A reversing device for powder injection pipeline in desulfurization process

Abstract

The utility model provides a kind of powder spraying pipeline reversing device in desulfurization process, comprising: tee, it includes three pipe bodies and valve cavity, three pipe bodies meet in valve cavity, valve cavity is cylindrical cavity, the cylindrical cavity is provided with the pipe hole corresponding with three pipe bodies one-one and communication;Reversing valve core, it is set in valve cavity, reversing valve core includes shaft and shield, shield is fixedly connected with shaft, with shaft rotation, shield can cover any one pipe hole, to realize the switching of pipe body;Limiting assembly, the cavity wall of shaft extending out valve cavity is connected with limiting assembly, to realize the locking of shaft, and then the position of shield is locked.The utility model can avoid the emergence of airflow blind area in prior art, prevent local fine powder powder retention, accumulation, reversing valve core rotation can also shovel wall dust on the inner wall of valve cavity, with the advantages of simple structure, easy to install and use.

Description

Technical Field

[0001] This utility model relates to the field of desulfurization technology, and in particular to a powder injection pipeline reversing device in a desulfurization process. Background Technology

[0002] SDS (Sodium-Based Dry Sorting) desulfurization technology works by using ultrafine sodium bicarbonate powder, which decomposes into highly active sodium carbonate and carbon dioxide under the action of high-temperature flue gas. The highly active Na₂CO₃ (sodium bicarbonate) then reacts chemically with SO₂ and other acidic media in the high-temperature flue gas, resulting in absorption and purification. Sodium bicarbonate is used as the desulfurizing agent and is quantitatively supplied to the desulfurization flue gas spray nozzles through a desulfurizing agent supply system. The flue gas and desulfurizing agent are thoroughly mixed in the subsequent flue gas duct or desulfurization tower, rapidly undergoing a chemical reaction to remove SO₂ and Cl₂. - Acidic substances, etc. The dust-laden flue gas after desulfurization enters the bag filter, where the dust is captured. The purified gas is then sent to the chimney by an induced draft fan and discharged in compliance with emission standards.

[0003] Currently, desulfurizing agent supply systems typically consist of a desulfurizing agent storage silo, a grinding system, and a desulfurizing agent injection and feeding system. Sodium bicarbonate powder is conveyed from the hopper to the grinding mill via a screw weighing feeder, producing ultrafine sodium bicarbonate powder with a particle size of approximately 20μm. The ground ultrafine sodium bicarbonate powder is then transported to the injection point by a blower. Considering potential blockages and maintenance issues during the grinding system's operation, the grinding system is typically configured as either one-in-one-standby or two-in-one-standby, depending on the specific unit. In the two-in-one-standby configuration, a T-junction is usually used to connect the various pipelines, and pneumatic valves are installed on the pipelines. Switching between the primary and standby systems is achieved by controlling these pneumatic valves. During normal operation of the primary system, the standby system is inactive. However, if the standby pipeline is shut down for an extended period, a blind spot exists in the bypass switching T-junction pipeline. (See reference...) Figure 1 When equipment A and equipment B are working, the material flow direction in the pipe is as shown by the arrow in the figure. At this time, pneumatic valves a and b, and manual valve e are open, while pneumatic valve c and manual valve d are closed. Figure 1 As can be seen, the pipe section from pneumatic valve c to the tee is a blind zone, and the pipe section from manual valve d to pneumatic valve b is a blind zone. No airflow passes through these two blind zones. If equipment C is used as a backup and is not used for a long time, it is easy for fine powder to accumulate and stagnate in these blind zones. Moreover, since sodium bicarbonate is hygroscopic, it is very easy for some powder to become damp and clump together, which can lead to pipe blockage and even make it difficult to open pneumatic valve c. Utility Model Content

[0004] The purpose of this utility model is to provide a reversing device for powder injection pipeline in desulfurization process, which can avoid the occurrence of airflow blind zone in the prior art, prevent local fine powder retention and accumulation, and remove wall dust on the inner wall of the valve cavity while the reversing valve core rotates. It has the advantages of simple structure and convenient installation and use.

[0005] To achieve the above objectives, this utility model provides a powder injection pipeline reversing device in a desulfurization process, comprising:

[0006] The tee includes three pipes and a valve cavity. The three pipes converge in the valve cavity, which is a cylindrical cavity. The cylindrical cavity has pipe holes that correspond one-to-one with and communicate with the three pipes.

