Tube array circulation heating type modified starch air drying device

Abstract

The utility model relates to a tube nest circulating heating type modified starch air drying device, which is characterized in that a lower port of an airflow tower is provided with a mixing bin heater, an outlet of the heater is connected with an inlet of the mixing bin, and a high-pressure fan is connected with an inlet of the heater; the heater comprises a square cylinder shell, a plurality of groups of tube nests are arranged between symmetrical side plates of the square cylinder shell side by side, each group of tube nests comprises a plurality of circular tube bodies which are arranged at equal intervals, the circular tube bodies are correspondingly sleeved in sleeving holes formed in the side plates, groove plates are arranged on the outer side surfaces of the side plates, and the circular tube bodies are communicated with the closed cavity; according to the device, air is introduced into the square cylinder shell through the high-pressure fan, meanwhile, hot steam is introduced into the circular pipe bodies which are densely arranged side by side in the square cylinder shell from the heat inlet main pipe and is discharged from the heat outlet main pipe to form a high-efficiency circulating heating system, and when air passes through, heat of the circular pipe bodies is taken away and enters the airflow tower to heat starch; the mode of introducing the hot steam to heat the air to form the drying airflow is low in cost, and drying cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of modified starch production, in particular to a tube-type circulating heating type modified starch air drying device. Background Art

[0002] Modified starch is starch that has undergone physical, chemical, or enzymatic treatment to alter the functional groups on the starch molecules or the properties of the starch granules, thereby changing its natural properties. These properties include gelatinization temperature, hot viscosity and its stability, freeze-thaw stability, gel strength, film-forming properties, and transparency. It is widely used in the food, feed, and pharmaceutical industries. Modified starch involves production processes such as refining, dehydration, drying, and packaging. The drying process for modified starch typically involves airflow drying, which brings hot air into direct contact with the starch granules to be dried, suspending the granules in the fluid and rapidly removing moisture. This method offers the advantages of low equipment investment, short drying times, and protection from external contamination. Currently, the heat source for airflow drying is primarily provided by hot air blowers. Hot air blowers are more suitable for drying small batches of starch. For drying large batches of modified starch, hot air blowers consume significant amounts of electricity, resulting in high energy costs and hindering production cost reduction. Utility Model Content

[0003] In order to solve the above problems, the utility model proposes a tube-circulating heating type modified starch air drying device.

[0004] The technical solution of the utility model is: a tube-type circulating heating modified starch air drying device, comprising an airflow tower, a heater and a high-pressure fan, a mixing chamber is provided at the lower port of the airflow tower, the diameter of the mixing chamber is larger than the size of the airflow tower, the mixing chamber is mounted on a square frame bracket, the outlet of the heater is connected to the inlet of the mixing chamber, the high-pressure fan is connected to the inlet of the heater, and the high-pressure fan and the heater are mounted on an integrated bracket; the heater comprises a square cylindrical shell, and a plurality of groups of tubes are arranged side by side between the mutually symmetrical side plates of the square cylindrical shell, and the tube groups can basically cover the square cylindrical shell. The cross section of the cylinder shell, each group of tubes includes a number of circular tubes arranged at equal intervals, the circular tubes are correspondingly sleeved in the sleeve holes set in the side plates, the circular tubes and the sleeve holes are fixed by welding, and a groove plate is provided on the outer side of the side plate. The cross section of the groove plate is an overall V-shaped structure, and a closed chamber is formed between the groove plate and the side plate. The circular tube is connected to the closed chamber, and a heat inlet hole is provided at the end of the groove plate on one side, and a heat outlet hole is provided at the end of the groove plate on the other side. The heat inlet hole is located at one end of the corresponding groove plate, and the heat outlet hole is located at the other end of the corresponding groove plate.

[0005] Preferably, a plurality of annular heat dissipation plates are coaxially fixedly mounted on the outer side of the circular tube body, the annular heat dissipation plates are spaced the same from each other, and the annular heat dissipation plates extend to both ends of the circular tube body.

[0006] Preferably, the circular tubes in adjacent groups of tubes are arranged alternately.

[0007] Preferably, at least three square cylindrical shells are provided, and the square cylindrical shells are fixedly connected as a whole by flanges, and the connecting holes on the flanges are configured as oblong holes capable of fine-tuning the position.

[0008] Preferably, a heat inlet branch pipe is installed on the heat inlet hole, and the heat inlet branch pipes are connected to each other through a heat inlet main pipe. A heat outlet branch pipe is installed on the heat outlet hole, and the heat outlet branch pipes are connected to each other through a heat outlet main pipe. One end of the heat inlet main pipe and the heat outlet branch pipe are both closed structures, and the port at the other end is provided with a flange.

