Air inlet pipeline of waste heat boiler

Abstract

The utility model relates to the technical field of waste heat boilers, and discloses a waste heat boiler air inlet pipeline which comprises a pipeline body, an inner core pipeline of the pipeline body is arranged in a continuous bulb shape, a cleaning assembly for scraping soot scaling on the inner wall of the pipeline body is arranged in the pipeline body, and a fixing shaft is coaxially and rotationally arranged in the pipeline body; the cleaning assembly comprises a sleeve which is arranged on the fixing shaft and is perpendicular to the axial direction of the fixing shaft, a scraping strip which is arranged in the sleeve in a sliding mode and a pressure exerting piece which is arranged on the sleeve and used for exerting pressure on the scraping strip, and the scraping strip abuts against the inner wall of the pipeline body all the time. The air inlet pipeline has the effect of improving the heat recovery efficiency and the air flow distribution uniformity of the air inlet pipeline.

Description

Technical Field

[0001] The present application relates to the technical field of waste heat boilers, and in particular to an air intake pipe of a waste heat boiler. Background Art

[0002] A waste heat boiler is a boiler that uses the waste heat from waste gas, waste materials or waste liquid in various industrial processes and the heat generated by the combustion of combustible materials to heat water to a certain working temperature. It has the advantages of high thermal efficiency, energy saving and environmental protection, and is widely used in many fields such as metallurgy, chemical industry, and building materials. The working principle of a waste heat boiler is to transfer the heat from waste heat sources such as waste gas to water through a heat exchanger, so that the water is heated and evaporated to generate steam for production or life use.

[0003] In the design and use of waste heat boilers, it is necessary to consider many aspects, such as the stable supply of waste heat resources, the selection and layout of heat exchangers, the circulation and treatment of water, the material selection and insulation of equipment and pipelines, and the safe operation and maintenance of boilers.

[0004] In the waste heat boiler system in the prior art, the air intake duct is mainly responsible for introducing the exhaust gas into the boiler for heat exchange. However, the traditional air intake duct design has certain shortcomings in terms of heat recovery efficiency and air flow distribution uniformity, which affects the overall performance of the waste heat boiler. Utility Model Content

[0005] In order to improve the heat recovery efficiency and airflow distribution uniformity of an air intake duct, the present application provides an air intake duct of a waste heat boiler.

[0006] The air inlet pipe of a waste heat boiler provided in this application adopts the following technical solution:

[0007] An air intake duct of a waste heat boiler comprises a duct body, an inner core duct of the duct body being arranged in a continuous bubble shape, a cleaning assembly for scraping off soot scale on the inner wall of the duct body being arranged inside the duct body, and a fixed shaft being coaxially rotatably arranged inside the duct body, the cleaning assembly comprising a sleeve axially arranged on the fixed shaft perpendicular to the fixed shaft, a scraper strip slidably arranged in the sleeve, and a pressure member arranged on the sleeve for applying pressure to the scraper strip, wherein the scraper strip always contacts the inner wall of the duct body.

[0008] By adopting the above technical solution, during the operation of the waste heat boiler, the inner wall of the air intake duct body has a spherical grid structure, so that the exhaust gas flows through the inside of the duct body to form many small vortices, thereby improving the uniformity of the air flow distribution in the air intake duct. When the waste heat boiler stops working, the fixed shaft is driven to rotate, and the rotation of the fixed shaft drives the scraper to rotate. Since the pressure exerted by the pressure member on the scraper to make the scraper contact the inner wall of the duct body, the scraper always slides with the inner wall of the duct body during the rotation of the fixed shaft, and scrapes off the soot scale on the inner wall of the duct body, thereby improving the dispersion effect of the air intake duct with a spherical grid structure during use, and then improving the heat recovery efficiency of the air intake duct.

