High-pressure filtering and drying kettle

Abstract

The invention discloses a high-pressure filtering and drying kettle, and belongs to the field of chemical equipment, the high-pressure filtering and drying kettle comprises a kettle cover and a kettle body, a filtering sleeve is arranged in the kettle body, and a plurality of filtering holes are formed in the filtering sleeve; the filtering sleeve is connected with a tubular solid outlet part, filtering holes are also formed in the circumferential side of the solid outlet part, and the stirring shaft penetrates through the filtering cavity from the stirrer and extends to the solid outlet part; spiral blades are arranged on the stirring shaft and comprise the upper spiral blade and the lower spiral blade, and the upper spiral blade is located in the filtering cavity; the screw pitch of the upper spiral blade is L1, the diameter of the upper spiral blade is gradually reduced from top to bottom, the upper spiral blade is matched with the filter sleeve, the lower spiral blade is located in the fixed part, the screw pitch of the lower spiral blade is L2, and L2 is smaller than 1 / 2 L1; the total screw pitch of the lower spiral blade is X, and X is larger than or equal to 3L2. The feeding problem of the drying kettle in the prior art is solved, so that a material body can be stably and efficiently output by the stirring shaft in the solid outlet part.

Description

Technical Field

[0001] The invention belongs to the technical field of drying and filtering, and more specifically, relates to a high-pressure filtering and drying kettle. Background Art

[0002] In some reaction systems in the prior art, a variety of technical means are provided for the water control and drying treatment of slurry.

[0003] For example, a Chinese patent document (CN 115282908 A) provides a lithium battery multifunctional reaction stirring device, which includes a kettle body and a stirring mechanism arranged on the upper side of the kettle body, the stirrer of the stirring mechanism is placed inside the kettle body, the outer circumference of the kettle body is provided with two independently arranged inner jackets for storing mother liquor and an outer jacket for providing heat required for the reaction in the kettle body, a plurality of filter holes are provided on the cylinder wall connecting the kettle body and the inner jacket, at least one feeding port and a gas filling port are provided on the kettle body, a discharge port is provided at the bottom of the kettle body, a mother liquor outlet is provided at the bottom of the inner jacket, and a hot water inlet and a hot water outlet are provided on the outer jacket.

[0004] For example, a Chinese patent document (CN 115282908 A) provides a high-efficiency stirred reactor with a built-in resin catalyst filter cartridge, which includes a reactor, a delivery pump and a reaction liquid storage tank. A stirring motor is fixedly installed on the top of the reactor, and the output shaft of the stirring motor extends into the reactor and is fixedly connected to a stirring shaft. The bottom end of the stirring shaft is rotatably connected to a first fixed frame on the inner wall of the bottom end of the reactor. Filter cartridges are fixedly connected to both ends of the stirring shaft on the inner wall of the bottom end of the reactor. The bottom end of the filter cartridge extends to the outside of the reactor and is connected to the liquid inlet end of the delivery pump through a conduit.

[0005] After the wet material is dried and filtered, the water content and fluidity are further significantly reduced, and it is easy to form lumps and jams at the discharge port, making it difficult to deliver effectively. In some cases, workers will directly remove the filter cylinder from the kettle and pour out the material directly. This operation is difficult, time-consuming, labor-intensive, and less safe.

[0006] For the above problems, the related technologies do not provide effective solutions. Summary of the invention

