Boiler ash removal device for waste incineration power plant

Abstract

The utility model discloses a boiler ash removal device for a waste incineration power plant. The boiler ash removal device comprises a high-pressure water supply assembly, a particle supply assembly, a solid-liquid mixer, a flexible connecting pipe and a high-pressure spray head, the solid-liquid mixer is of a three-way structure, the input end of the solid-liquid mixer is connected with the high-pressure water supply assembly and the particle supply assembly so that high-pressure water and particles can be mixed to form a high-pressure mixture, and the output end of the solid-liquid mixer is connected with the high-pressure spray head through a telescopic flexible connecting pipe so that the high-pressure mixture can be sprayed into the boiler. High-speed impact and friction are generated on the pipeline of the heating surface of the boiler through the high-pressure jet flow, so that accumulated dust with high cohesiveness on the heating surface of the boiler is removed. The boiler ash cleaning device has the advantages of being compact in structure, convenient to maintain, high in cleaning efficiency, high in safety and the like, and the boiler ash cleaning quality is remarkably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of garbage incineration treatment, and in particular relates to a boiler ash cleaning device used in a garbage incineration power plant. Background Art

[0002] During the long-term operation of the boiler in a waste incineration power plant, the ash accumulation on the heating surface is one of the important factors affecting the safety and efficient operation of the entire power plant. The composition of domestic waste is complex. Among them, slag waste and kitchen waste will produce a large amount of ash components after incineration. Ash accumulation will not only cause large thermal resistance of the heating surface, high exhaust temperature, low boiler efficiency, and low economic benefits of the waste incineration power plant, but also aggravated ash accumulation will cause corrosion and perforation of the heating surface tube wall, reduce strength, and cause tube burst.

[0003] At present, the main way to deal with the ash accumulation problem in waste incineration power plants is to arrange ash cleaning devices on the heating surface, clean it regularly, and shut down the furnace regularly for ash cleaning. Among them, the high-temperature evaporator and high-temperature superheater in the second and third channels and horizontal flues are seriously ash-accumulated.

[0004] In addition, the prior art also uses a dust cleaning device with a high-pressure water gun to flush the pipeline to achieve the purpose of dust cleaning. The specific solution is: by controlling the pressure, flow rate and direction of the high-pressure water gun, the dust accumulated on the surface of the heating surface is flushed. This method can only remove the thin and loose dust accumulated on the surface of the heating surface, and cannot remove the thick and highly adhesive dust accumulated. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a boiler ash cleaning device for a waste incineration power plant which has a compact structure, is easy to maintain, has high ash cleaning efficiency and high safety.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A boiler ash cleaning device for a waste incineration power plant comprises: a high-pressure water supply component, a particle supply component, a solid-liquid mixer, a flexible connecting pipe and a high-pressure nozzle; the solid-liquid mixer adopts a three-way structure, the input end of the solid-liquid mixer is respectively connected to the high-pressure water supply component and the particle supply component to achieve high-pressure water and particle mixing to form a high-pressure mixture, the output end of the solid-liquid mixer is connected to the high-pressure nozzle through a retractable flexible connecting pipe to achieve the high-pressure mixture sprayed into the boiler, and the high-pressure jet flow generates high-speed impact and friction on the pipeline of the boiler heating surface, thereby removing the ash with strong adhesion on the boiler heating surface.

[0008] As a further improvement of the utility model, the particle supply assembly includes a conveying hose, a sandblasting pot and a material hopper. The sandblasting pot is connected to the material hopper through a conveying hose, and the material hopper is arranged above the sandblasting pot. The solid material in the material hopper falls into the sandblasting pot through the conveying hose by its own gravity. The sandblasting pot is connected to a solid-liquid mixer to spray the solid material into the solid-liquid mixer and mix it with high-pressure water.

[0009] As a further improvement of the utility model, the high-pressure water supply assembly includes: a water tank, a high-pressure hose and a high-pressure water pump. The input end of the high-pressure water pump is connected to the water tank through the high-pressure hose, and the output end of the high-pressure water pump is connected to the solid-liquid mixer through the high-pressure hose to achieve high-pressure water spraying into the solid-liquid mixer to mix with solid materials.

[0010] As a further improvement of the utility model, the high-pressure water supply assembly also includes a safety valve, which is arranged on the high-pressure hose and located between the output end of the high-pressure water pump and the solid-liquid mixer for emergency pressure relief of the high-pressure water pump.

[0011] As a further improvement of the utility model, the high-pressure water supply assembly also includes a pressure regulating valve, which is arranged on the high-pressure hose and located between the safety valve and the solid-liquid mixer to adjust the amount of high-pressure water entering the solid-liquid mixer.

[0012] As a further improvement of the present invention, the high-pressure water supply assembly also includes a return pipe, the input end of the return pipe is connected to the pressure regulating valve, and the output end of the return pipe is connected to the water tank to enable the high-pressure water diverted in the pressure regulating valve to flow back to the water tank.

