An evaporation crystallization device for preparing sodium sulfate and a process thereof

Abstract

The application relates to a sodium sulfate preparation technical field, in particular to an evaporation crystallization device for sodium sulfate preparation and a process thereof, which comprises a crystallization tank, a crystallization auxiliary assembly, a power assembly and a spraying assembly, and the crystallization auxiliary assembly is rotationally arranged in the crystallization tank. The output shaft of the power motor drives the rotating block and four shift rods to rotate, the four shift rods are in contact with the side walls of the four torsion grooves, so that the rotating disc is twisted to rotate, the rotating disc drives the six-prong rod and the central vertical shaft to rotate, the central vertical shaft drives the bent frame, the linear bearing, the slide rod and the board to rotate, the board rotation can spread the sodium sulfate solution sprayed on the inner wall of the crystallization tank, at the same time, the board can disturb the flowing sodium sulfate solution and spread the flowing sodium sulfate solution on the inner wall of the crystallization tank again, so that the flowing sodium sulfate solution does not pollute the crystals scraped off from the previous step and fallen to the bottom of the crystallization tank.

Description

Technical Field

[0001] This invention relates to the field of sodium sulfate preparation technology, specifically to an evaporation and crystallization apparatus and process for preparing sodium sulfate. Background Technology

[0002] Sodium sulfate, also known as anhydrous sodium sulfate, is a white, monoclinic, fine crystalline powder or crystalline substance with a relative density of 2.68 and a melting point of 884℃. It is soluble in water, and its aqueous solution is neutral. It is an important chemical raw material widely used in various industries. In the chemical industry, sodium sulfate is a major raw material for the production of sodium sulfide, sodium silicate, and other chemical products. In the paper industry, it is used as a cooking agent in the manufacture of sulfate pulp. In the glass industry, it can replace soda ash. Furthermore, sodium sulfate can be used as a filler in synthetic detergents, and in the pharmaceutical field, it is used as a laxative and antidote. Evaporation crystallization is the core process in sodium sulfate production. By evaporating water to make the solution supersaturated, sodium sulfate crystals are precipitated, thereby achieving the separation and purification of sodium sulfate.

[0003] According to a Chinese patent application with publication number 202510317722.8, an evaporation crystallization device for high-purity sodium sulfate is disclosed. The device uses a drive assembly to rotate the spray pipe and nozzle. When the solution sprayed from the nozzle contacts the high-temperature inner wall of the evaporation tank, the water in the solution evaporates rapidly, thereby accelerating the precipitation of sodium sulfate crystals and effectively improving the evaporation crystallization efficiency. However, the scraper of the device remains in contact with the inner wall of the evaporation pipe and rotates continuously with the nozzle. Since sodium sulfate requires a certain amount of time to absorb heat and evaporate, the rotating scraper can easily scrape off the incompletely crystallized sodium sulfate solution, resulting in insufficient purity of the sodium sulfate. Therefore, we propose an evaporation crystallization device and process for preparing sodium sulfate to solve the above-mentioned technical problems. Summary of the Invention

[0004] Therefore, the present invention provides an evaporation and crystallization apparatus and process for preparing sodium sulfate, in order to solve the above-mentioned problems.

[0005] This invention provides the following technical solution: an evaporation and crystallization apparatus for preparing sodium sulfate, comprising:

[0006] Crystallization tank;

[0007] A crystallization auxiliary component is rotatably disposed inside the crystallization tank; the crystallization auxiliary component includes:

[0008] The central vertical axis is rotatably mounted inside the crystallization tank.

[0009] Two bending frames are symmetrically distributed and fixedly installed on the outer wall around the central vertical axis.

[0010] Linear bearing, fixedly installed on the upper and lower sides of the two curved frames away from the one side of the central vertical shaft;

[0011] Sliding rod, slidingly installed in the linear bearing;

[0012] Paving board, fixedly installed on the two sliding rods away from the one end of the central vertical shaft, and a gap of 0.5mm is arranged between the end of the paving board and the inner wall of the central vertical shaft;

[0013] Spring one, sleeved on the outer periphery of the sliding rod;

[0014] Pushing plate, fixedly installed on the two sliding rods away from the paving board;

[0015] Jacking rod, fixedly installed on the middle part of the two pushing plates close to the one side of the central vertical shaft.

[0016] As a preferred scheme of the present application, the crystallization auxiliary assembly further comprises:

[0017] Hexagonal sliding cavity, arranged on the top of the central vertical shaft and extending to the inside thereof;

[0018] Hexagonal rod, slidingly installed in the hexagonal sliding cavity, two wedge grooves are arranged on the lower part of the outer wall of the hexagonal rod, the two wedge grooves are symmetrically distributed about the center of the hexagonal rod, and the end of the jacking rod is in abutment with the inner wall of the wedge groove;

[0019] Spring two, arranged in the hexagonal sliding cavity and fixedly installed between the bottom wall of the hexagonal sliding cavity and the bottom of the hexagonal rod.

