Coal economizer with anti-blocking structure

Abstract

This utility model belongs to the field of economizer technology, specifically an economizer with an anti-clogging structure. A heat exchange box is installed on the workbench, and an exhaust pipe is installed on the heat exchange box. Several heat exchange tubes are distributed inside the heat exchange box. A water inlet pipe passing through the exhaust pipe is installed on one side of the top of the heat exchange box, and a water outlet pipe passing through the exhaust pipe is installed on one side of the bottom of the heat exchange box. An adjusting plate is installed on each side of the heat exchange box, and two adjusting grooves are provided on the adjusting plates. Sliding frames are slidably installed in both sets of adjusting grooves, and mounting brackets are provided on both sets of sliding frames. A set of acoustic soot removers is fixedly installed on each set of mounting brackets. After the acoustic soot remover finishes working, it automatically moves away from the heat exchange box, and the cleaning plate closes under the action of an adjusting spring, preventing high-temperature flue gas and dust from backflowing into the acoustic soot remover, reducing diaphragm wear and electronic component corrosion, and extending the service life of the acoustic soot remover.

Description

Technical Field

[0001] This utility model belongs to the field of economizer technology, specifically an economizer with an anti-clogging structure. Background Technology

[0002] An economizer is a device installed at the bottom of the boiler flue to recover the waste heat of the exhaust gas. It heats the boiler feedwater to saturated water at the pressure of the steam drum. Because it absorbs the heat of the high-temperature flue gas, it reduces the exhaust temperature of the flue gas, saves energy, and improves efficiency, hence the name economizer.

[0003] The specific design and structure of economizers with anti-clogging structures may vary depending on the manufacturer and application requirements, but generally they include the following key parts: shell, flue gas delivery pipe, and distribution pipe. The shell, as the external protective structure of the economizer, is usually made of metal and its outer surface is generally covered with insulation material to reduce heat loss. The flue gas delivery pipe is used to connect to the boiler tail flue and deliver the flue gas discharged from the boiler to the economizer. The lower part of the elbow at its end is usually welded with a quick-drain pipe, which can be used to clean large particles of debris in the flue gas when they accumulate at the elbow. The distribution pipe is connected to the flue gas delivery pipe through an elbow and extends into the shell. Its top is designed to be sealed, and multiple connecting pipes are welded on the distribution pipe to distribute the flue gas evenly into each connecting pipe, and then to the flue gas outlet pipe.

[0004] Traditional devices use acoustic sensors to clean the inside of the economizer. The acoustic sensors need to be fixed inside the economizer. The acoustic sensors are subject to backflow of high-temperature flue gas and dust, which causes diaphragm wear and corrosion of electronic components, reducing the service life of the acoustic soot cleaner. The flue gas inlet design of traditional devices does not take into account the particle size difference of ash particles in the flue gas. Coarse ash particles directly enter the heat exchange area with the flue gas, which not only increases the ash accumulation load, but may also block the bottom of the flow channel due to gravity deposition, resulting in uneven flue gas flow velocity. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology and solve the problems mentioned in the background technology, this utility model proposes an economizer with an anti-clogging structure.

[0006] The technical solution adopted by this utility model to solve its technical problem is an economizer with an anti-clogging structure, including a workbench, a heat exchange box set on the workbench, a flue pipe set on the heat exchange box, and several heat exchange tubes distributed inside the heat exchange box. A water inlet pipe passing through the flue pipe is installed on one side of the top of the heat exchange box, and a water outlet pipe passing through the flue pipe is installed on one side of the bottom of the heat exchange box. An adjusting plate is set on each side of the heat exchange box, and two adjusting slide grooves are set on the adjusting plate. A sliding frame is slidably set in each of the two sets of adjusting slide grooves. A mounting bracket is set on each of the two sets of sliding brackets, and a set of sonic soot removers is fixedly installed on each of the two sets of mounting brackets. A cylinder mounting bracket is set on each side of the heat exchange box, and an adjusting cylinder is set on each of the two cylinder mounting brackets. A sliding bracket is fixedly connected to the output end of each of the two adjusting cylinders. A cleaning hole is opened at the top of each sonic soot remover, and a cleaning plate is hinged to the cleaning hole. An adjusting spring is set at the top of the cleaning plate.

