A device for regulating exhaust gas temperature by means of a high-low temperature economizer and bypass door for a biomass boiler

Abstract

The application relates to the technical field of boiler devices, in particular to a biomass boiler high-low temperature economizer bypass door adjusting flue gas temperature device, which comprises a biomass boiler body and a flue gas discharge device, one side of the flue gas discharge device is fixedly connected with one side of the biomass boiler body, and a flue gas discharge pipe is fixedly connected between the biomass boiler body and the flue gas discharge device. Through the arranged adjusting assembly, the size of two gas outlets can be adjusted, the proportion of the gas in the biomass boiler body entering the first discharge assembly and the second discharge assembly can be adjusted, when the machine normally operates, the gas outlet on one side of the first discharge assembly is smallest, at the moment, the high-temperature gas is discharged through the second discharge assembly, when the device starts and the power is low, at the moment, the size of the gas outlet on one side of the first discharge assembly is increased, at the moment, most of the gas is discharged through the first discharge assembly, the device is prevented from being corroded due to the low temperature of the discharged gas, and the service life of the device is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of boiler equipment, and in particular to a high and low temperature energy saver for a biomass boiler with a bypass valve for regulating flue gas temperature. Background Technology

[0002] A biomass boiler is a boiler that uses biomass energy (such as straw, sawdust, rice husks, agricultural and forestry waste, etc.) as fuel. It releases heat by burning biomass fuel to heat water into steam or hot water for heating, power generation, or industrial production. Compared to coal-fired boilers, it features renewable fuel and low carbon emissions (approximately carbon neutral), meeting environmental protection requirements. However, due to the low calorific value and complex composition of biomass fuel, boiler design must be adapted to the fuel characteristics, typically requiring consideration of fuel pretreatment, combustion efficiency improvement, and anti-corrosion measures against sulfur, chlorine, and other components in the flue gas.

[0003] A search revealed Chinese Patent Publication No. CN222881205U, which discloses a biomass boiler flue gas temperature control device. This device includes a boiler exhaust pipe, a mounting plate, a temperature adjustment structure, a temperature detection area, an upper extension pipe, and a flue gas outlet. The mounting plate is fixedly installed at the lower end of the boiler exhaust pipe and connected to the biomass boiler. The temperature adjustment structure is fixedly installed at the upper end of the boiler exhaust pipe, and the temperature detection area is fixedly installed at the upper end of the temperature adjustment structure. The upper extension pipe is fixedly installed at the upper end of the temperature detection area. The flue gas outlet is fixedly installed at the top of the upper extension pipe.

[0004] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: Although the device can quickly detect and reduce the temperature of the exhaust gas during use, in actual use, it can only reduce the exhaust gas temperature. However, during the initial startup of the biomass boiler or at low load operation, the exhaust gas temperature may be lower than the set value, which may lead to low-temperature corrosion. Utility Model Content

[0005] To address the problems mentioned in the background art, this application provides a biomass boiler high and low temperature energy saver with bypass valve to regulate flue gas temperature.

[0006] This application provides a biomass boiler high and low temperature energy saver with bypass door to regulate flue gas temperature, which adopts the following technical solution: it includes a biomass boiler body and a flue gas device, one side of the flue gas device is fixedly connected to one side of the biomass boiler body, and a flue gas pipe is fixedly connected between the biomass boiler body and the flue gas device.

[0007] The exhaust device includes a housing, a first partition, a second partition, and a third partition. One side of the housing is fixedly connected to one side of the biomass boiler body. The outer walls of the first and second partitions are fixedly connected to the inner walls of the housing. The two sides of the third partition are fixedly connected to the opposite sides of the first and second partitions. Two air outlets are provided on the first partition. An adjustment assembly is fixedly connected inside the housing below the two air outlets. A first discharge assembly and a second discharge assembly are fixedly connected between the first and second partitions. A connecting pipe is fixedly connected between the sides of the first and second discharge assemblies away from the second partition.

