A sodium gluconate evaporation crystallization process

Abstract

This invention discloses a sodium gluconate evaporation crystallization process, comprising the following steps: A sodium gluconate solution is placed inside an evaporation crystallization apparatus; after placement, the sodium gluconate solution is heated to initiate evaporation crystallization; during heating, the sodium gluconate solution is stirred to ensure uniform heating and improve evaporation crystallization efficiency; when the sodium gluconate solution reaches the critical crystallization point, the heating temperature is maintained, and crystallization begins; at this point, the stirring speed is reduced; after crystallization, the crystallized sodium gluconate is removed from the evaporation crystallization apparatus. This invention prevents the gradual crystallization of sodium gluconate from increasing resistance in the stirring mechanism and affecting the stirring process.

Description

Technical Field

[0001] This invention relates to the field of sodium gluconate processing, and more particularly to a sodium gluconate evaporation crystallization process. Background Technology

[0002] Sodium gluconate has a wide range of industrial applications. It can be used as a highly efficient chelating agent in industries such as construction, textile printing and dyeing, metal surface treatment, and water treatment. It is also used as a steel surface cleaner, glass bottle cleaner, and aluminum oxide coloring agent in the electroplating industry. In the concrete industry, it is used as a highly efficient retarder and a highly efficient water-reducing agent. In the production of sodium gluconate, it is necessary to perform evaporation and crystallization treatment.

[0003] A search revealed Chinese patent application CN210583744U, which discloses a crystallization apparatus for producing sodium gluconate. The apparatus includes a housing with two conveying chambers inside, and a cooling chamber connected to each conveying chamber. This sodium gluconate crystallization apparatus uses an upper conveying pipe to deliver coolant to the upper conveying chambers. The coolant causes a rotating fan blade to rotate, which in turn drives a rotating shaft. During the shaft's rotation, a movable block causes a stirring fan blade to rotate. The stirring fan blade vibrates under the combined action of the movable block, baffle, connecting spring, and guide groove, preventing crystals from adhering to the surface of the stirring fan blade during crystallization. This apparatus utilizes the energy from the coolant entering the crystallization liquid through a series of mechanical structures to effectively stir the liquid, making crystallization easier without requiring additional power.

[0004] When crystallizing sodium gluconate, the sodium gluconate solution is usually stirred. As the sodium gluconate is heated, it gradually solidifies, which increases the resistance to the stirring mechanism and affects the stirring effect. Summary of the Invention

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A sodium gluconate evaporation crystallization process, the specific steps of which are as follows:

[0007] S1: Pour the sodium gluconate solution into the evaporation and crystallization apparatus;

[0008] S2: After the sodium gluconate solution is filled, it is heated to cause the sodium gluconate solution to begin evaporation and crystallization.

[0009] S3: During the heating of the sodium gluconate solution, the sodium gluconate solution is stirred to ensure uniform heating and improve the evaporation and crystallization efficiency of the sodium gluconate solution.

[0010] S4: When the sodium gluconate solution reaches the critical point of crystallization, continue to maintain the heating temperature of the sodium gluconate solution. The sodium gluconate solution will begin to crystallize. At this point, slow down the stirring speed of the sodium gluconate solution.

[0011] S5: After sodium gluconate crystallization is complete, remove the crystallized sodium gluconate from the inside of the evaporation crystallization device.

[0012] The evaporation crystallization apparatus includes a fixed base, a heating furnace, and a tank. The inner wall of the heating furnace is bolted to a heater. The fixed base is bolted to the heating furnace. A moving mechanism is provided on one side of the fixed base, and a fixed ring is fixedly connected to one side of the moving mechanism. The fixed ring is fixedly connected to the tank. A stirring mechanism is provided inside the tank, and a second swinging mechanism is provided on one side of the stirring mechanism.