[0007] Preferably, a dust removal chamber is provided below the workbench, and a mounting plate is provided on each side of the dust removal chamber. A dust filter plate is fixedly installed at the bottom of the two mounting plates. A fixing bracket is provided on each side of the dust removal chamber. Threaded holes are provided on both fixing brackets and the two mounting plates. The two fixing brackets and the threaded holes on the two mounting plates are fixedly connected by a fixing bolt. Two motor brackets are provided on the side of the dust removal chamber, and a dust removal motor is installed on each of the two motor brackets. Two transmission screws are rotatably installed inside the dust removal chamber. A dust scraper is slidably installed inside the dust removal chamber. The dust scraper has two threaded holes. The two transmission screws rotate through a threaded hole on a dust scraper. The output ends of the two dust removal motors are fixedly connected to the top of a transmission screw.

[0008] Preferably, the bottom of the workbench is provided with four support rods, which are used to support the economizer and ensure stable operation of the equipment under boiler vibration.

[0009] Preferably, the two cleaning motors rotate in the same direction and at the same speed, working synchronously to avoid uneven force causing the scraper to tilt and to ensure that there are no dead corners in the cleaning process.

[0010] Preferably, the bottom of the ash removal chamber is provided with a flue gas inlet pipe, and the heat exchange box is hinged with an inspection door. The inspection door is provided with an opening handle. Opening the inspection door in conjunction with the opening handle reduces the operating force, making it easy for a single person to complete the maintenance. The dust-laden flue gas enters from the flue gas inlet pipe at the bottom of the ash removal chamber. Utilizing the principle of gravity settling, large dust particles are first separated and deposited at the bottom of the ash removal chamber, reducing the amount of dust entering the heat exchange box and reducing the ash accumulation rate of the heat exchange tubes.

[0011] Preferably, both the acoustic soot remover and the soot removal motor are connected to an external controller. The controller is used to control the start and stop of the acoustic soot remover and the soot removal motor. The controller can automatically trigger the start and stop of the acoustic soot remover and the soot removal motor according to parameters such as real-time monitored flue gas pressure difference, running time or boiler load.

[0012] The advantages of this utility model are: after the ultrasonic cleaner finishes working, it automatically moves away from the heat exchange box, and the cleaning plate closes under the action of the adjusting spring, preventing high-temperature flue gas and dust from flowing back into the interior of the ultrasonic cleaner, reducing diaphragm wear and electronic component corrosion, and extending the service life of the ultrasonic cleaner.

[0013] The scraper moves along the filter plate to remove the ash layer adhering to the surface of the filter plate, preventing the filter plate from becoming clogged and causing a decrease in flue gas velocity; the fixing bolt connection method facilitates quick disassembly of the mounting plate, cleaning of accumulated ash or replacement of the filter plate. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure;

[0016] Figure 2 This is a schematic diagram of the overall cross-sectional structure;

[0017] Figure 3 This is a schematic diagram of the acoustic wave sensor structure;

[0018] Figure 4 This is a schematic diagram of the ash removal silo structure;

[0019] Figure 5 This is a schematic diagram of the ash removal board structure;

[0020] In the diagram: 1. Workbench; 2. Exhaust pipe; 3. Heat exchanger pipe; 4. Water inlet pipe; 5. Acoustic soot remover; 6. Mounting bracket; 7. Inlet pipe; 8. Mounting plate; 9. Fixing bracket; 10. Fixing bolt; 11. Dust filter plate; 12. Motor bracket; 13. Soot removal motor; 14. Drive screw; 15. Scraper; 16. Soot removal chamber; 17. Inspection door; 18. Door handle; 19. Support rod; 21. Heat exchange box; 22. Adjusting plate; 23. Adjusting slide; 26. Cylinder mounting bracket; 27. Adjusting cylinder; 28. Sliding frame; 29. ​​Soot removal hole; 30. Soot removal plate; 31. Adjusting spring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0022] Please see Figure 1-5 As shown, an economizer with an anti-clogging structure includes a workbench 1, a heat exchange box 21 on the workbench 1, a flue pipe 2 on the heat exchange box 21, several heat exchange tubes 3 distributed inside the heat exchange box 21, a water inlet pipe 4 passing through the flue pipe 2 installed on one side of the top of the heat exchange box 21, a water outlet pipe passing through the flue pipe 2 installed on one side of the bottom of the heat exchange box 21, an adjusting plate 22 on each side of the heat exchange box 21, two adjusting grooves 23 on the adjusting plate 22, a sliding frame 28 slidably installed in each of the two sets of adjusting grooves 23, a mounting bracket 6 on each of the two sets of sliding frames 28, and a set of acoustic soot removers 5 fixedly installed on each of the two sets of mounting brackets 6;

[0023] A cylinder mounting bracket 26 is provided on each side of the heat exchange box 21. An adjusting cylinder 27 is provided on each of the two cylinder mounting brackets 26. A sliding bracket 28 is fixedly connected to the output end of each of the two adjusting cylinders 27. A cleaning hole 29 is provided at the top of each of the acoustic cleaning devices 5. A cleaning plate 30 is hinged on the cleaning hole 29. An adjusting spring 31 is provided at the top of the cleaning plate 30.

