring the key points of the present utility model, some specific details will be omitted in the description. 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.

[0033] It should be noted that in this specification, similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0035] The terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0036] In the description of this embodiment, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific situations.

[0037] To make the purpose, technical solution, and advantages of the present utility model clearer, the embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings.

[0038] For commonly used double-stage piston push-feed centrifuges, horizontal spiral / screen filtration centrifuges, etc. that are used for solid-liquid centrifugal separation of crystal slurries, there are requirements for the crystal slurry feed concentration, crystal particle size, and feed stability, which are mainly achieved by a crystal slurry thickener.

[0039] Regarding the crystal slurry feed concentration: When considering anti-blocking in the pipeline transportation of salt crystal slurry, the general solid-liquid ratio (volume ratio) is 5% - 20%, while for a double-stage piston push-feed centrifuge, the general feed solid-liquid ratio (volume ratio) requirement is 30 - 70%, and the optimal solid-liquid ratio (volume ratio) is 40 - 60%; for a horizontal spiral / screen filtration centrifuge, the general feed solid-liquid ratio (volume ratio) requirement is 20 - 70%, and the optimal solid-liquid ratio (volume ratio) is 30 - 60%. The lower the feed solid-liquid ratio, the larger the centrifuge required, and the higher the investment cost of the centrifuge; this requires the crystal slurry to first pass through a thickener to achieve thickening before entering the centrifuge. The crystal slurry is transported into the thickener, and the crystals slowly settle in the thickener, achieving thickening in the middle and lower parts of the thickener. The clear liquid clarified at the upper part of the thickener overflows from the thickener to achieve crystal slurry thickening.

[0040] Regarding the particle size of the crystal slurry feed: For a double-stage piston push-feed centrifuge, the average crystal particle size in the feed crystal slurry is generally required to be above 0.08 mm, and for a horizontal spiral / screen filtration centrifuge, the average crystal particle size in the feed crystal slurry is generally required to be above 0.05 mm. If the crystal particle size in the centrifuge feed crystal slurry is too small, the interception rate of the centrifuge screen for crystals will decrease, resulting in the accumulation of crystals in the system and affecting the system operation. The crystal slurry thickener uses the sedimentation separation principle. The appropriate cross-sectional area of the thickener can be calculated through Stokes' sedimentation formula, and a toothed weir plate 600 is provided at the top overflow of the thickener, which can ensure that most of the crystals with a particle size lower than the design value overflow from the crystal slurry thickener with the clear liquid, so that the crystal particle size in the thickened crystal slurry meets the centrifuge feed requirements.

[0041] Regarding the feeding stability: Generally, a weighing device is installed below the lug support 700 of the crystal slurry thickener. The weighing device is interlocked with the centrifuge operation. When the weight is lower than the set value, the centrifuge stops feeding; when the weight is higher than the set value, the centrifuge starts feeding, so as to ensure the stability of the feeding concentration and crystal particle size.

[0042] However, the current thickener has problems such as crystal caking, bridging, and inability to improve purity. Specifically, referring to Figure 1 , crystal caking is likely to occur at the connection 105 between the straight tube section 101 and the conical section 103. The structural deformation of this part of the equipment is relatively large, and there is heat exchange with the outside at the wall of the equipment, so the crystals are prone to caking; at the same time, there is one or two support tubes 10 in the thickener for the downcomer 500 of the current thickener. Crystals are prone to bridging when adhering to them, and there is a conical crystal slurry distribution plate 20 at the bottom of the downcomer 500. Crystals are prone to bridging when adhering to it, and a salt cover is formed by extension, blocking the settlement of the crystal slurry; in addition, the sedimentation section 102 of the current thickener is provided with a flushing pipe 300. The flushing pipe 300 is regularly opened to prevent the sedimentation section 102 from being blocked, but there is no improvement in the crystal purity. That is to say, the current thickener only sets flushing and anti-blocking in the sedimentation section 102, and does not set a special elutriation process to improve the crystal purity.

[0043] Therefore, the embodiment of the present application provides a crystal slurry thickener, which is mainly applied to the caching and thickening of the centrifuge feeding.

