Scraping wall type cooling crystallization separation device for sodium sulfate decahydrate

Abstract

The invention discloses a sodium sulfate decahydrate wall-scraping type cooling crystallization separation device which comprises a crystallization barrel, a first rotating shaft is rotatably connected in the crystallization barrel, the first rotating shaft rotates in a reciprocating mode within a certain angle range, a plurality of hollow cooling plates are arranged in the crystallization barrel, at least one arc groove is formed in each cooling plate, and the arc grooves are communicated with the first rotating shaft. A plurality of first scraping plates corresponding to the cooling plates are arranged on the first rotating shaft at intervals, mounting blocks are arranged on the first scraping plates, grooves are formed in the mounting blocks, and first connecting blocks are fixedly connected to the bottom walls of the grooves through first springs; a first wedge-shaped block is arranged at the end, away from the first spring, of the first connecting block and is in sliding fit with the arc groove, and the first wedge-shaped block is in wedge-shaped fit with the two ends of the arc groove. Through cooperative work of the first scraping plates and the first wedge-shaped blocks, efficient cleaning and wall cleaning of the cooling plates and the inner walls of the arc grooves are achieved, and therefore the crystallization efficiency and the heat exchange efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of sodium sulfate decahydrate production, in particular to a sodium sulfate decahydrate scraping-wall type cooling crystallization separation device. Background Art

[0002] The sodium sulfate decahydrate crystallization process is a key process in the production of many inorganic products. During the cooling process, the sodium sulfate in the raw material liquid undergoes a phase change to generate sodium sulfate decahydrate (Na2SO4.10H2O) solid. A large amount of cold energy is consumed during the crystallization process, and large-scale refrigeration facilities are required accordingly.

[0003] Traditional crystallization equipment uses a stirred tank crystallizer with built-in coil or an OSLO crystallizer with auxiliary forced external circulation cooling. The working principle and characteristics of the equipment are as follows: Stirred kettle crystallizer with built-in coil: A cooling coil is installed inside the stirred kettle, and the cold is transferred to the stirred kettle through the coil. The material in the kettle cools down and sodium sulfate decahydrate is precipitated. Since the cooling coil is placed inside the kettle, crystals will form outside the coil during crystallization, which seriously affects the heat transfer effect and equipment operation efficiency. After the equipment has been running for a period of time, it needs to be shut down to clean the scaling attachments. Shutdown for cleaning reduces the effective utilization rate of the equipment.

[0004] The OSLO crystallizer is a crystallizer that flushes the supersaturated liquid into the bottom along the downcomer in the middle of the crystallizer, and then turns to rise. During the rising process, the supersaturated liquid passes through the crystallization zone and fully contacts with the suspended crystal nuclei, so that the crystal nuclei can grow and the supersaturation can be eliminated. Forced external circulation cooling provides a cold source supplement for crystallization, and reduces the temperature difference between the inlet and outlet of the circulation by increasing the flow rate, reducing the supersaturation and thus delaying scaling. This process equipment has certain disadvantages, that is, the heat exchange area is large. At the same time, it needs to be equipped with a high-power axial flow pump, and the mechanical heat introduction causes a large consumption of cold.

[0005] In addition, Chinese patent publication number CN 201524442 U discloses a high-efficiency scraper-type hollow plate cooling continuous crystallizer, which arranges multiple hollow cooling plates in a U-shaped horizontal long trough container, and a rotating shaft passes through all the cooling plates. The rotating shaft drives the scraper to clean the outer surface of the cooling plate, so that the outer surface of the cooling plate is always smooth and clean, thereby greatly improving the cooling and heat transfer effect; however, the cooling plate is provided with a central long groove for the material to pass through, and the scraper cannot clean the central long groove, and during the crystallization process, the inner wall of the central long groove will also adhere to crystals. With the long-term operation of the equipment, this adhesion phenomenon will gradually accumulate, and eventually have an adverse effect on the heat exchange efficiency. Summary of the invention

[0006] The purpose of the present invention is to improve and innovate the shortcomings and problems existing in the background technology, and to provide a sodium sulfate decahydrate scraping cooling crystallization separation device.

