A safety alarm device applied to a wet desulfurization device

Abstract

The utility model discloses a kind of safety alarm equipment applied to wet desulphurization device, it is related to wet desulphurization safety alarm technical field, including connecting pipe, its both ends are provided with connecting flange, for with the flue gas pipeline of wet desulphurization device interconnect, the lateral wall of connecting pipe is provided with shunt pipe, shunt pipe and connecting pipe intercommunication;Pressure relief component, it is set inside shunt pipe, including several sleeves.The utility model when the pressure increase of flue gas pipeline appears due to blockage, the air pressure in pipeline enters to the inside of shunt pipe and will valve plate open, at this time, the pressure of increasing will enter to the inside of collection cylinder, simultaneously extrude isolation component, make isolation component push the pure gas in collection cylinder and enter alarm component to generate alarm, realize the purpose of pressure relief alarm, prevent in processing process, the problem that the pressure in pipeline is too large and leads to flue gas pipeline damage.

Description

Technical Field

[0001] This utility model relates to the field of safety alarm technology for wet desulfurization, and in particular to a safety alarm device applied to wet desulfurization equipment. Background Technology

[0002] In wet desulfurization processes, flue gas needs to be transported to treatment devices such as absorption towers through a complex pipeline system. In actual operation, the flow cross-section of the flue gas pipeline may be reduced due to scaling, ash accumulation, blockage by foreign objects, or downstream equipment failure, resulting in an abnormal increase in internal pressure. If this pressure accumulation is not released in time, the sustained high pressure will exceed the design pressure limit of components such as pipelines, flanges, and supports, which may lead to deformation, weld cracking, or even physical explosion. While existing safety alarm devices can trigger an alarm when abnormal high pressure is generated in the flue gas duct, the process of handling or shutting down the equipment requires a certain amount of time. During this time, the continuous high pressure can easily cause irreversible damage to the flue gas duct, which may lead to the expansion of the fault or delays in handling. Utility Model Content

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0004] In view of the problems existing in the above and / or existing safety alarm devices applied to wet desulfurization units, this utility model is proposed.

[0005] Therefore, the problem to be solved by this utility model is how to address the issue that although existing safety alarm devices can trigger an alarm when abnormal high pressure is generated in the flue gas pipeline, the continuous high pressure can easily cause irreversible damage to the flue gas pipeline during the handling or shutdown process, which may lead to the expansion of the fault or delay in handling.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a safety alarm device applied to a wet desulfurization unit, comprising: a connecting pipe with connecting flanges at both ends for connecting to the flue gas pipeline of the wet desulfurization unit; a diversion pipe on the side wall of the connecting pipe, the diversion pipe being interconnected with the connecting pipe; a pressure relief assembly disposed inside the diversion pipe, comprising several sleeves, the sleeves being fixedly disposed inside the diversion pipe, a piston rod being slidably disposed inside the sleeves, and a valve plate being fixedly connected to one end of the piston rod extending out of the sleeve; a collecting cylinder fixedly connected to the end of the diversion pipe away from the connecting pipe, an isolation assembly disposed inside the collecting cylinder; and an alarm assembly fixedly connected to the collecting cylinder and located at the end of the collecting cylinder away from the diversion pipe.

[0007] As a preferred embodiment of the safety alarm device applied to the wet desulfurization unit described in this utility model, the outer surface of the connecting pipe is corrugated, and the corrugated pipe section is composed of continuous and uniform annular peaks and troughs, so that its outer surface presents a regular corrugated shape.

[0008] As a preferred embodiment of the safety alarm device applied to a wet desulfurization unit according to the present invention, wherein: connecting lugs are fixedly provided on the outer periphery of the connecting flange, and the connecting lugs at both ends are connected to an adjusting screw.

[0009] As a preferred embodiment of the safety alarm device applied to the wet desulfurization unit of the present invention, the valve plate is cone-shaped, and a positioning groove that mates with the sleeve is provided on the outer periphery of the cone. A rubber sealing sheet is provided on the side of the valve plate facing the diversion pipe.