[0044] Exemplarily, referring to Figure 2 , the crystal slurry thickener includes: a cylinder body 100, the inside of the cylinder body 100 is hollow, including a straight tube section 101 and a sedimentation section 102. Among them, the sedimentation section 102 is used to store the first liquid material. A plurality of elutriation pipes 200 are connected to the outer peripheral side of the sedimentation section 102. The plurality of elutriation pipes 200 are arranged at intervals along the outer peripheral side of the sedimentation section 102. The plurality of elutriation pipes 200 are in an always-open state. Each elutriation pipe 200 is connected to the sedimentation section 102. A flow meter (not shown in the figure) is provided on each elutriation pipe 200. Each elutriation pipe 200 is used to input the second liquid material into the sedimentation section 102. The flow meter is used to measure the flow rate of the second liquid material. The concentration of some liquids in the second liquid material is lower than the concentration of the same liquids in the first liquid material. The first liquid material is elutriated by the second liquid material to form a target liquid material.

[0045] Adopting the above technical solution, by connecting a plurality of elutriation tubes 200 to the outer peripheral side of the sedimentation section 102, and the plurality of elutriation tubes 200 are arranged at intervals, it is ensured that the first liquid material in the sedimentation section 102 is fully and evenly elutriated. At the same time, the elutriation tubes 200 transport the second liquid material to the sedimentation section 102. The concentration of a part of the liquid in the second liquid material is lower than the concentration of the same liquid in the first liquid material. When the second liquid material is transported to the sedimentation section 102, it can replace the liquid in the first liquid material in the sedimentation section 102, that is, replace it into the second liquid material, thereby reducing the concentration of the liquid in the first liquid material, achieving the purification of the target liquid in the first liquid material, and ensuring the purity of the target liquid material.

[0046] Meanwhile, a flow meter is provided on each elutriation tube 200, which can record the flow rate of the second liquid material, ensuring that the flow rate of the second liquid material is appropriate, which can not only keep the first liquid material tumbling and prevent bridging phenomenon, but also not affect the concentration of the target liquid in the first liquid material. Among them, the elutriation liquid volume of the second liquid material is 1.5 times the feeding volume of the first liquid material per hour, but it is not limited to this, and can be selected according to the actual working conditions.

[0047] For easy understanding, in this embodiment, the first liquid material is taken as an example containing 24.2% sodium chloride and 1.2% sodium sulfate. Among them, sodium sulfate is one of the impurities to be removed (of course, it can be understood that the first liquid material also contains other media, but since the concentration of other media is relatively low, it can be ignored. This example is only for easy understanding and does not affect the protection scope of this embodiment). The second liquid material introduced is 26.6% sodium chloride and 0.6% sodium sulfate. The concentration of sodium sulfate in the first liquid material is higher than that in the second liquid material, and the concentration of sodium sulfate in the second liquid material is lower than the saturation concentration. Therefore, when the second liquid material is mixed with the first liquid material, it can replace the sodium sulfate in the first liquid material into the second liquid material, reducing the concentration of sodium sulfate in the first liquid material, that is, reducing the concentration of impurities in the first liquid material, thereby ensuring the concentration of sodium chloride in the first liquid material and ensuring the purity of the target liquid material.

[0048] It should be noted that the number of elutriation tubes 200 in the embodiment of the present application is not limited, and can be specifically selected according to the type of crystal slurry thickener, and can be three, four, five, etc.

[0049] Among them, the sedimentation section 102 includes a conical section 103 and a salt leg 104. The elutriation tubes 200 are distributed in the sedimentation section 102, that is, distributed in the conical section 103 and the salt leg 104, thereby ensuring layered and continuous elutriation of the first liquid material, ensuring the elutriation effect, improving the purity and whiteness of the target liquid material, and the concentration of sodium sulfate in the second liquid material is lower than the saturation concentration, which can have a good rinsing effect on the surface of large crystal particles and dissolve small crystal particles, ensuring uniform crystal particles in the sedimentation section 102.

[0050] Exemplarily, a plurality of flushing pipes 300 are provided at the connection 105 between the straight pipe section 101 and the sedimentation section 102. One end of each flushing pipe 300 is communicated with the connection 105, extends into the interior of the connection 105, and is connected with a conversion member (i.e., the elbow 301 described later), so that one end of the flushing pipe 300 located inside the connection 105 faces the connection 105, and the other end extends along the radial direction (i.e., Figure 2 the Y direction shown), and is provided with a first on-off valve 302, and is connected to the straight pipe 400 through the annular pipe 900. The straight pipe 400 extends along the axial direction (i.e., Figure 2 the X direction shown), and is used for introducing flushing substances. By introducing flushing substances (such as hot water or / and compressed air) into the flushing pipe 300, the problem of crystal caking at the connection 105 is solved.

[0051] It should be noted that the number of the flushing pipes 300 in the embodiments of the present application is not limited, and can be specifically selected according to the type of the crystal slurry thickener, and can be three, four, five, etc. Specifically, for a small thickener, four flushing pipes 300 can be provided, and for a large thickener, eight flushing pipes 300 can be provided.

