Heating device for low-temperature waste gas generated after heat exchange of dryer

Abstract

The utility model discloses a heating device for low-temperature waste gas after heat exchange of a dryer, which relates to the technical field of dryer corollary equipment and comprises a dryer shell, a bottom hot air inlet is welded at the bottom of the right side of the dryer shell, and a temperature rising component capable of heating the low-temperature waste gas is arranged between the dryer shell and a fan. According to the heating device for the low-temperature waste gas after heat exchange of the dryer, by arranging the bottom hot air inlet, the hot air conveying main pipe and the hot air conveying branch pipe, when the heating device is used, in the hot air conveying process of the hot air conveying main pipe, part of hot air floats upwards along the hot air conveying branch pipe and enters the interior of the dryer shell through the air supply pipe and the top hot air inlet; the waste gas is heated to a temperature above a dew point, so that the function of heating the waste gas is realized, and the problems of low temperature and high humidity of the waste gas of the device are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of dryer supporting equipment, specifically a heating device for low-temperature exhaust gas after heat exchange in a dryer. Background Technology

[0002] The principle of a grate dryer is that the material is dried in a slightly boiling, co-current state within the grate dryer. A row of hot air blowers is arranged in sections on the lower shell of the grate. These blowers deliver clean, hot air from a hot air furnace to the lower part of the grate at a controlled temperature. This hot air penetrates the grate through labyrinthine gaps or holes, exchanging heat with the material on the grate and evaporating a large amount of water, thus achieving the desired drying effect.

[0003] However, in actual operation, because the exhaust gas after heat exchange is low in temperature, high in humidity and high in dust content, it is easy to condense after entering the dust collector. The dust with high humidity adheres to the dust collection bag, and the dust collector bag is seriously clogged, which eventually causes the bag to become stuck and the machine to stop operating, resulting in process accidents.

[0004] Now, a novel heating device for the low-temperature exhaust gas after heat exchange in a dryer is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a heating device for low-temperature exhaust gas after heat exchange in a dryer, so as to solve the problems of low exhaust gas temperature and high humidity mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a heating device for low-temperature exhaust gas after heat exchange in a dryer, comprising a dryer shell, a bottom hot air inlet welded to the bottom right side of the dryer shell, a fan arranged on the right side of the dryer shell, a hot air furnace inlet pipe fixedly connected to the front end of the fan, an exhaust gas collection port fixedly connected to the top of the dryer shell, an exhaust gas discharge pipe fixedly connected to the top of the exhaust gas collection port, a grate bed fixedly connected to the middle position inside the dryer shell, and a heating component for heating the low-temperature exhaust gas arranged between the dryer shell and the fan.

[0007] The heating assembly includes a hot air delivery main pipe, which is fixedly connected to the left side of the fan. A first pneumatic butterfly valve is installed on the left side of the hot air delivery main pipe. A hot air delivery branch pipe is welded and fixed to the top of the hot air delivery main pipe. A second pneumatic butterfly valve is installed at the top of the hot air delivery branch pipe. A top hot air inlet is welded and fixed to the top right side of the dryer housing. An air supply pipe is fixedly connected to the right side of the top hot air inlet.

[0008] As a further technical solution of this utility model, the left side of the first pneumatic butterfly valve is connected to the right side of the bottom hot air inlet, and the top of the second pneumatic butterfly valve is connected to the bottom of the air supply pipe.

[0009] As a further technical solution of this utility model, the bottom hot air inlet, the hot air conveying main pipe, and the first pneumatic butterfly valve are internally connected, and the hot air conveying main pipe, the hot air conveying branch pipe, the second pneumatic butterfly valve, and the air supply pipe are internally connected.

[0010] As a further technical solution of this utility model, an annular tube is provided above the grate bed, an arc-shaped surface is provided at the bottom end of the annular tube, an inclined surface is provided at the top end of the arc-shaped surface, multiple sets of hot air nozzles are opened at the top of the inner ring of the annular tube, the top hot air inlet is connected to the inside of the annular tube, and the outer ring of the annular tube is fixedly connected to the inner wall of the dryer shell.

[0011] As a further technical solution of this utility model, the hot air nozzles penetrate both the inner and outer surfaces of the annular pipe, and the hot air nozzles are arranged at equal intervals.

