Improved recrystallization device

Abstract

The utility model relates to the technical field of sulfamic acid production, and discloses an improved recrystallization device which comprises a recrystallization tank, a cooling pipe is wound outside the recrystallization tank, a circulating mechanism is arranged on the right side of the recrystallization tank, the upper end of the recrystallization tank is fixedly connected with a tank cover, the upper surface of the tank cover is fixedly connected with a motor, and the motor is fixedly connected with the recrystallization tank. The output end of the motor is fixedly connected with a stirring rod; a scraping mechanism is arranged at the upper end of the outer part of the stirring rod; liquid in mixed liquid is pumped into the recrystallization tank again through the circulating mechanism for repeated crystallization, the crystallization efficiency is improved, a motor in the scraping mechanism drives a stirring rod to rotate, so that the inner wall of the recrystallization tank is cleaned by a scraping plate, and the recrystallization effect is improved. The situation that crystals separated out from the sulfamic acid mixed liquid are adhered to the inner wall and cannot be discharged smoothly is avoided; the pressure sensor detects the pressure applied to the inner wall of the recrystallization tank by the scraping plate, and the pressure applied to the inner wall of the recrystallization tank by the scraping plate is always within a set range in cooperation with the telescopic cylinder.

Description

TECHNICAL FIELD

[0001] The utility model relates to amino sulfonic acid production technical field, specifically is an improved type recrystallization device. BACKGROUND

[0002] The production process of amino sulfonic acid needs to be recrystallized, that is, after dissolving amino sulfonic acid crystals in a solvent or melting, it is recrystallized from the solution or melt again; Recrystallization can purify impure substances or separate salts mixed together from each other;

[0003] The existing crystallization kettle will have residual crystals on the side wall of the kettle body during the crystallization process, resulting in unsmooth crystallization output. In addition, the existing crystallization kettle also has the problem of incomplete crystallization caused by low heat exchange efficiency, and the direct discharge of the solution will cause waste of products.

[0004] Chinese patent discloses a solidification crystallization device for producing amino sulfonic acid by recrystallization method (authorized publication number CN217511207U), which can effectively solve the problem of crystallization on the inner wall of the kettle body by scraping the crystallization on the inner wall of the kettle body with the scraper. The liquid in the solid material containing the liquid is filtered through the filter box, and the liquid part is re-cooled and crystallized to improve the crystallization rate and avoid waste of raw materials;

[0005] However, it has certain disadvantages: the scraper will be worn out during long-term use, so it cannot contact the inner wall of the kettle body, and thus cannot effectively scrape the crystals on the inner wall of the kettle body. Utility model content

[0006] The utility model aims at providing an improved recrystallization device to solve the problems raised in the background art.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] An improved recrystallization device, comprising a recrystallization tank, a cooling pipe is wound outside the recrystallization tank, and a valve is fixedly connected to the lower surface of the recrystallization tank, the lower end of the valve is fixedly connected to a sieve box, a sieve plate is fixedly connected inside the sieve box, a circulating mechanism is arranged on the right side of the recrystallization tank, and a tank cover is fixedly connected to the upper end of the recrystallization tank, an electric motor is fixedly connected to the upper surface of the tank cover, and a stirring rod is fixedly connected to the output end of the electric motor.

[0009] A scraping mechanism is arranged at the outer upper end position of the stirring rod, the scraping mechanism comprises a supporting plate, a supporting block is fixedly connected to the upper surface of the supporting plate, a telescopic cylinder is fixedly connected to the rear surface of the supporting block, and a scraping piece is arranged at the telescopic end of the telescopic cylinder.

[0010] As a further scheme of the utility model: the circulating mechanism includes a water pump, the water inlet end of the water pump is fixedly connected with a first water pipe, and the water outlet end of the water pump is fixedly connected with a second water pipe.

[0011] As a further scheme of the utility model: the scraping member includes a support seat, a first sliding block is slidably connected in the inside of the support seat, a second sliding block is slidably connected in the rear of the first sliding block in the inside of the support seat, a plurality of springs are fixedly connected between the first sliding block and the second sliding block, a pressure sensor is fixedly connected to the front surface of the first sliding block, a supporting rod is fixedly connected to the detection end of the pressure sensor, and a scraper is fixedly connected to the front end of the supporting rod.

[0012] As a further scheme of the utility model: the stirring rod is located in the inside of the recrystallization tank, and the rear end of the support plate is fixedly connected to the outside of the stirring rod.

[0013] As a further scheme of the utility model: one end of the first water pipe penetrates through and is connected to the right side surface of the sieve box, the connection part between the first water pipe and the sieve box is located below the sieve plate, and one end of the second water pipe penetrates through and is connected to the upper surface of the tank cover.

[0014] As a further scheme of the utility model: the lower end of the support seat is fixedly connected to the upper surface of the support plate, the telescopic end of the telescopic cylinder movably penetrates through the rear surface of the support seat, the telescopic end of the telescopic cylinder is fixedly connected to the second sliding block, the supporting rod movably penetrates through the front surface of the support seat, and the scraper is attached to the inner surface of the recrystallization tank.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] 1. The utility model improves the crystallization efficiency by circulating mechanism.

