A retrofit device for biomass combustion in a circulating fluidized bed coal-fired boiler.

Abstract

This utility model provides a device for retrofitting a circulating fluidized bed coal-fired boiler to burn biomass, relating to the technical field of circulating fluidized bed coal-fired boilers. The device includes a circulating fluidized bed coal-fired boiler with a connecting pipe fixedly connected to its top. By installing a buffer box at the top of the boiler and connecting it to a purification box via a first and second exhaust pipe, and by incorporating a sealing adjustment component inside the buffer box, the device allows for rapid adjustment of the sealing state of the first and second exhaust pipes when cleaning is required. This ensures that the circulating fluidized bed coal-fired boiler can be cleaned without shutting down, thereby maintaining its operating efficiency and facilitating practical applications.

Description

Technical Field

[0001] This utility model relates to the field of circulating fluidized bed coal-fired boiler technology, specifically to a modification device for circulating fluidized bed coal-fired boilers to burn biomass. Background Technology

[0002] A circulating fluidized bed coal-fired boiler is a type of boiler that uses fluidized bed combustion technology and is mainly used in coal-fired power generation and heating. Its core feature is that it achieves a highly efficient and clean combustion process through the circulating combustion of high-temperature solid particles.

[0003] In existing circulating fluidized bed coal-fired boilers, the exhaust gas generated during operation needs to be discharged through pipelines to purification equipment for treatment. Since the exhaust gas contains a certain amount of impurities and dust, the exhaust pipelines need to be cleaned regularly. However, existing circulating fluidized bed coal-fired boilers only have one exhaust pipeline, which means that cleaning the exhaust pipeline requires shutting down the boiler, significantly reducing its operating efficiency and hindering practical application.

[0004] Therefore, those skilled in the art provide a modification device for burning biomass in a circulating fluidized bed coal-fired boiler to solve the problems mentioned in the background art. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a modification device for biomass combustion in circulating fluidized bed coal-fired boilers. This solves the problem mentioned in the background section where existing circulating fluidized bed coal-fired boilers only have one exhaust pipe, which necessitates shutting down the boiler when cleaning the exhaust pipe, significantly reducing its operating efficiency.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a modification device for burning biomass in a circulating fluidized bed coal-fired boiler, comprising a circulating fluidized bed coal-fired boiler, a connecting pipe fixedly connected to the top of the circulating fluidized bed coal-fired boiler, a buffer box fixedly connected to the top of the connecting pipe, a closed adjustment component being provided inside the buffer box, a first exhaust pipe and a second exhaust pipe being detachably installed on the top of the buffer box, a purification box being installed on one side of the circulating fluidized bed coal-fired boiler, and the ends of the first exhaust pipe and the second exhaust pipe away from the buffer box extending into the interior of the purification box and being detachably connected to the purification box; The sealing adjustment assembly is used to adjust the sealing state of the first exhaust pipe and the second exhaust pipe.

[0007] The above technical solution involves installing a buffer box at the top of the circulating fluidized bed coal-fired boiler, connecting the buffer box to the purification box via the first and second exhaust pipes. Furthermore, by installing a sealing adjustment component inside the buffer box, the sealing state of the first and second exhaust pipes can be quickly adjusted when cleaning is required. This ensures that the circulating fluidized bed coal-fired boiler can complete the cleaning operation without shutting down, thereby guaranteeing the boiler's operating efficiency and facilitating practical applications.

[0008] Preferably, the closed adjustment assembly is used to adjust the cylinder and the sealing plug. The adjustment cylinder is installed on the outside of the buffer box, the piston rod of the adjustment cylinder extends into the inside of the buffer box, and the sealing plug is installed on the piston rod of the adjustment cylinder and is slidably connected to the inner wall of the buffer box.

[0009] Through the above technical solution, by adjusting the operation of the cylinder, the position of the sealing plug inside the buffer box can be adjusted, thereby sealing the first exhaust pipe or the second exhaust pipe, which facilitates the disassembly and cleaning of the first exhaust pipe or the second exhaust pipe.

[0010] Preferably, the purification box contains an alkaline liquid, and the bottoms of the first exhaust pipe and the second exhaust pipe are both located below the surface of the alkaline liquid.

[0011] The above technical solution utilizes alkaline liquid to treat the discharged waste gas, which can effectively absorb sulfur-containing gases.

[0012] Preferably, a discharge pipe is installed on one side of the top of the purification box.

[0013] The above technical solution allows for the discharge of treated waste gas via a discharge pipe, while also facilitating the addition of alkaline liquid to the purification box.

