A waste heat recovery and flue gas purification coupling device

Abstract

This application relates to the field of industrial flue gas treatment technology and discloses a waste heat recovery and flue gas purification coupling device, including a desulfurization tower. An installation frame is fixedly installed on the inner wall of the desulfurization tower, and a low-temperature heat exchanger is fixedly installed on the inner wall of the installation frame. An installation plate is fixedly installed on the outer surface of the desulfurization tower. This waste heat recovery and flue gas purification coupling device, by setting up components such as a low-temperature heat exchanger, a threaded rod, a slider, and a nozzle, allows for air compression when particulate matter accumulates on the surface of the low-temperature heat exchanger. Air is delivered through a hose and connecting pipe and sprayed out through the nozzle. Simultaneously, a motor is started to rotate the threaded rod, which in turn moves the slider, which in turn moves the connecting pipe and the nozzle. This allows for air blowing on the surface of the low-temperature heat exchanger, removing the accumulated particulate matter and preventing it from affecting airflow and thus reducing the heat exchange efficiency of the low-temperature heat exchanger.

Description

Technical Field

[0001] This application relates to the field of industrial flue gas treatment technology, specifically a waste heat recovery and flue gas purification coupling device. Background Technology

[0002] Industrial flue gas treatment technology has developed rapidly in recent years, especially the purification processes for pollutants such as sulfur dioxide and nitrogen oxides have become increasingly mature. At the same time, waste heat recovery technology has been widely used in the field of industrial energy conservation, such as recovering the heat of high-temperature flue gas through heat exchangers for preheating combustion air or production water.

[0003] An existing patent (publication number: CN211799921U) discloses an arrangement structure for adding a heat exchanger inside a desulfurization tower. The structure includes a desulfurization tower and a heat exchanger. Multiple through holes are formed on the outer walls of both sides of the top of the desulfurization tower, and connecting pipes are fixedly connected to the walls of these holes. Multiple support pipes are fixedly connected to the lower surface of the heat exchanger. Insert rods are movably connected to the inner walls of two symmetrical connecting pipes and the inner walls of adjacent support pipes. A first arc-shaped plate is fixedly connected to the side walls of the multiple insert rods. A second arc-shaped plate is movably fitted onto the walls of the multiple insert rods. Insert holes that mate with the multiple insert rods are formed on the outer wall of the second arc-shaped plate. Arc-shaped slots are formed on the walls of the multiple insert rods, and arc-shaped locking blocks are movably connected to the inner walls of the multiple arc-shaped slots. This invention effectively improves the efficiency of arranging and installing the heat exchanger in the desulfurization tower, reduces the labor intensity of workers, and improves the convenience of installation and operation.

[0004] However, in the above-mentioned scheme, it was found that although heat recovery and utilization can be achieved at the same time by setting heat exchangers in the desulfurization tower, in actual use, due to the presence of particulate matter in the flue gas, the particulate matter will accumulate on the surface of the heat exchanger after long-term use. The accumulated particulate matter will affect the air flow and the heat exchange efficiency of the heat exchanger. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a waste heat recovery and flue gas purification coupling device, which has the advantages of blowing air onto the surface of a low-temperature heat exchanger to remove particulate matter from the surface of the low-temperature heat exchanger, preventing the accumulated particulate matter from affecting airflow and heat exchange efficiency. This solves the problem that in existing technologies, after long-term use, particulate matter in the flue gas will accumulate on the surface of the heat exchanger, affecting airflow and heat exchange efficiency.

[0006] To achieve the above objectives, this application provides the following technical solution: a waste heat recovery and flue gas purification coupling device, comprising a desulfurization tower, an installation frame fixedly installed on the inner wall of the desulfurization tower, a low-temperature heat exchanger fixedly installed on the inner wall of the installation frame, an installation plate fixedly installed on the outer surface of the desulfurization tower, an air compressor fixedly installed on the upper surface of the installation plate, a hose fixedly installed at the output end of the air compressor, a connecting pipe fixedly connected to the other end of the hose, nozzles arranged at equal intervals fixedly installed on the outer surface of the connecting pipe, a crossbar fixedly connected to the front of the low-temperature heat exchanger, a motor fixedly connected to the right side of the crossbar, a threaded rod fixedly connected to the output shaft of the motor, the outer surface of the threaded rod rotatably connected to the inner wall of the crossbar, a slider threadedly connected to the outer surface of the threaded rod, the outer surface of the slider slidably connected to the inner wall of the crossbar, and the back of the slider fixedly connected to the front of the connecting pipe.