[0009] Optionally, the pressure member is a compression spring, which is arranged between the scraper strip and the inner bottom wall of the sleeve. A stop block is arranged at the end of the scraper strip close to the inner bottom wall of the sleeve, and a stop block is arranged on the inner side wall of the inner bottom wall of the sleeve close to the opening. When the scraper strip slides to the extreme position in the direction away from the sleeve, the stop block is arranged to abut against the stop block.

[0010] By adopting the above technical solution, when the waste heat boiler stops working, the fixed shaft is driven to rotate, and the fixed shaft is continuously moved out of the air intake pipe. Since the compression spring always applies a pressure to the scraper to make the scraper press against the inner wall of the pipe body, the scraper can comprehensively clean the inner wall of the pipe body during the movement, thereby improving the cleaning effect of the scraper on the inner wall of the air intake pipe.

[0011] Optionally, a spiral guide plate is provided in the pipe body, and the spiral guide plate is coaxially arranged with the fixed shaft and wound around the fixed shaft. A support rod is provided at the end of the fixed shaft close to the feed point of the pipe body, and the support rod is perpendicular to the fixed shaft. Both ends of the support rod are commonly connected with a ring. A plug-in ring groove is provided on the side wall at the air inlet end of the pipe body corresponding to the ring, and the ring is plug-fitted with the plug-in ring groove.

[0012] By adopting the above technical solution, the setting of the spiral guide vane changes the movement trajectory and movement speed of the exhaust gas flowing through the intake duct, so that the exhaust gas generates vortex and shear force, thereby achieving effective mixing and dispersion, and further improving the uniformity of air flow distribution in the intake duct. In addition, the plug-in fit between the collar and the plug-in ring groove facilitates the replacement and cleaning of the spiral guide vane and the scraper strip.

[0013] Optionally, connecting flanges are provided on the outer walls of the air inlet and outlet ends of the pipeline body, and annular grooves are provided on opposite sides of the two connecting flanges, and sealing rings are inserted into the annular grooves.

[0014] By adopting the above technical solution, the setting of the connecting flange facilitates the installation of the air intake pipe, and the setting of the sealing ring facilitates improving the sealing degree of the air intake pipe after the air intake pipe is connected when installing the air intake pipe, reducing the possibility of heat loss from the connection, thereby improving the heat recovery efficiency of the air intake pipe.

[0015] Optionally, a filter frame is provided at the air outlet end of the pipeline body.

[0016] By adopting the above technical solution, the setting of the filter frame is used to reduce the possibility of larger dust particles in the exhaust gas entering the waste heat boiler and reduce the possibility of excessive ash accumulation inside the waste heat boiler, thereby improving the heat exchange efficiency of the waste heat boiler connected to the air intake duct.

[0017] Optionally, a limiting hole for the fixed shaft to pass through is opened on the filter frame, and the sleeve is arranged at a position close to the filter frame. A felt is arranged on the side of the sleeve facing the filter frame, and the felt is arranged to interfere with the filter frame.

[0018] By adopting the above technical solution, the end of the fixed shaft is inserted into the limiting hole on the filter frame, which can improve the stability of the connection between the fixed shaft and the filter frame, and the fixed shaft is rotated in the air intake duct. The rotating felt can clean the dust attached to the filter frame or even block the mesh, thereby improving the filtering effect of the filter frame.

[0019] Optionally, a plurality of limit blocks are arranged on the side wall of the air outlet end of the pipe body along the outer periphery of the filter frame, and the limit blocks all rotate toward the filter frame, and a torsion spring is sleeved on the rotating shaft of each limit block, and the filter frame is limited on the side wall of the pipe body.

[0020] By adopting the above technical solution, when installing the filter frame, it is only necessary to fit the filter frame to the side wall of the air outlet end of the pipe body, and flip the limit blocks one by one to clamp the filter frame between the limit blocks and the side wall of the air outlet end of the pipe body, so as to achieve the installation of the filter frame; conversely, the filter frame can be removed from the side wall of the air outlet end of the pipe body, and further cleaned and replaced, thereby improving the filtering effect of the air intake pipe on dust.