[0007] A sodium sulfate decahydrate scraping cooling crystallization separation device comprises a crystallizer, wherein the crystallizer comprises a horizontal crystallization cylinder, wherein a first rotating shaft is rotatably connected in the crystallization cylinder, and the first rotating shaft is driven to rotate by a first driving mechanism so that the first rotating shaft rotates back and forth, wherein a plurality of hollow cooling plates are arranged at intervals in the crystallization cylinder, and a refrigerant flows in the cooling plates, wherein at least one circular arc groove is provided on the cooling plates, and the circular arc groove is used for the passage of materials to be crystallized, wherein a plurality of first scrapers corresponding to the cooling plates are arranged at intervals on the first rotating shaft, wherein a mounting block is provided on the first scraper, and a groove is provided on the mounting block, wherein the bottom wall of the groove is fixedly connected to a first connecting block via a first spring, and a first wedge block is provided at one end of the first connecting block away from the first spring, wherein the first wedge block is slidably matched with the circular arc groove, and the first wedge block is wedge-shaped matched with both ends of the circular arc groove.

[0008] A further solution is that the second driving mechanism includes a first motor, and the output end of the first motor is fixedly connected to a residual bevel gear, and the residual bevel gear is intermittently meshed with the first bevel gear and the second bevel gear in sequence, and the first bevel gear and the second bevel gear are both installed on the first rotating shaft.

[0009] A further solution is that a partition is provided inside the cooling plate, and a refrigerant inlet pipe and a refrigerant outlet pipe are provided on the cooling plate. The partition allows the refrigerant to flow through the outer surface of each arc groove in turn and then flow out of the refrigerant outlet pipe. The cooling plates are connected to each other through the refrigerant connecting pipe.

[0010] A further solution is to further include a separator, wherein the separator includes a separation cylinder, a filter mesh cylinder is arranged inside the separation cylinder, the crystallization cylinder sends the material into the filter mesh cylinder through a liquid outlet pipe, and the separation cylinder sends the solution after the crystals are separated back to the crystallization cylinder through a liquid return pipe.

[0011] A further solution is that the filter screen cylinder is driven to rotate by a second driving mechanism, and a waterproof cover is provided at the bottom end of the filter screen cylinder. An electric telescopic rod and a third motor are provided inside the waterproof cover. The telescopic end of the electric telescopic rod passes through the waterproof cover and is fixedly connected to a support plate. The support plate is provided in the first fixed cylinder, and a second spring is provided between the support plate and the top and bottom walls of the first fixed cylinder. The first fixed cylinder is installed on the lower surface of the lifting plate, and the outer surface of the lifting plate is in contact with the inner wall of the filter screen cylinder. The third motor is used to drive the cam to rotate so that the cam squeezes the lifting plate.

[0012] A further solution is that a first blanking plate and a second blanking plate are arranged between the upper end of the filter screen cylinder and the separation cylinder, the filter screen cylinder is rotatably connected to the first blanking plate, the second blanking plate is arranged to be inclined downward, a discharge pipe is arranged on the side wall of the separation cylinder corresponding to the lowest position of the second blanking plate, and a second scraper is arranged on the outer wall of the upper end of the filter screen cylinder, and the bottom end of the second scraper is in contact with the upper surface of the first blanking plate.

[0013] A further solution is that a vibration mechanism is arranged directly above the second blanking plate, and the vibration mechanism includes a second fixed cylinder, which is fixedly connected to the inner wall of the separation cylinder by a fixed rod, a second connecting block is slidably matched with the upper end of the second fixed cylinder, a second wedge block is installed on the upper end of the second connecting block, the inclined surface of the second wedge block is used to abut against the bottom end of the second scraper, a first rack is installed on the lower surface of the second connecting block, and the top wall of the second fixed cylinder is connected to the second rack by a fourth spring, the first rack and the second rack are slidably matched with the inner wall of the second fixed cylinder, the first rack is connected to the bottom wall of the second fixed cylinder by a third spring, the first rack is simultaneously meshed with the second rack with a fifth gear, and a knocking rod is installed on the lower surface of the second rack.

