A preheated spray drier

Abstract

The utility model discloses a preheating type spray drier, drying tower, one side of drying tower is provided with the material liquid tank for conveying atomized material liquid, and the bottom both ends of drying tower are fixed with air outlet channel and water storage tank respectively, the material liquid tank in -line fixed has the waste heat circulation pipe, the both sides of water storage tank top end surface are fixed with steam output pipe and reflux tube respectively, preheat tower, preheat tower's top is fixed with the air inlet pipe that communicates with drying tower top portion, and preheat tower fixed has a plurality of heating pipe, wherein the sidewall bottom end of preheat tower is integrally formed with air inlet channel, one end of heating pipe is connected with steam output pipe, when preheating type spray drier, the material liquid after temperature rise is atomized and is transported to drying tower with the heated air, makes the material liquid rapid evaporation and realizes solid -liquid separation, and the material liquid after atomization promotes and contacts with hot air fully, and the waste heat of steam preliminarily heats the material liquid, improves the temperature and evaporation efficiency of material liquid.

Description

Technical Field

[0001] This utility model relates to the field of spray dryer technology, specifically a preheating spray dryer. Background Technology

[0002] A dust-free closed-loop spray dryer is a device that can simultaneously complete drying and granulation. The pressure, flow rate, and nozzle size of the feed pump can be adjusted according to process requirements to obtain spherical particles of a specific size ratio. The spray dryer is a type of continuous atmospheric pressure dryer. Special equipment sprays liquid material into a mist, allowing it to contact hot air and be dried. After evaporation, the solids in the liquid material are extracted as a powder.

[0003] Currently, because the heater heats the intake air with steam and then discharges it directly, and the contact area between the steam circulation pipe and the air is small, the preheating effect of the air is poor, and there is a waste of residual heat in the discharged steam. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0005] In view of the problems existing in the above and / or existing preheated spray dryers, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a preheating spray dryer. In the preheating spray dryer, the heated liquid material is atomized and transported to the drying tower with heated air, so that the liquid material evaporates rapidly to achieve solid-liquid separation. The atomized liquid material is lifted and fully contacts the hot air. The residual heat of the steam initially heats the liquid material, thereby improving the temperature of the liquid material and the evaporation efficiency.

[0007] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0008] A preheating spray dryer, comprising:

[0009] A drying tower is provided with a liquid tank for conveying atomized liquid on one side, and an air outlet channel and a water storage tank are fixed at both ends of the bottom of the drying tower, respectively. A waste heat circulation pipe is embedded in the liquid tank, and a steam output pipe and a return pipe are fixed on both sides of the top surface of the water storage tank, respectively.

[0010] The preheating tower has an air inlet pipe fixed at its top, which is connected to the top of the drying tower. Multiple heating pipes are fixed inside the preheating tower. An air inlet channel is integrally formed at the bottom of the side wall of the preheating tower. One end of each heating pipe is connected to a steam output pipe, and the other end of each heating pipe is fixed to a waste heat recovery pipe connected to a waste heat circulation pipe.

[0011] In a preferred embodiment of the preheating spray dryer described in this utility model, an atomizing spray plate is embedded and fixedly mounted on the air inlet pipe at the top of the drying tower, a plurality of nozzles are fixedly installed at the bottom of the atomizing spray plate, and a liquid pipe is fixedly mounted at the top of the atomizing spray plate.

[0012] In a preferred embodiment of the preheating spray dryer described in this utility model, a liquid tank is embedded in the bottom end of the liquid pipe, and a water pump connected to the liquid pipe is installed at the bottom end of the liquid tank.

[0013] In a preferred embodiment of the preheating spray dryer described in this utility model, an inlet pipe is fixedly installed at the top of both the liquid tank and the water storage tank, and a control valve is fixedly installed on both inlet pipes.

[0014] In a preferred embodiment of the preheating spray dryer described in this utility model, a powerful fan is embedded in the air inlet channel, and a dustproof net is fixedly installed on the side wall of the air inlet channel.

[0015] In a preferred embodiment of the preheating spray dryer described in this utility model, a storage chamber is provided at the bottom of the drying tower, and a dustproof bag is provided on the side wall of the air outlet channel.

[0016] In a preferred embodiment of the preheating spray dryer described in this utility model, heat-conducting plates are equidistantly embedded in the top of the preheating tower, and multiple heating tubes are fixedly inserted into the heat-conducting plates.

[0017] In a preferred embodiment of the preheating spray dryer described in this utility model, a heater is embedded in the bottom of the water storage tank, and both ends of the heater are electrically connected to power supply wires.