[0052] Exemplarily, the conversion member is an elbow 301. By providing the elbow 301, one end of the flushing pipe 300 faces the connection 105 directly, which is convenient for directly flushing the connection 105, and it is easier and more accurate to flush away the caking generated there.

[0053] Exemplarily, specifically, the annular pipe 900 is arranged on the outer peripheral side of the connection 105, that is, it surrounds the connection 105 along the circumferential direction. The first on-off valve 302 is arranged between each flushing pipe 300 and the annular pipe 900, so as to control the opening and closing of the flushing pipe 300. When caking occurs, the flushing pipe 300 can be opened through the first on-off valve 302. When the caking problem is solved, the flushing pipe 300 can be closed through the first on-off valve 302.

[0054] Exemplarily, a first electromagnetic valve 401 is arranged between the annular pipe 900 and the straight pipe 400. The first electromagnetic valve 401 is used to control the flushing time of the flushing substance. Among them, along the axial direction, the top end of the straight pipe 400 can be divided into two paths. The first path 402 is used for introducing hot water, and the second path 404 is used for introducing compressed air. An electromagnetic valve (i.e., the second electromagnetic valve 403 and the third electromagnetic valve 405 described later) or a manual on-off valve is arranged on each path.

[0055] Specifically, when hot water needs to be passed through, the second solenoid valve 403 or the manual switch valve of the first path 402 is opened, allowing it to enter the annular pipe 900 through the first path 402 and the straight pipe 400, and finally enter each flushing pipe 300, spraying from one end of the flushing pipe 300 facing the connection 105 to flush the hardening generated at the connection 105. Similarly, when compressed air needs to be passed through, the third solenoid valve 405 or the manual switch valve of the second path 404 is opened, allowing it to enter the annular pipe 900 through the second path 404 and the straight pipe 400, and finally enter each flushing pipe 300, spraying from one end of the flushing pipe 300 facing the connection 105 to blow the hardening generated at the connection 105.

[0056] It can be understood that there can also be only one path at the top of the straight pipe 400 for passing through hot water or compressed air.

[0057] In the embodiment of the present application, the top of the straight pipe 400 is divided into two paths. The first path 402 is provided with a second solenoid valve 403, and the second path 404 is provided with a third solenoid valve 405, and it is set for timed flushing. Compressed air purging is started every half hour, and the purging time is 10 s, that is, at this time, the third solenoid valve 405 of the second path 404 is opened for 10 s, the first solenoid valve 401 between the straight pipe 400 and the annular pipe 900 is opened for 10 s, and each first switch valve 302 is opened for 10 s. Hot water flushing is started every two hours, and the flushing time is 10 s, that is, at this time, the second solenoid valve 403 of the first path 402 is opened for 10 s, the first solenoid valve 401 between the straight pipe 400 and the annular pipe 900 is opened for 10 s, and each first switch valve 302 is opened for 10 s. After setting the timed compressed air purging and hot water flushing, the problem of crystal hardening is basically solved, and the increase in the treated water volume is very small.

[0058] It can be understood that all the set times can be adjusted according to the actual working conditions, such as 5 s, 8 s, 12 s, etc.

[0059] Exemplarily, the crystal slurry thickener further includes a downcomer 500. The downcomer 500 is used for feeding, and the downcomer 500 is inserted into the straight cylinder section 101 along the axial direction (i.e., Figure 2 the X direction shown), and the downcomer 500 extends along the axial direction. A part of the downcomer 500 is located outside the straight cylinder section 101, and this part of the downcomer 500 is connected to the outside of the straight cylinder section 101 through a plurality of rib plates (not shown in the figure), and the plurality of rib plates are arranged at intervals in the circumferential direction.

[0060] By adopting the above technical solution, the strength of the downcomer 500 is strengthened by setting rib plates, so that one or two layers of support pipes 10 ( Figure 1 visible) provided in the current thickener for strengthening the strength of the downcomer 500 can be omitted, so as to avoid crystal bridging on the support pipes 10 inside the thickener.

[0061] It should be noted that the number of rib plates in the embodiments of the present application is not limited, and can be specifically selected according to the type of downcomer 500, which can be six, eight, ten, etc.

[0062] Exemplarily, along the axial direction (i.e., Figure 2 the X direction shown), a toothed weir plate 600 is provided at the top of the straight cylinder section 101, and an overflow port 601 is provided on the outer side of the straight cylinder section 101. Along the axial direction, the overflow port 601 is located below the toothed weir plate 600, and the overflow port 601 is used for discharging clear liquid.