[0012] As a further technical solution of this utility model, a sensor mounting base is welded to the right side of the exhaust pipe, and a temperature sensor is inserted into the right side of the sensor mounting base from right to left. The sensor mounting base has internal threads, and the internal threads of the sensor mounting base match the external threads of the temperature sensor.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the heating device for the low-temperature exhaust gas after heat exchange in the dryer not only realizes the function of heating the exhaust gas, but also realizes the function of uniform gas dispersion, and also realizes the function of exhaust gas temperature monitoring.

[0014] (1) The dryer is equipped with a bottom hot air inlet, a hot air conveying main pipe, a first pneumatic butterfly valve, a hot air conveying branch pipe, a second pneumatic butterfly valve, an air supply pipe, and a top hot air inlet. During use, the material is placed horizontally on the grate. Clean hot air generated by the hot air furnace enters the blower under the guidance of the hot air furnace inlet pipe. The hot air, conveyed by the blower, enters the dryer shell along the hot air conveying main pipe and the bottom hot air inlet, and rises along the pores in the grate to dry the material on the grate. The exhaust gas generated after drying continues to rise and passes through the exhaust gas collection port and waste gas... The exhaust pipe enters the bag filter. During the process of transporting hot air, some of the hot air rises along the hot air delivery branch pipe and enters the interior of the dryer shell through the air supply pipe and the top hot air inlet. This heats the exhaust gas to above the dew point and dries the dust in the exhaust gas, ensuring that the dust collected by the dust collector is in a dry state for easy storage and transportation. The first and second pneumatic butterfly valves can adjust the gas flow rate in the hot air delivery main pipe and hot air delivery branch pipe, thus achieving the function of heating the exhaust gas.

[0015] (2) By setting up an annular pipe, arc surface, inclined surface and hot air nozzle, when in use, as hot air enters the dryer shell along the top hot air inlet, the annular pipe can restrict the flow path of the hot air, and the arc surface and inclined surface guide the path of the exhaust gas to surge upward. As the air pressure inside the annular pipe increases, the hot air nozzle in its inner ring sprays hot air towards the center position, and the hot air is scattered in multiple positions and angles to rapidly heat the exhaust gas and achieve the function of uniform gas dispersion.

[0016] (3) By setting up a sensor mounting base and a temperature sensor, when in use, the heated exhaust gas continues to rise and enters the bag filter along the exhaust gas collection port and exhaust gas discharge pipe. The temperature sensor on the sensor mounting base keeps monitoring the exhaust gas temperature, which makes it convenient for staff to control the temperature and adjust the first pneumatic butterfly valve and the second pneumatic butterfly valve accordingly, thus realizing the function of exhaust gas temperature monitoring. Attached Figure Description

[0017] Figure 1 This is a frontal cross-sectional view of the present invention.

[0018] Figure 2 This is a front view structural diagram of the heating component of this utility model;

[0019] Figure 3 For the present utility model Figure 1 Enlarged cross-sectional view of a portion of point A in the middle section;

[0020] Figure 4 This is a partial frontal cross-sectional enlarged structural schematic diagram of the exhaust pipe of this utility model.

[0021] In the diagram: 1. Dryer housing; 2. Bottom hot air inlet; 3. Hot air conveying main pipe; 4. First pneumatic butterfly valve; 5. Hot air conveying branch pipe; 6. Second pneumatic butterfly valve; 7. Air supply pipe; 8. Top hot air inlet; 9. Fan; 10. Hot air furnace inlet pipe; 11. Annular pipe; 12. Arc-shaped surface; 13. Inclined surface; 14. Hot air nozzle; 15. Exhaust gas collection port; 16. Exhaust gas discharge pipe; 17. Sensor mounting base; 18. Temperature sensor; 19. Grate bed. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example: Please refer to Figure 1-4 A heating device for low-temperature exhaust gas after heat exchange in a dryer includes a dryer shell 1, a bottom hot air inlet 2 welded to the bottom right side of the dryer shell 1, a fan 9 provided on the right side of the dryer shell 1, a hot air furnace inlet pipe 10 fixedly connected to the front end of the fan 9, an exhaust gas gathering port 15 fixedly connected to the top end of the dryer shell 1, an exhaust gas discharge pipe 16 fixedly connected to the top end of the exhaust gas gathering port 15, a grate bed 19 fixedly connected to the middle position inside the dryer shell 1, and a heating component for heating the low-temperature exhaust gas provided between the dryer shell 1 and the fan 9.