[0018] In a preferred embodiment of the preheating spray dryer described in this utility model, the top end of the waste heat circulation pipe extends out of the liquid tank and is connected to a return pipe, the return pipe is connected to a water storage tank, and a one-way valve is fixedly installed on the return pipe.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting a preheating tower on one side of the drying tower, the steam in the water storage tank heats the input air through the heating pipe and heat conduction plate. The used steam heats the liquid material in the waste heat circulation box. After the heated liquid material is atomized, it is transported to the drying tower along with the heated air. The atomized liquid material is lifted and fully contacts the hot air. The waste heat of the steam initially heats the liquid material, thereby improving the temperature of the liquid material and the evaporation efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0021] Figure 1 This is a schematic diagram of the overall structure of a preheating spray dryer according to the present invention;

[0022] Figure 2 This is a schematic diagram of the preheating spray dryer of this utility model from another angle;

[0023] Figure 3 This is a schematic diagram of the internal structure of the preheating tower of a preheating spray dryer according to the present invention;

[0024] Figure 4 This is a schematic diagram of the internal structure of the liquid tank of a preheating spray dryer according to the present invention;

[0025] Figure 5 This is a schematic diagram of the water storage tank structure of a preheating spray dryer according to this utility model.

[0026] In the diagram: 1. Drying tower; 2. Feed pipe; 3. Atomizing spray plate; 4. Air inlet pipe; 5. Preheating tower; 6. Heating pipe; 7. Steam output pipe; 8. Water storage tank; 9. Air inlet channel; 10. Powerful fan; 11. Dustproof net; 12. Air outlet channel; 13. Dustproof bag; 14. Waste heat recovery pipe; 15. Heat conducting plate; 16. Liquid inlet pipe; 17. Waste heat circulation pipe; 18. Water pump; 19. One-way valve; 20. Heater; 21. Return pipe; 22. Feed tank. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0030] Figures 1-5 The diagram shown is an overall structural schematic of one embodiment of a preheating spray dryer according to this utility model. Please refer to [link / reference]. Figures 1-5 A preheating spray dryer according to this embodiment includes:

[0031] A drying tower 1 is provided with a liquid tank 22 for conveying atomized liquid on one side of the drying tower 1, and an air outlet channel 12 and a water storage tank 8 are fixed at both ends of the bottom of the drying tower 1, respectively. A waste heat circulation pipe 17 is embedded in the liquid tank 22, and a steam output pipe 7 and a return pipe 21 are fixed on both sides of the top surface of the water storage tank 8, respectively.

[0032] The preheating tower 5 has an air inlet pipe 4 fixed at its top, which is connected to the top of the drying tower 1. Multiple heating pipes 6 are fixed in the preheating tower 5. An air inlet channel 9 is integrally formed at the bottom of the side wall of the preheating tower 5. One end of the heating pipe 6 is connected to the steam output pipe 7, and the other end of the heating pipe 6 is fixed to a waste heat recovery pipe 14 connected to the waste heat circulation pipe 17.

[0033] In this embodiment, an atomizing spray plate 3 is embedded and fixed at the top of the drying tower 1 and sleeved on the air inlet pipe 4. Multiple nozzles are fixedly installed at the bottom of the atomizing spray plate 3, and a liquid pipe 2 is fixed at the top of the atomizing spray plate 3. A liquid tank 22 is embedded at the bottom of the liquid pipe 2. A water pump 18 connected to the liquid pipe 2 is installed at the bottom of the liquid tank 22. After the water pump 18 is started, the liquid is sprayed out along the liquid pipe 2 and the nozzles at the bottom of the atomizing spray plate 3.

[0034] In this embodiment, inlet pipes 16 are fixedly installed at the top of both the liquid tank 22 and the water storage tank 8. Control valves are fixedly installed on both inlet pipes 16. U-shaped fastening frames are fitted at both ends of the liquid tank 22. Bolts with threads inserted into the drying tower 1 are installed at both ends of the fastening frames. After opening the control valve of the inlet pipe 16, drying liquid and evaporation water can be added to the liquid tank 22 and the water storage tank 8 respectively.

[0035] In this embodiment, a powerful fan 10 is embedded in the air inlet channel 9, and a dustproof net 11 is fixedly installed on the side wall of the air inlet channel 9. Heat-conducting plates 15 are embedded at equal intervals at the top of the preheating tower 5. Multiple heating tubes 6 are fixedly inserted into the heat-conducting plates 15. The heating tubes 6 and the heat-conducting plates 15 are welded together. The heating tubes 6 and the heat-conducting plates 15 are preferably made of aluminum tubes with good thermal conductivity, so that the heat of the heating tubes 6 can be effectively transferred to the surface of the heat-conducting plates 15. After the powerful fan 10 is started, the external air is filtered by the dustproof net 11 and transported to the drying tower 1 along the preheating tower 5 and the air inlet channel 4. During the process of the air flowing between the heating tubes 6 and the multiple heat-conducting plates 15, heat conduction is achieved, and the temperature of the air is raised to 80-120 degrees.

[0036] In this embodiment, a storage chamber is provided at the bottom of the drying tower 1, and a dustproof bag 13 is provided on the side wall of the air outlet channel 12. After the water in the liquid evaporates, it is discharged from the air outlet channel 12, and the solid matter in the liquid forms powder and falls to the bottom of the drying tower 1. The dustproof bag 13 can block the solid matter in the liquid. The dustproof bag 13 is bonded and fixed to the side wall of the air outlet channel 12. A heater 20 is embedded in the bottom of the water storage tank 8. Both ends of the heater 20 are electrically connected to power supply wires. The heater 20 is an electric heater used to heat the water in the water storage tank 8.