[0007] In order to solve the problem that it is difficult for a drying kettle in the related art to effectively deliver the material body after drying and filtration, some embodiments of the present application provide a high-pressure filtering and drying kettle, comprising: a kettle cover, on which a feed pipe is arranged, on which a stirrer is installed, on which a stirrer is arranged; the stirrer is provided with a channel for accommodating a heat medium; a kettle body, which is sealed and connected to the kettle cover to form a closed chamber; a filter sleeve is arranged inside the kettle body, and the filter sleeve is provided with a plurality of filter holes; the filter sleeve divides the closed chamber into a filter chamber and an infusion chamber, the filter chamber is located on the inner side of the filter sleeve, and the infusion chamber is located on the outer side of the filter sleeve; the filter sleeve A solid outlet is connected, the solid outlet is tubular, and a filter hole is also arranged on the circumferential side of the solid outlet, and the infusion cavity extends to the outer periphery of the solid outlet; the stirring shaft extends from the stirrer through the filter cavity to the solid outlet; the stirring shaft is provided with a spiral blade, which includes an upper spiral blade and a lower spiral blade, and the upper spiral blade is located inside the filter cavity; the pitch of the upper spiral blade is L1, and the diameter of the upper spiral blade gradually decreases from top to bottom and is adapted to the filter sleeve, the lower spiral blade is located in the solid outlet, and the pitch of the lower spiral blade is L2, L2<1 / 2L1; the total pitch of the lower spiral blade 121B is X, then X≥3L2. 。

[0008] Furthermore, the ratio of the pitch L1 of the upper spiral blade to the pitch L2 of the lower spiral blade is greater than 3:1.

[0009] Furthermore, the total pitch of the lower spiral blade 121B is X, 4L2≤X≤7L2.

[0010] Furthermore, the distance between the lower spiral blade and the inner side wall of the solid outlet portion is greater than 0 and less than 2 mm.

[0011] Furthermore, the upper spiral blade is connected to the stirring shaft through a support rod; and the inner side wall of the lower spiral blade is directly attached to the outer wall of the stirring shaft.

[0012] Furthermore, the filter sleeve includes a first filter part and a second filter part; the internal space of the first filter part is cylindrical, and its side wall is parallel to the side wall of the kettle body; the second filter part shrinks toward the side close to the solid outlet part, and its internal space is truncated cone-shaped; the second filter part is connected to the solid outlet part.

[0013] Furthermore, the volume of the first filter portion is greater than the volume of the second filter portion, and the volume of the second filter portion is greater than the volume of the solid outlet portion.

[0014] Furthermore, the side wall of the second filter portion forms an angle a with the radial direction of the stirring shaft, and 30°≤a≤75°.

[0015] Furthermore, the ratio of the diameter of the solid outlet portion to the diameter of the first filter portion is less than 1:3.

[0016] Furthermore, a discharge pipe is connected to the bottom of the kettle body, the discharge pipe is communicated with the solid discharge portion, and the discharge pipe narrows toward a side away from the solid discharge portion.

[0017] Furthermore, the discharge pipe comprises a feed port and a delivery port, the feed port is opposite to the solid outlet portion, and the ratio of the diameters of the feed port to the delivery port is between 5:4 and 3:2.

[0018] Furthermore, a sealing cover is formed on one side of the discharge pipe close to the feed port, the sealing cover is parallel to the end surface of the feed port, and the sealing cover is detachably connected to the kettle body.

[0019] Furthermore, the sealing cover is connected with a liquid outlet tube, the liquid outlet tube is communicated with the infusion cavity, and the inlet of the liquid outlet tube is connected to the lowest point of the infusion cavity.

[0020] Furthermore, the porosity of the filter hole on the filter sleeve is Z1, and the porosity of the filter hole on the upper solid part is Z2, and Z2 is greater than Z1.

[0021] Furthermore, the solid outlet portion 400 includes a first pipe section 410, a middle pipe section 420 and a tail pipe section 430 which are connected in sequence, and the first pipe section 410 is connected to the filter sleeve 210; the diameter of the first pipe section 410 is D1, the diameter of the middle pipe section 420 is D2, and the diameter of the tail pipe section 430 is D3, D2≥1.2D1, D2>D3; the outer diameter of the lower spiral blade 121B is adapted to the diameter of the first pipe section 410, so that the outer diameter in the middle of the lower spiral blade 121B is larger than the outer diameters at both ends.