[0013] Preferably, the moving mechanism includes a moving base, a first motor, and a threaded rod. The moving base and the fixed base are connected by bolts. A moving port is provided on one side of the moving base. The moving port and the threaded rod are rotatably connected by a bearing. A moving block is slidably connected to the inner wall of the moving port. A threaded hole is provided on the top of the moving block. The threaded rod is threadedly connected to the threaded hole. The first motor is fixedly connected to the top of the moving base. One end of the first motor is bolted to the threaded rod. A support frame is bolted to one side of the moving block. The support frame is bolted to the fixed ring. Positioning ports are provided at both ends of the outer wall of one side of the moving base. Positioning blocks are slidably connected to the inner wall of the positioning ports. The positioning blocks are fixedly connected to the support frame.

[0014] Preferably, the stirring mechanism includes a rotating shaft, multiple scrapers, a turntable, and multiple stirring shafts. The rotating shaft and the support frame are rotatably connected by bearings. A second motor is bolted to the top of the support frame. One end of the second motor is fixedly connected to the rotating shaft. The turntable and the bottom of the rotating shaft are bolted together. Multiple stirring shafts are fixedly arranged in a ring on the outer wall of the turntable at equal intervals. The bottom of the stirring shaft contacts the inner wall of the bottom of the tank. A connecting sleeve is fixedly fitted onto the outer wall of the rotating shaft. Multiple scrapers are fixedly arranged in a ring at equal intervals on the outer wall of the connecting sleeve. One end of the scraper contacts the side wall of the tank.

[0015] Preferably, the bottom of the stirring shaft is provided with a fixing groove, and the second swing mechanism is located between the fixing groove and the stirring shaft. The second swing mechanism includes a second swing plate and a second spring. The two ends of the second spring are respectively connected to the second swing plate and the stirring shaft by bolts. One end of the second swing plate is connected to the stirring shaft by a hinge. The top of the second swing plate is provided with multiple protrusions, and the size of the protrusions gradually decreases from the inside to the outside.

[0016] Preferably, both sides of the inner wall of the top of the fixing groove are connected to connecting blocks by bolts, and a rotating rod is rotatably connected between the two connecting blocks by bearings. The outer wall of the rotating rod is provided with a protrusion, which is U-shaped. A bushing is rotatably sleeved on the outer wall of the protrusion. A connecting shaft is connected to the bushing and the second swing plate by a hinge. The top of the fixing groove is provided with an opening, which is slidably connected to the connecting shaft. Multiple rotating blades are connected to one side of the outer wall of the rotating rod by bolts. Guide openings are provided inside the opposite sides of the fixing groove, and one end of the guide opening is inclined.

[0017] Preferably, a controller is bolted to one side of the heating furnace, and the controller is electrically connected to the heater.

[0018] Preferably, the top of the heating furnace is provided with a lifting mechanism, which includes a pull ring and a plurality of first springs. The top of the heating furnace is provided with a storage groove, the pull ring is slidably connected to the storage groove, and the two ends of the first spring are respectively connected to the pull ring and the storage groove by bolts.

[0019] Preferably, a filter opening is provided on one side of the scraper, and a first swing mechanism is provided on the inner wall of the filter opening.

[0020] Preferably, the first swing mechanism includes two first swing plates and a push plate, and the two first swing plates are connected to the top inner wall of the filter port by hinges. The two sides of the top of the push plate are connected to the two first swing plates by hinges, and the two push rods are distributed in a V-shape.

[0021] Preferably, the inner walls of the opposite sides of the filter outlet are rotatably connected to a rotating roller via bearings, and the outer walls of the rotating rollers are connected to blades via bolts on both sides. The outer walls of the rotating rollers are connected to a connecting plate via bolts, the connecting plate is located between the two blades, the top of the connecting plate is connected to a second magnet via bolts, and the bottom of the push plate is connected to a first magnet via bolts. The first magnet and the second magnet repel each other.

