Boiler steel pipe type economizer

Abstract

The invention provides a boiler steel pipe type economizer, and belongs to the technical field of feed water heaters. Comprising a shell communicated with a boiler tail flue, supporting parts are rotationally arranged on the two opposite sides of the shell, and heat exchange parts penetrating through the shell are installed on the supporting parts; the shell comprises a top hopper, a connecting box and a bottom hopper which are sequentially connected, and round opening plates are arranged on the two opposite sides of the connecting box. By arranging the supporting component, the supporting rotating plate can be rotated through the handle under the condition that communication between the water outlet main pipe and the water inlet main pipe and an external pipeline is released and limitation of the limiting mechanism on the supporting rotating plate is released, and after the supporting rotating plate rotates by 180 degrees, the positions of the bottom fin heat exchange steel pipes and the top fin heat exchange steel pipes are exchanged; the top fin heat exchange steel pipes are prevented from working under extremely severe working conditions for a long time, the service life of the fin heat exchange steel pipes is guaranteed, the damage probability of the top fin heat exchange steel pipes is reduced, and the use stability of the economizer is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of feedwater heaters, and in particular to a boiler steel tube economizer. Background Art

[0002] Economizer is a device installed at the lower part of the flue at the rear of the boiler to recover the waste heat of the exhaust gas. It heats the boiler feed water into a heating surface of saturated water under the drum pressure. Since it absorbs the heat of high-temperature flue gas, it reduces the exhaust temperature of the flue gas, saves energy and improves efficiency, so it is called an economizer. Economizers sometimes have fins and ribs on the outside of the tube to improve the heat transfer effect.

[0003] Before the exhaust gas passes through the dust collector, there is a large amount of smoke dust in the flue gas. The smoke dust impacts the bottom of the economizer pipe. Under long-term action, it will cause the economizer pipe to leak, which is troublesome to maintain and reduces the service life of the economizer. At the same time, a large amount of smoke dust accumulates on the surface of the economizer, resulting in serious dust accumulation in the economizer, reducing the heat exchange efficiency of the economizer. The solution of the existing technology is mostly regular dust cleaning. On the one hand, dust cleaning is extremely troublesome, especially when fins or ribs are installed on the surface of the economizer, it is more difficult to clean the dust. On the other hand, it is impossible to avoid the problem that the dust accumulation affects the heat exchange efficiency. For this reason, the Chinese patent with the authorization announcement number CN220303618U Disclosed is a boiler economizer, which prevents one side of the heat exchanger from being impacted by smoke for a long time by rotating a heat exchange straight tube in contact with flue gas, and simultaneously arranges a scraper block above the straight tube to scrape off accumulated dust on the surface of the tube and the surface of annular blades to avoid its influence on heat exchange efficiency. Although the device realizes the dust cleaning work on the surface of the heat exchange straight tube by arranging the scraper block, after the dust cleaning is completed by using this method, the position of the top straight tube is not changed and is still in the position firstly contacted with high-temperature smoke. After long-term use, the top straight tube is still prone to damage, affecting the normal operation of the economizer. Therefore, the present application provides a boiler steel tube economizer to meet the demand. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a boiler steel tube economizer to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A boiler steel tube economizer comprises an outer shell connected to a tail flue of the boiler, wherein support components are rotatably arranged on opposite sides of the outer shell, and a heat exchange component penetrating the outer shell is installed on the support components; the outer shell comprises a top bucket, a connecting box and a bottom bucket connected in sequence, and circular openings are opened on opposite sides of the connecting box; the support component comprises two supporting rotating plates rotatably connected to the two circular openings respectively, a plurality of handles are installed on the supporting rotating plates, a plurality of limiting holes are arranged on the supporting rotating plates, and a limiting mechanism for limiting the rotation of the supporting rotating plates is installed on the supporting rotating plates; the heat exchange component comprises a plurality of fin heat exchange steel pipes and connecting elbows connected in an S-shaped structure and installed on the two supporting rotating plates, the two ends of the fin heat exchange steel pipes respectively pass through the two supporting rotating plates, the connecting elbows are located on the side of the two supporting rotating plates away from each other, and the plurality of connected fin heat exchange steel pipes and connecting elbows both enter and exit water through a water outlet main pipe and a water inlet main pipe, and the water outlet main pipe and the water inlet main pipe are installed outside the connecting box.

