Automatic ash removal device of waste heat boiler

Abstract

The utility model provides a waste heat boiler automatic deashing device which comprises a deashing system, a driving system, a control system and a cooling system, the deashing system comprises an injection system, an air inlet system and a supporting part, and a sports car motor of the driving system drives the injection system to stretch, retract and rotate so as to carry out multi-directional covering deashing on a waste heat boiler; the ash removal interval and the travel time are set through the control system to achieve regular automatic ash removal of the waste heat boiler; through check valves of the air inlet system and the cooling system, pipe crossing of the ash removal air inlet system and the cooling system is prevented, the air stopping and supplying state is automatically switched, and the ash removal gun is effectively protected from being damaged by high-temperature corrosion flue gas; the outer pipe of the ash removal gun of the injection system is effectively sealed with the outer wall of the waste heat boiler, and the inner pipe of the ash removal gun is effectively sealed with the outer pipe of the ash remover, so that smoke is prevented from leaking during ash removal, and the field environment is greatly improved. Dust adsorbed on the heat exchanger of the waste heat boiler can be cleaned in all directions, and efficient and stable operation of the waste heat boiler is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of waste heat boilers, specifically to an automatic ash removal device for waste heat boilers. Background Technology

[0002] With rapid economic development, the amount of hazardous waste generated during production has increased dramatically. The proper disposal of hazardous waste has become a major environmental issue restricting production. Incineration has become the fastest, most effective, and most economical technical means for reducing, rendering harmless, and recycling hazardous waste. To reduce the temperature of the flue gas produced after hazardous waste incineration while fully utilizing the large amount of energy generated, waste heat boilers are generally used to recover heat and produce steam as a byproduct. However, the incineration of hazardous waste produces a large amount of SiO2 dust (which generates static electricity, has extremely strong adsorption capacity, and excellent thermal insulation properties). This dust adheres to the heat exchange tubes of the waste heat boiler, causing a significant decrease in the heat exchange efficiency, an increase in the boiler outlet temperature, and a reduction in steam production capacity. To avoid this situation, the heat exchange tubes of the waste heat boiler need to be cleaned regularly to ensure the normal operation of the boiler.

[0003] Existing technologies cannot achieve comprehensive cleaning of waste heat boilers, resulting in poor cleaning effects. However, incomplete cleaning of the heat exchange tubes in waste heat boilers can lead to uneven heating, deformation, or damage. This heat loss can enter subsequent systems, increasing production costs or failing to meet environmental standards, and may even clog the waste heat boiler flue, causing a decrease in system processing capacity and ultimately shutdown.

[0004] Therefore, it is necessary to provide an automatic ash removal device for waste heat boilers that has its own ash removal function, enabling multi-directional ash removal and improving the performance and service life of waste heat boilers. Utility Model Content

[0005] The main objective of this invention is to provide an automatic ash removal device for waste heat boilers, thereby solving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] An automatic ash removal device for a waste heat boiler includes an ash removal system installed outside the waste heat boiler for removing dust from the heat exchange tubes, a drive system installed outside the waste heat boiler for controlling the reciprocating movement of the ash removal system, a control system for adjusting the periodic ash removal of the ash removal system, and a cooling system for cooling the ash removal system. The ash removal system includes a spraying system for cleaning the heat exchange tubes, an air intake system for controlling the ash removal medium, and supporting components for supporting the spraying system. The spraying system includes an outer tube and an inner tube of the ash removal gun, the outer tube of which passes through… The flange is connected to the outer wall of the waste heat boiler; the air intake system includes a cleaning medium inlet and a cleaning medium lifting valve, the cleaning medium air intake lifting valve being connected to the cleaning medium inlet pipe and the inner pipe of the cleaning gun via a pipeline; the support component includes a main structural beam, the main structural beam being positioned with the outer pipe of the cleaning gun via support pulleys; the drive system includes a trolley motor and a trolley reducer, the trolley motor and the trolley reducer being connected to the main structural beam via traveling rollers; the control system includes a travel switch, the trolley motor being connected to the travel switch via a cable and a suspension rod.

[0008] Optionally, the outer tube of the cleaning gun is connected to the inner tube of the soot remover via a mechanical seal, and the outer tube of the cleaning gun is connected to the bearing of the trolley reducer via a flange. The trolley reducer is connected to the trolley motor via a chain. The trolley motor drives the reducer and the outer tube of the soot remover to rotate via the chain, increasing the ash removal coverage area of ​​the waste heat boiler and significantly improving the ash removal efficiency.