[0007] The above scheme facilitates the blowing of air onto the surface of the low-temperature heat exchanger inside the desulfurization tower to remove particulate matter and prevent accumulated particles from affecting airflow and heat exchange efficiency. An installation frame is installed inside the desulfurization tower, and the low-temperature heat exchanger is mounted on the inner wall of the frame. An air compressor and hose are connected to the frame, allowing air to be compressed, delivered through the hose to the connecting pipe, and finally sprayed out through a nozzle. A crossbar is installed on the front of the low-temperature heat exchanger, and a motor is connected to a threaded rod. When blowing air is needed to remove particulate matter from the surface of the heat exchanger, the motor is started, causing the threaded rod to rotate. This causes a slider to slide on the inner wall of the crossbar, moving the connecting pipe and the nozzle to achieve the blowing effect on the surface of the low-temperature heat exchanger, effectively removing particulate matter and preventing it from affecting airflow and heat exchange efficiency.

[0008] Furthermore, a pipe is fixedly installed at the output end of the low-temperature heat exchanger, and the outer surface of the pipe is fixedly connected to the inner wall of the desulfurization tower.

[0009] The above method involves installing pipe one at the output end of the low-temperature heat exchanger and connecting the surface of pipe one to the desulfurization tower, thus achieving the installation of pipe one.

[0010] Furthermore, an air preheater is fixedly connected to the other end of the first pipe, and a support frame is fixedly installed on the outer surface of the air preheater.

[0011] The above scheme connects the other end of pipe one to the air preheater. The air preheater and the low-temperature heat exchanger work together to preheat the combustion air. The support frame is installed on the outer surface of the air preheater to support the air preheater.

[0012] Furthermore, a second pipe is fixedly connected to the upper surface of the desulfurization tower, and a flow meter is fixedly installed on the inner wall of the second pipe.

[0013] With the above scheme, pipe 2 is installed on the upper surface of the desulfurization tower, and a flow meter is installed on the inner wall of pipe 2. Pipe 2 facilitates the transfer of flue gas to the downstream device, and the flow meter facilitates the detection of the flow rate of flue gas passing through pipe 2.

[0014] Furthermore, a dust collector is fixedly installed at the other end of the second pipe, and an exhaust pipe is fixedly installed at the output end of the dust collector.

[0015] With the above scheme, the dust collector is installed at the other end of the second pipeline. The dust collector facilitates the separation of solid and gas in the cooled flue gas, allowing particulate matter to be discharged through the dust collector's outlet, and the dust-removed gas to be discharged through the exhaust pipe.

[0016] Furthermore, two swirl plates are fixedly installed on the inner wall of the desulfurization tower, and a spray assembly is provided on the inner wall of the desulfurization tower.

[0017] The above scheme involves installing swirl plates on the inner wall of the desulfurization tower to increase the residence time of flue gas in the tower and improve desulfurization efficiency. A spray assembly, including a delivery pipe and nozzles, is also installed to ensure uniform spraying of the desulfurizing agent.

[0018] Furthermore, a high-temperature heat exchanger is fixedly installed on the outer surface of the desulfurization tower via a pipe, and an air inlet pipe is fixedly installed on the left side of the high-temperature heat exchanger.

[0019] The above scheme connects the high-temperature heat exchanger to the desulfurization tower via a pipeline, facilitating the entry of flue gas into the desulfurization tower. The inlet pipe is installed on the left side of the high-temperature heat exchanger, through which the flue gas enters the high-temperature heat exchanger. The high-temperature heat exchanger facilitates the transfer of most of the heat from the flue gas. The cooled flue gas then enters the desulfurization tower for purification through the pipeline at the right end of the high-temperature heat exchanger.

[0020] Furthermore, a pipe three is fixedly installed at the output end of the high-temperature heat exchanger, a temperature sensor is fixedly installed on the inner wall of the pipe three, and the other end of the pipe three is fixedly connected to a desulfurizing agent preheating tank.

