A method for preparing crystals in a sodium stannate production process

Abstract

The application discloses a method for preparing crystals in a sodium stannate production process, which comprises the following steps: adding a sodium stannate solution into a sodium stannate crystallization device, heating and concentrating to reach a saturation concentration, and then adding an alkaline substance to make sodium stannate crystallize and precipitate. The sodium stannate crystallization device comprises a reaction bin, a discharging mechanism and a stirring mechanism. In the application, the alkaline substance is placed on a discharging table, and then is sent to the outside of a screw post through a screw. A transmission belt drives a worm to rotate under the rotation of a motor. The teeth of the side wall of the worm drive a worm wheel to rotate. The screw post starts to rotate under the drive of the worm wheel. The threads on the outer wall of the screw post can transport the objects on the object table to a feeding pipe. The objects enter the reaction bin through the feeding pipe. The work of the staff is simple, and the work efficiency is improved. The transportation of the reaction substances by the screw post can be controlled through the motor. The amount of the reaction substances can be controlled by rotating the motor output end by a specific number of times, and the work efficiency is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of inorganic tin chemical industry, in particular to a method for preparing crystals in the production process of sodium stannate. BACKGROUND

[0002] Sodium stannate is mainly used for alkaline tin plating and copper plating in the electroplating industry, as well as electroplating and chemical plating of tin alloy, zinc-tin alloy, aluminum alloy and other alloys. It is used as a fire retardant and a weight enhancer in the textile industry. It is used as a mordant in the printing and dyeing industry. It is also used in the glass, ceramic and other industries.

[0003] In the preparation process of sodium stannate, there are some obvious problems, such as in the preparation of sodium stannate, a certain amount of reactants needs to be weighed and then put into the reaction kettle for reaction. This method is accurate in dosage, but the efficiency is low, and the reactants cannot be added at any time. Generally, the reaction kettle lacks a stirring device, causing incomplete chemical reaction. After the reaction is completed, the reaction kettle is also difficult to clean due to the relatively narrow bottle opening, and the residual impurities can reduce the success rate of sodium stannate production. SUMMARY

[0004] To solve the above technical problems, the present application provides a method for preparing crystals in the production process of sodium stannate, which adopts a sodium stannate crystallization device with reasonable structure. The device is convenient and fast to feed, and the stirring is more uniform, which can improve the result efficiency of sodium stannate crystals.

[0005] The technical solution to solve the above technical problems is: a method for preparing crystals in the production process of sodium stannate, sodium stannate solution is added to a sodium stannate crystallization device, first heated and concentrated to reach saturation concentration, then add alkaline substances, so that sodium stannate crystallizes and precipitates, the sodium stannate crystallization device comprises a reaction bin, a heating mechanism is arranged in the reaction bin, a protective shell is fixedly connected to the top wall of the reaction bin, a machine bin is fixedly connected to the top wall of the protective shell, a motor is fixedly connected to the bottom wall of the machine bin, the motor comprises an upper output end and a lower output end, and a discharge port is arranged on the bottom side wall of the reaction bin.

[0006] It also includes a discharging mechanism, the discharging mechanism includes a worm installed on the bottom side wall of the machine bin, the outer wall of the worm is engaged with a worm gear, the side wall of the worm gear is fixedly connected with a stud, the outer wall of the stud is sleeved with a feeding bin, a screw rod is penetratingly arranged on the bottom outer wall of the feeding bin, the screw rod penetrates the bottom outer wall of the feeding bin and extends to the inside, the extension part of the screw rod is fixedly connected with a discharging table, and the outer wall of the discharging table is slidingly connected with the inner wall of the feeding bin. Wherein, the worm is connected with the upper output end of the motor through a transmission belt.

[0007] The stirring mechanism comprises a plurality of stirring fans sleeved on the outer wall of the lower output end of the motor, the plurality of stirring fans are arranged in the reaction bin, a rotating shaft is rotatably connected to the inner wall of each stirring fan at the center axis, a plurality of stirring blades are fixedly connected to the outer wall of the rotating shaft, the end of the rotating shaft away from the protective shell penetrates the inner wall of the stirring fan and extends to the outside, a gear one is fixedly connected to the outer wall of the extending portion of the rotating shaft, a gear two is fixedly connected to the upper wall of the bottom of the reaction bin at the center axis, and the gear one is engaged with the gear two.

[0008] Further, the discharging mechanism further comprises a feeding pipe penetrating the outer wall of the feeding bin, and the end of the feeding pipe penetrating the outer wall of the feeding bin extends to the top lower wall of the reaction bin.

