Waste heat recovery device of spray dryer

Abstract

The utility model discloses a waste heat recovery device of a spray dryer, which comprises a box body, a gas storage box arranged at the upper end of the box body, a gas inlet pipe arranged at one end of the gas storage box far away from the box body and communicated with the gas storage box, a pressure sensor component arranged at the lower end of the gas storage box, and a guide pipe arranged between the gas storage box and the box body, a filtering assembly slidably connected with the guide pipe penetrates through the upper end of the guide pipe, sliding rails are slidably connected to the upper end and the lower end of the guide pipe, and brushes matched with the filtering assembly are arranged at the ends, away from each other, of the two sliding rails; the pressure sensor assembly comprises an outer pipe penetrating through the gas storage tank, an inner pipe is slidably connected into the outer pipe, a second contact piece is arranged on the inner bottom wall of the outer pipe, and a first contact piece is fixedly connected to the inner wall of the inner pipe. A pressure sensor assembly is arranged at the lower end of the air storage box, when the filter plate is blocked, the pressure difference in the air storage box is increased, a first contact piece makes contact with a second contact piece, and therefore an alarm is triggered to remind a worker to replace the filter plate in time, and normal operation of the spray dryer is ensured.

Description

Technical Field

[0001] This utility model relates to the field of spray dryers, and more specifically, to a waste heat recovery device for spray dryers. Background Technology

[0002] A spray dryer is a device that can simultaneously perform drying and granulation. The pressure, flow rate, and nozzle size of the feed pump can be adjusted according to process requirements. The liquid material is sprayed into a mist using atomizing nozzles, allowing it to contact hot air and be dried to obtain the desired spherical particles of a specific size ratio.

[0003] Spray dryers are generally equipped with an exhaust pipe at the tail end to discharge the hot air after use. Since the hot air still contains residual heat, the exhaust pipe is usually connected to a waste heat recovery device to achieve energy saving and environmental protection. Because the hot air contains atomized fine particles, the waste heat recovery device is equipped with a filter screen to filter the fine particles. However, after long-term use, the fine particles will clog the filter screen mesh, resulting in poor exhaust and affecting the normal operation of the spray dryer. Utility Model Content

[0004] The purpose of this utility model is to provide a waste heat recovery device for a spray dryer. A pressure sensor assembly is installed at the lower end of the air storage tank. When the filter plate becomes clogged, the pressure difference inside the air storage tank increases, causing the first contact plate and the second contact plate to come into contact, thereby triggering an alarm to remind the staff to replace the filter plate in time and ensure the normal operation of the spray dryer.

[0005] The present invention adopts the following technical solution.

[0006] A waste heat recovery device for a spray dryer includes a housing, an air storage tank at the upper end of the housing, an air inlet pipe communicating with the end of the air storage tank away from the housing, a pressure sensor assembly at the lower end of the air storage tank, a conduit between the air storage tank and the housing, a filter assembly slidably connected to the upper end of the conduit, slide rails slidably connected to both the upper and lower ends of the conduit, and brushes adapted to the filter assembly at the ends of the two slide rails away from each other.

[0007] The pressure sensor assembly includes an outer tube that runs through the gas storage tank, an inner tube that is slidably connected inside the outer tube, a second contact piece that is provided on the bottom wall of the outer tube, a first contact piece that is fixedly connected to the inner wall of the inner tube, and a compression spring that is fixedly connected between the first contact piece and the second contact piece.

[0008] Furthermore, a limiting groove is provided on the inner wall of the outer tube, and a limiting block that is fixedly connected to the inner tube is slidably connected to the inner wall of the limiting groove.

[0009] Furthermore, a second vent hole is provided at the outer end of the outer tube, and a first vent hole adapted to the second vent hole is provided at the outer end of the inner tube.

[0010] Furthermore, the filter assembly includes two filter plates arranged vertically, with a positioning groove on the outer end of the upper filter plate.

[0011] Furthermore, a positioning component adapted to the filter assembly is provided at the outer end of the conduit. The positioning component includes a side plate fixedly connected to the conduit, a positioning block is provided on the side of the side plate near the filter assembly, and a connecting spring is provided between the positioning block and the side plate.