[0024] Please see Figure 1-4 A heating device for low-temperature exhaust gas after heat exchange in a dryer also includes a heating component. The heating component includes a hot air conveying main pipe 3, which is fixedly connected to the left side of the fan 9. A first pneumatic butterfly valve 4 is installed on the left side of the hot air conveying main pipe 3. A hot air conveying branch pipe 5 is welded and fixed to the top of the hot air conveying main pipe 3. A second pneumatic butterfly valve 6 is installed at the top of the hot air conveying branch pipe 5. A top hot air inlet 8 is welded and fixed to the top right side of the dryer housing 1. An air supply pipe 7 is fixedly connected to the right side of the top hot air inlet 8.

[0025] The left side of the first pneumatic butterfly valve 4 is connected to the right side of the bottom hot air inlet 2, the top of the second pneumatic butterfly valve 6 is connected to the bottom of the air supply pipe 7, the bottom hot air inlet 2, the hot air conveying main pipe 3, and the first pneumatic butterfly valve 4 are internally connected, the hot air conveying main pipe 3, the hot air conveying branch pipe 5, the second pneumatic butterfly valve 6, and the air supply pipe 7 are internally connected, which can rapidly heat the exhaust gas generated during drying.

[0026] Specifically, such as Figure 1 and Figure 2 As shown, during the hot air conveying process, some of the hot air rises along the hot air conveying branch pipe 5 and enters the interior of the dryer housing 1 through the air supply pipe 7 and the top hot air inlet 8. This heats the exhaust gas to above the dew point and dries the dust in the exhaust gas, ensuring that the dust collected by the dust collector is in a dry state for easy storage and transportation. The first pneumatic butterfly valve 4 and the second pneumatic butterfly valve 6 can adjust the gas flow rate in the hot air conveying main pipe 3 and the hot air conveying branch pipe 5.

[0027] An annular tube 11 is provided above the grate bed 19. An arc-shaped surface 12 is provided at the bottom end of the annular tube 11, and an inclined surface 13 is provided at the top end of the arc-shaped surface 12. Multiple sets of hot air nozzles 14 are opened at the top of the inner ring of the annular tube 11. The top hot air inlet 8 is connected to the inside of the annular tube 11. The outer ring of the annular tube 11 is fixedly connected to the inner wall of the dryer shell 1. The hot air nozzles 14 penetrate the inner and outer surfaces of the annular tube 11. The hot air nozzles 14 are arranged at equal intervals, which can evenly disperse the hot air and improve the heating effect.

[0028] Specifically, such as Figure 1 and Figure 3 As shown, the annular pipe 11 can restrict the flow path of hot air, and the arc surface 12 and the inclined surface 13 guide the upward flow of exhaust gas. As the internal air pressure of the annular pipe 11 increases, the hot air nozzle 14 in its inner ring sprays hot air towards the central position, dispersing hot air from multiple positions and angles to rapidly heat the exhaust gas.

[0029] A sensor mounting base 17 is welded to the right side of the exhaust pipe 16. A temperature sensor 18 is inserted into the right side of the sensor mounting base 17 from right to left. The sensor mounting base 17 has threads inside. The threads inside the sensor mounting base 17 match the threads outside the temperature sensor 18, which facilitates temperature monitoring.

[0030] Specifically, such as Figure 1 and Figure 4 As shown, the temperature sensor 18 on the sensor mounting base 17 monitors the exhaust gas temperature, making it convenient for staff to control the temperature and adjust the first pneumatic butterfly valve 4 and the second pneumatic butterfly valve 6 accordingly.