[0009] Further, the inner part of the protective shell is provided with a gas collecting mechanism, the gas collecting mechanism comprises an eccentric wheel fixedly connected to the outer wall of the lower output end of the motor, the outer wall of the eccentric wheel is provided with a limiting frame, the inner wall of the limiting frame is slidably connected with the outer wall of the eccentric wheel, a telescopic column is fixedly connected to the side wall of the limiting frame at the center axis, a gas cylinder is slidably connected to the outer wall of the telescopic column, the end of the gas cylinder away from the limiting frame penetrates the protective shell and extends to the outside, and the extending portion of the protective shell is fixedly connected with a gas collecting barrel.

[0010] The side outer wall of the gas cylinder close to the gas collecting barrel is provided with an air inlet cylinder penetratingly, the end of the air inlet cylinder away from the gas cylinder penetrates the bottom of the protective shell and extends to the top lower wall of the reaction bin, a plurality of through holes are formed in the lower wall of the extending portion of the air inlet cylinder, and the inner wall of each through hole is fixedly connected with a one-way valve one.

[0011] Further, the inner part of the protective shell is further provided with a cleaning mechanism, the cleaning mechanism comprises a water inlet ring sleeved on the outer wall of the lower output end of the motor, a U-shaped hole is formed in the outer wall of the motor, the inner part of the water inlet ring is in communication with the U-shaped hole, a water delivery pipe is fixedly connected to the end of the U-shaped hole away from the water inlet ring, a through hole is formed in the top of the stirring fan, and the end of the water delivery pipe away from the U-shaped hole penetrates the top upper wall of the stirring fan and extends to the through hole.

[0012] Further, the cleaning mechanism further comprises a telescopic cylinder sleeved on the outer wall of each stirring fan, a spring is fixedly connected to the inner side wall of each telescopic cylinder, the end of each spring close to the stirring fan is fixedly connected to the outer wall of the stirring fan, a scraper is fixedly connected to the outer side wall of each telescopic cylinder, a through hole is formed in the top side wall of the scraper, and a one-way valve two is fixedly connected to the inner part of the through hole.

[0013] Further, the cleaning mechanism further comprises a liquid storage bin fixedly connected to the inner wall of the machine bin, a first hose is arranged through the bottom of the liquid storage bin, one end of the first hose away from the liquid storage bin penetrates through the shell and extends to the inside, a telescopic switch is fixedly connected to the extension of the first hose, the side wall of the telescopic switch is fixedly connected to the outer wall of the limiting frame, a second hose is arranged through the bottom lower wall of the telescopic switch, one end of the second hose away from the telescopic switch penetrates through the top upper wall of the reaction bin and extends to the inside, and the extension of the second hose penetrates through the outer wall of the water inlet ring.

[0014] Further, the telescopic switch comprises an outer shell fixedly connected to the side wall of the limiting frame, an electric telescopic rod is fixedly connected to the inside of the outer shell, a rubber strip is fixedly connected to the upper wall of the electric telescopic rod, rubber wheels are slidingly connected to the outer walls on both sides of the rubber strip, a top rod is fixedly connected to the upper wall of each rubber wheel, and each top rod is rotatably connected to the top upper wall of the outer shell.

[0015] Further, a compression mechanism is arranged outside the telescopic switch, the compression mechanism comprises a plunger pump fixedly connected to the top upper wall of the reaction bin, an oscillating frame is fixedly connected to the outer wall of the plunger pump, a third hose is arranged through one side of the outer wall of the plunger pump, one end of the third hose away from the plunger pump penetrates through the outer wall of the second hose and extends to the inside, a fourth hose is arranged through one side of the outer wall of the plunger pump away from the third hose, and one end of the fourth hose away from the plunger pump penetrates through the outer wall of the feeding bin and extends to the inside.

[0016] Further, the sodium stannate solution is added into the reaction bin of the sodium stannate crystallization device from the feeding port, the sodium stannate solution is heated and concentrated to reach the saturated concentration, then the alkaline substance is added into the reaction bin from the discharging table, and the sodium stannate solution and the alkaline substance are mixed by stirring to precipitate sodium stannate crystals.

[0017] Compared with the prior art, the beneficial effects of the present application are:

[0018] (1) The present application adds sodium stannate solution from the feeding port first when making sodium stannate, heats and concentrates to reach the saturation concentration, then places the prepared alkaline material on the discharging table, and then sends it to the outside of the screw post through the screw, after the upper output end of the motor is opened, the transmission belt drives the worm to rotate under the rotation of the motor, the gear teeth of the worm sidewall drive the worm wheel to rotate, the screw post starts to rotate under the drive of the worm wheel, when the screw post rotates, the threads on the outer wall of the screw post can transport the objects on the object placing table to the feeding pipe, and then the objects enter the reaction bin through the feeding pipe, the workers only need to place the reactants, the work is simple and conducive to the improvement of efficiency, and the transportation of the reactants by the screw post can be controlled by the motor, so that the amount of the reactants can be controlled by the rotation of the motor output end, if it is needed to speed up the feeding speed, the motor speed can be accelerated, the operation is convenient, and the working efficiency is further improved. In the crystallization process, the crystallization condition is observed through the observation window, and the alkaline substance can be added at any time according to the crystallization, so that the feeding is convenient and fast.