[0008] Optionally, the adjustment assembly includes: a temperature sensor, a drive group, a mounting frame, a first support plate, a second support plate, two fixed cylinders, and two sliding rods. One side of the mounting frame is fixedly connected to one side of the interior of the housing. One side of each of the two fixed cylinders is fixedly connected to the side of the mounting frame away from the housing. The two sliding rods are slidably connected to the interiors of the two fixed cylinders. A baffle is fixedly connected to the side of each sliding rod away from the two fixed cylinders. The first support plate and the second support plate are fixedly connected perpendicularly to each other inside the mounting frame. One side of the drive group is fixedly connected to one side of the interior of the housing, and the drive group is rotatably connected to the first support plate and the second support plate. The output end of the drive group is threadedly connected to the two sliding rods. One side of the temperature sensor is fixedly connected to one side of the interior of the housing, and the other side of the temperature sensor is fixedly connected to one side of the drive group.

[0009] Optionally, the size of the two baffles is matched with the size of the two air outlets.

[0010] Optionally, the drive assembly includes: a drive motor, a connecting belt, two threaded rods, two transmission rods, and two transmission gear sets. The two threaded rods are respectively threaded into the interior of the two sliding rods. The sides of the two threaded rods away from the two sliding rods are respectively fixedly connected to one side of the two transmission gear sets. One side of the two transmission rods is respectively fixedly connected to the other side of the two transmission gear sets. The two threaded rods are rotatably connected to the first support plate, and the two transmission rods are rotatably connected to the second support plate. One side of the drive motor is fixedly connected to one side of the interior of the housing. The connecting belt is sleeved on the output end of the drive motor and the outside of the two transmission rods, and one side of the drive motor is fixedly connected to one side of the temperature sensor.

[0011] Optionally, the first discharge assembly includes a discharge pipe, with its two sides fixedly connected to the opposite sides of the first partition and the second partition, respectively, and the side of the discharge pipe closest to the second partition fixedly connected to one side of the connecting pipe.

[0012] Optionally, the second discharge assembly includes: a high-temperature energy saver, a low-temperature energy saver, and a plurality of exhaust pipes. One side of the high-temperature energy saver and the low-temperature energy saver are fixedly connected to one side of the interior of the housing. The plurality of exhaust pipes are respectively located between the high-temperature energy saver, the low-temperature energy saver, the first partition, and the second partition. The side of the plurality of exhaust pipes closest to the second partition is fixedly connected to the side of the connecting pipe away from the discharge pipe.

[0013] Optionally, a through pipe is fixedly connected to the side of the connecting pipe away from the plurality of discharge pipes, and the through pipe extends out of one side of the housing from the side away from the connecting pipe.

[0014] In summary, this application includes the following beneficial technical effects:

[0015] This invention utilizes an adjustable component to regulate the size of two air outlets. By adjusting the ratio of the two outlet sizes, the proportion of gas exiting the biomass boiler body entering the first and second discharge components can be controlled. When the machine is operating normally, the air outlet on one side of the first discharge component is adjusted to its minimum size, allowing high-temperature gas to exit through the second discharge component. The second discharge component facilitates heat exchange between the gas and the gas, improving the energy utilization rate of the device. When the power is low during the initial startup phase, the size of the air outlet on one side of the first discharge component is increased. At this time, most of the gas exiting through the first discharge component merges with the gas after heat exchange with the gas from the second discharge component before being discharged. This increases the temperature of the discharged gas, preventing corrosion of the device due to low-temperature discharged gas and extending the device's service life.

[0016] This invention, through the inclusion of high-temperature and low-temperature energy-saving devices, allows gas to pass through the high-temperature energy-saving device first when it is discharged through the second discharge assembly. The high-temperature gas undergoes heat exchange within the energy-saving device, lowering its temperature. Then, the gas enters the low-temperature energy-saving device, where it undergoes a second heat exchange. This process ensures the discharged gas meets standards and allows for more complete absorption of residual heat, increasing the energy efficiency of the device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the structure on one side of the box in an embodiment of this application;

[0019] Figure 3 This is a schematic diagram of the internal structure of the box in an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of one side of the first partition in an embodiment of this application;

[0021] Figure 5 This is a schematic diagram of the internal structure of the fixed cylinder and sliding rod in the embodiments of this application.

