A pipe connection structure for flue gas desulfurization and denitrification

Abstract

A pipe connection structure for flue gas desulfurization and denitrification belongs to the field of pipe connection and includes two pipes connected by a connecting box. The sides of the connecting box are provided with slots that communicate with the pipes in sequence, corresponding to the pipes. A rotating tube is rotatably installed in the connecting box, and the slots on both sides are connected by the rotating tube. The pipes, slots, and rotating tube form a flue gas duct, and a spiral blade ring is provided in the flue gas duct. The present invention has a simple structure and an ingenious design. The spiral blade ring is used to form a spiral airflow with a smaller airflow, thereby increasing the airflow's cleaning effect on the flue gas duct. A larger airflow causes the spiral blade ring to rotate, which scrapes and cleans the inner wall of the duct, reducing smoke dust accumulation and blockage in the flue gas duct. This invention can meet actual needs and is suitable for promotion.

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 used in some chemical industries. During the flue gas desulfurization and denitrification process, 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 due to the gravity of the smoke dust, but the smoke dust in the horizontal pipes is not easy to clean and is easy to accumulate, causing pipe blockage, and cleaning is relatively cumbersome. To solve the above problems, we have invented a flue gas desulfurization and denitrification pipe connection structure that is easy to clean the smoke dust in the flue gas pipe. Summary of the Invention

[0003] The present invention provides a pipe 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:

[0005] A pipe connection structure for flue gas desulfurization and denitrification includes two pipes, which are connected by a connecting box. The sides of the connecting box are sequentially provided with through grooves connected to the pipes corresponding to the pipes. A rotating pipe is rotatably installed in the connecting box. The through grooves on both sides are connected by the rotating pipe. The pipes, through grooves and 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.

[0006] As described above, a pipe connection structure for flue gas desulfurization and denitrification is formed, the outer periphery of the rotating tube and the interior of the connecting box form an annular cavity, the interior of the annular cavity is isolated from the interior of the flue gas tube, 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 slidingly 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 grooves are respectively provided on the inner periphery of the rotating ring, sliding rods are respectively slidably installed in the rotating arc-shaped grooves, and the sliding rods are fixedly connected to the corresponding piston rods.

[0007] In the above-mentioned pipe connection structure for flue gas desulfurization and denitrification, an exhaust hole is provided on the side wall of the connection box.

[0008] The advantages of the present invention are: the present invention has a simple structure and an ingenious design. It utilizes a spiral blade ring to form a spiral airflow from a smaller airflow, thereby increasing the cleaning effect of the airflow on the flue gas duct; the larger airflow causes the spiral blade ring to rotate, and the spiral blade ring scrapes and cleans the inner wall of the duct, 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

[0009] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to 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 any creative labor.

[0010] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 yes Figure 1 A partial enlarged view of Ⅰ.

[0011] 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

[0012] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0013] 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 together by bolts. The side of the connecting box 2 corresponds to the pipe 1 and is sequentially provided with a through groove 3 connected 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 to the flow of flue gas. 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. It uses a spiral blade ring 5 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 5 to rotate, and the spiral blade ring 5 scrapes and cleans the inner wall of the duct 1, reducing the accumulation and blockage of smoke dust in the flue gas duct, which can meet actual needs and is suitable for promotion. This device is suitable for use in horizontal ducts. When this device is used, the two ducts 1 are connected through the connecting box 2, and the two ends of the spiral blade ring 5 extend into the corresponding duct 1. When the smoke airflow is small, the smoke flows through the spiral blade ring 5 to form a spiral airflow, which impacts the inner wall of the smoke duct, and has a better cleaning effect on the smoke 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, it can scrape off the smoke dust attached to the inner wall of the duct 1, thereby increasing the cleaning effect on the duct 1.

[0014] 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 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 through sealed bearings respectively. 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 through one-way bearings respectively, and the outer periphery of the rotating ring 21 is fixedly connected to the inner ring of the one-way bearing. The outer rings of the one-way bearings are fixedly connected to the connecting boxes 2, and the outer periphery of the rotating tube 4 is fixedly installed with several piston cylinders 22 evenly distributed along the circumference of the rotating tube 4. In this embodiment, there are four rotating rings 21 and piston cylinders 22. The four piston cylinders 22 are evenly distributed along the circumference of the rotating tube 4 and are respectively located at the upper side, lower side, front side and rear side of the rotating tube 4. A piston 23 is provided in the piston cylinder 22 in an airtight sliding fit. The piston 23 is connected to the piston cylinder 22 by a spring 24. A piston 23 is fixedly installed on the piston 23. The piston rod 25 and the spring 24 are sleeved on the outer circumference 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. The inner circumference of the rotating ring 21 is provided with arc-shaped grooves 26, and the arc-shaped grooves 26 are inclined. When the slide rod 27 slides along the arc-shaped grooves 26, the arc-shaped grooves 26 can rotate along the axis of the rotating ring 21 with the rotating ring 21. The slide rods 27 are respectively slidably installed in the arc-shaped 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 of the flue gas duct, when the piston cylinder 22 is 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 rod 27 to move outward. The spring 24 is compressed and stores energy, and the slide rod 27 slides along the corresponding arc-shaped slide groove 26. The slide rod 27 applies a force to the rotating ring 21 to rotate forward. Since the rotating ring 21 and the connecting box 2 are connected in rotation by a one-way bearing, the rotating ring 21 cannot rotate forward under the action of the one-way bearing. Therefore, the rotating ring 21 applies a force to the slide rod 27 to rotate in the opposite direction. The slide rod 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 rod 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 rod 27 to move inward and reset, and the slide rod 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. When the spiral blade ring 5 rotates, it scrapes and cleans the inner wall of the pipe 1. At the same time, the spiral blade ring 5 can push the scraped smoke and dust to one end of the flue gas pipe, and discharge the smoke from the smoke pipe with the flow of smoke, thereby realizing automatic cleaning of the inner wall of the smoke pipe.

[0015] Specifically, such as 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, thereby preventing the high pressure formed inside the annular cavity 20 from causing the gas between the piston cylinder 22 and the piston 23 to not expand normally.

[0016] 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 various 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 surfaces of the connection box (2) corresponding to the pipes (1) being sequentially provided with through grooves (3) connected to the pipes (1), characterized in that: A rotating tube (4) is rotatably installed in the connecting box (2), and the through grooves (3) on both sides are connected through the rotating tube (4). The tube (1), the through groove (3) and the rotating tube (4) form a flue gas duct. A spiral blade ring (5) is provided in the flue gas duct. 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 tube (1). The outer periphery 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) is isolated from the interior of the flue gas duct. A row of several rotating rings (21) are provided in the connecting box (2). The rotating rings (21) are respectively connected to the rotating tube (4). The moving tube (4) is coaxially arranged, and the rotating ring (21) and the connecting box (2) are respectively connected in rotation 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 periphery of the rotating tube (4). A piston (23) is provided in the piston cylinder (22) in an airtight sliding fit. 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 periphery of the rotating ring (21). Slide rods (27) are respectively slidably installed in the rotating arc-shaped sliding grooves (26). The slide rods (27) are fixedly connected to the corresponding piston rods (25).

2. A flue gas desulfurization and denitrification pipe connection structure according to claim 1, characterized in that: An exhaust hole (30) is provided on the side wall of the connection box (2).

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