[0019] (2) When the reactants need to be fully reacted, the lower output end of the motor is opened after the reactants are placed, and the stirring fan starts to rotate under the drive of the motor. Since gear one and gear two are engaged, and gear two is fixed at the bottom of the reaction bin, when the stirring fan rotates with gear one, gear one rotates by engaging with gear two, thereby driving the stirring blades on the rotating rod to achieve the purpose of stirring. The stirring of the stirring blades can make the various reactants fully react, thereby improving the yield and success rate of sodium stannate.

[0020] (3) When the upper output end of the motor rotates, the eccentric wheel also rotates, the limiting frame starts to reciprocate under the extrusion of the eccentric wheel, so that the telescopic column reciprocates, thereby extruding the air in the air cylinder. When the telescopic column moves towards the side close to the limiting frame, the air cylinder is under negative pressure, then starts to absorb the gas in the reaction bin. Conversely, the air cylinder is under positive pressure. Due to the action of the one-way valve one, the air cylinder cannot exhaust, and the air cylinder extrudes the gas to the gas collecting barrel. Under the reciprocating motion of the limiting frame, the gas in the reaction bin is gradually absorbed, thereby realizing the treatment of the reaction gas, and making the production process of sodium stannate more environmentally friendly and harmless.

[0021] (4) The sodium stannate crystallization device adopted by the present application controls the telescopic switch, and the electric telescopic rod is retracted, so that the soft tube one and the soft tube two are connected, the cleaning liquid in the liquid storage bin flows into the water inlet ring, and then flows into the through hole at the top of the stirring fan through the U-shaped hole and the water conveying pipe, and then flows out through the one-way valve two on the scraper. Since the scraper is tightly attached to the inner wall of the reaction bin under the action of the telescopic cylinder, the cleaning liquid can flow out to the inner wall of the reaction bin when the scraper cleans the reaction bin, so that the cleaning of the reaction bin by the scraper is more thorough, and the cleanliness of the reaction bin is effectively maintained. The residues of these reaction liquids can be cleaned after the cleaning liquid is added, thereby ensuring the cleanliness of the feeding bin and the reaction bin.

[0022] (5), the rubber strip drives the rotation of the rubber wheel on both sides when the electric telescopic rod is retracted, the top rod rotates to both sides of the telescopic switch after the rotation of the rubber wheel, when the electric telescopic rod is retracted, the top rod is in a straight line, and when the telescopic switch reciprocates in the limiting frame, the top rod is pressed against the swing frame, and the swing frame reciprocates, the reciprocation of the swing frame provides power for the plunger pump, so that a part of the cleaning liquid in the hose two is absorbed to the hose four through the hose three, and then flows into the feeding bin through the hose four, so that the inside of the feeding bin is cleaned, further impurities in the reaction process are discharged, and the production efficiency of sodium stannate is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The whole structure schematic diagram of the sodium stannate crystallization device used by the present application.

[0024] Figure 2 The whole structure schematic diagram (showing the internal structure, omitting the feeding port) of the sodium stannate crystallization device used by the present application.

[0025] Figure 3 The discharging mechanism structure schematic diagram of the sodium stannate crystallization device used by the present application.

[0026] Figure 4 The stirring mechanism schematic diagram of the sodium stannate crystallization device used by the present application.

[0027] Figure 5 The gas collecting mechanism schematic diagram of the sodium stannate crystallization device used by the present application.

[0028] Figure 6 The cleaning mechanism partial schematic diagram of the sodium stannate crystallization device used by the present application.

[0029] Figure 7 The cleaning mechanism partial sectional view of the sodium stannate crystallization device used by the present application.

[0030] Figure 8 The compression cylinder sectional view of the sodium stannate crystallization device used by the present application.

[0031] Figure 9 The compression switch schematic diagram of the sodium stannate crystallization device used by the present application.

[0032] Figure 10 The telescopic mechanism structure schematic diagram of the sodium stannate crystallization device used by the present application.

[0033] In the drawing: 1, reaction bin; 11, protective shell; 12, machine bin; 13, motor; 14, discharge port; 15, feeding port; 16, observation window.

[0034] 2, discharging mechanism; 201, worm; 202, worm gear; 203, stud; 204, feeding bin; 205, screw; 206, discharging table; 207, transmission belt; 208, inlet pipe.

[0035] 3, stirring mechanism; 301, stirring fan; 302, rotating rod; 303, stirring blade; 304, gear one; 305, gear two.

[0036] 4, gas collecting mechanism; 401, eccentric wheel; 402, limiting frame; 403, telescopic column; 404, air cylinder; 405, gas collecting barrel; 406, air inlet cylinder; 407, one-way valve one.

