A protective device for spray guns in a circulating fluidized bed

Abstract

This utility model relates to the field of circulating fluidized bed spray gun protection technology, and discloses a circulating fluidized bed spray gun protection device, which includes a spray gun body, an anti-wear component, and a flow guiding component. The spray gun body is arranged on a desulfurization tower, with one end penetrating through the outer wall of the desulfurization tower and inserted into the interior of the desulfurization tower, and the other end extending to the outside of the desulfurization tower. An outer ring sleeve is provided on the outer periphery of the spray gun body, and the outer ring sleeve extends along the length direction of the spray gun body. The anti-wear component is arranged on the outer periphery of the outer ring sleeve, and the anti-wear component includes multiple first plates, all of which extend along the length direction of the spray gun body, and the multiple first plates are interconnected to form a protective zone. The flow guiding component is arranged on the end of the spray gun body facing the flue gas and is connected to the anti-wear component. The flow guiding component includes two inclined and interconnected second plates, the cross-section of the two second plates is V-shaped, and the two second plates form a buffer zone, effectively extending the service life of the spray gun body.

Description

Technical Field

[0001] This utility model relates to the field of circulating fluidized bed spray gun protection technology, and in particular to a circulating fluidized bed spray gun protection device. Background Technology

[0002] The circulating fluidized bed desulfurization process aims to efficiently remove pollutants such as sulfur dioxide from flue gas. The desulfurization system mainly consists of key equipment such as absorption tower, spray gun, circulating pump, and oxidation fan. Among them, the spray gun, as one of the core components of the desulfurization system, undertakes the important task of uniformly atomizing the desulfurizing agent and spraying it into the absorption tower to fully mix and contact with the flue gas, which is a key link to achieve efficient desulfurization.

[0003] Currently, circulating fluidized bed spray guns are arranged in the venturi tube acceleration section. The venturi tube is a device designed using fluid dynamics principles. Through its special contraction-expansion structure, it generates an acceleration effect when flue gas flows inside the tube. Traditional circulating fluidized bed spray guns are mostly sleeve structures made of metal materials, which have poor wear resistance. In the venturi tube acceleration section, the flue gas velocity is extremely high, and the high-speed flue gas also contains a large number of solid particles. Such spray guns are in such an environment of continuous scouring by high-speed flue gas and impact by solid particles for a long time, and inevitably suffer severe wear. Severely worn spray guns may experience problems such as desulfurizing agent leakage and spray gun blockage, causing the desulfurization system to fail to operate normally or even completely fail. Utility Model Content

[0004] The technical problem to be solved by this utility model is that traditional circulating fluidized bed spray guns have poor wear resistance and cannot adapt to environments with continuous flue gas scouring and solid particle impact.

[0005] To address the aforementioned technical problems, this utility model provides a circulating fluidized bed spray gun protection device, comprising a spray gun body, an anti-wear component, and a flow guiding component. The spray gun body is arranged on a desulfurization tower, with one end penetrating the outer wall of the desulfurization tower and inserted inside, and the other end extending to the outside of the desulfurization tower. An outer ring sleeve is provided around the outer periphery of the spray gun body, extending along the length direction of the spray gun body. The anti-wear component is disposed around the outer periphery of the outer ring sleeve and includes multiple first plates, all extending along the length direction of the spray gun body, and the multiple first plates are interconnected to form a protective area for placing the spray gun body. The flow guiding component is disposed at the end of the spray gun body facing the incoming flue gas and connected to the anti-wear component. The flow guiding component includes two inclined and interconnected second plates, the cross-section of which is V-shaped, forming a buffer zone to disperse the flue gas in the circulating fluidized bed and prevent the flue gas from directly scouring the spray gun body.

[0006] Furthermore, the outer sleeve, the first plate, and the second plate are all made of stainless steel.

[0007] In one embodiment, the circulating fluidized bed spray gun protection device further includes a support assembly for ensuring that the spray gun body is installed on the desulfurization tower. The support assembly includes a first support frame, and there are two first support frames. The two first support frames are respectively disposed at both ends of the anti-wear assembly and connected to the desulfurization tower.

[0008] In one embodiment, each first support frame includes a first connecting rod and a first abutting part. The first connecting rod is inclinedly disposed on the outer periphery of the anti-wear component. One end of the first connecting rod is connected to the first plate and the other end is connected to the first abutting part. The end of the first abutting part opposite to the first connecting rod is connected to the inner wall of the desulfurization tower.

[0009] In one embodiment, the support assembly further includes a second support frame disposed on the flow guiding assembly and connected to the desulfurization tower.