[0010] As a preferred embodiment of the safety alarm device applied to the wet desulfurization unit of the present invention, wherein: a gas guide ring is sleeved on the outer periphery of the diversion pipe, a guide pipe connected to the sleeve is provided on the inner side of the gas guide ring for connecting the gas guide ring and the sleeve, and an air injection hole is provided on the side wall of the gas guide ring.

[0011] As a preferred embodiment of the safety alarm device applied to the wet desulfurization unit of this utility model, the isolation component includes a sliding plate slidably disposed inside the collection cylinder for dividing the collection cylinder into two independent cavities, and a sealing ring is provided on the outer periphery of the sliding plate.

[0012] As a preferred embodiment of the safety alarm device applied to the wet desulfurization unit of this utility model, the sliding plate is provided with a plurality of optical axes, and the two ends of the optical axes are respectively fixedly connected to the inner end wall of the collecting cylinder.

[0013] As a preferred embodiment of the safety alarm device applied to the wet desulfurization unit of this utility model, wherein: a clamping tube is provided at the position corresponding to the valve plate on the pipe wall of the diversion pipe, a sliding groove is opened at the position corresponding to the clamping tube on the diversion pipe, a locking block is slidably arranged inside the sliding groove, and a spring assembly is provided inside the clamping tube.

[0014] As a preferred embodiment of the safety alarm device applied to the wet desulfurization unit of this utility model, the spring assembly includes a connecting spring, which is disposed inside the pressure tube. One end of the connecting spring is provided with a top block, which is fixedly connected to the top of the locking block. The other end of the connecting spring is rotatably provided with a threaded sleeve, which is threadedly connected to the inner wall of the pressure tube.

[0015] As a preferred embodiment of the safety alarm device applied to the wet desulfurization unit of this utility model, the alarm component includes an exhaust pipe fixedly connected to the collection cylinder, and an airflow speaker is installed inside the exhaust pipe via a threaded connection.

[0016] The beneficial effects of this utility model are as follows: when the flue gas pipeline experiences increased pressure due to blockage, the gas pressure inside the pipeline enters the interior of the diverter and pushes open the valve plate. At this time, the increased pressure enters the interior of the collection cylinder and simultaneously squeezes the isolation component, causing the isolation component to push the pure gas inside the collection cylinder into the alarm component to generate an alarm, thus achieving the purpose of pressure relief alarm and preventing the flue gas pipeline from being damaged due to excessive pressure inside the pipeline during the handling process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an overall structural diagram of a safety alarm device used in a wet desulfurization unit.

[0019] Figure 2 This is an exploded view of the structure of a safety alarm device used in a wet desulfurization unit.

[0020] Figure 3 This is a schematic diagram of the pressure relief component of a safety alarm device used in a wet desulfurization unit.

[0021] Figure 4 This is a schematic diagram of the structure of the diversion pipe used in the safety alarm equipment of a wet desulfurization unit.

[0022] Figure 5Safety alarm equipment for use in wet desulfurization units Figure 4 An enlarged view of the structure at point A.

[0023] Figure 6 This is a schematic diagram of the isolation component of a safety alarm device used in a wet desulfurization unit.

[0024] Figure 7 This is a schematic diagram of the planar structure of the diversion pipe and pressure relief assembly used in the safety alarm equipment of a wet desulfurization unit.