[0037] 5, cleaning mechanism; 501, water inlet ring; 502, U-shaped hole; 503, water delivery pipe; 504, telescopic cylinder; 505, spring; 506, scraper; 507, one-way valve two; 508, liquid storage bin; 509, hose one; 510, telescopic switch; 511, hose two; 512, outer shell; 513, electric telescopic rod; 514, rubber strip; 515, rubber wheel; 516, ejector rod.

[0038] 6, compression mechanism; 601, plunger pump; 602, swinging frame; 603, hose three; 604, hose four. DETAILED DESCRIPTION

[0039] The present application is further described in detail by the following drawings and specific embodiments. The embodiments of the present application are given for illustration only and are not exhaustive or limiting of the present application. Many modifications and variations of the present application are possible in light of its teachings. The embodiments are chosen and described in order to best explain the principles of the present application and its practical application and to thereby enable others skilled in the art to best utilize the present application in various embodiments and with various modifications being suited to the particular use contemplated. Embodiment 1:

[0040] Please refer to Figures 1-5The application discloses a method for preparing crystals in a sodium stannate production process. Sodium stannate solution is added into a sodium stannate crystallization device, heated and concentrated to reach saturation concentration, and then an alkaline substance (sodium hydroxide) is added to make sodium stannate crystallize and precipitate. The sodium stannate crystallization device comprises a reaction bin 1. The reaction bin 1 is a place where the reaction occurs. A heating mechanism (not shown in the figure) is arranged in the reaction bin 1. The top wall of the reaction bin 1 is fixedly connected with a protective shell 11. The top wall of the protective shell 11 is fixedly connected with a machine bin 12. The bottom wall of the machine bin 12 is fixedly connected with a motor 13 at the middle shaft. The motor 13 provides power for the whole device. The motor comprises an upper output end and a lower output end. A discharge port 14 is arranged on the bottom side wall of the reaction bin 1. The discharge port 14 is used for discharging cleaning liquid and reaction substances after the reaction is completed.

[0041] The device further comprises a discharging mechanism 2. The discharging mechanism 2 comprises a worm 201 arranged on the bottom side wall of the machine bin 12. The outer wall of the worm 201 is engaged with a worm gear 202. The worm gear 202 is driven to rotate by the teeth of the side wall of the worm 201. The side wall of the worm gear 202 is fixedly connected with a stud 203 at the middle shaft. The stud 203 can rotate under the driving of the worm gear 202. The outer wall of the stud 203 is sleeved with a feeding bin 204. The bottom outer wall of the feeding bin 204 is penetrated by a screw rod 205. The screw rod 205 penetrates the bottom outer wall of the feeding bin 204 and extends into the interior. The extending portion of the screw rod 205 is fixedly connected with a discharging table 206. The outer wall of the discharging table 206 is slidably connected with the inner wall of the feeding bin 204. The prepared materials are placed on the discharging table 206, and then the materials are sent to the outer side of the stud 203 through the screw rod 205. The top outer wall of the worm 201 is sleeved with a transmission belt 207. The transmission belt 207 is sleeved with the outer wall of the upper output end of the motor 13 away from the worm 201. When the upper output end of the motor 13 is turned on, the transmission belt 207 can drive the worm 201 to rotate under the rotation of the motor 13.

[0042] The stirring mechanism 3 comprises a plurality of stirring fans 301 sleeved on the outer wall of the lower output end of the motor 13, the stirring fans 301 are arranged in the reaction bin 1, the inner wall of each stirring fan 301 is rotationally connected with a rotating rod 302 at the middle axis, the outer wall of the rotating rod 302 is fixedly connected with a plurality of stirring blades 303, the rotating rod 302 can drive the stirring blades 303 to rotate, the end of the rotating rod 302 away from the shell 11 penetrates the inner wall of the stirring fan 301 and extends to the outside, the outer wall of the extending part of the rotating rod 302 is fixedly connected with a gear one 304, the gear two 305 is fixedly connected to the upper wall of the bottom of the reaction bin 1 at the middle axis, the gear one 304 is engaged with the gear two 305, the stirring fan 301 starts to rotate under the driving of the motor 13, the gear one 304 and the gear two 305 are engaged, the gear two 305 is fixed on the bottom of the reaction bin 1, when the stirring fan 301 rotates with the gear one 304, the gear one 304 rotates by engaging with the gear two 305, thereby driving the stirring blades 303 on the rotating rod 302 to achieve the purpose of stirring.

[0043] The discharging mechanism 2 further comprises a feeding pipe 208 penetrating the outer wall of the feeding bin 204, one end of the feeding pipe 208 penetrating the outer wall of the shell 11 and extending to the lower wall of the top of the reaction bin 1, the outer wall of the stud 203 can transport the object on the object table to the feeding pipe 208 when the stud 203 rotates, and then the object enters the reaction bin 1 through the feeding pipe 208.

