CN213965191U

CN213965191U - Spray drying device

Info

Publication number: CN213965191U
Application number: CN202022883663.6U
Authority: CN
Inventors: 王选朋; 李俊杰; 朱少华; 李金川
Original assignee: Wuhan Nanostar Technology Co ltd
Current assignee: Wuhan Nanostar Technology Co ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-08-17
Anticipated expiration: 2030-12-04

Abstract

The utility model relates to the technical field of centrifugal drying devices, in particular to a spray drying device, which comprises a drying tank, a feeding device, a hot air blower and a first air guide pipe; a centrifugal atomizing disc is arranged at the top in the drying tank cavity, and the feeding device is communicated with the centrifugal atomizing disc; the first air guide pipe is arranged around the inner cavity of the drying tank, a plurality of first spray heads are arranged on the first air guide pipe, and the plurality of first spray heads are arranged along the first air guide pipe; one end of the first air guide pipe extends out of the drying tank and is communicated with the hot air blower. When in use, the hot air blower is started to preheat. The first air guide pipe is arranged in the drying tank, so that heat loss can be prevented. After the drying tank is preheated, the feeding device is started, the material is fed into the drying tank by the feeding device and is sprayed out by the centrifugal atomizing disk in a high-speed rotating mode, and the material is atomized into fine mist-shaped liquid drops. The spray head sprays hot air in the horizontal direction, so that transverse acting force can be added to the liquid drops, the drying speed is increased, and the descending time is delayed.

Description

Spray drying device

Technical Field

The utility model relates to a centrifugal drying device technical field specifically is a spray drying device.

Background

Spray drying is the most widely used process in the liquid process shaping and drying industries. Most suitable for the production of powdery, granular solid products from liquid raw materials in solution, emulsion, suspension and paste form. Centrifugal spray drying is that air is filtered and heated, and then enters an air distributor at the top of a dryer, and the heated air enters a drying chamber uniformly in a spiral shape. The feed liquid is sprayed into fine foggy liquid beads by a high-speed centrifugal atomizer at the top of the tower body in a rotating way, and the fine foggy liquid beads are in parallel flow contact with hot air and can be dried into finished products in a short time. After the common centrifugal spray drying device atomizes, materials flow downwards through hot air too fast, are easy to be collected when drying is not completed, and the drying tank is too long, so that the cost is increased, and the drying tank is not practical.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

In order to solve the problems, the utility model provides a spray drying device which can reduce the speed of material descending.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: a spray drying device comprises a drying tank, a feeding device, a hot air blower and a first air guide pipe; a centrifugal atomizing disc is arranged at the top in the drying tank cavity, and the feeding device is communicated with the centrifugal atomizing disc; the first air guide pipe is arranged around the inner cavity of the drying tank, a plurality of first spray heads are arranged on the first air guide pipe, and the plurality of first spray heads are arranged along the first air guide pipe; one end of the first air guide pipe extends out of the drying tank and is communicated with the hot air blower.

Preferably, the spray drying device further comprises a cyclone separator and a return pipe, the cyclone separator is communicated with the side wall of the bottom of the drying tank, and an air outlet of the cyclone separator is communicated with the top of the drying tank through the return pipe.

Preferably, the bottom of the drying tank and the bottom of the cyclone separator are both provided with discharge valves.

Preferably, the plurality of first nozzles are arranged in a vortex-like arrangement.

Preferably, the spray drying device further comprises a second air guide pipe, the second air guide pipe is arranged below the first air guide pipe and surrounds the inner cavity of the drying tank, a plurality of second spray heads are arranged on the second air guide pipe, and the plurality of second spray heads are arranged along the second air guide pipe and have upward elevation angles; one end of the second air guide pipe extends out of the drying tank and is communicated with the hot air blower.

Preferably, the hot air blower is provided with an air filter.

Preferably, the first air guide pipe and the second air guide pipe are provided with flow regulating valves at ends extending out of the drying tank.

Preferably, the feeding device comprises a feed box, a feed pump and a feed pipe; the feed box is communicated with a feed pump, and the feed pump is communicated with the centrifugal atomizing disk through a feed pipe.

Preferably, a stirrer is arranged in the bin.