[0022] Furthermore, the middle pipe section 420 and the tail pipe section 430 are connected via an inclined plate transition, D1>D2.

[0023] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: Through the cooperation between the tubular solid outlet and the lower spiral blade of the spiral blade, the material body is not easy to clump and get stuck at the bottom of the kettle body, and the material body can be stably output following the lower spiral blade of the spiral blade. Since the total pitch of the lower spiral blade of the spiral blade is limited within a reasonable range, this design can ensure the filtering efficiency of the filter sleeve. If the total pitch of the lower spiral blade is less than X, the material body will be sent out too quickly by the lower spiral blade, affecting the residence time of the material body in the filter sleeve and reducing the filtering efficiency of the material body. At the same time, since the solid outlet is also provided with a filter hole, the material body can also be further filtered in the solid outlet. Therefore, compared with the prior art, the high-pressure filter drying kettle of the present application can not only efficiently transport solid materials with greatly reduced fluidity, but also improve the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings: Figure 1 This is a schematic diagram of the structure of a high-pressure filter drying kettle according to an embodiment of the present application; Figure 2 It is a partial cross-sectional structural schematic diagram of a high-pressure filter drying kettle according to an embodiment of the present application; Figure 3 It is a partial cross-sectional structural schematic diagram of a high-pressure filter drying kettle according to an embodiment of the present application; Figure 4 This is a schematic diagram of the stirring shaft structure of a high-pressure filter drying kettle according to an embodiment of the present application; Figure 5 It is a partially enlarged schematic diagram of the cross-sectional structure of a high-pressure filter drying kettle according to an embodiment of the present application; Figure 6 This is a schematic diagram of the filter sleeve structure of a high-pressure filter drying kettle according to an embodiment of the present application; Figure 7 It is a partially enlarged schematic diagram of the cross-sectional structure of a high-pressure filter drying kettle according to an embodiment of the present application; Figure 8 This is a schematic diagram of the discharge pipe structure of a high-pressure filter drying kettle according to an embodiment of the present application; Fig. 9 It is a schematic diagram of the cross-sectional structure of a discharge pipe of a high-pressure filter drying kettle according to an embodiment of the present application; Fig.10 It is a schematic cross-sectional structure diagram of the solid outlet portion of a high-pressure filtration and drying kettle according to an embodiment of the present application; Description of labels: 100, kettle cover; 110, feed pipe; 120, stirring shaft; 121, spiral blade; 121A, upper spiral blade; 121B, lower spiral blade; 1211, support rod; 130, stirrer; 200, kettle body; 210, filter sleeve; 210-1, first filter part; 210-2, second filter part; 211, filter hole; 212, support frame; 300, sealed chamber; 310, filter chamber; 320, infusion chamber; 400, outlet; 410, head pipe section; 420, middle pipe section; 430, tail pipe section; 500, liquid outlet pipe; 600, discharge pipe; 610, feed port; 620, delivery port; 630, cover. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0026] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to express other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances.

[0027] like Figures 1 to 4 As shown, the present application provides a high-pressure filter drying kettle, including a kettle cover 100, a kettle body 200, a solid outlet 400 and a liquid outlet pipe 500. Specifically, the high-pressure filter drying kettle is generally a part of a chemical production system, and can be connected to a variety of devices to achieve an internal high-pressure environment. For example, the high-pressure filter drying kettle includes an air inlet, which can introduce gas (such as nitrogen, hydrogen, etc.) into the high-pressure filter drying kettle to increase the pressure inside the kettle.

[0028] like Figure 1 As shown, a feed pipe 110 is provided on the kettle cover 100, and the feed pipe 110 is used to introduce slurry. The kettle cover 100 is installed with an agitator 130, and the agitator 130 is provided with a stirring shaft 120. The stirring shaft 120 is provided with a channel for accommodating a heat medium to reduce the humidity of the slurry in the kettle body 200 as much as possible. The heat medium can be hot water, hot steam, hot air, etc. In particular, when the slurry is a high temperature resistant material, the stirring shaft 120 can accommodate a high temperature heat medium, which can make its drying rate higher.

