Spray drying system in low-oxygen environment

Abstract

The utility model provides a spray drying system in a low-oxygen environment, which comprises a drying tower, a spray drying device and a spray drying device, the wheel disc is arranged above the discharge hole of the drying tower; the rotating blades are uniformly arranged between the wheel discs at intervals; wherein the rotating blades are rotationally connected with the rotating shaft, and the rotating shaft is connected with the wheel disc through a plurality of connecting rods in different directions. By the adoption of the technical scheme, under the action of rotation of the rotating blades, hot nitrogen and to-be-dried milk powder are fully mixed and make contact, the drying process is completed, the efficient and high-quality milk powder drying effect is achieved, the nitrogen preheating module conveys nitrogen to create a low-oxygen environment, oxidation of dairy products in the drying process can be reduced, and the milk powder drying effect is improved. And the color and nutritional ingredients are maintained.

Description

Technical Field

[0001] This application relates to the technical field of spray drying in a low-oxygen environment, and particularly relates to a spray drying system for a low-oxygen environment. Background Art

[0002] Currently, traditional spray drying systems are generally applicable to the drying of materials under conventional environmental conditions. However, in some special fields, such as the milk powder preparation industry, there are strict control requirements for the oxygen content during the milk powder drying process, because too high an oxygen content may cause oxidation reactions of the milk powder during drying, thereby affecting the quality and safety of the product. Therefore, it is particularly important to develop a system that can efficiently and safely perform material spray drying in a low-oxygen environment.

[0003] Although there are already some drying equipment in the market for low-oxygen environments, most of these equipment have complex structures, high energy consumption, and it is difficult to ensure the stability of the low-oxygen environment during the drying process. In addition, traditional spray drying systems have deficiencies in material mixing and nitrogen flow, resulting in low drying efficiency, easy caking of materials, or problems of uneven drying. Summary of the Utility Model

[0004] The purpose of this application is to provide a spray drying system for a low-oxygen environment, which can further increase the contact area and heat transfer efficiency between preheated nitrogen and materials in a low-oxygen environment, achieving the effects of simple structure, low energy consumption, high drying efficiency, and good stability, and the created low-oxygen environment can reduce the oxidation of materials to be dried during the drying process and maintain the color and nutritional components.

[0005] To achieve the above purpose, this application provides a spray drying system for a low-oxygen environment, including: a drying tower, with a drying tower discharge port provided at the bottom of the drying tower; a turntable provided above the drying tower discharge port; a plurality of rotating blades evenly spaced between the turntables; wherein, the rotating blades are rotationally connected to a rotating shaft, and the rotating shaft is connected to the turntable through a plurality of connecting rods in different orientations.

[0006] Among them, the drying tower is used for heat exchange between the materials to be dried and preheated nitrogen, and a drying tower discharge port is provided at the bottom of the drying tower to collect the dried finished products.

[0007] To achieve the continuous supply of materials to be dried, as an option of the spray drying system for a low-oxygen environment in this application, the spray drying system for a low-oxygen environment further includes: a storage tank, wherein a storage tank discharge port provided on one side of the storage tank is connected to the feed port at the top of the drying tower through a pipeline.

[0008] To improve the drying efficiency of the system and reduce the oxygen content in the drying tower, creating a low-oxygen environment for the system. As an option for the low-oxygen environment spray drying system of the present application, the low-oxygen environment spray drying system further includes: a nitrogen preheating module, wherein the outlet of the nitrogen preheating module is connected to the inlet at the top of the drying tower through a pipeline.

[0009] To monitor the oxygen concentration in the drying tower in real time and ensure that the system always operates in a low-oxygen environment. As an option for the low-oxygen environment spray drying system of the present application, the low-oxygen environment spray drying system further includes: an oxygen detector, wherein the oxygen detector is arranged at the top of the drying tower.

[0010] To increase the contact area between the material and the hot nitrogen and improve the drying effect. As an option for the low-oxygen environment spray drying system of the present application, the low-oxygen environment spray drying system further includes: a spraying module, wherein the spraying module is connected to the feed inlet and is arranged inside the drying tower.