[0020] As a preferred scheme of the present application, the power assembly comprises:

[0021] Power motor, fixedly installed on the top of the crystallization tank through a support;

[0022] Rotating block, fixedly installed on the output shaft of the power motor;

[0023] Dial lever, fixedly installed on the outer wall of the rotating block at equal angles, and the number is four;

[0024] Rotating disc, fixedly installed on the top of the outer wall of the hexagonal rod;

[0025] Torsion block, fixedly installed at the edge of the top of the dial lever at equal angles, and the number is four;

[0026] Torsion groove, arranged on the top of the torsion block, the torsion groove comprises a smooth part and an inclined part, and the outer wall of the dial lever is in abutment with the inner wall of the torsion groove.

[0027] As a preferred scheme of the present application, the spraying assembly comprises:

[0028] Distributing cylinder, fixedly arranged on the inner upper end of the crystallization tank;

[0029] A bottom blocking disc is rotatably installed inside the distribution cylinder, and a sealing bearing is arranged between the outer wall of the bottom blocking disc and the inner wall of the distribution cylinder, and the bottom blocking disc is rotatably connected with the distribution cylinder through the sealing bearing.

[0030] A discharge port is symmetrically arranged on the top of the bottom blocking disc and extends to the bottom of the bottom blocking disc.

[0031] A spray pipe is fixedly installed at the bottom of the discharge port through a joint.

[0032] Two spray frames are fixedly installed on the outer wall of the bottom blocking disc and are symmetrically arranged about the central vertical axis.

[0033] Two flat-nozzle nozzles are fixedly installed in the two spray frames and are symmetrically arranged about the central vertical axis, and the input end of the flat-nozzle nozzle is fixedly connected with the output end of the spray pipe.

[0034] As a preferred scheme of the present application, the spray assembly further comprises:

[0035] Two hangers are fixedly installed between the top of the two bent frames and the bottom of the bottom blocking disc.

[0036] Two let-in grooves are symmetrically arranged on the outer wall of the bottom blocking disc and are connected with the inner part of the six-ribbed sliding cavity, and the number of the let-in grooves is two.

[0037] Two push derivation frames are fixedly installed on the outer wall of the six-ribbed rod and are symmetrically arranged about the central vertical axis and are slidably connected with the two let-in grooves.

[0038] Two connecting rods are fixedly installed at the bottom of the two push derivation frames.

[0039] An annular plug is fixedly installed at the bottom of the two connecting rods and is slidably connected with the inner wall of the distribution cylinder through a sealing bushing.

[0040] As a preferred scheme of the present application, the spray assembly further comprises:

[0041] A second feeding port is arranged on the outer wall of the distribution cylinder and extends to the inside of the distribution cylinder, and the second feeding port is located between the bottom of the annular plug and the top of the bottom blocking disc.

[0042] A supply pipe is fixedly installed at the inside of the second feeding port through a joint.

[0043] A quick connector is fixedly installed on the input end of the supply pipe, a first feeding port is arranged on the top of the crystallization tank, and the quick connector is screwed in the first feeding port.

[0044] As a preferred scheme of the present application, the top rod is movably penetrated through the side wall of the central vertical shaft and extends into the six-ribbed slide cavity.

[0045] As a preferred scheme of the present application, the top of the distribution cylinder is fixedly provided with four fixed rods with equal angles, and the top of the four fixed rods is fixedly provided on the top wall of the crystallization tank.

[0046] As a preferred scheme of the present application, the bottom wall of the crystallization tank is fixedly provided with a bearing frame, the central vertical shaft is rotatably connected with the bearing frame through a damping bearing, the bottom of the crystallization tank is fixedly provided with a discharge pipe, the inside of the discharge pipe is communicated with the inside of the crystallization tank, the side of the crystallization tank is fixedly provided with a feeding device, the output end of the feeding device is connected with the feeding inlet through a pipeline, and the periphery of the crystallization tank is fixedly provided with a heater.

[0047] An evaporation crystallization process of an evaporation crystallization device for preparing sodium sulfate, comprising the following steps:

[0048] S1, the crystallization auxiliary assembly is driven to rotate by the power assembly, the two flat-nozzle nozzles spray the sodium sulfate solution on the inner wall of the crystallization tank while rotating, and the heater heats the crystallization tank to evaporate water;

[0049] S2, the two flat plates are used to flatten the sodium sulfate solution sprayed on the inner wall of the crystallization tank, and the sodium sulfate solution flowing down is disturbed and scraped to the inner wall of the crystallization tank.

[0050] S3, the crystallization auxiliary assembly is driven to reverse by the power assembly, the two flat plates scrape the sodium sulfate crystals from the inner wall of the crystallization tank, and the sodium sulfate crystals are discharged through the discharge pipe.