[0021] Optionally, the outer sheath of the pipe body is provided with a heat insulating sheath.

[0022] By adopting the above technical solution, an insulating sleeve is installed on the outside of the air inlet pipe, which can reduce heat loss and ensure that the gas entering the boiler maintains a high temperature, thereby improving the heat exchange efficiency.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. During the operation of the waste heat boiler, the inner wall of the air intake duct body has a spherical grid structure, so that many small vortices are formed when the exhaust gas flows through the inside of the duct body, thereby improving the uniformity of the air flow distribution in the air intake duct. When the waste heat boiler stops working, the fixed shaft is driven to rotate, and the rotation of the fixed shaft drives the scraper to rotate. Since the pressure applied by the pressure member to the scraper makes the scraper contact the inner wall of the duct body, the scraper always slides with the inner wall of the duct body during the rotation of the fixed shaft, and scrapes off the soot scale on the inner wall of the duct body, thereby improving the dispersion effect of the air intake duct with a spherical grid structure during use, and then improving the heat recovery efficiency of the air intake duct;

[0025] 2. When the waste heat boiler stops working, the fixed shaft is driven to rotate, and the fixed shaft is continuously moved out of the air intake pipe. Since the compression spring always applies a pressure to the scraper bar to make the scraper bar contact the inner wall of the pipe body, the scraper bar can fully clean the inner wall of the pipe body during the movement, thereby improving the cleaning effect of the scraper bar on the inner wall of the air intake pipe;

[0026] 3. The setting of the spiral guide vane changes the trajectory and speed of the exhaust gas flowing through the intake duct, causing the exhaust gas to generate vortex and shear force, thereby achieving effective mixing and dispersion, and further improving the uniformity of airflow distribution in the intake duct. In addition, the plug-in fit between the collar and the plug-in ring groove facilitates the replacement and cleaning of the spiral guide vane and the scraper strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0028] Figure 2 It is a cross-sectional view of the overall structure of an embodiment of the present application.

[0029] Figure 3 It is an exploded view showing the connection relationship between the collar and the air intake pipe in the embodiment of the present application.

[0030] Figure 4 yes Figure 2 Enlarged view of point A in the middle.

[0031] Description of reference numerals:

[0032] 1. Pipe body; 11. Plug-in ring groove; 12. Make way; 2. Cleaning assembly; 21. Sleeve; 211. Felt; 212. Block; 22. Scraper; 221. Stop block; 23. Pressure piece; 3. Insulation sleeve; 4. Connecting flange; 41. Annular groove; 42. Sealing ring; 5. Filter frame; 51. Limiting hole; 6. Limiting piece; 61. Limiting block; 62. Torsion spring; 7. Fixed shaft; 71. Support rod; 711. Ring; 8. Spiral guide vane. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-4 This application is described in further detail.

[0034] An embodiment of the present application discloses an air intake duct of a waste heat boiler.

[0035] Reference Figure 1 and Figure 2 An air intake pipe of a waste heat boiler includes a pipe body 1, the inner core pipe of the pipe body 1 is arranged in a continuous bubble shape, and a cleaning assembly 2 is arranged inside the pipe body 1, and an external fixed sleeve of the pipe body 1 is provided with an insulating sleeve 3, and connecting flanges 4 are integrally formed at both ends of the insulating sleeve 3 on the outer wall of the inlet and outlet ends of the pipe body 1, and an annular groove 41 is opened on the opposite sides of the two connecting flanges 4, and a sealing ring 42 is installed and inserted in the annular groove 41. A filter frame 5 is also arranged at the outlet end of the pipe body 1, and a limiter 6 is arranged on the side wall of the outlet end of the pipe body 1.