[0022] The beneficial effects of this invention are as follows:

[0023] This invention utilizes a stirring mechanism and a second oscillating mechanism. When sodium gluconate is stirred, the sodium gluconate solution is conveyed into the fixed tank through a guide port. Because one end of the guide port is inclined, the sodium gluconate solution impacts one side of the rotating blade under the influence of the guide port. This causes the rotating blade to drive the rotating rod to rotate, and the protrusion rotates along with the rotating rod. Since the protrusion is U-shaped, the connecting shaft, under the action of the protrusion and the bushing, drives the second oscillating plate to oscillate up and down. This oscillation of the second oscillating plate improves the stirring effect of the stirring mechanism on the sodium gluconate solution, preventing the sodium gluconate from gradually crystallizing during heating, which would increase the resistance to the stirring mechanism and affect the stirring of the sodium gluconate. Because the size of the protrusion gradually decreases from the inside to the outside, the amplitude generated by the second oscillating plate when oscillating the sodium gluconate gradually decreases from the inside to the outside, facilitating layered stirring of the sodium gluconate and further improving the stirring effect of the stirring mechanism on the sodium gluconate.

[0024] This invention utilizes a scraper and a first oscillating mechanism. When the scraper scrapes the side wall of the tank, the blades drive the rotating roller to rotate under the action of sodium gluconate, thereby gradually reducing the distance between the first magnet and the second magnet. Since the first magnet and the second magnet repel each other, as the distance between them decreases, the first magnet will drive the push plate to move upward under the action of the repulsive force. As the push plate moves, it pushes the two push rods to spread out to both sides. At this time, the first oscillating plate will oscillate back and forth under the action of the push rods, so as to improve the stirring effect of the stirring mechanism on sodium gluconate. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the process structure of a sodium gluconate evaporation crystallization process proposed in this invention;

[0026] Figure 2 This is a schematic diagram of the evaporation crystallization device for a sodium gluconate evaporation crystallization process proposed in this invention;

[0027] Figure 3 This is a cross-sectional structural schematic diagram of a sodium gluconate evaporation crystallization process proposed in this invention;

[0028] Figure 4 This is a schematic diagram of the lifting mechanism structure for a sodium gluconate evaporation crystallization process proposed in this invention.

[0029] Figure 5 This is a schematic diagram of the moving mechanism structure for a sodium gluconate evaporation crystallization process proposed in this invention.

[0030] Figure 6 This is a schematic diagram of the stirring mechanism structure for a sodium gluconate evaporation crystallization process proposed in this invention.

[0031] Figure 7 This is a schematic diagram of the rotating disk structure for a sodium gluconate evaporation crystallization process proposed in this invention;

[0032] Figure 8 This is a schematic cross-sectional view of the stirring shaft in a sodium gluconate evaporation crystallization process proposed in this invention.

[0033] Figure 9 This is a schematic diagram of the second oscillating mechanism in a sodium gluconate evaporation crystallization process proposed in this invention.

[0034] Figure 10 This is a schematic diagram of the scraper structure for a sodium gluconate evaporation crystallization process proposed in this invention.

[0035] Figure 11 This is a schematic diagram of the first oscillating mechanism in the sodium gluconate evaporation crystallization process proposed in this invention.

[0036] In the attached diagram: 1-Fixed base; 2-Heating furnace; 3-Moving base; 4-Support frame; 5-First motor; 6-Second motor; 7-Stirring mechanism; 8-Tank body; 9-Fixing ring; 10-Lifting mechanism; 11-Controller; 12-Moving port; 13-Threaded rod; 14-Moving block; 15-Heater; 16-Receiving slot; 17-First spring; 18-Pull-out ring; 19-Positioning port; 20-Positioning block; 21-Scraper; 22-First swing mechanism; 23-Turntable; 24-Stirring shaft; 25-Second oscillating mechanism; 26-Fixed groove; 27-Passage; 28-Second oscillating plate; 29-Second spring; 30-Protrusion; 31-Connecting block; 32-Rotating blade; 33-Rotating rod; 34-Protrusion; 35-Shaft sleeve; 36-Connecting shaft; 37-Connecting sleeve; 38-Filter port; 39-First oscillating plate; 40-Push rod; 41-Push plate; 42-First magnet; 43-Rotating roller; 44-Blade; 45-Connecting plate; 46-Second magnet. Detailed Implementation