[0051] Compared with the prior art, the present application has the following beneficial effects:

[0052] 1、In the present application, the output shaft of the power motor drives the rotating block to rotate together with the four shift rods, the four shift rods are in contact with the side walls of the four torsion grooves, so as to twist the rotating disc to rotate, the rotating disc drives the six-ribbed rod and the central vertical shaft to rotate, the central vertical shaft drives the bent frame, the linear bearing, the slide rod and the flat plate to rotate together, the flat plate can flatten the sodium sulfate solution sprayed on the inner wall of the crystallization tank, and the sodium sulfate solution flowing down is disturbed and scraped to the inner wall of the crystallization tank again, so as to prevent the sodium sulfate solution flowing down from polluting the crystals scraped to the bottom of the crystallization tank in the previous step.

[0053] 2、The application, by the reverse rotation of the power motor, makes two top rods drive two push derivation plates to move reversely, spring one compresses force storage, at the same time, the push derivation plates drive the spreader to move together under the sliding connection of the slide rod and the linear bearing, so that the end of the spreader is in contact with the inner wall of the discharge pipe, thereby scraping off the extracted anhydrous sodium sulfate crystals in the process of rotating with the central vertical shaft, and finally discharging through the discharge pipe.

[0054] 3、The application, when the six-edge rod moves downward along the inner wall of the six-edge sliding cavity, also drives two connecting rods and the annular plug to move downward along the inner wall of the distribution cylinder through the connecting action of two push derivation frames, so that the annular plug is plugged in the end of the second feeding port, at this time, the second feeding port cannot continue to transport the anhydrous sodium sulfate solution into the distribution cylinder, that is, the two flat nozzle nozzles stop spraying, so that the spraying of the anhydrous sodium sulfate solution is automatically interrupted during the scraping of the anhydrous sodium sulfate crystals precipitated on the inner wall of the crystallization tank, so as to prevent the precipitated anhydrous sodium sulfate crystals from being wetted and dissolved again. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 It is a structural schematic diagram of the application;

[0056] Figure 2 It is a side cross-sectional structural schematic diagram of the crystallization tank in the application;

[0057] Figure 3 It is an enlarged structural schematic diagram of A part in the application; Figure 2

[0058] Figure 4 It is a structural schematic diagram of the crystallization auxiliary assembly in the application;

[0059] Figure 5 It is an enlarged structural schematic diagram of B part in the application; Figure 4

[0060] Figure 6 It is an expanded structural schematic diagram of the power assembly in the application;

[0061] Figure 7 It is a structural schematic diagram of the spraying assembly in the application;

[0062] Figure 8 It is a local structural schematic diagram of the application; Figure 7

[0063] Figure 9 It is a side cross-sectional structural schematic diagram of the central vertical shaft in the application;

[0064] Figure 10 It is an enlarged structural schematic diagram of C part in the application. Figure 9

[0065] ​​​​In the figure: 100, crystallization tank; 101, discharge pipe; 102, feed inlet one; 103, bearing frame; 200, crystallization auxiliary assembly; 201, central vertical shaft; 202, bent frame; 203, linear bearing; 204, sliding rod; 205, slab; 206, spring one; 207, push derivation plate; 208, top rod; 209, six-edge sliding cavity; 2010, six-edge rod; 2011, wedge groove; 2012, spring two; 300, power assembly; 301, power motor; 302, rotating block; 303, push rod; 304, rotating disc; 305, torsion block; 306, torsion groove; 3061, smooth part; 3062, inclined part; 400, injection assembly; 401, distribution cylinder; 402, bottom blocking disc; 403, discharge outlet; 404, injection pipe; 405, injection frame; 406, flat mouth nozzle; 407, hanging rod; 408, accommodation groove; 409, push derivation frame; 4010, connecting rod; 4011, annular plug; 4012, feed inlet two; 4013, supply pipe; 4014, quick connector; 4015, fixed rod; 500, feeding device; 600, heater. DETAILED DESCRIPTION

[0066] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0067] Please refer to Figures 1-10 The technical solutions provided by the present application specifically include the following embodiments:

