Rotary air preheater hot air purging anti-blocking device

Abstract

The utility model relates to a rotary air preheater, especially a rotary air preheater hot -blast sweeping anti -blocking device, including the shell, the below fixedly connected with filter mechanism in the shell inside, the front side fixedly connected with the air inlet pipe of filter mechanism, the middle fixedly connected with the fixed plate in the shell inside, the inside fixedly connected with the fan of fixed plate, the top swing connection has the air outlet pipe of shell front side. The utility model discloses a setting air outlet pipe can adjust the air -out direction of air outlet, through starting the adjusting motor, makes the shaft drive cylinder rotate to change the exhaust direction of air outlet, makes hot -blast contact with the liquid ammonium bisulfate everywhere on heat exchange element, prevents the ammonium bisulfate in the dead angle of heat exchange element from gasification discharge due to the air -out direction of hot -blast fixed.

Description

Technical Field

[0001] This utility model relates to a rotary air preheater, and more particularly to a rotary air preheater hot air purging anti-clogging device. Background Technology

[0002] Rotary air preheaters are important thermal energy devices, playing a crucial role in large-scale thermal systems such as power plant boilers. They utilize heat exchange between air and flue gas to preheat cold air to a certain temperature, thereby improving boiler combustion efficiency. With increasingly stringent environmental regulations, power plant boilers in thermal power plants are typically equipped with denitrification devices. Denitrification in power plant boilers generally uses ammonia as a catalyst. To improve denitrification efficiency, excessive ammonia injection is often employed. However, the escaped ammonia reacts chemically with sulfuric acid in the flue gas to form ammonium bisulfate. Ammonium bisulfate is liquid in the range of 146 to 207°C. This liquid ammonium bisulfate attracts dust, forming blockages that adhere to the heat exchange elements of the rotary air preheater, causing blockages. To prevent this, a hot air purging anti-blockage device is used to raise the metal wall temperature of the heat exchange elements, allowing the ammonium bisulfate to transition from a liquid to a gaseous state. Gaseous ammonium bisulfate has no effect on the air preheater, thus preventing blockages.

[0003] The existing rotary air preheater hot air purging anti-clogging devices generally have fixed air outlets, and the air outlet direction is relatively singular during use. This results in the dead corners of the heat exchange elements not being able to fully contact the hot air, thus preventing the liquid ammonium bisulfate in the dead corners from being converted into a gaseous state, resulting in poor anti-clogging effect. Summary of the Invention

[0004] The purpose of this invention is to provide a rotary air preheater hot air purging anti-clogging device that facilitates adjustment of the air outlet direction, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A rotary air preheater hot air purging anti-clogging device is provided, comprising a housing, a filter mechanism fixedly connected to the lower part of the housing, an air inlet pipe fixedly connected to the front side of the filter mechanism, a fixing plate fixedly connected to the middle of the housing, a fan fixedly connected inside the fixing plate, an air outlet movably connected to the upper front side of the housing, the air outlet movably connected to the upper front side of the housing, the air outlet movably connected to an adjusting motor fixedly connected to the upper front side of the housing, a rotating shaft fixedly connected to the output end of the adjusting motor, a cylinder fixedly connected to the outer side of the rotating shaft, a through hole opened inside the cylinder, an air outlet opened at the upper inside of the cylinder, and rotating plates fixedly connected to both sides of the cylinder.

[0006] Optionally, the outer casing includes a housing, with a sealing plate fixedly connected to both sides of the upper inner side of the housing, a first sealing strip fixedly connected to the inner side of the sealing plate, and a second sealing strip fixedly connected to both the front and rear sides of the inner side of the housing.

[0007] Optionally, the air inlet pipe includes a pipe body fixedly connected to the front side of the filter mechanism, and an insulation sleeve is fixedly connected to the outside of the pipe body.