(III) advantageous effects

The utility model provides a spray drying device possesses following beneficial effect: when the hot air blower is used, the hot air blower is started firstly, so that hot air enters the drying tank through the first air guide pipe and the spray head to be preheated. The first air guide pipe is arranged in the drying tank, so that heat loss can be prevented. After the drying tank is preheated, the feeding device is started, the material is fed into the drying tank by the feeding device, is sprayed out by the centrifugal atomizing disk in a high-speed rotating mode, is atomized into fine mist-shaped liquid drops, and the liquid drops are in contact with high-temperature gas in the drying tank to be dried. The plurality of nozzles are arranged on the first air guide pipe at equal intervals, so that the heat distribution in the drying tank can be balanced; the spray head sprays hot air in the horizontal direction, so that transverse acting force can be added to the liquid drops, the drying speed is increased, and the descending time is delayed.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description, do not constitute a limitation of the invention, in which:

fig. 1 shows a schematic structural diagram of an embodiment of the present invention;

fig. 2 shows a schematic structural view of a first air guiding duct in an embodiment of the present invention;

fig. 3 shows a first schematic structural diagram of a second air guiding duct according to an embodiment of the present invention;

fig. 4 shows a second schematic structural diagram of the second air guiding pipe in the embodiment of the present invention.

In the figure: the device comprises a drying tank 1, a centrifugal atomizing disk 11, a feeding device 2, a feed box 21, a stirrer 211, a feeding pump 22, a feeding pipe 23, a hot air blower 3, an air filter 31, a first air guide pipe 4, a first spray head 41, a second air guide pipe 5, a second spray head 51, a flow regulating valve 6, a cyclone separator 7, a return pipe 71, a discharge valve 8 and a conveying belt 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 4, an embodiment of the present invention provides a spray drying device, which includes a drying tank 1, a feeding device 2, an air heater 3, and a first air guiding pipe 4; a centrifugal atomizing disc 11 is arranged at the top in the cavity of the drying tank 1, and the feeding device 2 is communicated with the centrifugal atomizing disc 11; the first air guide pipe 4 is arranged around the inner cavity of the drying tank 1, a plurality of first nozzles 41 are arranged on the first air guide pipe 4, and the plurality of first nozzles 41 are arranged along the first air guide pipe 4; one end of the first air duct 4 extends out of the drying tank 1 and is communicated with the hot air blower 3.

According to the scheme, when the hot air blower is used, the hot air blower 3 is started firstly, so that hot air enters the drying tank 1 through the first air guide pipe 4 and the spray head to be preheated. The first air guide pipe 4 is arranged in the drying tank 1, so that heat loss can be prevented. After the drying tank 1 is preheated, the feeding device 2 is started, the material is fed into the drying tank 1 by the feeding device 2, is sprayed out by the centrifugal atomizing disk 11 in a high-speed rotating mode, is atomized into fine mist-shaped liquid drops, and the liquid drops are contacted with high-temperature gas in the drying tank 1 to be dried. The plurality of nozzles are arranged on the first air guide pipe 4 at equal intervals, so that heat distribution in the drying tank 1 can be balanced; the spray head sprays hot air in the horizontal direction, so that transverse acting force can be added to the liquid drops, the drying speed is increased, and the descending time is delayed.

Further, the spray drying device also comprises a cyclone separator 7 and a return pipe 71, wherein the cyclone separator 7 is communicated with the side wall of the bottom of the drying tank 1, and the air outlet of the cyclone separator 7 is communicated with the top of the drying tank 1 through the return pipe 71.

The cyclone separator 7 can separate the finally needed powdery dry material from the dried material in a gas-solid mixing state, and the gas flowing out from the gas outlet still has a certain temperature and is mixed with a small amount of powder, so that the part of gas is connected into the drying tank 1 again, the heat utilization rate can be improved, the material conversion rate can be improved, and the waste is reduced.

Further, the bottom of the drying tank 1 and the bottom of the cyclone separator 7 are both provided with a discharge valve 8.

The discharge valve 8 is arranged, so that the outflow of dry material powder can be conveniently controlled. A conveyer belt 9 can be arranged below the drying tank 1 and the cyclone separator 7 so as to continuously convey the dry powder of the materials.

Further, the plurality of first nozzles 41 are arranged in a swirl arrangement. The swirl shape arranged in the first spray heads 41 is consistent with the rotation direction of the material sprayed by the centrifugal atomizing disk 11, so that the material is accelerated again, and the drying speed of the material is increased.

