CN217818292U - Air preheater capable of preventing blockage by using air leakage - Google Patents
Air preheater capable of preventing blockage by using air leakage Download PDFInfo
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- CN217818292U CN217818292U CN202221990738.3U CN202221990738U CN217818292U CN 217818292 U CN217818292 U CN 217818292U CN 202221990738 U CN202221990738 U CN 202221990738U CN 217818292 U CN217818292 U CN 217818292U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model discloses a belong to air heater and leak out to administer and prevent stifled grey technical field, specifically be an utilize to take out air leakage and prevent air heater who blocks up, including the rotor, establish at the flue gas hot junction side sector plate in rotor hot junction, establish at the primary air/overgrate air side cold junction sector plate of rotor cold junction and establish the female pipe of hot overgrate air outside the rotor, still include: a filter assembly for avoiding the inflow of impurities in the leakage air to the heat storage element, further comprising: prevent stifled grey bellows, prevent stifled grey bellows and establish at the rotor cold junction, and adjacent with once wind/overgrate air side cold junction sector plate, prevent stifled grey bellows's roof upper surface with the upper surface of once wind/overgrate air side cold junction sector plate flushes, the utility model discloses a filter assembly filters the impurity in to the air leakage, has the phenomenon of the impurity of avoiding taking place in the air leakage and depends on the heat accumulation component, depends on the heat accumulation component through the impurity of avoiding in the air leakage, has further improvement and prevents stifled grey effect.
Description
Technical Field
The utility model relates to an air heater leaks out and administers and prevent stifled grey technical field, specifically is an utilize to take out air leakage and prevent stifled air heater who blocks up.
Background
A rotary air preheater (referred to as "air preheater") is a heat exchange device for large utility boilers, which uses the heat of boiler flue gas to heat the air required for combustion, thereby increasing the efficiency of the boiler.
The air preheater achieves continuous heat absorption of air and continuous heat release of flue gas by means of continuous rotation of rotors carrying heat storage elements, all of which are typically carried in 36 or 48 rotor compartments, i.e. each rotor compartment is typically in the shape of a sector of 10 ° or 7.5 °. Radial sealing pieces are arranged on the rotor bin grids in the radial direction and are matched with the sector plate of the air preheater to form a sealing pair, so that leakage of air to smoke is reduced.
The main focus of concern for air preheaters includes ash blockage, high air leakage rate, low heat transfer efficiency, severe low temperature corrosion, etc., which have long affected the safe and economic operation of air preheaters and the entire boiler system.
The above problems have been known for a long time, and they are mutually promoted and influenced. In recent years, with the widespread operation of denitration systems, the operation environment of the air preheater is changed, and the problem of ash blockage is particularly prominent, and the treatment is difficult and complicated.
At present, flue gas denitration facilities additionally arranged in a coal-fired power plant mainly adopt a Selective Catalytic Reduction (SCR) technology. After the SCR denitration process is adopted, part of SO2 in the flue gas is oxidized into SO3 by the denitration catalyst, the volume concentration of the SO3 in the flue gas is increased, and in addition, an inevitable ammonia escape phenomenon exists, SO that a large amount of byproducts such as ammonium bisulfate (NH 4HSO 4) and the like are generated, the acid dew point temperature of the flue gas is increased, and the low-temperature corrosion is aggravated.
The by-product ammonium bisulfate (NH 4HSO 4) is molten at the temperature of 146-207 ℃, and can be firmly adhered to the surface of a heat storage element of the air preheater, so that the heat storage element is corroded and deposited with dust, and finally, the dust is easily blocked, thereby causing great hidden danger to the safe operation of a unit. The load limiting of the unit is caused by the fact that part of domestic existing power plants cannot solve or relieve the problem, and even the power plants are forced to stop.
When the exhaust gas temperature is lower than the acid dew point, the sulfuric acid vapor is condensed, and sulfuric acid droplets are attached to the cold-end heat storage element to corrode the heat storage element. The acid dew point of the flue gas increases with the increase of the SO3 concentration, and generally reaches 130-160 ℃. Because the denitration system increases the conversion rate of SO2 to SO3, namely the concentration of SO3 in the flue gas is increased, and in order to control the power generation cost of a power plant, the sulfur content of actual coal is generally higher than that of designed coal, SO that the acid dew point of the power plant is higher than the smoke exhaust temperature at present, the low-temperature corrosion (acid dew point corrosion) is aggravated, and the ash blockage problem is quite prominent.