[0037] Example

[0038] Reference Figure 1-10 A sodium gluconate evaporation crystallization process, the specific steps of which are as follows:

[0039] S1: Pour the sodium gluconate solution into the evaporation and crystallization apparatus;

[0040] S2: After the sodium gluconate solution is filled, it is heated to cause the sodium gluconate solution to begin evaporation and crystallization.

[0041] S3: During the heating of the sodium gluconate solution, the sodium gluconate solution is stirred to ensure uniform heating and improve the evaporation and crystallization efficiency of the sodium gluconate solution.

[0042] S4: When the sodium gluconate solution reaches the critical point of crystallization, continue to maintain the heating temperature of the sodium gluconate solution. The sodium gluconate solution will begin to crystallize. At this point, slow down the stirring speed of the sodium gluconate solution.

[0043] S5: After sodium gluconate crystallization is complete, remove the crystallized sodium gluconate from the inside of the evaporation crystallization device.

[0044] The evaporation crystallization apparatus includes a fixed base 1, a heating furnace 2, and a tank 8. The inner wall of the heating furnace 2 is bolted to a heater 15. The fixed base 1 is bolted to the heating furnace 2. A moving mechanism is provided on one side of the fixed base 1, and a fixing ring 9 is fixedly connected to one side of the moving mechanism 2. The fixing ring 9 is fixedly connected to the tank 8. A stirring mechanism 7 is provided inside the tank 8, and a second swing mechanism 25 is provided on one side of the stirring mechanism 7. This can improve the stirring effect of the stirring mechanism 7 on the sodium gluconate solution and prevent the sodium gluconate from gradually crystallizing when heated, which would increase the resistance of the stirring mechanism and affect the stirring of the sodium gluconate.

[0045] Based on the above, the moving mechanism 2 includes a moving base 3, a first motor 5, and a threaded rod 13. The moving base 3 is bolted to the fixed base 1. A moving port 12 is provided on one side of the moving base 3. The moving port 12 and the threaded rod 13 are rotatably connected by a bearing. A moving block 14 is slidably connected to the inner wall of the moving port 12. A threaded hole is provided on the top of the moving block 14. The threaded rod 13 is threadedly connected to the threaded hole. The first motor 5 is fixedly connected to the top of the moving base 3. One end of the first motor 5 is bolted to the threaded rod 13. One side of the moving block 14 is open to the threaded rod 13. A support frame 4 is bolted to the fixed ring 9. The support frame 4 is bolted to the fixed ring 9. Positioning ports 19 are provided at both ends of the outer wall of one side of the movable seat 3. Positioning blocks 20 are slidably connected to the inner wall of the positioning ports 19. The positioning blocks 20 are fixedly connected to the support frame 4. When the sodium gluconate is evaporated and crystallized, the first motor 5 is started. The first motor 5 drives the threaded rod 13 to rotate, thereby causing the threaded rod 13 to drive the tank 8 to adjust up and down, so that the bottom of the tank 8 can be attached to the heating furnace 2, so as to heat the sodium gluconate inside the tank 8.