[0017] 2. The utility model sets up the scraping mechanism, the motor in the scraping mechanism drives the stirring rod to rotate, the scraper cleans the inner wall of the recrystallization tank, avoids the crystallization in the sulfamic acid mixture from adhering to the inner wall and being discharged smoothly, the pressure sensor detects the pressure applied by the scraper to the inner wall of the recrystallization tank, cooperates with the telescopic cylinder, and makes the pressure of the scraper to the inner wall of the recrystallization tank always be in the set range. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is a structural schematic view of an improved recrystallization device;

[0019] Fig. 2 It is a sectional view of a recrystallization tank in an improved recrystallization device;

[0020] Fig. 3It is a structure diagram of an improved stirring rod in a recrystallization device;

[0021] Fig. 4 It is a structure diagram of an improved scraping mechanism in a recrystallization device;

[0022] Fig. 5 It is a structure diagram of an improved scraping piece in a recrystallization device;

[0023] Fig. 6 It is a sectional view of a support seat in an improved recrystallization device.

[0024] In the figure: 1, recrystallization tank; 2, cooling pipe; 3, valve; 4, sieve box; 5, sieve plate; 6, circulating mechanism; 7, water pump; 8, first water pipe; 9, second water pipe; 10, tank cover; 11, motor; 12, stirring rod; 13, scraping mechanism; 14, support plate; 15, support block; 16, telescopic cylinder; 17, scraping piece; 18, support seat; 19, first sliding block; 20, second sliding block; 21, spring; 22, pressure sensor; 23, support rod; 24, scraper. DETAILED DESCRIPTION

[0025] Please refer to Figs. 1-3 In the embodiment of the utility model, an improved recrystallization device includes recrystallization tank 1, the outside of recrystallization tank 1 is wound with cooling pipe 2, and the lower surface of recrystallization tank 1 is fixedly connected with valve 3, the lower end of valve 3 is fixedly connected with sieve box 4, the inside of sieve box 4 is fixedly connected with sieve plate 5, the right side of recrystallization tank 1 is provided with circulating mechanism 6, circulating mechanism 6 includes water pump 7, the water inlet end of water pump 7 is fixedly connected with first water pipe 8, one end of first water pipe 8 penetrates through and is connected to the right side surface of sieve box 4, and the connection between first water pipe 8 and sieve box 4 is located below sieve plate 5, the water outlet end of water pump 7 is fixedly connected with second water pipe 9, the upper end of recrystallization tank 1 is fixedly connected with tank cover 10, one end of second water pipe 9 penetrates through and is connected to the upper surface of tank cover 10, the upper surface of tank cover 10 is fixedly connected with motor 11, the output end of motor 11 is fixedly connected with stirring rod 12, and stirring rod 12 is located in the inside of recrystallization tank 1;

[0026] Amino sulfonic acid (i.e. amino sulfonic acid mixed solution) after being dissolved in solvent after being heated is placed in recrystallization tank 1;

[0027] Cooling medium is input in one end of cooling pipe 2, and cooling medium is output in the other end, which is used for carrying out cooling treatment on the amino sulfonic acid mixed solution, so that the mixed solution is cooled and crystallized, and the cooling medium can be cooling liquid, which can be cold water or ice water;

[0028] Valve 3 is preferably an electric valve;

[0029] Sieve box 4 includes box body and box cover, and valve 3 and the box cover are fixedly connected through bolts;

[0030] The sieve plate 5 is used for screening the crystallization and liquid in the sulfamic acid mixture;

[0031] The water pump 7 is used for pumping the screened liquid into the recrystallization tank 1 for crystallization treatment again;

[0032] The upper surface of the tank cover 10 is connected with the feed pipe on the left side of the motor 11, which can be used for putting the sulfamic acid mixture;

[0033] The stirring rod 12 includes a rod body and a plurality of stirring blades, which is used for stirring the sulfamic acid mixture to make it uniformly cooled.

[0034] In Figs. 2-6 , the outer upper end of the stirring rod 12 is provided with a scraping mechanism 13, the scraping mechanism 13 includes a support plate 14, the rear end of the support plate 14 is fixedly connected to the outer part of the stirring rod 12, the upper surface of the support plate 14 is fixedly connected with a support block 15, the rear surface of the support block 15 is fixedly connected with a telescopic cylinder 16, the telescopic end of the telescopic cylinder 16 is provided with a scraping piece 17, the scraping piece 17 includes a support seat 18, the lower end of the support seat 18 is fixedly connected to the upper surface of the support plate 14, the telescopic end of the telescopic cylinder 16 is movably connected through the rear surface of the support seat 18, the first sliding block 19 is slidably connected in the interior of the support seat 18, and the second sliding block 20 is slidably connected in the rear of the first sliding block 19 in the interior of the support seat 18, the telescopic end of the telescopic cylinder 16 is fixedly connected to the second sliding block 20, a plurality of springs 21 are fixedly connected between the first sliding block 19 and the second sliding block 20, the front surface of the first sliding block 19 is fixedly connected with a pressure sensor 22, the detection end of the pressure sensor 22 is fixedly connected with a support rod 23, the support rod 23 movably penetrates through the front surface of the support seat 18, the front end of the support rod 23 is fixedly connected with a scraper 24, and the scraper 24 is attached to the inner surface of the recrystallization tank 1;

