Recrystallization device for sodium acetate production

Abstract

The utility model relates to a recrystallization device for sodium acetate production, and effectively solves the problems that an existing recrystallization device for sodium acetate production has some defects in practical application, on one hand, in the treatment process after raw materials are mixed, an effective filtering means is lacked, and the operation is inconvenient. The problems that insoluble impurities in raw materials are difficult to fully filter out, and if the impurities enter a subsequent crystallization link, an existing device generally does not have a perfect reflux utilization mechanism for residual raw materials after crystallization, and the residual raw materials are often directly discharged or treated, so that resource waste is caused are solved. According to the recrystallization device for sodium acetate production, through cooperative arrangement of a first drainage pipe and a second drainage pipe, raw materials mixed in the mixing mechanism can be downwards fed into the protective shell, the raw materials can also be filtered by means of a filter screen, then filtration can be achieved while raw material drainage is achieved, insoluble impurities are filtered out, and the recrystallization effect is improved. Therefore, the purity of crystals is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment technology, specifically relating to a recrystallization device for sodium acetate production. Background Technology

[0002] Sodium acetate, as an important organic compound, has a wide range of applications in the chemical production field. It can be used to prepare various acetate compounds, serving as a crucial raw material in the pharmaceutical, dye, and fragrance industries. In wastewater treatment, it acts as a carbon source, providing nutrients for microorganisms and promoting denitrification. It can also be used as a food additive, serving as a flavoring and preservative. In the production of sodium acetate, recrystallization is a key process step for improving its purity and removing impurities; therefore, an efficient recrystallization unit is essential for sodium acetate production.

[0003] Currently, existing recrystallization equipment for sodium acetate production has some shortcomings in practical applications. On the one hand, during the processing of raw material mixing, there is a lack of effective filtration methods, making it difficult to fully filter out insoluble impurities in the raw materials. If these impurities enter the subsequent crystallization process, they will affect the quality of sodium acetate crystallization, resulting in low crystal purity and even irregular crystal morphology, thus reducing product quality. On the other hand, existing equipment usually does not have a sound recycling mechanism for the remaining raw materials after crystallization. These remaining raw materials are often directly discharged or treated, resulting in waste of resources, increased production costs, and potential environmental pollution.

[0004] To address the aforementioned issues, there is an urgent need for a recrystallization device for sodium acetate production that can effectively filter impurities during raw material processing and enable the recycling of remaining raw materials. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the prior art, this utility model provides a recrystallization device for sodium acetate production. The recrystallization device for sodium acetate production is equipped with a filtration mechanism and a reflux mechanism, which can achieve efficient filtration after mixing raw materials to remove insoluble impurities and ensure crystallization quality. At the same time, the reflux mechanism is used to reintroduce the remaining raw materials after crystallization into the mixing mechanism for re-mixing and crystallization, reducing the waste of raw materials and improving production efficiency and economic benefits.

[0006] A recrystallization apparatus for sodium acetate production includes a protective shell, a mixing mechanism, a filtering mechanism, and a reflux mechanism, wherein:

[0007] The mixing mechanism is located on the top of the protective shell to mix the raw materials;

[0008] The filtration mechanism includes a first drain pipe, a sleeve, a filter screen, and a second drain pipe. The first drain pipe is connected to the outside of the mixing mechanism. The sleeve shell is detachably disposed at the other end of the first drain pipe. The filter screen is disposed on the inner side wall of the sleeve. The second drain pipe is disposed at the bottom of the sleeve. The other end of the second drain pipe is connected to the outer wall of the protective shell.

[0009] The reflux mechanism includes a third drain pipe, a filter element, and a three-way pipe. The third drain pipe is inserted into the lower part of the outer wall of the protective shell. The filter element is detachably connected to one end of the third drain pipe that penetrates the protective shell. One end of the three-way pipe is connected to the third drain pipe, and the other end of the three-way pipe is connected to the outside of the mixing mechanism.

[0010] Preferably, the mixing mechanism includes a storage cylinder, two heaters, and a sealing cap. The bottom of the storage cylinder is bolted to the top of the protective shell, the two heaters are fixedly installed on both sides of the inner wall of the storage cylinder, and the sealing cap is bolted to the top of the storage cylinder.