[0009] Optionally, the dust removal gun support pulley is located outside the outer tube of the dust removal gun. There are two dust removal gun support pulleys, which are arranged at staggered angles to ensure that the dust removal gun can extend, retract, and rotate without jamming.

[0010] Optionally, the end of the outer tube of the cleaning gun is sealed with a spherical cap, and the nozzle 15 is welded to the end wall of the outer tube of the cleaning gun. The nozzle is constructed as a concentric flared mouth.

[0011] Optionally, the number of nozzles in the dust removal gun is four, arranged radially in pairs on the same horizontal plane, with the two front nozzles spraying forward and the two rear nozzles spraying backward.

[0012] Optionally, the cleaning medium intake valve is a mechanically operated valve. The trolley reducer is equipped with a cam groove and a stop pin. The spring valve stem of the cleaning medium intake valve is connected to the stop pin by bolts, and the stop pin is fixedly connected to the side of the main structural beam by bolts. The stop pin controls the opening or closing of the cleaning medium intake valve, thereby controlling the entry of the cleaning medium into the inner and outer tubes of the cleaning gun. When the trolley reducer moves to a certain position, it causes the cam groove to disengage from the stop pin, the stop pin is released, and the spring of the cleaning medium intake valve automatically opens. When the reducer moves to a certain position, it causes the cam groove to press against the stop pin, the stop pin is pressed tight, and the spring of the cleaning medium intake valve automatically closes.

[0013] Optionally, the trolley reducer is connected to the rack via gears. The rack is located below the main structural beam, and the trolley reducer moves below the main structural beam via the rack to clean the heat exchanger of the waste heat boiler.

[0014] Optionally, the traveling rollers are respectively mounted on the housings of the coupe motor and the coupe reducer, and installed on the lower end face of the main structural beam. The coupe motor and the coupe reducer are connected to the lower end face of the main structural beam through the traveling rollers to maintain stable operation of the drive system.

[0015] Optionally, the main structural beam is connected to the front structural suspension bracket and the rear structural suspension bracket by bolts, and the side of the main structural beam is fixedly connected to the front limiter and the rear limiter by bolts.

[0016] In the above technical solution, the trolley motor drives the spraying system to perform telescopic and spiral movements. The front and rear limiters control the operation of the trolley motor. The trolley drives the outer tube of the dust removal gun to rotate 360° while moving radially. The nozzle set at the end of the outer tube of the dust removal gun rotates and moves 360° with the outer tube of the dust removal gun to spray.

[0017] Optionally, the cooling system includes a first cooling air inlet pipe and a second cooling air inlet pipe. The first cooling air inlet pipe is connected to the inner tube of the cleaning gun via a first pipe, and the first pipe is equipped with a first check valve to cool the cleaning gun and improve the cleaning effect. The second cooling air inlet pipe is connected to the outer wall of the waste heat boiler via a second pipe, and the second pipe is equipped with a second check valve to cool the flange sealing the boiler and prevent corrosion. By combining the pressure difference between the cleaning medium and the cooling air, the system can automatically supply or stop the injection of cooling air to the cleaning gun, avoiding high-temperature damage and corrosion of the cleaning gun, significantly improving the service life of the cleaning device, and reducing manual operation.

[0018] Optionally, the travel switch can be configured with both local and remote control modes, and the ash removal system can be set with ash removal intervals and travel times to achieve periodic automatic ash removal of the waste heat boiler.

[0019] Optionally, the main structural beam is made of I-beams, and the front and rear structural suspension supports are threaded rods. The cables and suspension rods are made of round steel. The ash removal system maintains structural stability by using I-beams in the main beam structure, and the structural suspension supports are made of threaded rods, making the installation and alignment of the ash removal system simpler.

[0020] Optionally, the inner diameter of the flange on the outer wall of the waste heat boiler is larger than the outer diameter of the ash cleaning gun outer pipe. The flange is sealed with bolts and sealed with internal filler. A wall box is installed outside the flange for reinforcement. The wall box is box-shaped and filled with heat insulation material.

