Low-nitrogen energy-saving flue gas condensation waste heat recovery device

Abstract

The utility model relates to the technical field of waste heat recovery devices, and discloses a low-nitrogen energy-saving flue gas condensation waste heat recovery device which comprises a first connecting pipe, one side of the first connecting pipe is fixedly connected with a fan, the other end of the first connecting pipe is fixedly connected with a low-nitrogen evaporation preheater, one side of the outer wall of the low-nitrogen evaporation preheater is provided with a combustion engine, and the combustion engine is connected with the fan. The output end of the burner is fixedly connected with a boiler, a smoke condensation waste heat recoverer is installed on one side of the outer wall of the boiler, a deep dehydration condenser is installed on one side of the outer wall of the smoke condensation waste heat recoverer, and a circulation assembly is installed on the adjacent side of the boiler. According to the utility model, air enters the filter box, is filtered by the filter plate and then enters the connecting pipe I for use; the fixing plate is rotated, the first spring loses pressure, the telescopic rod and the first spring drive the fixing frame to ascend, the filter plate extends out of the filter box, the filter plate can be efficiently replaced after being taken out, impurities are effectively intercepted, equipment abrasion is reduced, and the service life of equipment is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of waste heat recovery devices, and in particular to a low-NOx energy-saving flue gas condensation waste heat recovery device. Background Technology

[0002] A flue gas condensation waste heat recovery device is a type of equipment that recovers waste heat from industrial flue gas. It utilizes the temperature difference between the flue gas and a low-temperature medium through heat exchange, transferring heat from the flue gas to the low-temperature medium, thus achieving waste heat recovery and reuse. It mainly consists of heat exchange elements, a shell, inlet and outlet pipes, and related auxiliary equipment. The use of low-NOx energy-saving flue gas condensation waste heat recovery devices is significant because it meets energy conservation and emission reduction requirements, effectively recovers energy and improves energy utilization efficiency, reduces nitrogen oxide emissions and environmental pollution, and simultaneously brings economic benefits to enterprises, enhances their competitiveness, promotes technological innovation in the industry, and contributes to sustainable development. It is of great importance to environmental protection and social development.

[0003] Existing flue gas condensation waste heat recovery devices mostly operate by directly venting air into the low-NOx evaporative preheater. However, in dusty environments, directly venting air into the preheater via a fan can disrupt the uniformity of airflow distribution due to the accumulation of impurities. This uneven airflow can lead to localized over- or under-heat exchange, resulting in uneven temperatures across the device and generating thermal stress. Prolonged thermal stress can damage the device structure, reduce its mechanical strength, and affect its overall performance and stability. Therefore, a low-NOx energy-saving flue gas condensation waste heat recovery device is proposed to address these issues. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a low-NOx energy-saving flue gas condensation waste heat recovery device, which aims to improve the problem of the lack of air filtration structure in the prior art, which leads to a decrease in the service life of the equipment.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-NOx energy-saving flue gas condensation waste heat recovery device, comprising a connecting pipe, one side of which is fixedly connected to a fan, and the other end of which is fixedly connected to a low-NOx evaporative preheater. A burner is installed on one side of the outer wall of the low-NOx evaporative preheater, and a boiler is fixedly connected to the output end of the burner. A flue gas condensation waste heat recovery device is installed on one side of the outer wall of the boiler, and a deep dehydration condenser is installed on one side of the outer wall of the flue gas condensation waste heat recovery device. A circulation component is installed on the adjacent side of the boiler, and a filter component is installed between the fan and the low-NOx evaporative preheater.

[0006] The filtering assembly comprises a filtering box, the filtering box is fixedly connected with an output end of a fan, a fixed frame is slidably connected in the filtering box, a filter plate is slidably connected in the fixed frame, and a dismounting assembly is mounted on an inner wall of the filtering box.

[0007] Further, the dismounting assembly comprises a telescopic rod, one end of the telescopic rod is fixedly connected to a top inner wall of the filtering box, a spring one is sleeved on an outer wall of the telescopic rod, the other end of the telescopic rod is fixedly connected to one side of an outer wall of the fixed frame, a rotating plate is rotatably connected in the filtering box, and a fixed plate is rotatably connected to an upper surface of the filtering box.