[0014] A further solution is that the second driving mechanism includes a second motor, and the second motor is a servo motor.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) the present invention cleans the surface of the cooling plate by the first scraper, so that the cooling surface is always kept smooth and clean, and crystals are prevented from adhering to the surface of the cooling plate, thereby avoiding affecting the cooling and heat transfer effect of the cooling plate, and greatly improving the crystallization efficiency; at the same time, the first wedge-shaped block slides along the circular arc groove, thereby realizing synchronous cleaning of the inner wall of the circular arc groove, thereby avoiding crystals from adhering to the inner wall of the circular arc groove, and avoiding the crystals from gradually accumulating on the inner wall of the circular arc groove and adversely affecting the heat exchange efficiency; in addition, since the left and right ends of the first wedge-shaped block are inclined surfaces, when the first wedge-shaped block contacts the end of the circular arc groove, the inner wall of the circular arc groove will squeeze the first wedge-shaped block into the groove, thereby enabling the first scraper to more effectively expand the cleaning range of the cooling plate; (2) The present invention drives the cam to rotate through the third motor. Under the coordinated action of the cam and the second spring, the lifting plate can shake up and down, which helps to more fully remove the residual solution between the crystals. When the residual solution on the crystals is fully removed, the electric telescopic rod can drive the lifting plate to move upward to the top of the filter cylinder, making it easier to discharge the crystals from the filter cylinder. The electric telescopic rod can drive the lifting plate to move up and down without hindering the cam from driving the lifting plate to shake up and down. (3) Under the action of centrifugal force, the present invention facilitates the crystals on the lifting plate to fall smoothly onto the first drop plate and the second drop plate. The crystals that fall directly onto the second drop plate slide downward under the action of gravity and eventually enter the discharge pipe. After the crystals fall onto the first drop plate, the second scraper can scrape the crystals on the first drop plate onto the second drop plate, so that all the crystals are eventually discharged through the discharge pipe, thereby achieving effective collection of the crystals in the filter screen cylinder. At the same time, the second scraper can intermittently drive the knocking rod to knock the second drop plate to prevent the crystals from adhering to the second drop plate, which helps the crystals to slide smoothly along the second drop plate into the discharge pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the structure of a sodium sulfate decahydrate scraping cooling crystallization separation device provided by an embodiment of the present invention; Figure 2 The embodiment of the present invention provides Figure 1 A schematic diagram of the partially enlarged structure at center A; Figure 3 A schematic diagram of the cross-sectional structure of a cooling plate provided by an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a separator provided in an embodiment of the present invention; Figure 5 A schematic diagram of the internal structure of the waterproof cover and the first fixing cylinder provided in an embodiment of the present invention; Figure 6 A schematic diagram of the structure of a vibration mechanism provided in an embodiment of the present invention.

[0018] 1. Crystallizer; 101. first motor; 102. residual bevel gear; 103. first bevel gear; 104. second bevel gear; 105. support seat; 106. first rotating shaft; 107. cooling plate; 1071. partition; 1072. arc groove; 1073. refrigerant inlet pipe; 1074. refrigerant outlet pipe; 1075. refrigerant connecting pipe; 108. first scraper; 109. mounting block; 1091. groove; 1092. first spring; 1093. first connecting block; 1094. first wedge block; 110. crystallizer; 111. liquid inlet pipe; 112. liquid return pipe; 113. liquid return pump; 114. liquid outlet pipe; 2. separator; 201. second motor; 202. first gear; 203. first The second gear; 204, the second rotating shaft; 205, the filter cylinder; 206, the waterproof cover; 207, the third motor; 208, the third gear; 209, the fourth gear; 210, the cam; 211, the electric telescopic rod; 212, the first fixed cylinder; 213, the support plate; 214, the second spring; 215, the lifting plate; 216, the first blanking plate; 217, the second blanking plate; 218, the second scraper; 219, the discharge pipe; 220, the vibration mechanism; 2201, the second wedge block; 2202, the second connecting block; 2203, the first rack; 2204, the third spring; 2205, the fifth gear; 2206, the fourth spring; 2207, the second rack; 2208, the second fixed cylinder; 2209, the knocking rod; 221, the separation cylinder. DETAILED DESCRIPTION