[0006] Preferably, a dust cleaning component is also installed in the connecting box, and the dust cleaning component includes two dust cleaning rotating plates rotatably connected to the other two opposite sides of the connecting box, one of the dust cleaning rotating plates can be rotated upward, and the other dust cleaning rotating plate can be rotated downward, and the two dust cleaning rotating plates can rotate under the resistance of the fin heat exchange steel tube, and the movable ends of the two dust cleaning rotating plates are normally oriented in the tangential direction of the rotation direction of the heat exchange component, and the movable ends of the dust cleaning rotating plates are installed with a plurality of second cleaning strips corresponding to the position and width of the fins on the fin heat exchange steel tube, and the second cleaning strips have elastic deformation ability, and the movable ends of the dust cleaning rotating plates are also installed with a plurality of second cleaning strips spaced apart from the second cleaning strips A plurality of first cleaning strips are arranged, the width of the first cleaning strips is adapted to the gap size between two adjacent fins on the fin heat exchange steel tube, the two cleaning turn plates are arranged symmetrically with respect to the center, a plurality of spring plates are installed on the two cleaning turn plates, the side of the spring plates away from the cleaning turn plates is connected to the inner wall of the connecting box, a limiting bent rod is installed on the side of the two supporting turn plates close to each other, limiting columns are installed on the two cleaning turn plates, and a plurality of convex strips are installed on the side of the first cleaning strip away from the inner wall of the connecting box; when the heat exchange component is in working state, the two limiting bent rods respectively abut against the two limiting columns, so that the two limiting columns tend to be parallel to the inner wall of the connecting box but do not touch it.

[0007] Preferably, a plurality of cleaning grooves are provided on the second cleaning strip, and adjacent cleaning grooves are arranged in a staggered manner and respectively pass through two sides of the second cleaning strip.

[0008] Preferably, a dust-passing through groove penetrating the dust-cleaning rotating plate is provided at a position close to the rotation center of the dust-cleaning rotating plate whose movable end rotates downward.

[0009] Preferably, a retreat groove is provided on the side wall of the connection box on which the dust cleaning rotating plate is installed, and the dust cleaning rotating plate can be retracted into the retreat groove by rotation.

[0010] Preferably, the top of the inner wall of the retreat groove is provided with a baffle extending downward and into the connection box.

[0011] Preferably, the side walls of the retreat groove are arranged to be inclined downward.

[0012] Preferably, the limiting column is provided with reinforcing ribs connected to the cleaning rotating plate, the limiting column on the cleaning rotating plate with the movable end rotating upward is inclined downward, the limiting column on the other cleaning rotating plate is inclined upward, and the reinforcing ribs thereon are provided with downward inclined surfaces.

[0013] Preferably, the limiting mechanism includes a plurality of limiting holes arranged on the supporting rotating plate, the connecting box is provided with positioning holes corresponding to the limiting holes, and the limiting mechanism also includes bolts or limiting pins for limiting the limiting holes and the positioning holes.

[0014] Preferably, the length of the second cleaning bar is shorter than that of the first cleaning bar.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, by setting up a supporting component, the connection between the outlet main pipe and the inlet main pipe and the external pipeline can be released, and the restriction of the limit mechanism on the support rotating plate can be released by rotating the support rotating plate through the handle. After the support rotating plate is rotated one hundred and eighty degrees, the positions of the bottom fin heat exchange steel pipe and the top fin heat exchange steel pipe are interchanged, so that the top fin heat exchange steel pipe is prevented from working under extremely harsh working conditions for a long time, thereby ensuring the service life of the fin heat exchange steel pipe, reducing the probability of damage to the top fin heat exchange steel pipe, and ensuring the stability of the economizer.