[0068] The utility model provides an evaporative crystallization device for sodium sulfate preparation, which comprises a crystallization tank 100, a crystallization auxiliary assembly 200, a power assembly 300 and a spraying assembly 400, the crystallization auxiliary assembly 200 is rotatably arranged in the crystallization tank 100; the crystallization auxiliary assembly 200 comprises a central vertical shaft 201, a bent frame 202, a linear bearing 203, a sliding rod 204, a spreader plate 205, a spring I 206, a derivation plate 207, a jacking rod 208, a hexagonal sliding cavity 209, a hexagonal rod 2010, a wedge groove 2011 and a spring II 2012, the central vertical shaft 201 is rotatably arranged in the crystallization tank 100, the bent frame 202 is fixedly installed on the outer wall of the central vertical shaft 201 in a concentric manner, and there are two bent frames 202 in total, the linear bearing 203 is fixedly installed on the upper and lower parts of the side face of the two bent frames 202 away from the central vertical shaft 201, the sliding rod 204 is slidably installed in the linear bearing 203, the spreader plate 205 is fixedly installed at one end of the upper and lower sliding rods 204 away from the central vertical shaft 201, a 0.5mm gap is formed between the end of the spreader plate 205 and the inner wall of the central vertical shaft 201, the spring I 206 is sleeved on the periphery of the sliding rod 204, the derivation plate 207 is fixedly installed at one end of the upper and lower sliding rods 204 away from the spreader plate 205, the jacking rod 208 is fixedly installed at the middle part of the side face of the two derivation plates 207 close to the central vertical shaft 201, the hexagonal sliding cavity 209 is formed at the top of the central vertical shaft 201 and extends into the central vertical shaft 201, the hexagonal rod 2010 is slidably installed in the hexagonal sliding cavity 209, two wedge grooves 2011 are formed in the lower part of the outer wall of the hexagonal rod 2010, the two wedge grooves 2011 are symmetrically distributed about the center of the hexagonal rod 2010, and correspond to the two jacking rods 208 in position, the end of the jacking rod 208 abuts against the inner wall of the wedge groove 2011, the spring II 2012 is located in the hexagonal sliding cavity 209 and is fixedly installed between the bottom wall of the hexagonal sliding cavity 209 and the bottom of the hexagonal rod 2010, is located at one end of the periphery of the sliding rod 204 close to the central vertical shaft 201, and is fixedly installed between the bent frame 202 and the derivation plate 207, the jacking rod 208 movably penetrates through the side wall of the central vertical shaft 201 and extends into the hexagonal sliding cavity 209, the side part of the crystallization tank 100 is fixedly provided with a feeding device 500, and the periphery of the crystallization tank 100 is fixedly provided with a heater 600.

[0069] Specifically, the sodium sulfate solution is delivered into the spraying assembly 400 by the feeding device 500, and sprayed into the inner wall of the crystallization tank 100 by the spraying assembly 400, while the heater 600 radiates heat to the sidewall of the crystallization tank 100 (the heater 600 can adopt electric heating or gas heating, but is not limited thereto), during which the power assembly 300 drives the central vertical shaft 201 to rotate, which drives the bent frame 202, the linear bearing 203, the slide bar 204 and the paddle 205 to rotate together. Since a 0.5mm gap is provided between the end of the paddle 205 and the inner wall of the crystallization tank 100, the paddle 205 can spread the sodium sulfate solution sprayed on the inner wall of the crystallization tank 100, and at the same time, the paddle 205 can disturb the flow of the sodium sulfate solution and spread the sodium sulfate solution again on the inner wall of the crystallization tank 100, so as to be heated and evaporate the water, and gradually precipitate the crystals.

[0070] Further, with reference to Figure 5 、 Figure 6 illustrated:

[0071] The power assembly 300 includes a power motor 301, a rotating block 302, a lever 303, a rotating disc 304, a torsion block 305 and a torsion groove 306. The power motor 301 is fixedly installed on the top of the crystallization tank 100 through a support. The rotating block 302 is fixedly installed on the output shaft of the power motor 301. The levers 303 are fixedly installed on the outer wall of the rotating block 302 at equal angles, and the number is four. The rotating disc 304 is fixedly installed on the top of the outer wall of the six-prong rod 2010. The torsion blocks 305 are fixedly installed at the edge of the top of the levers 303 at equal angles, and the number is four. The torsion groove 306 is opened in the top of the torsion block 305. The torsion groove 306 includes a smooth part 3061 and an inclined part 3062. The outer wall of the lever 303 is in contact with the inner wall of the torsion groove 306.

