CN220828867U - Heat exchange gas flow control mechanism and air preheater - Google Patents
Heat exchange gas flow control mechanism and air preheater Download PDFInfo
- Publication number
- CN220828867U CN220828867U CN202322245720.1U CN202322245720U CN220828867U CN 220828867 U CN220828867 U CN 220828867U CN 202322245720 U CN202322245720 U CN 202322245720U CN 220828867 U CN220828867 U CN 220828867U
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- air inlet
- inlet channel
- air
- heat exchange
- control mechanism
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Links
- 239000007789 gas Substances 0.000 claims description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 9
- 239000003546 flue gas Substances 0.000 claims description 9
- 210000001624 hip Anatomy 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 239000004071 soot Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- Air Supply (AREA)
Abstract
The utility model provides a heat exchange gas flow control mechanism which comprises an air inlet channel, a wedge-shaped guide plate and a driving motor, wherein the cross section of the air inlet channel is isosceles trapezoid, a horizontal rotating shaft is arranged on the wedge-shaped guide plate, two ends of the horizontal rotating shaft are respectively arranged at the top center of the narrow end side wall and the top center of the wide end side wall of the air inlet channel, the tip end of the wedge-shaped guide plate is provided with an inclined sharp edge, the driving motor is arranged at the outer side of the air inlet channel, the driving motor drives the horizontal rotating shaft to rotate, and when the wedge-shaped guide plate rotates to be in a horizontal state, the inclined sharp edge is parallel to and close to the side waist of the air inlet channel; the utility model also provides an air preheater. The heat exchange gas flow control mechanism and the air preheater have the advantages of scientific design, simpler structure, good matching degree with the shape of the fan-shaped bin and on-line adjustment and distribution of air quantity.
Description
Technical Field
The utility model relates to heat exchange equipment, in particular to a heat exchange gas flow control mechanism and an air preheater.
Background
The rotary air preheater is one common air preheater, and is used in coal burning power station boiler to preheat the air before entering the boiler with the waste heat of tail fume. The rotary air preheater is divided into a fan cover rotary type air preheater and a heating surface rotary type air preheater, wherein a rotor of the heating surface rotary type air preheater is divided into a plurality of fan-shaped cabins by a plurality of partition boards, heat exchange elements are arranged in the fan-shaped cabins, a flue gas channel is communicated with a flue gas side of a shell, a secondary air channel and a primary air channel are respectively communicated with an air side of the shell, the rotor slowly rotates when the air preheater works, heat carried by the flue gas can be absorbed by the heat exchange elements after the flue gas passes through the flue gas side of the air preheater, and then the heat is slowly rotated to the air side, and is transferred to air before entering a boiler.
In the use, the flue gas can condense into liquid condensate at lower temperature, if fan-shaped cabin indoor temperature is lower, the condensate will deposit wherein, and then leads to the accumulation dust on bin inner wall and the heat exchange element, finally makes the wind channel obstructed, and heat exchange efficiency reduces, just needs to clear up and maintain it, and the method of current clearance is through the external equipment provides the pressure gas and carries out soot blowing, but its needs only can operate after equipment is shut down, and not only clearance cost is higher, influences work efficiency moreover.
The patent 202220634026.1 discloses a variable-diameter induced draft device for an air preheater with adjustable air quantity, which is characterized in that two baffles are arranged in an air flow channel, the baffles divide the air flow channel into an inner side channel and an outer side channel, the two channels can be simultaneously opened or the inner side channel and the outer side channel are independently opened through the rotation of the two baffles, and when the inner side channel and the outer side channel are independently opened, the air quantity and the air speed in a single channel are increased, so that the online soot blowing operation can be carried out; however, since the inner side of the fan-shaped bin is narrow and the outer side of the fan-shaped bin is wide, the two baffles normally rotate and the two side plates are required to be parallel, the cross section of the channel must be rectangular, the two baffles are not matched at the joint, the air quantity of the inner side and the air quantity of the outer side are not easy to be distributed evenly, and the structural design is complex.
In order to solve the above problems, an ideal technical solution is always sought.
Disclosure of Invention
The utility model aims at overcoming the defects of the prior art, and provides a heat exchange gas flow control mechanism and an air preheater which are scientific in design, simpler in structure, good in matching degree with the shape of a fan-shaped bin and capable of adjusting and distributing air quantity on line.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a gaseous flow control mechanism of heat transfer, includes air inlet channel, wedge guide plate and driving motor, air inlet channel's transversal isosceles trapezoid that personally submits, be provided with a horizontal pivot on the wedge guide plate, the both ends of horizontal pivot are installed respectively air inlet channel's narrow end lateral wall top central authorities and wide end lateral wall top central authorities, the pointed end of wedge guide plate is provided with the slope pointed edge, driving motor installs air inlet channel outside, driving motor drives horizontal pivot rotates, works as the wedge guide plate rotates to the horizontality, the slope pointed edge with air inlet channel's side waist is parallel and is close to together.