[0022] Reference numerals in the attached drawings: 1. Biomass boiler body; 2. Exhaust pipe; 3. Housing; 4. First partition; 5. Second partition; 6. Third partition; 7. Exhaust port; 8. Connecting pipe; 9. Temperature sensor; 10. Mounting frame; 11. First support plate; 12. Second support plate; 13. Fixed cylinder; 14. Sliding rod; 15. Baffle; 16. Drive motor; 17. Connecting belt; 18. Threaded rod; 19. Transmission rod; 20. Discharge pipe; 21. High-temperature energy saver; 22. Low-temperature energy saver; 23. Exhaust pipe; 24. Through pipe; 25. Transmission gear set. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0024] This application discloses a high and low temperature energy-saving device for biomass boilers with a bypass valve for regulating flue gas temperature. For example... Figure 1 As shown, the device includes a biomass boiler body 1 and a flue gas exhaust device. One side of the flue gas exhaust device is fixedly connected to one side of the biomass boiler body 1, and a flue gas pipe 2 is fixedly connected between the biomass boiler body 1 and the flue gas exhaust device.

[0025] During use, the high-temperature gas generated by the biomass boiler body 1 during operation is discharged into the housing 3 through the flue pipe 2. The gas is then cooled to a safe range by the high-temperature energy saver 21, the low-temperature energy saver 22 and the discharge pipe 20 installed inside the housing 3 before being discharged, making the device safer to use.

[0026] Please see Figure 2 as well as Figure 3The exhaust system includes: a housing 3, a first partition 4, a second partition 5, and a third partition 6. One side of the housing 3 is fixedly connected to one side of the biomass boiler body 1. The outer walls of the first partition 4 and the second partition 5 are fixedly connected to the inner walls of the housing 3. The two sides of the third partition 6 are fixedly connected to the opposite sides of the first partition 4 and the second partition 5. The first partition 4 has two air outlets 7. An adjusting assembly is fixedly connected inside the housing 3 below the two air outlets 7. A first discharge assembly and a second discharge assembly are fixedly connected between the first partition 4 and the second partition 5. A connecting pipe 8 is fixedly connected between the sides of the first discharge assembly and the second discharge assembly away from the second partition 5. The first discharge assembly includes: a discharge pipe 20. The two sides of the exhaust pipe 20 are fixedly connected to the opposite sides of the first partition 4 and the second partition 5, respectively. The side of the exhaust pipe 20 near the second partition 5 is fixedly connected to the side of the connecting pipe 8. The second exhaust assembly includes: a high temperature energy saver 21, a low temperature energy saver 22 and multiple exhaust pipes 23. The sides of the high temperature energy saver 21 and the low temperature energy saver 22 are fixedly connected to the inside side of the housing 3. The multiple exhaust pipes 23 are located between the high temperature energy saver 21, the low temperature energy saver 22, the first partition 4 and the second partition 5, respectively. The side of the multiple exhaust pipes 23 near the second partition 5 is fixedly connected to the side of the connecting pipe 8 away from the exhaust pipe 20. The side of the connecting pipe 8 away from the multiple exhaust pipes 20 is fixedly connected to a through pipe 24. The side of the through pipe 24 away from the connecting pipe 8 extends out of the housing 3.

