Spray dryer

Abstract

The spray dryer comprises a tower body, a hot air supply mechanism and an air blowing mechanism, an air distribution cavity is formed in the tower wall of the tower body, a tangential air outlet communicated with the air distribution cavity is formed in the inner wall of the tower body, and the hot air supply mechanism provides hot air for the air distribution cavity. The air blowing mechanism comprises an air outlet nozzle arranged in the tangential air outlet, a speed increasing pipeline communicated with the air outlet nozzle and an electromagnetic control valve which is communicated with the speed increasing pipeline and located in the air distribution cavity. Hot air is generated through the hot air generator, the hot air is fed into the air distribution cavity through the air injection pipeline by means of the fan, air is fed through the electromagnetic control valve, the hot air is sprayed out from the air outlet nozzle after being accelerated through the speed increasing pipeline, and the hot air is sent out from the tangential air outlet, so that rotating airflow can be formed in the tower body, and drying is more uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of drying equipment, in particular to a spray dryer. Background Art

[0002] A spray drying tower is a device used for drying biological pesticides, medicines, and food microorganisms. It can spray materials in a solution state into the spray drying tower, and the materials are discharged in a solid powder state after drying. Since the drying process is completed instantaneously, the particles of the finished product can basically maintain an approximate spherical shape of the droplets. The product has good dispersibility, fluidity, and solubility, and is suitable for drying heat-sensitive materials.

[0003] After retrieval, the utility model disclosed in the application number 202020860296.5 provides a spray drying tower, which includes a tower body. An atomizing nozzle is arranged at the top of the tower body, and a blanking port is arranged at the bottom of the tower body. A plurality of air jet nozzles are arranged on the side wall of the tower body, and the air jet nozzles are arranged in a spiral shape. The air jet nozzle is provided with an air jet orifice, and the air jet direction of the air jet orifice is tangent to the side wall of the tower body, and the air jet directions of all the air jet orifices are set to spiral upward. Although this application can blow off the materials attached to the side wall of the tower body, because its air jet nozzle protrudes and blocks the rotation of the materials, on the contrary, the materials will adhere to the back of the air jet nozzle, making it more inconvenient to clean. Summary of the Utility Model

[0004] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract of the specification and the title of the utility model of this application, to avoid obscuring the purpose of this part, the abstract of the specification, and the title of the utility model. However, such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the above and / or problems existing in the use of the spray dryer, the present utility model is proposed.

[0006] Therefore, the purpose of the present utility model is to provide a spray dryer. The raw materials are introduced through an atomizing nozzle, the dried materials are collected through a collecting hopper and discharged from the discharge port. Hot air is generated by a hot air generator, and the hot air is sent into a gas distribution chamber through an air injection pipe by a fan. The hot air enters through an electromagnetic control valve, and after being accelerated through an acceleration pipe, it is ejected from an air outlet nozzle. Since the hot air is sent out from the tangential air outlet, a rotating air flow can be formed inside the tower body, increasing the contact between the material spray and the hot air, and making the drying more uniform.

[0007] To solve the above technical problems, according to one aspect of the present utility model, the following technical solutions are provided:

[0008] A spray dryer, which includes:

[0009] A tower body, inside the tower wall of which there is an air distribution chamber, and on the inner wall of the tower body there is a tangential air outlet communicating with the air distribution chamber;

[0010] A hot air supply mechanism, which supplies hot air to the air distribution chamber;

[0011] A blowing mechanism, which includes an air outlet nozzle arranged inside the tangential air outlet, an accelerating pipeline communicating with the air outlet nozzle, and an electromagnetic control valve communicating with the accelerating pipeline and located inside the air distribution chamber.

[0012] As a preferred solution of a spray dryer according to the present utility model, wherein, on the side wall of the top tower cover of the tower body there is an atomizing nozzle, and at the bottom of the tower body there is an aggregate hopper and a discharge port.

[0013] As a preferred solution of a spray dryer according to the present utility model, wherein, the hot air supply mechanism includes a hot air generator and a blower for extracting the hot air of the hot air generator.