[0025] In the diagram: 1. Connecting pipe; 2. Connecting flange; 21. Connecting lug; 22. Adjusting screw; 3. Diverter pipe; 31. Air guide ring; 32. Flow guide pipe; 33. Air injection hole; 34. Pressurizing pipe; 35. Sliding groove; 36. Locking block; 37. Spring assembly; 371. Connecting spring; 372. Top block; 373. Screw sleeve; 4. Pressure relief assembly; 41. Sleeve; 42. Piston rod; 43. Valve plate; 44. Positioning groove; 45. Rubber sealing sheet; 5. Collection cylinder; 6. Isolation assembly; 61. Sliding plate; 62. Sealing ring; 63. Optical axis; 7. Alarm assembly; 71. Exhaust pipe; 72. Airflow speaker. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0029] Example 1, referring to Figures 1 to 7This is the first embodiment of the present invention. This embodiment provides a safety alarm device for a wet desulfurization unit. The safety alarm device for a wet desulfurization unit includes a connecting pipe 1, which is used in conjunction with a connecting flange 2 to connect to the flue gas pipeline of the wet desulfurization unit. When the flue gas pipeline experiences increased pressure due to blockage, the gas pressure inside the pipeline enters the interior of the diversion pipe 3 and pushes open the valve plate 43. At this time, the increased pressure enters the interior of the collection cylinder 5 and simultaneously squeezes the isolation component 6, causing the isolation component 6 to push the pure gas inside the collection cylinder 5 into the alarm component 7 to generate an alarm, thereby achieving the purpose of pressure relief alarm and preventing the flue gas pipeline from being damaged due to excessive pressure inside the pipeline during the processing.

[0030] Specifically, the connecting pipe 1 has connecting flanges 2 at both ends for connecting to the flue gas pipeline of the wet desulfurization unit. The connecting flanges 2 are tightly connected to the flue gas pipeline flange by high-strength bolts to form a rigid sealing connection, ensuring that no leakage will occur under high pressure conditions. The side wall of the connecting pipe 1 is provided with a diversion pipe 3, which is connected to the connecting pipe 1, so that the flue gas can be smoothly diverted from the main pipeline to the pressure relief channel.

[0031] Specifically, the pressure relief component 4 is located inside the diversion pipe 3 and includes several sleeves 41. The sleeves 41 are fixedly installed inside the diversion pipe 3 by welding or threaded connection. A piston rod 42 is slidably installed inside the sleeve 41. The piston rod 42 and the inner wall of the sleeve 41 are precisely fitted to ensure smooth sliding under air pressure. One end of the piston rod 42 extending out of the sleeve 41 is fixedly connected to a valve plate 43. When the pressure in the pipeline exceeds the set threshold, the air pressure pushes the piston rod 42 to move axially, causing the valve plate 43 to disengage from the sealing surface and form a pressure relief channel.

[0032] Specifically, the collecting cylinder 5 is fixedly connected to the end of the diversion pipe 3 away from the connecting pipe 1 via a flange. The collecting cylinder 5 is equipped with an isolation component 6, which is used to divide the cylinder into two independent chambers. The front chamber receives high-pressure flue gas from the diversion pipe 3, and the rear chamber is pre-filled with clean air. When the high-pressure flue gas is depressurized inside the flue gas duct through the diversion pipe 3, the high-pressure flue gas pushes the isolation component 6, compresses the clean air, and causes this part of the clean air to enter the alarm component 7 fixedly connected to the collecting cylinder 5.

[0033] Specifically, the alarm component 7 is connected and fixed to the collection cylinder 5 by a threaded assembly, and is located at the end of the collection cylinder 5 away from the diversion pipe 3. When the isolation component 6 is pushed, the clean gas in the rear chamber is discharged under pressure, which drives the alarm component 7 to make a sound, thus achieving the purpose of alarm.

[0034] Example 2, refer to Figures 2-7 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0035] Specifically, a portion of the outer surface of the connecting pipe 1 is corrugated. The corrugated pipe section consists of continuous and uniform annular peaks and troughs, giving its outer surface a regular corrugated shape. The corrugated structure has good flexibility and expansion and contraction compensation capabilities, which can effectively absorb the displacement stress caused by thermal expansion and contraction or vibration of the pipeline system and prevent fatigue damage at the connection points.