[0027] During operation, when the gas generated by the biomass boiler body 1 is introduced into the housing 3, the temperature sensor 9 detects the gas temperature. When the temperature is high, the temperature sensor 9 controls the drive motor 16 to move the two sliding rods 14. During the movement of the two sliding rods 14, they drive the two baffles 15 to move synchronously. Since the size of the two baffles 15 corresponds to the size of the two air outlets 7, and the gas temperature is high, the two baffles 15 block the air outlets 7 located on the side of the discharge pipe 20. At this time, all the gas enters the high-temperature energy saver 21 through the exhaust pipe 23. The high-temperature energy saver 21 initially exchanges heat with the gas, which can lower the gas temperature. Then the gas continues to enter the low-temperature energy saver 22, where it undergoes further gas exchange, which can lower the gas temperature. When the temperature drops to the discharge temperature, the gas is discharged through the connecting pipe 8 and the through pipe 24 to avoid the discharged gas temperature being too high. When the temperature sensor 9 detects that the gas temperature is low, the temperature sensor 9 controls the drive motor 16 to reduce the size of the vent 7 on the side of the exhaust pipe 23 by the two baffles 15. At the same time, the drive motor 16 will drive the other baffle 15 to move synchronously, increasing the size of the vent 7 on the side of the discharge pipe 20. At this time, most of the gas directly enters the discharge pipe 20, and a small part continues to exchange heat through the high temperature energy saver 21 and the low temperature energy saver 22. The gas in the discharge pipe 20 and the exhaust pipe 23 are then mixed through the connecting pipe 8 before being discharged. This can increase the temperature of the discharged gas and avoid corrosion of the equipment caused by the low temperature of the discharged gas. When using this device, it is not only suitable for high temperature gas discharge, but also for low temperature gas discharge, so that the device has a longer service life.

[0028] Please see Figure 4 as well as Figure 5 The drive assembly includes: a drive motor 16, a connecting belt 17, two threaded rods 18, two transmission rods 19, and two transmission gear sets 25. The two threaded rods 18 are threadedly connected to the inside of the two sliding rods 14. The side of the two threaded rods 18 away from the two sliding rods 14 is fixedly connected to one side of the two transmission gear sets 25. One side of the two transmission rods 19 is fixedly connected to the other side of the two transmission gear sets 25. The two threaded rods 18 are rotatably connected to the first support plate 11. The two transmission rods 19 are rotatably connected to the second support plate 12. One side of the drive motor 16 is fixedly connected to one side of the inside of the housing 3. The inner sidewall of the connecting belt 17 is in contact with the outer sidewall of the output end of the two transmission rods 19 and the drive motor 16, respectively. One side of the drive motor 16 is fixedly connected to one side of the temperature sensor 9.

[0029] During use, the temperature is detected by the temperature sensor 9. At this time, the drive motor 16 drives the two transmission rods 19 to move synchronously through the connecting belt 17. When the two transmission rods 19 rotate, the two threaded rods 18 will rotate synchronously through the transmission gear set 25. The two threaded rods 18 are installed in opposite directions in the two sliding rods 14. When the two threaded rods 18 rotate, due to the restriction of the fixed cylinder 13, the two sliding rods 14 will move in opposite directions. That is, when one side baffle 15 completely blocks one side of the air outlet 7, the other side baffle 15 will completely open the other side of the air outlet 7. At this time, the device can synchronously adjust the opening and closing ratio of the two air outlets 7, making the device more convenient to use and allowing control of the ratio of the two air outlets 7.

[0030] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A biomass boiler high and low temperature energy saver with bypass valve for regulating flue gas temperature, characterized in that: It includes a biomass boiler body (1) and a flue gas device. One side of the flue gas device is fixedly connected to one side of the biomass boiler body (1), and a flue gas pipe (2) is fixedly connected between the biomass boiler body (1) and the flue gas device. The exhaust device includes: a housing (3), a first partition (4), a second partition (5), and a third partition (6). One side of the housing (3) is fixedly connected to one side of the biomass boiler body (1). The outer walls of the first partition (4) and the second partition (5) are fixedly connected to the inner walls of the housing (3). The two sides of the third partition (6) are fixedly connected to the opposite sides of the first partition (4) and the second partition (5). Two air outlets (7) are provided on the first partition (4). An adjustment component is fixedly connected inside the housing (3) below the two air outlets (7). A first discharge component and a second discharge component are fixedly connected between the first partition (4) and the second partition (5). A connecting pipe (8) is fixedly connected between the side of the first discharge component and the side of the second discharge component away from the second partition (5).