[0072] Specifically, the output shaft of the power motor 301 drives the rotating block 302 to rotate together with the four shift rods 303, the four shift rods 303 are in contact with the side walls of the four torsion grooves 306, thereby twisting the rotating disc 304 to rotate, the rotating disc 304 drives the six-rib rod 2010 and the central vertical shaft 201 to rotate, the central vertical shaft 201 drives the bent frame 202, the linear bearing 203, the slide rod 204 and the spreading plate 205 to rotate together, since a 0.5mm gap is arranged between the end of the spreading plate 205 and the inner wall of the crystallization tank 100, the spreading plate 205 can spread the anhydrous sodium sulfate solution sprayed on the inner wall of the crystallization tank 100, at the same time, the spreading plate 205 can disturb the flow of the anhydrous sodium sulfate solution, and the anhydrous sodium sulfate solution is spread on the inner wall of the crystallization tank 100 again, when the anhydrous sodium sulfate solution is completely crystallized, the power motor 301 is started in reverse rotation, and drives the rotating block 302 and the four shift rods 303 to rotate in reverse, the four shift rods 303 slide along the smooth surface 3061 of the inside of the torsion groove 306, gradually contact the inclined surface 3062, thereby generating a wedge effect, pushing the rotating disc 304 and the six-rib rod 2010 along the inner wall of the six-rib sliding cavity 209, causing the spring 2012 to compress and store energy, since the central vertical shaft 201 and the bearing frame 103 are connected through a damping bearing, the shift rod 303 does not cause the central vertical shaft 201 to twist during the contact with the inclined surface 3062, when the shift rod 303 slides along the inclined surface 3062 and contacts the side wall of the torsion groove 306, that is, the rotating disc 304 reaches the lower limit, thereafter, the rotating disc 304, the six-rib rod 2010 and the central vertical shaft 201 are driven to rotate under the resistance of the shift rod 303 and the side wall of the torsion groove 306, since the six-rib rod 2010 moves downward along the inner wall of the six-rib sliding cavity 209, drives the two wedge grooves 2011 to move together, pushes the two jacks 208 outward, the two jacks 208 drive the two push derivation plates 207 to move in reverse, the spring 206 compresses and stores energy, at the same time, the push derivation plate 207 drives the spreading plate 205 to move together under the sliding connection of the slide rod 204 and the linear bearing 203, so that the end of the spreading plate 205 is in contact with the inner wall of the discharge pipe 101, thereby scraping the anhydrous sodium sulfate crystals during the rotation of the central vertical shaft 201, and finally discharging through the discharge pipe 101.

[0073] Further, with reference to Figure 3 , Figure 5 and Figure 8 ,

[0074] The spraying assembly 400 comprises a distribution cylinder 401, a bottom blocking disc 402, a discharge port 403, a spraying pipe 404, a spraying frame 405, a flat nozzle 406, a hanger 407, a giving way groove 408, a pushing frame 409, a connecting rod 4010, an annular plug 4011, a second feeding port 4012, a supply pipe 4013 and a quick connector 4014. The distribution cylinder 401 is fixedly arranged at the upper end inside the crystallization tank 100. The bottom blocking disc 402 is rotatably arranged inside the distribution cylinder 401. A sealing bearing is arranged between the outer wall of the bottom blocking disc 402 and the inner wall of the distribution cylinder 401. The bottom blocking disc 402 is rotatably connected with the distribution cylinder 401 through the sealing bearing. The discharge port 403 is symmetrically arranged about the center of the bottom blocking disc 402 and extends to the bottom of the bottom blocking disc 402. The input end of the spraying pipe 404 is fixedly arranged at the bottom of the discharge port 403 through a joint. The spraying frame 405 is fixedly arranged on the outer wall of the center vertical shaft 201 and is symmetrically arranged about the center of the center vertical shaft 201. The flat nozzle 406 is fixedly arranged inside the spraying frame 405 and is symmetrically arranged about the center of the center vertical shaft 201. The input end of the flat nozzle 406 is fixedly connected with the output end of the spraying pipe 404. The hanger 407 is fixedly arranged between the top of the two bending frames 202 and the bottom of the bottom blocking disc 402. The giving way groove 408 is symmetrically arranged about the center of the center vertical shaft 201 and is connected with the six-rib sliding cavity 209. The giving way groove 408 is in sliding connection with the two pushing frames 409. The connecting rod 4010 is fixedly arranged at the bottom of the two pushing frames 409. The annular plug 4011 is fixedly arranged at the bottom of the two connecting rods 4010 and is in sliding connection with the inner wall of the distribution cylinder 401 through a sealing bushing. The second feeding port 4012 is arranged on the outer wall of the distribution cylinder 401 and extends to the inside of the distribution cylinder 401. The second feeding port 4012 is arranged between the bottom of the annular plug 4011 and the top of the bottom blocking disc 402. The output end of the supply pipe 4013 is fixedly arranged inside the second feeding port 4012 through a joint. The quick connector 4014 is fixedly arranged at the input end of the supply pipe 4013. The top of the crystallization tank 100 is provided with a first feeding port 102. The quick connector 4014 is screwedly connected inside the first feeding port 102. Four fixed rods 4015 are fixedly arranged at the top of the distribution cylinder 401. The top of the four fixed rods 4015 is fixedly arranged on the top wall of the crystallization tank 100. The bottom wall of the crystallization tank 100 is fixedly provided with a bearing frame 103. The center vertical shaft 201 is rotatably connected with the bearing frame 103 through a damping bearing. The bottom of the crystallization tank 100 is fixedly arranged on the discharge pipe 101. The inside of the discharge pipe 101 is in communication with the inside of the crystallization tank 100. The output end of the feeding device 500 is connected with the first feeding port 102 through a pipeline.