[0010] In one embodiment, the second support frame includes a second connecting rod and a second abutment. The second connecting rod is inclinedly disposed on the outer wall of the second plate and located at the connection between the two second plates. One end of the second abutment is connected to the end of the second connecting rod away from the second plate, and the other end of the second abutment is connected to the inner wall of the desulfurization tower.

[0011] In one embodiment, both the first abutting part and the second abutting part are attached to the inner wall of the desulfurization tower.

[0012] Furthermore, the outer diameters of both the first abutting portion and the second abutting portion are larger than the outer diameters of both the first connecting rod and the second connecting rod.

[0013] In one embodiment, the first connecting rod, the second connecting rod, the first abutting part, and the second abutting part are all made of stainless steel.

[0014] In one embodiment, the circulating fluidized bed spray gun protection device further includes an inlet water pipe and a return water pipe, with one end of the return water pipe connected to the spray gun body and the other end connected to the inlet water pipe.

[0015] In one embodiment, the inlet pipe has an inlet at the end opposite to the return pipe for introducing process water, and the return pipe has a return outlet for adjusting the pressure of the inlet pipe.

[0016] In one embodiment, the circulating fluidized bed spray gun protection device further includes a nozzle element, which is disposed at the end of the spray gun body away from the return water pipeline and located inside the desulfurization tower. The nozzle element is used to spray process water and compressed air into the interior of the desulfurization tower.

[0017] Compared with the prior art, the beneficial effects of this utility model's circulating fluidized bed spray gun protection device are as follows: The anti-wear component forms a protective zone specifically for the spray gun body by using multiple first plates extending along the length of the spray gun body and interconnected. This design encloses the spray gun body, effectively reducing the direct scouring and wear of the spray gun body by solid particles carried in the flue gas in the circulating fluidized bed, greatly extending the service life of the spray gun body, and reducing equipment costs and downtime maintenance costs caused by frequent replacement of the spray gun body; The two inclined and interconnected second plates of the flow guiding component form a buffer zone. When flue gas from the circulating fluidized bed arrives, the buffer zone can change the flow direction and velocity distribution of the flue gas, allowing the flue gas to be fully dispersed. This dispersion effect avoids the concentrated and high-speed direct scouring of the spray gun body by the flue gas, effectively reducing the damage to the spray gun body caused by the flue gas; This utility model ensures that the spray gun body will not experience problems such as poor atomization and excessively high flue gas temperature caused by wear throughout the entire operating cycle, thereby avoiding the risk of decreased desulfurization efficiency and desulfurization failure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the circulating fluidized bed spray gun protection device according to an embodiment of this utility model.

[0019] Figure 2 This is a front view of the circulating fluidized bed spray gun protection device according to an embodiment of this utility model.

[0020] Figure 3 This is a top view of the circulating fluidized bed spray gun protection device according to an embodiment of this utility model.

[0021] Figure 4 This is a schematic diagram of the operation of the circulating fluidized bed spray gun protection device according to an embodiment of this utility model.

[0022] In the diagram, 10 is the spray gun body; 11 is the outer sleeve; and 12 is the nozzle component. 20. Anti-wear components; 21. First plate; 30. Flow guiding component; 31. Second plate; 40. Support assembly; 41. First support frame; 411. First connecting rod; 412. First abutment part; 42. Second support frame; 421. Second connecting rod; 422. Second abutment part; 50. Water inlet pipe; 51. Water inlet; 60. Return water pipe; 52. Return water outlet; 70. Desulfurization tower. Detailed Implementation

[0023] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0024] In the description of this utility model, it should be understood that when an element is referred to as "fixed to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to or indirectly connected to the other element. The terms "mounted," "connected," and "attached" should be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0025] In the description of this utility model, it should be understood that the terms "height," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used to indicate 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 element 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.

[0026] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0027] like Figures 1 to 4As shown, the present invention preferably provides a circulating fluidized bed spray gun protection device, which includes a spray gun body 10, an anti-wear component 20, and a flow guiding component 30. The spray gun body 10 is arranged on a desulfurization tower 70, with one end penetrating through the outer wall of the desulfurization tower 70 and inserted into the interior of the desulfurization tower 70, and the other end extending to the outside of the desulfurization tower 70. An outer ring sleeve 11 is provided on the outer periphery of the spray gun body 10, and the outer ring sleeve 11 extends along the length direction of the spray gun body 10. The anti-wear component 20 is disposed on the outer periphery of the outer ring sleeve 11, and the anti-wear component 20 includes a plurality of first plates 2 1. Multiple first plates 21 extend along the length of the spray gun body 10, and the multiple first plates 21 are connected to each other to form a protective area for placing the spray gun body 10; the flow guiding component 30 is disposed at the end of the spray gun body 10 facing the incoming flue gas and is connected to the anti-wear component 20. The flow guiding component 30 includes two inclined second plates 31 connected to each other. The cross-section of the two second plates 31 is V-shaped and the two second plates 31 form a buffer zone to disperse the flue gas in the circulating fluidized bed and prevent the flue gas from directly washing the spray gun body 10.