[0063] With the above technical solution, after the first feed liquid is thickened by the crystal slurry thickener, there will be clear liquid above, and the clear liquid flows out from the overflow port 601, so as to realize the thickening of the first feed liquid, thereby improving its solid-liquid ratio.

[0064] Exemplarily, along the axial direction (i.e., Figure 2 the X direction shown), a second switching valve 800 is provided at the bottom of the settling section 102. The second switching valve 800 is used to connect to an external device (such as a centrifuge). An ear-type support 700 is provided on the outer peripheral side of the straight cylinder section 101, and a weighing device (not shown in the figure) is provided on the ear-type support 700. The weighing device is connected to the cylinder body 100 and is used to weigh the weight of the target feed liquid and control the opening and closing of the second switching valve 800.

[0065] With the above technical solution, the second switching valve 800 is connected to an external device (such as a centrifuge). When the weighing device measures that the weight of the target feed liquid is lower than the set value, that is, the solid-liquid ratio of the target feed liquid does not meet the requirements at this time, it is necessary to continue to thicken it. At this time, the second switching valve 800 is controlled to be in the closed state, and the centrifuge stops feeding (that is, the thickener is not connected to the centrifuge); when the weight is higher than the set value, that is, the solid-liquid ratio of the target feed liquid meets the requirements at this time, it means that the thickening has been completed, and it can be sent to the centrifuge for the next process. At this time, the second switching valve 800 is controlled to be in the open state, and the centrifuge starts feeding (that is, the thickener is connected to the centrifuge), so as to ensure the stability of the feed concentration and crystal particle size.

[0066] Although the present invention has been illustrated and described by referring to some preferred embodiments of the present invention, those of ordinary skill in the art should understand that the above content is a further detailed description of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. Those skilled in the art can make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A crystal slurry thickener, characterized in that, Comprising: A cylinder body, which is hollow inside and includes a straight tube section and a settling section. Among them, The settling section is used to store the first liquid material. A plurality of elutriation tubes are connected to the outer peripheral side of the settling section. The plurality of elutriation tubes are arranged at intervals along the outer peripheral side of the settling section. The plurality of elutriation tubes are in an always-open state. Each elutriation tube is communicated with the settling section. A flowmeter is provided on each elutriation tube. Each elutriation tube is used to input the second liquid material into the settling section. The flowmeter is used to measure the flow rate of the second liquid material. The concentration of some liquid in the second liquid material is lower than the concentration of the same liquid in the first liquid material. The first liquid material is elutriated by the second liquid material to form a target liquid material.

2. The magma thickener according to claim 1, wherein, A plurality of flushing tubes are provided at the connection between the straight tube section and the settling section. One end of each flushing tube is communicated with the connection, and the other end is connected to a straight pipe. The straight pipe extends axially and is used to introduce a flushing substance.

3. The magma thickener according to claim 2, characterized in that, Each flushing tube is connected with a conversion part so that one end of the flushing tube faces the connection.

4. The magma thickener according to claim 3, characterized in that, The conversion part is an elbow.

5. The magma thickener according to claim 2, characterized in that, A ring pipe is provided on the outer peripheral side of the connection. Each flushing tube is connected to the ring pipe. A first on-off valve is connected between each flushing tube and the ring pipe.

6. The magma thickener according to claim 5, wherein The ring pipe is connected to the straight pipe. A first solenoid valve is provided between the ring pipe and the straight pipe. The first solenoid valve is used to control the flushing time of the flushing substance.

7. The magma thickener according to claim 1, characterized in that, The crystal slurry thickener further includes a downcomer, which is used for feeding. The downcomer is inserted into the straight tube section axially. The downcomer extends along the axis. A part of the downcomer is located outside the straight tube section, and this part of the downcomer is connected to the outer side of the straight tube section through a plurality of rib plates. The plurality of rib plates are arranged at intervals along the circumferential direction.

8. The magma thickener according to claim 1, characterized in that, Axially, a toothed weir plate is provided at the top of the straight tube section. An overflow port is provided on the outer side of the straight tube section. Axially, the overflow port is located below the toothed weir plate. The overflow port is used to discharge clear liquid.

9. The magma thickener according to claim 1, wherein Axially, a second on-off valve is provided at the bottom of the settling section. The second on-off valve is used to connect to external equipment.

10. The magma thickener according to claim 9, characterized in that, The crystal slurry thickener further includes a weighing device, which is connected to the cylinder body and is used to weigh the weight of the target liquid material and control the opening and closing of the second on-off valve.

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