[0046] Based on the above, the stirring mechanism 7 includes a rotating shaft, multiple scrapers 21, a turntable 23, and multiple stirring shafts 24. The rotating shaft and the support frame 4 are rotatably connected by bearings. The top of the support frame 4 is bolted to a second motor 6, one end of which is fixedly connected to the rotating shaft. The turntable 23 is bolted to the bottom of the rotating shaft. Multiple stirring shafts 24 are fixedly arranged in a ring on the outer wall of the turntable 23 at equal intervals. The bottom of the stirring shafts 24 contacts the bottom inner wall of the tank 8. A connecting sleeve 37 is fixedly fitted onto the outer wall of the rotating shaft. Multiple scrapers 21 are fixedly arranged in a ring on the outer wall of the connecting sleeve 37 at equal intervals. One end of the scraper 21 contacts the side wall of the tank 8. While stirring the sodium gluconate, the mechanism can scrape off the solidified sodium gluconate adhering to the bottom inner wall and side wall of the tank 8, preventing the sodium gluconate from adhering to the inner wall of the tank 8 during crystallization, thus affecting the discharge of sodium gluconate crystals.

[0047] Based on the above, a fixing groove 26 is provided at the bottom of the stirring shaft 24, and the second swing mechanism 25 is located between the fixing groove 26 and the stirring shaft 24. The second swing mechanism 25 includes a second swing plate 28 and a second spring 29. The two ends of the second spring 29 are respectively connected to the second swing plate 28 and the stirring shaft 24 by bolts. One end of the second swing plate 28 is connected to the stirring shaft 24 by a hinge. The top of the second swing plate 28 is provided with a plurality of protrusions 30, and the size of the protrusions 30 gradually decreases from the inside to the outside.

[0048] Based on the above, both sides of the inner wall of the top of the fixed groove 26 are bolted to connecting blocks 31, and a rotating rod 33 is rotatably connected between the two connecting blocks 31 via a bearing. The outer wall of the rotating rod 33 is provided with a protrusion 34, which is U-shaped. A bushing 35 is rotatably sleeved on the outer wall of the protrusion 34. The bushing 35 is hinged to the second swing plate 28 via a connecting shaft 36. The top of the fixed groove 26 has an opening 27, which is slidably connected to the connecting shaft 36. Multiple rotating blades 32 are bolted to one side of the outer wall of the rotating rod 33. Guide ports are provided on the opposite sides of the fixed groove 26. One end of the guide port is inclined. When sodium gluconate is stirred, the sodium gluconate solution is transported into the interior of the fixed groove 26 through the guide port. Because one end of the guide port is inclined, the sodium gluconate solution will impact the rotating blades under the action of the guide port. On one side of 32, the rotating blade 32 will drive the rotating rod 33 to rotate, and the protrusion 34 will rotate with the rotating rod 33. Since the protrusion 34 is U-shaped, the connecting shaft 36 will drive the second swing plate 28 to swing up and down under the action of the protrusion 34 and the bushing 35. The reciprocating swing of the second swing plate 28 can improve the stirring effect of the stirring mechanism 7 on the sodium gluconate solution, and prevent the sodium gluconate from gradually crystallizing when heated, which would increase the resistance of the stirring mechanism and affect the stirring of sodium gluconate. Since the size of the protrusion 30 gradually decreases from the inside to the outside, the amplitude generated by the second swing plate 28 when swinging the sodium gluconate will gradually decrease from the inside to the outside, which facilitates the layered stirring of sodium gluconate, so as to further improve the stirring effect of the stirring mechanism 7 on sodium gluconate.

[0049] Based on the above, a controller 11 is bolted to one side of the heating furnace 2, and the controller 11 is electrically connected to the heater 15.

[0050] Based on the above, a lifting mechanism 10 is provided on the top of the heating furnace 2, and the lifting mechanism 10 includes a pull ring 18 and a plurality of first springs 17. A storage groove 16 is provided on the top of the heating furnace 2. The pull ring 18 is slidably connected to the storage groove 16. The two ends of the first springs 17 are respectively connected to the pull ring 18 and the storage groove 16 by bolts. Example

[0051] Reference Figure 1-11 A sodium gluconate evaporation crystallization process, compared with Example 1, has a filter port 38 on one side of the scraper 21, and a first swing mechanism 22 is provided on the inner wall of the filter port 38.