[0028] Based on the above technical features, this utility model embodiment, through the setting of the anti-wear component 20, forms a protective area specifically for placing the spray gun body 10 by multiple first plates 21 extending along the length direction of the spray gun body 10 and interconnected. This design encloses the spray gun body 10, effectively reducing the direct scouring and wear of the spray gun body 10 by solid particles carried in the flue gas in the circulating fluidized bed, greatly extending the service life of the spray gun body 10, and reducing the equipment cost and downtime maintenance cost caused by frequent replacement of the spray gun body 10. Through the setting of the flow guiding component 30, the two inclined and interconnected second plates 31 of the flow guiding component 30 form a buffer zone. When the flue gas in the circulating fluidized bed comes, the buffer zone can change the flow direction and velocity distribution of the flue gas, so that the flue gas is fully dispersed. This dispersion effect avoids the flue gas from directly scouring the spray gun body 10 at high speed, effectively reducing the damage of the flue gas to the spray gun body 10.

[0029] Furthermore, the outer sleeve 11, the first plate 21, and the second plate 31 are all made of stainless steel. The stainless steel material provides high strength and hardness. The outer sleeve 11 needs to provide stable support and protection for the spray gun body 10, the first plate 21 must withstand the scouring and friction of the flue gas particles, and the second plate 31 must guide and disperse the flue gas and withstand the corresponding aerodynamic forces. The high strength and hardness of stainless steel ensures that these components will not deform or be damaged under these conditions, guaranteeing the normal operation of the protective device.

[0030] As some embodiments of this utility model, such as Figures 1 to 3As shown, the circulating fluidized bed spray gun protection device also includes a support assembly 40. The support assembly 40 is used to ensure that the spray gun body 10 is installed on the desulfurization tower 70. The support assembly 40 includes two first support frames 41. The two first support frames 41 are respectively set at both ends of the anti-wear assembly 20 and connected to the desulfurization tower 70. The two first support frames 41 are located at both ends of the anti-wear assembly 20, providing support from different positions of the spray gun body 10 to form a stable support structure. This layout can effectively distribute the weight of the spray gun body 10 itself and various forces generated during operation, ensuring that the spray gun body 10 is firmly installed on the desulfurization tower 70 and will not shake, shift, or tilt due to uneven force, thus ensuring the accurate position and stable working state of the spray gun body 10 in the desulfurization tower 70.

[0031] As some embodiments of this utility model, such as Figures 1 to 3 As shown, each first support frame 41 includes a first connecting rod 411 and a first abutting part 412. The first connecting rod 411 is inclinedly disposed on the outer periphery of the anti-wear component 20. One end of the first connecting rod 411 is connected to the first plate 21, and the other end is connected to the first abutting part 412. The end of the first abutting part 412 facing away from the first connecting rod 411 is connected to the inner wall of the desulfurization tower 70. By inclining the first connecting rod 411, when the spray gun body 10 is subjected to flue gas impact force, its own weight, and spray reaction force, the inclined first connecting rod 411 can decompose and redistribute these forces. A portion of the force is transmitted along the first connecting rod 411 to the first abutting part 412, and then from the first abutting part 412 to the inner wall of the desulfurization tower 70. This avoids the concentration of force on a certain point or component, thereby effectively reducing the local stress on the spray gun body 10 and the anti-wear component 20, and reducing the risk of component damage due to excessive local stress. The inclined first connecting rod 411, the first abutment part 412, and the anti-wear component 20 form a stable triangular mechanical structure. This structure can resist forces and vibrations from different directions, making the entire support component 40 more stable.

[0032] As some embodiments of this utility model, such as Figures 1 to 3 As shown, the support assembly 40 also includes a second support frame 42, which is mounted on the flow guiding assembly 30 and connected to the desulfurization tower 70. With the second support frame 42 installed, the flow guiding assembly 30, subjected to the impact and flow pressure of high-speed flue gas for extended periods within the circulating fluidized bed desulfurization tower 70, is prone to swaying or displacement. The second support frame 42, directly mounted on the flow guiding assembly 30 and connected to the desulfurization tower 70, provides additional support points for the flow guiding assembly 30, enhancing its stability in complex airflow environments and ensuring that the flow guiding assembly 30 always remains in its designed position, accurately fulfilling its flow guiding function.