[0036] Specifically, each of the two connecting flanges 2 has a corresponding fixed connecting lug 21 on its outer periphery. The connecting lugs 21 at both ends are connected to an adjusting screw 22. The adjusting screw 22 has a positive and negative thread design at both ends. By rotating the screw, the parallelism and spacing of the two flange faces can be precisely adjusted to ensure accurate docking with the pipe flange, thereby improving installation accuracy and sealing reliability.

[0037] Specifically, the valve plate 43 is tapered, and a positioning groove 44 that mates with the sleeve 41 is provided on the outer periphery of the tapered shape. The tapered design allows the valve plate 43 to form a gradually expanding flow channel when it is open, effectively reducing the flow resistance coefficient. A rubber sealing sheet 45 is provided on the side of the valve plate 43 facing the diversion pipe 3. The sealing sheet is made of high-temperature resistant fluororubber material and is fixed to the surface of the valve plate 43 by screws. In the closed state, it forms a surface contact seal with the inner wall of the diversion pipe 3, improving the sealing performance and preventing leakage.

[0038] Specifically, a guide ring 31 is sleeved on the outer periphery of the diverter pipe 3. The guide ring 31 is fixedly connected to the diverter pipe 3 by several snap fasteners. A guide pipe 32 connected to the sleeve 41 is provided on the inner side of the guide ring 31. The guide pipe 32 is made of stainless steel and is connected to the sleeve 41 by a quick-connect fitting to form a stable pneumatic control circuit. An air injection hole 33 is provided on the side wall of the guide ring 31.

[0039] By simultaneously extracting air from the inside of each sleeve 41 through the air injection hole 33, the air guide ring 31, and the guide pipe 32, a negative pressure is formed inside the sleeve 41 to attract the piston rod 42. Through the attraction of the piston rod 42, the valve plate 43 is pressed tightly at the opening of the separator pipe, so that the flue gas pipeline can work normally under normal conditions and prevent the flue gas inside the flue gas pipeline from entering the inside of the collection cylinder 5.

[0040] When an abnormality occurs in the flue gas duct and causes a blockage, resulting in increased gas pressure, the thrust of the flue gas duct on the valve plate 43 is greater than the suction force of the negative pressure inside the sleeve 41. At this time, the valve plate 43 is pushed open, and the high-pressure flue gas inside the flue gas duct can be quickly discharged into the collection cylinder 5, achieving the purpose of reducing the pressure of the flue gas duct. In addition, the high-pressure flue gas pushes the isolation component 6 to cooperate with the alarm component 7 to generate sound, achieving the effect of pressure relief alarm.

[0041] Specifically, the isolation component 6 includes a sliding plate 61 slidably disposed inside the collection cylinder 5, which is used to divide the collection cylinder 5 into two independent cavities. The outer periphery of the sliding plate 61 is provided with a sealing ring 62, which has a multi-layer structure. While maintaining the flexibility of sliding, it ensures absolute isolation between the cavities. This is a technical means well known to those skilled in the art, and will not be described in detail here.

[0042] Specifically, the sliding plate 61 has several optical axes 63 slidably arranged inside. The two ends of the optical axes 63 are respectively fixed to the inner end wall of the collecting cylinder 5 by thread. The optical axes 63 provide precise guidance for the sliding plate 61 to prevent it from deflecting or getting stuck during movement.

[0043] Specifically, a clamping tube 34 is provided on the pipe wall of the diverter 3 at a position corresponding to the valve plate 43. A sliding groove 35 is provided on the diverter 3 at a position corresponding to the clamping tube 34. A locking block 36 is slidably provided inside the sliding groove 35. The locking block 36 can move radially within the groove. A spring assembly 37 is provided inside the clamping tube 34. When the valve plate 43 is in the closed state, the spring force drives the locking block 36 to contact the surface of the valve plate 43. When the high-pressure flue gas pushes the valve plate 43 to move away from the diverter 3, the locking block 36 is pushed by the spring and locked between the valve plate 43 and the diverter 3, realizing the mechanical locking of the valve plate 43 and avoiding the problem of discontinuous alarm caused by the valve plate 43 retracting after the pressure in the flue gas pipeline decreases.

