Precooling system of isovitamin C refining fluidized bed

Abstract

The utility model relates to a precooling system of a different vitamin C refining fluidized bed, which comprises an air inlet box body arranged at an inlet of a precooling fan of the fluidized bed, an S-shaped refrigeration pipe covering the cross section of the air inlet box body is arranged at the inlet of the air inlet box body, and the ends of the two sides of the S-shaped refrigeration pipe are sleeved in through holes in side plates of the air inlet box body. An inlet of the S-shaped refrigeration pipe is connected with an ethylene glycol input pipe, an outlet of the S-shaped refrigeration pipe is connected with an ethylene glycol output pipe, and the outer port of the air inlet box body is covered with a filter screen. The circulation is formed in the S-shaped refrigeration pipe through ethylene glycol to generate a refrigeration effect, and external natural air generates heat exchange when passing through the S-shaped refrigeration pipe to be quickly cooled, so that the temperature of materials in the fluidized bed can be efficiently reduced, and the specified discharging temperature lower than 40 DEG C is ensured.

Description

Technical Field

[0001] The utility model relates to the field of vitamin production equipment, in particular to an iso-vitamin C refining fluidized bed precooling system. Background Art

[0002] Fluidized bed has the advantages of stable operation, low energy consumption and uniform drying, and has been widely used in the refined production of isovitaminosis C.

[0003] Fluidized beds are commonly used in the crystal growth and drying processes of refined iso-vitamin C production. During crystal growth, the fluidized bed provides uniform solution mixing and heat transfer, helping to control crystal size and shape. During the drying process, the fluidized bed disperses and rapidly dries wet crystal particles through airflow, evaporating moisture and methanol from the material.

[0004] During the fluidized bed production process, heat exchange is required to bring the material to the specified temperature (discharge temperature ≤ 40°C). Currently, cooling is mainly achieved by introducing natural air through a fan. The cooling effect is poor and the efficiency is low. In addition, impurities in the air are easily sucked into the fluidized bed during the introduction of natural air, causing material contamination and affecting product purity. This needs to be improved. Utility Model Content

[0005] In order to solve the above problems, the utility model proposes a fluidized bed precooling system for refining iso-vitamin C.

[0006] The technical solution of the utility model is: a fluidized bed precooling system for refining isovitaminosis C, comprising an air inlet box installed at the inlet of a precooling fan of a fluidized bed, the cross-section of the air inlet box being square, an S-shaped refrigeration pipe covering the cross-section of the air inlet box being provided at the inlet of the air inlet box, the ends on both sides of the S-shaped refrigeration pipe being fitted into through holes on the side panels of the air inlet box, an ethylene glycol input pipe being connected to the inlet of the S-shaped refrigeration pipe, the ethylene glycol input pipe being connected to an ethylene glycol storage tank, a centrifugal pump being provided on the ethylene glycol input pipe, an ethylene glycol output pipe being connected to the outlet, the ethylene glycol output pipe being connected to the ethylene glycol storage tank, and a filter screen being covered on the outer port of the air inlet box.

[0007] Preferably, there are at least two S-shaped refrigeration tubes, the inlets of the S-shaped refrigeration tubes are connected to the ethylene glycol input tube, the outlets are connected to the ethylene glycol output tube, and the transverse tubes of adjacent S-shaped refrigeration tubes are arranged in an up-and-down staggered manner.

[0008] Preferably, square insulation boxes are provided on both sides of the air inlet box body, and the insulation boxes on both sides respectively cover the ends of the S-shaped refrigeration pipe on both sides.

[0009] Preferably, the insulation box is filled with insulation filler, and the insulation filler covers the end of the S-shaped refrigeration tube.

[0010] Preferably, a conical guide section is provided at the inner end of the air inlet box, and a small-sized port of the conical guide section is connected to the inlet of the pre-cooling fan.

[0011] Preferably, the outer port of the air inlet box body is provided with a square frame pressure plate, the four corners of the square frame pressure plate are provided with through holes, screws are inserted into the through holes, and the filter screen is fixed to the outer port of the air inlet box body through the frame pressure plate.

[0012] (1) The utility model arranges a plurality of S-shaped refrigeration tubes in parallel at the inlet of the pre-cooling fan of the fluidized bed. The refrigeration effect is generated by circulating ethylene glycol through the S-shaped refrigeration tubes. When the external natural wind passes through the S-shaped refrigeration tubes, heat exchange is generated and the temperature is quickly cooled. Therefore, the temperature of the material in the fluidized bed can be reduced efficiently to ensure that it reaches the specified discharge temperature below 40°C.

[0013] (2) The utility model covers the air inlet box entrance of the pre-cooling fan with a filter screen through a square frame-shaped pressure plate, and the impurities and dust in the air are filtered out by the filter screen. During the process of introducing natural wind, the impurities and dust in the air will not be sucked into the fluidized bed, thereby avoiding material contamination and ensuring the purity of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 yes Figure 1 AA-direction cross-sectional structural diagram;

[0016] Figure 3 yes Figure 2 BB-direction cross-sectional structural diagram;

[0017] Figure 4 This is one of the three-dimensional structural diagrams of the utility model without the insulation box;

[0018] Figure 5 This is the second schematic diagram of the three-dimensional structure of the utility model without the insulation box;

[0019] In the figure, 11. pre-cooling fan, 12. air inlet box, 121. conical guide section, 13. S-shaped refrigeration pipe, 141. ethylene glycol input pipe, 142. ethylene glycol output pipe, 15. filter, 16. insulation box, 161. insulation filler, 17. square frame pressure plate. DETAILED DESCRIPTION