Based on the above, two side waist inner walls of the air inlet channel are respectively provided with limiting blocks corresponding to the wedge-shaped guide plates, and each limiting block is in the same horizontal plane with the horizontal rotating shaft.
Based on the above, the cross section of the wedge-shaped guide plate is triangular, and the included angle at the inclined sharp edge is 7-12 degrees.
The utility model also provides an air preheater, which comprises a cylindrical shell, a rotor rotatably arranged in the cylindrical shell and the heat exchange gas flow control mechanism, wherein the cylindrical shell is divided into an air side and a flue gas side, the air inlet channel is communicated with the air inlet end of the air side of the cylindrical shell, the side wall of the narrow end of the air inlet channel is close to the center of the rotor, and the side wall of the wide end of the air inlet channel is close to the outer wall of the cylindrical shell.
Based on the above, the air inlet channel is used as a secondary air channel of the air preheater.
Compared with the prior art, the utility model has the substantial characteristics and progress, in particular, the cross section of the air inlet channel is designed into the isosceles trapezoid, and the air inlet channel is more attached to the sector in shape, so that the matching performance is better when the air inlet channel is in butt joint with the sector bin, meanwhile, the wedge-shaped guide plate is radially arranged, the air inlet channel can be evenly divided into a left sub channel and a right sub channel, the opening size of the two sub channels can be adjusted through the rotation of the wedge-shaped guide plate, the air inflow on two sides can be further distributed, when the wedge-shaped guide plate rotates to the horizontal position, one sub channel can be basically and completely blocked, the air quantity and the air speed in the other sub channel are both the maximum, and along with the rotation of the rotor, the utility model has the advantages of scientific design, simpler structure, good matching degree with the sector bin shape, and online air quantity adjustment and distribution.
Further, the limiting block can limit the rotation angle of the wedge-shaped guide plate, so that the inclined sharp edge is prevented from rotating to the upper side, and the rotation of the rotor is prevented from being interfered; the cross section of the wedge-shaped guide plate is triangular, and all three surfaces can play a certain guide role on air.
Drawings
Fig. 1 is a schematic diagram showing the structure of the heat exchange gas flow rate control mechanism in embodiment 1 in one state.
Fig. 2 is a schematic view of the heat exchange gas flow rate control mechanism in embodiment 1 in another state.
Fig. 3 is a schematic view of the structure of the wedge-shaped baffle in embodiment 1.
FIG. 4 is a schematic view showing the structure of a hollow pre-reactor in example 2.
In the figure: 1. an air inlet channel; 2. wedge-shaped guide plates; 3. a driving motor; 4. a horizontal rotating shaft; 5. inclined sharp edges; 6. a limiting block; 7. a cylindrical housing; 8. a rotor; 11. a narrow end sidewall; 12. a wide end sidewall; 13. a side waist.
Description of the embodiments
The technical scheme of the utility model is further described in detail through the following specific embodiments.
Examples
As shown in fig. 1-3, the heat exchange gas flow control mechanism comprises an air inlet channel 1, a wedge-shaped guide plate 2 and a driving motor 3, wherein the cross section of the air inlet channel 1 is isosceles trapezoid, a horizontal rotating shaft 4 is arranged on the wedge-shaped guide plate 2, two ends of the horizontal rotating shaft 4 are respectively arranged at the top center of a narrow end side wall 11 and the top center of a wide end side wall 12 of the air inlet channel 1, the tip of the wedge-shaped guide plate 2 is provided with an inclined sharp edge 5, the cross section of the wedge-shaped guide plate 2 is particularly triangular, the included angle at the inclined sharp edge 5 is 7-12 degrees, and the air flow shape in the center can be blocked due to overlarge included angle; the driving motor 3 is installed outside the air inlet channel 1, the driving motor 3 drives the horizontal rotating shaft 4 to rotate, and when the wedge-shaped guide plate 2 rotates to be in a horizontal state, the inclined sharp edges 5 are parallel to and close to the side waists 13 of the air inlet channel 1.