[0052] Based on the above, the first swing mechanism 22 includes two first swing plates 39 and a push plate 41. The two first swing plates 39 are connected to the top inner wall of the filter port 38 by hinges. The two sides of the top of the push plate 41 are connected to the two first swing plates 39 by hinges, and the two push rods 40 are distributed in a V-shape.

[0053] Based on the above, the inner walls of the opposite sides of the filter port 38 are rotatably connected to rollers 43 via bearings, and the outer walls of the rollers 43 are bolted to both sides with blades 44. The outer walls of the rollers 43 are bolted to a connecting plate 45, which is located between the two blades 44. The top of the connecting plate 45 is bolted to a second magnet 46, and the bottom of the push plate 41 is bolted to a first magnet 42. The first magnet 42 and the second magnet 46 repel each other. When the scraper 21 scrapes the side wall of the tank 8, the blades 44 will be affected by the sodium gluconate. The rotating roller 43 is driven to rotate, thereby gradually reducing the distance between the first magnet 42 and the second magnet 46. Since the first magnet 42 and the second magnet 46 repel each other, as the distance between the first magnet 42 and the second magnet 46 decreases, the first magnet 42 will drive the push plate 41 to move upward under the action of the repulsive force. When the push plate 41 moves, it will push the two push rods 40 to spread to both sides. At this time, the first swing plate 39 will swing back and forth under the action of the push rod 41, so as to improve the stirring effect of the stirring mechanism 7 on sodium gluconate.

[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A sodium gluconate evaporation crystallization process, the specific steps are: S1: the sodium gluconate solution is filled into the inside of the evaporation crystallization device; S2: after filling, the sodium gluconate solution is heated to start evaporation crystallization; S3: during heating, the sodium gluconate solution is stirred to make the sodium gluconate solution evenly heated and improve the evaporation crystallization efficiency of the sodium gluconate solution; S4: when the sodium gluconate solution reaches the critical point of crystallization, the heating temperature of the sodium gluconate solution is maintained, the sodium gluconate solution starts to crystallize, and the stirring speed of the sodium gluconate solution is reduced; S5: after the sodium gluconate crystallization is completed, the crystallized sodium gluconate is taken out from the inside of the evaporation crystallization device. The evaporation crystallization device includes a fixing base (1), a heating furnace (2) and a tank body (8), the inner wall of the heating furnace (2) is provided with a heater (15) through bolt connection, the fixing base (1) and the heating furnace (2) are connected through bolt connection, one side of the fixing base (1) is provided with a moving mechanism, one side of the heating furnace (2) is fixedly connected with a fixing ring (9), the fixing ring (9) is fixedly connected with the tank body (8), the inside of the tank body (8) is provided with a stirring mechanism (7), one side of the stirring mechanism (7) is provided with a second swing mechanism (25), the moving mechanism includes a moving base (3), a first motor (5) and a threaded rod (13), the moving base (3) and the fixing base (1) are connected through bolt connection, one side of the moving base (3) is provided with a moving opening (12), the moving opening (12) and the threaded rod (13) are connected through bearing rotation, the inner wall of the moving opening (12) is slidably connected with a moving block (14), the top of the moving block (14) is provided with a threaded hole, the threaded rod (13) is screwed with the threaded hole, the first motor (5) is fixedly connected with the top of the moving base (3), one end of the first motor (5) is connected with the threaded rod (13) through bolt connection, one side of the moving block (14) is connected with a support frame (4) through bolt connection, the support frame (4) is connected with the fixing ring (9) through bolt connection, the outer wall of one side of the moving base (3) is provided with a positioning opening (19) at both ends, the inner wall of the positioning opening (19) is slidably connected with a positioning block (20), the positioning block (20) is fixedly connected with the support frame (4), the stirring mechanism (7) includes a rotating shaft, a plurality of scrapers (21), a rotating disc (23) and a plurality of stirring shafts (24), the rotating shaft and the support frame (4) are connected through bearing rotation, the top of the support frame (4) is connected with a second motor (6) through bolt connection, one end of the second motor (6) is fixedly connected with the rotating shaft, the rotating disc (23) is connected with the bottom of the rotating shaft through bolt connection, the plurality of stirring shafts (24) are fixedly arranged on the outer wall of the rotating disc (23) at equal intervals, the bottom of the stirring shaft (24) is in contact with the inner wall of the bottom of the tank body (8), the outer wall of the rotating shaft is fixedly sleeved with a connecting sleeve (37), the plurality of scrapers (21) are fixedly arranged on the outer wall of the connecting sleeve (37) at equal intervals, one end of the scraper (21) is in contact with the side wall of the tank body (8), the bottom of the stirring shaft (24) is provided with a fixing groove (26), the second swing mechanism (25) is located between the fixing groove (26) and the stirring shaft (24), the second swing mechanism (25) includes a second swing plate (28) and a second spring (29), the two ends of the second spring (29) are connected with the second swing plate (28) and the stirring shaft (24) through bolt connection, one end of the second swing plate (28) is connected with the stirring shaft (24) through a hinge, the top of the second swing plate (28) is provided with a plurality of protrusions (30), the size of the protrusion (30) gradually decreases from inside to outside, the two sides of the top inner wall of the fixing groove (26) are connected with a connecting block (31) through bolt connection,And two connecting blocks (31) are rotatably connected by bearings between the outer wall of the rotating rod (33) provided with a protruding part (34), the shape of the protruding part (34) is U-shaped, the outer wall of the protruding part (34) is rotatably sleeved with a shaft sleeve (35), the shaft sleeve (35) is hingedly connected with a connecting shaft (36) between the second swing plate (28), the top of the fixed groove (26) is provided with a through port (27), the through port (27) is slidably connected with the connecting shaft (36), a plurality of rotating leaves (32) are connected on one side of the outer wall of the rotating rod (33) through bolts, the inner sides of the opposite sides of the fixed groove (26) are both provided with a guide port, one end of the guide port is inclined.

