Centrifugal spray drier with heat recovery

Abstract

The utility model discloses a centrifugal spray drier with heat energy recovery, including spray drier main part, the top of spray drier main part is equipped with hot -blast machine and feeding mechanism, the outside of spray drier main part is equipped with cyclone separator, the input of cyclone separator is connected with the output of spray drier main part, the output of cyclone separator is equipped with heat energy recovery mechanism, heat energy recovery mechanism includes heat -preserving shell and heat exchange fin, heat -preserving shell fixed mounting to the outside of spray drier main part. The utility model discloses a heat energy recovery mechanism is set up, makes hot exhaust gas and inlet air realize isolated convection, utilizes heat exchange fin to realize heat recovery, and utilizes the setting drain pipe, cooperates S -shaped bend and mechanical control valve cooperation to realize the device has the advantages such as high -efficient recovery to exhaust heat energy, reduces energy consumption, and the convenient discharge of condensate water, will not pollute the inlet air.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal spray dryer technology, and more specifically, to a centrifugal spray dryer with heat recovery. Background Technology

[0002] Centrifugal spray dryers are widely used in liquid processing and drying industries. They are primarily used to produce powdered or granular solid products from raw materials such as solutions, emulsions, and suspensions. The liquid material is atomized by a centrifugal atomizer, and upon contact with hot air, the moisture evaporates rapidly, achieving drying. The finished product is discharged from the bottom of the drying tower, while exhaust gas is discharged by a fan. However, in order to improve drying efficiency, it is necessary to continuously introduce dry hot air while expelling hot air with high humidity. When expelling hot air, heat energy is also taken away, so heat needs to be continuously replenished, resulting in high energy consumption. Furthermore, when recovering heat energy, the moisture in the expelled hot air due to the temperature difference condenses into water droplets, which are difficult to remove. Utility Model Content

[0003] In view of the problems existing in the prior art, the purpose of this utility model is to provide a centrifugal spray dryer with heat energy recovery to solve the problems in the background technology.

[0004] To achieve the above objectives, the present invention adopts the following technical solution; A centrifugal spray dryer with heat recovery includes a spray dryer body, a hot air blower and a feeding mechanism installed on the top of the spray dryer body, a cyclone separator installed on the outside of the spray dryer body, the input end of the cyclone separator being connected to the output end of the spray dryer body, and a heat recovery mechanism provided at the output end of the cyclone separator. The heat recovery mechanism includes an insulation shell and heat exchange fins. The insulation shell is fixedly installed on the outside of the spray dryer body, and the heat exchange fins are fixedly installed inside the insulation shell, dividing the interior into an exhaust area and an inlet area. The exhaust end of the cyclone separator is connected to the exhaust area through a pipe, and the inlet area is fixedly connected to the input end of the hot air blower.

[0005] As a further description of the above technical solution: an exhaust vent is provided on the right side of the top of the insulation shell, and the exhaust vent is connected to the exhaust area.

[0006] As a further description of the above technical solution: the bottom of the insulation shell is provided with a drain pipe, and the bottom end of the drain pipe is provided with an S-shaped bend.

[0007] As a further description of the above technical solution: a mechanical control valve is provided on the outer side of the drainage end of the S-shaped bend.

[0008] As a further description of the above technical solution: the feeding mechanism includes a metering pump and a connecting pipe. The metering pump is fixedly installed on the top of the spray dryer body. The input end of the metering pump is connected to the raw material storage device to be dried through the connecting pipe. The output end of the metering pump is connected to the centrifugal structure inside the spray dryer body through a pipe.

[0009] As a further description of the above technical solution: a diversion pipe is fixedly installed inside the exhaust area, and the diversion pipe is used to evenly distribute the high-temperature exhaust airflow into each gap of the exhaust area.

[0010] Compared with existing technologies, the advantages of this utility model are: (1) This scheme sets up a heat energy recovery mechanism to achieve isolation and convection between the hot exhaust gas and the intake gas, and uses heat exchange fins to achieve heat recovery, thereby realizing the advantages of the device in efficiently recovering exhaust heat energy and reducing energy consumption. (2) By setting up a drain pipe, in conjunction with an S-shaped bend and a mechanical control valve, this scheme enables the device to conveniently discharge condensate without polluting the intake air. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial top view cross-sectional structural diagram of the present invention; Figure 3 This is a partial side view sectional structural diagram of the present invention; Figure 4 This is a top view cross-sectional diagram of the diversion pipe of this utility model.

[0012] Explanation of the labels in the diagram: 1. Spray dryer main body; 2. Hot air blower; 3. Feeding mechanism; 31. Metering pump; 32. Connecting pipe; 4. Cyclone separator; 5. Heat recovery mechanism; 51. Insulation shell; 511. Exhaust vent; 512. Drain pipe; 513. S-shaped bend; 514. Mechanical control valve; 52. Heat exchange fins; 53. Exhaust area; 531. Diverter pipe; 54. Air inlet area. Detailed Implementation