[0031] Working Principle: In use, the material is first placed horizontally on the grate 19. Clean hot air generated by the hot air furnace enters the blower 9 under the guidance of the hot air furnace inlet pipe 10. The hot air, transported by the blower 9, enters the dryer housing 1 along the hot air conveying main pipe 3 and the bottom hot air inlet 2, and rises along the gaps in the grate 19, drying the material on the grate 19. The exhaust gas generated after drying continues to rise and enters the bag filter through the exhaust gas collection port 15 and the exhaust gas discharge pipe 16. In the dust collector, during the process of conveying hot air through the main hot air conveying pipe 3, some of the hot air rises along the branch hot air conveying pipe 5 and enters the interior of the dryer shell 1 through the air supply pipe 7 and the top hot air inlet 8. This heats the exhaust gas to above the dew point and dries the dust in the exhaust gas, ensuring that the dust collected by the dust collector is in a dry state for easy storage and transportation. The first pneumatic butterfly valve 4 and the second pneumatic butterfly valve 6 can adjust the gas flow rate in the main hot air conveying pipe 3 and the branch hot air conveying pipe 5. As the hot air enters the dryer shell 1 along the top hot air inlet 8, the annular pipe 11 restricts the flow path of the hot air, while the arc surface 12 and the inclined surface 13 guide the upward flow of the exhaust gas. As the internal air pressure of the annular pipe 11 increases, the hot air nozzles 14 in its inner ring spray hot air towards the center, dispersing hot air from multiple positions and angles to rapidly heat the exhaust gas. The heated exhaust gas continues to rise and enters the bag filter along the exhaust gas collection port 15 and exhaust gas discharge pipe 16. The temperature sensor 18 on the sensor mounting base 17 keeps monitoring the exhaust gas temperature, which makes it convenient for the staff to control the temperature and adjust the first pneumatic butterfly valve 4 and the second pneumatic butterfly valve 6 accordingly.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A heating device for low-temperature exhaust gas after heat exchange in a dryer, comprising a dryer shell (1), characterized in that: A bottom hot air inlet (2) is welded to the bottom right side of the dryer housing (1). A fan (9) is provided on the right side of the dryer housing (1). A hot air furnace inlet pipe (10) is fixedly connected to the front end of the fan (9). A waste gas collection port (15) is fixedly connected to the top end of the dryer housing (1). A waste gas discharge pipe (16) is fixedly connected to the top end of the waste gas collection port (15). A grate bed (19) is fixedly connected to the middle position inside the dryer housing (1). A heating component that can heat low-temperature waste gas is provided between the dryer housing (1) and the fan (9). The heating component includes a hot air conveying main pipe (3), which is fixedly connected to the left side of the fan (9). A first pneumatic butterfly valve (4) is installed on the left side of the hot air conveying main pipe (3). A hot air conveying branch pipe (5) is welded and fixed to the top of the hot air conveying main pipe (3). A second pneumatic butterfly valve (6) is installed at the top of the hot air conveying branch pipe (5). A top hot air inlet (8) is welded and fixed to the top right side of the dryer housing (1). An air supply pipe (7) is fixedly connected to the right side of the top hot air inlet (8).

2. The heating device for low-temperature exhaust gas after heat exchange in a dryer according to claim 1, characterized in that: The left side of the first pneumatic butterfly valve (4) is connected to the right side of the bottom hot air inlet (2), and the top of the second pneumatic butterfly valve (6) is connected to the bottom of the air supply pipe (7).

3. The heating device for low-temperature exhaust gas after heat exchange in a dryer according to claim 1, characterized in that: The bottom hot air inlet (2), the hot air conveying main pipe (3), and the first pneumatic butterfly valve (4) are internally connected, and the hot air conveying main pipe (3), the hot air conveying branch pipe (5), the second pneumatic butterfly valve (6), and the air supply pipe (7) are internally connected.

4. The heating device for low-temperature exhaust gas after heat exchange in a dryer according to claim 1, characterized in that: An annular tube (11) is provided above the grate bed (19). An arc-shaped surface (12) is provided at the bottom end of the annular tube (11). An inclined surface (13) is provided at the top end of the arc-shaped surface (12). Multiple sets of hot air nozzles (14) are opened at the top of the inner ring of the annular tube (11). The top hot air inlet (8) is connected to the inside of the annular tube (11). The outer ring of the annular tube (11) is fixedly connected to the inner wall of the dryer housing (1).

5. The heating device for low-temperature exhaust gas after heat exchange in a dryer according to claim 4, characterized in that: The hot air nozzles (14) penetrate the inner and outer surfaces of the annular pipe (11), and the hot air nozzles (14) are arranged at equal intervals.

6. The heating device for low-temperature exhaust gas after heat exchange in a dryer according to claim 1, characterized in that: A sensor mounting base (17) is welded to the right side of the exhaust pipe (16). A temperature sensor (18) is inserted into the right side of the sensor mounting base (17) from right to left. The sensor mounting base (17) has internal threads, and the internal threads of the sensor mounting base (17) match the external threads of the temperature sensor (18).

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