[0008] Optionally, the filtration mechanism includes a fixed shell fixedly connected to the lower part of the housing, an electric telescopic rod fixedly connected to the left side inside the fixed shell, a scraper fixedly connected to the inner end of the electric telescopic rod, a filter plate fixedly connected to the top of the fixed shell, pressure cylinders fixedly connected to both the top and bottom of the fixed shell, a pressure column movably connected inside the pressure cylinder, a spring fixedly connected between the pressure cylinder and the pressure column, and a sealing gasket fixedly connected to the side of the pressure column away from the pressure cylinder.

[0009] Optionally, the fan includes a fixed sleeve fixedly connected inside the fixed plate, a fixed column fixedly connected to the inner side of the fixed sleeve, a rotating motor fixedly connected to the inner side of the fixed column, a fan blade fixedly connected to the output end of the rotating motor, and a heating wire fixedly connected to the upper part of the inner side of the fixed sleeve.

[0010] Optionally, the fixing plate includes a plate body fixedly connected to the middle of the inside of the housing, the plate body having a fixing groove inside, and a protective plate fixedly connected to the lower part of the plate body.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This invention, by setting up an air outlet duct, can adjust the air outlet direction. Activating the adjusting motor causes the rotating shaft to drive the duct body to rotate. This rotation changes the orientation of the air outlet, thus altering the direction of the hot air discharge. Adjusting the air outlet direction ensures that the hot air can fully contact the liquid ammonium bisulfate at various points on the heat exchange element. Furthermore, when the duct body rotates, the rotating plate can rotate around the rotating shaft between the sealing plates. Under the action of the first and second sealing strips, the rotating plate maintains a tight seal with the shell and sealing plates while rotating. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1This is a cross-sectional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 3 This is a cross-sectional structural diagram of the outer shell and fixing plate of this utility model;

[0017] Figure 4 This is a cross-sectional structural diagram of the filtration mechanism of this utility model;

[0018] Figure 5 This is a schematic diagram of the overall structure of the fan of this utility model;

[0019] Figure 6 This is a cross-sectional structural diagram of the air outlet duct of this utility model.

[0020] In the diagram: 1. Outer shell; 101. Shell; 102. Sealing plate; 103. First sealing strip; 104. Second sealing strip; 2. Air inlet pipe; 201. Pipe body; 202. Insulation sleeve; 3. Filtering mechanism; 301. Fixed shell; 302. Electric telescopic rod; 303. Filter plate; 304. Pressure cylinder; 305. Spring; 306. Pressure column; 307. Sealing gasket; 308. Scraper column; 4. Fan; 401. Fixed sleeve; 402. Fixed column; 403. Fan blade; 404. Heating wire; 405. Rotating motor; 5. Fixed plate; 501. Plate body; 502. Fixed groove; 503. Protective plate; 6. Air outlet; 601. Adjusting motor; 602. Cylinder body; 603. Rotating shaft; 604. Rotating plate; 605. Through hole; 606. Air outlet. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0023] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] Reference Figures 1 to 6 The present invention will now be described. A rotary air preheater hot air purging anti-clogging device includes a housing 1. A filter mechanism 3 is fixedly connected to the lower part of the housing 1. An air inlet pipe 2 is fixedly connected to the front side of the filter mechanism 3. A fixing plate 5 is fixedly connected to the middle of the housing 1. A fan 4 is fixedly connected inside the fixing plate 5. An air outlet duct 6 is movably connected to the upper front side of the housing 1. The air outlet duct 6 includes an adjusting motor 601 fixedly connected to the upper front side of the housing 1. A rotating shaft 603 is fixedly connected to the output end of the adjusting motor 601. A cylinder 602 is fixedly connected to the outer side of the rotating shaft 603. A through hole 605 is opened inside the cylinder 602. An air outlet 606 is opened at the upper inside the cylinder 602. The through hole 605 and the air outlet 606 are connected. The upper part of the through hole 605 and the lower part of the rotating plate 604 are on the same arc surface. When the air blows from below to the rotating plate 604, it will flow along the arc surface of the rotating plate 604 to the through hole 605, ensuring that the air can be discharged more smoothly. Rotating plates 604 are fixedly connected to both sides of 602. In use, this utility model is installed below the cold end heat exchange element, and the end of the air inlet pipe 2 away from the outer shell 1 is connected to the hot air pipe of the air preheater. By starting the regulating motor 601, the rotating shaft 603 drives the cylinder 602 to rotate. The rotation of the cylinder 602 changes the orientation of the air outlet 606, thereby changing the direction of the hot air discharge. By adjusting the direction of the air discharge, the hot air can come into contact with the liquid ammonium bisulfate at various points on the heat exchange element, preventing the ammonium bisulfate in the dead corner of the heat exchange element from being unable to vaporize and be discharged due to the fixed direction of the hot air discharge. When the cylinder 602 rotates, the rotating plates 604 can rotate between the sealing plates 102 with the rotating shaft 603 as the axis. Under the action of the first sealing strip 103 and the second sealing strip 104, the rotating plates 604 can maintain the sealing between the outer shell 101 and the sealing plates 102 while rotating.