[0019] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0021] See also Figure 1-Figure 6The present invention provides a sodium sulfate decahydrate scraping cooling crystallization separation device, comprising a crystallizer 1 and a separator 2. The crystallizer 1 is used to cool an alkaline sodium sulfate solution to obtain a mixture of an alkaline solution and a sodium sulfate decahydrate solid. The separator 2 is used to centrifugally separate the mixture of the alkaline solution and the sodium sulfate decahydrate solid, thereby obtaining sodium sulfate decahydrate crystals, and the separated solution is sent back to the crystallizer 1 for recycling. The crystallizer 1 includes a horizontal crystallization cylinder 110, and a first rotating shaft 106 is rotatably connected in the crystallization cylinder 110. The first rotating shaft 106 is driven to rotate by a first driving mechanism so that the first rotating shaft 106 reciprocates within a certain angle range. A plurality of hollow cooling plates 107 are arranged at intervals in the crystallization cylinder 110, and a refrigerant flows in the cooling plates 107. At least one arc groove 1072 is opened on the cooling plate 107, and the arc groove 1072 is used for the material to be crystallized to pass through. In this embodiment, three arc grooves 1072 are arranged at intervals on each of the cooling plates 107. Such an arrangement allows the alkaline sodium sulfate solution passing through the cooling plates 107 to fully contact the cooling plates 107, thereby facilitating the alkaline sodium sulfate solution to fully precipitate sodium sulfate decahydrate crystals. It should be noted that an arc groove 1072 may also be provided on the cooling plate 107, and the arc grooves 1072 on adjacent cooling plates 107 are arranged at different heights. The height of the arc grooves 1072 on the cooling plate 107 may be gradually increased and then gradually decreased, so that the alkaline sodium sulfate solution is tortuously and slowly reached from one end of the crystallization tube 110 to the other end for discharge, thereby extending the heat exchange time between the alkaline sodium sulfate solution and the cooling plates 107, and also facilitating the alkaline sodium sulfate solution to fully precipitate sodium sulfate decahydrate crystals.

[0022] See also Figure 1 and Figure 2A plurality of first scrapers 108 corresponding to the cooling plates 107 are arranged at intervals on the first rotating shaft 106, and the first scrapers 108 are arranged on both sides of the cooling plate 107, wherein the first scraper 108 on one side of the cooling plate 107 is provided with a mounting block 109 corresponding to the arc groove 1072, and a groove 1091 is opened on the mounting block 109, and the bottom wall of the groove 1091 is fixedly connected with a first connecting block 1093 through a first spring 1092, and the first connecting block 1093 is slidably matched with the inner wall of the groove 1091, and a first wedge block 1094 is provided at one end of the first connecting block 1093 away from the first spring 1092, and the upper and lower ends of the first wedge block 1094 are slidably matched with the arc groove 1072, and the left and right ends of the first wedge block 1094 are wedge-shaped matched with the two ends of the arc groove 1072. Therefore, when the first driving mechanism drives the first rotating shaft 106 to rotate, the first scraper 108 will clean the surface of the cooling plate 107, so that the surface of the cooling plate 107 is always kept smooth and clean, and crystals are prevented from adhering to the surface of the cooling plate 107, thereby avoiding affecting the cooling and heat transfer effect of the cooling plate 107, and greatly improving the crystallization efficiency; at the same time, the first scraper 108 drives the first wedge block 1094 to slide along the circular arc groove 1072, thereby realizing the synchronous cleaning of the inner wall of the circular arc groove 1072, avoiding crystals from adhering to the inner wall of the circular arc groove 1072, and avoiding the gradual accumulation of crystals on the inner wall of the circular arc groove 1072 and having an adverse effect on the heat exchange efficiency. In addition, since the left and right ends of the first wedge block 1094 are inclined surfaces, when the first wedge block 1094 contacts the end of the arc groove 1072, the inner wall of the arc groove 1072 will squeeze the first wedge block 1094 into the groove 1091, so that the first scraper 108 can more effectively expand the wall cleaning range of the cooling plate 107.