[0075] Specifically, when the six-prong rod 2010 moves downward along the inner wall of the six-prong sliding cavity 209, the two connecting rods 4010 and the annular plug 4011 are also driven to move downward along the inner wall of the distribution cylinder 401 by the connecting action of the two push derivation frames 409, so that the annular plug 4011 is plugged at the end of the second feeding port 4012. At this time, the second feeding port 4012 cannot continue to transport the mirabilite solution into the distribution cylinder 401, that is, the two flat-nozzle nozzles 406 stop spraying, so that the spraying of the mirabilite solution is automatically interrupted during the scraping of the mirabilite crystals precipitated on the inner wall of the crystallization tank 100, so as to prevent the precipitated mirabilite crystals from being dissolved again. When the precipitated mirabilite crystals are completely scraped off, the power motor 301 is started again to rotate in the forward direction, so that the push rod 303 slides along the surface of the inclined part 3062 to the surface of the smooth part 3061, and finally abuts against the inner wall of the torsion slot 306 close to the smooth part 3061, so that the downward pushing of the rotating disc 304 is ended. The spring 2012 pushes the six-prong rod 2010, the wedge groove 2011 and the push derivation frame 409 upward to reset. The push derivation frame 409 upwardly resets the annular plug 4011 through the two connecting rods 4010, so that the second feeding port 4012 is opened again to continue to transport the mirabilite solution into the distribution cylinder 401. The two flat-nozzle nozzles 406 continue to spray, and the spring 206 pushes the apron 205 to reset, so that the end part of the apron 205 again restores the gap of 0.5mm with the inner wall of the crystallization tank 100, and continues to flatten the mirabilite solution sprayed on the inner wall of the crystallization tank 100.

[0076] An evaporation crystallization process of an evaporation crystallization device for preparing mirabilite, comprising the following use steps:

[0077] S1, rotate the crystallization auxiliary assembly 200 by driving the power assembly 300, and spray the mirabilite solution on the inner wall of the crystallization tank 100 by the two flat-nozzle nozzles 406 while rotating, and heat the crystallization tank 100 by the heater 600 to evaporate the water;

[0078] S2, flatten the mirabilite solution sprayed on the inner wall of the crystallization tank 100 by the two aprons 205, and interfere with the dripping mirabilite solution to scrape the dripping mirabilite solution on the inner wall of the crystallization tank 100;

[0079] S3, reverse the crystallization auxiliary assembly 200 by driving the power assembly 300, and scrape the mirabilite crystals on the inner wall of the crystallization tank 100 by the two aprons 205, and discharge the mirabilite crystals through the discharge pipe 101.

[0080] The evaporation crystallization device for preparing mirabilite in the scheme works as follows:

[0081] The first step, by feeding device 500 to the inside of the feed port 102 to transport the solution of the meta-ming powder, then the meta-ming powder solution through the fast connection 4014, supply pipe 4013 and feed port two 4012 into the inside of the distribution cylinder 401, and located in the bottom of the top of the disc 402 and the bottom of the annular plug 4011 area, and through the two discharge port 403 and two spray pipe 404 connection, finally from the two flat mouth nozzle 406 spray end to the inner wall of the crystallization tank 100 spray, with this, the heater 600 to the side wall of the crystallization tank 100 radiation heat (heater 600 can use electric heating or gas heating, but not limited to), while the output shaft of the power motor 301 drive block 302 together with four dials 303 rotation, four dials 303 with four torsion slot 306 side wall contact, thus twist the rotary disc 304 rotation, rotary disc 304 rotation driven six prism rod 2010 and the center vertical shaft 201 rotation, the center vertical shaft 201 rotation driven bent frame 202, linear bearing 203, slide bar 204 and the deck 205 together rotation, because the deck 205 end with the inner wall of the crystallization tank 100 between the 0.5mm gap, therefore, the deck 205 rotation can be sprayed on the inner wall of the crystallization tank 100 meta-ming powder solution deck flat, at the same time to the meta-ming powder solution of the flow of the flow effect, and will flow of the meta-ming powder solution again deck to the inner wall of the crystallization tank 100, so heated, make its water evaporation, gradually precipitate the crystal;

[0082] Second step, when the mirabilite solution completely crystallize, start power motor 301 reverse rotation, and drive the rotating block 302 and four shift rod 303 reverse rotation, four shift rod 303 along the torsion slot 306 inside the smooth part 3061 surface sliding, gradually with the inclined part 3062 surface contact, thus produce wedge effect, will turntable 304 along with six prism rod 2010 in six prism slide cavity 209 inner wall down, cause spring two 2012 compression force storage, and because the center vertical shaft 201 and bearing frame 103 through the damping bearing connection, therefore, shift rod 303 and inclined part 3062 contact period, will not cause the center vertical shaft 201 torsion, when shift rod 303 along the inclined part 3062 surface sliding with torsion slot 306 side wall contact, that is, turntable 304 to reach the lower stop point, after that in the shift rod 303 outer wall and torsion slot 306 side wall under the action of resistance, drive turntable 304, six prism rod 2010 and center vertical shaft 201 rotation, and because the six prism rod 2010 along the six prism slide cavity 209 inner wall down, drive two wedge groove 2011 together, will move two jacks 208 to the periphery, two jacks 208 drive two push rod 207 reverse movement, spring one 206 compression force storage, at the same time, push derivation plate 207 in the sliding rod 204 and linear bearing 203 sliding connection together with the movement of the board 205, make the board 205 end and discharge pipe 101 inner wall resistance, thus in the process of rotating with the center vertical shaft 201, scraping out of the mirabilite crystal, finally through the discharge pipe 101 discharge;