[0036] Reference Figure 1 and Figure 2 Before the working process of the waste heat boiler, the filter frame 5 is first installed on the side wall of the pipe body 1 at the air outlet end through the limiter 6, and then the air intake pipe is installed between the gas engine and the waste heat boiler through the connecting flange 4; during the working process of the waste heat boiler, the inner wall of the pipe body 1 has a spherical grid structure, so that the waste smoke flows through the inside of the pipe body 1. Many small vortices are formed, so that the smoke in the pipe body 1 is evenly distributed; after the waste heat boiler finishes working, the cleaning component 2 is used to scrape off the soot scale on the inner wall of the pipe body 1.

[0037] Reference Figure 2 and Figure 3 In order to further improve the uniformity of air flow distribution in the air intake duct, a fixed shaft 7 is coaxially rotatably arranged in the duct body 1, and a limiting hole 51 for the fixed shaft 7 to pass through is also provided on the filter frame 5. A spiral guide plate 8 is fixedly wound around the fixed shaft 7 in the axial direction, and a support rod 71 is fixedly provided at the end of the fixed shaft 7 near the feed of the duct body 1. The support rod 71 is perpendicular to the fixed shaft 7, and its center coincides with the end of the fixed shaft 7, and a collar 711 is connected to both ends of the support rod 71. A plug-in ring groove 11 is provided on the side wall at the air intake end of the duct body 1 corresponding to the collar 711, and the collar 711 is plugged and matched with the plug-in ring groove 11, and a clearance opening 12 is provided on the side wall at the air intake end of the duct body 1 to communicate with the plug-in ring groove 11, so that the operator can take the collar 711.

[0038] Reference Figure 2 and Figure 4The cleaning assembly 2 includes a sleeve 21, a scraper strip 22 and a pressure member 23. The sleeve 21 is fixedly arranged on the fixed shaft 7 perpendicular to the axial direction of the fixed shaft 7, and the sleeve 21 is located near the filter screen frame 5. A felt 211 is also fixedly arranged on the side wall of the sleeve 21 facing the filter screen frame 5, and the felt 211 is in contact with the filter screen frame 5.

[0039] Reference Figure 4 The scraper strip 22 is slidably arranged in the sleeve 21, and a stop block 221 is integrally formed at the end of the scraper strip 22 close to the inner bottom wall of the sleeve 21, and a stop block 212 is integrally formed on the inner side wall of the inner bottom wall of the sleeve 21 close to its own opening. When the scraper strip 22 slides to the extreme position in the direction away from the sleeve 21, the stop block 221 is arranged to abut against the stop block 212.

[0040] Reference Figure 4 The pressure member 23 in this embodiment is a compression spring, which is located in the sleeve 21 and abuts between the scraper strip 22 and the inner bottom wall of the sleeve 21. When the fixed shaft 7 is inserted into the pipe body 1, the scraper strip 22 always abuts against the inner wall of the pipe body 1.

[0041] Reference Figure 1 The limiting member 6 includes a plurality of limiting blocks 61 and torsion springs 62. In this embodiment, four limiting blocks 61 are used as an example. The four limiting blocks 61 are arranged along the outer periphery of the filter screen frame 5 and are hinged on the side wall of the air outlet end of the pipe body 1. Each limiting block 61 rotates toward the filter screen frame 5, and the torsion spring 62 is fixedly sleeved on the corresponding limiting block 61 rotation shaft and abuts between the corresponding limiting block 61 and the side wall of the air outlet end of the pipe body 1.

[0042] The implementation principle of the air intake duct of a waste heat boiler in the embodiment of the present application is as follows: before the working process of the waste heat boiler, the filter screen frame 5 is first installed on the side wall of the pipe body 1 at the gas outlet end by rotating the limit block 61, and then the air intake duct is installed between the gas engine and the waste heat boiler through the connecting flange 4; during the working process of the waste heat boiler, the inner wall of the pipe body 1 has a spherical grid structure, so that many small vortices are formed when the waste smoke flows through the inside of the pipe body 1, so that the smoke in the pipe body 1 is evenly distributed;