[0026] Furthermore, the outer casing 1 includes a housing 101. Both sides of the upper inner side of the housing 101 are fixedly connected to a sealing plate 102. The distance between the upper and lower sealing plates 102 is adapted to the thickness of the rotating plate 604, so that the rotating plate 604 can rotate between the sealing plates 102 with the rotating shaft 603 as the axis. A first sealing strip 103 is fixedly connected to the inner side of the sealing plate 102. A second sealing strip 104 is fixedly connected to the front and rear sides of the inner side of the housing 101. The first sealing strip 103 and the second sealing strip 104 are made of silicone rubber, which has high temperature resistance and can prevent damage from prolonged exposure to high temperature environments.

[0027] Furthermore, the air inlet pipe 2 includes a pipe body 201 fixedly connected to the front side of the filter mechanism 3. The end of the pipe body 201 away from the filter mechanism 3 is connected to the hot air pipe of the air preheater, so that some of the hot air in the air preheater can enter the outer shell 1 through the air inlet pipe 2, thereby reducing the energy loss caused by the heating wire 404 heating the air. An insulation sleeve 202 is fixedly connected to the outside of the pipe body 201. The insulation sleeve 202 is used to keep the hot air in the pipe body 201 warm.

[0028] Furthermore, the filtration mechanism 3 includes a fixed housing 301 fixedly connected to the lower part of the housing 101. An electric telescopic rod 302 is fixedly connected to the left side inside the fixed housing 301. A scraper 308 is fixedly connected to the inner end of the electric telescopic rod 302. A filter plate 303 is fixedly connected to the top of the fixed housing 301. The filter plate 303 is used to filter the air entering the air preheater. Pressure cylinders 304 are fixedly connected to both the top and bottom of the fixed housing 301. A pressure column 306 is movably connected inside the pressure cylinder 304. The pressure column 306 can be raised and lowered inside the pressure cylinder 304. A spring 305 is fixedly connected between the pressure cylinder 304 and the pressure column 306. A sealing gasket 307 is fixedly connected to the side of the pressure column 306 away from the pressure cylinder 304. The sealing gasket 307 is made of silicone rubber. By starting the fan 4, the hot air in the hot air duct of the air preheater enters the filter mechanism 3. The filter plate 303 filters the impurities in the hot air, and then the air enters the housing 101 through the protective plate 503 and is discharged through the air outlet 606.

[0029] Furthermore, the fan 4 includes a fixed sleeve 401 fixedly connected inside the fixed plate 5. A fixed column 402 is fixedly connected to the inner side of the fixed sleeve 401. A rotating motor 405 is fixedly connected to the inner side of the fixed column 402. A fan blade 403 is fixedly connected to the output end of the rotating motor 405. A heating wire 404 is fixedly connected to the upper inner side of the fixed sleeve 401. When the rotating motor 405 is started, the fan blade 403 rotates, causing the air in the lower part of the housing 101 to enter the upper part of the housing 101, creating a negative pressure state in the lower part of the housing 101. This causes the hot air in the hot air duct of the air preheater to enter the filter mechanism 3 through the air inlet pipe 2, and then through the protective plate 503 and the fan 4. By energizing the heating wire 404, the hot air passing through can be further heated, thereby increasing the temperature of the hot air discharged from the air outlet 606 so that the ammonium bisulfate can be rapidly vaporized after contacting the hot air.