[0023] For the preferred option, please continue to read Figure 1 , both ends of the first rotating shaft 106 pass through the crystallization tube 110 and are rotatably connected to the bearings on the support seat 105, and the support seat 105 makes the first rotating shaft 106 rotate more smoothly. The second driving mechanism includes a first motor 101, and the output end of the first motor 101 is fixedly connected to a residual bevel gear 102, and the residual bevel gear 102 is intermittently meshed with the first bevel gear 103 and the second bevel gear 104 in sequence, and the first bevel gear 103 and the second bevel gear 104 are both installed on the first rotating shaft 106. When the residual bevel gear 102 meshes with the first bevel gear 103 and the second bevel gear 104 in sequence according to a predetermined order, it will drive the first rotating shaft 106 to rotate in one direction first, and then rotate it in the opposite direction, so that the first rotating shaft 106 reciprocates within a certain angle range.

[0024] See also Figure 3A plurality of partitions 1071 are arranged inside the cooling plate 107. A refrigerant inlet pipe 1073 and a refrigerant outlet pipe 1074 are arranged on the cooling plate 107. The refrigerant enters the inner cavity of the cooling plate 107 through the refrigerant inlet pipe 1073. The partition 1071 allows the refrigerant to flow through the outer surface of each arc groove 1072 in turn and then flow out through the refrigerant outlet pipe 1074. The cooling plates 107 are connected to each other through the refrigerant connecting pipe 1075, so that the refrigerant can circulate between each cooling plate 107, thereby improving the heat exchange efficiency and stability of the entire cooling system.

[0025] See also Figure 1 and Figure 4 The separator 2 includes a separation cylinder 221, a filter screen cylinder 205 is arranged inside the separation cylinder 221, the crystallization cylinder 110 sends the material into the filter screen cylinder 205 through the liquid outlet pipe 114, and the separation cylinder 221 sends the solution after the crystals are separated back to the crystallization cylinder 110 through the liquid return pipe 112, the liquid return pipe 112 is connected to the liquid inlet pipe 111 on the crystallization cylinder 110, and a liquid return pump 113 is arranged on the liquid return pipe 112. The separated solution is sent back to the crystallizer 1 for secondary crystallization, which can improve the recovery rate of sodium sulfate decahydrate in the alkaline sodium sulfate solution.

[0026] The filter screen cylinder 205 is driven to rotate by a second driving mechanism, which includes a second motor 201. The second motor 201 drives the first gear 202 to rotate. The first gear 202 is meshed with the second gear 203. The second gear 203 is installed on the second rotating shaft 204. The upper end of the second rotating shaft 204 is rotatably connected to the bottom wall of the separation cylinder 221 and then fixedly connected to the bottom end of the filter screen cylinder 205, so that the second motor 201 can drive the filter screen cylinder 205 to rotate at a high speed, and the centrifugal effect is used to effectively separate the solution and the crystal. The alkaline solution and the sodium sulfate decahydrate solid are clearly separated. The separated alkaline solution is transported back to the crystallization cylinder 110 through the return pipe 112, while the sodium sulfate decahydrate solid is retained in the filter screen cylinder 205.