[0029] Specifically, if Figure 1 As shown, the feed pipe 110 is symmetrically arranged on the top of the kettle cover 100 with the axis of the stirring shaft 120a as the symmetry line to ensure the uniformity of the slurry in the kettle body 200, and the flow direction of the feed pipe 110 is parallel to the axis of the stirring shaft 120. The number of the feed pipes 110 can be 2, 4 or 6. Specifically, the feed pipe 110 is sealed and connected to the kettle cover 100, and its feed pressure is greater than the pressure in the kettle body 200.

[0030] like Figure 2 As shown, the kettle body 200 is sealed and connected to the kettle cover 100 to form a closed chamber 300. A filter sleeve 210 is provided inside the kettle body 200, and the filter sleeve 210 is provided with a plurality of filter holes 211. The filter holes 211 can intercept the fixed medium and only allow water to seep out. As an optional solution, the diameter of the filter hole 211 is less than 10 μm.

[0031] like Figure 2 As shown, the closed chamber 300 of the filter sleeve 210 is divided into a filter chamber 310 and an infusion chamber 320, wherein the filter chamber 310 is located inside the filter sleeve 210, and the infusion chamber 320 is located outside the filter sleeve 210. Specifically, the filter chamber 310 is located inside the filter sleeve 210 for accommodating slurry, and the infusion chamber 320 is located outside the filter sleeve 210, and the water in the slurry is discharged into the infusion chamber 320 through the filter hole 211 on the filter sleeve 210.

[0032] like Figure 3 As shown, the filter sleeve 210 is connected to the solid outlet portion 400, which is tubular and has filter holes 211 on the circumferential side. The infusion cavity 320 extends to the outer periphery of the solid outlet portion 400, so that the water in the material body is further filtered into the infusion cavity 320 through the filter holes 211 in the solid outlet portion 400, such as the stirring shaft 120 extending from the stirrer 130 through the filter cavity 310 to the solid outlet portion 400.

[0033] Optionally, the filter sleeve 210 and the solid outlet portion 400 are integrally formed.

[0034] like Figure 3 , 4As shown, the stirring shaft 120 is provided with a spiral blade 121, and the spiral blade 121 includes an upper spiral blade 121A and a lower spiral blade 121B. Specifically, the upper spiral blade 121A and the lower spiral blade 121B are connected as one. The upper spiral blade 121A is located inside the filter cavity 310; the pitch of the upper spiral blade 121A is L1, and the blade diameter of the upper spiral blade 121A gradually decreases from top to bottom and is adapted to the filter sleeve 210, and the lower spiral blade 121B is located in the solid outlet 400, and the pitch of the lower spiral blade 121B is L2, L2<1 / 2L1; the total pitch of the lower spiral blade 121B is X, X≥3L2, for example, X can be 4L2, 5L2, 6L2 or 7L2, etc.

[0035] It is worth noting that since the lower spiral blade 121B is a single spiral line, its pitch L2 is equal to its lead, which is the distance that the material travels axially in the solid outlet portion 400 when the stirring shaft 120 rotates one circle. The design of X≥3L2 requires the stirring shaft 120 to rotate at least 3 cycles before the lower spiral blade 121B can deliver the material.

[0036] Reference Figure 2 , 3 As shown, in the embodiment, the total pitch X of the lower spiral blade 121B is 5L2, and the stirring shaft 120 must rotate at least 5 cycles before the lower spiral blade 121B can deliver the material.