[0043] After the waste heat boiler finishes working, the staff member holds the support rod 71 and rotates the support rod 71 to make the felt 211 clean the dust on the filter frame 5. Then the fixed shaft 7 is pulled out of the pipe body 1 from the air inlet end through the support rod 71, and the support rod 71 is continuously rotated during the pulling process to make the fixed shaft 7 rotate, and the fixed shaft 7 drives the scraper 22 to rotate synchronously, and finally the soot scale on the inner wall of the pipe body 1 is cleaned by the scraper 22.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An air intake pipe of a waste heat boiler, comprising a pipe body (1), characterized in that: The inner core pipe of the pipe body (1) is arranged in a continuous bubble shape, and a cleaning component (2) is arranged inside the pipe body (1) for scraping off the soot scale on the inner wall of the pipe body (1), and a fixed shaft (7) is coaxially rotatably arranged inside the pipe body (1), and the cleaning component (2) comprises a sleeve (21) arranged on the fixed shaft (7) in an axial direction perpendicular to the fixed shaft (7), a scraping strip (22) slidably arranged in the sleeve (21), and a pressure member (23) arranged on the sleeve (21) for applying pressure to the scraping strip (22), and the scraping strip (22) is always in contact with the inner wall of the pipe body (1).

2. The air intake pipe of a waste heat boiler according to claim 1, characterized in that: The pressure member (23) is arranged between the scraper strip (22) and the inner bottom wall of the sleeve (21); a stopper (221) is arranged at the end of the scraper strip (22) close to the inner bottom wall of the sleeve (21); a stopper (212) is arranged on the inner side wall of the inner bottom wall of the sleeve (21) close to the opening; when the scraper strip (22) slides to an extreme position in a direction away from the sleeve (21), the stopper (221) is arranged to abut against the stopper (212).

3. The air intake pipe of a waste heat boiler according to claim 1, characterized in that: A spiral guide plate (8) is arranged in the pipeline body (1), and the spiral guide plate (8) is coaxially arranged with the fixed shaft (7) and wound around the fixed shaft (7). A support rod (71) is arranged at the end of the fixed shaft (7) close to the feed point of the pipeline body (1), and the support rod (71) is perpendicular to the fixed shaft (7), and both ends of the support rod (71) are commonly connected with a sleeve ring (711). A plug-in ring groove (11) is provided on the side wall at the air inlet end of the pipeline body (1) corresponding to the sleeve ring (711), and the sleeve ring (711) is plug-fitted with the plug-in ring groove (11).

4. The air intake pipe of a waste heat boiler according to claim 1, characterized in that: The outer walls of the air inlet and outlet ends of the pipeline body (1) are provided with connecting flanges (4), and the two connecting flanges (4) are provided with annular grooves (41) on opposite sides thereof, and sealing rings (42) are inserted into the annular grooves (41).

5. The air intake pipe of a waste heat boiler according to claim 1, characterized in that: A filter frame (5) is provided at the air outlet end of the pipeline body (1).

6. The air inlet pipe of the waste heat boiler according to claim 5, characterized in that: The filter screen frame (5) is provided with a limiting hole (51) for the fixed shaft (7) to pass through, and the sleeve (21) is arranged at a position close to the filter screen frame (5). A felt (211) is arranged on the side wall of the sleeve (21) facing the filter screen frame (5), and the felt (211) is arranged to abut against the filter screen frame (5).

7. The air intake duct of a waste heat boiler according to claim 5, characterized in that: A plurality of limit blocks (61) are arranged on the side wall of the air outlet end of the pipeline body (1) along the outer periphery of the filter screen frame (5), and the plurality of limit blocks (61) are all rotated toward the filter screen frame (5), and a torsion spring (62) is sleeved on the rotating shaft of each limit block (61), and the filter screen frame (5) is limited on the side wall of the pipeline body (1).

8. The air intake pipe of a waste heat boiler according to claim 1, characterized in that: The exterior of the pipeline body (1) is provided with a heat insulating sleeve (3).

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