[0024] A dust removal chamber 16 is provided below the workbench 1. A mounting plate 8 is provided on each side of the dust removal chamber 16. A dust filter plate 11 is fixedly mounted on the bottom of each mounting plate 8. A fixing bracket 9 is provided on each side of the dust removal chamber 16. Threaded holes are provided on both the fixing bracket 9 and the mounting plates 8. The two fixing brackets 9 and the threaded holes on the two mounting plates 8 are fixedly connected by a fixing bolt 10. Two motor brackets 12 are provided on the side of the dust removal chamber 16. A dust removal motor 13 is mounted on each of the two motor brackets 12. Two transmission screws 14 are rotatably mounted inside the dust removal chamber 16. A scraper plate 15 is slidably mounted inside the dust removal chamber 16. The scraper plate 15 has two threaded holes. Each of the two transmission screws 14 rotates through one of the threaded holes on the scraper plate 15. The output ends of the two dust removal motors 13 are fixedly connected to the top of one of the transmission screws 14.

[0025] During operation, to clean the economizer, dust-laden flue gas enters the cleaning chamber 16 through the inlet pipe 7. Larger particles settle directly, while smaller particles are intercepted by the dust filter plate 11, preventing dust accumulation from clogging the flue or affecting heat exchange efficiency. The cleaning motor 13 synchronously drives the transmission screw 14 to rotate, and the scraper plate 15, through a threaded hole, engages with the screw and moves linearly along the screw, scraping the dust filter plate 11 and the accumulated dust at the bottom of the chamber to a designated position, thus achieving automatic cleaning. The regulating cylinder 27 drives the sonic cleaner 5 along the regulating slide 2. 3. Move to the preset cleaning position until the cleaning plate 30 is opened and enters the heat exchange box 21. The sound wave is transmitted to the heat exchange box 21 through the cleaning hole 29 and acts on the surface of the heat exchange tube 3. The two sides of the sound wave cleaner 5 emit synchronously and alternately to form a composite sound field, covering different areas of the heat exchange tube 3 and cleaning the heat exchange tube 3. After the cleaning is completed, the adjusting cylinder 27 drives the sound wave cleaner 5 away from the heat exchange box 21 and returns to the initial position. The sound wave cleaner 5 stops supplying air, and the cleaning plate 30 closes quickly under the action of the adjusting spring 31.

[0026] The heat exchange box 21 is hinged with an inspection door 17, and the inspection door 17 is equipped with a door handle 18; the bottom of the workbench 1 is equipped with four support rods 19, which are used to support the economizer; the two ash cleaning motors 13 rotate in the same direction and at the same speed, and operate synchronously.

[0027] The bottom of the ash removal chamber 16 is provided with a smoke inlet pipe 7; the acoustic soot remover 5 and the ash removal motor 13 are both connected to an external controller, which is used to control the start and stop of the acoustic soot remover 5 and the ash removal motor 13.

[0028] During operation, in order to overhaul the economizer, after shutdown, the operator opens the maintenance door 17 through the door handle 18 and enters the heat exchange box 21 to check the wear and corrosion of the heat exchange tubes 3; clean residual ash or replace damaged parts; check the installation status of the sonic soot remover 5 and the nozzle blockage; when maintaining the ash cleaning chamber 16, loosen the fixing bolts 10, remove the mounting plate 8 and the dust filter plate 11, check the wear of the scraper 15 and the transmission screw 14, replenish the lubricating grease, and remove the dust accumulated at the bottom of the ash cleaning chamber 16 to avoid affecting the next ash cleaning effect.

[0029] Working principle: To clean the economizer, dust-laden flue gas enters the cleaning chamber 16 through the inlet pipe 7. Larger particles settle directly, while smaller particles are intercepted by the dust filter plate 11, preventing dust accumulation from clogging the flue or affecting heat exchange efficiency. The cleaning motor 13 synchronously drives the transmission screw 14 to rotate, and the scraper plate 15, through a threaded hole, engages with the screw and moves linearly along the screw, scraping the dust filter plate 11 and the accumulated dust at the bottom of the chamber to a designated position, thus achieving automatic cleaning. The regulating cylinder 27 drives the sonic cleaner 5 along the regulating slide 2. 3. Move to the preset cleaning position until the cleaning plate 30 is opened and enters the heat exchange box 21. The sound wave is transmitted to the heat exchange box 21 through the cleaning hole 29 and acts on the surface of the heat exchange tube 3. The two sides of the sound wave cleaner 5 emit synchronously and alternately to form a composite sound field, covering different areas of the heat exchange tube 3 and cleaning the heat exchange tube 3. After the cleaning is completed, the adjusting cylinder 27 drives the sound wave cleaner 5 away from the heat exchange box 21 and returns to the initial position. The sound wave cleaner 5 stops supplying air, and the cleaning plate 30 closes quickly under the action of the adjusting spring 31.