[0014] As a preferred solution of a spray dryer according to the present utility model, wherein, at the air outlet of the blower there is a heat preservation pipeline, on the side wall of the tower body there is an air injection pipe communicating with the air distribution chamber, at the inlet of the air injection pipe there is a connector, and the outlet of the heat preservation pipeline is communicated with the connector.

[0015] As a preferred solution of a spray dryer according to the present utility model, wherein, on the outer wall of the air outlet nozzle there is an elastic pad, and the elastic pad is closely attached to the inner wall of the tangential air outlet.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows: for this kind of spray dryer, raw materials are introduced through the atomizing nozzle, the dried materials are collected by the aggregate hopper and discharged from the discharge port, hot air is generated by the hot air generator, the blower is used to send the hot air into the air distribution chamber through the air injection pipeline, air intake is carried out through the electromagnetic control valve, and after being accelerated by the accelerating pipeline, the hot air is sprayed out from the air outlet nozzle. Since the hot air is sent out from the tangential air outlet, a swirling air flow can be formed inside the tower body, increasing the contact between the material spray and the hot air, and making the drying more uniform. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the present utility model will be described in detail below in conjunction with the drawings and detailed embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings. Among them:

[0018] Figure 1This is a schematic diagram of the overall structure of a spray dryer of the present utility model;

[0019] Figure 2 This is a schematic diagram of a partial structure of the air blowing mechanism of a spray dryer of the present utility model;

[0020] Figure 3 This is a schematic diagram of a partial sectional structure of a spray dryer of the present utility model.

[0021] 100, tower body; 101, air distribution chamber; 110, atomizing nozzle; 120, collecting hopper; 130, discharge port; 140, injection pipe; 141, joint; 200, hot air supply mechanism; 210, hot air generator; 220, fan; 221, heat preservation pipe; 300, air blowing mechanism; 310, air outlet nozzle; 320, speed increasing pipe; 330, electromagnetic control valve. Specific embodiments

[0022] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0023] Secondly, the present utility model is described in detail in conjunction with the schematic diagrams. When detailing the embodiments of the present utility model, for the convenience of description, the cross-sectional views showing the device structure will not be enlarged locally in general proportion, and the schematic diagrams are only examples, which should not limit the protection scope of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width and depth should be included.

[0024] In order to make the purpose, technical solution and advantages of the present utility model clearer, the embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] The present utility model provides a spray dryer. The raw materials are introduced through an atomizing nozzle, the dried materials are collected through a collecting hopper and discharged from the discharge port. Hot air is generated by a hot air generator, and the hot air is sent into the air distribution chamber through an injection pipe by a fan. The hot air enters through an electromagnetic control valve, and after being accelerated through a speed increasing pipe, the hot air is sprayed out from the air outlet nozzle. Since the hot air is sent out from the tangential air outlet, a rotating air flow can be formed inside the tower body, increasing the contact between the material spray and the hot air, and making the drying more uniform.

[0026] Figures 1 - 3 Shown is a schematic diagram of the structure of an embodiment of a spray dryer of the present utility model. Please refer to Figures 1 - 3 , A spray dryer of this embodiment, its main part includes a tower body 100, a hot air supply mechanism 200 and an air blowing mechanism 300.

[0027] The tower body 100 supplies gas to the gas outlet nozzles 310 in the gas outlet through the gas distribution chamber 101, feeds raw materials through the atomizing nozzles 110, collects the dried materials through the collecting hopper 120, and discharges them from the discharge port 130. Specifically, a gas distribution chamber 101 is arranged inside the tower wall of the tower body 100, a tangential gas outlet communicating with the gas distribution chamber 101 is arranged on the inner wall of the tower body 100, atomizing nozzles 110 are arranged on the side wall of the top cover of the tower body 100, and a collecting hopper 120 and a discharge port 130 are arranged at the bottom of the tower body 100;

