A spray drying tower tail gas waste heat recycling closed loop circulating device

Abstract

The utility model belongs to tail gas waste heat recovery technical field, concretely is a kind of spray drying tower tail gas waste heat recycling closed circuit circulating device, including jar body, the jar body top is equipped with jar cover, the middle part of jar cover top surface is installed into gas pipe, jar cover top surface one side installs into liquid pipe, jar cover top surface other side installs into gas pipe, jar body bottom surface middle part installs first liquid outlet pipe, jar body bottom surface one side installs second liquid outlet pipe, jar cover bottom surface inner wall installs connecting pipe.The utility model has the advantages that the utility model is in cooperation with the cooperation of connecting pipe and gas hole, can make high-temperature tail gas evenly distribute in jar body inside, to make high-temperature tail gas fully and evenly contact with spiral cooling pipe, to improve cooling effect, and simultaneously by setting cleaning component, can clean the surface of spiral cooling pipe, to clean the sundries or crystallization on the outer wall of spiral cooling pipe, to ensure cooling effect.

Description

Technical Field

[0001] This utility model belongs to the field of exhaust gas waste heat recovery technology, specifically a closed-loop circulation device for waste heat recovery and utilization of exhaust gas from a spray drying tower. Background Technology

[0002] Spray drying towers are widely used in many industries such as food, chemical, and pharmaceutical. Their working principle involves atomizing liquid feed into droplets, which rapidly evaporate moisture upon contact with hot air, resulting in a dried product. During this process, a large amount of hot air participates in the drying operation, and the exhaust gas typically still carries a high temperature.

[0003] Currently, most spray drying tower systems have low efficiency in utilizing waste heat from exhaust gases. On the one hand, directly emitting high-temperature exhaust gases not only wastes a lot of energy and increases the production costs of enterprises, but also causes thermal pollution to the environment when the high-temperature exhaust gases are released into the atmosphere. In addition, some existing waste heat recovery devices have problems such as complex structure, low recovery efficiency, and difficulty in forming a closed loop, which cannot well meet the needs of energy conservation, emission reduction, and efficient production. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a closed-loop circulation device for recovering and utilizing waste heat from the exhaust gas of a spray drying tower.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: The waste heat recovery and utilization closed-loop circulation device for spray drying tower tail gas of this utility model includes a tank body. The top of the tank body is provided with a tank cover. An air inlet pipe is installed in the middle of the top surface of the tank cover. A liquid inlet pipe is installed on one side of the top surface of the tank cover. An air outlet pipe is installed on the other side of the top surface of the tank cover. A first liquid outlet pipe is installed in the middle of the bottom surface of the tank body. A second liquid outlet pipe is installed on one side of the bottom surface of the tank body. A connecting pipe is installed on the inner wall of the bottom surface of the tank cover. Several evenly distributed air outlet holes are opened on the connecting pipe. The air inlet pipe is located inside the connecting pipe. A spiral cooling pipe is provided inside the tank body. The top end of the spiral cooling pipe is fixedly connected to the air inlet pipe. The bottom end of the spiral cooling pipe is fixedly connected to the second liquid outlet pipe. A cleaning component is provided inside the spiral cooling pipe in the tank body.

[0006] Furthermore, the cleaning component includes:

[0007] The motor is fixedly mounted on one side of the tank. A first helical gear is installed on the inner end of the motor shaft. A lead screw is rotatably mounted on the inner wall of one side of the tank via a first fixed plate. A second helical gear is installed on the outer periphery of the top of the lead screw. The second helical gear meshes with the first helical gear. An annular plate is threaded onto the lead screw. Several brushes are evenly installed on the inner wall of the annular plate. The brushes contact and cooperate with the spiral cooling pipe. A limit component is installed on the annular plate.

[0008] Furthermore, the limiting component includes:

[0009] The limiting rod is connected to the inner wall of the tank through two upper and lower distributed second fixing plates. The limiting rod passes through the annular plate and can slide along the annular plate.

[0010] Furthermore, the brush is a soft, high-temperature resistant brush, and the brush is detachably connected to the annular plate.

[0011] Furthermore, a water collection trough is installed inside the tank, the water collection trough has a conical cross-section, and the top of the first liquid outlet pipe is located inside the water collection trough.

[0012] Furthermore, a guide plate is installed at the bottom of the intake pipe. The guide plate has an inverted trapezoidal cross-section and is located inside the connecting pipe and contacts and cooperates with the inner wall of the connecting pipe.

[0013] Furthermore, support legs are installed at the four corners of the bottom surface of the tank, and a support plate is installed on the bottom surface of each support leg. The bottom surface of each support plate is roughened.

[0014] Furthermore, control valves are installed on both the first liquid outlet pipe and the gas outlet pipe.

