Boiling dryer for extracting steady-state anthocyanin

Abstract

The boiling dryer comprises an upper barrel body, a middle barrel body, a lower barrel body and a bottom barrel, a material barrel is arranged in the middle barrel body, a heating channel is arranged between the middle barrel body and the material barrel, a vent hole is formed in the side portion of the material barrel, an air flow splitter plate is arranged at the bottom of the material barrel, and an air outlet is formed in the bottom of the air flow splitter plate. A plurality of first inclined nozzles and second inclined nozzles which are annularly distributed are arranged on the airflow splitter plate, and the inclination angles of the first inclined nozzles and the second inclined nozzles are complementary; an air outlet pipe set is arranged in the lower barrel, the air inlet end of the air outlet pipe set is communicated with the air inlet assembly, and the air outlet end of the air outlet pipe set is communicated with the middle barrel. The drying device has the characteristics of increasing the contact area of hot air and materials and shortening the drying time.

Description

Technical Field

[0001] The utility model relates to anthocyanin extraction equipment, in particular to a boiling dryer for extracting stabilized anthocyanin. Background Art

[0002] Anthocyanins are a class of compounds formed by the glycosidic bond between flower pigments and sugars. They are widely found in the cell sap of flowers, fruits, stems, leaves and roots of plants. They are natural pigments of many plants and have biological activities such as antioxidant, anti-inflammatory and anti-cancer. Therefore, they are widely used in food, medicine and cosmetics. Common anthocyanin extraction methods include water extraction, organic solvent extraction, supercritical fluid extraction, microwave-assisted extraction, etc. The equipment required includes extraction tanks, boiling dryers, filtration devices, concentration devices, etc.

[0003] The application of fluidized bed dryer in anthocyanin extraction is mainly to remove the extraction solvent from the extract to obtain dry anthocyanin powder or extract. The fluidized bed dryer uses air heated by a heat exchanger to form hot air that is distributed into the main unit through a valve plate, causing the solvent to form a boiling state in the dryer, changing from liquid to gas, and taking the solvent away through gas flow, leaving the dry target substance in the end.

[0004] However, the existing fluidized bed dryer mainly dries by introducing hot air from one angle. This drying method reduces the contact area between the hot air and the material and the contact position is single, which increases the drying time. Utility Model Content

[0005] The purpose of the utility model is to provide a boiling dryer for extracting stabilized anthocyanin. The utility model has the characteristics of increasing the contact area between hot air and materials and shortening the drying time.

[0006] The technical solution of the utility model is as follows: a boiling dryer for extracting stabilized anthocyanins comprises an upper cylinder, a middle cylinder, a lower cylinder and a bottom cylinder, wherein a barrel is arranged in the middle cylinder, a heating channel is arranged between the middle cylinder and the barrel, a vent is arranged on the side of the barrel, an air flow diverter plate is arranged at the bottom of the barrel, a plurality of first inclined nozzles and second inclined nozzles distributed in an annular manner are arranged on the air flow diverter plate, and the inclination angles of the first inclined nozzle and the second inclined nozzle are complementary; an air outlet pipe group is arranged in the lower cylinder, an air inlet end of the air outlet pipe group is connected to an air inlet assembly, and an air outlet end of the air outlet pipe group is connected to the middle cylinder.

[0007] In the aforementioned fluidized bed dryer for extracting stabilized anthocyanins, the first inclined nozzle and the second inclined nozzle are arranged adjacent to each other in an alternating manner, and the nozzle diameter of the first inclined nozzle is larger than the nozzle diameter of the second inclined nozzle.

[0008] In the aforementioned boiling dryer for extracting stabilized anthocyanins, the air intake assembly includes an internal heater located in the bottom cylinder, one end of the internal heater is connected to the air outlet pipe group through a pipeline, and the other end of the internal heater is connected to a filter, an external heater and an induced draft fan in sequence through a pipeline.

[0009] In the aforementioned boiling dryer for extracting stabilized anthocyanins, the air outlet pipe group includes a hollow positioning plate connected to the air inlet component, and a plurality of annularly distributed airflow pipes are arranged on the positioning plate, and air outlet holes are arranged on the side walls and tops of the airflow pipes.

[0010] In the aforementioned boiling dryer for extracting stabilized anthocyanins, a screen is rotatably connected inside the barrel, a rotating motor is provided on the positioning plate, a connecting rod is provided on the output shaft of the rotating motor, and the connecting rod passes through the air flow diverter plate and is fixedly connected to the screen.