[0044] The inside of the shell 11 is provided with a gas collecting mechanism 4, which comprises an eccentric wheel 401 fixedly connected to the outer wall of the lower side output end of the motor 13. The outer wall of the eccentric wheel 401 is provided with a limiting frame 402, and the inner wall of the limiting frame 402 is in sliding connection with the outer wall of the eccentric wheel 401. The purpose of this arrangement is that when the stirring fan 301 rotates, the eccentric wheel 401 rotates, and the limiting frame 402 can reciprocate under the extrusion of the eccentric wheel 401. The side wall of the limiting frame 402 is fixedly connected with an extension column 403 at the central axis, and the outer wall of the extension column 403 is in sliding connection with an air cylinder 404. The purpose of this arrangement is that the reciprocating movement of the limiting frame 402 causes the extension column 403 to reciprocate, thereby extruding the air in the air cylinder 404. The end of the air cylinder 404 away from the limiting frame 402 penetrates the shell 11 and extends to the outside. The extension of the shell 11 is fixedly connected with a gas collecting barrel 405, which is provided with an exhaust valve (not shown in the figure). The purpose of this arrangement is that the air cylinder 404 extrudes the gas to the gas collecting barrel 405, and under the reciprocating movement of the limiting frame 402, the gas in the reaction chamber 1 is gradually absorbed, thereby realizing the treatment of the reaction gas. The outer wall of the side of the air cylinder 404 close to the gas collecting barrel 405 is provided with an air inlet cylinder 406, and the end of the air inlet cylinder 406 away from the air cylinder 404 penetrates the bottom of the shell 11 and extends to the lower wall of the top of the reaction chamber 1. The extension of the air inlet cylinder 406 is provided with a plurality of through holes in the lower wall, and the inner wall of each through hole is fixedly connected with a one-way valve one 407. The purpose of this arrangement is that when the extension column 403 moves towards the limiting frame 402, the air cylinder 404 is under negative pressure, and then starts to absorb the gas in the reaction chamber 1. Conversely, the air cylinder 404 is under positive pressure, and due to the action of the one-way valve one 407, the air inlet cylinder 406 cannot exhaust, and the air cylinder 404 extrudes the gas to the gas collecting barrel 405. Example 2:

[0045] The difference between this embodiment and the sodium stannate crystallization device used in example 1 is that:

[0046] Please refer to Figures 1-10 The inside of the shell 11 is also provided with a cleaning mechanism 5, which comprises a water inlet ring 501 sleeved on the outer wall of the output end of the motor 13. The outer wall of the lower side output end of the motor 13 is provided with a U-shaped hole 502, and the inside of the water inlet ring 501 is in communication with the U-shaped hole 502. The purpose of this arrangement is to deliver the cleaning liquid to the U-shaped hole 502 through the water inlet ring 501. The end of the water inlet ring 501 away from the U-shaped hole 502 is fixedly connected with a water delivery pipe 503. The top of the stirring fan 301 is provided with a through hole, and the end of the water delivery pipe 503 away from the U-shaped hole 502 penetrates the top wall of the stirring fan 301 and extends to the through hole. The purpose of this arrangement is that the cleaning liquid can enter the through hole in the top of the stirring fan 301 through the U-shaped hole 502 and the water delivery pipe 503, that is, the through hole of the stirring fan is in communication with the water delivery pipe.

[0047] The cleaning mechanism 5 further comprises an elastic cylinder 504 sleeved on the protrusion of the outer wall of each stirring fan 301, the inner side wall of each elastic cylinder 504 is fixedly connected with a spring 505, one end of each spring 505 close to the stirring fan 301 is fixedly connected to the outer wall of the stirring fan 301, which is designed to enable the elastic cylinder 504 to stretch and retract, the outer side wall of each elastic cylinder 504 is fixedly connected with a scraper 506, which is designed to enable the elastic cylinder 504 to tightly attach the scraper 506 to the inner wall of the reaction bin 1, the top side wall of the scraper 506 is provided with a through hole, the inner side wall of the through hole is fixedly connected with a one-way valve 507, which is designed to prevent the liquid in the reaction bin 1 from flowing back into the through hole of the stirring fan 301.

[0048] The cleaning mechanism 5 further comprises a liquid storage bin 508 fixedly connected to the inner wall of the machine bin 12, which is designed to store the cleaning liquid, the liquid storage bin 508 is provided with a cover for facilitating the addition of cleaning liquid. The bottom of the liquid storage bin 508 is provided with a hose 509, which is designed to enable the hose 509 to transport the cleaning liquid, one end of the hose 509 away from the liquid storage bin 508 penetrates through the protective shell 11 and extends into the interior, the extension of the hose 509 is fixedly connected with a telescopic switch 510, which is designed to control the flow of cleaning liquid by using the telescopic switch 510, the side wall of the telescopic switch 510 is fixedly connected to the outer wall of the limiting frame 402, which is designed to enable the telescopic switch 510 to move back and forth with the limiting frame 402, the bottom lower wall of the telescopic switch 510 is provided with a hose 511, one end of the hose 511 away from the telescopic switch 510 penetrates through the top upper wall of the reaction bin 1 and extends into the interior, the extension of the hose 511 penetrates through the outer wall of the water inlet ring 501 and communicates with the water inlet ring, which is designed to transport the cleaning liquid into the water inlet ring 501 by using the hose 511.