[0012] Furthermore, a crossbar is slidably connected to the outer end of the side plate, and the end of the crossbar near the filter assembly is fixedly connected to the positioning block.

[0013] The beneficial effects of this utility model are:

[0014] A pressure sensor assembly is installed at the lower end of the air tank. When the filter plate becomes clogged, the pressure difference inside the air tank increases, causing the first and second contact plates to come into contact, thereby triggering an alarm to remind staff to replace the filter plate in time and ensure the normal operation of the spray dryer. Attached Figure Description

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the gas storage tank in this utility model;

[0017] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0018] Figure 4 This is a schematic diagram of the pressure sensor assembly in this utility model;

[0019] Figure 5 This is a schematic diagram of the internal structure of the pressure sensor assembly in this utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the filter assembly in this utility model;

[0021] Figure 7 This is a schematic diagram of the positioning component in this utility model.

[0022] Description of the numbers in the figure:

[0023] 1. Housing; 2. Air inlet pipe; 3. Air storage tank; 4. Pressure sensor assembly; 5. Conduit; 6. Outer pipe; 7. Inner pipe; 8. Limiting groove; 9. Limiting block; 10. First vent; 11. Second vent; 12. First contact piece; 13. Second contact piece; 14. Compression spring; 15. Slide rail; 16. Brush; 17. Filter assembly; 18. Positioning groove; 19. Side plate; 20. Positioning block; 21. Connecting spring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Example 1

[0028] Please see Figure 1-7 A waste heat recovery device for a spray dryer includes a housing 1, an air storage tank 3 at the upper end of the housing 1, an air inlet pipe 2 communicating with the end of the air storage tank 3 away from the housing 1, a pressure sensor assembly 4 at the lower end of the air storage tank 3, a conduit 5 between the air storage tank 3 and the housing 1, a filter assembly 17 slidably connected to the upper end of the conduit 5, slide rails 15 slidably connected to both the upper and lower ends of the conduit 5, and brushes 16 adapted to the filter assembly 17 at the ends of the two slide rails 15 away from each other.

[0029] Please see Figure 5 The pressure sensor assembly 4 includes an outer tube 6 that passes through the gas storage tank 3. An inner tube 7 is slidably connected inside the outer tube 6. Both the outer tube 6 and the inner tube 7 are cylindrical, open at the top and solid at the bottom. A second contact piece 13 is provided on the inner bottom wall of the outer tube 6. A first contact piece 12 is fixedly connected to the inner wall of the inner tube 7. A compression spring 14 is fixedly connected between the first contact piece 12 and the second contact piece 13. A buzzer is provided at the outer end of the housing 1 and is electrically connected to the first contact piece 12 and the second contact piece 13. When the first contact piece 12 contacts the second contact piece 13, the first contact piece 12, the second contact piece 13 and the buzzer form a closed loop, and the buzzer sounds an alarm.

[0030] Please see Figure 6 The filter assembly 17 includes two filter plates arranged vertically. The outer end of the upper filter plate is provided with a positioning groove 18. The outer end of the conduit 5 is provided with a positioning component adapted to the filter assembly 17. The positioning component includes a side plate 19 fixedly connected to the conduit 5. A positioning block 20 is provided on the side of the side plate 19 near the filter assembly 17. A connecting spring 21 is provided between the positioning block 20 and the side plate 19. The filter plates are set to two so that the user can easily replace them. At the same time, the user can use a brush 16 to clean the particles on the surface of the replaced filter plate so that it can be used again next time.

[0031] Please see Figure 7 A crossbar is slidably connected to the outer end of the side plate 19. The end of the crossbar near the filter assembly 17 is fixedly connected to the positioning block 20. The crossbar can improve the stability of the positioning block 20. When the filter plate at the upper end of the filter assembly 17 is replaced to the conduit 5, the positioning block 20 and the positioning groove 18 can cooperate to position the replaced filter plate, preventing it from resetting into the conduit 5 under the action of gravity and affecting the normal flow of gas.