[0016] By setting a cleaning component, during the rotation of the supporting rotating plate, the limit bending rod first squeezes the limit column and makes the cleaning rotating plate stick to the side wall of the connecting box until the limit bending rod and the limit column are misaligned and separated. In this state, the movable ends of the cleaning rotating plates on both sides are deflected to the side away from the connecting box under the elastic force of the spring sheet until the first cleaning bar and the second cleaning bar contact the light pipe and the fin of the fin heat exchange steel pipe respectively. When the first cleaning bar contacts the light pipe position of the fin heat exchange steel pipe, an impact force will be generated, which can vibrate the fin exchange steel pipe The hot steel pipe promotes the dust accumulation on the fin heat exchange steel pipe to fall off. As the fin heat exchange steel pipe in contact with the first cleaning strip moves relative to the first cleaning strip, several convex strips on the first cleaning strip will contact and separate from the light tube position of the fin heat exchange steel pipe, causing the first cleaning strip to vibrate frequently under the elastic support of the spring sheet, further promoting the dust accumulation on the fin heat exchange steel pipe to fall off. In this process, the convex strips can also further improve the cleaning efficiency of the light tube position of the fin heat exchange steel pipe and the side where adjacent fins are close to each other by scraping.

[0017] By setting up a cleaning component, as the supporting rotating plate rotates, the first cleaning strip can contact with different fin heat exchange steel tubes located on the outer circle in turn and perform cleaning work under the elastic support of the spring sheet, while the accumulated dust on the inner fin heat exchange steel tubes is removed by vibration. Furthermore, the second cleaning strip contacts with the outer side of the fin and the friction generated by mutual movement removes the accumulated dust attached to the outer side of the fin, thereby further improving the cleaning efficiency of the fin heat exchange steel tube.

[0018] The scraping work is performed on the outside of the fin through the notch at the cleaning slot, which further improves the cleaning efficiency of the fin heat exchange steel tube. The structure is simple and ingenious, and the consumables required for manufacturing the second cleaning strip are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of a boiler steel tube economizer; Figure 2 Schematic diagram of the three-dimensional structure of the boiler steel tube economizer with the front wall removed; Figure 3 This is a schematic diagram of the three-dimensional structure of a boiler steel tube economizer after removing the outer shell and ash cleaning components; Figure 4 This is a schematic diagram of the three-dimensional structure after the housing and the dust cleaning components are assembled; Figure 5 It is a schematic diagram of the three-dimensional structure of the supporting component; Figure 6 for Figure 4 Enlarged structural diagram at A in the middle.

[0021] [Reference Signs] 1. Shell; 2. Support components; 3. Heat exchange components; 4. Cleaning components; 5. Top bucket; 6. Connection box; 7. Bottom bucket; 8. Support turn plate; 9. Fin heat exchange steel pipe; 10. Connecting elbow; 11. Water outlet main pipe; 12. Water inlet main pipe; 13. Handle; 14. Limit hole; 15. Retreat groove; 16. Limit bending rod; 17. Cleaning turn plate; 18. First cleaning strip; 19. Second cleaning strip; 20. Limit column; 21. Raised strip; 22. Cleaning slot; 23. Reinforcement rib; 24. Ash passing slot; 25. Shrapnel; 26. Baffle.