[0015] Furthermore, the can lid is detachably connected to the can body by fastening bolts, and a sealing gasket is installed on the inner wall of the can lid.

[0016] Compared with the existing technology, the beneficial effects of this utility model are:

[0017] 1. This utility model, through the cooperation of the connecting pipe and the air outlet, enables the high-temperature exhaust gas to be evenly distributed inside the tank, thereby allowing the high-temperature exhaust gas to fully and evenly contact the spiral cooling pipe, thus improving the cooling effect.

[0018] 2. This utility model, by setting up a cleaning component, can clean the surface of the spiral cooling pipe, thereby removing debris or crystals from the outer wall of the spiral cooling pipe, thus ensuring the cooling effect and facilitating the cooling of high-temperature exhaust gas.

[0019] 3. By setting up a water collection tank, the liquid generated during cooling can be collected and recycled, reducing resource waste and saving resources. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 yes Figure 1 A bottom view;

[0023] Figure 3 This is a schematic diagram of the internal structure of the tank;

[0024] Figure 4 This is a schematic diagram of a ring-shaped plate structure;

[0025] Figure 5 This is a schematic diagram of a spiral cooling pipe structure;

[0026] Figure 6 This is a schematic diagram of the connecting pipe structure;

[0027] Figure 7 This is a bottom view of the can lid;

[0028] The following are the labels shown in the diagram: 1. Tank body; 2. Tank cover; 3. Air inlet pipe; 4. Liquid inlet pipe; 5. Air outlet pipe; 6. First liquid outlet pipe; 7. Second liquid outlet pipe; 8. Connecting pipe; 9. Air outlet; 10. Spiral cooling pipe; 11. Motor; 12. First helical gear; 13. First fixing plate; 14. Lead screw; 15. Second helical gear; 16. Annular plate; 17. Brush; 18. Water collection tank; 19. Guide plate; 20. Support leg; 21. Support plate; 22. Control valve; 23. Fastening bolt; 24. Sealing gasket; 25. Limiting rod; 26. Second fixing plate. Detailed Implementation

[0029] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0030] like Figure 1-7 As shown, the closed-loop circulation device for waste heat recovery and utilization of spray drying tower exhaust gas of this utility model includes a tank body 1 with an opening on the top surface. A tank cover 2 is provided on the top of the tank body 1. An air inlet pipe 3 is installed in the middle of the top surface of the tank cover 2. A liquid inlet pipe 4 is installed on one side of the top surface of the tank cover 2. An air outlet pipe 5 is installed on the other side of the top surface of the tank cover 2. A first liquid outlet pipe 6 is installed in the middle of the bottom surface of the tank body 1. A second liquid outlet pipe 7 is installed on one side of the bottom surface of the tank body 1. A connecting pipe 8 is installed on the inner wall of the bottom surface of the tank cover 2. Several evenly distributed air outlet holes 9 are opened on the connecting pipe 8. The air inlet pipe 3 is located inside the connecting pipe 8. A spiral cooling pipe 10 is provided inside the tank body 1. The top end of the spiral cooling pipe 10 is fixedly connected to the air inlet pipe 3, and the bottom end of the spiral cooling pipe 10 is fixedly connected to the second liquid outlet pipe 7. The spiral cooling pipe 10 is located outside the connecting pipe 8. A cleaning component is provided inside the tank body 1.

[0031] In use: First, coolant is introduced into the spiral cooling pipe 10 through the inlet pipe 4. After passing through the spiral cooling pipe 10, it flows out through the second outlet pipe 7, forming a coolant circulation. Then, the high-temperature exhaust gas is introduced into the tank 1 through the air inlet pipe 3, which is tightly connected to the exhaust gas outlet of the spray drying tower. Then, it enters the connecting pipe 8 and is evenly distributed in the tank 1 through the air outlet 9. Then, it comes into full contact with the spiral cooling pipe 10, and heat exchange occurs, thereby cooling the high-temperature exhaust gas. The cooled gas is discharged through the air outlet pipe 5. After the coolant in the spiral cooling pipe 10 absorbs heat, it flows out through the second outlet pipe 7 and can enter the heat storage tank for heat storage. After the coolant undergoes heat exchange in the heat storage tank, it enters the inlet pipe 4 again, forming a coolant circulation.

[0032] When debris or crystals accumulate on the surface of the spiral cooling pipe 10, the cleaning component operates to clean the surface of the spiral cooling pipe 10, thereby ensuring the cleanliness of the surface of the spiral cooling pipe 10 and ensuring the cooling effect.