[0030] To overhaul the economizer, after shutdown, operators open the maintenance door 17 via the door handle 18 to enter the heat exchange box 21, check the wear and corrosion of the heat exchange tubes 3, clean residual ash or replace damaged parts, check the installation status of the sonic soot remover 5 and the nozzle blockage, and loosen the fixing bolts 10 during the maintenance of the ash cleaning chamber 16, remove the mounting plate 8 and the dust filter plate 11, check the wear of the scraper 15 and the transmission screw 14, replenish the lubricating grease, and remove the dust accumulated at the bottom of the ash cleaning chamber 16 to avoid affecting the next ash cleaning effect.

[0031] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A coal economizer having a anti-clogging structure, characterized by: The device includes a workbench (1), on which a heat exchange box (21) is provided. A flue pipe (2) is provided on the heat exchange box (21). Several heat exchange tubes (3) are distributed inside the heat exchange box (21). A water inlet pipe (4) passing through the flue pipe (2) is installed on one side of the top of the heat exchange box (21). A water outlet pipe passing through the flue pipe (2) is installed on one side of the bottom of the heat exchange box (21). An adjustment plate (22) is provided on each side of the heat exchange box (21). Two adjustment slides (23) are provided on the adjustment plate (22). A sliding frame (28) is slidably provided in each of the two sets of adjustment slides (23). A mounting bracket (6) is provided on each of the two sets of sliding frames (28). A set of sonic soot removers (5) is fixedly installed on each of the two sets of mounting brackets (6). The model of the two sets of sonic soot removers (5) is DSK-5. A cylinder mounting bracket (26) is provided on each side of the heat exchange box (21). An adjusting cylinder (27) is provided on each of the two cylinder mounting brackets (26). A sliding bracket (28) is fixedly connected to the output end of each of the two adjusting cylinders (27). A cleaning hole (29) is provided at the top of the acoustic soot remover (5). A cleaning plate (30) is hinged on the cleaning hole (29). An adjusting spring (31) is provided at the top of the cleaning plate (30).

2. The economizer with anti-blocking structure according to claim 1, characterized in that: Below the workbench (1) is a dust removal chamber (16). A mounting plate (8) is provided on each side of the dust removal chamber (16). Dust filter plates (11) are fixedly mounted on the bottom ends of the two mounting plates (8). A fixing bracket (9) is provided on each side of the dust removal chamber (16). Threaded holes are provided on both the fixing bracket (9) and the two mounting plates (8). The two fixing brackets (9) and the threaded holes on the two mounting plates (8) are fixedly connected by a fixing bolt (10). Two motor brackets (12) are provided on the side of the dust removal chamber (16). Each motor bracket (12) is equipped with a dust removal motor (13). Two transmission screws (14) are rotatably installed inside the dust removal chamber (16). A scraper plate (15) is slidably installed inside the dust removal chamber (16). The scraper plate (15) is designed to fit against the bottom end of the dust filter plate (11). The scraper plate (15) is provided with two threaded holes. The two transmission screws (14) are rotatably passed through a threaded hole on a scraper plate (15). The output ends of the two dust removal motors (13) are fixedly connected to the top end of a transmission screw (14).

3. The economizer with anti-blocking structure according to claim 2, characterized in that: The bottom of the workbench (1) is provided with four support rods (19), which are used to support the economizer.

4. The economizer with anti-blocking structure according to claim 3, characterized in that: The two cleaning motors (13) rotate in the same direction and at the same speed, and operate synchronously.

5. The economizer with anti-blocking structure according to claim 4, characterized in that: The heat exchange box (21) is hinged with an inspection door (17), and the inspection door (17) is equipped with a door handle (18). The bottom of the ash removal chamber (16) is equipped with a flue gas inlet pipe (7).

6. The coal economizer with anti-blocking structure according to claim 3, characterized in that: Both the acoustic soot remover (5) and the soot removal motor (13) are connected to an external controller, which is used to control the start and stop of the acoustic soot remover (5) and the soot removal motor (13).

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