[0021] With the above scheme, pipe three is installed at the output end of the high-temperature heat exchanger, and a temperature sensor is installed inside pipe three. The temperature sensor facilitates the detection of the temperature inside pipe three. A desulfurizing agent preheating tank is installed at the other end of pipe three, so that the high-temperature heat exchanger and the desulfurizing agent preheating tank can work together to preheat the desulfurizing agent.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] This waste heat recovery and flue gas purification coupling device, through the installation of components such as a low-temperature heat exchanger, a threaded rod, a slider, and nozzles, allows for the blowing of air onto the surface of the low-temperature heat exchanger when particulate matter accumulates. The compressed air is delivered through hoses and connecting pipes and sprayed through the nozzles. Simultaneously, a motor is activated to rotate the threaded rod, which in turn moves the slider, which in turn moves the connecting pipes and nozzles. This process effectively blows air away from the surface of the low-temperature heat exchanger, preventing the accumulated particles from obstructing airflow and reducing the heat exchange efficiency. First, the flue gas is cooled by a high-temperature heat exchanger, and then preheated with the desulfurizing agent preheating tank in conjunction with the pipeline. Simultaneously, the low-temperature waste heat from the purification process is recovered by the low-temperature heat exchanger installed on the inner wall of the desulfurization tower and used to preheat the combustion air, thus reducing energy consumption. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the entire application;

[0025] Figure 2 This is the overall main view structure diagram of this application;

[0026] Figure 3 This is a structural diagram showing the connection relationship between pipeline 3 and the desulfurizing agent preheating tank in this application;

[0027] Figure 4 This is a structural diagram showing the connection relationship between pipe three and the temperature sensor in this application;

[0028] Figure 5 This is a structural diagram showing the connection relationship between pipe 2 and the flow meter in this application;

[0029] Figure 6 This is a diagram of the internal structure of the desulfurization tower in this application;

[0030] Figure 7 This is a structural diagram showing the connection relationship between the threaded rod and the slider in this application.

[0031] In the picture:

[0032] 1. Desulfurization tower; 2. Mounting frame; 3. Low-temperature heat exchanger; 4. Mounting plate; 5. Air compressor; 6. Hoses; 7. Crossbar; 8. Motor; 9. Threaded rod; 10. Slider; 11. Connecting pipe; 12. Nozzle; 13. Pipe 1; 14. Air preheater; 15. Support frame; 16. Pipe 2; 17. Flow meter; 18. Dust collector; 19. Exhaust pipe; 20. Swirl plate; 21. Spray assembly; 22. High-temperature heat exchanger; 23. Inlet pipe; 24. Pipe 3; 25. Desulfurizing agent preheating tank; 26. Temperature sensor. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] Please see Figure 6 and Figure 7 This embodiment of a waste heat recovery and flue gas purification coupling device includes a desulfurization tower 1. A mounting frame 2 is fixedly installed on the inner wall of the desulfurization tower 1. A low-temperature heat exchanger 3 is fixedly installed on the inner wall of the mounting frame 2. A mounting plate 4 is fixedly installed on the outer surface of the desulfurization tower 1. An air compressor 5 is fixedly installed on the upper surface of the mounting plate 4. A hose 6 is fixedly installed at the output end of the air compressor 5. A connecting pipe 11 is fixedly connected to the other end of the hose 6. Spray nozzles 12 arranged at equal intervals are fixedly installed on the outer surface of the connecting pipe 11. A crossbar 7 is fixedly connected to the front of the low-temperature heat exchanger 3. A motor 8 is fixedly connected to the right side of the crossbar 7. A threaded rod 9 is fixedly connected to the output shaft of the motor 8. The outer surface of the threaded rod 9 is rotatably connected to the inner wall of the crossbar 7. A slider 10 is threadedly connected to the outer surface of the threaded rod 9. The outer surface of the slider 10 is slidably connected to the inner wall of the crossbar 7. The back of the slider 10 is fixedly connected to the front of the connecting pipe 11.

[0035] Please see Figure 3 , Figure 5 and Figure 6 Pipe 13 is fixedly installed at the output end of the low-temperature heat exchanger 3. The outer surface of pipe 13 is fixedly connected to the inner wall of the desulfurization tower 1. Pipe 13 is installed at the output end of the low-temperature heat exchanger 3 and the surface of pipe 13 is connected to the desulfurization tower 1 to realize the installation of pipe 13.

[0036] Please see Figure 1 , Figure 2 and Figure 3 The other end of pipe 13 is fixedly connected to air preheater 14. A support frame 15 is fixedly installed on the outer surface of air preheater 14. The other end of pipe 13 is connected to air preheater 14. Air preheater 14 and low temperature heat exchanger 3 are used to preheat combustion air. The support frame 15 is installed on the outer surface of air preheater 14 to achieve the support effect of air preheater 14.

[0037] Please see Figure 1 , Figure 3 and Figure 5The upper surface of the desulfurization tower 1 is fixedly connected to a pipe 2 16, and a flow meter 17 is fixedly installed on the inner wall of the pipe 2 16. The pipe 2 16 is installed on the upper surface of the desulfurization tower 1, and the flow meter 17 is installed on the inner wall of the pipe 2 16. The flue gas is easily transmitted to the downstream device through the pipe 2 16, and the flow meter 17 is used to detect the flow rate of the flue gas passing through the pipe 2 16.