[0011] In the aforementioned boiling dryer for extracting stabilized anthocyanins, the sieve comprises a first sieve plate and a second sieve plate arranged in sequence from top to bottom, and the aperture of the second sieve plate is smaller than the aperture of the first sieve plate.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The anthocyanin extract in the utility model enters into the barrel, and through the heating channel and the air flow splitter plate arranged in the middle barrel body, the hot air sprayed from the air outlet pipe group enters from the bottom and side of the barrel respectively, thereby expanding the air intake range, promoting a large range of gas-solid two-phase flow of the anthocyanin extract during the drying process, and increasing the contact area between the hot air and the anthocyanin extract, thereby achieving a rapid drying effect; a first annular inclined nozzle and a second inclined nozzle are arranged on the air flow splitter plate to further split the hot air, realize multi-directional and multi-position swirl in the barrel, promote multi-directional tumbling of the material, make the material fully dried, and improve the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] The markings in the accompanying drawings are: 1. upper cylinder; 2. middle cylinder; 21. barrel; 221. first screen plate; 222. second screen plate; 23. vent; 24. air flow diverter plate; 25. first inclined nozzle; 26. second inclined nozzle; 3. lower cylinder; 31. air outlet pipe group; 32. positioning plate; 33. air flow pipe; 34. air outlet; 35. rotating motor; 4. bottom cylinder; 41. air intake assembly; 42. internal heater; 43. filter; 44. external heater; 45. induced draft fan. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0017] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] Example:

[0019] like Figure 1 As shown, a boiling dryer for extracting stabilized anthocyanins comprises an upper cylinder 1, a middle cylinder 2, a lower cylinder 3 and a bottom cylinder 4, wherein a barrel 21 is arranged in the middle cylinder 2, a heating channel is arranged between the middle cylinder 2 and the barrel 21, a vent 23 is arranged on the side of the barrel 21, an air flow diverter plate 24 is arranged at the bottom of the barrel 21, a plurality of first inclined nozzles 25 and second inclined nozzles 26 distributed in an annular manner are arranged on the air flow diverter plate 24, and the inclination angles of the first inclined nozzles 25 and the second inclined nozzles 26 are complementary; an air outlet pipe group 31 is arranged in the lower cylinder 3, an air inlet end of the air outlet pipe group 31 is connected to an air inlet assembly 41, and an air outlet end of the air outlet pipe group 31 is connected to the middle cylinder 2.

[0020] The anthocyanin extract enters the barrel 21, and through the heating channel and the air flow diverter plate 24 arranged in the middle barrel 2, the hot air ejected from the air outlet pipe group 31 enters from the bottom and side of the barrel 21 respectively, thereby expanding the air intake range, promoting a large range of gas-solid two-phase flow of the anthocyanin extract during the drying process, and increasing the contact area between the hot air and the anthocyanin extract, thereby achieving a rapid drying effect; a first annular inclined nozzle 25 and a second inclined nozzle 26 are arranged on the air flow diverter plate 24 to further divert the hot air, realize multi-directional and multi-position swirl in the barrel 21, promote multi-directional tumbling of the material, make the material fully dried, and improve the drying efficiency.

[0021] The first inclined nozzle 25 and the second inclined nozzle 26 are arranged adjacent to each other in an alternating manner, and the nozzle diameter of the first inclined nozzle 25 is larger than the nozzle diameter of the second inclined nozzle 26. Using nozzle diameters of different sizes for air discharge forms different air discharge speeds, forms multiple turbulences, and improves the material drying effect.

[0022] The air intake assembly 41 includes an inner heater 42, one end of which is connected to the air outlet pipe group 31 through a pipeline, and the other end of the inner heater 42 is connected to a filter 43, an outer heater 44 and an induced draft fan 45 in sequence through a pipeline. The air intake assembly 41 of the present application uses a secondary heating method to perform heat exchange on the external fresh air, and performs filtering after primary heating. Since filtering will cause heat loss, the filtered airflow is heated for a second time in the bottom cylinder 4, so that the hot air temperature injected into the middle cylinder 2 is higher and the thermal drying is more complete.

[0023] The air outlet pipe group 31 includes a hollow positioning plate 32 connected to the air inlet assembly 41, and a plurality of annularly distributed airflow pipes 33 are provided on the positioning plate 32, and air outlet holes 34 are provided on the side walls and the top of the airflow pipes 33. The air outlet holes 34 in multiple directions on the multiple airflow pipes 33 disperse the introduced hot air, so as to provide hot air flow to the airflow splitter plate 24 and the heating channel respectively, and form hot air in different heating directions in the middle cylinder 2.