[0049] The telescopic switch 510 comprises an outer shell 512 fixedly connected to the side wall of the limiting frame 402, the inner side wall of the outer shell 512 is fixedly connected with an electric telescopic rod 513, which is designed to realize the remote control of the telescopic switch 510 by using the electric telescopic rod 513, the upper wall of the electric telescopic rod 513 is fixedly connected with a rubber strip 514, the outer walls of the two sides of the rubber strip 514 are slidably connected with rubber wheels 515, which is designed to enable the rubber strip 514 to drive the rotation of the two rubber wheels 515 when the electric telescopic rod 513 is retracted, the upper wall of each rubber wheel 515 is fixedly connected with a top rod 516, each top rod 516 is rotatably connected to the top upper wall of the outer shell 512, which is designed to enable the rubber wheels 515 to rotate and the top rods 516 to rotate to the two sides of the telescopic switch 510 after the rotation of the rubber wheels 515, and the top rods 516 to be in a straight line when the electric telescopic rod 513 is fully retracted.

[0050] The outer part of the telescopic switch 510 is provided with a compression mechanism 6, which includes a plunger pump 601 fixedly connected to the top wall of the reaction bin 1. The outer wall of the plunger pump 601 is fixedly connected with a swing frame 602. The purpose of this arrangement is that when the top rod 516 reciprocates with the telescopic switch 510 in the limiting frame 402, the top rod 516 pushes against the swing frame 602, and the swing frame 602 reciprocates. The reciprocating movement of the swing frame 602 provides power for the plunger pump 601. The outer wall of one side of the plunger pump 601 is provided with a soft tube three 603. The end of the soft tube three 603 away from the plunger pump 601 penetrates the outer wall of the soft tube two 511 and extends to the inside. The outer wall of the side of the plunger pump 601 away from the soft tube three 603 is provided with a soft tube four 604. The end of the soft tube four 604 away from the plunger pump 601 penetrates the outer wall of the feeding bin 204 and extends to the inside. The purpose of this arrangement is that the plunger pump 601 absorbs part of the cleaning liquid in the soft tube two 511 to the soft tube four 604 through the soft tube three 603, and then flows into the feeding bin 204 through the soft tube four 604, thereby cleaning the inside of the feeding bin 204. Example 3:

[0051] A method for preparing crystals in the production process of sodium stannate, using the sodium stannate crystallization device described in Example 2, sodium stannate solution is added to the reaction bin 1 from the feeding port 15, the heating mechanism is started to heat, and after the sodium stannate solution is concentrated to reach the saturation concentration, the alkaline substance (sodium hydroxide) is placed on the discharging table 206, and then sent to the outside of the screw post 203 through the screw rod 205. After the upper output end of the motor 13 is opened, the transmission belt 207 drives the worm 201 to rotate under the rotation of the motor 13, the gear teeth on the side wall of the worm 201 drive the worm gear 202 to rotate, and the screw post 203 starts to rotate under the drive of the worm gear 202. When the screw post 203 rotates, the threads on the outer wall of the screw post 203 can transport the objects on the object table to the feeding pipe 208, and then into the reaction bin 1 through the feeding pipe 208. The workers only need to place the reactants, and the work is simple and conducive to the improvement of efficiency. The transportation of the reactants by the screw post 203 can be micro-controlled through the motor 13, so it is not necessary to weigh, and only needs to rotate a specific number of times on the upper output end of the motor 13 to control the amount of reactants. After the reactants are placed, the lower output end of the motor 13 is opened, and the stirring fan 301 starts to rotate under the drive of the motor 13. Since the gear one 304 and the gear two 305 are engaged, and the gear two 305 is fixed on the bottom of the reaction bin 1, when the stirring fan 301 rotates with the gear one 304, the gear one 304 rotates by engaging with the gear two 305, thereby driving the stirring blades 303 on the rotating rod 302 to achieve the purpose of stirring. The stirring of the stirring blades 303 can make the various reactants fully react, thereby improving the yield and success rate of sodium stannate.

[0052] When the stirring fan 301 works, the eccentric wheel 401 also rotates, and the limiting frame 402 starts reciprocating under the extrusion of the eccentric wheel 401, so that the telescopic column 403 reciprocates, thereby extruding the air in the air cylinder 404. When the telescopic column 403 moves to the side close to the limiting frame 402, the air cylinder 404 is under negative pressure, and then starts to absorb the gas in the reaction bin 1. Conversely, the air cylinder 404 is under positive pressure, and due to the action of the one-way valve 407, the air inlet cylinder 406 cannot exhaust, and the air cylinder 404 extrudes the gas to the gas collecting barrel 405. Under the reciprocating movement of the limiting frame 402, the gas in the reaction bin 1 is gradually absorbed, thereby realizing the treatment of the reaction gas.