[0009] Preferably, one port of the square cylindrical shell is connected to an air inlet hood with a tapered shape, and the port of the air inlet hood is connected to the outlet of the high-pressure blower through a flange. The port of the air inlet hood is a square port, and the other port of the square cylindrical shell is connected to an air guide hood with a tapered shape, and the air guide hood is connected to the inlet pipe of the mixing bin through a flange, and the outer port of the air guide hood is a circular port.

[0010] Preferably, the outer port of the air inlet cover is provided with a support net, and a layer of air filter cotton is provided on the outer side of the support net.

[0011] The beneficial technical effects of the utility model are:

[0012] (1) The device introduces air into the square cylindrical shell through a high-pressure fan, and at the same time introduces hot steam from the heat inlet main pipe into the circular tubes densely arranged side by side in the square cylindrical shell, and discharges it from the heat outlet main pipe to form a high-efficiency circulating heating system. When the air passes through, it takes away the heat of the circular tubes and enters the air flow tower to heat the starch. This method of introducing hot steam to heat the air to form a drying airflow has a low energy cost and is conducive to reducing the drying cost of large-scale modified starch production.

[0013] (2) The annular heat sink on the circular tube of the device is used to draw out the heat inside the circular tube, so that the heat can extend to the surface of the annular heat sink, thereby increasing the contact area between the circular tube and the air, heating more fully, and improving the efficiency of heat utilization. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] Figure 2 It is a schematic diagram of the three-dimensional structure of the heater;

[0016] Figure 3 It is a schematic diagram of the main structure of the heater;

[0017] Figure 4 yes Figure 3 AA-direction cross-sectional structural diagram;

[0018] Figure 5 yes Figure 4 BB-direction cross-sectional structural diagram;

[0019] Figure 6 It is a schematic diagram of the three-dimensional structure of the square cylinder shell;

[0020] Figure 7 It is a schematic diagram of the three-dimensional structure of the support net and air filter cotton set at the air inlet cover port;

[0021] Figure 8 It is a schematic diagram of the three-dimensional structure of a circular tube.

[0022] In the figure, 11. air flow tower, 111. mixing bin, 112. feed hopper, 12. high-pressure fan, 03. heater, 31. square cylinder shell, 311. socket hole, 32. circular tube body, 321. annular heat sink, 33. groove plate, 331. heat inlet hole, 34. closed chamber, 351. heat inlet branch pipe, 352. heat inlet main pipe, 353. heat outlet branch pipe, 354. heat outlet main pipe, 361. air inlet hood, 362. air guide hood, 371. support net, 372. air filter cotton. DETAILED DESCRIPTION

[0023] Example 1, see attached Figure 1-8 A tube-type circulating heating modified starch air drying device comprises an airflow tower 11, a heater 03 and a high-pressure blower 12. A mixing chamber 111 is provided at the lower end of the airflow tower 11. The mixing chamber is mounted on a square frame bracket. The outlet of the heater 03 is connected to the inlet of the mixing chamber 111. A conical feed hopper 112 is provided in the middle of the side wall of the mixing chamber 111. The high-pressure blower 12 is connected to the inlet of the heater 03. Air is introduced into the heater 03 through the high-pressure blower 12. The heater 03 comprises a square cylindrical shell 31. The mutually symmetrical side plates of the square cylindrical shell 31 are provided side by side. There are several groups of tubes, each group of tubes includes several circular tubes 32 arranged at equal intervals. Appropriate spacing is set between the circular tubes 32 to ensure that air can pass through at high speed. The circular tubes 32 are correspondingly sleeved in the socket holes 311 set on the side panels, and a groove plate 33 is provided on the outer side of the side panels. A closed chamber 34 is formed between the groove plate and the side panels. The circular tubes 32 are connected to the closed chamber, and hot steam is evenly distributed to each circular tube 32 through the closed chamber 34. A heat inlet hole 331 is provided at the end of the groove plate 33 on one side, and a heat outlet hole 332 is provided at the end of the groove plate 33 on the other side.

[0024] A plurality of annular heat sinks 321 are coaxially fixedly mounted on the outer side of the circular tube 32. The spacing between the annular heat sinks 321 is the same. The annular heat sinks are used to draw out the heat inside the circular tube 32 so that the heat can extend to the surface of the annular heat sinks, thereby increasing the contact area between the circular tube 32 and the air, making the heating more sufficient and improving the heat utilization effect.

[0025] The circular tubes 32 in adjacent groups of tubes are arranged in a staggered manner. This arrangement is used to ensure that the circular tubes 32 cover the entire cross section of the square cylindrical shell 31 as evenly as possible, thereby improving heating efficiency.

[0026] One port of the square cylindrical shell 31 is connected to a tapered air inlet hood 361, and the port of the air inlet hood is connected to the outlet of the high-pressure fan 12 through a flange. The other port of the square cylindrical shell 31 is connected to a tapered air guide hood 362, and the air guide hood is connected to the inlet pipe of the mixing bin 111 through a flange. The air inlet hood 361 is used to evenly distribute the air introduced by the high-pressure fan 12 into the cross-sectional area of ​​the square cylindrical shell 31 so that the airflow can be evenly in contact with the circular tube body 32. The air guide hood 362 is used to concentrate the heated airflow so that it enters the mixing bin 111 at the lower end of the airflow tower 11 in a high-temperature state.