[0014] Preferably, a drain pipe is installed on one side of the bottom of the purification box, and a valve is installed on the drain pipe.

[0015] The above technical solution allows for the convenient discharge of alkaline liquid that needs to be replaced from inside the purification box using a drain pipe, while a valve can control the opening and closing of the drain pipe.

[0016] Preferably, the bottom of the inner wall of the purification box is set as a 15-degree slope, and the lowest point of the slope is located on one side of the drain pipe.

[0017] By utilizing the above technical solution, the inclined plane, in conjunction with the drain pipe, allows the alkaline liquid inside the purification box to be fully discharged.

[0018] Preferably, the side of the buffer box away from the adjusting cylinder is connected to a sealing cover by screws.

[0019] The above technical solution allows for the sealing of one side of the buffer box using a sealing cover, while opening the sealing cover facilitates the cleaning of dust inside the buffer box.

[0020] This utility model provides a retrofit device for biomass combustion in a circulating fluidized bed coal-fired boiler, which has the following beneficial effects: This equipment for retrofitting a circulating fluidized bed coal-fired boiler to burn biomass features a buffer box installed at the top of the boiler. The buffer box is connected to a purification box via a first and second exhaust pipe. Furthermore, a sealing adjustment component is installed inside the buffer box, allowing for rapid adjustment of the sealing state of the first and second exhaust pipes when cleaning is required. This ensures that the circulating fluidized bed coal-fired boiler can be cleaned without shutting down, thus maintaining its operating efficiency and facilitating practical applications. Attached Figure Description

[0021] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention; Figure 2 This is a second-view perspective three-dimensional structural diagram of the present invention; Figure 3 This is a cross-sectional schematic diagram of the circulating fluidized bed coal-fired boiler after the present invention is removed; Figure 4 This is a schematic diagram showing the disassembled structure of the buffer box and sealing cover of this utility model.

[0022] In the diagram: 1. Circulating fluidized bed coal-fired boiler; 2. Connecting pipe; 3. Buffer tank; 4. First exhaust pipe; 5. Second exhaust pipe; 6. Purification box; 7. Adjusting cylinder; 8. Sealing plug; 9. Discharge pipe; 10. Drain pipe; 11. Valve; 12. Sealing cover. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] Reference Figures 1-4 This utility model provides a modification device for a circulating fluidized bed coal-fired boiler to burn biomass. The device includes a circulating fluidized bed coal-fired boiler 1, with a connecting pipe 2 fixedly connected to the top of the boiler 1. A buffer tank 3 is fixedly connected to the top of the connecting pipe 2. Exhaust gas generated inside the circulating fluidized bed coal-fired boiler 1 is introduced into the buffer tank 3 through the connecting pipe 2. A first exhaust pipe 4 and a second exhaust pipe 5 are detachably installed on the top of the buffer tank 3, allowing the exhaust gas introduced into the buffer tank 3 to be discharged.

[0025] A purification box 6 is installed on one side of the circulating fluidized bed coal-fired boiler 1. The ends of the first exhaust pipe 4 and the second exhaust pipe 5, away from the buffer tank 3, both extend into the purification box 6 and are detachably connected to it, facilitating the discharge of waste gas from the buffer tank 3 into the purification box 6. The purification box 6 contains an alkaline liquid. The bottoms of the first exhaust pipe 4 and the second exhaust pipe 5 are both below the surface of the alkaline liquid, allowing for the treatment of the discharged waste gas and effective absorption of sulfur-containing gases. A discharge pipe 9 is installed on one side of the top of the purification box 6, allowing for the discharge of treated waste gas and the convenient addition of alkaline liquid into the purification box 6. A drain pipe 10 is installed on one side of the bottom of the purification box 6, with a valve 11 installed on it. The drain pipe 10 allows for the convenient discharge of alkaline liquid that needs to be replaced from the purification box 6, while the valve 11 controls the opening and closing of the drain pipe 10. The bottom of the inner wall of the purification box 6 is set as a 15-degree slope, with the lowest point of the slope located on one side of the drain pipe 10. By using the slope in conjunction with the drain pipe 10, the alkaline liquid inside the purification box 6 can be fully discharged.