[0044] Specifically, the spring assembly 37 includes a connecting spring 371, which is disposed inside the pressure tube 34. One end of the connecting spring 371 is provided with a top block 372, which is fixedly connected to the top of the locking block 36 by screws, converting the spring force into a pushing force on the locking block 36. The top of the locking block 36 is protruding, and the area of ​​the protrusion is larger than the cross-sectional area of ​​the sliding groove 35, preventing the locking block 36 from sliding into the interior of the diverter tube 3 from the sliding groove 35. The other end of the connecting spring 371 is rotatably provided with a threaded sleeve 373, which is threadedly connected to the inner wall of the pressure tube 34. The spring preload can be precisely adjusted by rotating the threaded sleeve 373.

[0045] After the flue gas duct is repaired, the valve plate 43 can be automatically reset by unscrewing the sleeve 373 and then pulling out the locking block 36 through the connection between the top block 372 and the locking block 36, so that the alarm device can be used again.

[0046] Specifically, the alarm component 7 includes an exhaust pipe 71 fixedly connected to the collection cylinder 5. An airflow speaker 72 is threadedly connected inside the exhaust pipe 71. When clean air passes through the exhaust pipe 71, it drives the airflow speaker 72 to generate a sound wave signal. The sound intensity is proportional to the airflow speed and can provide a graded alarm function. This is existing technology and can be clearly understood by those skilled in the art, so it will not be described in detail here.

[0047] During use, when the pipeline pressure is normal, a negative pressure is formed and maintained inside the sleeve 41 through the system consisting of the air guide ring 31, the flow guide pipe 32, and the air injection hole 33. This negative pressure generates an adsorption force on the piston rod 42, causing the valve plate 43 to be tightly pressed against the opening of the diversion pipe 3. At this time, the entire alarm device is isolated from the operating flue gas pipeline and does not affect the normal operation of the system.

[0048] When a blockage occurs in the flue gas duct, causing the duct pressure to exceed the set threshold, the abnormally high pressure flue gas will exert a thrust on the valve plate 43, which will overcome the suction force of the negative pressure in the sleeve 41. The piston rod 42 will be pushed, causing the valve plate 43 to leave the pipe opening, the pressure relief channel will be opened, and the high pressure flue gas will quickly flow into the front cavity of the collection cylinder 5 through the opened diversion pipe 3.

[0049] After the valve plate 43 moves a certain distance, the locking block 36 on the wall of the diversion pipe 3 is pushed by the spring assembly 37 and pops out through the sliding groove 35, locking between the valve plate 43 and the wall of the diversion pipe 3, mechanically locking the valve plate 43 in the "open" position, preventing the valve plate 43 from automatically resetting when the pipeline pressure fluctuates and drops briefly, ensuring continuous pressure relief and alarm.

[0050] Then, the high-pressure flue gas entering the front chamber of the collection cylinder 5 pushes the sliding plate 61 of the isolation component 6 to move backward. The sliding plate 61 slides smoothly along the optical axis 63, compressing the clean air in its rear chamber. The compressed clean air is discharged at high speed through the exhaust pipe 71, driving the airflow speaker 72 installed on the exhaust pipe 71 to emit a loud alarm sound.

[0051] When the pipeline fault is cleared and normal operation needs to be restored, the operator uses a tool to unscrew the threaded sleeve 373 inside the clamping pipe 34. The unscrewed threaded sleeve 373 brings out the connecting spring 371 and drives the top block 372 to retract, thereby pulling the locking block 36 back from the locked position into the sliding groove 35.