[0022] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0023] The following is a detailed description of a boiler steel tube economizer provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0024] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0025] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0026] like Figure 1-Figure 3 As shown, an embodiment of the present invention provides a boiler steel tube economizer, comprising a shell 1 connected to a boiler tail flue (not shown in the figure), support components 2 are rotatably provided on opposite sides of the shell 1, and a heat exchange component 3 penetrating the shell 1 is installed on the support component 2; the shell 1 comprises a top bucket 5, a connection box 6 and a bottom bucket 7 connected in sequence, and circular openings are provided on opposite sides of the connection box 6; the support component 2 comprises two support rotating plates 8 rotatably connected to the two circular openings respectively, a plurality of handles 13 are installed on the support rotating plate 8, a plurality of limit holes 14 are provided on the support rotating plate 8, and the support rotating plate 8 is provided with a plurality of limit holes 14. A limiting mechanism for limiting the rotation of the support rotating plate 8 is installed on it; the heat exchange component 3 includes a plurality of fin heat exchange steel pipes 9 and connecting elbows 10 installed on the two support rotating plates 8 and connected in an S-shaped structure, the two ends of the fin heat exchange steel pipe 9 respectively pass through the two support rotating plates 8, and the connecting elbows 10 are located on the side where the two support rotating plates 8 are away from each other. The plurality of connected fin heat exchange steel pipes 9 and connecting elbows 10 are connected through the water outlet main pipe 11 and the water inlet main pipe 12. The water outlet main pipe 11 and the water inlet main pipe 12 are connected to the external pipeline, and the water outlet main pipe 11 and the water inlet main pipe 12 are installed outside the connection box 6.

[0027] After the device has been working for a long time, the connection between the outlet water main pipe 11 and the inlet water main pipe 12 and the external pipeline can be released, and the restriction of the support rotating plate 8 by the limiting mechanism can be released. Then, the support rotating plate 8 can be rotated by the handle 13. After the support rotating plate 8 is rotated one hundred and eighty degrees, the positions of the bottom fin heat exchange steel pipe 9 and the top fin heat exchange steel pipe 9 are interchanged, so as to avoid the top fin heat exchange steel pipe 9 working under extremely harsh working conditions for a long time, thereby ensuring the service life of the fin heat exchange steel pipe 9, reducing the probability of damage to the top fin heat exchange steel pipe 9, and ensuring the stability of the economizer.

[0028] Furthermore, the water outlet main pipe 11 and the water inlet main pipe 12 can also be connected to the external pipeline through a hose. The advantage of this arrangement is that the support rotating plate 8 can be directly rotated when the limiting mechanism is released, without releasing the connection between the water outlet main pipe 11 and the water inlet main pipe 12 and the external pipeline, thereby reducing the difficulty of operation and increasing the replacement speed of the top fin heat exchange steel pipe 9 and the bottom fin heat exchange steel pipe 9.

[0029] like Figure 2 , Figure 5 and Figure 6As shown, in this embodiment, a dust cleaning component 4 is also installed in the connecting box 6, and the dust cleaning component 4 includes two dust cleaning rotating plates 17 rotatably connected to the other two opposite sides of the connecting box 6, one of which can be rotated upward and the other can be rotated downward, and the two dust cleaning rotating plates 17 can rotate under the resistance of the fin heat exchange steel tube 9, and the movable ends of the two dust cleaning rotating plates 17 are normally oriented in the tangential direction of the rotation direction of the heat exchange component 3. The advantage of this arrangement is that the movable ends of the dust cleaning rotating plates 17 are prevented from being inserted into the fin heat exchange steel tube group of the heat exchange component 3 after rotation, thereby affecting the rotation of the heat exchange component 3. Furthermore, the two dust cleaning rotating plates 17 can be arranged at a lower position, for example, the rotating shaft of the fin heat exchange steel tube 9 is arranged at the same level as the two ends of the bottom of the fin heat exchange steel tube group. The advantage of this arrangement is that the cleaned dust has a greater probability of falling directly through the bottom hopper 7, reducing the probability of dust falling on other fin heat exchange steel tubes 9, improving the cleaning effect, and the dust cleaning rotating plates 1 The movable end of the cleaning plate 17 is provided with a plurality of second cleaning strips 19 corresponding to the position and width of the fins on the fin heat exchange steel tube 9, and the second cleaning strips 19 have elastic deformation capability. The movable end of the cleaning plate 17 is also provided with a plurality of first cleaning strips 18 arranged at intervals with the second cleaning strips 19, and the width of the first cleaning strips 18 is adapted to the gap size between two adjacent fins on the fin heat exchange steel tube 9. The two cleaning plates 17 are centrally symmetrically arranged, and a plurality of springs are installed on the two cleaning plates 17. 25, the side of the spring piece 25 away from the cleaning rotary plate 17 is connected to the inner wall of the connecting box 6, a limiting bent rod 16 is installed on the side of the two supporting rotary plates 8 close to each other, limiting columns 20 are installed on the two cleaning rotary plates 17, and a plurality of convex strips 21 are installed on the side of the first cleaning strip 18 away from the inner wall of the connecting box 6; when the heat exchange component 3 is in working state, the two limiting bent rods 16 respectively abut against the two limiting columns 20, so that the two limiting columns 20 tend to be parallel to the inner wall of the connecting box 6 but not close to it.