[0083] It should be noted that, in the second step process, when the six prism rod 2010 along the six prism slide cavity 209 inner wall down, also through the connection effect of two push derivation frame 409 drive two connecting rod 4010 and ring plug 4011 along the inside wall of the cylinder 401 down, make ring plug 4011 plug in the end of the inlet two 4012, at this time, inlet two 4012 can't continue to transport mirabilite solution into the cylinder 401 inside, that is to say, two flat mouth nozzle 406 stop spraying, so that in the crystallization tank 100 wall on the scraping out of the mirabilite crystal, automatic interrupt mirabilite solution injection, to prevent the precipitation of mirabilite crystal again wet and dissolve;

[0084] Third step, when the precipitated anhydrous sodium sulfate crystal is completely scraped off, the power motor 301 is started again to rotate forward, the push rod 303 slides along the surface of the inclined part 3062 to the surface of the smooth part 3061, finally abuts against the inner wall of the torsion slot 306 close to the side of the smooth part 3061, thereby ending the pushing of the rotating disc 304 downward, the rebound force of the spring two 2012 pushes the six-rib rod 2010, the wedge slot 2011 and the push rod 409 upward to reset, the upward reset of the push rod 409 drives the annular plug 4011 upward to reset through the two connecting rods 4010, the feeding port two 4012 is opened again, the anhydrous sodium sulfate solution continues to be transported into the distribution cylinder 401, the two flat nozzle nozzles 406 continue to spray, at the same time, the rebound force of the spring one 206 pushes the push plate 205 to reset, so that the end part thereof restores to the 0.5mm gap with the inner wall of the crystallizing tank 100 again, the anhydrous sodium sulfate solution sprayed on the inner wall of the crystallizing tank 100 is flattened continuously.

[0085] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An evaporative crystallization apparatus for sodium sulfate production, characterized by: Comprise: Crystallization tank (100); Crystallization auxiliary assembly (200) is rotationally arranged inside the crystallization tank (100); The crystallization auxiliary assembly (200) comprises: Center vertical shaft (201) is rotationally arranged inside the crystallization tank (100); Bent frame (202) is fixedly installed on the outer wall of the center vertical shaft (201) with central symmetry, and there are two; Linear bearing (203) is fixedly installed on the upper and lower sides of the two bent frames (202) away from the center vertical shaft (201); Slide rod (204) is slidingly installed inside the linear bearing (203); The spreader (205) is fixedly installed at one end of the upper and lower two slide rods (204) away from the center vertical shaft (201), and a 0.5mm gap is provided between the end of the spreader (205) and the inner wall of the center vertical shaft (201); Spring one (206) is sleeved on the outer periphery of the slide rod (204); The deduced plate (207) is fixedly installed at one end of the upper and lower two slide rods (204) away from the spreader (205); The top rod (208) is fixedly installed at the middle of the side of the two deduced plates (207) close to the center vertical shaft (201); Six slide cavities (209) are opened at the top of the center vertical shaft (201) and extend into the interior thereof; Six prismatic rods (2010) are slidingly installed inside the six slide cavities (209), two wedge grooves (2011) are opened at the lower part of the outer wall of the six prismatic rods (2010), the two wedge grooves (2011) are symmetrically distributed about the center of the six prismatic rods (2010), and correspond to the two top rods (208) one by one, and the end of the top rod (208) is in contact with the inner wall of the wedge groove (2011); Further comprising a power assembly (300), the power assembly (300) comprises: Power motor (301) is fixedly installed on the top of the crystallization tank (100) through the support; Rotary block (302) is fixedly installed on the output shaft of the power motor (301); Dial lever (303) is fixedly installed on the outer wall of the rotary block (302) at equal angles, and the number is four; Rotating disc (304) is fixedly installed on the top of the outer wall of the six prismatic rods (2010); Torsion block (305) is fixedly installed at the edge of the top of the dial lever (303) at equal angles, and the number is four; Torsion groove (306) is opened at the top of the torsion block (305), the torsion groove (306) comprises a smooth part (3061) and an inclined part (3062), and the outer wall of the dial lever (303) is in contact with the inner wall of the torsion groove (306).

2. The evaporative crystallization device for preparing anhydrous sodium sulfate according to claim 1, wherein: The crystallization auxiliary assembly (200) further comprises: Spring two (2012) is located inside the six slide cavities (209) and is fixedly installed between the bottom wall of the six slide cavities (209) and the bottom of the six prismatic rods (2010).