[0021] The beneficial effects of this utility model are as follows: This utility model provides an automatic ash removal device for waste heat boilers. The trolley motor drives the rotation of the ash removal gun and nozzle, and the front and rear limiters control the extension and retraction of the ash removal gun and nozzle, enabling comprehensive cleaning of the heat exchange tubes of the waste heat boiler. The control system sets the ash removal interval and stroke time to achieve periodic automatic ash removal of the waste heat boiler. The design of the ash removal medium inlet lift valve, cam groove, impact pin, and cooling air check valve prevents cross-contamination between the ash removal air intake system and the cooling system, automatically switches between air stop and air replenishment states, and effectively protects the ash removal gun from high-temperature corrosion and flue gas damage. Effective sealing is used between the outer tube of the ash removal gun and the outer wall of the waste heat boiler, and between the inner tube of the ash removal gun and the outer tube of the ash remover, ensuring no flue gas leakage during ash removal and significantly improving the on-site environment. The main structural beam of the supporting component is fixed by a threaded rod suspension bracket, making installation simpler and more convenient. This utility model achieves comprehensive cleaning of dust adsorbed on the heat exchanger of the waste heat boiler, ensuring efficient and stable operation of the waste heat boiler. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the automatic ash removal device for waste heat boilers according to this utility model;

[0024] Figure 2 This is an axonometric view of the automatic ash removal device for waste heat boilers of this utility model;

[0025] Figure 3 This is a schematic diagram of the connection between the cleaning gun of this utility model and the waste heat boiler;

[0026] Figure 4 This is a partially enlarged view of the dust removal system of this utility model;

[0027] Figure 5 yes Figure 1 A sectional view of part A;

[0028] Figure 6 This is a schematic diagram of the soot blowing gun and nozzle of this utility model;

[0029] In the diagram: 1. Carriage motor; 2. Carriage reducer; 3. Chain; 4. Gear rack; 5. Rear limiter; 6. Front limiter; 7. Traveling roller; 8. Travel switch; 9. Cable and suspension rod; 10. Main structural beam; 11. Front structural suspension bracket; 12. Rear structural suspension bracket; 13. Soot cleaning gun outer tube; 14. Soot cleaning gun inner tube; 15. Nozzle; 16. Soot cleaner seal; 17. Soot cleaning medium inlet; 18. First cooling air inlet; 19. Second cooling air inlet; 20. Soot cleaning medium air intake lift valve; 21. Wall box; 22. Waste heat boiler internal heat exchange tube; 23. Waste heat boiler outer wall; 24. Soot cleaning device outer shell; 25. Impact pin; 26. Connecting flange; 27. Support pulley; 28. Cam groove. Detailed Implementation

[0030] like Figure 1-6 As shown, an automatic ash removal device for a waste heat boiler includes an ash removal system installed outside the waste heat boiler for removing dust from the heat exchange tubes, a drive system installed outside the waste heat boiler for controlling the reciprocating movement of the ash removal system, a control system for adjusting the periodic ash removal of the ash removal system, and a cooling system for cooling the ash removal system. The ash removal system includes a spraying system for cleaning the heat exchange tubes, an air intake system for controlling the ash removal medium, and supporting components for supporting the spraying system. The spraying system includes an outer tube 13 and an inner tube 14 of the ash removal gun. The outer tube 13 is connected to the waste heat boiler via a flange 26. The furnace outer wall 23 is connected and sealed with packing. The air intake system includes a cleaning medium inlet 17 and a cleaning medium lifting valve 20. The cleaning medium air intake lifting valve 20 is connected to the cleaning medium inlet pipe 17 and the inner pipe 14 of the cleaning gun through a pipeline. The support component includes a main structural beam 10. The main structural beam 10 is positioned with the outer pipe 13 of the cleaning gun through a cleaning gun support pulley 27. The drive system includes a trolley motor 1 and a trolley reducer 2. The trolley motor 1 and the reducer 2 are connected to the main structural beam 10 through a traveling roller 7. The control system includes a travel switch 8. The trolley motor 1 is connected to the travel switch 8 through a cable and a suspension rod 9.

[0031] As a preferred embodiment, the outer tube 13 of the cleaning gun is connected to the inner tube 14 of the cleaning device by a mechanical seal, the outer tube 13 of the cleaning gun is connected to the bearing of the trolley reducer 2 by a flange, and the trolley reducer 2 is connected to the trolley motor 1 by a chain 3.

[0032] As a preferred embodiment, the dust cleaning gun support pulley 27 is located outside the outer tube 13 of the dust cleaning gun, and there are two dust cleaning gun support pulleys 27 arranged at staggered angles.

[0033] As a preferred embodiment, the outer tube 13 of the dust removal gun has a spherical cap at its end, and nozzles 15 are welded to the end wall of the outer tube 13. The nozzles 15 are concentric bell-shaped, and there are four nozzles 15 arranged radially in pairs on the same horizontal plane, with the two at the front spraying forward and the two at the rear spraying backward. The radial arrangement of the nozzles in pairs makes the dust removal more thorough.

