Intelligent low-temperature anti-corrosion pipeline for sulfur-containing flue gas

Abstract

The utility model discloses an intelligent low-temperature anti-corrosion pipeline for sulfur-containing flue gas, and particularly relates to the technical field of pipeline corrosion prevention, the intelligent low-temperature anti-corrosion pipeline for the sulfur-containing flue gas comprises a pipeline, a mounting seat is arranged on the outer side of the pipeline, and a temperature instrument, an acid dew point instrument, a heating frame and an intelligent controller are matched for use, so that the acid dew point value of the sulfur-containing flue gas can be monitored on line in real time; the temperature of the sulfur-containing flue gas is always above the acid dew point, so that the occurrence of low-temperature corrosion accidents of the sulfur-containing flue gas is prevented, the pipeline corrosion prevention effect is achieved, the heat transfer problem of the sulfur-containing flue gas is not influenced, and the problems of matching and compatibility between a coating or a coating film and an existing pipeline are solved; according to the utility model, through the fixing mechanism, the mounting seat and the pipeline can be conveniently and quickly connected and fixed, and the mounting seat and the pipeline can be conveniently disassembled, so that the temperature instrument, the acid dew point instrument and the heating frame can be maintained, repaired or replaced; and the sealing assembly is arranged, so that the sealing performance among the temperature instrument, the acid dew point instrument, the heating frame and the pipeline can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline anti-corrosion, in particular to an intelligent low-temperature anti-corrosion pipeline for sulfur-containing flue gas. Background Technique

[0002] In various industries such as thermal power plants, chemical plants, and metal smelting plants where there are manufacturers producing sulfur-containing flue gas, corrosion accidents of sulfur-containing flue gas transmission pipelines often occur. The fundamental reason is that the composition of sulfur-containing flue gas has been fluctuating with the production conditions, resulting in the continuous fluctuation of the sulfur-containing flue gas dew point. When the actual temperature is lower than the acid dew point, sulfur trioxide and water react to form sulfuric acid, thus causing pipeline corrosion accidents.

[0003] A new type of anti-corrosion composite pipe, patent number: CN201120138064.X, uses an anti-corrosion composite pipe with an enamel coating on the surface of the pipe body and a fluoroplastic film layer on the surface of the enamel coating. Through these two coatings of enamel or plastic, double effective protection can be achieved, effectively preventing erosive gases and protecting the underlying steel pipeline from corrosion.

[0004] An on-line coating method for the inner wall of high-sulfur gas field gathering pipelines and pressure vessels, patent number: CN201510110711.9, uses an inner wall coating anti-corrosion technology to treat the inner wall of high-sulfur gas field gathering pipelines and pressure vessels, forming a coating with a thickness greater than 80μm on the inner wall, effectively slowing down the corrosion of pipelines and pressure vessels.

[0005] The above-mentioned methods for anti-corrosion of pipelines used for transporting sulfur-containing flue gas all achieve anti-corrosion protection of pipelines by applying protective coatings or films. These methods will affect the heat transfer of sulfur-containing flue gas, and there are also problems of matching and compatibility between the coatings or films and existing pipelines. Content of the Utility Model

[0006] The purpose of the utility model is to provide an intelligent low-temperature anti-corrosion pipeline for sulfur-containing flue gas to solve the problems raised in the above background technique.

[0007] To solve the above technical problems, the present utility model provides the following technical solutions: An intelligent low-temperature anti-corrosion pipeline for sulfur-containing flue gas, including a pipeline, an installation seat is provided outside the pipeline, the inner top wall of the installation seat is sequentially threadedly connected with a heating rack acid dew point meter and a thermometer from left to right, a smart controller electrically connected to the thermometer, the acid dew point meter and the heating rack is provided on one side of the top of the installation seat, the lower ends of the thermometer, the acid dew point meter and the heating rack all extend into the pipeline, a through groove is provided on the side wall of the part of the heating rack located inside the pipeline, and a resistance wire is provided in the through groove, sealing components connected to the pipeline are provided outside the thermometer, the acid dew point meter and the heating rack, a fixing mechanism connected to the pipeline is provided outside the installation seat, the fixing mechanism further includes a steel strip one and a steel strip two, and the steel strip one and the steel strip two are symmetrically arranged on both sides of the installation seat, and the lower end of the steel strip one is connected with a fixing block.