[0038] Please see Figure 3 and Figure 5 A dust collector 18 is fixedly installed at the other end of the second pipe 16. An exhaust pipe 19 is fixedly installed at the output end of the dust collector 18. The dust collector 18 is installed at the other end of the second pipe 16. The dust collector 18 facilitates the separation of solid and gas in the cooled flue gas, so that the particulate matter is discharged through the discharge port of the dust collector 18, and the dust-removed gas is discharged through the exhaust pipe 19.

[0039] Please see Figure 2 and Figure 6 Two swirl plates 20 are fixedly installed on the inner wall of the desulfurization tower 1. A spray assembly 21 is provided on the inner wall of the desulfurization tower 1. The installation of the swirl plates 20 on the inner wall of the desulfurization tower 1 can increase the residence time of flue gas in the desulfurization tower 1 and improve the desulfurization efficiency. The spray assembly 21 includes a conveying pipe and a nozzle to ensure that the desulfurizing agent is sprayed evenly.

[0040] Please see Figure 1 , Figure 2 and Figure 3 A high-temperature heat exchanger 22 is fixedly installed on the outer surface of the desulfurization tower 1 via a pipe. An air inlet pipe 23 is fixedly installed on the left side of the high-temperature heat exchanger 22. The high-temperature heat exchanger 22 is connected to the desulfurization tower 1 via a pipe to facilitate the entry of flue gas into the desulfurization tower 1. The air inlet pipe 23 is installed on the left side of the high-temperature heat exchanger 22. The flue gas enters the high-temperature heat exchanger 22 through the air inlet pipe 23. The high-temperature heat exchanger 22 facilitates the transfer of most of the heat from the flue gas. The cooled flue gas enters the desulfurization tower 1 through the pipe at the right end of the high-temperature heat exchanger 22 for purification treatment.

[0041] Please see Figure 1 , Figure 3 and Figure 4 A pipe 24 is fixedly installed at the output end of the high-temperature heat exchanger 22. A temperature sensor 26 is fixedly installed on the inner wall of the pipe 24. The other end of the pipe 24 is fixedly connected to a desulfurizing agent preheating tank 25. The pipe 24 is installed at the output end of the high-temperature heat exchanger 22, and the temperature sensor 26 is installed inside the pipe 24. The temperature sensor 26 facilitates the detection of the temperature inside the pipe 24. The desulfurizing agent preheating tank 25 is installed at the other end of the pipe 24, so that the cooperation between the high-temperature heat exchanger 22 and the desulfurizing agent preheating tank 25 can preheat the desulfurizing agent.

[0042] This embodiment of a waste heat recovery and flue gas purification coupling device includes components such as a low-temperature heat exchanger 3, a threaded rod 9, a slider 10, and a nozzle 12. When particulate matter accumulates on the surface of the low-temperature heat exchanger 3, an air compressor 5 is activated to compress air, which is then transported through a hose 6 and a connecting pipe 11 and sprayed out through the nozzle 12. Simultaneously, a motor 8 is activated to rotate the threaded rod 9, which in turn moves the slider 10. The slider 10 then moves the connecting pipe 11 and the nozzle 12, thus blowing air onto the surface of the low-temperature heat exchanger 3 to remove the particulate matter and prevent it from affecting airflow and heat exchange efficiency. First, the flue gas is cooled by a high-temperature heat exchanger 22, and then preheated with the desulfurizing agent by working in conjunction with the pipe 24 and the desulfurizing agent preheating tank 25. At the same time, the low-temperature waste heat from the purification process is recovered by the low-temperature heat exchanger 3 installed on the inner wall of the desulfurization tower 1 and used to preheat the combustion air, thereby reducing energy consumption.

[0043] It should be noted that the low-temperature heat exchanger 3 adopts a plate-fin heat exchanger, which can exchange the waste heat in the flue gas; the hose 6 is made of high-pressure resistant and wear-resistant rubber material; the motor 8 adopts a servo motor, which can realize the forward and reverse rotation of the threaded rod 9; and the high-temperature heat exchanger 22 adopts a heat pipe heat exchanger, which is used to exchange and remove most of the heat in the flue gas in the early stage.