[0027] A support net 371 is provided at the outer port of the air inlet cover 361, and a layer of air filter cotton 372 is provided on the outer side of the support net. The filter cotton is supported by the support net 371 and is used to filter out debris in the air to avoid contamination of deformed starch caused by drying airflow.

[0028] The working process of the drying device is as follows: hot steam is introduced into the closed chamber 34 on the side of the square cylindrical shell 31 from the heat inlet hole 331, and the hot steam is evenly distributed to each circular tube 32 through the closed chamber. After the hot steam heats the circular tube, it enters the closed chamber 34 on the other side and is discharged from the heat outlet hole 332. During this process, the high-pressure fan 12 introduces air into the square cylindrical shell 31, so that the air contacts the densely arranged circular tubes 32. The air takes away the heat of the circular tubes 32 to form a hot air flow that enters the mixing bin 111 at the bottom of the air flow tower 11. After the hot air flow is fully mixed and contacted with the starch, it enters the air flow tower 11 upward for further heating and drying, and then enters the next process from the branch pipe at the top of the air flow tower 11.

[0029] Example 2, see attached Figure 2-6This embodiment is basically the same as the first embodiment, except that at least three square cylindrical shells 31 are provided, and the square cylindrical shells 31 are fixedly connected as a whole by flanges, and a heat inlet branch pipe 351 is installed on the heat inlet hole 331, and the heat inlet branch pipes are interconnected by a heat inlet main pipe 352. Hot steam enters each branch pipe synchronously from the heat inlet branch pipe 351, and enters the closed chamber 34 from the branch pipe, and is evenly distributed to each circular tube body 32. A heat outlet branch pipe 353 is installed on the heat outlet hole 332, and the heat outlet branch pipes 353 are interconnected by a heat outlet main pipe 354. After passing through the circular tube body 32, the hot steam enters the closed chamber 34 on the other side, and enters the heat outlet main pipe 354 from each branch pipe for discharge, thereby forming a circulation heating for the circular tube body 32.

[0030] In this embodiment, the number of combined square cylindrical shells 31 can be selected according to the production scale requirements, thereby adjusting the air drying power to accurately match the production situation and avoid energy waste caused by excess heat energy.

Claims

1. A tube-type circulating heating modified starch air drying device, characterized by: It includes an air flow tower, a heater and a high-pressure fan. The lower port of the air flow tower is provided with a mixing bin, which is installed on a square frame bracket. The outlet of the heater is connected to the inlet of the mixing bin, and the high-pressure fan is connected to the inlet of the heater. The heater includes a square cylindrical shell. Several groups of tubes are arranged side by side between the mutually symmetrical side plates of the square cylindrical shell. Each group of tubes includes several circular tubes arranged at equal intervals. The circular tubes are correspondingly sleeved in the socket holes provided on the side plates, and groove plates are provided on the outer side surfaces of the side plates. A closed chamber is formed between the groove plate and the side plates. The circular tubes are connected to the closed chamber, and a heat inlet hole is provided at the end of the groove plate on one side, and a heat outlet hole is provided at the end of the groove plate on the other side.

2. The tube-type circulating heating modified starch air drying device according to claim 1, characterized in that: A plurality of annular heat dissipation plates are coaxially fixedly sleeved on the outer side surface of the circular tube, and the spacing between the annular heat dissipation plates is the same.

3. The tube-type circulating heating modified starch air drying device according to claim 1, characterized in that: The circular tubes in adjacent groups of tubes are arranged alternately.

4. The tube-type circulating heating modified starch air drying device according to claim 1, characterized in that: The square cylindrical shells are provided in at least three numbers, and the square cylindrical shells are fixedly connected as a whole by flanges.

5. The tube-type circulating heating modified starch air drying device according to claim 4, characterized in that: The heat inlet holes are provided with heat inlet branch pipes, which are connected to each other through a heat inlet main pipe; the heat outlet holes are provided with heat outlet branch pipes, which are connected to each other through a heat outlet main pipe.

6. The tube-type circulating heating modified starch air drying device according to claim 1, characterized in that: One port of the square cylindrical shell is connected to a tapered air inlet hood, and the port of the air inlet hood is connected to the outlet of the high-pressure blower through a flange. The other port of the square cylindrical shell is connected to a tapered air guide hood, and the air guide hood is connected to the inlet pipe of the mixing bin through a flange.

7. The tube-type circulating heating modified starch air drying device according to claim 6, characterized in that: The outer port of the air inlet cover is provided with a supporting net, and a layer of air filter cotton is provided on the outer side of the supporting net.

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