[0028] The hot air supply mechanism 200 generates hot air through the hot air generator 210, and uses the fan 220 to send the hot air into the gas distribution chamber 101 through the injection pipe 140. Specifically, the hot air supply mechanism 200 supplies hot air to the gas distribution chamber 101. In this embodiment, the hot air supply mechanism 200 includes a hot air generator 210 and a fan 220 that extracts the hot air of the hot air generator 210. In this embodiment, a heat preservation pipe 221 is arranged at the air outlet of the fan 220, a gas injection pipe 140 communicating with the gas distribution chamber 101 is arranged on the side wall of the tower body 100, a joint 141 is arranged at the inlet of the gas injection pipe 140, and the outlet of the heat preservation pipe 221 is communicated with the joint 141;

[0029] The air blowing mechanism 300 intakes air through the electromagnetic control valve 330, and after accelerating through the accelerating pipe 320, hot air is sprayed out from the air outlet nozzle 310. Since the hot air is sent out from the tangential air outlet, a rotating air flow can be formed inside the tower body 100, increasing the contact between the material spray and the hot air, and making the drying more uniform. Specifically, the air blowing mechanism 300 includes an air outlet nozzle 310 arranged inside the tangential air outlet, an accelerating pipe 320 communicated with the air outlet nozzle 310, and an electromagnetic control valve 330 communicated with the accelerating pipe 320 and located inside the gas distribution chamber 101. In this embodiment, an elastic pad is arranged on the outer wall of the air outlet nozzle 310, and the elastic pad is closely attached to the inner wall of the tangential air outlet.

[0030] Combined Figures 1 - 3 In this embodiment, a spray dryer operates as follows: raw materials are fed through the atomizing nozzles 110, the dried materials are collected through the collecting hopper 120 and discharged from the discharge port 130. Hot air is generated by the hot air generator 210, and the fan 220 is used to send the hot air into the gas distribution chamber 101 through the injection pipe 140. Air is intaken through the electromagnetic control valve 330, and after accelerating through the accelerating pipe 320, hot air is sprayed out from the air outlet nozzle 310. Since the hot air is sent out from the tangential air outlet, a rotating air flow can be formed inside the tower body 100, increasing the contact between the material spray and the hot air, and making the drying more uniform.

[0031] Although the present utility model has been described above with reference to the embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present utility model. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed by the present utility model can be combined with each other in any way, and the exhaustive description of these combinations is not given in this specification only for the consideration of saving space and resources. Therefore, the present utility model is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A spray dryer, characterized in that: include: A tower body (100), wherein a gas separation chamber (101) is arranged inside a tower wall of the tower body (100), and a tangential gas outlet communicating with the gas separation chamber (101) is arranged on an inner wall of the tower body (100); A hot air supply mechanism (200), wherein the hot air supply mechanism (200) provides hot air to the air separation chamber (101); The blowing mechanism (300) comprises an air outlet nozzle (310) arranged inside the tangential air outlet, a speed-increasing pipe (320) connected to the air outlet nozzle (310), and an electromagnetic control valve (330) connected to the speed-increasing pipe (320) and located inside the air distribution chamber (101).

2. A spray dryer according to claim 1, characterized in that: The top tower cover side wall of the tower body (100) is provided with an atomizing nozzle (110), and the bottom of the tower body (100) is provided with a collecting hopper (120) and a discharge port (130).

3. A spray dryer according to claim 2, characterized in that: The hot air supply mechanism (200) comprises a hot air generator (210) and a fan (220) for extracting hot air from the hot air generator (210).

4. A spray dryer according to claim 3, characterized in that: The air outlet of the fan (220) is provided with a heat-insulating pipe (221), the side wall of the tower body (100) is provided with an air injection pipe (140) connected to the air separation chamber (101), the inlet of the air injection pipe (140) is provided with a joint (141), and the outlet of the heat-insulating pipe (221) is connected to the joint (141).

5. A spray dryer according to claim 4, characterized in that: The outer wall of the air outlet nozzle (310) is provided with an elastic pad, which is in close contact with the inner wall of the tangential air outlet.

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