[0044] The working principle of the above embodiments is as follows:

[0045] First, during operation, flue gas enters the high-temperature heat exchanger 22 through the inlet pipe 23. The high-temperature heat exchanger 22 cools the flue gas, and the heat is transferred to the desulfurizing agent preheating tank 25 to preheat the desulfurizing agent. The cooled flue gas then enters the desulfurization tower 1 through the pipe at the right end of the high-temperature heat exchanger 22 for purification. The swirl plate 20 increases the residence time of the flue gas in the desulfurization tower 1, improving desulfurization efficiency. The spray assembly 21 ensures uniform spraying of the desulfurizing agent. Simultaneously, the low-temperature waste heat from the purification process is recovered by the low-temperature heat exchanger 3 installed on the inner wall of the desulfurization tower 1 and conducted to the air preheater 14 through pipe 13. In the process of preheating combustion air, when particulate matter accumulates on the surface of the low-temperature heat exchanger 3, the air compressor 5 is started to compress the air, which is then delivered through the hose 6 and connecting pipe 11 and sprayed out through the nozzle 12. At the same time, the motor 8 is started to rotate the threaded rod 9. The rotation of the threaded rod 9 causes the slider 10 to slide on the inner wall of the crossbar 7, which in turn causes the slider 10 to drive the connecting pipe 11 and the nozzle 12 to move. This allows for air blowing on the surface of the low-temperature heat exchanger 3, which can blow away the particulate matter on the surface of the low-temperature heat exchanger 3, prevent the accumulated particulate matter from affecting the airflow, and prevent the heat exchange efficiency of the low-temperature heat exchanger 3 from being affected.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery and flue gas purification coupling device, comprising a desulfurization tower (1), characterized in that: A mounting bracket (2) is fixedly installed on the inner wall of the desulfurization tower (1). A low-temperature heat exchanger (3) is fixedly installed on the inner wall of the mounting bracket (2). A mounting plate (4) is fixedly installed on the outer surface of the desulfurization tower (1). An air compressor (5) is fixedly installed on the upper surface of the mounting plate (4). A hose (6) is fixedly installed at the output end of the air compressor (5). A connecting pipe (11) is fixedly connected to the other end of the hose (6). A nozzle (1) arranged at equal intervals is fixedly installed on the outer surface of the connecting pipe (11). 2) A crossbar (7) is fixedly connected to the front of the low-temperature heat exchanger (3). A motor (8) is fixedly connected to the right side of the crossbar (7). A threaded rod (9) is fixedly connected to the output shaft of the motor (8). The outer surface of the threaded rod (9) is rotatably connected to the inner wall of the crossbar (7). A slider (10) is threadedly connected to the outer surface of the threaded rod (9). The outer surface of the slider (10) is slidably connected to the inner wall of the crossbar (7). The back of the slider (10) is fixedly connected to the front of the connecting pipe (11).

2. The waste heat recovery and flue gas purification coupling device according to claim 1, characterized in that: The output end of the low-temperature heat exchanger (3) is fixedly installed with a pipe (13), and the outer surface of the pipe (13) is fixedly connected to the inner wall of the desulfurization tower (1).

3. The waste heat recovery and flue gas purification coupling device according to claim 2, characterized in that: The other end of the pipe (13) is fixedly connected to an air preheater (14), and a support frame (15) is fixedly installed on the outer surface of the air preheater (14).

4. The waste heat recovery and flue gas purification coupling device according to claim 1, characterized in that: The upper surface of the desulfurization tower (1) is fixedly connected to a pipe two (16), and a flow meter (17) is fixedly installed on the inner wall of the pipe two (16).

5. The waste heat recovery and flue gas purification coupling device according to claim 4, characterized in that: A dust collector (18) is fixedly installed at the other end of the second pipe (16), and an exhaust pipe (19) is fixedly installed at the output end of the dust collector (18).

6. The waste heat recovery and flue gas purification coupling device according to claim 1, characterized in that: The inner wall of the desulfurization tower (1) is fixedly installed with two swirl plates (20), and the inner wall of the desulfurization tower (1) is provided with a spray assembly (21).

7. The waste heat recovery and flue gas purification coupling device according to claim 1, characterized in that: A high-temperature heat exchanger (22) is fixedly installed on the outer surface of the desulfurization tower (1) through a pipe, and an air inlet pipe (23) is fixedly installed on the left side of the high-temperature heat exchanger (22).

8. The waste heat recovery and flue gas purification coupling device according to claim 7, characterized in that: The output end of the high-temperature heat exchanger (22) is fixedly installed with a pipe three (24), and a temperature sensor (26) is fixedly installed on the inner wall of the pipe three (24). The other end of the pipe three (24) is fixedly connected to a desulfurizing agent preheating tank (25).

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