A low-nitrogen gas transformation device based on a circulating fluidized bed boiler
By designing pressure relief components, regulating components, connecting components, and filtering components in the circulating fluidized bed boiler, the problem of damage to the main pipe caused by excessive gas pressure in the existing equipment has been solved, achieving smooth gas flow and tight connection, filtering impurities, and improving the stability and efficiency of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI CHENGXING BOILER ENVIRONMENTAL PROTECTION EQUIP INSTALLATION CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-06-02
AI Technical Summary
In existing circulating fluidized bed boiler low-NOx gas retrofit devices, structures such as threaded plates and sliding plates are installed inside the return pipe, which can easily damage the main pipe when the gas pressure is too high.
A modified device including a pressure relief component, an adjustment component, a connection component, and a filter component was designed. The pressure relief component achieves pressure relief by cooperating with a connecting pipe through a slider. The adjustment component adjusts the pressure relief threshold by adjusting a knob. The connection component ensures a tight connection by using a locking ring and a sealing gasket. The filter component filters impurities by using a filter frame and a filter plate.
It effectively prevents the main body from being damaged due to excessive pressure, ensures smooth gas flow, adjusts the pressure relief threshold through the regulating component, ensures a tight connection through the connecting component, and prevents the accumulation of dust and impurities through the filter component.
Smart Images
Figure CN224316159U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of circulating fluidized bed boiler technology, and in particular to a low-NOx gas retrofit device for circulating fluidized bed boilers. Background Technology
[0002] Circulating fluidized bed boilers utilize the most advanced clean coal combustion technology in industrial applications. The main structure of a circulating fluidized bed boiler consists of two parts: a combustion chamber (including a dense phase zone and a dilute phase zone) and a circulating return system (including a high-temperature gas-solid separator and a return material system).
[0003] In the existing technology, there is a low-NOx gas retrofit device for a circulating fluidized bed boiler with application number CN202320799095.2. This application installs a spring between a threaded plate and a sliding plate, so that the sliding plate is in contact with the vent plate under the action of the spring force. When the gas pressure is too high, the gas passes through the vent plate and presses against the sliding plate, causing the sliding plate to move towards the buffer hole and directly contact the buffer hole. Excess gas in the return pipe flows into the cooling pipes on both sides through the vent plate and the buffer hole, avoiding the problem of excessive gas entering the main pipeline directly through the return pipe and causing damage.
[0004] In actual use, the following shortcomings were found in this device:
[0005] Since the threaded plate and sliding plate are both installed inside the return pipe;
[0006] Therefore, this application provides a low-NOx gas retrofit device for circulating fluidized bed boilers to meet the requirements. Utility Model Content
[0007] The purpose of this utility model is to solve the problems existing in the above-mentioned background technology, and to propose a low-NOx gas retrofit device for circulating fluidized bed boilers.
[0008] The technical problem to be solved by this utility model is to provide a low-NOx gas retrofit device for circulating fluidized bed boilers to solve the problem of an existing low-NOx gas retrofit device for circulating fluidized bed boilers.
[0009] To solve the above-mentioned technical problems, this utility model provides the following technical solution:
[0010] A low-NOx fuel conversion device for a circulating fluidized bed boiler includes a main pipe, with a connecting pipe snapped onto the front end of the main pipe:
[0011] Pressure relief assembly, which is installed on the left and right sides of the main body, is used to relieve pressure on the main body;
[0012] The pressure relief assembly includes:
[0013] Pressure relief pipes are fixedly installed on the left and right sides of the main body. A fixing plate is fixedly installed inside the pressure relief pipe on the side away from the central axis. A stabilizing frame is fixedly installed inside the pressure relief pipe on the side close to the central axis. A slider is slidably connected to the outside of the stabilizing frame. A threaded rod is rotatably connected to the fixing plate on the side close to the central axis.