[0030] During the rotation of the supporting rotating plate 8, the limiting bent rod 16 first squeezes the limiting column 20 and makes the cleaning rotating plate 17 close to the side wall of the connecting box 6 until the limiting bent rod 16 and the limiting column 20 are misaligned and separated. In this state, the movable ends of the cleaning rotating plates 17 on both sides are deflected to the side away from the connecting box 6 under the elastic force of the spring sheet 25 until the first cleaning strip 18 and the second cleaning strip 19 contact the light tube and fin of the fin heat exchange steel tube 9 respectively. When the first cleaning strip 18 contacts the light tube position of the fin heat exchange steel tube 9, an impact force is generated, which can vibrate the fin heat exchange steel tube 9. Tube 9, promote the dust accumulation on the fin heat exchange steel tube 9 to fall off. Further, as the fin heat exchange steel tube 9 in contact with the first cleaning strip 18 moves relative to the first cleaning strip 18, several convex strips 21 on the first cleaning strip 18 will contact and separate from the light tube position of the fin heat exchange steel tube 9, so that the first cleaning strip 18 will vibrate frequently under the elastic support of the spring piece 25, further promoting the dust accumulation on the fin heat exchange steel tube 9 to fall off. In this process, the convex strips 21 can also further improve the cleaning efficiency of the light tube position of the fin heat exchange steel tube 9 and the side where adjacent fins are close to each other by scraping.

[0031] As the supporting rotating plate 8 rotates, the first cleaning strip 18 can contact and clean different fin heat exchange steel tubes 9 located in the outer circle in turn under the elastic support of the spring 25, while the accumulated dust on the inner fin heat exchange steel tubes 9 is removed by vibration. Furthermore, the second cleaning strip 19 contacts with the outer side of the fin and the friction generated by mutual movement removes the accumulated dust attached to the outer side of the fin, thereby further improving the cleaning efficiency of the fin heat exchange steel tube 9.

[0032] like Figure 5 As shown, in this embodiment, a plurality of cleaning grooves 22 are provided on the second cleaning strip 19, and adjacent cleaning grooves 22 are staggered and respectively pass through both sides of the second cleaning strip 19. The advantage of such an arrangement is that scraping work can be performed on the outside of the fin through the notches at the positions of the cleaning grooves 22, thereby further improving the cleaning efficiency of the fin heat exchange steel tube 9, and the structure is simple and ingenious, reducing the consumables required for manufacturing the second cleaning strip 19.

[0033] like Figure 5 As shown, in the present embodiment, a dust passing groove 24 which penetrates the cleaning turn plate 17 is provided at a position near the rotation center of the downwardly rotating movable end of the cleaning turn plate 17. The advantage of such a configuration is that dust falling on the cleaning turn plate 17 during the cleaning process can move downward along the inclined surface of the cleaning turn plate 17 and fall through the dust passing groove 24, thereby preventing dust from gathering at the rotation center of the cleaning turn plate 17 and corroding the cleaning turn plate 17 under the action of a long time, thereby ensuring the service life of the cleaning turn plate 17.