[0035] The scraper 24 is used for scraping the crystallization adhered to the inner wall of the recrystallization tank 1;

[0036] The pressure sensor 22 is used for detecting the pressure applied by the support rod 23, the greater the pressure, the greater the pressure between the scraper 24 and the inner wall of the recrystallization tank 1, and vice versa, the smaller the pressure between the scraper 24 and the inner wall of the recrystallization tank 1;

[0037] The telescopic cylinder 16 is preferably an electric cylinder;

[0038] The telescopic cylinder 16 and the pressure sensor 22 are electrically connected with the external control system, so as to realize automatic operation, so that the pressure between the scraper 24 and the recrystallization tank 1 always remains within the set range.

[0039] The working principle of the utility model is: firstly, the staff pours the sulfamic acid dissolved in the solvent into the inside of the recrystallization tank 1 through the feed pipe, and the motor 11 drives the stirring rod 12 to rotate to stir the mixed solution; at the same time, the cooling liquid flows in the cooling pipe 2, and the mixed solution is cooled by the cooling liquid, so that the mixed solution precipitates the crystal; after a period of time, the valve 3 is opened, the mixed solution is screened through the sieve plate 5, the crystal is left on the surface of the sieve plate 5, and the water pump 7 pumps the liquid into the recrystallization tank 1, so that the cycle is carried out. The crystal is scraped off; when the scraper 24 is worn, it cannot tightly adhere to the inner wall of the recrystallization tank 1, at this time, the pressure sensor 22 detects that the pressure is lower than the set range, the telescopic cylinder 16 extends to push the second sliding block 20, so that the first sliding block 19 is extruded to press the pressure sensor 22, and the pressure of the scraper 24 on the recrystallization tank 1 is increased to the set range.

[0040] The above is only the preferred embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

[0041] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through the intermediate medium, can be the communication inside two elements. For ordinary skilled person in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

Claims

1. An improved recrystallization device, comprising a recrystallization tank (1), the outside of the recrystallization tank (1) is wound with a cooling pipe (2), and the lower surface of the recrystallization tank (1) is fixedly connected to a valve (3), the lower end of the valve (3) is fixedly connected to a screen box (4), the interior of the screen box (4) is fixedly connected to a screen plate (5), a circulation mechanism (6) is provided on the right side of the recrystallization tank (1), and the upper end of the recrystallization tank (1) is fixedly connected to a tank cover (10), the upper surface of the tank cover (10) is fixedly connected to a motor (11), and the output end of the motor (11) is fixedly connected to a stirring rod (12); It is characterized by: A scraping mechanism (13) is provided at the outer upper end of the stirring rod (12), and the scraping mechanism (13) comprises a support plate (14), the upper surface of the support plate (14) is fixedly connected to a support block (15), the rear surface of the support block (15) is fixedly connected to a telescopic cylinder (16), and the telescopic end of the telescopic cylinder (16) is provided with a scraping member (17).

2. An improved recrystallization device according to claim 1, characterized in that, The circulation mechanism (6) comprises a water pump (7), the water inlet end of the water pump (7) is fixedly connected to a first water pipe (8), and the water outlet end of the water pump (7) is fixedly connected to a second water pipe (9).

3. An improved recrystallization device according to claim 1, characterized in that, The scraper (17) includes a support seat (18), the interior of the support seat (18) is slidably connected to a first slider (19), and the interior of the support seat (18) is slidably connected to a second slider (20) located behind the first slider (19), a plurality of springs (21) are fixedly connected between the first slider (19) and the second slider (20), a pressure sensor (22) is fixedly connected to the front surface of the first slider (19), a detection end of the pressure sensor (22) is fixedly connected to a support rod (23), and a front end of the support rod (23) is fixedly connected to a scraper (24).

4. An improved recrystallization device according to claim 1, characterized in that, The stirring rod (12) is located inside the recrystallization tank (1), and the rear end of the support plate (14) is fixedly connected to the outside of the stirring rod (12).

5. An improved recrystallization device according to claim 2, characterized in that, One end of the first water pipe (8) is connected to the right side surface of the screen box (4), and the connection between the first water pipe (8) and the screen box (4) is located below the screen plate (5). One end of the second water pipe (9) is connected to the upper surface of the tank cover (10).

6. An improved recrystallization device according to claim 3, characterized in that: The lower end of the support seat (18) is fixedly connected to the upper surface of the support plate (14), the telescopic end of the telescopic cylinder (16) is movable and passes through the rear surface of the support seat (18), and the telescopic end of the telescopic cylinder (16) is fixedly connected to the second slider (20), the support rod (23) is movable and passes through the front surface of the support seat (18), and the scraper (24) is attached to the inner surface of the recrystallization tank (1).

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