[0027] For further information, see Figure 4 and Figure 5The bottom end of the filter screen cylinder 205 is provided with a waterproof cover 206, and an electric telescopic rod 211 and a third motor 207 are provided in the waterproof cover 206. The electric telescopic rod 211 is provided on both sides of the third motor 207, and the telescopic end of the electric telescopic rod 211 passes through the waterproof cover 206 and is fixedly connected to a support plate 213, and the support plate 213 is provided in the first fixed cylinder 212, and a second spring 214 is provided between the support plate 213 and the top wall and the bottom wall of the first fixed cylinder 212, and the first fixed cylinder 212 is installed on the lower surface of the lifting plate 215. The outer surface of the lifting plate 215 is in contact with the inner wall of the filter screen cylinder 205, and the output end of the third motor 207 is fixedly connected to the third gear 208, and the third gear 208 is meshed with the fourth gear 209, and the other end of the gear shaft of the fourth gear 209 is installed with a cam 210, and the third motor 207 drives the cam 210 to rotate through the gear transmission mechanism, so that the cam 210 intermittently squeezes the lifting plate 215. It should be noted that the second motor 201 can drive the filter screen cylinder 205 to rotate at high speed. First, the centrifugal effect is used to clearly separate the solution and the crystal. After the solution located in the upper layer is transported back to the crystallization cylinder 110 through the return pipe 112, the second motor 201 continues to drive the filter screen cylinder 205 to rotate at high speed, and the solution remaining between the crystals can be thrown out. At the same time, the third motor 207 drives the cam 210 to rotate. Under the synergistic effect of the cam 210 and the second spring 214, the lifting plate 215 begins to shake up and down. This shaking has a disturbing effect on the crystals above the lifting plate 215, which helps the residual solution between the crystals to be thrown out more fully. When the residual solution on the crystal is fully dried, the electric telescopic rod 211 can drive the lifting plate 215 to move upward to the top of the filter screen cylinder 205, so as to facilitate the discharge of the crystals from the filter screen cylinder 205. It should be noted that the electric telescopic rod 211 can drive the lifting plate 215 to move up and down, and will not hinder the cam 210 from driving the lifting plate 215 to shake up and down.

[0028] A first blanking plate 216 and a second blanking plate 217 are provided between the upper end of the filter screen cylinder 205 and the separation cylinder 221. The upper end of the filter screen cylinder 205 is rotatably connected to the first blanking plate 216, so that the filter screen cylinder 205 rotates more smoothly. The second blanking plate 217 is tilted downward, and a discharge pipe 219 is provided on the side wall of the separation cylinder 221 corresponding to the lowest position of the second blanking plate 217. A second scraper 218 is provided on the outer wall of the upper end of the filter screen cylinder 205, and the bottom end of the second scraper 218 is in contact with the upper surface of the first blanking plate 216. When the electric telescopic rod 211 drives the lifting plate 215 to move to the top of the filter screen cylinder 205, the second motor 201 continues to drive the filter screen cylinder 205 to rotate. Under the action of centrifugal force, the crystals on the lifting plate 215 can smoothly fall onto the first blanking plate 216 and the second blanking plate 217. The crystals that fall directly on the second blanking plate 217 slide downward under the action of gravity and finally enter the discharge pipe 219. After the crystals fall onto the first blanking plate 216, the filter screen cylinder 205 drives the second scraper 218 to rotate, thereby being able to scrape the crystals on the first blanking plate 216 to the second blanking plate 217, so that all the crystals will eventually be discharged through the discharge pipe 219, thereby realizing the effective collection of the crystals in the filter screen cylinder 205.

[0029] Preferably, the second motor 201 is a servo motor, which can conveniently adjust the rotation speed of the second rotating shaft 204, so that the filter screen cylinder 205 can rotate at high speed or low speed according to actual needs. In order to ensure that the crystals on the lifting plate 215 can fall smoothly and stably onto the first blanking plate 216 and the second blanking plate 217, the servo motor can be adjusted at this time to allow the filter screen cylinder 205 to rotate at a low speed.