[0034] As a preferred embodiment, the cleaning medium intake lift valve 20 is a mechanically operated valve. The trolley reducer 2 is equipped with a cam groove 28 and a striking pin 25. The spring valve stem of the cleaning medium intake lift valve 20 is bolted to the striking pin 25. The striking pin 25 is mounted on the trolley reducer and is fixedly connected to the side of the main structural beam 10 by bolts. When the trolley reducer moves to a certain position, it causes the cam groove to disengage from the striking pin, releasing the striking pin and automatically opening the cleaning medium intake lift valve spring. When the reducer moves to a certain position, it causes the cam groove to press against the striking pin, tightening the striking pin and automatically closing the cleaning medium intake lift valve spring.

[0035] As a preferred embodiment, the trolley reducer 2 is connected to the rack 4 via gears, and the rack 4 is positioned below the main structural beam 10. The trolley reducer moves below the main structural beam via the rack to clean the heat exchanger of the waste heat boiler.

[0036] As a preferred embodiment, the traveling rollers 7 are respectively mounted on the housings of the coupe motor 1 and the coupe reducer 2. The traveling rollers 7 are installed on the lower end face of the main structural beam 10. The coupe motor and the coupe reducer are connected to the lower end face of the main structural beam through the traveling rollers to maintain the stable operation of the drive system.

[0037] As a preferred embodiment, the main structural beam 10 is connected to the front structural suspension bracket 11 and the rear structural suspension bracket 12 by bolts, and the side of the main structural beam 10 is fixedly connected to the front limiter 6 and the rear limiter 5 by bolts. The reverse rotation of the trolley reducer is controlled by the front and rear limiters to exit the waste heat boiler.

[0038] As a preferred embodiment, the cooling system includes a first cooling air inlet pipe 18 and a second cooling air inlet pipe 19. The first cooling air inlet pipe 18 is connected to the inner pipe 14 of the ash cleaning gun through a first pipe, and a check valve is installed on the first pipe. The second cooling air inlet pipe 19 is connected to the outer wall 23 of the waste heat boiler through a second pipe, and a check valve is installed on the second pipe.

[0039] As a preferred embodiment, the main structural beam 10 is made of I-beams, and the front structural suspension bracket 11 and the rear structural suspension bracket 12 are threaded rods. The cable and suspension rod 9 are made of round steel. The ash removal system maintains structural stability by using I-beams in the main structural beam 10, and the structural suspension support uses threaded rods, making the installation and alignment of the ash removal system simpler.

[0040] As a preferred embodiment, the inner diameter of the flange 26 on the outer wall of the waste heat boiler is larger than the outer diameter of the ash cleaning gun outer tube 13. The flange 26 is sealed with bolts and sealed with internal filler. The flange is reinforced with a wall box 21. The wall box 21 is box-shaped and filled with heat insulation material.

[0041] The working principle of this utility model is as follows: First, cooling air is injected into the inner tube 14 and outer tube 13 of the ash-cleaning gun through the pipes from the first cooling air inlet pipe 18 and the second cooling air inlet pipe 19. The travel switch 8 is activated, and the trolley motor 1 rotates forward, driving the bearing, chain 3, and outer tube 13 of the trolley reducer 2 to rotate synchronously. The top gear and gear rack of the trolley reducer 2 engage and move forward. The cam groove 28 moves forward with the reducer 2, releasing the pressure on the impact pin 25. The spring valve stem of the ash-cleaning medium intake lifting valve 20 pushes open the impact pin 25, allowing the ash-cleaning medium to enter the inner tube 14 and outer tube 13 of the ash-cleaning gun through the pipes and reach the nozzle 15 for spraying. As the outer tube 13 of the ash-cleaning gun rotates and moves forward, the nozzle 15 covers and purges the heat exchange tube 22 inside the waste heat boiler. When the pressure of the ash-cleaning medium is greater than the cooling air pressure, the ash-cleaning medium continues to flow. When the cooling air pressure is reduced, the check valve of the cooling air duct closes, stopping the injection of cooling air into the inner tube 14 of the cleaning gun. When the trolley reducer 2 reaches the designated position, it triggers the rear limiter 5, the trolley motor 1 changes its rotation direction, driving the trolley reducer 2 to rotate in the opposite direction. The trolley motor 1, the trolley reducer 2, and the outer tube 13 of the cleaning gun move backward, and the outer tube 13 of the cleaning gun rotates 360° in the opposite direction. When the trolley reducer 2 returns to the starting position, it triggers the front limiter 6, the trolley motor 1 resumes its rotation direction and stops rotating, the cam groove 28 presses the impact pin 25, driving the spring valve stem of the cleaning medium intake lift valve 20 to close the cleaning medium intake lift valve 20, the cleaning medium stops intake, the pressure of the cleaning medium is less than the pressure of the cooling air, the check valve of the cooling air duct opens, and cooling air is injected into the inner tube 14 and the outer tube 13 of the cleaning gun, and the cleaning work is completed.