[0014] Preferably, a spring is sleeved on the outside of the threaded rod, a connecting pipe is fixedly installed inside the fixing plate, and a through groove is opened on the outside of the connecting pipe.
[0015] Preferred options also include:
[0016] An adjustment component, installed inside the pressure relief component, is used to regulate the pressure relief threshold of the pressure relief component.
[0017] Preferably, the adjustment component includes:
[0018] A slide rod is fixedly installed between the stabilizer and the fixed plate. An adjusting block is slidably connected to the outside of the slide rod. A first bevel gear is fixedly installed on the outside of the threaded rod. A second bevel gear meshes with the rear end of the first bevel gear. An adjusting knob is rotatably connected to the rear end of the pressure relief pipe.
[0019] Preferred options also include:
[0020] A connecting component, which is installed on the outside of the main body, is used to connect the main body to the connecting pipe.
[0021] Preferably, the connection component includes:
[0022] A locking ring is rotatably connected to the outside of the main body. A sealing gasket is adhered inside the locking ring, and the locking ring is threadedly connected to the connecting pipe.
[0023] Preferred options also include:
[0024] A filter assembly, installed inside the connecting pipe, is used to filter the gas entering the connecting pipe.
[0025] Preferably, the filtering component includes:
[0026] A locking block is fixedly installed inside the front end of the connecting pipe. A filter frame is slidably connected to the outside of the locking block. A limit ring is fixedly installed inside the connecting pipe at the rear end of the filter frame. A slot is opened on the outside of the filter frame. A filter plate is fixedly installed inside the filter frame.
[0027] Compared with the prior art, this utility model has at least the following beneficial effects:
[0028] In the above scheme, the pressure relief component is set up to relieve pressure on the main body by cooperating with the slider and the connecting pipe, so as to avoid damage to the main body due to excessive internal pressure. At the same time, the inside of the main body is unobstructed, ensuring smooth gas flow. Meanwhile, the adjustment component is adjusted by cooperating with the adjustment knob and the threaded rod to adjust the pressure intensity required to push the slider, so as to facilitate the adjustment of the pressure relief threshold of the pressure relief component according to the working requirements.
[0029] In the above scheme, the connecting component uses a locking ring and a sealing gasket to connect the connecting pipe and the main body, ensuring the tightness of the connection between the connecting pipe and the main body. At the same time, the filter component uses a filter frame and a filter plate to facilitate the filtration of the gas entering the connecting pipe, preventing dust and impurities from accumulating inside the connecting pipe. Attached Figure Description
[0030] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the art to implement and use the present disclosure.
[0031] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0032] Figure 2 This is a cross-sectional view of the overall structure of this utility model;
[0033] Figure 3 This is a perspective view of the filter frame in this utility model;
[0034] Figure 4 This is a cross-sectional view of the connecting pipe in this utility model;
[0035] Figure 5 This is a perspective view of the slider in this utility model.
[0036] [Figure Labels]
[0037] 1. Main body; 2. Connecting pipe; 3. Pressure relief assembly; 301. Pressure relief pipe; 302. Fixing plate; 303. Stabilizer; 304. Slider; 305. Threaded rod; 306. Spring; 307. Connecting pipe; 308. Through groove; 4. Adjustment assembly; 401. Slide rod; 402. Adjusting block; 403. First bevel gear; 404. Second bevel gear; 405. Adjustment knob; 5. Connecting assembly; 501. Locking ring; 502. Sealing gasket; 6. Filter assembly; 601. Locking block; 602. Filter frame; 603. Limiting ring; 604. Locking groove; 605. Filter plate.
[0038] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiment of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation
[0039] 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 protection scope of the present utility model.