[0008] Further, one side of an outer wall of the filtering box is fixedly connected with a connecting pipe one, one end of the connecting pipe one is fixedly connected to a lower side of an outer wall of the low-nitrogen evaporation preheater, the low-nitrogen evaporation preheater is connected with the combustion machine through a connecting pipe two, the flue gas condensing waste heat recovery device is connected with the deep dehydration condenser through a connecting pipe three, one side of an outer wall of the deep dehydration condenser is fixedly connected with an exhaust pipe, an upper surface of the flue gas condensing waste heat recovery device is slidably connected with a fixed cover, and the fixed cover is mounted with a fixing assembly.

[0009] Further, the circulating assembly comprises a circulating pump one, the circulating pump one is arranged on a side far away from the boiler, an output end of the circulating pump one is connected with the low-nitrogen evaporation preheater, an input end of the circulating pump one is connected with the deep dehydration condenser, a circulating pump two is fixedly connected to a side far away from the circulating pump one, an output end of the circulating pump two is connected with the deep dehydration condenser, and an input end of the circulating pump two is connected with the low-nitrogen evaporation preheater.

[0010] Further, the fixing assembly comprises a fixed column, a lower end of the fixed column is fixedly connected to an upper surface of the flue gas condensing waste heat recovery device, a spring three is slidably connected in the fixed column, one end of the spring three is fixedly connected with a clamping block, an upper surface of the fixed cover is fixedly connected with a supporting plate, an upper surface of the supporting plate is fixedly connected with a stabilizing plate, and the flue gas condensing waste heat recovery device is mounted with a pushing-out assembly.

[0011] Further, the pushing-out assembly comprises a spring two, a lower surface of the spring two is fixedly connected to an upper surface of the flue gas condensing waste heat recovery device, an upper surface of the spring two is fixedly connected with a sleeve ring, and one side of an outer wall of the supporting plate is fixedly connected with a clamping plate.

[0012] Further, an inner wall of the stabilizing plate is slidably connected to an outer wall of the fixed column, and the stabilizing plate is arranged on a lower surface of the clamping block.

[0013] Further, an inner wall of the clamping plate is slidably connected to an outer wall of the fixed column, and a lower surface of the clamping plate is attached to an upper surface of the sleeve ring.

[0014] The advantages and positive effects of the utility model are:

[0015] 1. In this utility model, after air enters the filter box, it is filtered by the filter plate and then discharged into the connecting pipe for use. At the same time, by rotating the fixing plate, the spring loses pressure, and the telescopic rod and spring drive the fixing frame to rise. At this time, the movement of the fixing frame drives the filter plate to extend out of the filter box. By taking out the filter plate, the filter plate can be replaced efficiently, thereby improving the service life of the equipment.

[0016] 2. In this utility model, pressing the locking block causes the third spring to extend and retract. At this time, the extension and retraction of the second spring causes the collar to extend and retract. Simultaneously, as the locking block disengages from the top of the stabilizing plate, the collar pushes the locking plate to lift, thereby enabling the quick disassembly of the fixed cover. This facilitates the regular cleaning of the inside of the flue gas condensation waste heat recovery unit, thus improving the practicality of the device. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the low-NOx energy-saving flue gas condensation waste heat recovery device proposed in this utility model.

[0018] Figure 2 This is a schematic diagram of the filter box part of the low-NOx energy-saving flue gas condensation waste heat recovery device proposed in this utility model.

[0019] Figure 3 This is a schematic diagram of the fixed frame portion of the low-NOx energy-saving flue gas condensation waste heat recovery device proposed in this utility model.

[0020] Figure 4 This is a schematic diagram of the fixed column part of the low-NOx energy-saving flue gas condensation waste heat recovery device proposed in this utility model.

[0021] Figure 5 for Figure 4 Enlarged view of point A in the image.