[0032] Example 2

[0033] This utility model provides a waste heat recovery device for a spray dryer. Components identical or corresponding to those in Embodiment 1 are labeled with the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. Please refer to [link to relevant documentation]. Figure 5 A limiting groove 8 is provided on the inner wall of the outer tube 6. A limiting block 9, which is fixedly connected to the inner tube 7, is slidably connected to the inner wall of the limiting groove 8. The setting of the limiting groove 8 and the limiting block 9 can prevent the outer tube 6 from separating from the inner tube 7.

[0034] The outer tube 6 has a second vent hole 11 at its outer end, which is located at the outer end of the air storage box 3. The inner tube 7 has a first vent hole 10 at its outer end that matches the second vent hole 11. When the first contact piece 12 and the second contact piece 13 come into contact, the second vent hole 11 and the first vent hole 10 are also fully connected, thereby venting the gas trapped inside the air storage box 3 and preventing the pressure difference from increasing, which would cause the spray dryer to malfunction.

[0035] The working process of this utility model is as follows: Hot air discharged from the spray dryer enters the housing 1 through the filter plate inside the air storage tank 3 and the conduit 5, realizing the recycling of hot air. When the filter plate becomes blocked, the gas discharged into the air storage tank 3 will remain inside the air storage tank 3, increasing the pressure difference inside the air storage tank 3. This will cause the first contact piece 12 to move downward and contact the second contact piece 13, thereby triggering an alarm to remind the staff to replace the filter plate in time. After receiving the alarm, the user moves the filter assembly 17 to replace the blocked filter plate from the conduit 5. The user can clean the replaced filter plate by repeatedly pulling the brush 16 for continued use. At the same time, when the second contact piece 13 contacts the first contact piece 12, the first vent 10 and the second vent 11 are connected, allowing the gas trapped inside the air storage tank 3 to be discharged in time, preventing the pressure difference from increasing further and causing the spray dryer to malfunction.

[0036] 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 waste heat recovery device for a spray dryer, comprising a housing (1), characterized in that: An air storage tank (3) is provided at the upper end of the housing (1). An air inlet pipe (2) is provided at the end of the air storage tank (3) away from the housing (1). A pressure sensor assembly (4) is provided at the lower end of the air storage tank (3). A conduit (5) is provided between the air storage tank (3) and the housing (1). A filter assembly (17) is slidably connected to the upper end of the conduit (5). Slide rails (15) are slidably connected at both the upper and lower ends of the conduit (5). A brush (16) adapted to the filter assembly (17) is provided at the ends of the two slide rails (15) away from each other. The pressure sensor assembly (4) includes an outer tube (6) that passes through the gas storage tank (3), an inner tube (7) that is slidably connected inside the outer tube (6), a second contact piece (13) that is provided on the bottom wall of the outer tube (6), a first contact piece (12) that is fixedly connected to the inner wall of the inner tube (7), and a compression spring (14) that is fixedly connected between the first contact piece (12) and the second contact piece (13).

2. The waste heat recovery device for a spray dryer according to claim 1, characterized in that: The inner wall of the outer tube (6) is provided with a limiting groove (8), and the inner wall of the limiting groove (8) is slidably connected with a limiting block (9) that is fixedly connected to the inner tube (7).

3. The waste heat recovery device for a spray dryer according to claim 1, characterized in that: The outer tube (6) has a second vent hole (11) at its outer end, and the inner tube (7) has a first vent hole (10) at its outer end that is compatible with the second vent hole (11).

4. The waste heat recovery device for a spray dryer according to claim 1, characterized in that: The filter assembly (17) includes two filter plates arranged vertically, with a positioning groove (18) on the outer end of the upper filter plate.

5. The waste heat recovery device for a spray dryer according to claim 1, characterized in that: The outer end of the conduit (5) is provided with a positioning component adapted to the filter assembly (17). The positioning component includes a side plate (19) fixedly connected to the conduit (5). A positioning block (20) is provided on the side of the side plate (19) near the filter assembly (17). A connecting spring (21) is provided between the positioning block (20) and the side plate (19).

6. The waste heat recovery device for a spray dryer according to claim 5, characterized in that: The side plate (19) has a horizontal bar that is slidably connected to it at its outer end. The end of the horizontal bar near the filter assembly (17) is fixedly connected to the positioning block (20).

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