[0037] In this way, through the cooperation of the tubular solid outlet portion 400 and the lower spiral blade 121B, the material body is not easy to clump and get stuck at the bottom of the kettle body 200, and can be stably output following the lower spiral blade 121B of the spiral blade 121. Since the total pitch of the lower spiral blade 121B of the spiral blade is limited within a reasonable range, this design enables the filter sleeve to ensure the filtration efficiency. If the total pitch of the lower spiral blade 121B is less than X, the material body will be sent out too quickly by the lower spiral blade 121B, affecting the residence time of the material body in the filter sleeve 210 and reducing the filtration efficiency of the material body. At the same time, since the solid outlet portion is also provided with a filter hole 211, the material body can also be further filtered in the solid outlet portion 400. Therefore, compared with the prior art, the high-pressure filter drying kettle of the present application can not only efficiently transport the material body with reduced fluidity after water filtration, but also improve the filtration effect.

[0038] Further, such as Figure 3 As shown, the ratio of the pitch L1 of the upper spiral blade 121A to the pitch L2 of the lower spiral blade 121B is 3:1 or more.

[0039] Preferably, the total pitch of the lower spiral blade 121B is X, 4L2≤X≤7L2. This design makes the filtration time and discharge speed of the material relatively balanced.

[0040] Specifically, if Figure 3 , 4 As shown, the upper spiral blade 121A is connected to the stirring shaft 120 through a support rod 1211. The inner side wall of the lower spiral blade 121B is directly attached to the outer wall of the stirring shaft 120 to fully utilize the space and perform the discharging work more efficiently.

[0041] Preferably, if Figure 5 As shown, the distance Z between the lower spiral blade 121B and the inner wall of the solid outlet portion 400 is greater than 0 and less than 2 mm, so that the space inside the solid outlet portion 400 is reduced. When the material enters the solid outlet portion 400, the material still has a large pressure to ensure the material feeding efficiency. Moreover, under the action of the lower spiral blade 121B of the spiral blade 121, the material can further fit with the filter hole 211 on the solid outlet portion, and the water filtering effect is better.

[0042] Specifically, Figure 3 , 6 As shown, the filter sleeve 210 includes a first filter portion 210-1 and a second filter portion 210-2. The internal space of the first filter portion 210-1 is cylindrical, and its side wall is parallel to the side wall of the kettle body 200; the second filter portion 210-2 shrinks toward the side close to the solid outlet portion 400, and its internal space is truncated. The volume of the first filter portion 210-1 is greater than the volume of the second filter portion 210-2, and the second filter portion 210-2 is connected to the solid outlet portion 400.

[0043] Among them, the first filter cloth can ensure the filtration amount in the filter sleeve 210, and the second filter part 210-2 is combined with the solid outlet part 400 to form a funnel shape. The second filter part 210-2 is used to connect the first filter part 210-1 and the solid outlet part 400 to avoid the material body encountering a dead corner before entering the solid outlet part 400, so that the material body can slide into the solid outlet part 400, which fully overcomes the problem of a large amount of material body easily remaining in the filter sleeve 210 in the related technology.

[0044] Preferably, the side wall of the second filter portion 210 - 2 forms an angle a with the radial direction of the stirring shaft 120 , and 30°≤a≤75°, for example 33°, 38°, 45°, 60° or 69°. This design makes it easier for the material to gather in the solid outlet portion 400 .

[0045] Specifically, the ratio of the tube diameter of the solid outlet part 400 to the diameter of the first filter part 210-1 is less than 1:3. More specifically, the volume of the first filter part 210-1 is greater than the volume of the second filter part 210-2, and the volume of the second filter part 210-2 is greater than the volume of the solid outlet part 400. There is a large difference between the radial cross-sections of the first filter part 210-1 and the solid outlet part 400. The three filter parts show a decreasing volume difference, so that the material body stays in the filter sleeve 210 for a longer time, and the filtration is more sufficient before discharging.

[0046] Further, such as Figure 7 , 8 As shown in Figure 9, a discharge pipe 600 is connected to the bottom of the kettle body 200. The discharge pipe 600 is communicated with the solid discharge portion 400. The discharge pipe 600 narrows toward the side away from the solid discharge portion. After the material enters the discharge pipe 600 from the solid discharge portion 400, the flow rate in the discharge pipe 600 is further limited and the flow rate is slowed down, so that the high-pressure filter drying kettle can discharge materials continuously and stably.