[0008] Further, the fixing mechanism further includes a fixing cylinder, and the fixing cylinder is fixedly installed at the bottom of the fixing block. A trigger cylinder is movably installed inside the fixing cylinder, and the lower end of the trigger cylinder extends outside the fixing cylinder. Gears are symmetrically arranged inside the trigger cylinder, and the connecting shafts of the gears are rotatably connected to the inner wall of the fixing cylinder through bearings. A rail groove one adapted to the connecting shaft of the gear is provided on the side wall of the trigger cylinder. A plurality of tooth grooves one meshing with the gears are symmetrically provided on the inner wall of the trigger cylinder. An insertion rod is provided between the two gears, and a plurality of tooth grooves two meshing with the gears are symmetrically provided on the side wall of the insertion rod. An installation groove penetrating the steel strip two is provided at one end of the steel strip two, and the installation groove is adapted to the steel strip two. One end of the fixing cylinder penetrates the steel strip two and is inserted into a jack provided at the top of the installation groove. A plurality of through holes adapted to the insertion rod are provided on the side wall of the steel strip two. Slide grooves are symmetrically provided on the inner wall of the fixing cylinder. A slide rod is fixedly installed in the slide groove. A spring and a slider are respectively sleeved on the outside of the slide rod up and down, and the slider is fixedly connected to the trigger cylinder. The setting of the fixing mechanism can facilitate the quick connection and disassembly between the installation seat and the pipeline, so as to install structures such as the thermometer, the acid dew point meter and the heating rack on the pipeline, or disassemble them for maintenance, repair and replacement.

[0009] Further, the sealing component includes a sealing seat, the sealing seat is fixedly installed on the top of the pipeline, and there are several sealing seats. The several sealing seats are respectively sleeved outside the heating rack, the acid dew point meter and the thermometer. Sealing covers are sleeved outside the thermometer, the acid dew point meter and the heating rack, and sealing rings are provided at the bottoms of the sealing covers. Sealing grooves adapted to the sealing rings are provided on the top of the sealing seats. The setting of the sealing component can keep good sealing performance between the thermometer, the acid dew point meter and the heating rack and the pipeline.

[0010] Further, a fixing ring is sleeved outside the insertion rod, and the fixing ring is fixedly connected to the bottom of the fixing block. Guide blocks are symmetrically provided on the inner wall of the fixing ring, and rail grooves two are symmetrically provided on the outer wall of the insertion rod to guide and limit the insertion rod.

[0011] Furthermore, an opening is provided on one side of the trigger cylinder away from the fixed block, and the opening is adapted to the insertion rod to prevent blocking the insertion rod and affecting its movement.

[0012] Furthermore, the mounting seat is arc-shaped, the fixed block and the second steel belt are both flexible steel belts, and the through holes on the second steel belt are arranged in a linear equidistant array so as to be adapted to the pipeline. The use of the second steel belt can also be adapted to the pipeline, and the corresponding through holes can be selected for fixation according to needs, so as to better connect and fix with the pipeline.

[0013] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:

[0014] 1. Through the coordinated use of the thermometer, acid dew point meter, heating rack and intelligent controller in the present utility model, when the acid dew point value is more than 5°C less than the sulfur-containing flue gas temperature value, the sulfur-containing flue gas flows normally; when the sulfur-containing flue gas temperature value - acid dew point value ≤ 1°C, the resistance wire is turned on for heating until the acid dew point is more than 5°C higher than the sulfur-containing flue gas temperature, and the work of the resistance wire is automatically turned off to stop heating. It can monitor the acid dew point value of the sulfur-containing flue gas in real time and online, and keep the temperature of the sulfur-containing flue gas always above the acid dew point, preventing the occurrence of low-temperature corrosion accidents of the sulfur-containing flue gas, playing a role in pipeline anti-corrosion, and not affecting the heat transfer problem of the sulfur-containing flue gas. There are no problems with the matching and compatibility of the coating or film with the existing pipeline;

[0015] 2. Through the fixing mechanism in the present utility model, the mounting seat can be conveniently and quickly connected and fixed to the pipeline, and it is convenient to disassemble it for maintaining, repairing or replacing the thermometer, acid dew point meter and heating rack; the setting of the sealing component can improve the sealing performance between the thermometer, acid dew point meter and heating rack and the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0017] Figure 1 is the overall structural schematic diagram of the present utility model;

[0018] Figure 2 is the partial cross-sectional structural schematic diagram between the pipeline and the mounting seat of the present utility model;

[0019] Figure 3 is the present utility model Figure 1 the enlarged structural schematic diagram of A therein;

[0020] Figure 4 is the structural schematic diagram between the trigger cylinder and the insertion rod of the present utility model;