[0013] As a further improvement of the utility model, the high-pressure water supply assembly also includes a foot valve, which is arranged on the high-pressure hose and located between the pressure regulating valve and the solid-liquid mixer to control the on and off of the high-pressure nozzle.

[0014] As a further improvement of the utility model, the high-pressure nozzle is made of hard alloy material.

[0015] As a further improvement of the utility model, the solid-liquid mixer adopts a Venturi tube.

[0016] Compared with the prior art, the advantages of the utility model are:

[0017] The utility model discloses a boiler ash cleaning device for a waste incineration power plant, which comprises a main structure of the boiler ash cleaning device through a high-pressure water supply component, a particle supply component, a solid-liquid mixer, a flexible connecting pipe and a high-pressure nozzle, and has the characteristics of compact structure, convenient assembly and disassembly, high flexibility in use, etc. Specifically, the solid-liquid mixer adopts a three-way structure, and the input end of the solid-liquid mixer is respectively connected to the high-pressure water supply component and the particle supply component, so that high-pressure water and solid particles are mixed in the solid-liquid mixer to form a high-pressure mixture, and the output end of the solid-liquid mixer is connected to the high-pressure nozzle through a retractable flexible connecting pipe. , that is, the high-pressure mixture is sprayed into the boiler, and the high-pressure jet flow is used to generate high-speed impact and friction on the pipes of the boiler heating surface, thereby removing the highly adhesive ash on the boiler heating surface; the solid-liquid mixer is connected to the high-pressure nozzle by a retractable soft connecting pipe, which improves the movement flexibility of the high-pressure nozzle, and the high-pressure mixture can be accurately sprayed into the pipes that need to be cleaned, which is convenient for cleaning the ash on the second channel, the third channel and the horizontal flue heating surface pipes in the boiler. It has a wide range, significantly improves the cleaning effect of the boiler, and ensures the stable and reliable operation of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a schematic diagram of the structural principle of a boiler ash cleaning device for a waste incineration power plant in a specific embodiment of the present invention.

[0019] Figure 2 The figure is a schematic diagram of the arrangement principle of the dust cleaning device in the boiler in a specific embodiment of the utility model.

[0020] Legend: 1. Water tank; 2. High-pressure hose; 3. High-pressure water pump; 4. Safety valve; 5. Pressure regulating valve; 6. Reflux pipe; 7. Solid-liquid mixer; 8. Delivery hose; 9. Sandblasting pot; 10. Flexible connecting pipe; 11. High-pressure nozzle; 12. Material hopper; 13. First channel; 14. Second channel; 15. Third channel; 16. Horizontal flue; 17. Evaporator; 18. High-temperature superheater; 19. Foot valve. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0022] Example

[0023] like Figure 1 and Figure 2As shown, the utility model of the boiler ash cleaning device for a waste incineration power plant includes: a high-pressure water supply component, a particle supply component, a solid-liquid mixer 7, a flexible connecting pipe 10 and a high-pressure nozzle 11. The solid-liquid mixer 7 adopts a three-way structure, and the input end of the solid-liquid mixer 7 is respectively connected to the high-pressure water supply component and the particle supply component to achieve the mixing of high-pressure water and particles to form a high-pressure mixture. The output end of the solid-liquid mixer 7 is connected to the high-pressure nozzle 11 through a retractable flexible connecting pipe 10 to achieve the high-pressure mixture. The high-pressure mixture is sprayed into the boiler, and the high-pressure jet flow generates high-speed impact and friction on the pipeline of the boiler heating surface, thereby removing the ash with strong adhesion on the boiler heating surface. Further, the flexible connecting pipe 10 is used to drive the high-pressure nozzle 11 to move, so as to clean the surface dirt, oxide layer and old coating and other ash in the heating surface pipelines such as the first channel 13, the second channel 14, the third channel 15, the horizontal flue 16, the evaporator 17 and the high-temperature superheater 18 in the boiler. The waste generated by cleaning the boiler is discharged into the ash conveying device through the bottom of the boiler and then discharged through the slag discharger.