[0020] Example 1, see the attached Figure 1-3, a fluidized bed precooling system for refining isovitaminosis C, the system includes an air inlet box 12 installed at the inlet of a precooling fan 11 of a fluidized bed, an S-shaped refrigeration pipe 13 covering the cross section of the air inlet box 12 is provided at the inlet of the air inlet box 12, the tube bodies in the S-shaped refrigeration pipe 13 structure are relatively dense, which can maximize the coverage area of ​​the air inlet box 12 and improve the cooling effect of natural wind, the end heads on both sides of the S-shaped refrigeration pipe 13 are sleeved in the through holes on the side panels of the air inlet box 12, and the S-shaped refrigeration pipe 13 is provided at the inlet of the air inlet box 12. The inlet of the tube 13 is connected to an ethylene glycol input pipe 141, and the outlet is connected to an ethylene glycol output pipe 142. By introducing ethylene glycol into the S-shaped refrigeration tube 13, a circulation is formed to produce a refrigeration effect. When the external natural wind passes through the S-shaped refrigeration tube 13, heat exchange is generated and the temperature is quickly cooled. Ethylene glycol is used as a refrigerant, which has good cooling and antifreeze properties and is suitable for refrigeration and heat preservation in low temperature environments. The outer port of the air inlet box 12 is covered with a filter 15, through which impurities and dust in the air are filtered out.

[0021] In this embodiment, a square frame-shaped pressing plate 17 is provided at the outer port of the air inlet box 12, through which the filter 15 is fixed to the outer port of the air inlet box 12, making it easy to disassemble and replace the filter 15 and ensuring its filtering effect.

[0022] In this embodiment, a conical guide section 121 is provided at the inner end of the air inlet box 12. The small-sized port of the conical guide section 121 is connected to the inlet of the pre-cooling fan 11. The conical guide section 121 increases the air flow rate, thereby increasing the air intake volume in the fan.

[0023] The working process of this embodiment is as follows: the pre-cooling fan 11 is started, and the outer port of the air inlet box 12 draws in air. During this process, the filter 15 filters out the dust carried in the air, and then the filtered natural wind passes through the S-shaped refrigeration tube 13. The natural wind and the S-shaped refrigeration tube 13 produce heat exchange and are quickly cooled. The cold air enters the fluidized bed and produces heat exchange with the material, reducing the material temperature and ensuring that the material is discharged at a temperature below 40°C.

[0024] Example 2, see the attached Figure 2-4 The S-shaped refrigeration tubes 13 are at least two in number, and in this embodiment, four are arranged side by side. When the four refrigeration tubes are arranged side by side, the refrigeration effect is better. The inlets of these S-shaped refrigeration tubes 13 are connected to the ethylene glycol input pipe 141, and the outlets are connected to the ethylene glycol output pipe 142. Ethylene glycol is input into the S-shaped refrigeration tube 13 through the ethylene glycol input pipe 141, and then output from the ethylene glycol output pipe 142 to form a cycle. The horizontal tube bodies of adjacent S-shaped refrigeration tubes 13 are staggered up and down. The staggered arrangement can further increase the coverage area of ​​the S-shaped refrigeration tube 13 at the port, and the heat exchange is more sufficient.

[0025] In this embodiment, an insulation box 16 is provided on both sides of the air inlet box 12. The insulation boxes 16 on both sides respectively cover the ends of the S-shaped refrigeration tube 13 on both sides. The insulation boxes 16 are filled with insulation fillers 161. The insulation boxes 16 and the insulation fillers 161 can avoid the serious problem of heat loss at the ends of the S-shaped refrigeration tube 13 on both sides.

Claims

1. A fluidized bed precooling system for refining iso-vitamin C, characterized by: It includes an air inlet box installed at the inlet of a precooling fan of a fluidized bed, an S-shaped refrigeration pipe covering the cross-section of the air inlet box is provided at the inlet of the air inlet box, ends on both sides of the S-shaped refrigeration pipe are inserted into through holes on the side panels of the air inlet box, an ethylene glycol input pipe is connected to the inlet of the S-shaped refrigeration pipe, an ethylene glycol output pipe is connected to the outlet, and a filter screen is covered on the outer port of the air inlet box.

2. The fluidized bed precooling system for refining iso-vitamin C according to claim 1, characterized in that: The S-shaped refrigeration tubes are at least two inlets, the inlets of the S-shaped refrigeration tubes are connected to the ethylene glycol input tube, the outlets are connected to the ethylene glycol output tube, and the transverse tube bodies of adjacent S-shaped refrigeration tubes are arranged alternately up and down.

3. The fluidized bed precooling system for refining iso-vitamin C according to claim 1, characterized in that: Both sides of the air inlet box are provided with insulation boxes, and the insulation boxes on both sides respectively cover the ends of both sides of the S-shaped refrigeration pipe.

4. The fluidized bed precooling system for refining iso-vitamin C according to claim 3, characterized in that: The heat-insulating box is filled with heat-insulating fillers.

5. The fluidized bed precooling system for refining iso-vitamin C according to claim 1, characterized in that: A conical guide section is provided at the inner end of the air inlet box, and a small-sized port of the conical guide section is connected to the inlet of the pre-cooling fan.

6. The fluidized bed precooling system for refining iso-vitamin C according to claim 1, characterized in that: The outer port of the air inlet box body is provided with a square frame-shaped pressing plate, through which the filter screen is fixed to the outer port of the air inlet box body.

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