[0033] like Figure 1-3 As shown, the cleaning component includes:

[0034] A motor 11 is fixedly mounted on one side of the tank body 1. A first helical gear 12 is installed on the inner end of the motor 11's shaft. A lead screw 14 is rotatably mounted on the inner wall of one side of the tank body 1 via a first fixing plate 13. A second helical gear 15 is installed on the outer periphery of the top end of the lead screw 14, meshing with the first helical gear 12. An annular plate 16 is threaded onto the lead screw 14. Several brushes 17 are evenly installed on the inner wall of the annular plate 16, contacting and engaging with the spiral cooling pipe 10. A limit component is installed on the annular plate 16. When the motor 11 operates, it drives the first helical gear 12 to rotate. The rotation of the first helical gear 12 drives the second helical gear 15 to rotate, which in turn drives the lead screw 14 to rotate. The rotation of the lead screw 14 moves the annular plate 16, which in turn moves the brushes 17, thereby cleaning the surface of the spiral cooling pipe 10.

[0035] like Figure 3 The limiting component includes:

[0036] A limiting rod 25 is connected to the inner wall of the tank 1 via two vertically distributed second fixing plates 25. The limiting rod 25 passes through the annular plate 16 and can slide along the annular plate 16. The limiting rod 25 has a limiting function on the annular plate 16, which can ensure that the annular plate 16 moves stably along the lead screw 14.

[0037] like Figure 3-4As shown, the brush 17 is a soft, high-temperature resistant brush, and the brush 17 is detachably connected to the annular plate 16. The soft, high-temperature resistant nature of the brush 17 improves its service life, and the detachable connection between the brush 17 and the annular plate 16 facilitates future replacement and maintenance.

[0038] like Figure 3 As shown, a water collection tank 18 is installed inside the tank body 1. The water collection tank 18 has a conical cross-section, and the top end of the first liquid outlet pipe 6 is located inside the water collection tank 18. By setting up the water collection tank 18, the liquid generated during the cooling of high-temperature exhaust gas can be collected and centrally recycled.

[0039] like Figure 3 As shown, a guide plate 19 is installed at the bottom of the air inlet pipe 3. The guide plate 19 has an inverted trapezoidal cross-section and is located inside the connecting pipe 8, where it contacts and engages with the inner wall of the connecting pipe 8. By setting the guide plate 19, steam can be evenly dispersed inside the connecting pipe 8 and evenly discharged into the tank 1 through the air outlet 9.

[0040] like Figure 1-3 As shown, support legs 20 are installed at the four corners of the bottom surface of the tank 1, and a support plate 21 is installed on the bottom surface of each support leg 20. The bottom surface of each support plate 21 is rough. Through the cooperation of the support legs 20 and the support plates 21, the tank 1 can be supported. The rough bottom surface of the support plate 21 increases the friction of the support plate 21 and improves the stability of the device.

[0041] like Figure 1-3 As shown, control valves 22 are installed on both the first liquid outlet pipe 6 and the gas outlet pipe 5. The control valves 22 can control the opening and closing of the first liquid outlet pipe 6 and the gas outlet pipe 5.

[0042] like Figure 1-3 As shown, the can lid 2 is detachably connected to the can body 1 by fastening bolts 23, and a sealing gasket 24 is installed on the inner wall of the can lid 2. The detachable connection between the can lid 2 and the can body 1 by fastening bolts 23 facilitates the installation and removal of the can lid 2, making it convenient for maintenance of this device. The sealing gasket 24 makes the connection between the can body 1 and the can lid 2 tighter, ensuring the internal sealing of the can body 1.

[0043] This solution also includes a controller, the location of which is set by the staff according to the actual situation during operation. The controller is used to control the electrical components used in this solution. The controller is one of an Intel processor, AMD processor, PLC controller, ARM processor, or microcontroller. It is used in conjunction with a motherboard, memory module, storage medium, and power supply, which is AC power or lithium battery. When a display screen is provided, a display card is also provided. For the operating principle of the controller, please refer to "Automatic Control Principles", "Microcontroller Principles and Application Simulation Cases", and "Sensor Principles and Applications" published by Tsinghua University Press. Other books in this field can also be consulted. Other automation control and electrical components not mentioned are knowledge well known to those skilled in the art and will not be described in detail here.

[0044] Working principle:

[0045] When using this device, firstly, the cooling liquid is introduced into the spiral cooling pipe 10 through the liquid inlet pipe 4. After passing through the spiral cooling pipe 10, it flows out through the second liquid outlet pipe 7, forming a circulation of the cooling liquid. Then, the high-temperature exhaust gas is introduced into the tank 1 through the air inlet pipe 3, and then into the connecting pipe 8. After passing through the air outlet 9, it is evenly distributed in the tank 1 and then comes into full contact with the spiral cooling pipe 10, thereby exchanging heat and cooling the high-temperature exhaust gas. The cooled gas is discharged through the air outlet pipe 5, and the liquid formed after cooling will fall into the collection tank 18 and be collected and recycled through the first liquid outlet pipe 6.