[0022] Legend:

[0023] 1. Fan; 2. Connecting pipe one; 3. Low-NOx evaporative preheater; 4. Connecting pipe two; 5. Burner; 6. Boiler; 7. Flue gas condensing waste heat recovery unit; 8. Connecting pipe three; 9. Deep dehydration condenser; 10. Exhaust pipe; 11. Circulating pump one; 12. Circulating pump two; 13. Filter box; 14. Telescopic rod; 15. Spring one; 16. Fixing frame; 17. Filter plate; 18. Rotating plate; 19. Fixing plate; 20. Fixing column; 21. Spring two; 22. Collar; 23. Spring three; 24. Clamping block; 25. Fixing cover; 26. Support plate; 27. Stabilizing plate; 28. Clamping plate. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] With reference to Figure 1 Figure 5 An embodiment provided by the utility model: low-nitrogen energy-saving flue gas condensing waste heat recovery device, including connecting pipe 2, connecting pipe 2 one side is fixedly connected with fan 1, and the other end of connecting pipe 2 is fixedly connected with low-nitrogen evaporation preheater 3, and the outer wall one side of low-nitrogen evaporation preheater 3 is installed with combustion engine 5, and the output end of combustion engine 5 is fixedly connected with boiler 6, and the outer wall one side of boiler 6 is installed with flue gas condensing waste heat recovery device 7, and the outer wall one side of flue gas condensing waste heat recovery device 7 is installed with depth dehydration condenser 9, and the adjacent one side of boiler 6 is installed with circulating assembly, and the filter assembly is installed between fan 1 and low-nitrogen evaporation preheater 3;

[0026] The filter assembly includes filter box 13, and the filter box 13 is fixedly connected with the output end of fan 1, and the filter box 13 is slidably connected with fixed frame 16 inside, and the fixed frame 16 is slidably connected with filter plate 17 inside, and the inner wall of filter box 13 is installed with dismounting assembly;The dismounting assembly includes telescopic rod 14, and one end of telescopic rod 14 is fixedly connected with the inner wall top of filter box 13, and spring 15 is sleeved on the outer wall of telescopic rod 14, and the other end of telescopic rod 14 is fixedly connected with the outer wall one side of fixed frame 16, and the inner wall of filter box 13 is rotatably connected with rotating plate 18, and the upper surface of filter box 13 is rotatably connected with fixed plate 19;

[0027] ​Specifically, the connecting pipe one 2 one side and the fan 1 fixed connection, the fan 1 is to provide air power for the whole system, to make the air circulation in the system, to ensure that the subsequent heat exchange and combustion process can be carried out smoothly, the connecting pipe one 2 the other end fixed connection has low nitrogen evaporation preheater 3, low nitrogen evaporation preheater 3 mainly uses the flue gas waste heat to preheat combustion air, improve the air temperature, so that the fuel can be more fully burned, reduce fuel consumption and reduce the generation of nitrogen oxides, low nitrogen evaporation preheater 3 outer wall side installation has combustion machine 5, combustion machine 5 is responsible for the fuel and preheated air according to the appropriate ratio of mixed combustion, for the boiler 6 provides heat, combustion machine 5 output end fixed connection has boiler 6, boiler 6 is the equipment of high temperature flue gas, in its inside fuel combustion release energy, make water and other medium into steam or hot water for use, at the same time the high temperature flue gas carrying a large amount of waste heat, boiler 6 outer wall side installation has flue gas condensing waste heat recovery device 7, flue gas condensing waste heat recovery device 7 is one of the core components of the device, it uses special heat exchange structure, make high temperature flue gas and low temperature medium heat exchange, recover the sensible heat and latent heat in the flue gas, reduce the flue gas temperature, improve the energy utilization rate, the flue gas temperature can be reduced to a lower level, flue gas condensing waste heat recovery device 7 outer wall side installation has deep dehydration condenser 9, deep dehydration condenser 9 to the flue gas after preliminary waste heat recovery depth dehydration treatment, reduce the water content in the flue gas, prevent the corrosion of subsequent equipment, at the same time further recover the latent heat in the flue gas, boiler 6 adjacent side installation has circulating assembly, fan 1 and low nitrogen evaporation preheater 3 between installation has filter assembly; Filter assembly includes filter box 13, filter box 13 and fan 1 output end fixed connection, filter box 13 plays the role of containing and fixing filter components, filter box 13 inside sliding connection has fixed frame 16, fixed frame 16 is used for installing and fixing filter plate 17, the installation and disassembly of filter plate 17 are convenient, fixed frame 16 inside sliding connection has filter plate 17, filter plate 17 can effectively intercept the dust, particulate matter and other impurities in the air, prevent them from entering the subsequent equipment such as low nitrogen evaporation preheater 3 inside, protect the equipment and maintain its normal operation, filter box 13 inner wall installation has disassembly assembly;The disassembly assembly includes a telescopic rod 14. One end of the telescopic rod 14 is fixedly connected to the top of the inner wall of the filter box 13. The telescopic rod 14 provides guidance and support for the movement of the fixed frame 16, ensuring that the fixed frame 16 can slide smoothly within the filter box 13. A spring 15 is sleeved on the outer wall of the telescopic rod 14. The spring 15 can assist in popping out the fixed frame 16 when disassembling the filter plate 17, making it convenient for operators to remove the fixed frame 16 and filter plate 17 for cleaning or replacement. The other end of the telescopic rod 14 is fixedly connected to one side of the outer wall of the fixed frame 16. A rotating plate 18 is rotatably connected inside the filter box 13. The rotating plate 18 can control the airflow path within the filter box 13 to a certain extent. When the filter plate 17 needs to be replaced, rotating the rotating plate 18 can change the airflow direction to prevent impurities from entering the system. A fixed plate 19 is rotatably connected to the upper surface of the filter box 13. The fixed plate 19 is used to fix the position of the filter plate 17 and the fixed frame 16 during normal operation, preventing accidental movement and ensuring the stability of the filtration effect.