[0047] More specifically, Figure 8 , 9 As shown, the discharge pipe 600 includes a feed port 610 and a delivery port 620. The feed port 610 is opposite to the solid discharge portion 400 and is consistent with the inner diameter of the tube of the solid discharge portion 400. The ratio of the diameter A1 of the feed port 610 to the diameter A2 of the delivery port 620 is between 5:4 and 3:2. If the above diameter ratio is less than 5:4, the discharge may be easily interrupted quickly, and if it is greater than 3:2, the discharge speed will be greatly reduced.

[0048] Preferably, Figure 6 As shown, the filter holes 211 are evenly distributed on the filter sleeve 210 and the solid outlet portion 400, and are of equal size. Specifically, the porosity of the filter holes 211 on the filter sleeve 210 is Z1, and the porosity of the filter holes 211 on the upper solid outlet portion 400 is Z2, and Z2 is greater than Z1. Since the pressure on the material body in the solid outlet portion is greater, this design allows the material body to further filter water in the solid outlet portion 400, further improving the filtering efficiency.

[0049] Since the water content of the material in the discharge pipe 600 is greatly reduced, even if the material in the kettle is discharged as much as possible, some of the material will still remain in the solid discharge part 400, which may cause a burden on the subsequent solid discharge work. Therefore, in order to conveniently clean and maintain the solid discharge part 400, a cover 630 is formed on one side of the discharge pipe 600 close to the feed port 610. The cover 630 is parallel to the end face of the feed port 610 and is detachably connected to the kettle body 200.

[0050] In order to prevent the liquid in the infusion cavity 320 from re-penetrating into the material body from the connection between the discharge pipe 600 and the solid discharge part 400, the solid discharge part 400 is sealedly connected to the discharge pipe 600. In detail, a sealing ring is sandwiched between the discharge pipe 600 and the solid discharge part 400.

[0051] like Figure 7 As shown, the cover 630 is connected to a liquid outlet tube, which is in communication with the infusion chamber 320 , and the inlet of the liquid outlet tube is connected to the lowest point of the infusion chamber 320 , so that the water flows out in cooperation with the high pressure in the kettle without the need for an additional water pump.

[0052] Specifically, the infusion cavity 320 is connected to a water storage device, which is not higher than the infusion cavity 320. A liquid level sensor is provided on the top surface of the water storage device. When the top surface liquid level sensor senses that the water storage device is full of water, the water storage device releases water outward. This design can ensure that the pressure of the high-pressure filter drying kettle will not leak during normal operation, and can also avoid the problem of water reflux causing the infusion cavity 320 to be refilled with water, thereby increasing the humidity of the slurry.

[0053] Among them, when the high-pressure filter drying kettle is fed for the first time, the material that first enters the kettle body from the feed pipe 110 is easy to directly enter the solid outlet part 400 from the filter sleeve 210 and flow out quickly from the solid outlet part 400, which will cause the water content of this part of the material to be higher, and the material part output by the high-pressure filter drying kettle has the problem of uneven humidity.

[0054] In order to optimize the above problems, further, Fig.10 As shown, the solid outlet portion 400 includes a first pipe section 410, a middle pipe section 420 and a tail pipe section 430 connected in sequence, and the first pipe section 410 is connected to the filter sleeve 210, and the first pipe section 410 and the filter sleeve 210 can be integrally formed. The diameter of the first pipe section 410 is D1, the diameter of the middle pipe section 420 is D2, and the diameter of the tail pipe section 430 is D3, D2 ≥ 1.2D1, D2>D3. The outer diameter of the lower spiral blade 121B is adapted to the diameter of the first pipe section 410, and the outer diameter in the middle of the lower spiral blade 121B is greater than the outer diameters at both ends. In detail, the outer diameter of the lower spiral blade 121B in the middle pipe section 420 is greater than the inner diameter of the first pipe section 410.