Working principle:
The cross-section of air inlet channel 1 sets up to isosceles trapezoid, more laminating in the shape with fan-shaped, so its matchability is better when interfacing with fan-shaped bin, simultaneously, wedge guide plate 2 radial installation can be with two sub-channels about the average segmentation of air inlet channel 1, through the rotation of wedge guide plate 2, can adjust the opening size of two sub-channels, and then distribute the air input of both sides, when wedge guide plate 2 rotates to horizontal position, can also be with one of them sub-channel shutoff basically completely, and the amount of wind and the wind speed in another sub-channel all reach the biggest, along with the rotation of rotor, realize online soot blowing operation.
In order to ensure the running safety of the rotor, limiting blocks 6 are respectively arranged on the inner walls of the two side waists 13 of the air inlet channel 1 corresponding to the wedge-shaped guide plates 2, and each limiting block 6 and the horizontal rotating shaft 4 are in the same horizontal plane; when the rotor is used, the limiting block 6 can limit the inclined sharp edges 5 to rotate to be in a horizontal state at most, so that the interference of the rotation of the rotor is avoided.
Examples
As shown in fig. 4, an air preheater comprises a cylindrical housing 7, a rotor 8 rotatably arranged in the cylindrical housing 7, and a heat exchange gas flow control mechanism in embodiment 1, wherein the cylindrical housing 7 is divided into an air side and a flue gas side, the air inlet channel 1 is communicated with an air inlet end of the air side of the cylindrical housing 7, a narrow end side wall 11 of the air inlet channel 1 is arranged near the center of the rotor 8, and a wide end side wall 12 of the air inlet channel 1 is arranged near the outer wall of the cylindrical housing 7; when the device is used, the butt joint matching between the air inlet channel 1 and the fan-shaped bin in the rotor 8 is better, the air inlet amount and the air speed at two sides can be adjusted by rotating the wedge-shaped guide plate 2, and the online soot blowing operation is realized along with the rotation of the rotor 8. Preferably, the air inlet channel 1 is used as a secondary air channel of the air preheater, the fan-shaped angle of the secondary air channel is smaller, the shape of the air inlet channel 1 is closer to the fan shape, and the matching degree is better.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present utility model and are not limiting; while the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present utility model or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the utility model, it is intended to cover the scope of the utility model as claimed.
Claims (5)
1. A heat exchange gas flow control mechanism, characterized in that: including air inlet channel, wedge guide plate and driving motor, air inlet channel's transversal isosceles trapezoid that personally submits, be provided with a horizontal pivot on the wedge guide plate, the both ends of horizontal pivot are installed respectively air inlet channel's narrow end lateral wall top central authorities and wide end lateral wall top central authorities, the pointed end of wedge guide plate is provided with the slope pointed edge, driving motor installs air inlet channel outside, driving motor drives horizontal pivot rotates, works as the wedge guide plate rotates to the horizontality, the slope pointed edge with air inlet channel's side waist is parallel and press close to together.
2. The heat exchange gas flow control mechanism of claim 1, wherein: limiting blocks are respectively arranged on the two side waist inner walls of the air inlet channel corresponding to the wedge-shaped guide plates, and each limiting block is in the same horizontal plane with the horizontal rotating shaft.
3. The heat exchange gas flow control mechanism of claim 2, wherein: the cross section of the wedge-shaped guide plate is triangular, and the included angle at the inclined sharp edge is 7-12 degrees.
4. The utility model provides an air preheater, is in including tubular housing and rotation setting the rotor in the tubular housing, the tubular housing is divided into air side and flue gas side, its characterized in that: the heat exchange gas flow control mechanism comprises a cylindrical shell, a rotor, a heat exchange gas flow control mechanism and a heat exchange gas flow control mechanism, wherein the heat exchange gas flow control mechanism is characterized in that the air inlet channel is communicated with an air inlet end of the air side of the cylindrical shell, a narrow end side wall of the air inlet channel is arranged close to the center of the rotor, and a wide end side wall of the air inlet channel is arranged close to the outer wall of the cylindrical shell.
5. The air preheater according to claim 4, wherein: the air inlet channel is used as a secondary air channel of the air preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322245720.1U CN220828867U (en) | 2023-08-21 | 2023-08-21 | Heat exchange gas flow control mechanism and air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322245720.1U CN220828867U (en) | 2023-08-21 | 2023-08-21 | Heat exchange gas flow control mechanism and air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220828867U true CN220828867U (en) | 2024-04-23 |
Family
ID=90726985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322245720.1U Active CN220828867U (en) | 2023-08-21 | 2023-08-21 | Heat exchange gas flow control mechanism and air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220828867U (en) |
-
2023
- 2023-08-21 CN CN202322245720.1U patent/CN220828867U/en active Active
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