[0028] Reference Figure 1 - Figure 5 A connecting pipe 12 is fixedly connected to one side of the outer wall of filter box 13. One end of connecting pipe 12 is fixedly connected to the lower side of the outer wall of low-NOx evaporative preheater 3. Low-NOx evaporative preheater 3 and burner 5 are connected by connecting pipe 24. Flue gas condensing waste heat recovery unit 7 and deep dehydration condenser 9 are connected by connecting pipe 38. A flue gas exhaust pipe 10 is fixedly connected to one side of the outer wall of deep dehydration condenser 9. A fixed cover 25 is slidably connected to the upper surface of flue gas condensing waste heat recovery unit 7. A fixed component is installed on the upper surface of flue gas condensing waste heat recovery unit 7. The circulation component includes circulation pump 11. Circulation pump 11 is located on the side away from boiler 6. The output end of circulation pump 11 is connected to low-NOx evaporative preheater 3. The input end of circulation pump 11 is connected to deep dehydration condenser 9. Circulation pump 22 is fixedly connected to the side away from circulation pump 11. The output end of circulation pump 212 is connected to deep dehydration condenser 9. Circulation pump 212 outputs... The inlet is connected to the low-NOx evaporation preheater 3; the fixing assembly includes a fixing column 20, the lower end of which is fixedly connected to the upper surface of the flue gas condensation waste heat recovery unit 7, a spring 23 is slidably connected inside the fixing column 20, a locking block 24 is fixedly connected to one end of the spring 23, a support plate 26 is fixedly connected to the upper surface of the fixing cover 25, a stabilizing plate 27 is fixedly connected to the upper surface of the support plate 26, and an ejection assembly is installed on the upper surface of the flue gas condensation waste heat recovery unit 7; the ejection assembly includes a spring 21, the lower surface of which is fixedly connected to the upper surface of the flue gas condensation waste heat recovery unit 7, a collar 22 is fixedly connected to the upper surface of the spring 21, a locking plate 28 is fixedly connected to one side of the outer wall of the support plate 26; the inner wall of the stabilizing plate 27 is slidably connected to the outer wall of the fixing column 20, and the stabilizing plate 27 is set on the lower surface of the locking block 24; the inner wall of the locking plate 28 is slidably connected to the outer wall of the fixing column 20, and the lower surface of the locking plate 28 is in contact with the upper surface of the collar 22;