[0007] A reversing valve core is disposed in the valve cavity. The reversing valve core includes a rotating shaft and a blocking member. The blocking member is fixedly connected to the rotating shaft. As the rotating shaft rotates, the blocking member can cover any one of the pipe holes, thereby realizing the switching of the pipe body.

[0008] A limiting component is provided, wherein the rotating shaft extends out of the cavity wall of the valve chamber and connects to the limiting component, thereby locking the rotating shaft and thus locking the position of the blocking component.

[0009] Optionally, the tee includes a tee body and two blind plates. The tee body includes three pipes and a cylindrical portion. The pipe hole is disposed on the cylindrical portion. Each of the two axial end faces of the cylindrical portion is covered by a blind plate. The two blind plates and the cylindrical portion form the valve cavity.

[0010] Optionally, the limiting assembly includes a rotating arm and at least two limiting members. The rotating shaft extends out of the cavity wall of the valve chamber and is fixedly connected to one end of the rotating arm. The rotating arm can rotate around the rotating shaft as the rotation center, thereby driving the rotating shaft to rotate. The limiting members are located on the outer wall of the valve chamber. The other end of the rotating arm can be fixed to any one of the limiting members to lock the position of the rotating arm, thereby realizing the change and locking of the position of the blocking member.

[0011] Optionally, the limiting component includes a fastener, and the other end of the rotating arm is fixed to any one of the limiting members by the fastener.

[0012] Optionally, the fastener includes a bolt, the rotating arm has a corresponding through hole, the limiting member has a threaded hole for engaging with the bolt, and the bolt passes through the rotating arm and is threadedly connected to the limiting member.

[0013] Optionally, the number of limiting components is two, and both ends of the rotating shaft extend out of the cavity wall of the valve chamber and are each connected to one of the limiting components.

[0014] Optionally, the central axes of the three tubes are located in the same plane.

[0015] Optionally, the shielding component includes a connecting part and a shielding part. The shielding part is fixedly connected to the rotating shaft through the connecting part. The side of the shielding part facing away from the rotating shaft is in contact with the cylindrical surface of the cylindrical cavity. The area of ​​the side of the shielding part facing away from the rotating shaft is larger than the area of ​​any one of the pipe holes.

[0016] Optionally, the powder spraying pipeline reversing device includes three flanges, one end of the three pipes converges in the valve cavity, and the other end of each of the three pipes is connected to one of the flanges.

[0017] Optionally, the powder spraying pipeline reversing device includes an annular sealing gasket sleeved on the rotating shaft, and the limiting component presses the annular sealing gasket against the outer wall of the valve chamber.

[0018] As configured above, this utility model provides a powder injection pipeline reversing device in a desulfurization process, replacing the existing "three-way valve + pneumatic valve" switching combination. This integrated approach avoids the airflow blind spots present in existing technologies, prevents localized fine powder retention and accumulation, and significantly reduces the frequency of pipeline blockage. During reversal, the limiting component rotates, causing the rotating shaft to rotate. This rotates the blocking component of the reversing valve core to a predetermined position (covering one of the pipe holes), and then the limiting component locks the position of the blocking component, thus achieving the switching of material flow direction. This powder injection pipeline reversing device has a simple structure, is easy to install and use, and is suitable for switching materials between different pipelines. It can flexibly adjust the material flow direction according to different process requirements. While the reversing valve core rotates, it also removes dust adhering to the inner wall of the valve cavity, helping to maintain the cleanliness of the valve cavity wall and preventing dust accumulation and caking. Furthermore, the powder spraying pipeline reversing device of this utility model is connected to the pipeline via a flange, which makes it easy to remove the powder spraying pipeline reversing device from the pipeline via the flange, allowing for timely replacement of spare parts and ensuring that the pipeline system can be quickly restored to use. Attached Figure Description

[0019] Those skilled in the art will understand that the accompanying drawings are provided to better understand the present invention and do not constitute any limitation on the scope of the present invention. Wherein:

[0020] Figure 1 This is a schematic diagram of a desulfurization process pipeline system in the prior art;

[0021] Figure 2 This is an isometric view of a powder injection pipeline reversing device in a desulfurization process according to an embodiment of the present invention.

[0022] Figure 3This is an exploded view of a powder injection pipeline reversing device in a desulfurization process according to an embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of a powder injection pipeline reversing device in a desulfurization process according to an embodiment of the present invention.

[0024] Figure 5 for Figure 4 BB view;

[0025] Figure 6 This is a schematic diagram from another angle of the powder injection pipeline reversing device in a desulfurization process according to an embodiment of the present invention.

[0026] Figure 7 for Figure 6 AA view.