[0030] For further information, see Figure 4 and Figure 6A vibration mechanism 220 is arranged just above the second blanking plate 217. The vibration mechanism 220 includes a second fixed cylinder 2208. The second fixed cylinder 2208 is fixedly connected to the inner wall of the separation cylinder 221 through a fixed rod. The upper end of the second fixed cylinder 2208 is slidably matched with a second connecting block 2202. The upper end of the second connecting block 2202 is installed with a second wedge block 2201. The inclined surface of the second wedge block 2201 is used to abut against the bottom end of the second scraper 218. A first rack 2203 is installed on the lower surface of the second connecting block 2202. The top wall of the second fixed cylinder 2208 is connected to a second rack 2207 through a fourth spring 2206. The first rack 2203 and the second rack 2207 are slidably matched with the inner wall of the second fixed cylinder 2208. The first rack 2203 is connected to the bottom wall of the second fixed cylinder 2208 through a third spring 2204. The second rack 2207 is L-shaped, which helps to increase the weight of the second rack 2207 and facilitates the installation of the knocking rod 2209 on the lower surface of the second rack 2207. The fifth gear 2205 is meshed and connected between the first rack 2203 and the second rack 2207. When the filter screen cylinder 205 drives the second scraper 218 to rotate, the bottom end of the second scraper 218 contacts the inclined surface of the second wedge block 2201, and the second wedge block 2201 is squeezed and retracted into the second fixed cylinder 2208. At the same time, through the cooperation of the first rack 2203, the second rack 2207 and the fifth gear 2205, the knocking rod 2209 is driven to move upward; and when the bottom end of the second scraper 218 is separated from the upper surface of the second wedge block 2201, under the action of the third spring 2204 and the fourth spring 2206, the knocking rod 2209 is accelerated to fall, so that the knocking rod 2209 knocks the second blanking plate 217, generating vibration, thereby preventing the crystal from adhering to the second blanking plate 217 and helping the crystal to slide smoothly along the second blanking plate 217 into the discharge pipe 219.

[0031] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the invention.

[0032] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0033] Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Mentioning "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present embodiment application. The phrase appearing in various positions in the specification is not necessarily the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It can be understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. Although the embodiments of the present invention have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purpose of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A sodium sulfate decahydrate scraping cooling crystallization separation device, characterized in that: The invention comprises a crystallizer (1), wherein the crystallizer (1) comprises a horizontal crystallization cylinder (110), wherein a first rotating shaft (106) is rotatably connected inside the crystallization cylinder (110), wherein the first rotating shaft (106) is driven to rotate by a first driving mechanism so that the first rotating shaft (106) rotates back and forth, wherein a plurality of hollow cooling plates (107) are arranged at intervals inside the crystallization cylinder (110), wherein a refrigerant flows inside the cooling plates (107), wherein at least one arc groove (1072) is provided on the cooling plates (107), wherein the arc groove (1072) is used for the material to be crystallized to pass through, and wherein a plurality of hollow cooling plates (107) are arranged at intervals on the first rotating shaft (106) so as to be connected to the cooling plates (110). 07) corresponding to the first scraper (108), the first scraper (108) is provided with a mounting block (109), the mounting block (109) is provided with a groove (1091), the bottom wall of the groove (1091) is fixedly connected with a first connecting block (1093) through a first spring (1092), the first connecting block (1093) is provided with a first wedge block (1094) at one end away from the first spring (1092), the first wedge block (1094) is slidably matched with the circular arc groove (1072), and the first wedge block (1094) is wedge-matched with both ends of the circular arc groove (1072).

2. A sodium sulfate decahydrate scraping cooling crystallization separation device according to claim 1, characterized in that: The second driving mechanism comprises a first motor (101), the output end of the first motor (101) being fixedly connected to a residual bevel gear (102), the residual bevel gear (102) being intermittently meshed with a first bevel gear (103) and a second bevel gear (104) in sequence, and the first bevel gear (103) and the second bevel gear (104) are both mounted on a first rotating shaft (106).