[0053] By controlling the telescopic switch 510, the electric telescopic rod 513 is retracted, the hose 1 509 and the hose 2 511 are communicated, the cleaning liquid in the liquid storage bin 508 flows into the water inlet ring 501, and then flows into the through hole at the top of the stirring fan 301 through the U-shaped hole 502 and the water delivery pipe 503, and then flows out through the one-way valve 2 507 on the scraper 506. Since the scraper 506 is tightly attached to the inner wall of the reaction bin 1 under the action of the telescopic cylinder 504, the cleaning liquid can flow out to the inner wall of the reaction bin 1 when the scraper 506 cleans the reaction bin 1, so that the cleaning of the reaction bin 1 by the scraper 506 is more thorough. When the electric telescopic rod 513 is retracted, the rubber strip 514 drives the rotation of the two rubber wheels 515, and after the rubber wheels 515 rotate, the top rod 516 rotates to the two sides of the telescopic switch 510. When the electric telescopic rod 513 is retracted, the top rod 516 is in a straight line, and when the limiting frame 402 reciprocates with the telescopic switch 510, the top rod 516 abuts against the swing frame 602, and the swing frame 602 reciprocates, thereby providing power for the plunger pump 601. Thus, the plunger pump 601 absorbs part of the cleaning liquid in the hose 2 511 to the hose 4 604 through the hose 3 603, and then the cleaning liquid flows into the feeding bin 204 through the hose 4 604, thereby achieving the effect of cleaning the inside of the feeding bin 204, further removing impurities in the reaction process, and improving the production efficiency of sodium stannate.

[0054] Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art and related fields without creative labor should belong to the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application, such as without special description and limitation, are implemented according to the conventional means in the art.

Claims

1. A method for preparing crystals in the production process of sodium stannate, wherein sodium stannate solution is added into a sodium stannate crystallization device, heated and concentrated to reach saturation concentration, and then an alkaline substance is added to make sodium stannate crystallize and precipitate, the sodium stannate crystallization device comprising a reaction bin (1) provided with a heating mechanism, a protective shell (11) fixedly connected to the top wall of the top of the reaction bin (1), a machine bin (12) fixedly connected to the top wall of the top of the protective shell (11), and a motor (13) fixedly connected to the bottom wall of the machine bin (12), wherein the motor comprises an upper output end and a lower output end, and the bottom side wall of the reaction bin (1) is provided with a discharge port (14), characterized in that, Also include: The discharging mechanism (2) includes a worm (201) installed on the bottom side wall of the bin (12), the outer wall of the worm (201) is engaged with a worm gear (202), the side wall of the worm gear (202) is fixedly connected with a stud (203) at the middle shaft, the outer wall of the stud (203) is sleeved with a feeding bin (204), the bottom outer wall of the feeding bin (204) is provided with a screw rod (205), the screw rod (205) penetrates the bottom outer wall of the feeding bin (204) and extends to the inside, the extension of the screw rod (205) is fixedly connected with a discharging table (206), the outer wall of the discharging table (206) is slidingly connected with the inner wall of the feeding bin (204); Wherein, the worm (201) is connected with the upper side output end of the motor (13) through the transmission belt (207); The stirring mechanism (3) includes a plurality of stirring fans (301) sleeved on the outer wall of the lower side output end of the motor (13), a plurality of stirring fans (301) are arranged in the reaction bin (1), the inner wall of each stirring fan (301) is rotatably connected with a rotating rod (302) at the middle shaft, the outer wall of the rotating rod (302) is fixedly connected with a plurality of stirring blades (303), one end of the rotating rod (302) away from the shell (11) penetrates the inner wall of the stirring fan (301) and extends to the outside, the outer wall of the extension of the rotating rod (302) is fixedly connected with a gear one (304), the middle shaft of the upper wall of the reaction bin (1) is fixedly connected with a gear two (305), the gear one (304) is engaged with the gear two (305). The discharging mechanism (2) further comprises an inlet pipe (208) penetrating the outer wall of the feeding bin (204), one end of the inlet pipe (208) penetrates the outer wall of the shell (11) and extends into the reaction bin (1).

