Pipeline connecting structure for flue gas desulfurization and denitrification

Abstract

A pipeline connecting structure for flue gas desulfurization and denitrification belongs to the field of pipeline connection and comprises two pipelines, the two pipelines are communicated and connected through a connecting box, through grooves communicated with the pipelines are sequentially formed in the side face of the connecting box and correspond to the pipelines, a rotating pipe is rotatably installed in the connecting box, and the through grooves in the two sides are communicated through the rotating pipe. The pipeline, the through groove and the rotating pipe form a flue gas pipeline, and a spiral blade ring is arranged in the flue gas pipeline. The device is simple in structure and ingenious in conception, small airflow forms spiral airflow through the spiral blade ring, and the cleaning effect of the airflow on a flue gas pipeline is improved; large airflow enables the spiral blade ring to rotate, the spiral blade ring scrapes and cleans the inner wall of the pipeline, smoke dust accumulation and blockage in the smoke pipeline are reduced, the actual requirement can be met, and the device is suitable for popularization.

Description

Technical Field

[0001] The invention belongs to the field of pipeline connection, in particular to a pipeline connection structure for flue gas desulfurization and denitrification. Background Art

[0002] Flue gas desulfurization and denitrification are boiler flue gas purification technologies belonging to some chemical industries. During the process of flue gas desulfurization and denitrification, pipes are needed to pass the flue gas into the boiler. The flue gas pipes include vertical pipes and horizontal pipes. The dust in the vertical pipes is easy to clean by using the gravity of the smoke, but the smoke in the horizontal pipes is not easy to clean and is easy to accumulate and cause pipe blockage, and the cleaning is relatively cumbersome. In order to solve the above problems, we have invented a pipe connection structure for flue gas desulfurization and denitrification that is easy to clean the smoke in the flue gas pipe. Summary of the invention

[0003] The invention provides a pipeline connection structure for flue gas desulfurization and denitrification, which is used to solve the defects in the prior art.

[0004] The present invention is achieved through the following technical solutions: A pipe connection structure for flue gas desulfurization and denitrification comprises two pipes, which are connected via a connection box. The sides of the connection box are provided with through grooves connected to the pipes in sequence corresponding to the pipes. A rotating pipe is rotatably installed in the connection box. The through grooves on both sides are connected via the rotating pipe. The pipes, the through grooves and the rotating pipe constitute a flue gas pipe. A spiral blade ring is provided in the flue gas pipe. The spiral blade ring is fixedly connected to the rotating pipe. The outer periphery of the spiral blade ring is in sliding contact with the inner periphery of the pipe.

[0005] As described above, a pipe connection structure for flue gas desulfurization and denitrification, the outer periphery of the rotating tube and the interior of the connecting box form an annular cavity, the interior of the annular cavity and the interior of the flue gas tube are isolated from each other, a row of several rotating rings are provided in the connecting box, the rotating rings are respectively coaxially arranged with the rotating tube, the rotating rings and the connecting box are respectively rotatably connected via one-way bearings, several piston cylinders evenly distributed along the circumference of the rotating tube are fixedly installed on the outer periphery of the rotating tube, a piston is airtightly slidably fitted in the piston cylinder, the piston and the piston cylinder are connected by a spring, a piston rod is fixedly installed on the piston, arc-shaped sliding grooves are respectively provided on the inner periphery of the rotating ring, sliding rods are respectively slidably installed in the rotating arc-shaped sliding grooves, and the sliding rods are fixedly connected to the corresponding piston rods.

[0006] In the above-mentioned pipe connection structure for flue gas desulfurization and denitrification, exhaust holes are provided on the side walls of the connection box.

[0007] The advantages of the present invention are: the present invention has a simple structure and ingenious design. It utilizes a spiral blade ring to make a smaller airflow form a spiral airflow, thereby increasing the cleaning effect of the airflow on the flue gas duct; a larger airflow causes the spiral blade ring to rotate, and the spiral blade ring scrapes and cleans the inner wall of the duct, thereby reducing the accumulation and blockage of smoke and dust in the flue gas duct, can meet actual needs, and is suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0009] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 A partial enlarged view of Ⅰ.