[0011] Preferably, the mixing mechanism further includes a motor, a drive shaft, and a stirring blade. The motor is fixedly installed on the top of the sealing cover, and one end of the motor output end protruding from the sealing cover is connected to the end of the drive shaft by a key. The stirring blade is fixedly installed on the outer wall of the drive shaft.

[0012] Preferably, the filtration mechanism further includes a first fixing ring, a second fixing ring, and a first water pump. The first fixing ring and the second fixing ring are respectively threaded to both ends of the outer surface of the sleeve. The output end of the first water pump is inserted into one end of the second drain pipe. The output end of the first water pump is detachably connected to the bottom of the sleeve through the second fixing ring.

[0013] Preferably, the reflux mechanism further includes a second water pump and two valves. The input end of the second water pump is connected to the other end of the third drain pipe, and the two valves are respectively fixedly installed at the two ends of the tee pipe away from the second water pump.

[0014] Preferably, a discharge mechanism is provided below the outer surface of the protective shell. The discharge mechanism includes a discharge pipe, a gasket, and a cover plate. The discharge pipe is inserted into the lower part of the outer surface of the protective shell. The cover plate is detachably connected to one end of the discharge pipe by bolts. The gasket is disposed between the discharge pipe and the cover plate.

[0015] Preferably, the bottom of the protective shell is provided with a cooling mechanism, which includes a base and a cooler. The base is bolted to the bottom of the protective shell, and the cooler is fixedly installed on the top of the base.

[0016] The beneficial effects of the above technical solution are as follows:

[0017] (1) The recrystallization device for sodium acetate production, through the combination of the first and second inlet pipes, can feed the mixed raw materials in the mixing mechanism downward into the protective shell, and can also filter the raw materials with the help of the filter screen, thereby achieving both the inlet and outlet of the raw materials and filtering out insoluble impurities to ensure the purity of the crystals.

[0018] (2) The recrystallization device for sodium acetate production, through the combination of the third inlet pipe and the three-way pipe, can introduce the remaining raw materials after crystallization back into the mixing mechanism for re-mixing and crystallization. After complete crystallization, the crystallized raw materials can be discharged outward through the three-way pipe, reducing the waste of raw materials. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall installation structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the exploded structure of the hybrid mechanism of this utility model;

[0022] Figure 4 This is an exploded view of the filtration mechanism of this utility model;

[0023] Figure 5 This is a schematic diagram of the filter mechanism of this utility model;

[0024] Figure 6 This is a schematic diagram of the reflux mechanism of this utility model;

[0025] Figure 7 This is a schematic diagram of the cooling mechanism of this utility model.

[0026] In the diagram: 1. Protective shell; 2. Mixing mechanism; 201. Storage cylinder; 202. Heater; 203. Sealing cover; 204. Motor; 205. Drive shaft; 206. Stirring blade; 3. Filtration mechanism; 301. First drain pipe; 302. First fixing ring; 303. Sleeve; 304. Filter screen; 305. Second fixing ring; 306. First water pump; 307. Second drain pipe; 4. Return mechanism; 401. Third drain pipe; 402. Filter element; 403. Second water pump; 404. T-connector; 405. Valve; 5. Discharge mechanism; 501. Discharge pipe; 502. Cover plate; 503. Washer; 6. Cooling mechanism; 601. Pad; 602. Cooler. Detailed Implementation

[0027] The foregoing and other technical contents, features and effects of this utility model are described in conjunction with the appendix below. Figures 1 to 7The embodiments are described in detail below.

[0028] This embodiment provides a recrystallization apparatus for sodium acetate production, as shown in the attached drawing, including a protective shell 1, a mixing mechanism 2, a filtering mechanism 3, and a reflux mechanism 4, wherein:

[0029] The mixing mechanism 2 is located on top of the protective shell 1 to mix the raw materials. The protective shell 1 serves as the basic support and protective carrier of the device, providing installation space for the core mechanisms such as internal mixing, filtration, and crystallization. At the same time, it isolates the external environment from interference with the internal process, ensures the integrated layout of each functional component, improves the structural stability of the device, and seals and protects the internal liquids, hot gases, and mechanical parts to ensure operational safety. It also allows for the installation of the cooling mechanism 6 at the bottom, providing a basis for temperature control during the crystallization process.