[0024] The barrel 21 is rotatably connected to a screen, the positioning plate 32 is provided with a rotary motor 35, the output shaft of the rotary motor 35 is provided with a connecting rod, and the connecting rod passes through the air flow splitter plate 24 and is fixedly connected to the screen. The rotary motor 35 drives the screen to rotate, thereby improving the drying efficiency of the material on the screen and the hot air.

[0025] The screen includes a first screen plate 221 and a second screen plate 222 arranged sequentially from top to bottom, and the aperture of the second screen plate 222 is smaller than the aperture of the first screen plate 221. The first screen plate 221 and the second screen plate 222 separate materials of different particle sizes, reduce the agglomeration of materials, and speed up the drying process.

[0026] Working process:

[0027] The external fresh air is introduced into the external heater 44 through the induced draft fan 45 for heating, and then filtered into the bottom barrel 4 for secondary heating through the internal heater 42. The hot air after secondary heating enters the air outlet pipe group 31, and after the air flow distribution through the air outlet pipe group 31, it enters the barrel 21 from different positions and angles through the air flow diverter plate 24 and the air vent 23; and the anthocyanin extract falls onto the first sieve disk 221 and the second sieve disk 222 according to the particle size in the barrel 21, and the first sieve disk 221 and the second sieve disk 222 are driven to rotate by the rotating motor 35, so that the anthocyanin extract is fully in contact with the hot air introduced at different positions and angles in the barrel 21, thereby achieving the effect of rapid drying.

[0028] The parts not described in detail in the present invention are prior art and thus will not be described in detail here.

Claims

1. A fluidized bed dryer for extracting stabilized anthocyanins, comprising an upper cylinder (1), a middle cylinder (2), a lower cylinder (3) and a bottom cylinder (4), characterized in that: A barrel (21) is arranged inside the middle barrel (2), a heating channel is arranged between the middle barrel (2) and the barrel (21), a vent hole (23) is arranged on the side of the barrel (21), an air flow splitter (24) is arranged at the bottom of the barrel (21), a plurality of first inclined nozzles (25) and second inclined nozzles (26) are arranged on the air flow splitter (24), and the first inclined nozzles (25) and the second inclined nozzles (26) are arranged at complementary angles; an air outlet pipe group (31) is arranged inside the lower barrel (3), an air inlet end of the air outlet pipe group (31) is connected to an air inlet assembly (41), and an air outlet end of the air outlet pipe group (31) is connected to the middle barrel (2).

2. The fluidized bed dryer for extracting stabilized anthocyanins according to claim 1, characterized in that: The first inclined nozzle (25) and the second inclined nozzle (26) are arranged adjacent to each other in a staggered manner, and the nozzle diameter of the first inclined nozzle (25) is larger than the nozzle diameter of the second inclined nozzle (26).

3. The fluidized bed dryer for extracting stabilized anthocyanins according to claim 1, characterized in that: The air intake assembly (41) comprises an internal heater (42) located in the bottom cylinder (4); one end of the internal heater (42) is connected to the air outlet pipe group (31) via a pipeline; the other end of the internal heater (42) is connected to a filter (43), an external heater (44) and an induced draft fan (45) in sequence via the pipeline.

4. The fluidized bed dryer for extracting stabilized anthocyanins according to claim 1, characterized in that: The air outlet pipe group (31) comprises a hollow positioning plate (32) connected to the air inlet assembly (41), a plurality of annularly distributed airflow pipes (33) are provided on the positioning plate (32), and air outlet holes (34) are provided on the side walls and tops of the airflow pipes (33).

5. The fluidized bed dryer for extracting stabilized anthocyanins according to claim 1, characterized in that: The barrel (21) is rotatably connected with a screen inside, a rotary motor (35) is provided on the positioning plate (32), a connecting rod is provided on the output shaft of the rotary motor (35), and the connecting rod passes through the air flow splitter plate (24) and is fixedly connected with the screen.

6. The fluidized bed dryer for extracting stabilized anthocyanins according to claim 5, characterized in that: The sieve comprises a first sieve plate (221) and a second sieve plate (222) which are arranged in sequence from top to bottom, and the aperture of the second sieve plate (222) is smaller than the aperture of the first sieve plate (221).

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