When the rotary air preheater operates, the rotor continuously rotates, the upper surface of the rotor is continuously heated by high-temperature flue gas at the hot air side, and the temperature is higher; the lower surface of the rotor is continuously cooled by primary and secondary cold air at the cold air side, and the temperature is lower. This causes the upper portion of the rotor to expand more than the lower portion, and this moment causes the rotor to turn downward and outward from the lower portion, which in addition to the self-gravity moment of the rotor, accelerates this "mushroom-like" thermal deformation of the rotor. In this "mushroom" thermal deformation, the outer periphery of the air preheater rotor sinks downward, while the center of the rotor bulges. This results in the lower triangular air leakage gap and the circumferential axial air leakage gap of the rotor becoming smaller in the hot state than in the cold state, and the upper air leakage gap becoming larger in the cold state. And along with the increase of boiler load and the increase of the heat exchange quantity of the air preheater rotor, the mushroom-shaped deformation is more obvious, and the variation of air leakage gaps at each position is larger. Therefore, the air leakage mainly occurs at the hot end, namely the upper part, of the air preheater, the hot air after preheating leaks from the upper sector plate, a large amount of hot air leaks directly to reduce the combustion efficiency of the boiler, the power consumption of the fan is increased, and the deformation is increased along with the increase of the load of the boiler, wherein the air leakage at the sector plate at the side end of the flue gas becomes the main air leakage source of the air preheater.
The existing Chinese patent CN208652614U discloses an air preheater which utilizes air leakage to prevent blockage, although the patent collects the air leakage at a hot end sector plate as an air source of an anti-blockage ash system by utilizing the air leakage to prevent the blockage of the air preheater, the air leakage problem of the air preheater can be further treated while the ash blockage problem of the air preheater is solved, the ash blockage preventing effect is good, the air leakage rate of the preheater is reduced, the influence on the smoke exhaust temperature is small, and the engineering implementation difficulty is low. However, when the air preheater works, impurities in the leaked air cannot be filtered, so that the impurities still adhere to the heat storage element when the heat storage element is blown and swept by the leaked air, and therefore the air preheater is invented and prevented from being blocked by the sucked and leaked air.
SUMMERY OF THE UTILITY MODEL
In view of above-mentioned and/or current one kind utilize to take out the problem that exists among the air heater that leaks wind and prevent stifled, provided the utility model discloses.
Therefore, the utility model aims at providing an utilize air heater that leaks out and prevent stifled can solve the above-mentioned current problem of proposing.
For solving the technical problem, according to the utility model discloses an aspect, the utility model provides a following technical scheme:
the utility model provides an utilize air heater who leaks out and prevent stifled, its includes the rotor, establish the flue gas hot junction side sector plate at the rotor hot junction, establish the primary air/overgrate air side cold junction sector plate at the rotor cold junction and establish the female pipe of hot overgrate air outside the rotor, still include:
and the filtering component is used for preventing impurities in the leaked air from flowing into the heat storage element.
As an air heater's an optimal selection scheme who prevents stifled that utilizes to take out hourglass wind, wherein: further comprising:
the ash blocking prevention air box is arranged at the cold end of the rotor and is adjacent to the primary air/secondary air side cold end fan-shaped plate, and the upper surface of a top plate of the ash blocking prevention air box is flush with the upper surface of the primary air/secondary air side cold end fan-shaped plate;
the anti-blocking ash air box air injection port is arranged on the top plate of the anti-blocking ash air box;
the air leakage inlet is arranged in the middle of the fan-shaped plate at the hot end side of the flue gas;
the main pipe is communicated with the hot secondary air main pipe at one end, the other end of the main pipe is divided into a first branch and a second branch, the first branch is communicated with the air leakage inlet, the second branch is communicated with the ash blockage preventing air box, and the filter assembly is arranged on the second branch;
the hot secondary air branch door is arranged on the main pipe in front of the branch;
the air leakage extraction isolation door is arranged on the first branch path;
and the leakage air suction fan is arranged on the second branch.