[0010] Figure numerals: 1, pipeline, 2, connecting box, 3, through groove, 4, rotating tube, 5, spiral blade ring; 20, annular cavity, 21, rotating ring, 22, piston cylinder, 23, piston, 24, spring, 25, piston rod, 26, arc-shaped slide groove, 27, slide rod, 30, exhaust hole. DETAILED DESCRIPTION

[0011] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0012] A pipe connection structure for flue gas desulfurization and denitrification, such as Figure 1 and Figure 2As shown, it includes two pipes 1, which are connected through a connecting box 2. The connecting box 2 is located between the two pipes 1. A flange is provided at one end of the pipe 1 close to the connecting box 2. A threaded hole is provided on the connecting box 2 corresponding to the connecting hole of the flange. The flange of the pipe 1 and the threaded hole of the connecting box 2 are fastened and connected by bolts. The side of the connecting box 2 is sequentially provided with through grooves 3 connected to the pipe 1 corresponding to the pipe 1. A rotating tube 4 is rotatably installed in the connecting box 2. The through grooves 3 on both sides are connected through the rotating tube 4. The pipe 1, the through groove 3 and the rotating tube 4 constitute a flue gas pipe. The pipe 1, the connecting box 2, the through groove 3 and the rotating tube 4 are coaxially arranged. The inner periphery of the pipe 1, the inner periphery of the through groove 3 and the inner periphery of the rotating tube 4 are in the same curved surface, which can reduce the resistance of the flue gas flow. A spiral blade ring 5 is provided in the flue gas pipe. The spiral blade ring 5 is fixedly connected to the rotating tube 4. The outer periphery of the spiral blade ring 5 is in sliding contact with the inner periphery of the pipe 1, and the middle part of the outer periphery of the spiral blade ring 5 is fixedly connected to the inner periphery of the rotating tube 4. The present invention has a simple structure and an ingenious design. The spiral blade ring 5 is used to make a smaller airflow form a spiral airflow, thereby increasing the cleaning effect of the airflow on the smoke pipe; a larger airflow causes the spiral blade ring 5 to rotate, and the spiral blade ring 5 scrapes and cleans the inner wall of the pipe 1, thereby reducing the accumulation and blockage of smoke and dust in the smoke pipe, and can meet actual needs and is suitable for promotion. The present invention is suitable for use in a transverse pipe. When the present invention is used, the two pipes 1 are connected through a connecting box 2, and the two ends of the spiral blade ring 5 extend into the corresponding pipe 1. When the smoke airflow is small, a spiral airflow is formed when the smoke flows through the spiral blade ring 5, and the spiral airflow impacts the inner wall of the smoke pipe, thereby improving the cleaning effect of the smoke and dust attached to the inner wall; when the smoke airflow is large, the smoke flows through the spiral blade ring 5, which can drive the spiral blade ring 5 to rotate, and the spiral blade ring 5 drives the rotating tube 4 to rotate. When the spiral blade ring 5 rotates, the smoke and dust attached to the inner wall of the pipe 1 can be scraped off, thereby increasing the cleaning effect of the pipe 1.