[0030] Furthermore, the fixing plate 5 includes a plate body 501 fixedly connected to the middle of the inside of the housing 101. The inside of the plate body 501 is provided with a fixing groove 502 for fixing the fan 4. A protective plate 503 is fixedly connected to the lower part of the inside of the plate body 501. The inside of the protective plate 503 is provided with small holes for hot air to pass through and for protecting the fan 4 above. It further filters impurities in the hot air to prevent impurities from impacting the fan 4 and causing damage to the fan 4.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rotary air preheater hot air purging anti-clogging device, comprising a housing (1), characterized in that: A filter mechanism (3) is fixedly connected to the lower part of the inner shell (1). An air inlet pipe (2) is fixedly connected to the front side of the filter mechanism (3). A fixing plate (5) is fixedly connected to the middle of the inner shell (1). A fan (4) is fixedly connected inside the fixing plate (5). An air outlet duct (6) is movably connected to the upper front side of the outer shell (1). The air outlet duct (6) includes an adjusting motor (601) fixedly connected to the upper front side of the outer shell (1). A rotating shaft (603) is fixedly connected to the output end of the adjusting motor (601). A cylinder (602) is fixedly connected to the outer side of the rotating shaft (603). A through hole (605) is opened inside the cylinder (602). An air outlet (606) is opened at the upper inside the cylinder (602). Rotating plates (604) are fixedly connected to both sides of the cylinder (602).

2. The rotary air preheater hot air purging anti-clogging device as described in claim 1, characterized in that: The outer shell (1) includes a shell (101), and a sealing plate (102) is fixedly connected to both sides of the upper inner side of the shell (101). A first sealing strip (103) is fixedly connected to the inner side of the sealing plate (102), and a second sealing strip (104) is fixedly connected to both the front and rear sides inside the shell (101).

3. The rotary air preheater hot air purging anti-clogging device as described in claim 1, characterized in that: The air inlet pipe (2) includes a pipe body (201) fixedly connected to the front side of the filter mechanism (3), and an insulation sleeve (202) is fixedly connected to the outside of the pipe body (201).

4. The rotary air preheater hot air purging anti-clogging device as described in claim 1, characterized in that: The filtration mechanism (3) includes a fixed shell (301) fixedly connected to the lower part of the housing (101). An electric telescopic rod (302) is fixedly connected to the left side inside the fixed shell (301). A scraper (308) is fixedly connected to the inner end of the electric telescopic rod (302). A filter plate (303) is fixedly connected to the top of the fixed shell (301). A pressure cylinder (304) is fixedly connected to both the top and bottom of the fixed shell (301). A pressure column (306) is movably connected inside the pressure cylinder (304). A spring (305) is fixedly connected between the pressure cylinder (304) and the pressure column (306). A sealing gasket (307) is fixedly connected to the side of the pressure column (306) away from the pressure cylinder (304).

5. The rotary air preheater hot air purging anti-clogging device as described in claim 1, characterized in that: The fan (4) includes a fixed sleeve (401) fixedly connected inside the fixed plate (5). A fixed column (402) is fixedly connected to the inner side of the fixed sleeve (401). A rotating motor (405) is fixedly connected to the inner side of the fixed column (402). A fan blade (403) is fixedly connected to the output end of the rotating motor (405). A heating wire (404) is fixedly connected to the upper part of the inner side of the fixed sleeve (401).

6. The rotary air preheater hot air purging anti-clogging device as described in claim 1, characterized in that: The fixing plate (5) includes a plate body (501) fixedly connected to the middle of the inside of the housing (101). The inside of the plate body (501) is provided with a fixing groove (502), and a protective plate (503) is fixedly connected to the lower part of the inside of the plate body (501).

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