3. The evaporative crystallization device for preparing anhydrous sodium sulfate according to claim 2, wherein: Further comprising a spraying assembly (400), the spraying assembly (400) comprises: The cloth cylinder (401) is fixedly arranged inside the upper end of the crystallization tank (100); A bottom blocking disc (402) is rotatably installed inside the distribution cylinder (401), a sealing bearing is arranged between the outer wall of the bottom blocking disc (402) and the inner wall of the distribution cylinder (401), and the bottom blocking disc (402) is rotatably connected with the distribution cylinder (401) through the sealing bearing; A discharge port (403) is symmetrically arranged on the top of the bottom blocking disc (402) and extends to the bottom of the bottom blocking disc (402); A spray pipe (404) is fixedly installed at the bottom of the discharge port (403) through a joint; Two spray frames (405) are fixedly installed on the outer wall of the center vertical shaft (201) and are symmetrically arranged about the center of the center vertical shaft (201); Two flat-nozzle nozzles (406) are fixedly installed in the two spray frames (405) and are symmetrically arranged about the center of the center vertical shaft (201), and the input end of the flat-nozzle nozzle (406) is fixedly connected with the output end of the spray pipe (404).

4. The evaporation crystallization device for preparing anhydrous sodium sulfate according to claim 3, wherein the spray assembly (400) further comprises: A hanger rod (407) is fixedly installed between the top of the two bent frames (202) and the bottom of the bottom blocking disc (402); A yielding slot (408) is symmetrically arranged on the outer wall of the center vertical shaft (201) and is in communication with the inner part of the six-ribbed sliding cavity (209), and the number of the yielding slots (408) is two; A deducing frame (409) is fixedly installed on the lower part of the outer wall of the six-ribbed rod (2010) and is in sliding connection with the two yielding slots (408); A connecting rod (4010) is fixedly installed at the bottom of the two deducing frames (409); An annular plug (4011) is fixedly installed at the bottom of the two connecting rods (4010) and is in sliding connection with the inner wall of the distribution cylinder (401) through a sealing bushing.

5. The evaporation crystallization device for preparing anhydrous sodium sulfate according to claim 4, wherein the spray assembly (400) further comprises: A second feeding port (4012) is arranged on the outer wall of the distribution cylinder (401) and extends to the inner part of the distribution cylinder (401), and the second feeding port (4012) is located between the bottom of the annular plug (4011) and the top of the bottom blocking disc (402); A supply pipe (4013) is fixedly installed at the inner part of the second feeding port (4012) through a joint; A quick connector (4014) is fixedly installed on the input end of the supply pipe (4013), a first feeding port (102) is arranged on the top of the crystallization tank (100), and the quick connector (4014) is threadedly screwed into the inner part of the first feeding port (102).

6. The evaporation crystallization device for preparing anhydrous sodium sulfate according to claim 5, wherein the spring (206) is fixedly installed between the bent frame (202) and the deducing plate (207) at one end of the outer periphery of the sliding rod (204) close to the center vertical shaft (201), and the top rod (208) is movably penetrated through the side wall of the center vertical shaft (201) and extends to the inner part of the six-ribbed sliding cavity (209). ​ ​ ​ 7. The evaporation crystallization device for preparing sodium sulfate according to claim 6, characterized in that: The top of the distribution cylinder (401) is fixedly provided with four fixed rods (4015) distributed at equal angles, and the top of the four fixed rods (4015) is fixedly provided on the top wall of the crystallization tank (100).

8. The evaporation crystallization device for preparing sodium sulfate according to claim 7, characterized in that: The bottom wall of the crystallization tank (100) is fixedly provided with a bearing bracket (103), the central vertical shaft (201) is rotatably connected with the bearing bracket (103) through a damping bearing, the bottom of the crystallization tank (100) is fixedly provided with a discharge pipe (101), the inside of the discharge pipe (101) is connected with the inside of the crystallization tank (100), the side of the crystallization tank (100) is fixedly provided with a feeding device (500), the output end of the feeding device (500) is connected with the feeding port one (102) through a pipeline, and the periphery of the crystallization tank (100) is fixedly provided with a heater (600).

9. The evaporation crystallization process of an evaporative crystallization device for sodium sulfate preparation according to claim 8, characterized in that: The following steps are included: S1, the power assembly (300) drives the crystallization auxiliary assembly (200) to rotate, the two flat nozzle (406) sprays sodium sulfate solution to the inner wall of the crystallization tank (100) while rotating, and the heater (600) heats the crystallization tank (100) to evaporate water; S2, the two spreaders (205) spread the sodium sulfate solution sprayed on the inner wall of the crystallization tank (100), and interfere with the running sodium sulfate solution, so that the running sodium sulfate solution is scraped and wiped on the inner wall of the crystallization tank (100); S3, the power assembly (300) drives the crystallization auxiliary assembly (200) to reverse, the two spreaders (205) scrape the sodium sulfate crystals from the inner wall of the crystallization tank (100), and discharge them through the discharge pipe (101).

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