[0030] The filtration mechanism 3 includes a first drain pipe 301, a sleeve 303, a filter screen 304, and a second drain pipe 307. The first drain pipe 301 is connected to the outside of the mixing mechanism 2. The sleeve 303 is detachably disposed at the other end of the first drain pipe 301. The filter screen 304 is disposed on the inner side wall of the sleeve 303. The second drain pipe 307 is disposed at the bottom of the sleeve 303. The other end of the second drain pipe 307 is connected to the outer wall of the protective shell 1. The mixing mechanism 2 and the sleeve 303 are connected through the first drain pipe 301 to discharge the mixed material. The second drain pipe 307: The connecting sleeve 303 and the protective shell 1 are used to send the filtered material into the crystallization area, thus constructing a material transmission channel and realizing the process connection of mixing-filtration-crystallization. The pipe runs through the protective shell 1 to ensure that the material flow direction is controllable and to avoid external contamination. The sleeve 303 can be detachably installed at the end of the first inlet pipe 301 and integrates a filter screen 304 inside. The filter screen 304 intercepts insoluble impurities in the material. The pore size design of the filter screen 304 achieves precise filtration and improves the purity of the solution. The detachable structure of the sleeve 303 facilitates the regular cleaning or replacement of the filter screen 304 and maintains the filtration efficiency.

[0031] The reflux mechanism 4 includes a third inlet pipe 401, a filter element 402, and a three-way pipe 404. The third inlet pipe 401 is inserted into the lower part of the outer wall of the protective shell 1. The filter element 402 is detachably connected to one end of the third inlet pipe 401 that penetrates into the protective shell 1. One end of the three-way pipe 404 is connected to the third inlet pipe 401, and the other end of the three-way pipe 404 is connected to the outside of the mixing mechanism 2. The remaining mother liquor after crystallization is extracted from the bottom of the protective shell 1 through the third inlet pipe 401. The filter element 402 performs secondary filtration on the reflux mother liquor to remove impurities that may be generated during the crystallization process, realizes the recycling of mother liquor, and avoids the waste of raw materials caused by direct discharge. The high-precision filtration of the filter element 402 ensures the purity of the reflux mother liquor and prevents impurities from affecting the quality of secondary crystallization.

[0032] The mixing mechanism 2 includes a storage cylinder 201, two heaters 202, and a sealing cover 203. The bottom of the storage cylinder 201 is bolted to the top of the protective shell 1. The two heaters 202 are fixedly installed on both sides of the inner wall of the storage cylinder 201. The sealing cover 203 is bolted to the top of the storage cylinder 201. The storage cylinder 201 contains sodium acetate raw material and solvent, providing a mixing reaction space. The sealing cover 203 is bolted to seal the storage cylinder 201, preventing material volatilization, impurity entry, and heat loss, thus creating a closed mixing environment and avoiding external contamination affecting crystallization purity. The bolted connection design facilitates disassembly and cleaning, meeting the hygiene requirements of chemical production. The heaters 202 are symmetrically installed on the inner wall of the storage cylinder 201 to heat the raw material, promote the dissolution of sodium acetate and the mixing reaction, accurately control the mixing temperature, accelerate material dissolution, and improve mixing uniformity. The dual heater 202 design ensures heating efficiency and temperature field uniformity, avoiding local overheating.

[0033] The mixing mechanism 2 also includes a motor 204, a drive shaft 205, and a stirring blade 206. The motor 204 is fixedly installed on the top of the sealing cover 203. One end of the motor 204, which extends out of the sealing cover 203, is connected to the end of the drive shaft 205 by a key. The stirring blade 206 is fixedly installed on the outer wall of the drive shaft 205. The motor 204 drives the drive shaft 205 to rotate, thereby driving the stirring blade 206 to mechanically stir the material, force convection mixing, shorten the material dissolution time, and improve mixing efficiency. The structural design of the stirring blade 206 ensures that there are no dead corners in the stirring, guarantees the uniformity of mixing, and provides a stable solution environment for subsequent crystallization.