[0033] As some embodiments of this utility model, such as Figures 1 to 3 As shown, the second support frame 42 includes a second connecting rod 421 and a second abutting part 422. The second connecting rod 421 is inclinedly disposed on the outer wall of the second plate 31 and located at the connection of the two second plates 31. One end of the second abutting part 422 is connected to the end of the second connecting rod 421 away from the second plate 31, and the other end of the second abutting part 422 is connected to the inner wall of the desulfurization tower 70. With the second connecting rod 421 and the second abutment part 422, the second connecting rod 421 is inclinedly set on the outer wall of the connection between the two second plates 31. The second connecting rod 421 and the two second plates 31 together form an approximately triangular structure, which improves the overall structural stability of the flow guiding assembly 30. The second abutment part 422 connects the second connecting rod 421 to the inner wall of the desulfurization tower 70, forming a complete force transmission path. When the flow guiding assembly 30 is impacted by flue gas, the force will be transmitted to the second abutment part 422 through the second connecting rod 421, and then evenly distributed to the inner wall of the desulfurization tower 70 by the second abutment part 422. This force distribution method avoids damage to the flow guiding assembly 30 and the desulfurization tower 70 caused by excessive local stress, and extends the service life of the equipment.

[0034] As some embodiments of this utility model, such as Figures 1 to 3 As shown, both the first abutting part 412 and the second abutting part 422 are attached to the inner wall of the desulfurization tower 70. The first abutting part 412 and the second abutting part 422 are attached to the inner wall of the desulfurization tower 70 from different positions, which can evenly distribute the force borne by the equipment to a large area of ​​the desulfurization tower 70.

[0035] Furthermore, the outer diameters of the first abutting portion 412 and the second abutting portion 422 are both larger than the outer diameters of the first connecting rod 411 and the second connecting rod 421.

[0036] As some embodiments of this utility model, such as Figures 1 to 3 As shown, the first connecting rod 411, the second connecting rod 421, the first abutting part 412, and the second abutting part 422 are all made of stainless steel. Stainless steel has high strength and good toughness. The first connecting rod 411 and the second connecting rod 421 need to transmit the forces on the anti-wear component 20 and the flow guiding component 30. The first abutting part 412 and the second abutting part 422 need to withstand the impact of flue gas and the interaction force with the inner wall of the desulfurization tower 70. The high strength of stainless steel can ensure that they do not deform or break under these forces, while their good toughness allows them to absorb energy when subjected to impact or vibration, avoiding brittle fracture and improving the safety and reliability of the equipment.

[0037] As some embodiments of this utility model, such as Figure 1As shown, the circulating fluidized bed spray gun protection device also includes an inlet water pipe 50 and a return water pipe 60. One end of the return water pipe 60 is connected to the spray gun body 10, and the other end is connected to the inlet water pipe 50. The connection between the inlet water pipe 50 and the return water pipe 60 allows process water with stable pressure to be injected into the desulfurization tower 70, ensuring that the desulfurization reaction in the desulfurization tower 70 proceeds normally.

[0038] As some embodiments of this utility model, such as Figure 1 As shown, the inlet pipe 50 has an inlet 51 at the end opposite to the return pipe 60 for introducing process water, and the return pipe 60 has a return port 52 for regulating the pressure of the inlet pipe 50. The inlet 51, connected to process water, ensures a sufficient and stable water supply to the inlet pipe 50. During prolonged high-load operation of the circulating fluidized bed boiler, the furnace temperature is extremely high; a stable process water supply ensures the spray guns remain within a suitable operating temperature range. The return port 52 has a valve; by adjusting the valve opening on the return pipe 60, the pressure of the inlet pipe 50 can be precisely controlled. Closing the return valve slightly increases the pressure of the inlet pipe 50; opening the return valve more significantly decreases the pressure of the inlet pipe 50.

[0039] As some embodiments of this utility model, such as Figure 1 and Figure 3 As shown, the circulating fluidized bed spray gun protection device also includes a nozzle element 12. The nozzle element 12 is located at the end of the spray gun body 10 away from the return water pipe 60 and is located inside the desulfurization tower 70. The nozzle element 12 is used to spray process water into the interior of the desulfurization tower 70. The nozzle element 12 can atomize the process water into fine droplets. These fine droplets have a larger specific surface area and can more fully contact and mix with the flue gas inside the desulfurization tower 70.