As an air heater's an optimal selection scheme who prevents stifled that utilizes to take out hourglass wind, wherein: prevent stifled grey bellows and be fan-shaped box structure, prevent that the central angle of stifled grey bellows is greater than a rotor compartment check angle and is less than two rotor compartment check angles.
As an air heater's an optimal selection scheme who prevents stifled that utilizes to take out hourglass wind, wherein: the anti-blocking ash air box air injection port is fan-shaped, and the central angle of the anti-blocking ash air box air injection port is 1.5-4 degrees.
As an air heater's an optimal selection scheme who prevents stifled that utilizes to take out hourglass wind, wherein: the top plate of the anti-blocking ash air box is attached to the primary air/secondary air side cold end fan-shaped plate, and the upper surface of the top plate of the anti-blocking ash air box and the radial sealing piece of the air preheater form sealing.
As an air heater's an optimal selection scheme who prevents stifled that utilizes to take out hourglass wind, wherein: the air-leakage inlet is arranged along the radial direction of the fan-shaped plate at the hot end side of the flue gas and is in a fan shape, and the central angle of the air-leakage inlet is 2-8 degrees.
As an air heater's an optimal selection scheme who prevents stifled that utilizes to take out hourglass wind, wherein: the filter assembly includes:
the hollow pipe is arranged on the second branch;
the inner wall of the hollow pipe is fixedly provided with a supporting plate;
the filter screen is fixedly arranged on the inner wall of the supporting plate;
the fixing plates are fixedly arranged at two ends of the hollow pipe;
the cleaning component is used for preventing the filter screen from being blocked and is arranged on the inner wall of the hollow pipe;
a drive assembly for operating the sweeping assembly.
As an air heater's an optimal selection scheme who prevents stifled that utilizes to take out hourglass wind, wherein: the sweeping assembly comprises:
the inner walls of two ends of the hollow pipe are fixedly provided with supporting rods;
the supporting blocks are fixedly arranged between the two groups of supporting rods;
the rotating shaft is rotatably connected to the supporting block through a bearing;
the rotating block is fixedly arranged on the bottom of the rotating shaft;
the cross bar is fixedly arranged on one side of the rotating block;
the brush silk, the bottom of horizontal pole is equipped with a plurality of brush silks, and the brush silk contacts with the filter screen.
As an air heater's an optimal selection scheme who prevents stifled that utilizes to take out hourglass wind, wherein: the driving component is as follows:
the transmission shaft is fixedly connected with the rotating shaft;
the windmill blades are fixedly arranged on the transmission shaft.
As an air heater's an optimal selection scheme who prevents stifled that utilizes to take out hourglass wind, wherein: the driving component is as follows:
the box body is fixedly arranged on one side of the supporting block;
the servo motor is fixedly installed on the inner wall of the box body, and an output shaft of the servo motor is fixedly connected with the rotating shaft.
Compared with the prior art:
1. the filter assembly is used for filtering the impurities in the leaked air, so that the phenomenon that the impurities in the leaked air are attached to the heat storage element can be avoided, and the ash blockage prevention effect can be further improved by preventing the impurities in the leaked air from being attached to the heat storage element;
2. make through drive assembly and clean the subassembly and move, have the phenomenon of avoiding the filter screen to take place to block up, take place to block up through avoiding the filter screen, have the work efficiency who avoids filter assembly and receive the influence.
Drawings
FIG. 1 is a system diagram of the present invention;
FIG. 2 is a structural view of a sector plate of the air preheater of the present invention;
FIG. 3 is a schematic view of the installation position and structure of the ash blocking prevention bellows of the present invention;
fig. 4 is a schematic front view of the structure of embodiment 1 of the present invention;
fig. 5 is a schematic front view of the structure of embodiment 2 of the present invention.