[0011] To further improve the flexibility of the system. As an option for the low-oxygen environment spray drying system of the present application, the turntable is flange-connected to the inner wall of the drying tower.

[0012] The beneficial effects of the present application are as follows:

[0013] The low-oxygen environment spray drying system provided by the technical solution of the present application includes: a drying tower, which serves as the main working place of the system, is used to carry the material to be dried and conduct heat exchange between the hot nitrogen and the material to be dried. A drying tower discharge port is arranged at the bottom of the drying tower for collecting the dried finished material; and a turntable arranged above the drying tower discharge port and several rotating blades evenly spaced between the turntables. After the nitrogen preheating module transports the preheated nitrogen into the drying tower, it can further increase the contact area and heat transfer efficiency between the preheated nitrogen and the material to be dried in a low-oxygen environment, achieving the effects of simple structure, low energy consumption, high drying efficiency, and good stability. Moreover, the created low-oxygen environment can reduce the oxidation of the milk powder to be dried during the drying process and maintain the color and nutritional components. Among them, the rotating blade is rotationally connected to the rotating shaft, and the rotating shaft is connected to the turntable through several connecting rods in different orientations, enabling the preheated nitrogen to be fully mixed and contacted with the milk powder to complete the drying process and achieving the effect of drying the milk powder efficiently and with high quality. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of a low-oxygen environment spray drying system;

[0015] Figure 2 It is Figure 1 The specific structural diagram at position a in

[0016] Description of the reference numerals:

[0017] 100, Turntable;

[0018] 200, Rotating blade;

[0019] 300, Rotating shaft;

[0020] 400, Connecting rod;

[0021] 500, Drying tower; 501, Outlet of the drying tower; 502, Inlet; 503, Inlet for air;

[0022] 600, Storage tank; 601, Outlet of the storage tank

[0023] 700, Nitrogen preheating module; 701, Outlet for gas;

[0024] 800, Oxygen detector;

[0025] 900, Spraying module. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0028] Referring to "embodiment" herein means that a specific feature, structure or characteristic described in conjunction with the embodiment may be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0029] The inventors of this application have proposed a low-oxygen environment spray drying system. Referring to Figure 1 - Figure 2 , Figure 1The structural schematic diagram of a spray drying system in a low-oxygen environment provided by an embodiment of the present application. Figure 2 Provided by an embodiment of the present application Figure 1 The specific structural schematic diagram at position a in

[0030] Referring to Figure 1 - Figure 2 , the spray drying system in a low-oxygen environment provided by the present application includes: a plurality of rotating blades 200 evenly spaced between the turntables 100; wherein, the rotating blades 200 are rotatably connected to the rotating shaft 300, and the rotating shaft 300 is connected to the turntable 100 through a plurality of connecting rods 400 in different orientations. The plurality of rotating blades 200 support and connect the rotating shaft 300 and the turntable 100 in multiple orientations by the connecting rods 400, ensuring the stability of the system and the smoothness of rotation. Through this design, the efficiency of mixing and flowing between the preheated nitrogen and the milk powder to be dried is improved, so as to achieve the effect of drying the milk powder efficiently and with high quality.

[0031] Continuing to refer to Figure 1 - Figure 2 , as the main working place of the system, the spray drying system in a low-oxygen environment further includes: a drying tower 500, which is used to carry the milk powder to be dried and conduct heat exchange between the preheated nitrogen and the milk powder to be dried. Among them, a drying tower discharge port 501 is provided at the bottom of the drying tower 500, and the drying tower discharge port 501 is used to collect the dried finished milk powder.

[0032] Continuing to refer to Figure 1 - Figure 2 , the spray drying system in a low-oxygen environment further includes: a storage tank 600, which is used to store the milk powder to be dried. Among them, a storage tank discharge port 601 provided on one side of the storage tank 600 is connected to the feed port 502 at the top of the drying tower 500 through a pipeline to realize the continuous supply of the milk powder to be dried, so as to improve the stability and drying efficiency of the system.