[0029] Specifically, the outer wall of the filter box 13 is fixedly connected with a connecting pipe 2 on one side, which plays a role in conveying air, and the clean air filtered by the filter box 13 is transmitted from the filter box 13 to the low-nitrogen evaporation preheater 3, so as to ensure that the air entering the low-nitrogen evaporation preheater 3 does not contain impurities, which is conducive to the subsequent heat exchange and combustion process. One end of the connecting pipe 2 is fixedly connected to the lower side of the outer wall of the low-nitrogen evaporation preheater 3, and the low-nitrogen evaporation preheater 3 is connected with the combustion machine 5 through a connecting pipe 4, which is responsible for accurately conveying the air preheated in the low-nitrogen evaporation preheater 3 to the combustion machine 5, so that the preheated air can participate in the combustion reaction in time, ensuring the efficiency and stability of the combustion, and at the same time helping to achieve the effect of low-nitrogen combustion. The flue gas condensing waste heat recovery device 7 is connected with the deep dehydration condenser 9 through a connecting pipe 8, which enables the flue gas preliminarily treated by the flue gas condensing waste heat recovery device 7 to flow smoothly to the deep dehydration condenser 9, so as to further perform deep dehydration and waste heat recovery treatment, improve the waste heat recovery efficiency and flue gas purification degree of the whole system, and the outer wall of the deep dehydration condenser 9 is fixedly connected with an exhaust pipe 10 on one side, which provides a discharge channel for the low-temperature and low-moisture flue gas after deep treatment, and safely discharges it into the atmosphere, reducing the thermal pollution and pollution discharge to the environment. The upper surface of the flue gas condensing waste heat recovery device 7 is slidably connected with a fixed cover 25, which can protect the upper part of the flue gas condensing waste heat recovery device 7, prevent foreign matters from entering the equipment and affecting its normal operation, and at the same time may play a certain heat preservation role to reduce heat loss. The upper surface of the flue gas condensing waste heat recovery device 7 is provided with a fixing assembly.The circulating assembly comprises a circulating pump 11 arranged on the far side of the boiler 6, and the circulating pump 11 is mainly used to provide power to drive the medium to flow in a specific circulating loop. The output end of the circulating pump 11 is connected with the low-nitrogen evaporation preheater 3, so that the treated medium can be delivered into the low-nitrogen evaporation preheater 3 to participate in the heat exchange process and absorb the waste heat of flue gas, thereby realizing the recycling of energy. The input end of the circulating pump 11 is connected with the deep dewatering condenser 9, so that the medium after heat exchange in the low-nitrogen evaporation preheater 3 can be drawn back to the system for recycling, so that the heat carried by the medium can be repeatedly utilized. The far side of the circulating pump 11 is fixedly connected with a circulating pump 12, and the circulating pump 12 also provides power to drive the medium to circulate, and cooperates with the circulating pump 11 to form a complete medium circulating system, so that the heat in the system can be effectively transferred and distributed to each required part. The output end of the circulating pump 12 is connected with the deep dewatering condenser 9, so that the medium from the low-nitrogen evaporation preheater 3 can be further delivered into the deep dewatering condenser 9 for possible further heat exchange or other treatment process. The input end of the circulating pump 12 is connected with the low-nitrogen evaporation preheater 3, so that the medium treated in the deep dewatering condenser 9 can be delivered back to the low-nitrogen evaporation preheater 3, thereby forming a continuous circulating flow path. The fixed assembly comprises a fixed column 20 fixedly connected to the upper surface of the flue gas condensation waste heat recovery device 7, which provides a support basis for the installation and fixation of the fixed cover 25 and ensures that the fixed cover 25 can stably stay in a suitable position during the operation of the equipment. The fixed column 20 is slidably connected with a spring 23, and one end of the spring 23 is fixedly connected with a clamping block 24. The spring 23 can provide a certain elastic force when the fixed cover 25 is installed, so that the clamping block 24 can better cooperate with the corresponding structure on the fixed cover 25, thereby realizing the reliable fixation of the fixed cover 25. When the fixed cover 25 needs to be disassembled, the spring 23 can also buffer the movement of the clamping block 24 to some extent, thereby facilitating the operation. The upper surface of the fixed cover 25 is fixedly connected with a support plate 26, which is used to enhance the structural strength of the fixed cover 25 and provide an installation basis for other components, so that the fixed cover 25 and its related components can remain stable when subjected to external force. The upper surface of the support plate 26 is fixedly connected with a stabilizing plate 27, which not only further enhances the overall stability of the fixed cover 25, but also plays a role in positioning and auxiliary fixation during the installation and fixation of the fixed cover 25, thereby ensuring the accurate connection of the fixed cover 25 with the flue gas condensation waste heat recovery device 7 and preventing the fixed cover 25 from shaking or shifting during the operation of the equipment. The flue gas condensation waste heat recovery device 7 is provided with a pushing-out assembly.The push-out assembly comprises spring two 21, the lower surface of which is fixedly connected to the upper surface of the flue gas condensing waste heat recovery device 7, the upper surface of spring two 21 is fixedly connected with a collar 22, spring two 21 provides upward elastic force for the collar 22, when the fixed cover 25 is disassembled, through the interaction between the clamping plate 28 and the collar 22, the fixed cover 25 can be pushed out a certain distance upward, which facilitates the disassembly operation of the operator, reduces the difficulty of manual operation, the outer wall of the support plate 26 is fixedly connected with the clamping plate 28 on one side, the clamping plate 28 plays a key role in the installation and disassembly process of the fixed cover 25, it cooperates with the fixed column 20 and related structures to realize fixation during installation, and interacts with the collar 22 during disassembly to trigger the elastic force release of spring two 21, push the fixed cover 25 to move upward, the inner wall of the stabilizing plate 27 is slidingly connected to the outer wall of the fixed column 20, the stabilizing plate 27 is arranged on the lower surface of the clamping block 24, in the fixed state of the fixed cover 25, the stabilizing plate 27 can prevent the clamping block 24 from accidentally popping out, ensure the reliability of fixation, at the same time, the sliding connection mode of the stabilizing plate 27 and the fixed column 20 also facilitates the installation and disassembly operation of the fixed cover 25, the inner wall of the clamping plate 28 is slidingly connected to the outer wall of the fixed column 20, the lower surface of the clamping plate 28 is in close contact with the upper surface of the collar 22, this structure design makes the downward movement of the clamping plate 28 can accurately transfer force to the collar 22 when the fixed cover 25 is disassembled, so as to start the push-out action of spring two 21.