In the figure: the device comprises a flue gas hot end side fan-shaped plate 10, an air leakage sucking inlet 11, a primary air/secondary air side cold end fan-shaped plate 20, an anti-blocking ash air box fan-shaped plate 30, an anti-blocking ash air box 31, an anti-blocking ash air box air injection opening 32, a hot secondary air main pipe 40, a hot secondary air branch door 41, an air leakage sucking isolation door 42, an air leakage sucking fan 43, a filter assembly 50, a hollow pipe 51, a support plate 52, a filter screen 53, a fixing plate 54, a cleaning assembly 55, a support rod 551, a support block 552, a rotating shaft 553, a rotating block 554, a cross rod 555, a brush wire 556, a driving assembly 56, a transmission shaft 561, a windmill blade 562, a box 566 and a servo motor 567.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Example 1:
the utility model provides an utilize air heater who takes out air leakage and prevent stifled please refer to fig. 1-4, including the rotor, establish flue gas hot junction side sector plate 10 in the rotor hot junction, establish the primary air/overgrate air side cold junction sector plate 20 in the rotor cold junction and establish the female pipe 40 of hot overgrate air outside the rotor.
Further comprising: the system comprises an anti-blocking ash air box 31, an anti-blocking ash air box air injection port 32, an air leakage suction inlet 11, a main pipe, a hot secondary air branch door 41, an air leakage suction isolation door 42 and an air leakage suction fan 43;
an anti-blocking ash air box 31 is arranged at the cold end of the rotor and is adjacent to a primary air/secondary air side cold end fan-shaped plate 20, the upper surface of a top plate of the anti-blocking ash air box 31 is flush with the upper surface of the primary air/secondary air side cold end fan-shaped plate 20, an anti-blocking ash air box air injection port 32 is arranged on the top plate of the anti-blocking ash air box 31, a leakage air inlet 11 is arranged at the middle position of a flue gas hot end side fan-shaped plate 10, one end of a main pipe is communicated with a hot secondary air main pipe 40, the other end of the main pipe is divided into a first branch and a second branch, the first branch is communicated with the leakage air inlet 11, the second branch is communicated with the anti-blocking ash air box 31, a filter component 50 is arranged on the second branch, a hot secondary air branch door 41 is arranged on the main pipe before branching, and a leakage air exhaust isolation door 42 is arranged on the first branch, the air-leakage-preventing fan 43 is arranged on the second branch path, the anti-blocking ash bellows 31 is of a fan-shaped box structure, the top plate of the anti-blocking ash bellows 31 is an anti-blocking ash bellows fan-shaped plate 30, the central angle of the anti-blocking ash bellows 31 is larger than the angle of one rotor bin grid and smaller than the angle of two rotor bins, the shape of the anti-blocking ash bellows air-jet 32 is set to be fan-shaped, the central angle of the anti-blocking ash bellows air-jet 32 is 1.5-4 degrees, the top plate of the anti-blocking ash bellows 31 and the primary air/secondary air side cold-end fan-shaped plate 20 are attached to each other, the upper surface of the top plate of the anti-blocking ash bellows 31 and the radial sealing sheet of the air preheater form sealing, the air-leakage inlet 11 is arranged along the radial direction of the flue gas hot end side fan-shaped plate 10, the air-leakage-inlet 11 is fan-shaped, and the central angle of the air-leakage-inlet 11 is 2-8 degrees.
The above structure is the prior art, and is not described in detail herein, and its theory of operation is: when the air preheater has ash blockage risk, opening the air-leakage isolating door 42, extracting air leakage from the air-leakage inlet 11 of the smoke hot-end side fan-shaped plate 10 by the air-leakage fan 43, boosting the air and then sending the air to the anti-blocking ash air box 31 at the cold end, when the load of the unit is low and the extracted air leakage is insufficient, opening the hot secondary air branch door 41 to supplement hot secondary air to the anti-blocking ash air box 31, in the operation mode, extracting the air leakage and/or hot secondary air at about 300 ℃, spraying out from the air-spraying opening of the cold-end anti-blocking ash air box fan-shaped plate 30 to form high-temperature and high-flow-velocity jet gas, upwards blowing the heat storage element, and establishing a local high-temperature and high-flow-velocity area in the rotor of the air preheater to loosen the acid ash deposited on the surface of the heat storage element, so as to carry and remove the acid ash under the action of high flow velocity; because the air preheater rotor rotates continuously, the heat storage element is completely swept once every rotation, and the phenomenon that the accumulated dust is aggravated to cause dust blockage is avoided.
Further comprising:
a filter assembly 50 for preventing impurities in the leakage air from flowing into the heat storage member.