[0034] like Figure 4As shown, in the present embodiment, a retreat groove 15 is provided on the side wall of the connection box 6 on which the cleaning turn plate 17 is installed, and the cleaning turn plate 17 can be retracted into the retreat groove 15 by rotation. The advantage of such a setting is that more sufficient space is reserved for the spring clip 25, which is convenient for the contraction and folding of the spring clip 25 when the economizer is in the working state, and avoids excessive contraction and folding affecting the normal use of the spring clip 25.

[0035] like Figure 6 As shown, in this embodiment, the top of the inner wall of the retreat groove 15 is provided with a baffle 26 extending downward and into the connecting box 6. The advantage of this arrangement is that during the operation of the economizer, the smoke can be guided by the baffle 26 away from the cleaning rotary plate 17, thereby reducing the dust accumulation on the cleaning rotary plate 17 and ensuring the service life of the cleaning rotary plate 17.

[0036] like Figure 4 As shown, in this embodiment, the side walls of the retreat groove 15 are arranged to be inclined downward to prevent dust accumulation on the inner wall of the retreat groove 15 and corrosion of the connection box 6, thereby ensuring the service life of the connection box 6.

[0037] like Figure 5 and Figure 6 As shown, in the present embodiment, a reinforcing rib 23 connected to the dust cleaning rotary plate 17 is installed on the limiting column 20, and the limiting column 20 on the dust cleaning rotary plate 17 whose movable end rotates upward is tilted downward. Such a setting can effectively reduce the dust accumulation on the limiting column 20, reduce the corrosion of the limiting column 20 caused by the dust accumulation, and ensure the structural strength of the limiting column 20. The limiting column 20 on another dust cleaning rotary plate 17 is tilted upward, and the reinforcing rib 23 thereon is provided with a downward inclined surface. The advantage of such a setting is that dust can slide down along the reinforcing rib 23, reducing the probability of dust gathering on the limiting column 20, reducing the corrosion of the limiting column 20 caused by the dust accumulation, and ensuring the structural strength of the limiting column 20.

[0038] like Figure 3 As shown, in the present embodiment, the limiting mechanism includes a plurality of limiting holes 14 arranged on the supporting rotating plate 8, and a positioning hole corresponding to the limiting hole 14 is opened on the connecting box 6. The limiting mechanism also includes bolts (not shown in the figure) or limiting pins (not shown in the figure) for limiting the limiting holes 14 and the positioning holes. The limiting of the supporting rotating plate 8 can be released by removing the bolts or the limiting pins, thereby operating the supporting rotating plate 8 to rotate. Furthermore, an external gear ring can be provided on the supporting rotating plate 8, and a motor can be installed on the outside of one side of the connecting box 6. The motor drives the gear ring to rotate or stop through the gear, thereby controlling the rotation or stop of the supporting rotating plate 8, thereby further improving the operating efficiency of the supporting rotating plate 8.

[0039] like Figure 5As shown, in this embodiment, the length of the second cleaning strip 19 is shorter than that of the first cleaning strip 18. This arrangement makes the first cleaning strip 18 and the second cleaning strip 19 more compatible with the shape of the fin heat exchange steel tube 9, and effectively reduces the manufacturing consumables of the second cleaning strip 19 and reduces the manufacturing cost of the second cleaning strip 19.

[0040] The technical solution provided by the present invention can release the connection between the outlet main pipe 11 and the inlet main pipe 12 and the external pipeline after the device has been working for a long time, and release the restriction of the limit mechanism on the support rotating plate 8, and then rotate the support rotating plate 8 by the handle 13. After the support rotating plate 8 is rotated one hundred and eighty degrees, the positions of the bottom fin heat exchange steel pipe 9 and the top fin heat exchange steel pipe 9 are interchanged, so as to avoid the top fin heat exchange steel pipe 9 from working under extremely harsh working conditions for a long time, thereby ensuring the service life of the fin heat exchange steel pipe 9, reducing the probability of damage to the top fin heat exchange steel pipe 9, and ensuring the stability of the economizer. At the same time, after the exchange, the wind direction of the smoke in contact with the fin heat exchange steel pipe 9 is opposite to the wind direction when dust is accumulated on the fin heat exchange steel pipe 9. By utilizing this feature, part of the dust accumulated on the fin heat exchange steel pipe 9 can be scraped off by the wind force of the smoke, thereby ensuring the heat exchange efficiency of the fin heat exchange steel pipe 9.