[0033] Continuing to refer to Figure 1 - Figure 2 , the spray drying system in a low-oxygen environment further includes: a nitrogen preheating module 700, which is used to preheat the nitrogen entering the drying tower 500 to improve the drying efficiency. Among them, the gas outlet 701 of the nitrogen preheating module 700 is connected to the gas inlet 503 at the top of the drying tower 500 through a pipeline. The preheated nitrogen enters the gas inlet 503 at the top of the drying tower 500 through the gas outlet 701, so as to fully contact the milk powder to be dried conveyed into the drying tower 500. It can further increase the contact area and heat transfer efficiency between the preheated nitrogen and the milk powder in a low-oxygen environment, achieving the effects of simple structure, low energy consumption, high drying efficiency and good stability. And creating a low-oxygen environment can reduce the oxidation of dairy products during the drying process and maintain the color and nutritional components.

[0034] Continue to refer to Figure 1 - Figure 2 , the low-oxygen environment spray drying system further includes: an oxygen detector 800, which is used to monitor the oxygen concentration in the drying tower 500 in real time to ensure that the system always operates in a low-oxygen environment. Further, when the oxygen concentration in the drying tower 500 is too high, the staff can reduce the oxygen concentration in the drying tower 500 in a timely manner. Among them, the oxygen detector 800 is arranged on the top of the drying tower 500.

[0035] Continue to refer to Figure 1 - Figure 2 , the low-oxygen environment spray drying system further includes: a spraying module 900. Among them, the spraying module 900 is connected to the feed inlet 502 and is placed inside the drying tower 500. The spraying module 900 sprays the milk powder to be dried transported into the drying tower 500 through the feed inlet 502 into the drying tower 500 in a spray form evenly, further increasing the contact area between the preheated nitrogen and the milk powder to be dried and improving the drying effect.

[0036] Continue to refer to Figure 1 - Figure 2 , the turntable 100 is flange-connected to the inner wall of the drying tower 500. This connection method has the advantages of simple structure, good sealing performance, easy installation and disassembly, etc., ensuring the stability and safety of the rotating blade 200 during rotation, and at the same time facilitating the cleaning and maintenance of the inside of the drying tower.

[0037] In the description of the embodiments of the present application, the technical term "several" refers to two or more (including two). The orientation or positional relationship indicated by technical terms such as "one side", "top end", "bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present application.

[0038] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "set", "provided with", "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low oxygen environment spray drying system, characterized in that: include: A drying tower (500), wherein a drying tower discharge port (501) is provided at the bottom of the drying tower (500); A wheel disc (100) disposed above the drying tower discharge port (501); A plurality of rotating blades (200) are evenly spaced and arranged between the wheel discs (100); The rotating blade (200) is rotatably connected to a rotating shaft (300), and the rotating shaft (300) is connected to the wheel disc (100) via a plurality of connecting rods (400) in different orientations.

2. The low oxygen environment spray drying system according to claim 1, characterized in that: The low oxygen environment spray drying system further comprises: a storage tank (600), wherein a storage tank discharge port (601) arranged on one side of the storage tank (600) is connected to a feed port (502) at the top of the drying tower (500) through a pipeline.

3. The low oxygen environment spray drying system according to claim 1, characterized in that: The low oxygen environment spray drying system further comprises: a nitrogen preheating module (700), wherein an air outlet (701) of the nitrogen preheating module (700) is connected to an air inlet (503) at the top of the drying tower (500) via a pipeline.

4. The low oxygen environment spray drying system according to claim 1, characterized in that: The low oxygen environment spray drying system further comprises: an oxygen detector (800), wherein the oxygen detector (800) is arranged at the top of the drying tower (500).

5. The low oxygen environment spray drying system according to claim 2, characterized in that: The low oxygen environment spray drying system further comprises: a spray module (900), wherein the spray module (900) is connected to the feed port (502) and is placed inside the drying tower (500).

6. The low oxygen environment spray drying system according to claim 1, characterized in that: The wheel disc (100) is flange-connected to the inner wall of the drying tower (500).

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