[0013] Specifically, if Figure 1 and Figure 2As shown, for a transverse flue gas duct with a larger diameter and a longer length, the flow of flue gas in the duct is more likely to be stratified, and the temperature difference between the upper and lower parts may increase, which may generally be around 20°C-50°C; when the flow rate is low, the heat exchange of the flue gas in the duct is mainly based on natural convection, the hot air rises, and the cold air sinks, which may easily cause a large temperature difference between the upper and lower parts, which may reach 30°C-50°C; in cold winter, the ambient temperature around the duct is low, the upper part of the flue gas duct dissipates heat quickly, and the temperature difference between the upper and lower parts may increase to 30°C-50°C. The outer periphery of the rotating tube 4 described in this embodiment forms an annular cavity 20 with the interior of the connecting box 2, and the interior of the annular cavity 20 is isolated from the interior of the flue gas duct. The two ends of the rotating tube 4 are rotatably connected to the side walls on the left and right sides of the connecting box 2 respectively through sealed bearings. A row of several rotating rings 21 are provided in the connecting box 2, and the rotating rings 21 are respectively coaxially arranged with the rotating tube 4. The rotating rings 21 and the connecting box 2 are rotatably connected by one-way bearings. The outer periphery of the rotating ring 21 is The inner ring of the one-way bearing is fixedly connected, and the outer ring of the one-way bearing is fixedly connected to the connecting box 2 respectively. Several piston cylinders 22 evenly distributed along the circumference of the rotating tube 4 are fixedly installed. In this embodiment, there are four rotating rings 21 and piston cylinders 22. The piston cylinders 22 are located in the four directions of up, down, front and back of the rotating tube 4. A piston 23 is airtightly slidably fitted in the piston cylinder 22. The piston 23 is connected to the piston cylinder 22 by a spring 24. A piston rod 25 is fixedly installed on the piston 23. The spring 24 is sleeved on the outer periphery of the piston rod 25. One end of the spring 24 is in contact with the corresponding piston 23, and the other end is connected to the piston cylinder 22. Arc grooves 26 are respectively provided on the inner periphery of the rotating ring 21. The arc grooves 26 are inclined. When the slide rod 27 slides along the arc grooves 26, the arc grooves 26 can be rotated along the axis of the rotating ring 21 with the rotating ring 21. Slide rods 27 are respectively slidably installed in the arc grooves 26, and the slide rods 27 are fixedly connected to the corresponding piston rod 25.Due to the temperature difference between the upper and lower sides inside the flue gas duct, when the piston cylinder 22 is located in the high temperature area, the gas between the piston 23 and the piston cylinder 22 expands due to the heat, and the piston 23 drives the piston rod 25 and the slide bar 27 to move outward, the spring 24 is compressed and stores energy, and the slide bar 27 slides along the corresponding arc-shaped slide groove 26, and the slide bar 27 applies a force for the rotating ring 21 to rotate forward. Since the rotating ring 21 and the connecting box 2 are rotationally connected through a one-way bearing, under the action of the one-way bearing, the rotating ring 21 cannot rotate forward. Therefore, the rotating ring 21 applies a force for the slide bar 27 to rotate in the opposite direction, and the slide bar 27 drives the piston rod 25, the piston 23, the piston cylinder 22, that is, the rotating tube 4 to rotate in the opposite direction along the axis of the rotating tube 4. The rest of the piston cylinder 22, the piston 23, the piston rod 25 , the slide bar 27 and the rotating ring 21 rotate in the opposite direction with the rotating tube 4; after the piston cylinder 22 moves away from the high temperature area, the gas between the piston 23 and the piston cylinder 22 cools and contracts, and at the same time, under the elastic thrust of the spring 24, the piston 23 drives the piston rod 25 and the slide bar 27 to move inward and reset, and the slide bar 27 drives the rotating ring 21 to rotate in the opposite direction through the arc-shaped slide groove 26; similarly, several piston cylinders 22 are located in the high temperature area and the low temperature area in turn, and the above process is continuously circulated, so that the rotating tube 4 drives the spiral blade ring 5 to rotate in the opposite direction continuously, and the spiral blade ring 5 scrapes and cleans the inner wall of the pipeline 1 when rotating. At the same time, the spiral blade ring 5 can push the scraped smoke and dust to one end of the smoke pipe, and discharge the smoke pipe with the flow of smoke, thereby realizing automatic cleaning of the inner wall of the smoke pipe.

[0014] Specifically, Figure 1 and Figure 2 As shown, the side wall of the connection box 2 of this embodiment is provided with an exhaust hole 30. The exhaust hole 30 can discharge the high temperature gas inside the annular cavity 20, so as to prevent the high pressure formed inside the annular cavity 20 from causing the gas between the piston cylinder 22 and the piston 23 to expand abnormally.

[0015] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pipe connection structure for flue gas desulfurization and denitrification, comprising two pipes (1), the two pipes (1) being connected via a connection box (2), the side of the connection box (2) corresponding to the pipes (1) being provided with through grooves (3) connected to the pipes (1) in sequence, characterized in that: A rotating tube (4) is rotatably installed in the connection box (2), the through grooves (3) on both sides are connected through the rotating tube (4), the pipeline (1), the through groove (3) and the rotating tube (4) form a flue gas pipeline, and a spiral blade ring (5) is provided in the flue gas pipeline. The spiral blade ring (5) is fixedly connected to the rotating tube (4), and the outer periphery of the spiral blade ring (5) is in sliding contact with the inner periphery of the pipeline (1).

2. A pipe connection structure for flue gas desulfurization and denitrification according to claim 1, characterized in that: The outer circumference of the rotating tube (4) and the interior of the connecting box (2) form an annular cavity (20), the interior of the annular cavity (20) and the interior of the flue gas duct are isolated from each other, a row of several rotating rings (21) are arranged in the connecting box (2), the rotating rings (21) are respectively coaxially arranged with the rotating tube (4), the rotating rings (21) and the connecting box (2) are respectively rotatably connected via a one-way bearing, a plurality of piston cylinders (22) evenly distributed along the circumference of the rotating tube (4) are fixedly installed on the outer circumference of the rotating tube (4), a piston (23) is airtightly slidably fitted in the piston cylinder (22), the piston (23) and the piston cylinder (22) are connected via a spring (24), a piston rod (25) is fixedly installed on the piston (23), arc-shaped sliding grooves (26) are respectively provided on the inner circumference of the rotating ring (21), sliding rods (27) are respectively slidably installed in the rotating arc-shaped sliding grooves (26), and the sliding rods (27) are fixedly connected to the corresponding piston rods (25).

3. A pipe connection structure for flue gas desulfurization and denitrification according to claim 2, characterized in that: An exhaust hole (30) is provided on the side wall of the connection box (2).

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