[0052] After the locking block 36 retracts, the valve plate 43 is pulled back and resealed at the opening of the diversion pipe 3 under the suction effect of the negative pressure inside the sleeve 41, and the equipment returns to its initial standby state.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A safety alarm device applied to a wet desulfurization unit, characterized in that: include, The connecting pipe (1) is provided with connecting flanges (2) at both ends for connecting to the flue gas pipeline of the wet desulfurization unit. The side wall of the connecting pipe (1) is provided with a diversion pipe (3), which is connected to the connecting pipe (1). The pressure relief assembly (4) is located inside the diversion pipe (3) and includes several sleeves (41). The sleeves (41) are fixedly located inside the diversion pipe (3). A piston rod (42) is slidably arranged inside the sleeve (41). One end of the piston rod (42) extending out of the sleeve (41) is fixedly connected to a valve plate (43). The collecting cylinder (5) is fixedly connected to the end of the diversion pipe (3) away from the connecting pipe (1), and the collecting cylinder (5) is provided with an isolation component (6). The alarm component (7) is fixedly connected to the collection tube (5) and is located at the end of the collection tube (5) away from the diversion pipe (3).

2. The safety alarm device applied to a wet desulfurization unit as described in claim 1, characterized in that: The outer surface of the connecting pipe (1) is corrugated, and the corrugated pipe section is composed of continuous and uniform annular peaks and troughs, so that its outer surface presents a regular corrugated shape.

3. The safety alarm device applied to a wet desulfurization unit as described in claim 2, characterized in that: Both connecting flanges (2) are fixedly provided with connecting ears (21) on their outer periphery, and the connecting ears (21) at both ends are connected to adjusting screws (22).

4. The safety alarm device applied to a wet desulfurization unit as described in claim 3, characterized in that: The valve plate (43) is tapered, and a positioning groove (44) that mates with the sleeve (41) is provided on the outer periphery of the tapered shape. A rubber sealing sheet (45) is provided on the side of the valve plate (43) facing the diversion pipe (3).

5. The safety alarm device applied to a wet desulfurization unit as described in claim 4, characterized in that: The outer periphery of the diversion pipe (3) is fitted with a gas guide ring (31), and the inner side of the gas guide ring (31) is provided with a guide pipe (32) that communicates with the sleeve (41) to connect the gas guide ring (31) and the sleeve (41). The side wall of the gas guide ring (31) is provided with an air injection hole (33).

6. The safety alarm device applied to a wet desulfurization unit as described in claim 5, characterized in that: The isolation assembly (6) includes a sliding plate (61) slidably disposed inside the collection cylinder (5) for dividing the collection cylinder (5) into two independent cavities, and a sealing ring (62) is provided on the outer periphery of the sliding plate (61).

7. The safety alarm device applied to a wet desulfurization unit as described in claim 6, characterized in that: The sliding plate (61) has several optical axes (63) slidably arranged inside, and the two ends of the optical axes (63) are fixedly connected to the inner end wall of the collecting cylinder (5).

8. The safety alarm device applied to a wet desulfurization unit as described in claim 7, characterized in that: A clamping tube (34) is provided on the pipe wall of the diverter (3) at a position corresponding to the valve plate (43). A sliding groove (35) is provided on the diverter (3) at a position corresponding to the clamping tube (34). A locking block (36) is slidably provided inside the sliding groove (35). A spring assembly (37) is provided inside the clamping tube (34).

9. The safety alarm device applied to a wet desulfurization unit as described in claim 8, characterized in that: The spring assembly (37) includes a connecting spring (371) which is disposed inside the clamping tube (34). One end of the connecting spring (371) is provided with a top block (372), which is fixedly connected to the top of the locking block (36). The other end of the connecting spring (371) is rotatably provided with a threaded sleeve (373), which is threadedly connected to the inner wall of the clamping tube (34).

10. The safety alarm device applied to a wet desulfurization unit as described in claim 9, characterized in that: The alarm component (7) includes an exhaust pipe (71) fixedly connected to the collection cylinder (5), and an airflow speaker (72) is provided inside the exhaust pipe (71) by a threaded connection.

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