2. The process for sodium gluconate evaporation crystallization according to claim 1, characterized in that, One side of the heating furnace (2) is connected with a controller (11) through bolts, and the controller (11) and the heater (15) are electrically connected.

3. The process for sodium gluconate evaporation crystallization according to claim 1, characterized in that, The top of the heating furnace (2) is provided with a lifting mechanism (10), and the lifting mechanism (10) includes a pull ring (18) and a plurality of first springs (17). The top of the heating furnace (2) is provided with a receiving groove (16), the pull ring (18) is slidably connected with the receiving groove (16), and the two ends of the first spring (17) are connected with the pull ring (18) and the receiving groove (16) through bolts.

4. The process for sodium gluconate evaporation crystallization according to claim 1, characterized in that, The side of the scraper (21) is provided with a filter opening (38), and the inner wall of the filter opening (38) is provided with a first swing mechanism (22).

5. The process for sodium gluconate evaporation crystallization according to claim 4, characterized by, The first swing mechanism (22) includes two first swing plates (39) and a push plate (41), the two first swing plates (39) are connected with the top inner wall of the filter opening (38) through hinges, the push plate (41) is connected with the two first swing plates (39) through hinges on both sides of the top, and the two push rods (40) are distributed in the shape of a Chinese character.

6. The process for sodium gluconate evaporation crystallization according to claim 5, characterized by that, The inner walls of the opposite sides of the filter opening (38) are rotatably connected with rotating rollers (43) through bearings, the outer walls of the rotating rollers (43) are connected with blades (44) through bolts on both sides, the outer wall of the rotating roller (43) is connected with a connecting plate (45) through bolts, the connecting plate (45) is located between the two blades (44), the top of the connecting plate (45) is connected with a second magnet (46) through bolts, the bottom of the push plate (41) is connected with a first magnet (42) through bolts, and the first magnet (42) and the second magnet (46) repel each other.

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