2. A process for the preparation of crystals in the production of sodium stannate according to claim 1, characterized by: The inside of the shell (11) is provided with a gas collecting mechanism (4), the gas collecting mechanism (4) includes an eccentric wheel (401) fixedly connected to the outer wall of the lower side output end of the motor (13), the outer wall of the eccentric wheel (401) is provided with a limiting frame (402), the inner wall of the limiting frame (402) is slidingly connected with the outer wall of the eccentric wheel (401), the side wall of the limiting frame (402) is fixedly connected with a telescopic column (403) at the middle shaft, the outer wall of the telescopic column (403) is slidingly connected with a gas cylinder (404), one end of the gas cylinder (404) away from the limiting frame (402) penetrates the shell (11) and extends to the outside, the extension of the shell (11) is fixedly connected with a gas collecting barrel (405); The outer wall of one side of the gas cylinder (404) close to the gas collecting barrel (405) is provided with an air inlet cylinder (406), one end of the air inlet cylinder (406) away from the gas cylinder (404) penetrates the bottom of the shell (11) and extends to the lower wall of the top of the reaction bin (1), the extension of the air inlet cylinder (406) is provided with a plurality of through holes in the lower wall, the inner wall of each through hole is fixedly connected with a one-way valve one (407).

3. A process for the preparation of crystals in the production of sodium stannate according to claim 2, characterized by: The shell (11) is internally provided with a cleaning mechanism (5), the cleaning mechanism (5) comprises a water inlet ring (501) sleeved on the lower side output end outer wall of the motor (13), the outer wall of the motor (13) is provided with a U-shaped hole (502), the inside of the water inlet ring (501) is in communication with the U-shaped hole (502), one end of the U-shaped hole (502) away from the water inlet ring (501) is fixedly connected with a water delivery pipe (503), the top of the stirring fan (301) is provided with a through hole, one end of the water delivery pipe (503) away from the U-shaped hole (502) extends through the top upper wall of the stirring fan (301) to the through hole.

4. A process for the preparation of crystals in the production of sodium stannate according to claim 3, characterized by: The cleaning mechanism (5) further comprises an extension cylinder (504) sleeved on the outer wall of each stirring fan (301) respectively, the inside side wall of each extension cylinder (504) is fixedly connected with a spring (505) respectively, one end of each spring (505) close to the stirring fan (301) is fixedly connected to the outer wall of the stirring fan (301) respectively, the outer side wall of each extension cylinder (504) is fixedly connected with a scraper (506), the top side wall of the scraper (506) is provided with a through hole, the inside of the through hole is fixedly connected with a one-way valve two (507).

5. A process for the preparation of crystals in the production of sodium stannate according to claim 4, characterized by: The cleaning mechanism (5) further comprises a liquid storage bin (508) fixedly connected to the inner wall of the machine bin (12), the bottom of the liquid storage bin (508) is provided with a hose one (509) penetratingly, one end of the hose one (509) away from the liquid storage bin (508) penetrates through the shell (11) and extends to the inside, the extension part of the hose one (509) is fixedly connected with a telescopic switch (510), the side wall of the telescopic switch (510) is fixedly connected to the outer wall of the limiting frame (402), the bottom lower wall of the telescopic switch (510) is provided with a hose two (511) penetratingly, one end of the hose two (511) away from the telescopic switch (510) penetrates through the top upper wall of the reaction bin (1) and extends to the inside, the extension part of the hose two (511) penetrates through the outer wall of the water inlet ring (501).

6. A process for the preparation of crystals in the production of sodium stannate according to claim 5, characterized by: The telescopic switch (510) comprises an outer shell (512) fixedly connected to the side wall of the limiting frame (402), the inside of the outer shell (512) is fixedly connected with an electric telescopic rod (513), the upper wall of the electric telescopic rod (513) is fixedly connected with a rubber strip (514) at the middle shaft, the two side outer walls of the rubber strip (514) are slidably connected with rubber wheels (515) respectively, the upper wall of each rubber wheel (515) is fixedly connected with a top rod (516) respectively, each top rod (516) is rotatably connected to the top upper wall of the outer shell (512).

7. A process for the preparation of crystals in the production of sodium stannate according to claim 6, characterized by: The telescopic switch (510) is externally provided with a compression mechanism (6), the compression mechanism (6) comprises a plunger pump (601) fixedly connected to the top wall of the reaction bin (1), the outer wall of the plunger pump (601) is fixedly connected with a swing frame (602), one side of the outer wall of the plunger pump (601) is provided with a soft tube three (603) in a penetrating mode, one end of the soft tube three (603) away from the plunger pump (601) penetrates the outer wall of the soft tube two (511) and extends to the inside, the outer wall of the side of the plunger pump (601) away from the soft tube three (603) is provided with a soft tube four (604) in a penetrating mode, and one end of the soft tube four (604) away from the plunger pump (601) penetrates the outer wall of the feeding bin (204) and extends to the inside.

8. A process for the preparation of crystals in the production of sodium stannate according to any one of claims 1-7, characterized by: The sodium stannate solution is added into the reaction bin (1) of the sodium stannate crystallization device from the feeding port (15), is heated and concentrated to reach the saturated concentration, then the alkaline substance is added into the reaction bin (1) from the discharging table (206), the sodium stannate solution and the alkaline substance are mixed by stirring, and the sodium stannate crystallization is precipitated.

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