[0034] The filter mechanism 3 also includes a first fixing ring 302, a second fixing ring 305, and a first water pump 306. The first fixing ring 302 and the second fixing ring 305 are respectively threaded to both ends of the outer surface of the sleeve 303. The output end of the first water pump 306 is inserted into one end of the second drain pipe 307. The output end of the first water pump 306 is detachably connected to the bottom of the sleeve 303 through the second fixing ring 305. The two ends of the sleeve 303 are fixed by the fixing rings through the threaded connection to ensure sealing and structural stability. The first water pump 306 provides power to drive the material through the filter screen 304 to overcome the filtration resistance. The water pump controls the material flow rate to avoid unstable filtration efficiency caused by gravity flow. The quick disassembly and assembly design of the threaded connection facilitates maintenance and reduces downtime.

[0035] The reflux mechanism 4 also includes a second water pump 403 and two valves 405. The input end of the second water pump 403 is connected to the other end of the third diversion pipe 401. The two valves 405 are respectively fixedly installed at both ends of the three-way pipe 404 away from the second water pump 403. The mixing mechanism 2 is connected to the external discharge channel through the branch of the three-way pipe 404 to switch between mother liquor reflux and finished product discharge. The second water pump 403 provides reflux power to overcome the height difference and pipe resistance. The valves 405 control the branch flow direction of the three-way pipe 404.

[0036] A discharge mechanism 5 is provided below the outer surface of the protective shell 1. The discharge mechanism 5 includes a discharge pipe 501, a gasket 503, and a cover plate 502. The discharge pipe 501 is inserted into the lower part of the outer surface of the protective shell 1. The cover plate 502 is detachably connected to one end of the discharge pipe 501 by bolts. The gasket 503 is located between the discharge pipe 501 and the cover plate 502. The discharge pipe 501 is located at the bottom of the protective shell 1 and is used to discharge the crystallized sodium acetate product. The cover plate 502 and the gasket 503 are bolted together to seal the discharge port and prevent liquid leakage during the crystallization process.

[0037] A cooling mechanism 6 is provided at the bottom of the protective shell 1. The cooling mechanism 6 includes a pad 601 and a cooler 602. The pad 601 is connected to the bottom of the protective shell 1 by bolts. The heater 202 and the cooler 602 are both existing technologies and will not be described in detail here. The cooler 602 is fixedly installed on the top of the pad 601 and installed at the bottom of the protective shell 1 to cool the crystallization area and promote the crystallization of the sodium acetate supersaturated solution. The pad 601 supports the cooler 602, isolates the protective shell 1 from the external environment, reduces heat loss, accurately controls the crystallization temperature, forms a regular crystal shape, and improves product purity. The efficient heat dissipation design of the cooler 602 shortens the crystallization cycle and improves the production efficiency of the device.

[0038] Heater 202, motor 204, first water pump 306, second water pump 403 and cooler 602 are all electrically connected to the external control unit and are all electrically connected to the external circuit through wires.

[0039] In summary, the recrystallization apparatus for sodium acetate production operates as follows:

[0040] 1. Raw material mixing: Add sodium acetate raw material and solvent into storage cylinder 201, seal the cover 203 with bolts, start heater 202 to heat the material, and at the same time drive motor 204 to drive drive shaft 205 and stirring blade 206 to rotate, mechanically stir the material, accelerate the dissolution of sodium acetate, and achieve uniform mixing.

[0041] 2. Material filtration: The mixed material flows into the sleeve 303 through the first inlet pipe 301. The first water pump 306 provides power, so that the material passes through the filter screen 304 under pressure to intercept insoluble impurities. The filtered material is sent into the protective shell 1 through the second inlet pipe 307.

[0042] 3. Crystallization process: After the material enters the protective shell 1, the cooler 602 in the cooling mechanism 6 cools the crystallization area, causing the sodium acetate supersaturated solution to crystallize. During this process, the cover plate 502 of the discharge mechanism 5 is sealed to the discharge pipe 501 to prevent liquid leakage.

[0043] 4. Mother liquor reflux: After crystallization, the remaining mother liquor is drawn from the bottom of the protective shell 1 through the third drainage pipe 401, filtered twice by the filter element 402, and then refluxed to the mixing mechanism 2 through the three-way pipe 404 under the action of the second water pump 403 for re-mixing and crystallization.