The filter assembly 50 includes: the cleaning device comprises a hollow pipe 51, a supporting plate 52, a filter screen 53, a fixing plate 54, a cleaning assembly 55 for preventing the filter screen 53 from being blocked, and a driving assembly 56 for operating the cleaning assembly 55;
the hollow pipe 51 is arranged on the second branch, the supporting plate 52 is fixedly arranged on the inner wall of the hollow pipe 51, the filter screen 53 is fixedly arranged on the inner wall of the supporting plate 52, the fixing plates 54 are fixedly arranged at the two ends of the hollow pipe 51, and the cleaning assembly 55 is arranged on the inner wall of the hollow pipe 51.
the equal fixed mounting bracing piece 551 of both ends inner wall of hollow tube 51, supporting shoe 552 fixed mounting are between two sets of bracing pieces 551, and pivot 553 passes through the bearing and rotates to be connected on supporting shoe 552, and rotatory piece 554 fixed mounting is on the bottom of pivot 553, and horizontal pole 555 fixed mounting is on one side of rotatory piece 554, and the bottom of horizontal pole 555 is equipped with a plurality of brush silk 556, and the brush silk 556 contacts with filter screen 53.
The drive assembly 56 is: a transmission shaft 561, windmill blades 562;
the transmission shaft 561 is fixedly connected to the rotation shaft 553, and the windmill blades 562 are fixedly mounted on the transmission shaft 561.
The working principle is as follows: when the hourglass flows into in hollow tube 51, then can filter impurity wherein under filter screen 53's effect, in order to avoid taking place the phenomenon that the impurity in the hourglass depends on the heat accumulation element, meanwhile, when the hourglass flows into hollow tube 51, the hourglass then can blow to windmill blade 562, so that windmill blade 562 drives pivot 553 on the transmission shaft 561 and rotates, when pivot 553 is rotatory, then can drive horizontal pole 555 and rotate, in order to realize clearing up the impurity on the filter screen 53 through brush silk 556, in order to avoid filter screen 53 to take place the condition of jam.
Example 2:
the utility model provides an utilize air heater who leaks out and prevent stifled please refer to figure 5, drive assembly 56 is: a case 566, a servo motor 567;
the box 566 is fixedly installed on one side of the supporting block 552, the servo motor 567 is fixedly installed on the inner wall of the box 566, and the output shaft of the servo motor 567 is fixedly connected with the rotating shaft 553.
The working principle is as follows: when the hourglass flows into in the hollow tube 51, then can filter impurity wherein under the effect of filter screen 53, in order to avoid taking place the phenomenon that the impurity in the hourglass depends on the heat accumulation element, meanwhile, when the hourglass flows into in the hollow tube 51, make pivot 553 rotate through servo motor 567, when pivot 553 is rotatory, then can drive horizontal pole 555 and rotate, in order to realize clearing up the impurity on the filter screen 53 through brush silk 556, in order to avoid the filter screen 53 to take place the condition of jam.
While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the non-exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The utility model provides an utilize air heater who leaks out and prevent stifled, includes the rotor, establishes flue gas hot junction side sector plate (10) at the rotor hot junction, establishes primary air/overgrate air side cold junction sector plate (20) at the rotor cold junction and establishes female pipe (40) of hot overgrate air outside the rotor, its characterized in that still includes:
a filter assembly (50) for preventing impurities in the leakage air from flowing into the heat storage element.
2. The air preheater with the function of preventing the blockage by pumping the leakage air according to claim 1, is characterized by further comprising:
the anti-blocking ash air box (31) is arranged at the cold end of the rotor and is adjacent to the primary air/secondary air side cold end fan-shaped plate (20), and the upper surface of a top plate of the anti-blocking ash air box (31) is flush with the upper surface of the primary air/secondary air side cold end fan-shaped plate (20);
the ash blockage preventing air injection port (32) of the ash blockage preventing air box is arranged on the top plate of the ash blockage preventing air box (31);
the air leakage inlet (11) is arranged at the middle position of the smoke hot end side fan-shaped plate (10);
one end of the main pipe is communicated with the hot secondary air main pipe (40), the other end of the main pipe is divided into a first branch and a second branch, the first branch is communicated with the air leakage inlet (11), the second branch is communicated with the ash blockage preventing air box (31), and the filter assembly (50) is arranged on the second branch;
the hot secondary air branch door (41), the hot secondary air branch door (41) is arranged on the main pipe before branching;
the air leakage extraction isolation door (42), wherein the air leakage extraction isolation door (42) is arranged on the first branch;
and the leakage air suction fan (43) is arranged on the second branch path.