[0041] During the rotation of the supporting rotating plate 8, the limiting bent rod 16 first squeezes the limiting column 20 and makes the cleaning rotating plate 17 close to the side wall of the connecting box 6 until the limiting bent rod 16 and the limiting column 20 are misaligned and separated. In this state, the movable ends of the cleaning rotating plates 17 on both sides are deflected to the side away from the connecting box 6 under the elastic force of the spring sheet 25 until the first cleaning strip 18 and the second cleaning strip 19 contact the light tube and fin of the fin heat exchange steel tube 9 respectively. When the first cleaning strip 18 contacts the light tube position of the fin heat exchange steel tube 9, an impact force is generated, which can vibrate the fin heat exchange steel tube 9. Tube 9, promote the dust accumulation on the fin heat exchange steel tube 9 to fall off. Further, as the fin heat exchange steel tube 9 in contact with the first cleaning strip 18 moves relative to the first cleaning strip 18, several convex strips 21 on the first cleaning strip 18 will contact and separate from the light tube position of the fin heat exchange steel tube 9, so that the first cleaning strip 18 will vibrate frequently under the elastic support of the spring piece 25, further promoting the dust accumulation on the fin heat exchange steel tube 9 to fall off. In this process, the convex strips 21 can also further improve the cleaning efficiency of the light tube position of the fin heat exchange steel tube 9 and the side where adjacent fins are close to each other by scraping.

[0042] As the supporting rotating plate 8 rotates, the first cleaning strip 18 can contact and clean different fin heat exchange steel tubes 9 located in the outer circle in turn under the elastic support of the spring 25, while the accumulated dust on the inner fin heat exchange steel tubes 9 is removed by vibration. Furthermore, the second cleaning strip 19 contacts with the outer side of the fin and the friction generated by mutual movement removes the accumulated dust attached to the outer side of the fin, thereby further improving the cleaning efficiency of the fin heat exchange steel tube 9.

[0043] The scraping work is performed on the outside of the fin through the notch at the position of the cleaning groove 22, so as to further improve the cleaning efficiency of the fin heat exchange steel tube 9, and the structure is simple and ingenious, which reduces the consumables required for manufacturing the second cleaning strip 19.

[0044] The present invention encompasses any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A boiler steel tube economizer, characterized in that: include: A shell (1) connected to the flue at the rear of the boiler, support components (2) being rotatably arranged on opposite sides of the shell (1), and a heat exchange component (3) penetrating the shell (1) being mounted on the support component (2); The housing (1) comprises a top bucket (5), a connection box (6) and a bottom bucket (7) which are connected in sequence, and circular openings are provided on opposite sides of the connection box (6); The support component (2) comprises two support rotating plates (8) rotatably connected to the two circular openings respectively, a plurality of handles (13) are mounted on the support rotating plates (8), a plurality of limiting holes (14) are arranged on the support rotating plates (8), and a limiting mechanism for limiting the rotation of the support rotating plates (8) is mounted on the support rotating plates (8); The heat exchange component (3) comprises a plurality of fin heat exchange steel pipes (9) and connecting elbows (10) which are connected in an S-shaped structure and are installed on the two supporting rotating plates (8). The two ends of the fin heat exchange steel pipe (9) respectively penetrate the two supporting rotating plates (8). The connecting elbows (10) are located on the side of the two supporting rotating plates (8) that are away from each other. The plurality of connected fin heat exchange steel pipes (9) and connecting elbows (10) are connected to each other through a water outlet main pipe (11) and a water inlet main pipe (12). The water outlet main pipe (11) and the water inlet main pipe (12) are installed outside the connection box (6).