[0044] 5. Finished product discharge: After crystallization is complete, the crystallized sodium acetate finished product is discharged from the discharge pipe 501. The cover plate 502 can be removed for manual cleaning or inspection of residual materials at the bottom of the crystallization chamber.

[0045] The above description is only for illustrating the present utility model. It should be understood that the present utility model is not limited to the above embodiments, and various modifications that conform to the concept of the present utility model are within the protection scope of the present utility model.

Claims

1. A recrystallization apparatus for sodium acetate production, characterized in that, It includes a protective shell (1), a mixing mechanism (2), a filtering mechanism (3), and a reflux mechanism (4), wherein: The mixing mechanism (2) is located on top of the protective shell (1) to mix the raw materials; The filtration mechanism (3) includes a first drain pipe (301), a sleeve (303), a filter screen (304), and a second drain pipe (307). The first drain pipe (301) is connected to the outside of the mixing mechanism (2). The sleeve (303) is detachably disposed at the other end of the first drain pipe (301). The filter screen (304) is disposed on the inner side wall of the sleeve (303). The second drain pipe (307) is disposed at the bottom of the sleeve (303). The other end of the second drain pipe (307) is connected to the outer wall of the protective shell (1). The reflux mechanism (4) includes a third drain pipe (401), a filter element (402), and a three-way pipe (404). The third drain pipe (401) is inserted into the lower part of the outer wall of the protective shell (1). The filter element (402) is detachably connected to one end of the third drain pipe (401) that penetrates into the protective shell (1). One end of the three-way pipe (404) is connected to the third drain pipe (401), and the other end of the three-way pipe (404) is connected to the outside of the mixing mechanism (2).

2. The recrystallization apparatus for sodium acetate production according to claim 1, characterized in that: The mixing mechanism (2) includes a storage cylinder (201), two heaters (202) and a sealing cap (203). The bottom of the storage cylinder (201) is bolted to the top of the protective shell (1). The two heaters (202) are fixedly installed on both sides of the inner wall of the storage cylinder (201). The sealing cap (203) is bolted to the top of the storage cylinder (201).

3. The recrystallization apparatus for sodium acetate production according to claim 2, characterized in that: The mixing mechanism (2) also includes a motor (204), a drive shaft (205), and a stirring blade (206). The motor (204) is fixedly installed on the top of the sealing cover (203). One end of the output end of the motor (204) that protrudes from the sealing cover (203) is connected to the end of the drive shaft (205) by a key. The stirring blade (206) is fixedly installed on the outer wall of the drive shaft (205).

4. The recrystallization apparatus for sodium acetate production according to claim 1, characterized in that: The filtration mechanism (3) further includes a first fixing ring (302), a second fixing ring (305), and a first water pump (306). The first fixing ring (302) and the second fixing ring (305) are respectively threaded to both ends of the outer surface of the sleeve (303). The output end of the first water pump (306) is inserted into one end of the second drain pipe (307). The output end of the first water pump (306) is detachably connected to the bottom of the sleeve (303) through the second fixing ring (305).

5. A recrystallization apparatus for sodium acetate production according to claim 1, characterized in that: The reflux mechanism (4) also includes a second water pump (403) and two valves (405). The input end of the second water pump (403) is connected to the other end of the third drain pipe (401), and the two valves (405) are respectively fixedly installed at both ends of the three-way pipe (404) away from the second water pump (403).

6. A recrystallization apparatus for sodium acetate production according to claim 1, characterized in that: A discharge mechanism (5) is provided below the outer surface of the protective shell (1). The discharge mechanism (5) includes a discharge pipe (501), a washer (503) and a cover plate (502). The discharge pipe (501) is inserted into the lower part of the outer surface of the protective shell (1). The cover plate (502) is detachably connected to one end of the discharge pipe (501) by bolts. The washer (503) is disposed between the discharge pipe (501) and the cover plate (502).

7. A recrystallization apparatus for sodium acetate production according to claim 1, characterized in that: The bottom of the protective shell (1) is provided with a cooling mechanism (6), which includes a pad (601) and a cooler (602). The pad (601) is connected to the bottom of the protective shell (1) by bolts, and the cooler (602) is fixedly installed on the top of the pad (601).

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