Further, the spray drying device also comprises a second air guide pipe 5, the second air guide pipe 5 is arranged below the first air guide pipe 4 and arranged around the inner cavity of the drying tank 1, a plurality of second spray heads 51 are arranged on the second air guide pipe 5, and the plurality of second spray heads 51 are arranged along the second air guide pipe 5 and have upward elevation angles; one end of the second air duct 5 extends out of the drying tank 1 and is communicated with the hot air blower 3.

Specifically, the first air guide pipe 4 is arranged at the upper part of the drying tank 1, and the second air guide pipe 5 is arranged at the lower part of the drying tank 1, so that the heat distribution in the drying tank 1 is uniform. The second nozzle 51 blows hot air upwards to further slow down the descending speed of the material liquid drops.

Further, an air filter 31 is provided on the hot air blower 3. The air filter 31 is additionally arranged, so that hot air blown into the drying tank 1 can be kept clean, and the pollution to materials is avoided.

Furthermore, flow regulating valves 6 are arranged at the ends of the first air guide pipe 4 and the second air guide pipe 5 extending out of the drying tank 1. The flow rate of the high-temperature gas in the first air guiding pipe 4 and the second air guiding pipe 5 can be adjusted by the flow rate adjusting valve 6.

Further, the feeding device 2 comprises a material box 21, a feeding pump 22 and a feeding pipe 23; the feed box 21 is communicated with a feed pump 22, and the feed pump 22 is communicated with the centrifugal atomizing disk 11 through a feed pipe 23.

Further, a stirrer 211 is provided in the hopper 21.

Specifically, the stirrer 211 is added to uniformly mix the solution or suspension in the hopper 21 to prevent the adhesion. When the centrifugal atomizing disc is used, the stirrer 211 is started firstly, and after materials are uniformly mixed, the feeding pump 22 is started to pump the materials to the centrifugal atomizing disc 11 for atomization.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A spray drying device is characterized by comprising a drying tank (1), a feeding device (2), a hot air blower (3) and a first air guide pipe (4); a centrifugal atomizing disc (11) is arranged at the top in the cavity of the drying tank (1), and the feeding device (2) is communicated with the centrifugal atomizing disc (11); the first air guide pipe (4) is arranged around the inner cavity of the drying tank (1), a plurality of first spray heads (41) are arranged on the first air guide pipe (4), and the first spray heads (41) are arranged along the first air guide pipe (4); one end of the first air guide pipe (4) extends out of the drying tank (1) and is communicated with the hot air blower (3).

2. A spray drying device according to claim 1, further comprising a cyclone separator (7) and a return pipe (71), wherein the cyclone separator (7) is communicated with the bottom side wall of the drying tank (1), and the air outlet of the cyclone separator (7) is communicated with the top of the drying tank (1) through the return pipe (71).

3. A spray drying device according to claim 2, characterized in that the drying vessel (1) and the bottom of the cyclone (7) are provided with a discharge valve (8).

4. A spray drying device according to claim 1, wherein a plurality of said first nozzles (41) are arranged in a swirl arrangement.

5. The spray drying device according to claim 1, further comprising a second air duct (5), wherein the second air duct (5) is disposed below the first air duct (4) and surrounds the inner cavity of the drying tank (1), a plurality of second spray heads (51) are disposed on the second air duct (5), and the plurality of second spray heads (51) are arranged along the second air duct (5) and have an upward elevation angle; one end of the second air guide pipe (5) extends out of the drying tank (1) and is communicated with the hot air blower (3).

6. A spray drying device according to claim 1, characterized in that the hot air blower (3) is provided with an air filter (31).

7. A spray drying device according to claim 5, characterised in that the ends of the first (4) and second (5) ducts which extend out of the drying tank (1) are each provided with a flow control valve (6).

8. A spray drying device according to claim 1, characterized in that the feed device (2) comprises a feed tank (21), a feed pump (22) and a feed pipe (23); the feed box (21) is communicated with the feed pump (22), and the feed pump (22) is communicated with the centrifugal atomizing disk (11) through the feed pipe (23).

9. A spray drying device according to claim 8, characterised in that an agitator (211) is arranged in the tank (21).