[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0041] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The device shown is a low-NOx gas retrofit device for a circulating fluidized bed boiler, comprising a main pipe body 1, a pressure relief assembly 3, an adjustment assembly 4, a connecting assembly 5, and a filter assembly 6. The front end of the main pipe body 1 is connected to a connecting pipe 2. The pressure relief assembly 3 is installed on the left and right sides of the main pipe body 1 for relieving pressure on the main pipe body 1. The adjustment assembly 4 is installed inside the pressure relief assembly 3 for regulating the pressure relief threshold of the pressure relief assembly 3. The connecting assembly 5 is installed on the outside of the main pipe body 1 for connecting the main pipe body 1 and the connecting pipe 2. The filter assembly 6 is installed inside the connecting pipe 2 for filtering the gas entering the connecting pipe 2.
[0042] In this embodiment, as Figure 1 , Figure 4 and Figure 5As shown: The pressure relief assembly 3 includes: a pressure relief pipe 301 fixedly installed on the left and right sides of the main body 1; a fixed plate 302 fixedly installed on the side of the pressure relief pipe 301 away from the central axis; a stabilizer 303 fixedly installed on the side of the pressure relief pipe 301 close to the central axis; a slider 304 slidably connected to the outside of the stabilizer 303; a threaded rod 305 rotatably connected to the side of the fixed plate 302 close to the central axis; a spring 306 sleeved on the outside of the threaded rod 305; a connecting pipe 307 fixedly installed inside the fixed plate 302; a through groove 308 opened on the outside of the connecting pipe 307; the adjustment assembly 4 includes: a slide rod 401 fixedly installed between the stabilizer 303 and the fixed plate 302; an adjustment block 402 slidably connected to the outside of the slide rod 401; a first bevel gear 403 fixedly installed on the outside of the threaded rod 305; a second bevel gear 404 meshing at the rear end of the first bevel gear 403; and an adjustment knob 405 rotatably connected to the rear end of the pressure relief pipe 301.
[0043] Furthermore, in the above embodiment, when the internal gas pressure of the main pipe 1 is too high, the gas compresses the slider 304 inside the pressure relief pipe 301, pushing the slider 304 to slide on the stabilizer 303 and compressing the spring 306. As the slider 304 slides, it also slides synchronously on the connecting pipe 307, connecting the through groove 308 on the connecting pipe 307 to the main pipe 1, thus connecting the main pipe 1 to the pressure relief pipe 301. This relieves the pressure on the main pipe 1, preventing damage to the main pipe 1 due to excessive internal pressure. Simultaneously, it ensures unobstructed gas flow within the main pipe 1. When it is necessary to adjust the pressure relief threshold of the pressure relief component 3, rotate the adjustment knob 405, which drives the second bevel gear 404 to rotate. The second bevel gear 404 meshes with the first bevel gear 403. The rotation of the second bevel gear 404 drives the first bevel gear 403 to rotate, which in turn drives the threaded rod 305 to rotate. The rotation of the threaded rod 305 drives the adjustment block 402 to slide outside the slide rod 401. The adjustment block 402 slides and compresses the spring 306, adjusting the pressure intensity required to push the slider 304, so as to facilitate the adjustment of the pressure relief threshold of the pressure relief component 3 according to the working requirements.
[0044] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown: the connecting component 5 includes a locking ring 501 rotatably connected to the outside of the main body 1, a sealing gasket 502 is bonded inside the locking ring 501, and the locking ring 501 is threadedly connected to the connecting pipe 2. The filter component 6 includes a locking block 601 fixedly installed inside the front end of the connecting pipe 2, a filter frame 602 slidably connected to the outside of the locking block 601, a limit ring 603 fixedly installed inside the connecting pipe 2 at the rear end of the filter frame 602, a slot 604 is opened on the outside of the filter frame 602, and a filter plate 605 is fixedly installed inside the filter frame 602.