[0055] It is worth emphasizing that the filter holes 211 are always evenly arranged in the solid outlet portion 400, so that when the material body passes through each section of the solid outlet portion 400, the water can be filtered out.

[0056] In this way, since the blades of the lower spiral blades 121B located in the middle pipe section 420 exceed the inner diameter of the first pipe section 410, when the material enters the first pipe section 410 of the solid outlet portion 400 and flows toward the middle pipe section 420, it will be stopped by the lower spiral blades 121B in the middle pipe section 420, and the material will have a certain retention time in the solid outlet portion 400. During this retention time, the material is further filtered, thereby improving the uniformity of the discharge. Moreover, when the material flows from the middle pipe section 420 to the tail pipe section 430, since the diameter of the tail pipe section 430 is reduced relative to the middle pipe section 420, the material is further pressurized, thereby improving the water filtering effect of the solid outlet portion 400.

[0057] Preferably, the middle pipe section 420 and the tail pipe section 430 are connected by an inclined plate transition, so that the material of the middle pipe section 420 can slide into the tail pipe section 430 through the inclined plate.

[0058] Furthermore, D1>D2, that is, the diameters of the first pipe section 410 and the tail pipe section 430 also have a certain difference, and the diameter of the first pipe section 410 is larger than the diameter of the tail pipe section 430, thereby ensuring that the material body is stagnant in the solid outlet portion 400.

[0059] In general, the high-pressure filter-drying kettle fits the characteristics of the slurry, can efficiently filter water and dry the slurry, and stably transport the material to the outside. It has a simplified structure and is easy to clean.

[0060] In this application, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0061] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high pressure filter drying kettle, characterized in that: include: A kettle cover (100), wherein a feed pipe (110) is provided on the kettle cover (100), a stirrer (130) is installed on the kettle cover (100), and a stirring shaft (120) is provided on the stirrer (130); the stirring shaft (120) is provided with a channel for accommodating a heat medium; A kettle body (200), the kettle body (200) being sealedly connected to a kettle cover (100) to form a sealed chamber (300); a filter sleeve (210) is provided inside the kettle body (200), the filter sleeve (210) being provided with a plurality of filter holes (211); the filter sleeve (210) divides the sealed chamber (300) into a filter chamber (310) and an infusion chamber (320), the filter chamber (310) being located on the inner side of the filter sleeve (210), and the infusion chamber (320) being located on the outer side of the filter sleeve (210); The filter sleeve (210) is connected to a solid outlet portion (400), the solid outlet portion (400) is tubular, and a filter hole (211) is also provided on the circumferential side of the solid outlet portion (400), and the infusion cavity (320) extends to the outer circumference of the solid outlet portion (400); the stirring shaft (120) extends from the stirrer (130) through the filter cavity (310) to the solid outlet portion (400); The stirring shaft (120) is provided with a spiral blade (121), the spiral blade (121) comprising an upper spiral blade (121A) and a lower spiral blade (121B), the upper spiral blade (121A) being located inside the filter cavity (310); the pitch of the upper spiral blade (121A) being L1, the blade diameter of the upper spiral blade (121A) gradually decreasing from top to bottom and being adapted to the filter sleeve (210), the lower spiral blade (121B) being located inside the solid outlet portion (400), and the pitch of the lower spiral blade (121B) being L2, L2<1 / 2L1; The total pitch of the lower spiral blade (121B) is X, then X≥3L2.

2. A high pressure filter drying kettle according to claim 1, characterized in that: The ratio of the pitch L1 of the upper spiral blade (121A) to the pitch L2 of the lower spiral blade (121B) is greater than 3:

1.