[0030] Working principle: when the device is needed, first open the fan 1, at this time through the fan 1 will be transmitted to the inside of the filter box 13, at this time again through the filter plate 17 is filtered, and then through the connecting pipe one 2 is transmitted to the inside of the low nitrogen evaporation preheater 3 for use, and then enters the combustion engine 5 into the boiler 6 combustion, the flue gas discharged by the boiler 6 enters the condensing waste heat recovery device 7 to reduce the temperature of the flue gas to below 80 degrees, then the flue gas is dehydrated by the deep condenser 9 to reduce the temperature of the flue gas to 20 to 40 degrees, and then discharged to the atmosphere, the condensate produced by the deep dehydration condenser 9 is used for the water required by the low nitrogen evaporation preheater 3, and the excess water is discharged, because the ratio of air combustion is 12 / 13, if the basic temperature of air is increased, the heat required to reach the final temperature is less; humidifying air can increase the specific heat capacity of air, so that the heat of air is increased, but at the same time, humidifying air also reduces the oxygen content in air, so that the oxygen content in the reaction equation of nitrogen oxide formed by nitrogen and oxygen at 1250 degrees is reduced, so that the nitrogen oxide is reduced, and the nitrogen oxide will be dissolved in part with water vapor at high temperature, so that the nitrogen oxide is reduced, when the filter plate 17 is used for a long time, the fixed plate 19 is separated from the upper side of the rotating plate 18 by rotating, at this time, the filter plate 17 is pulled out from the inside of the filter box 13 by the reaction force of the spring one 15, so that the effect of quickly replacing the filter plate 17 is realized, at the same time, the clamping plate 28 is pushed up by the reaction force of the spring two 21 by pressing the clamping block 24, so that the effect of quickly cleaning the parts in the fixed cover 25 is realized, and the effect of preventing too much impurities from remaining in the fixed cover 25 is realized.

[0031] Although the embodiments and drawings of the present application are disclosed for the purpose of illustration, those skilled in the art can understand that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present application and the appended claims, therefore, the scope of the present application is not limited to the disclosed content of the embodiments and drawings.

Claims

1. A low-nitrogen energy-saving flue gas condensing waste heat recovery device, comprising a connecting pipe one (2), characterized in that: One side of the connecting pipe (2) is fixedly connected with the fan (1), the other end of the connecting pipe (2) is fixedly connected with the low-nitrogen evaporation preheater (3), the low-nitrogen evaporation preheater (3) is provided with the combustion machine (5) on one side of the outer wall, the output end of the combustion machine (5) is fixedly connected with the boiler (6), the outer wall of the boiler (6) is provided with the flue gas condensing waste heat recovery device (7) on one side, the flue gas condensing waste heat recovery device (7) is provided with the deep dehydration condenser (9) on one side of the outer wall, the adjacent side of the boiler (6) is provided with the circulating assembly, the filter assembly is arranged between the fan (1) and the low-nitrogen evaporation preheater (3). The filter assembly comprises a filter box (13), the filter box (13) is fixedly connected with the output end of the fan (1), the filter box (13) is slidably connected with a fixed frame (16) inside, the fixed frame (16) is slidably connected with a filter plate (17) inside, and the filter box (13) is provided with a disassembly assembly on the inner wall.