[0046] When impurities or crystals accumulate on the surface of the spiral cooling pipe 10, the motor 11 operates, driving the first helical gear 12 to rotate. The rotation of the first helical gear 12 drives the second helical gear 15 to rotate. The rotation of the second helical gear 15 drives the lead screw 14 to rotate. The rotation of the lead screw 14 drives the annular plate 16 to move. The movement of the annular plate 16 drives the brush 17 to move, thereby enabling the brush 17 to clean the surface of the spiral cooling pipe 10.

[0047] In the description of this utility model, it should be understood that the terms "upper," "side," "inner," 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 adjustable irrigation flushing gun or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In addition, it should be noted that unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" should be interpreted broadly. For example, it 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 the internal communication of two elements or the interaction relationship of two elements. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A closed-loop circulation device for recovering and utilizing waste heat from spray drying tower exhaust gas, comprising a tank (1), characterized in that: The tank body (1) is provided with a tank cover (2) at the top. An air inlet pipe (3) is installed in the middle of the top surface of the tank cover (2). A liquid inlet pipe (4) is installed on one side of the top surface of the tank cover (2). An air outlet pipe (5) is installed on the other side of the top surface of the tank cover (2). A first liquid outlet pipe (6) is installed in the middle of the bottom surface of the tank body (1). A second liquid outlet pipe (7) is installed on one side of the bottom surface of the tank body (1). A connecting pipe (8) is installed on the inner wall of the bottom surface of the tank cover (2). Several evenly distributed air outlet holes (9) are opened on the connecting pipe (8). The air inlet pipe (3) is located inside the connecting pipe (8). A spiral cooling pipe (10) is provided inside the tank body (1). The top end of the spiral cooling pipe (10) is fixedly connected to the air inlet pipe (3). The bottom end of the spiral cooling pipe (10) is fixedly connected to the second liquid outlet pipe (7). The spiral cooling pipe (10) is located outside the connecting pipe (8). A cleaning component is provided inside the tank body (1).

2. A spray drying tower tail gas waste heat recovery and utilization closed circuit circulating device according to claim 1, characterized in that: The cleaning component includes: A motor (11) is fixedly installed on one side of the tank (1). A first helical gear (12) is installed on the inner end of the shaft of the motor (11). A lead screw (14) is rotatably installed on the inner wall of one side of the tank (1) through a first fixing plate (13). A second helical gear (15) is installed on the outer periphery of the top end of the lead screw (14). The second helical gear (15) meshes with the first helical gear (12). An annular plate (16) is threaded on the lead screw (14). Several brushes (17) are evenly installed on the inner wall of the annular plate (16). The brushes (17) contact and cooperate with the spiral cooling pipe (10). A limit component is installed on the annular plate (16).

3. A spray drying tower tail gas waste heat recovery and utilization closed circuit circulating device according to claim 2, characterized in that: The limiting component includes: The limiting rod (25) is connected to the inner wall of the tank (1) through two upper and lower distributed second fixing plates (26). The limiting rod (25) passes through the annular plate (16) and can slide along the annular plate (16).

4. The spray drying tower tail gas waste heat recovery and utilization closed circuit circulating device according to claim 2, characterized in that: The brush (17) is a soft, high-temperature resistant brush, and the brush (17) and the annular plate (16) are detachably connected.

5. The spray drying tower tail gas waste heat recovery and utilization closed circuit circulating device according to claim 1, characterized in that: The tank (1) is equipped with a water collection tank (18), the water collection tank (18) has a conical cross section, and the top of the first liquid outlet pipe (6) is located inside the water collection tank (18).

6. The spray drying tower tail gas waste heat recovery and utilization closed circuit circulating device according to claim 1, characterized in that: The bottom end of the air intake pipe (3) is equipped with a guide plate (19). The cross section of the guide plate (19) is inverted trapezoidal. The guide plate (19) is located inside the connecting pipe (8) and is in contact with the inner wall of the connecting pipe (8).

7. The spray drying tower tail gas waste heat recovery and utilization closed circuit circulating device according to claim 1, characterized in that: The tank body (1) has four support legs (20) installed at the four corners of its bottom surface. Each support leg (20) has a support plate (21) installed on its bottom surface. The bottom surface of each support plate (21) is rough.

8. The spray drying tower tail gas waste heat recovery and utilization closed circuit circulating device according to claim 1, characterized in that: Control valves (22) are installed on both the first liquid outlet pipe (6) and the gas outlet pipe (5).

9. A closed-loop circulation device for recovering and utilizing waste heat from spray drying tower tail gas according to claim 1, characterized in that: The can lid (2) is detachably connected to the can body (1) by fastening bolts (23), and a sealing gasket (24) is installed on the inner wall of the can lid (2).

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