[0021] Figure 5 is a schematic structural view of the mounting seat of the present utility model;

[0022] In the figure: 1, pipeline; 2, mounting seat; 3, intelligent controller; 4, thermometer; 5, acid dew point meter; 6, heating rack; 7, resistance wire; 8, sealing seat; 9, sealing cover; 10, sealing ring; 11, first steel strip; 12, fixing block; 13, second steel strip; 14, fixing cylinder; 15, triggering cylinder; 16, gear; 17, inserting rod; 18, sliding rod; 19, sliding block; 20, spring; 21, fixing ring; 22, guiding block. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Such as Figure 1 - Figure 5An intelligent low-temperature anti-corrosion pipeline for sulfur-containing flue gas shown in the figure includes a pipeline 1. An installation seat 2 is provided on the outer side of the pipeline 1. The inner top wall of the installation seat 2 is sequentially threadedly connected with a heating rack 6, an acid dew point meter 5, and a thermometer 4 from left to right. On one side of the top of the installation seat 2, there is an intelligent controller 3 electrically connected to the thermometer 4, the acid dew point meter 5, and the heating rack 6. In this example, a single-chip microcomputer is provided in the intelligent controller 3 to control the operation of the heating rack 6 according to the data monitored by the thermometer 4 and the acid dew point meter 5. The thermometer 4 is a temperature detector, and the acid dew point meter 5 is an acid dew point detector. The lower ends of the thermometer 4, the acid dew point meter 5, and the heating rack 6 are all inserted into the pipeline 1. The side wall of the part of the heating rack 6 located inside the pipeline 1 is provided with through grooves, and a resistance wire 7 is provided in the through grooves. Sealing components connected to the pipeline 1 are provided on the outer sides of the thermometer 4, the acid dew point meter 5, and the heating rack 6. A fixing mechanism connected to the pipeline 1 is provided on the outer side of the installation seat 2. The fixing mechanism further includes a steel strip 11 and a steel strip 13, and the steel strip 11 and the steel strip 13 are symmetrically arranged on both sides of the installation seat 2. The lower end of the steel strip 11 is connected with a fixing block 12. In this example, the fixing mechanism further includes a fixing cylinder 14, and the fixing cylinder 14 is fixedly installed at the bottom of the fixing block 12. A trigger cylinder 15 is movably installed inside the fixing cylinder 14, and the lower end of the trigger cylinder 15 extends outside the fixing cylinder 14. Gears 16 are symmetrically provided inside the trigger cylinder 15, and the connecting shafts of the gears 16 are rotatably connected to the inner wall of the fixing cylinder 14 through bearings. A track groove 1 adapted to the connecting shaft of the gear 16 is provided on the side wall of the trigger cylinder 15. A plurality of tooth grooves 1 meshing with the gears 16 are symmetrically provided on the inner wall of the trigger cylinder 15. An insertion rod 17 is provided between the two gears 16, and a plurality of tooth grooves 2 meshing with the gears 16 are symmetrically provided on the side wall of the insertion rod 17. An installation groove penetrating the steel strip 13 is provided at one end of the steel strip 13, and the installation groove is adapted to the steel strip 13. One end of the fixing cylinder 14 penetrates the steel strip 13 and is inserted into a jack provided at the top of the installation groove. A plurality of through holes adapted to the insertion rod 17 are provided on the side wall of the steel strip 13. Slide grooves are symmetrically provided on the inner wall of the fixing cylinder 14, and slide rods 18 are fixedly installed in the slide grooves. A spring 20 and a slider 19 are respectively sleeved on the outer side of the slide rod 18 from top to bottom, and the slider 19 is fixedly connected to the trigger cylinder 15. The setting of the fixing mechanism can facilitate the quick connection and disassembly between the installation seat 2 and the pipeline 1, so as to install structures such as the thermometer 4, the acid dew point meter 5, and the heating rack 6 on the pipeline 1, or disassemble them for maintenance, repair, and replacement. In this example, the sealing component includes a sealing seat 8. The sealing seat 8 is fixedly installed on the top of the pipeline 1, and a plurality of sealing seats 8 are provided. The plurality of sealing seats 8 are respectively sleeved on the outer sides of the heating rack 6, the acid dew point meter 5, and the thermometer 4. Sealing covers 9 are sleeved on the outer sides of the thermometer 4, the acid dew point meter 5, and the heating rack 6, and a sealing ring 10 is provided at the bottom of the sealing cover 9. A sealing groove adapted to the sealing ring 10 is provided at the top of the sealing seat 8. The setting of the sealing component can keep good sealing performance between the thermometer 4, the acid dew point meter 5, and the heating rack 6 and the pipeline 1.