[0042] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. An automatic ash removal device for a waste heat boiler, characterized in that: The system includes a dust removal system installed outside the waste heat boiler to remove dust from the heat exchange tubes of the waste heat boiler, a drive system installed outside the waste heat boiler to control the reciprocating movement of the dust removal system, a control system for adjusting the periodic dust removal of the dust removal system, and a cooling system for cooling the dust removal system. The dust removal system includes a spraying system for cleaning the heat exchange tubes, an air intake system for controlling the dust removal medium, and support components for supporting the spraying system. The spraying system includes an outer tube (13) and an inner tube (14) of the dust removal gun. The outer tube (13) of the dust removal gun is connected to the outer wall (23) of the waste heat boiler via a flange (26). The air intake system includes a dust removal medium inlet (17). The cleaning medium lifting valve (20) is connected to the cleaning medium inlet pipe (17) and the cleaning gun inner pipe (14) through a pipeline; the supporting component includes a main structural beam (10), which is positioned with the cleaning gun outer pipe (13) through the cleaning gun support pulley (27); the drive system includes a trolley motor (1) and a trolley reducer (2), which are connected to the main structural beam (10) through the travel roller (7); the control system includes a travel switch (8), which is connected to the travel switch (8) through a cable and a suspension rod (9).

2. The automatic ash removal device for a waste heat boiler according to claim 1, characterized in that: The outer tube (13) of the cleaning gun and the inner tube (14) of the cleaning device are connected by a mechanical seal. The outer tube (13) of the cleaning gun is connected to the bearing of the trolley reducer (2) through a flange. The trolley reducer (2) is connected to the trolley motor (1) through a chain (3).

3. The automatic ash removal device for a waste heat boiler according to claim 1, characterized in that: The dust removal gun support pulley (27) is located outside the outer tube (13) of the dust removal gun. There are two dust removal gun support pulleys (27), which are arranged at staggered angles.

4. The automatic ash removal device for a waste heat boiler according to claim 1, characterized in that: The end of the outer tube (13) of the cleaning gun is sealed with a spherical cap, and the end of the outer tube (13) of the cleaning gun is welded with a nozzle (15), which is a concentric flared mouth.

5. The automatic ash removal device for a waste heat boiler according to claim 4, characterized in that: The cleaning gun nozzles (15) are four in number, arranged radially in pairs on the same horizontal plane.

6. The automatic ash removal device for a waste heat boiler according to claim 1, characterized in that: The cleaning medium intake lifting valve (20) is a mechanically operated valve. The spring valve stem of the cleaning medium intake lifting valve (20) is connected to the impact pin (25) by bolts. The impact pin (25) is installed on the trolley reducer and is fixedly connected to the side of the main structural beam (10) by bolts.

7. The automatic ash removal device for a waste heat boiler according to claim 1, characterized in that: The sports car reducer (2) is connected to the gear rack (4) by gears, and the gear rack (4) is located below the main structural beam (10).

8. The automatic ash removal device for a waste heat boiler according to claim 1, characterized in that: The traveling rollers (7) are respectively mounted on the housings of the sports car motor (1) and the sports car reducer (2) and installed on the lower end face of the main structural beam (10).

9. The automatic ash removal device for a waste heat boiler according to claim 1, characterized in that: The main structural beam (10) is connected to the front structural suspension bracket (11) and the rear structural suspension bracket (12) by bolts, and the side of the main structural beam (10) is fixedly connected to the front limiter (6) and the rear limiter (5) by bolts.

10. The automatic ash removal device for a waste heat boiler according to claim 1, characterized in that: The cooling system includes a first cooling air inlet pipe (18) and a second cooling air inlet pipe (19). The first cooling air inlet pipe (18) is connected to the inner pipe (14) of the ash cleaning gun through a first pipe. A first check valve is provided on the first pipe. The second cooling air inlet pipe (19) is connected to the outer wall (23) of the waste heat boiler through a second pipe. A second check valve is provided on the second pipe.

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