[0040] In summary, the beneficial effects of the circulating fluidized bed spray gun protection device provided by this utility model compared with the prior art are as follows: the anti-wear component 20 forms a protective area specifically for the spray gun body 10 by means of multiple first plates 21 extending along the length direction of the spray gun body 10 and interconnected with each other. This design encloses the spray gun body 10, effectively reducing the direct scouring and wear of the spray gun body 10 by solid particles carried in the flue gas in the circulating fluidized bed, greatly extending the service life of the spray gun body 10, and reducing the equipment cost and downtime maintenance time caused by frequent replacement of the spray gun body 10. The two inclined and interconnected V-shaped second plates 31 of the flow guiding component 30 form a buffer zone. When flue gas from the circulating fluidized bed arrives, the buffer zone can change the flow direction and velocity distribution of the flue gas, allowing the flue gas to be fully dispersed. This dispersion effect prevents the flue gas from directly scouring the spray gun body 10 at high speed, effectively reducing the damage to the spray gun body 10 caused by the flue gas. This invention ensures that the spray gun body 10 will not experience problems such as poor atomization or excessively high flue gas temperature caused by wear throughout the entire operating cycle, thereby avoiding the risk of reduced desulfurization efficiency and desulfurization failure.

[0041] 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 substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A circulating fluidized bed spray gun protection device, installed on a desulfurization tower, characterized in that, include: Spray gun body, anti-wear components, and flow guiding components, The spray gun body is arranged on the desulfurization tower, with one end penetrating the outer wall of the desulfurization tower and inserted into the interior of the desulfurization tower, and the other end extending to the outside of the desulfurization tower. An outer ring sleeve is provided on the outer periphery of the spray gun body, and the outer ring sleeve extends along the length direction of the spray gun body. The anti-wear component is disposed on the outer periphery of the outer ring sleeve. The anti-wear component includes a plurality of first plates, each of which extends along the length direction of the spray gun body, and the plurality of first plates are interconnected to form a protective area for placing the spray gun body. The flow guiding component is located at the end of the spray gun body facing the incoming flue gas and is connected to the anti-wear component. The flow guiding component includes two inclined and interconnected second plates. The cross-section of the two second plates is V-shaped and the two second plates form a buffer zone to disperse the flue gas in the circulating fluidized bed and prevent the flue gas from directly washing over the spray gun body.

2. The circulating fluid bed lance protection device according to claim 1, characterized in that It also includes a support assembly for ensuring that the spray gun body is installed on the desulfurization tower. The support assembly includes a first support frame, and there are two first support frames. The two first support frames are respectively disposed at both ends of the anti-wear assembly and connected to the desulfurization tower.

3. The circulating fluid bed lance protection device according to claim 2, characterized in that Each of the first support frames includes a first connecting rod and a first abutting part. The first connecting rod is inclinedly disposed on the outer periphery of the anti-wear component. One end of the first connecting rod is connected to the first plate body, and the other end is connected to the first abutting part. The end of the first abutting part opposite to the first connecting rod is connected to the inner wall of the desulfurization tower.

4. The circulating fluid bed gun protection apparatus of claim 3 wherein, The support assembly also includes a second support frame, which is disposed on the flow guiding assembly and connected to the desulfurization tower.

5. A circulating fluid bed gun protection device according to claim 4, characterised in that The second support frame includes a second connecting rod and a second abutment. The second connecting rod is inclinedly disposed on the outer wall of the second plate and located at the connection of the two second plates. One end of the second abutment is connected to the end of the second connecting rod away from the second plate, and the other end of the second abutment is connected to the inner wall of the desulfurization tower.

6. A circulating fluid bed gun protection apparatus according to claim 5, characterised in that, Both the first abutting part and the second abutting part are attached to the inner wall of the desulfurization tower.

7. A circulating fluid bed gun protection device according to claim 6, characterised in that The first connecting rod, the second connecting rod, the first abutting part, and the second abutting part are all made of stainless steel.

8. The circulating fluid bed gun protection apparatus of claim 1 wherein, It also includes an inlet water pipe and a return water pipe, one end of which is connected to the spray gun body and the other end is connected to the inlet water pipe.

9. The circulating fluidized bed spray gun protection device according to claim 8, characterized in that, The inlet pipe has an inlet at one end opposite to the return pipe for introducing process water, and the return pipe has a return outlet for adjusting the pressure of the inlet pipe.

10. A circulating fluid bed gun protection apparatus according to claim 9, characterized in that It also includes a nozzle component, which is disposed at the end of the spray gun body away from the return water pipeline. The nozzle component is located inside the desulfurization tower and is used to spray process water into the interior of the desulfurization tower.

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