[0024] In this embodiment, the main structure of the boiler dust removal device is formed by a high-pressure water supply component, a particle supply component, a solid-liquid mixer 7, a flexible connecting pipe 10 and a high-pressure nozzle 11, which has the characteristics of compact structure, convenient disassembly and assembly, high flexibility in use, etc. Specifically, the solid-liquid mixer 7 adopts a three-way structure, and the input end of the solid-liquid mixer 7 is connected to the high-pressure water supply component and the particle supply component respectively, so that high-pressure water and solid particles are mixed in the solid-liquid mixer 7 to form a high-pressure mixture, and the output end of the solid-liquid mixer 7 is connected to the high-pressure nozzle 11 through a retractable flexible connecting pipe 10, that is, the high-pressure mixture is sprayed into the boiler, and the high-pressure jet flow is used to generate high-speed impact and friction on the pipe of the boiler heating surface, thereby removing the ash with strong adhesion on the boiler heating surface. By adopting a retractable soft connecting pipe 10 to connect the solid-liquid mixer 7 with the high-pressure nozzle 11, the movement flexibility of the high-pressure nozzle 11 is improved, and the high-pressure mixture can be accurately sprayed into the pipe that needs to be cleaned, which is convenient for cleaning the accumulated ash in the second channel, the third channel and the horizontal flue heating surface pipe in the boiler. It has a wide application range, significantly improves the cleaning effect of the boiler, and ensures the stable and reliable operation of the boiler.

[0025] In this embodiment, the particle supply assembly is arranged above the boiler, and the particle supply assembly includes a conveying hose 8, a sandblasting pot 9 and a material hopper 12. The sandblasting pot 9 is connected to the material hopper 12 through the conveying hose 8, and the material hopper 12 is arranged above the sandblasting pot 9. The solid material in the material hopper 12 falls into the sandblasting pot 9 through the conveying hose 8 by its own gravity, and no additional power components are required. The sandblasting pot 9 is connected to the solid-liquid mixer 7 to enable the solid material to be sprayed into the solid-liquid mixer 7 and mixed with high-pressure water.

[0026] In this embodiment, a solid-liquid mixer 7 and a sandblasting tank 9 can be set at a fixed position in the boiler workshop, and a conveying hose 8 and a material hopper 12 can be set above the boiler through a traveling moving mechanism. Figure 2 By moving the conveying hose 8 and the material hopper 12 to the preset position and connecting them with the sandblasting pot 9 and the solid-liquid mixer 7, the boiler can be cleaned quickly and conveniently, and the operation of the staff can be prevented from being affected by the long moving distance of the soft connecting pipe 10.

[0027] In this embodiment, the high-pressure water supply assembly includes: a water tank 1, a high-pressure hose 2 and a high-pressure water pump 3. The input end of the high-pressure water pump 3 is connected to the water tank 1 through the high-pressure hose 2, and the output end of the high-pressure water pump 3 is connected to the solid-liquid mixer 7 through the high-pressure hose 2, so that high-pressure water is sprayed into the solid-liquid mixer 7 to mix with the solid material. The water is compressed into a high-pressure water flow by the high-pressure water pump 3, and the pressure of the high-pressure water pump 3 can reach 100-1000bar.

[0028] In this embodiment, the high-pressure water supply assembly further includes a safety valve 4. The safety valve 4 is provided on the high-pressure hose 2 and is located between the output end of the high-pressure water pump 3 and the solid-liquid mixer 7, so as to be used for emergency pressure relief of the high-pressure water pump 3. When the pressure of the high-pressure water pump 3 exceeds a predetermined value, the safety valve 4 is opened to relieve pressure, thereby improving the safety of the use of the dust cleaning device.

[0029] In this embodiment, the high-pressure water supply assembly further includes a pressure regulating valve 5 and a return pipe 6. The pressure regulating valve 5 is arranged on the high-pressure hose 2 and is located between the safety valve 4 and the solid-liquid mixer 7 to adjust the amount of high-pressure water entering the solid-liquid mixer 7. The input end of the return pipe 6 is connected to the pressure regulating valve 5, and the output end of the return pipe 6 is connected to the water tank 1 to realize the return of the high-pressure water diverted in the pressure regulating valve 5 to the water tank 1. The pressure regulating valve 5 can specifically adopt a ball valve, which has the characteristics of simple structure, convenient operation, and precise control.

[0030] In this embodiment, the purpose of automatically expanding the working pressure of the high-pressure nozzle 11 is achieved by controlling the bypass water flow. When the pressure in the system exceeds the preset value, the pressure regulating valve 5 will be partially opened; the higher the valve opening lift, the more water will be bypassed, and the smaller the flow rate of the high-pressure nozzle 11 will be.

[0031] In this embodiment, the high-pressure water supply assembly further includes a foot valve 19. The foot valve 19 is disposed on the high-pressure hose 2 and is located between the pressure regulating valve 5 and the solid-liquid mixer 7 to control the on and off of the high-pressure nozzle 11. The dust cleaning operator can control the foot valve 19 by foot movements, thereby controlling the high-pressure nozzle 11, which is convenient for operation.

[0032] In this embodiment, the solid-liquid mixer 7 is a metal venturi tube, which has the characteristics of simple structure and good solid-liquid mixing effect. The high-pressure nozzle 11 is made of hard alloy material and can withstand the impact of high-pressure water flow and abrasive.