[0037] In this embodiment, the top end of the waste heat circulation pipe 17 extends out of the liquid tank 22 and is connected to the return pipe 21. The return pipe 21 is connected to the water storage tank 8, and a one-way valve 19 is fixedly installed on the return pipe 21. The steam after the waste heat is utilized is condensed into a water vapor mixture. Under the influence of the airflow, it flows back to the water storage tank 8 along the return pipe 21. The remaining stable water vapor mixture is easier to heat and evaporate. The one-way valve 19 can prevent the steam in the water storage tank 8 from being transported to the return pipe 21.

[0038] Combination Figures 1-5The specific operation process of a preheating spray dryer in this embodiment is as follows: The heater 20 in the water storage tank 8 heats the water, and then the steam in the water storage tank 8 is transported to the heating pipe 6. The powerful fan 10 is started so that the ambient air first passes through the primary filter to remove most of the dust and solid matter. The air enters the preheating tower 5. The heating pipe 6 and the heat-conducting plate 15 heat the input air. The steam used in the heating pipe 6 is used to heat the liquid material in the waste heat circulation pipe 17 through the waste heat recovery pipe 14. The heated liquid material is atomized and transported to the drying tower 1 along with the heated air. The liquid material to be dried is transported to the drying tower 1 through the nozzle at the bottom of the atomizing spray plate 3 by the water pump 18 and the liquid material pipe 2. The atomizing spray plate 3 disperses the liquid material into countless extremely fine droplets, which greatly increases its surface area, so that the liquid material evaporates quickly and achieves solid-liquid separation. The atomized liquid material is lifted and fully contacts the hot air. The high-temperature drying air enters from the top of the tower and fully mixes and contacts the droplets. Within a very short time (several seconds to tens of seconds), the water in the droplets is rapidly evaporated, and the solids in the liquid form a powdery structure. The residual heat of the steam initially raises the temperature of the liquid, increasing its temperature and evaporation efficiency. The liquid is a liquid mixture containing solid components. It serves as the "raw material" for producing final powdered products, which include food (dairy products, condiments, instant powders), pharmaceuticals (active pharmaceutical ingredients, dried powders of traditional Chinese medicine extracts, health products, and excipients), and the chemical industry (detergents, dyes, and catalysts, etc.).

[0039] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A preheating spray dryer, characterized in that, include: A drying tower (1) is provided on one side of which is a liquid tank (22) for conveying atomized liquid. An air outlet channel (12) and a water storage tank (8) are fixed at both ends of the bottom of the drying tower (1). A waste heat circulation pipe (17) is embedded in the liquid tank (22). A steam output pipe (7) and a return pipe (21) are fixed on both sides of the top surface of the water storage tank (8). The preheating tower (5) has an air inlet pipe (4) fixed at its top, which is connected to the top of the drying tower (1). The preheating tower (5) has multiple heating pipes (6) fixed inside. The bottom of the side wall of the preheating tower (5) has an integrally formed air inlet channel (9). One end of the heating pipe (6) is connected to the steam output pipe (7), and the other end of the heating pipe (6) is fixed to a waste heat recovery pipe (14) connected to the waste heat circulation pipe (17).

2. The preheating spray dryer according to claim 1, characterized in that, The top of the drying tower (1) is embedded with an atomizing spray plate (3) sleeved on the air inlet pipe (4). Multiple nozzles are fixedly installed at the bottom of the atomizing spray plate (3), and a liquid pipe (2) is fixed at the top of the atomizing spray plate (3).

3. A preheating spray dryer according to claim 2, characterized in that, The bottom end of the liquid pipe (2) is embedded in the liquid tank (22), and a water pump (18) connected to the liquid pipe (2) is installed in the liquid tank (22).

4. A preheating spray dryer according to claim 3, characterized in that, The top of both the liquid tank (22) and the water tank (8) are fixedly equipped with inlet pipes (16), and control valves are fixedly installed on both inlet pipes (16).

5. A preheating spray dryer according to claim 1, characterized in that, A powerful fan (10) is embedded in the air inlet channel (9), and a dustproof net (11) is fixedly installed on the side wall of the air inlet channel (9).

6. A preheating spray dryer according to claim 1, characterized in that, The bottom of the drying tower (1) is provided with a storage cavity, and the side wall of the air outlet channel (12) is provided with a dustproof bag (13).

7. A preheating spray dryer according to claim 1, characterized in that, The top of the preheating tower (5) is equidistantly fitted with heat-conducting plates (15), and multiple heating tubes (6) are fixedly inserted into the heat-conducting plates (15).

8. A preheating spray dryer according to claim 1, characterized in that, A heater (20) is embedded in the bottom of the water storage tank (8), and both ends of the heater (20) are electrically connected to power supply wires.

9. A preheating spray dryer according to claim 1, characterized in that, The top end of the waste heat circulation pipe (17) extends out of the liquid tank (22) and is connected to the return pipe (21). The return pipe (21) is connected to the water storage tank (8), and a one-way valve (19) is fixedly installed on the return pipe (21).

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