[0027] The reference numerals in the attached figures are as follows:

[0028] 1-Tee; 11-Pipe body; 12-Cylindrical part; 121-Pipe hole; 13-Valve cavity; 14-Blind flange; 2-Reversing valve core; 21-Rotating shaft; 22-Shielding part; 221-Connecting part; 222-Shielding part; 3-Limiting assembly; 31-Rotating arm; 32-Limiting part; 33-Fastener; 34-Nut; 4-Flange; 5-Annular sealing gasket. Detailed Implementation

[0029] In this document, unless otherwise stated, the terms “upper,” “lower,” “left,” “right,” “inner,” “outer,” “front,” “back,” “top,” “bottom,” etc., are used to indicate orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a characteristic orientation and operation, and therefore should not be construed as a limitation of the present invention.

[0030] The specific embodiments of this utility model will now be described in more detail with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0031] The preferred embodiments of this utility model are given below with reference to the accompanying drawings and described in detail.

[0032] Please refer to Figures 2 to 7 This utility model embodiment provides a powder injection pipeline reversing device in a desulfurization process, including a three-way valve 1, a reversing valve core 2, and a limiting component 3.

[0033] The tee 1 includes three pipe bodies 11 and a valve cavity 13. The three pipe bodies 11 converge at the valve cavity 13, which is a cylindrical cavity. The cylindrical surface of the valve cavity has pipe holes 121 that correspond one-to-one with and communicate with the three pipe bodies 11. Specifically, the tee 1 includes a tee body and two blind plates 14. The tee body includes three pipe bodies 11 and a cylindrical portion 12. The pipe holes 121 are provided on the cylindrical portion 12. Each of the two axial end faces of the cylindrical portion 12 is covered by a blind plate 14. The two blind plates 14 and the cylindrical portion 12 form the valve cavity 13. It can be understood that the cylindrical space surrounded by the two blind plates 14 and the cylindrical portion 12 is the valve cavity 13. Preferably, the central axes of the three pipe bodies 11 are located in the same plane, and the axis of the valve cavity 13 (i.e., the axis of the cylindrical cavity) is perpendicular to the axes of the three pipe bodies 11.

[0034] The reversing valve core 2 is disposed in the valve cavity 13. The reversing valve core 2 includes a rotating shaft 21 and a blocking member 22. The blocking member 22 is fixedly connected to the rotating shaft 21. As the rotating shaft 21 rotates, the blocking member 22 can cover any one of the pipe holes 121, allowing the material to flow between the other two pipe holes 121, thereby realizing the switching of the pipe body 11. In the two-in-one-out working condition, the material can be switched between the commonly used channel and the standby channel. The blocking member 22 can be fixedly connected to the rotating shaft 21, for example, by welding.

[0035] The rotating shaft 21 extends out of the cavity wall of the valve chamber 13 and connects to the limiting component 3, that is, the rotating shaft 21 extends out of the blind plate 14 and connects to the limiting component 3, thereby locking the rotating shaft 21 and thus locking the position of the blocking member 22. Further, the limiting component 3 includes a rotating arm 31 and at least two limiting members 32. The rotating shaft 21 extends out of the cavity wall of the valve chamber 13 (i.e., extends out of the blind plate 14) and is fixedly connected to one end of the rotating arm 31. The rotating arm 31 can rotate around the rotating shaft 21 as the rotation center, thereby driving the rotating shaft 21 to rotate. The limiting member 32 is located on the outer wall of the valve chamber 13, that is, on the blind plate 14. The other end of the rotating arm 31 can be fixed to any one of the limiting members 32 to lock the position of the rotating arm 31, thereby changing and locking the position of the blocking member 22. It is understandable that each limiting member 32 corresponds to a pipe hole 121. When the rotating arm 31 is fixed on the limiting member 32, the blocking member 22 just covers the corresponding pipe hole 121, so that the material flows between the other two pipe holes 121.

[0036] Preferably, the powder spraying pipeline reversing device includes an annular sealing gasket 5 sleeved on the rotating shaft 21. The limiting component 3 presses the annular sealing gasket 5 against the outer wall of the valve cavity 13, that is, the rotating arm 31 presses the annular sealing gasket 5 against the blind plate 14 to prevent material leakage from the valve cavity 13. The connection between the rotating shaft 21 and the rotating arm 31 can be as follows: the rotating shaft 21 passes through the rotating arm 31, the rotating shaft 21 is circumferentially fixed to the rotating arm 31 by a key, and at the same time, the nut 34 is connected to the external thread at the end of the rotating shaft 21, so that the nut 34 presses the rotating arm 31 against the annular sealing gasket 5, and the annular sealing gasket 5 then presses against the blind plate 14.