2. The boiler steel tube economizer according to claim 1, characterized in that: A cleaning component (4) is also installed in the connection box (6), and the cleaning component (4) includes two cleaning rotating plates (17) rotatably connected to the other two opposite sides of the connection box (6), one of the cleaning rotating plates (17) can rotate upward, and the other cleaning rotating plate (17) can rotate downward, and both cleaning rotating plates (17) can rotate under the resistance of the fin heat exchange steel pipe (9), and the movable ends of the two cleaning rotating plates (17) are normally oriented in the tangential direction of the rotation direction of the heat exchange component (3), and the movable ends of the cleaning rotating plates (17) are installed with a plurality of second cleaning strips (19) corresponding to the position and width of the fins on the fin heat exchange steel pipe (9), and the second cleaning strips (19) have elastic deformation capability. The movable end of the support plate (17) is also provided with a plurality of first cleaning strips (18) arranged at intervals with the second cleaning strips (19), the width of the first cleaning strips (18) being adapted to the size of the gap between two adjacent fins on the fin heat exchange steel tube (9), the two cleaning rotating plates (17) being arranged symmetrically with respect to the center, the two cleaning rotating plates (17) being provided with a plurality of spring pieces (25), the side of the spring pieces (25) away from the cleaning rotating plates (17) being connected to the inner wall of the connection box (6), the sides of the two supporting rotating plates (8) being close to each other being provided with a limit bending rod (16), the two cleaning rotating plates (17) being provided with a limit column (20), and the side of the first cleaning strip (18) away from the inner wall of the connection box (6) being provided with a plurality of convex strips (21); When the heat exchange component (3) is in a working state, the two limit bending rods (16) respectively abut against the two limit pillars (20), so that the two limit pillars (20) tend to be parallel to but not close to the inner wall of the connection box (6).

3. The boiler steel tube economizer according to claim 2, characterized in that: The second cleaning strip (19) is provided with a plurality of cleaning slots (22), and adjacent cleaning slots (22) are arranged in a staggered manner and respectively pass through two sides of the second cleaning strip (19).

4. The boiler steel tube economizer according to claim 2, characterized in that: The ash cleaning rotating plate (17) whose movable end rotates downward is provided with an ash passing slot (24) penetrating the ash cleaning rotating plate (17) at a position close to the rotation center.

5. The boiler steel tube economizer according to claim 1, characterized in that: A retreat groove (15) is provided on the side wall of the connection box (6) on which the dust cleaning rotating plate (17) is installed, and the dust cleaning rotating plate (17) can be retracted into the retreat groove (15) by rotating.

6. The boiler steel tube economizer according to claim 5, characterized in that: The top of the inner wall of the retreat groove (15) is provided with a baffle (26) extending downward and into the connection box (6).

7. The boiler steel tube economizer according to claim 5, characterized in that: The side walls of the retreat groove (15) are arranged to be inclined downward.

8. The boiler steel tube economizer according to claim 2, characterized in that: The limiting column (20) is provided with a reinforcing rib (23) connected to the cleaning rotating plate (17); the limiting column (20) on the cleaning rotating plate (17) with the movable end rotating upward is tilted downward; the limiting column (20) on the other cleaning rotating plate (17) is tilted upward, and the reinforcing rib (23) thereon is provided with a downwardly tilted inclined surface.

9. The boiler steel tube economizer according to claim 1, characterized in that: The limiting mechanism comprises a plurality of limiting holes (14) arranged on the supporting rotating plate (8), the connection box (6) is provided with positioning holes corresponding to the limiting holes (14), and the limiting mechanism further comprises bolts or limiting pins for limiting the limiting holes (14) and the positioning holes.

10. The boiler steel tube economizer according to claim 2, characterized in that: The length of the second cleaning strip (19) is shorter than the length of the first cleaning strip (18).

Images