[0045] Further, in the above embodiments, when connecting the main body 1 and the connecting pipe 2, the locking ring 501 is rotated to the outside of the connecting pipe 2. At the same time, the locking ring 501 is rotated to drive the connecting pipe 2 to fit with the main body 1, so that the connecting pipe 2 and the sealing gasket 502 are tightly attached, thereby realizing the connection between the connecting pipe 2 and the main body 1 and ensuring the tightness of the connection between the connecting pipe 2 and the main body 1. At the same time, the filter frame 602 installed in the connecting pipe 2 filters the gas that backflows into the connecting pipe 2. The filter plate 605 on the filter frame 602 intercepts impurities and dust in the gas. At the same time, the locking block 601 is locked into the locking groove 604 in the filter frame 602, and the filter frame 602 fits with the limiting ring 603, which facilitates the filtration of the gas entering the connecting pipe 2 and prevents dust and impurities from accumulating in the connecting pipe 2.
[0046] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.
[0047] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A device for retrofitting a circulating fluidized bed boiler with low-NOx fuel gas, characterized in that, Includes a main body (1), the front end of which is snapped with a connecting pipe (2): Pressure relief assembly (3), which is installed on the left and right sides of the main body (1) and is used to relieve pressure on the main body (1); The pressure relief assembly (3) includes: Pressure relief pipes (301) are fixedly installed on the left and right sides of the main body (1). A fixing plate (302) is fixedly installed inside the pressure relief pipe (301) on the side away from the central axis. A stabilizing frame (303) is fixedly installed inside the pressure relief pipe (301) on the side close to the central axis. A slider (304) is slidably connected to the outside of the stabilizing frame (303). A threaded rod (305) is rotatably connected to the fixing plate (302) on the side close to the central axis.
2. The low-NOx fuel gas retrofit device for a circulating fluidized bed boiler according to claim 1, characterized in that: A spring (306) is sleeved on the outside of the threaded rod (305), and a connecting pipe (307) is fixedly installed inside the fixing plate (302). A through groove (308) is opened on the outside of the connecting pipe (307).
3. The low-NOx fuel gas retrofit device for a circulating fluidized bed boiler according to claim 2, characterized in that, Also includes: Adjustment component (4), which is installed inside pressure relief component (3), is used to regulate the pressure relief threshold of pressure relief component (3).
4. The low-NOx fuel gas retrofit device for a circulating fluidized bed boiler according to claim 3, characterized in that, The adjustment component (4) includes: A slide rod (401) is fixedly installed between the stabilizer (303) and the fixed plate (302). An adjusting block (402) is slidably connected to the outside of the slide rod (401). A first bevel gear (403) is fixedly installed on the outside of the threaded rod (305). A second bevel gear (404) meshes with the rear end of the first bevel gear (403). An adjusting knob (405) is rotatably connected to the rear end of the pressure relief pipe (301).
5. A low-NOx fuel gas retrofit device for a circulating fluidized bed boiler according to claim 1, characterized in that, Also includes: A connecting component (5) is installed on the outside of the main body (1) for connecting the main body (1) and the connecting pipe (2).
6. A low-NOx fuel gas retrofit device for a circulating fluidized bed boiler according to claim 5, characterized in that, The connection component (5) includes: A locking ring (501) is rotatably connected to the outside of the main body (1). A sealing gasket (502) is bonded inside the locking ring (501). The locking ring (501) is threadedly connected to the connecting pipe (2).
7. A low-NOx fuel gas retrofit device for a circulating fluidized bed boiler according to claim 1, characterized in that, Also includes: The filter assembly (6) is installed inside the connecting pipe (2) and is used to filter the gas entering the connecting pipe (2).
8. A low-NOx fuel gas retrofit device for a circulating fluidized bed boiler according to claim 7, characterized in that, The filtering component (6) includes: A locking block (601) is fixedly installed inside the front end of the connecting pipe (2). A filter frame (602) is slidably connected to the outside of the locking block (601). A limiting ring (603) is fixedly installed inside the connecting pipe (2) at the rear end of the filter frame (602). A slot (604) is opened on the outside of the filter frame (602). A filter plate (605) is fixedly installed inside the filter frame (602).