3. The air preheater with the function of preventing the blockage by pumping the air leakage according to claim 2, wherein the ash blockage preventing air box (31) is of a fan-shaped box structure, and the central angle of the ash blockage preventing air box (31) is larger than one rotor bin angle and smaller than two rotor bin angles.
4. The air preheater with the function of preventing the blockage by pumping the leakage air according to claim 2, wherein the shape of the ash blocking prevention windbox air injection port (32) is a sector, and the central angle of the ash blocking prevention windbox air injection port (32) is 1.5-4 °.
5. The air preheater with the function of preventing the blockage by pumping the air leakage as claimed in claim 2, wherein the top plate of the ash blocking prevention air box (31) is attached to the primary air/secondary air side cold end sector plate (20), and the upper surface of the top plate of the ash blocking prevention air box (31) forms a seal with a radial sealing sheet of the air preheater.
6. The air preheater with the function of preventing blockage by pumping the air leakage as claimed in claim 2, wherein the air pumping inlet (11) is arranged along the radial direction of the fan-shaped plate (10) at the hot end side of the flue gas, the air pumping inlet (11) is fan-shaped, and the central angle of the air pumping inlet (11) is 2-8 degrees.
7. An air preheater with blow-by blockage prevention according to claim 2, wherein said filter assembly (50) comprises:
the hollow pipe (51), the said hollow pipe (51) is set up on the second branch;
the inner wall of the hollow pipe (51) is fixedly provided with the supporting plate (52);
the filter screen (53), the said filter screen (53) is fixedly mounted on inboard wall of the shoe plate (52);
the fixing plate (54) is fixedly arranged at both ends of the hollow pipe (51);
the cleaning assembly (55) is used for preventing the filter screen (53) from being blocked, and the cleaning assembly (55) is arranged on the inner wall of the hollow pipe (51);
a drive assembly (56) for operating the sweeping assembly (55).
8. An air preheater with blow-by blockage prevention according to claim 7, characterized in that said sweeping assembly (55) comprises:
the inner walls of two ends of the hollow pipe (51) are fixedly provided with the support rods (551);
the supporting block (552), the said supporting block (552) is fixedly mounted between two groups of support bars (551);
the rotating shaft (553), the rotating shaft (553) is rotatably connected to the supporting block (552) through a bearing;
the rotating block (554) is fixedly arranged on the bottom of the rotating shaft (553);
a cross bar (555), the cross bar (555) being fixedly mounted on one side of the rotation block (554);
the bottom of the cross rod (555) is provided with a plurality of brush filaments (556), and the brush filaments (556) are in contact with the filter screen (53).
9. An air preheater for preventing blockage by means of air leakage according to claim 8, wherein said drive assembly (56) is:
the transmission shaft (561) is fixedly connected with the rotating shaft (553);
the windmill blades (562) are fixedly arranged on the transmission shaft (561).
10. An air preheater utilizing leakage air extraction to prevent clogging as claimed in claim 8, wherein said drive assembly (56) is:
a case (566), the case (566) being fixedly installed on one side of the supporting block (552);
and the servo motor (567), wherein the servo motor (567) is fixedly arranged on the inner wall of the box body (566), and the output shaft of the servo motor (567) is fixedly connected with the rotating shaft (553).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221990738.3U CN217818292U (en) | 2022-07-30 | 2022-07-30 | Air preheater capable of preventing blockage by using air leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221990738.3U CN217818292U (en) | 2022-07-30 | 2022-07-30 | Air preheater capable of preventing blockage by using air leakage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217818292U true CN217818292U (en) | 2022-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221990738.3U Active CN217818292U (en) | 2022-07-30 | 2022-07-30 | Air preheater capable of preventing blockage by using air leakage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217818292U (en) |
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2022
- 2022-07-30 CN CN202221990738.3U patent/CN217818292U/en active Active
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