2. The low-nitrogen energy-saving flue gas condensing waste heat recovery device according to claim 1, characterized in that: The disassembly assembly comprises a telescopic rod (14), one end of the telescopic rod (14) is fixedly connected with the inner wall top of the filter box (13), the outer wall of the telescopic rod (14) is sleeved with a spring (15), the other end of the telescopic rod (14) is fixedly connected with one side of the outer wall of the fixed frame (16), the filter box (13) is rotatably connected with a rotating plate (18) inside, and the upper surface of the filter box (13) is rotatably connected with a fixed plate (19).

3. The low-nitrogen and energy-saving flue gas condensing waste heat recovery device according to claim 2, characterized in that: One side of the outer wall of the filter box (13) is fixedly connected with the connecting pipe (2), one end of the connecting pipe (2) is fixedly connected with the lower side of the outer wall of the low-nitrogen evaporation preheater (3), the low-nitrogen evaporation preheater (3) is connected with the combustion machine (5) through the connecting pipe (4), the flue gas condensing waste heat recovery device (7) and the deep dehydration condenser (9) are connected through the connecting pipe (8), one side of the outer wall of the deep dehydration condenser (9) is fixedly connected with the smoke exhaust pipe (10), the upper surface of the flue gas condensing waste heat recovery device (7) is slidably connected with a fixed cover (25), and the flue gas condensing waste heat recovery device (7) is provided with a fixing assembly on the upper surface.

4. The low-nitrogen and energy-saving flue gas condensing waste heat recovery device according to claim 3, characterized in that: The circulating assembly comprises a circulating pump one (11), the circulating pump one (11) is arranged on the side away from the boiler (6), the output end of the circulating pump one (11) is connected with the low-nitrogen evaporation preheater (3), the input end of the circulating pump one (11) is connected with the deep dehydration condenser (9), the side away from the circulating pump one (11) is fixedly connected with a circulating pump two (12), the output end of the circulating pump two (12) is connected with the deep dehydration condenser (9), and the input end of the circulating pump two (12) is connected with the low-nitrogen evaporation preheater (3).

5. The low nitrogen and energy-saving flue gas condensing waste heat recovery device according to claim 4, characterized in that: The fixed assembly includes a fixed column (20), the lower end of the fixed column (20) is fixedly connected to the upper surface of the flue gas condensing waste heat recovery device (7), the inside of the fixed column (20) is slidably connected with a spring three (23), one end of the spring three (23) is fixedly connected with a clamping block (24), the upper surface of the fixed cover (25) is fixedly connected with a supporting plate (26), the upper surface of the supporting plate (26) is fixedly connected with a stabilizing plate (27), and the upper surface of the flue gas condensing waste heat recovery device (7) is provided with a pushing-out assembly.

6. The low nitrogen and energy-saving flue gas condensing waste heat recovery device according to claim 5, characterized in that: The pushing-out assembly includes a spring two (21), the lower surface of the spring two (21) is fixedly connected to the upper surface of the flue gas condensing waste heat recovery device (7), the upper surface of the spring two (21) is fixedly connected with a sleeve ring (22), and one side of the outer wall of the supporting plate (26) is fixedly connected with a clamping plate (28).

7. The low nitrogen and energy-saving flue gas condensing waste heat recovery device according to claim 6, characterized in that: The inner wall of the stabilizing plate (27) is slidably connected to the outer wall of the fixed column (20), and the stabilizing plate (27) is arranged on the lower surface of the clamping block (24).

8. The low nitrogen and energy-saving flue gas condensing waste heat recovery device according to claim 7, characterized in that: The inner wall of the clamping plate (28) is slidably connected to the outer wall of the fixed column (20), and the lower surface of the clamping plate (28) is attached to the upper surface of the sleeve ring (22).

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