[0026] In one aspect of this embodiment, a sealing adjustment assembly is provided inside the buffer box 3. The sealing adjustment assembly is used to adjust the sealing state of the first exhaust pipe 4 and the second exhaust pipe 5. The sealing adjustment assembly is used to adjust the cylinder 7 and the sealing plug 8. The adjusting cylinder 7 is installed on the outside of the buffer box 3, and its piston rod extends into the interior of the buffer box 3. The sealing plug 8 is installed on the piston rod of the adjusting cylinder 7 and is slidably connected to the inner wall of the buffer box 3. By operating the adjusting cylinder 7, the position of the sealing plug 8 inside the buffer box 3 can be adjusted, thereby sealing the first exhaust pipe 4 or the second exhaust pipe 5, facilitating the disassembly and cleaning of the first exhaust pipe 4 or the second exhaust pipe 5. A sealing cover 12 is connected to the side of the buffer box 3 away from the adjusting cylinder 7 by screws. The sealing cover 12 seals one side of the buffer box 3, and opening the sealing cover 12 facilitates cleaning of dust inside the buffer box 3.

[0027] Working principle: When using it, first place the device as follows: Figure 1 Install as shown, and connect the adjusting cylinder 7 to the external control device. Then, adjust the position of the sealing plug 8 inside the buffer box 3 by adjusting the adjusting cylinder 7, thereby sealing one of the first exhaust pipe 4 or the second exhaust pipe 5. When the circulating fluidized bed coal-fired boiler 1 is working, the generated exhaust gas enters the interior of the buffer box 3 through the connecting pipe 2, and then is discharged into the purification box 6 through either the first exhaust pipe 4 or the second exhaust pipe 5. The sulfur-containing gas is then absorbed by the alkaline liquid inside the purification box 6, thereby achieving the purpose of purifying the exhaust gas. The purified exhaust gas is discharged through the discharge pipe 9. When it is necessary to clean either the first exhaust pipe 4 or the second exhaust pipe 5, the operation of the cylinder 7 is adjusted, and the position of the sealing plug 8 inside the buffer box 3 is adjusted to close the exhaust pipe that needs to be cleaned, so that the other exhaust pipe can operate normally. Then the exhaust pipe that needs to be cleaned can be disassembled without stopping the machine, which is beneficial to practical applications. When it is necessary to replace the alkaline liquid, open valve 11, drain the alkaline liquid through drain pipe 10, and add new alkaline liquid through drain pipe 9.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A retrofitting device for the combustion of biomass in a circulating fluidized bed coal-fired boiler, comprising a circulating fluidized bed coal-fired boiler (1), characterized by, The top of the circulating fluidized bed coal-fired boiler (1) is fixedly connected to a connecting pipe (2), and the top of the connecting pipe (2) is fixedly connected to a buffer box (3). The buffer box (3) is equipped with a closed adjustment component. The top of the buffer box (3) is detachably installed with a first exhaust pipe (4) and a second exhaust pipe (5). A purification box (6) is installed on one side of the circulating fluidized bed coal-fired boiler (1). The ends of the first exhaust pipe (4) and the second exhaust pipe (5) away from the buffer box (3) both extend into the interior of the purification box (6) and are detachably connected to the purification box (6). The sealing adjustment assembly is used to adjust the sealing state of the first exhaust pipe (4) and the second exhaust pipe (5).

2. The retrofitting apparatus for burning biomass in a circulating fluidized bed coal-fired boiler according to claim 1, characterized in that: The closed adjustment assembly is used to adjust the cylinder (7) and the sealing plug (8). The adjustment cylinder (7) is installed on the outside of the buffer box (3). The piston rod of the adjustment cylinder (7) extends into the inside of the buffer box (3). The sealing plug (8) is installed on the piston rod of the adjustment cylinder (7) and is slidably connected to the inner wall of the buffer box (3).

3. The retrofitting apparatus for burning biomass in a circulating fluidized bed coal-fired boiler according to claim 1, characterized in that: The purification box (6) contains an alkaline liquid, and the bottoms of the first exhaust pipe (4) and the second exhaust pipe (5) are both located below the surface of the alkaline liquid.

4. The retrofit apparatus for burning biomass in a circulating fluidized bed coal-fired boiler according to claim 1, characterized by: A discharge pipe (9) is installed on one side of the top of the purification box (6).

5. The retrofit apparatus for burning biomass in a circulating fluidized bed coal-fired boiler according to claim 1, characterized by: A drain pipe (10) is installed on one side of the bottom of the purification box (6), and a valve (11) is installed on the drain pipe (10).

6. The retrofitting apparatus for burning biomass in a circulating fluidized bed coal-fired boiler according to claim 5, characterized in that: The bottom of the inner wall of the purification box (6) is set as a 15-degree slope, and the lowest point of the slope is located on one side of the drain pipe (10).

7. The retrofit apparatus for burning biomass in a circulating fluidized bed coal-fired boiler according to claim 2, characterized by: The buffer box (3) is connected to a sealing cover (12) by screws on the side away from the adjusting cylinder (7).

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