[0033] Before cleaning, first connect the conveying hose 8 to the solid-liquid mixer 7, and fill the material hopper 12 with materials. The materials will fall into the sandblasting tank 9 due to their own weight. According to the heating surface pipeline to be cleaned, select a suitable high-pressure nozzle 11, use the high-pressure water pump 3 as the power source, and pump high-pressure water into the solid-liquid mixer 7. In the solid-liquid mixer 7, water and solid materials are mixed, and the high-pressure nozzle 11 is connected through a retractable soft connecting pipe 10. Finally, a high-pressure jet stream is formed, and the jet stream will produce high-speed impact and friction on the pipeline of the heating surface, thereby achieving the effect of removing the ash with strong adhesion on the surface of the heating surface. The boiler cleaning device of this embodiment adopts a water sandblasting process, which has a greater cleaning force than a high-pressure water gun, and can be applied to all waste incineration power plants that are shut down for maintenance. It has the characteristics of high safety, simple operation, good cleaning effect, and a wide range of application, and can meet any complex working conditions.

[0034] Although the utility model is disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any technician familiar with the art can use the above disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the utility model without departing from the spirit and technical solution of the utility model, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of protection of the technical solution of the utility model.

Claims

1. A boiler ash cleaning device for a waste incineration power plant, characterized in that: include: A high-pressure water supply component, a particle supply component, a solid-liquid mixer (7), a flexible connecting pipe (10) and a high-pressure nozzle (11); the solid-liquid mixer (7) adopts a three-way structure, the input end of the solid-liquid mixer (7) is respectively connected to the high-pressure water supply component and the particle supply component to achieve mixing of high-pressure water and particles to form a high-pressure mixture, the output end of the solid-liquid mixer (7) is connected to the high-pressure nozzle (11) through a retractable flexible connecting pipe (10) to achieve the high-pressure mixture sprayed into the boiler, and the high-speed impact and friction are generated on the pipeline of the boiler heating surface by the high-pressure jet flow, thereby removing the highly adhesive ash on the boiler heating surface.

2. The boiler ash cleaning device for a waste incineration power plant according to claim 1 is characterized in that: The particle supply assembly comprises a conveying hose (8), a sandblasting pot (9) and a material hopper (12); the sandblasting pot (9) and the material hopper (12) are connected via the conveying hose (8), and the material hopper (12) is arranged above the sandblasting pot (9); solid material in the material hopper (12) falls into the sandblasting pot (9) via the conveying hose (8) by its own gravity; the sandblasting pot (9) is connected to a solid-liquid mixer (7) so that the solid material is sprayed into the solid-liquid mixer (7) and mixed with high-pressure water.

3. The boiler ash cleaning device for a waste incineration power plant according to claim 2 is characterized in that: The high-pressure water supply assembly comprises: a water tank (1), a high-pressure hose (2) and a high-pressure water pump (3); the input end of the high-pressure water pump (3) is connected to the water tank (1) via the high-pressure hose (2); the output end of the high-pressure water pump (3) is connected to the solid-liquid mixer (7) via the high-pressure hose (2), so that the high-pressure water is sprayed into the solid-liquid mixer (7) to mix with the solid material.

4. The boiler ash cleaning device for a waste incineration power plant according to claim 3 is characterized in that: The high-pressure water supply assembly further comprises a safety valve (4), which is arranged on the high-pressure hose (2) and located between the output end of the high-pressure water pump (3) and the solid-liquid mixer (7) for emergency pressure relief of the high-pressure water pump (3).

5. The boiler ash cleaning device for a waste incineration power plant according to claim 4 is characterized in that: The high-pressure water supply assembly further comprises a pressure regulating valve (5), which is arranged on the high-pressure hose (2) and located between the safety valve (4) and the solid-liquid mixer (7) to adjust the amount of high-pressure water entering the solid-liquid mixer (7).

6. The boiler ash cleaning device for a waste incineration power plant according to claim 5, characterized in that: The high-pressure water supply assembly further comprises a return pipe (6), the input end of the return pipe (6) being connected to the pressure regulating valve (5), and the output end of the return pipe (6) being connected to the water tank (1), so as to enable the high-pressure water diverted from the pressure regulating valve (5) to return to the water tank (1).

7. The boiler ash cleaning device for a waste incineration power plant according to claim 6, characterized in that: The high-pressure water supply assembly further comprises a foot valve (19), which is arranged on the high-pressure hose (2) and located between the pressure regulating valve (5) and the solid-liquid mixer (7) to control the on and off of the high-pressure nozzle (11).

8. The boiler ash cleaning device for a waste incineration power plant according to any one of claims 1 to 7, characterized in that: The high-pressure nozzle (11) is made of hard alloy material.

9. The boiler ash cleaning device for a waste incineration power plant according to any one of claims 1 to 7, characterized in that: The solid-liquid mixer (7) adopts a Venturi tube.

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