[0025] In this example, a fixing ring 21 is sleeved outside the inserting rod 17, and the fixing ring 21 is fixedly connected to the bottom of the fixing block 12. Guide blocks 22 are symmetrically arranged on the inner wall of the fixing ring 21, and second rail grooves are symmetrically formed on the outer wall of the inserting rod 17 to guide and limit the inserting rod 17. In this example, an opening is formed on one side of the trigger cylinder 15 away from the fixing block 12, and the opening is adapted to the inserting rod 17 to avoid blocking the inserting rod 17 and affecting its movement. In this example, the mounting seat 2 is arc-shaped, the fixing block 12 and the second steel belt 13 are both flexible steel belts, and the through holes on the second steel belt 13 are arranged in a linear equidistant array to adapt it to the pipeline 1. The use of the second steel belt 13 can also be adapted to the pipeline 1, and corresponding through holes can be selected for fixing according to needs among several through holes, so as to better connect and fix with the pipeline 1.

[0026] Working principle of the utility model: During use, the thermometer 4 and the acid dew point meter 5 are used to monitor the temperature and acid dew point value of the sulfur-containing flue gas passing through the pipeline 1 in real time, and the monitoring data is transmitted to the intelligent controller 3. The single-chip microcomputer in the intelligent controller 3 performs calculations. When the acid dew point value is more than 5°C lower than the sulfur-containing flue gas temperature value, the sulfur-containing flue gas flows normally. When the sulfur-containing flue gas temperature value - acid dew point value ≤ 1°C, the resistance wire 7 is turned on for heating until the acid dew point is more than 5°C higher than the sulfur-containing flue gas temperature, and then the operation of the heating resistance wire 7 is automatically turned off to stop heating, enabling real-time online monitoring of the acid dew point value of the sulfur-containing flue gas. The intelligent controller 3 is used to adjust the resistance wire 7 to keep the temperature of the sulfur-containing flue gas always above the acid dew point, preventing accidents of low-temperature corrosion of the pipeline 1 by the sulfur-containing flue gas; when it is necessary to disassemble the mounting seat 2, the trigger cylinder 15 can be pressed to move into the fixed cylinder 14, so that the tooth groove in the trigger cylinder 15 drives the gear 16 to rotate, and the gear 16 cooperates with the second tooth groove to drive the plug rod 17 to move, and the plug rod 17 stably moves away from the fixed block 12 under the limit and guidance of the fixed ring 21 and the guide block 22. At the same time, the movement of the trigger cylinder 15 also drives the slider 19 to slide along the slide rod 18 and compress the spring 20. When one end of the plug rod 17 passing through the through hole on the second steel belt 13 moves below the second steel belt 13, the second steel belt 13 can be taken out from the mounting groove opened on the second steel belt 13, and then the mounting seat 2 can be disassembled by pulling it up, so that the thermometer 4, the acid dew point meter 5, the heating rack 6 and other structures can be maintained and repaired. The threaded connection between the thermometer 4, the acid dew point meter 5, the heating rack 6 and the mounting seat 2 can separate them from the mounting seat 2 for maintenance, repair or replacement; when connecting and fixing the mounting seat 2 to the pipeline 1, the mounting seat 2 can be covered outside the pipeline 1, and the thermometer 4, the acid dew point meter 5 and the heating rack 6 can be inserted into the pipeline 1. Then, the steps during disassembly can be repeated, so that the upper end of the plug rod 17 moves below the mounting groove, and then one end of the second steel belt 13 is passed through the mounting groove and adjusted according to the diameter of the pipeline 1, so that the second steel belt 13 and the fixed block 12 and the first steel belt 11 cooperate to surround the outside of the pipeline 1. When the second steel belt 13 moves to the appropriate position, the force applied to the trigger cylinder 15 can be released, so that the trigger cylinder 15 moves back under the elastic force of the spring 20, thereby driving the plug rod 17 to move back through the corresponding through hole on the second steel belt 13 and inserting it into the jack, completing the limit fixation of the second steel belt 13, and thus completing the connection and fixation between the mounting seat 2 and the pipeline 1, which is convenient to use and has stronger practicability.