3. A sodium sulfate decahydrate scraping cooling crystallization separation device according to claim 1 or 2, characterized in that A partition (1071) is arranged inside the cooling plate (107), and a refrigerant inlet pipe (1073) and a refrigerant outlet pipe (1074) are arranged on the cooling plate (107). The partition (1071) allows the refrigerant to flow through the outer surface of each arc groove (1072) in sequence and then flow out from the refrigerant outlet pipe (1074). The cooling plates (107) are connected to each other through the refrigerant connecting pipe (1075).

4. A sodium sulfate decahydrate scraping cooling crystallization separation device according to claim 1, characterized in that The invention also comprises a separator (2), wherein the separator (2) comprises a separation cylinder (221), wherein a filter screen cylinder (205) is arranged inside the separation cylinder (221), wherein the crystallization cylinder (110) delivers the material to the filter screen cylinder (205) via a liquid outlet pipe (114), and wherein the separation cylinder (221) delivers the solution after the crystals are separated back to the crystallization cylinder (110) via a liquid return pipe (112).

5. A sodium sulfate decahydrate scraping cooling crystallization separation device according to claim 1, characterized in that The filter screen cylinder (205) is driven to rotate by a second driving mechanism. A waterproof cover (206) is provided at the bottom end of the filter screen cylinder (205). An electric telescopic rod (211) and a third motor (207) are provided inside the waterproof cover (206). The telescopic end of the electric telescopic rod (211) passes through the waterproof cover (206) and is fixedly connected to a support plate (213). The support plate (213) is provided in a first fixed cylinder (212). A second spring (214) is provided between the support plate (213) and the top and bottom walls of the first fixed cylinder (212). The first fixed cylinder (212) is mounted on the lower surface of the lifting plate (215). The outer surface of the lifting plate (215) is in contact with the inner wall of the filter screen cylinder (205). The third motor (207) is used to drive the cam (210) to rotate so that the cam (210) presses the lifting plate (215).

6. A sodium sulfate decahydrate scraping cooling crystallization separation device according to claim 5, characterized in that A first blanking plate (216) and a second blanking plate (217) are arranged between the upper end of the filter screen cylinder (205) and the separation cylinder (221); the filter screen cylinder (205) and the first blanking plate (216) are rotatably connected; the second blanking plate (217) is arranged to be tilted downward; a discharge pipe (219) is arranged on the side wall of the separation cylinder (221) corresponding to the lowest position of the second blanking plate (217); a second scraper (218) is arranged on the outer wall of the upper end of the filter screen cylinder (205); and the bottom end of the second scraper (218) is in contact with the upper surface of the first blanking plate (216).

7. A sodium sulfate decahydrate scraping cooling crystallization separation device according to claim 6, characterized in that A vibration mechanism (220) is arranged directly above the second blanking plate (217), and the vibration mechanism (220) comprises a second fixed cylinder (2208), and the second fixed cylinder (2208) is fixedly connected to the inner wall of the separation cylinder (221) through a fixing rod, and the upper end of the second fixed cylinder (2208) is slidably matched with a second connecting block (2202), and the upper end of the second connecting block (2202) is installed with a second wedge block (2201), and the inclined surface of the second wedge block (2201) is used to abut against the bottom end of the second scraper (218), and the lower surface of the second connecting block (2202) is installed A first rack (2203) is installed, the top wall of the second fixed cylinder (2208) is connected to the second rack (2207) via a fourth spring (2206), the first rack (2203) and the second rack (2207) are slidably matched with the inner wall of the second fixed cylinder (2208), the first rack (2203) is connected to the bottom wall of the second fixed cylinder (2208) via a third spring (2204), a fifth gear (2205) is meshedly connected between the first rack (2203) and the second rack (2207), and a knocking rod (2209) is installed on the lower surface of the second rack (2207).

8. A sodium sulfate decahydrate scraping cooling crystallization separation device according to claim 5, characterized in that The second driving mechanism comprises a second motor (201), and the second motor (201) is a servo motor.

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