[0013] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0014] To address the issue that current centrifugal spray dryers require a continuous flow of dry hot air while simultaneously expelling hot air with high humidity, and that the expelled hot air also carries away heat energy, necessitating a constant replenishment of heat and resulting in high energy consumption, Example 1 is proposed: Please seeFigures 1-4 In this embodiment, a centrifugal spray dryer with heat recovery includes a spray dryer body 1, a hot air blower 2 and a feeding mechanism 3 installed on the top of the spray dryer body 1, a cyclone separator 4 installed on the outside of the spray dryer body 1, the input end of the cyclone separator 4 is connected to the output end of the spray dryer body 1, and a heat recovery mechanism 5 is provided at the output end of the cyclone separator 4. The heat recovery mechanism 5 includes an insulation shell 51 and heat exchange fins 52. The insulation shell 51 is fixedly installed on the outside of the spray dryer body 1. The heat exchange fins 52 are fixedly installed inside the insulation shell 51 and divide the interior into an exhaust area 53 and an air inlet area 54. The exhaust end of the cyclone separator 4 is connected to the exhaust area 53 through a pipe. The air inlet area 54 is connected and fixedly connected to the input end of the hot air blower 2. An exhaust port 511 is provided on the right side of the top of the insulation shell 51, and the exhaust port 511 is connected to the exhaust area 53.

[0015] The feeding mechanism 3 includes a metering pump 31 and a connecting pipe 32. The metering pump 31 is fixedly installed on the top of the spray dryer body 1. The input end of the metering pump 31 is connected to the raw material storage device to be dried through the connecting pipe 32. The output end of the metering pump 31 is connected to the centrifugal structure inside the spray dryer body 1 through a pipe. A diversion pipe 531 is fixedly installed inside the exhaust area 53. The diversion pipe 531 is used to evenly distribute the high-temperature exhaust airflow into each gap of the exhaust area 53.

[0016] In this embodiment, the liquid raw material is drawn into the spray dryer body 1 by starting the metering pump 31 and connecting pipe 32 for atomization and centrifugation. At the same time, the hot air blower 2 is started to inject hot air into the spray dryer body 1 to achieve drying. The dried and formed particles are discharged from the bottom and enter the cyclone separator 4 by wind. The particles are separated by the cyclone separator 4 and discharged from the bottom. The high-temperature exhaust gas enters the exhaust port 511 of the exhaust area 53 of the heat energy recovery mechanism 5 and is discharged. At the same time, when the hot air blower 2 is started, the drawn air enters through the air inlet area 54 and is heated. The cold air and the hot exhaust gas achieve independent convection through the heat exchange fins 52 to achieve heat energy exchange. The recovered heat energy increases the intake air temperature and reduces the power consumption of the hot air blower 2. Thus, the device has the advantages of efficient recovery of exhaust heat energy and reduced energy consumption.

[0017] Please see Figure 1 The bottom of the insulation shell 51 is provided with a drain pipe 512, and the bottom end of the drain pipe 512 is provided with an S-shaped bend 513; a mechanical control valve 514 is provided on the outside of the drain end of the S-shaped bend 513.

[0018] In this embodiment, by setting a drain pipe 512 at the bottom of the insulation shell 51, the water droplets condensed when the sweat inside the exhaust area 53 is cooled by the exhaust gas are smoothly discharged and flow into the S-shaped bend 513. The drainage is controlled by a mechanical control valve 514, thereby achieving the advantage of convenient discharge of condensate without polluting the intake air.

[0019] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A centrifugal spray dryer with heat recovery, comprising a spray dryer body (1), characterized in that: A hot air blower (2) and a feeding mechanism (3) are installed on the top of the spray dryer body (1). A cyclone separator (4) is installed on the outside of the spray dryer body (1). The input end of the cyclone separator (4) is connected to the output end of the spray dryer body (1). A heat recovery mechanism (5) is provided at the output end of the cyclone separator (4). The heat recovery mechanism (5) includes an insulation shell (51) and heat exchange fins (52). The insulation shell (51) is fixedly installed on the outside of the spray dryer body (1). The heat exchange fins (52) are fixedly installed inside the insulation shell (51) and divide the interior into an exhaust area (53) and an air inlet area (54). The exhaust end of the cyclone separator (4) is connected to the exhaust area (53) through a pipe. The air inlet area (54) is connected and fixedly connected to the input end of the hot air blower (2).

2. A centrifugal spray dryer with heat recovery according to claim 1, characterized in that: The right side of the top of the insulation shell (51) is provided with an exhaust vent (511), which is connected to the exhaust area (53).

3. A centrifugal spray dryer with heat recovery according to claim 1, characterized in that: The bottom of the insulation shell (51) is provided with a drain pipe (512), and the bottom end of the drain pipe (512) is provided with an S-shaped bend (513).

4. A centrifugal spray dryer with heat recovery according to claim 3, characterized in that: A mechanical control valve (514) is provided on the outer side of the drainage end of the S-shaped bend (513).

5. A centrifugal spray dryer with heat recovery according to claim 1, characterized in that: The feeding mechanism (3) includes a metering pump (31) and a connecting pipe (32). The metering pump (31) is fixedly installed on the top of the spray dryer body (1). The input end of the metering pump (31) is connected to the raw material storage device to be dried through the connecting pipe (32). The output end of the metering pump (31) is connected to the centrifugal structure inside the spray dryer body (1) through a pipe.

6. A centrifugal spray dryer with heat recovery according to claim 1, characterized in that: A diversion pipe (531) is fixedly installed inside the exhaust area (53), and the diversion pipe (531) is used to evenly distribute the high-temperature exhaust airflow into each gap of the exhaust area (53).

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