[0027] Finally, it should be noted that the above are only preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An intelligent low-temperature anti-corrosion pipeline for sulfur-containing flue gas, comprising a pipeline (1), characterized in that: An installation seat (2) is arranged on the outer side of the pipeline (1). The inner top wall of the installation seat (2) is sequentially and threadedly connected with a heating rack (6), an acid dew point meter (5) and a thermometer (4) from left to right. A smart controller (3) electrically connected to the thermometer (4), the acid dew point meter (5) and the heating rack (6) is arranged on one side of the top of the installation seat (2). The lower ends of the thermometer (4), the acid dew point meter (5) and the heating rack (6) are all inserted into the pipeline (1). A through groove is formed in a partial side wall of the heating rack (6) located inside the pipeline (1), and a resistance wire (7) is arranged in the through groove. Sealing assemblies connected to the pipeline (1) are arranged on the outer sides of the thermometer (4), the acid dew point meter (5) and the heating rack (6). A fixing mechanism connected to the pipeline (1) is arranged on the outer side of the installation seat (2). The fixing mechanism further includes a first steel strip (11) and a second steel strip (13), and the first steel strip (11) and the second steel strip (13) are symmetrically arranged on both sides of the installation seat (2). The lower end of the first steel strip (11) is connected with a fixing block (12).

2. The intelligent low-temperature anti-corrosion pipeline for sulfur-containing flue gas according to claim 1, characterized in that: The fixing mechanism further includes a fixing cylinder (14), and the fixing cylinder (14) is fixedly installed at the bottom of the fixing block (12). A trigger cylinder (15) is movably installed inside the fixing cylinder (14), and the lower end of the trigger cylinder (15) extends outside the fixing cylinder (14). Gears (16) are symmetrically arranged inside the trigger cylinder (15), and the connecting shafts of the gears (16) are rotatably connected to the inner wall of the fixing cylinder (14) through bearings. A rail groove one adapted to the connecting shafts of the gears (16) is formed in the side wall of the trigger cylinder (15). A plurality of tooth grooves one meshing with the gears (16) are symmetrically formed in the inner wall of the trigger cylinder (15). An inserting rod (17) is arranged between the two gears (16), and a plurality of tooth grooves two meshing with the gears (16) are symmetrically formed in the side wall of the inserting rod (17). An installation groove penetrating through the second steel strip (13) is formed at one end of the second steel strip (13), and the installation groove is adapted to the second steel strip (13). One end of the fixing cylinder (14) penetrates through the second steel strip (13) and is inserted into a jack formed at the top of the installation groove. A plurality of through holes adapted to the inserting rod (17) are formed in the side wall of the second steel strip (13). Slide grooves are symmetrically formed in the inner wall of the fixing cylinder (14), and slide rods (18) are fixedly installed in the slide grooves. A spring (20) and a slider (19) are respectively sleeved on the outer sides of the slide rods (18) up and down, and the slider (19) is fixedly connected to the trigger cylinder (15).

3. The intelligent low-temperature anti-corrosion pipeline for sulfur-containing flue gas according to claim 1, characterized in that: The sealing assembly includes a sealing seat (8). The sealing seat (8) is fixedly installed on the top of the pipeline (1), and a plurality of the sealing seats (8) are provided. The plurality of sealing seats (8) are respectively sleeved on the outer sides of the heating rack (6), the acid dew point meter (5) and the thermometer (4). Sealing covers (9) are sleeved on the outer sides of the thermometer (4), the acid dew point meter (5) and the heating rack (6), and sealing rings (10) are arranged at the bottoms of the sealing covers (9). Sealing grooves adapted to the sealing rings (10) are formed at the tops of the sealing seats (8).

4. An intelligent low-temperature anti-corrosion pipeline for sulfur-containing flue gas according to claim 2, characterized in that: A fixing ring (21) is sleeved outside the inserting rod (17), and the fixing ring (21) is fixedly connected to the bottom of the fixing block (12). Guide blocks (22) are symmetrically arranged on the inner wall of the fixing ring (21), and second rail grooves are symmetrically formed in the outer wall of the inserting rod (17).

5. The intelligent low-temperature anti-corrosion pipeline for sulfur-containing flue gas according to claim 2, characterized in that: An opening is formed in one side of the trigger cylinder (15) away from the fixing block (12), and the opening is adapted to the inserting rod (17).

6. The intelligent low-temperature anti-corrosion pipeline for sulfur-containing flue gas according to claim 2, characterized in that: The mounting seat (2) is arc-shaped. Both the fixing block (12) and the second steel belt (13) are flexible steel belts, and the through holes in the second steel belt (13) are arranged in a linear equidistant array.

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