[0037] For example, the shielding member 22 includes a connecting portion 221 and a shielding portion 222. The shielding portion 222 is fixedly connected to the rotating shaft 21 via the connecting portion 221. The side of the shielding portion 222 facing away from the rotating shaft 21 is in contact with the cylindrical surface of the cylindrical cavity. The area of ​​the side of the shielding portion 222 facing away from the rotating shaft 21 is larger than the area of ​​any one of the pipe holes 121, so as to completely cover one pipe hole 121. The shape of the connecting portion 221 is not limited. For example, the connecting portion 221 can be a fan-shaped plate, with the central end of the fan-shaped plate fixedly connected to the rotating shaft 21 and the arc edge of the fan-shaped plate fixedly connected to the shielding portion 222. The number of connecting portions 221 is at least one. When there are two or more connecting portions 221, the connecting portions 221 are arranged at intervals along the rotating shaft 21.

[0038] Furthermore, the limiting component 3 includes a fastener 33, and the other end of the rotating arm 31 is fixed to any one of the limiting members 32 by the fastener 33. For example, the fastener 33 includes a bolt, the rotating arm 31 is provided with a corresponding through hole, and the limiting member 32 is provided with a threaded hole for engaging with the bolt. The bolt passes through the rotating arm 31 and is threadedly connected to the limiting member 32. Since the side of the shielding part 222 facing away from the rotating shaft 21 is in contact with the cylindrical surface of the cylindrical cavity, during maintenance, after the grinding blower (the grinding blower used to blow materials) is turned off, the fastener 33 is loosened, and the rotating arm 31 is manually rotated several times to drive the reversing valve core 2 to rotate. During the movement, the shielding part 222 of the reversing valve core 2 removes the wall dust on the cylindrical surface of the cylindrical cavity, which helps to keep the cavity wall of the valve cavity 13 clean and prevents dust accumulation and hardening on the cavity wall of the valve cavity 13. Then, the rotating arm 31 is fixed to the corresponding limiting member 32 for pipeline switching of the backup system.

[0039] Preferably, there are two limiting components 3. Both ends of the rotating shaft 21 extend out of the cavity wall of the valve cavity 13 and are each connected to a limiting component 3. That is, both ends of the rotating shaft 21 pass through the blind plates 14 at both ends of the cylindrical cavity and are each fixedly connected to a rotating arm 31.

[0040] The powder spraying pipeline reversing device includes three flanges 4, one end of three pipe bodies 11 converges in the valve chamber 13, and the other end of each of the three pipe bodies 11 is connected to a flange 4 so as to connect to the pipeline system through the flanges 4.

[0041] As configured above, this utility model provides a powder injection pipeline reversing device in a desulfurization process, replacing the existing "three-way valve + pneumatic valve" switching combination. This integrated approach avoids the airflow blind spots present in the prior art, prevents localized fine powder retention and accumulation, and significantly reduces the frequency of pipeline blockage. During reversal, the limiting component 3 rotates, thereby driving the rotating shaft 21 to rotate. This causes the blocking component 22 of the reversing valve core 2 to rotate to a predetermined position (covering one of the pipe holes 121). The limiting component 3 then locks the position of the blocking component 22, thus achieving the switching of material flow direction. This powder injection pipeline reversing device has a simple structure, is easy to install and use, and is suitable for switching materials between different pipelines. It can flexibly adjust the material flow direction according to different process requirements. While the reversing valve core 2 rotates, it also removes wall-mounted dust from the valve cavity, helping to maintain the cleanliness of the valve cavity 13's wall and preventing dust accumulation and caking. Furthermore, the powder spraying pipeline reversing device of this utility model is connected to the pipeline via flange 4, which makes it easy to remove the powder spraying pipeline reversing device from the pipeline via flange 4, allowing for timely replacement of spare parts and ensuring that the pipeline system can be quickly restored to use.

[0042] It should be noted that references to "an embodiment," "an embodiment," "a specific embodiment," "some embodiments," etc., in the specification only indicate that the described embodiment may include a specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Additionally, when a specific feature, structure, or characteristic is described in conjunction with an embodiment, whether explicitly described or not, implementing such a feature, structure, or characteristic in conjunction with other embodiments is within the knowledge of those skilled in the art.

[0043] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.