3. A high pressure filter drying kettle according to claim 2, characterized in that: The total pitch of the lower spiral blade (121B) is X, 4L2≤X≤7L2.

4. A high pressure filter drying kettle according to claim 1, characterized in that: The distance Z between the lower spiral blade (121B) and the inner wall of the fixing portion (400) is greater than 0 and less than 2 mm.

5. A high pressure filter drying kettle according to claim 1, characterized in that: The upper spiral blade (121A) is connected to the stirring shaft (120) via a support rod (1211); the inner side wall of the lower spiral blade (121B) is directly attached to the outer wall of the stirring shaft (120).

6. A high pressure filter drying kettle according to claim 1, characterized in that: The filter sleeve (210) comprises a first filter portion (210-1) and a second filter portion (210-2); the internal space of the first filter portion (210-1) is cylindrical, and its side wall is parallel to the side wall of the kettle body (200); the second filter portion (210-2) shrinks toward a side close to the solid outlet portion (400), and its internal space is truncated cone-shaped; the second filter portion (210-2) is connected to the solid outlet portion (400).

7. A high pressure filter drying kettle according to claim 6, characterized in that: The volume of the first filter portion (210-1) is greater than the volume of the second filter portion (210-2), and the volume of the second filter portion (210-2) is greater than the volume of the solid outlet portion (400).

8. A high pressure filter drying kettle according to claim 6, characterized in that: The side wall of the second filter portion (210-2) forms an angle a with the radial direction of the stirring shaft (120), and 30°≤a≤75°.

9. A high pressure filter drying kettle according to claim 6, characterized in that: The ratio of the tube diameter of the solid outlet portion (400) to the diameter of the first filter portion (210-1) is less than 1:

3.

10. A high pressure filter drying kettle according to claim 6, characterized in that: A discharge pipe (600) is connected to the bottom of the kettle body (200), the discharge pipe (600) is in communication with the solid discharge portion (400), and the discharge pipe (600) narrows toward a side away from the solid discharge portion.

11. A high pressure filter drying kettle according to claim 10, characterized in that: The discharge pipe (600) comprises a feed port (610) and a delivery port (620), wherein the feed port (610) is opposite to the solid outlet portion (400), and the ratio of the diameter of the feed port (610) to the diameter of the delivery port (620) is between 5:4 and 3:

2.

12. A high pressure filter drying kettle according to claim 10, characterized in that: A sealing cover (630) is also formed on one side of the discharge pipe (600) close to the feed port (610). The sealing cover (630) is parallel to the end surface of the feed port (610), and the sealing cover (630) is detachably connected to the kettle body (200).

13. A high pressure filter drying kettle according to claim 10, characterized in that: The sealing cover (630) is connected to a liquid outlet tube, the liquid outlet tube is in communication with the infusion cavity (320), and the inlet of the liquid outlet tube is connected to the lowest point of the infusion cavity (320).

14. A high pressure filter drying kettle according to any one of claims 1 to 13, characterized in that: The porosity of the filter hole (211) on the filter sleeve (210) is Z1, and the porosity of the filter hole (211) on the upper solid portion (400) is Z2, and Z2 is greater than Z1.

15. A high pressure filter drying kettle according to claim 14, characterized in that: The solid outlet portion (400) comprises a first pipe section (410), a middle pipe section (420), and a tail pipe section (430) which are connected in sequence, and the first pipe section (410) is connected to the filter sleeve (210); The diameter of the first pipe section (410) is D1, the diameter of the middle pipe section (420) is D2, and the diameter of the tail pipe section (430) is D3, D2≥1.2D1, D2>D3; The outer diameter of the lower spiral blade (121B) is matched to the diameter of the first pipe section (410), so that the outer diameter in the middle of the lower spiral blade (121B) is larger than the outer diameters at both ends.

16. A high pressure filter drying kettle according to claim 15, characterized in that: The middle pipe section (420) and the tail pipe section (430) are connected via an inclined plate transition, with D1>D2.

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