2. The biomass boiler high and low temperature energy saver with bypass valve for regulating flue gas temperature according to claim 1, characterized in that: The adjustment assembly includes: a temperature sensor (9), a drive unit, a mounting frame (10), a first support plate (11), a second support plate (12), two fixed cylinders (13), and two sliding rods (14). One side of the mounting frame (10) is fixedly connected to one side of the interior of the housing (3). One side of each of the two fixed cylinders (13) is fixedly connected to the side of the mounting frame (10) away from the housing (3). The two sliding rods (14) are slidably connected inside the two fixed cylinders (13), and the two sliding rods (14) are slidably connected to the side of the two fixed cylinders (13) away from one side of the two fixed cylinders (13). Each side is fixedly connected to a baffle (15). The first support plate (11) and the second support plate (12) are fixedly connected to each other perpendicularly inside the mounting frame (10). One side of the drive group is fixedly connected to one side of the box (3) and the drive group is rotatably connected to the first support plate (11) and the second support plate (12). The output end of the drive group is threadedly connected to the two sliding rods (14). One side of the temperature sensor (9) is fixedly connected to one side of the box (3) and the other side of the temperature sensor (9) is fixedly connected to one side of the drive group.

3. The biomass boiler high and low temperature energy saver with bypass valve for regulating flue gas temperature according to claim 2, characterized in that: The two baffles (15) are sized to match the two air vents (7).

4. The biomass boiler high and low temperature energy saver with bypass valve for regulating flue gas temperature according to claim 3, characterized in that: The drive assembly includes: a drive motor (16), a connecting belt (17), two threaded rods (18), two transmission rods (19), and two transmission gear sets (25). The two threaded rods (18) are threadedly connected to the inside of the two sliding rods (14). The side of the two threaded rods (18) away from the two sliding rods (14) is fixedly connected to one side of the two transmission gear sets (25). One side of the two transmission rods (19) is fixedly connected to the other side of the two transmission gear sets (25). The two threaded rods (18) are rotatably connected to the first support plate (11). The two transmission rods (19) are rotatably connected to the second support plate (12). One side of the drive motor (16) is fixedly connected to one side of the inside of the housing (3). The connecting belt (17) is sleeved on the output end of the drive motor (16) and the outside of the two transmission rods (19). One side of the drive motor (16) is fixedly connected to one side of the temperature sensor (9).

5. A biomass boiler high and low temperature energy saver with bypass valve for regulating flue gas temperature according to claim 4, characterized in that: The first discharge assembly includes a discharge pipe (20), the two sides of which are fixedly connected to the opposite sides of the first partition (4) and the second partition (5), respectively, and the side of the discharge pipe (20) near the second partition (5) is fixedly connected to one side of the connecting pipe (8).

6. A biomass boiler high and low temperature energy saver with bypass valve for regulating flue gas temperature according to claim 5, characterized in that: The second discharge assembly includes a high-temperature energy saver (21), a low-temperature energy saver (22), and a plurality of exhaust pipes (23). One side of the high-temperature energy saver (21) and the low-temperature energy saver (22) are fixedly connected to one side of the interior of the housing (3). The plurality of exhaust pipes (23) are respectively located between the high-temperature energy saver (21), the low-temperature energy saver (22), the first partition (4), and the second partition (5). The side of the plurality of exhaust pipes (23) closest to the second partition (5) is fixedly connected to the side of the connecting pipe (8) away from the discharge pipe (20).

7. A biomass boiler high and low temperature energy saver with bypass valve for regulating flue gas temperature according to claim 6, characterized in that: A through pipe (24) is fixedly connected to the side of the connecting pipe (8) away from the plurality of discharge pipes (20), and the through pipe (24) extends out of the box body (3) from the side away from the connecting pipe (8).

Images