[0044] It should also be noted that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the present invention without departing from the scope of the present invention, or equivalent embodiments can be modified based on the disclosed technical content. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention shall still fall within the protection scope of the present invention.

[0045] It should also be understood that, unless otherwise specified or indicated, the terms “first,” “second,” “third,” etc., in the specification are used only to distinguish the various components, elements, and steps in the specification, and not to indicate the logical or sequential relationships between the various components, elements, and steps.

[0046] Furthermore, it should be recognized that the terminology described herein is used only to describe particular embodiments and not to limit the scope of the invention. It must be noted that the singular forms “a” and “an” used herein and in the appended claims include plural bases unless the context clearly indicates otherwise. For example, a reference to “a step” or “an apparatus” means a reference to one or more steps or apparatuses, and may include secondary steps and secondary apparatuses. All conjunctions used should be understood in the broadest sense. Also, the word “or” should be understood to have the definition of logical “or” rather than logical “exclusive OR”, unless the context clearly indicates otherwise. Furthermore, implementation of the methods and / or devices in embodiments of the invention may include performing selected tasks manually, automatically, or in combination.

Claims

1. A reversing device for a powder injection pipeline in a desulfurization process, characterized in that, include: The tee includes three pipes and a valve cavity. The three pipes converge in the valve cavity, which is a cylindrical cavity. The cylindrical cavity has pipe holes that correspond one-to-one with and communicate with the three pipes. A reversing valve core is disposed in the valve cavity. The reversing valve core includes a rotating shaft and a blocking member. The blocking member is fixedly connected to the rotating shaft. As the rotating shaft rotates, the blocking member can cover any one of the pipe holes, thereby realizing the switching of the pipe body. A limiting component is provided, wherein the rotating shaft extends out of the cavity wall of the valve chamber and connects to the limiting component, thereby locking the rotating shaft and thus locking the position of the blocking component.

2. The powder injection pipeline reversing device in the desulfurization process as described in claim 1, characterized in that, The tee includes a tee body and two blind plates. The tee body includes three pipes and a cylindrical part. The pipe hole is provided on the cylindrical part. Each of the two axial end faces of the cylindrical part is covered by a blind plate. The two blind plates and the cylindrical part form the valve cavity.

3. The powder injection pipeline reversing device in the desulfurization process as described in claim 1, characterized in that, The limiting assembly includes a rotating arm and at least two limiting members. The rotating shaft extends out of the cavity wall of the valve chamber and is fixedly connected to one end of the rotating arm. The rotating arm can rotate around the rotating shaft as the rotation center, thereby driving the rotating shaft to rotate. The limiting members are located on the outer wall of the valve chamber. The other end of the rotating arm can be fixed to any one of the limiting members to lock the position of the rotating arm, thereby realizing the change and locking of the position of the blocking member.

4. The powder injection pipeline reversing device in the desulfurization process as described in claim 3, characterized in that, The limiting component includes a fastener, and the other end of the rotating arm is fixed to any one of the limiting components by the fastener.

5. The powder injection pipeline reversing device in the desulfurization process as described in claim 4, characterized in that, The fastener includes a bolt, the rotating arm has a corresponding through hole, the limiting member has a threaded hole for engaging with the bolt, and the bolt passes through the rotating arm and is threadedly connected to the limiting member.

6. The powder injection pipeline reversing device in the desulfurization process as described in claim 1, characterized in that, The number of limiting components is two, and both ends of the rotating shaft extend out of the cavity wall of the valve chamber and are each connected to one of the limiting components.

7. The powder injection pipeline reversing device in the desulfurization process as described in claim 1, characterized in that, The central axes of the three tubes are located in the same plane.

8. The powder injection pipeline reversing device in the desulfurization process as described in claim 1, characterized in that, The shielding component includes a connecting part and a shielding part. The shielding part is fixedly connected to the rotating shaft through the connecting part. The side of the shielding part facing away from the rotating shaft is in contact with the cylindrical surface of the cylindrical cavity. The area of ​​the side of the shielding part facing away from the rotating shaft is larger than the area of ​​any one of the pipe holes.

9. The powder injection pipeline reversing device in the desulfurization process as described in claim 1, characterized in that, The powder spraying pipeline reversing device includes three flanges, one end of the three pipes converges in the valve cavity, and the other end of each of the three pipes is connected to one of the flanges.

10. The powder injection pipeline reversing device in the desulfurization process as described in claim 1, characterized in that, The powder spraying pipeline reversing device includes an annular sealing gasket sleeved on the rotating shaft, and the limiting component presses the annular sealing gasket against the outer wall of the valve cavity.

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