CN216047821U - Fan air heater of coal-fired boiler of thermal power plant - Google Patents
Fan air heater of coal-fired boiler of thermal power plant Download PDFInfo
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- CN216047821U CN216047821U CN202121653179.2U CN202121653179U CN216047821U CN 216047821 U CN216047821 U CN 216047821U CN 202121653179 U CN202121653179 U CN 202121653179U CN 216047821 U CN216047821 U CN 216047821U
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- heat exchange
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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
Abstract
The utility model belongs to the technical field of boiler equipment, and particularly relates to a fan heater of a coal-fired boiler of a thermal power plant. The heat exchanger comprises a shell frame and a tubular heat exchange assembly, wherein the shell frame is arranged between an outlet of a blower and an inlet of an air preheater, the tubular heat exchange assembly is arranged in the shell frame, the tubular heat exchange assembly comprises two groups of first heat exchange units and second heat exchange units which are arranged in an equivalent mode, the first heat exchange units and the second heat exchange units comprise air inlet connecting pipes and water drainage connecting pipes which are arranged transversely, and a plurality of groups of fin-shaped heat exchange pipes are vertically arranged between the air inlet connecting pipes and the water drainage connecting pipes; the air inlet connecting pipe extends out of the shell frame and is connected with an external steam pipeline through a flange, and the drain connecting pipe extends out of the shell frame and is connected with an external drain pipeline through a flange; the first heat exchange unit and the second heat exchange unit are movably connected with the shell frame through the suspension guide assembly. The utility model improves the heat exchange efficiency, is convenient to replace and maintain and saves the cost.
Description
Technical Field
The utility model belongs to the technical field of boiler equipment, and particularly relates to a fan heater of a coal-fired boiler of a thermal power plant.
Background
The fan air heater is mainly installed and arranged in an air duct at the inlet of a primary fan and an air feeder of a coal-fired boiler of a thermal power plant, and improves the air temperature at the inlet of the primary fan and the air feeder through steam heat exchange. A primary fan and a blower inlet air heater of a coal-fired boiler of a 2 x 300MW unit adopt a finned tube type single-chip heater in the original design, and the installation mode is fixed. The existing air heater has serious corrosion of heat transfer pipe bundle and serious thinning of pipe wall due to steam scouring, and one air heater leaks in 1-2 months always during 5 months of operation of the air heater in winter. Because the heat transfer tube bundles of the existing air heater are arranged closely, the repair space is narrow and the heat transfer tube bundles cannot be repaired or replaced, and only the heat transfer tube bundles can be cut off to block the tube openings, the heat exchange area of the air heater is reduced, the temperature difference of a cold section of the air preheater of the boiler is easy to be overlarge, the phenomena of deformation, jamming, sudden increase of current of a rotor of the air preheater, corrosion and blockage of low-temperature ammonium bisulfate and the like occur, and the safe and stable operation of the boiler is seriously influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a fan heater of a coal-fired boiler of a thermal power plant, which aims to solve the problems in the background technology.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a fan heater of a coal-fired boiler of a thermal power plant comprises a shell frame and a tubular heat exchange assembly, wherein the shell frame is installed between an outlet of a blower and an inlet of an air preheater, the tubular heat exchange assembly is installed inside the shell frame and comprises two groups of first heat exchange units and second heat exchange units which are arranged in an equivalent mode, the first heat exchange units and the second heat exchange units comprise air inlet connecting pipes and water drain connecting pipes which are arranged transversely, and a plurality of groups of fin-shaped heat exchange pipes are vertically arranged between the air inlet connecting pipes and the water drain connecting pipes; the air inlet connecting pipe extends out of the shell frame and is connected with an external steam pipeline through a flange, and the drain connecting pipe extends out of the shell frame and is connected with an external drain pipeline through a flange; the first heat exchange unit and the second heat exchange unit are movably connected with the shell frame through the suspension guide assembly.
Further, the suspension guide assembly comprises a first suspension guide unit connected with the air inlet union and a second suspension guide unit connected with the water drainage union.
Further, the first suspension guide unit comprises M-shaped slide rails arranged on two sides of the inner wall of the shell frame and a first guide plate arranged at the top of the air inlet union pipe; cylindrical sliding blocks matched with the M-shaped sliding rails are arranged on two sides of the bottom of the first guide plate; and a first reinforcing rib is arranged between the bottom of the M-shaped slide rail and the inner wall of the shell frame.
The second hanging guide unit further comprises a second guide plate arranged on the drainage connecting pipe and a limiting plate arranged above the second guide plate, and a second reinforcing rib is arranged between the limiting plate and the inner wall of the shell frame; the second guide plate is limited in a sliding groove formed by the limiting plate and the bottom of the shell frame, and can slide back and forth in the sliding groove.
Furthermore, the heat exchange tube is divided into an upper layer and a lower layer, and the heat exchange efficiency is improved compared with the traditional single-layer heat exchange tube.
Furthermore, a plurality of threaded holes for installing a sealing plate of the air heater are formed in the outer surfaces of the left side and the right side of the shell frame; prevent hot gas leakage and outside cold air entering, lead to heat exchange efficiency to descend.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model can realize that the air heater can be integrally drawn out in seasons without using the air heater, thereby effectively reducing the power consumption of the boiler fan, and the air heater is divided into two-piece (or multi-piece) arrangement, so that the single-side fan of the boiler can be directly drawn out for maintenance without stopping during fault maintenance, thereby effectively improving the reliability of boiler equipment in winter and the load capacity of a unit, reducing the maintenance cost and improving the maintenance efficiency.
Drawings
FIG. 1 is a top view of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is an enlarged view of portion A of the present invention;
FIG. 4 is an enlarged view of part B of the present invention;
in the figure, 1-a shell frame, 2-a first heat exchange unit, 3-a second heat exchange unit, 4-an air inlet connecting pipe, 5-a water drainage connecting pipe, 6-a fan heater sealing plate, 7-a threaded hole, 8-a heat exchange pipe, 9-a first guide plate, 10-M type slide rails, 11-a slide block, 12-a first reinforcing rib, 13-a second guide plate, 14-a limiting plate and 15-a second reinforcing rib.
Detailed Description
The utility model is further explained below with reference to the drawings and the detailed description.
As shown in fig. 1-4, a fan heater of a coal-fired boiler of a thermal power plant comprises a shell frame 1 and a tubular heat exchange assembly, wherein the shell frame 1 is installed between an outlet of a blower and an inlet of an air preheater, the tubular heat exchange assembly is installed inside the shell frame 1, the tubular heat exchange assembly comprises two groups of first heat exchange units 2 and second heat exchange units 3 which are arranged in an equivalent manner, the first heat exchange units 2 and the second heat exchange units 3 comprise air inlet connecting pipes 4 and water drain connecting pipes 5 which are arranged in a transverse manner, and a plurality of groups of fin-shaped heat exchange pipes 8 are vertically arranged between the air inlet connecting pipes 4 and the water drain connecting pipes 5; the air inlet connecting pipe 4 extends out of the shell frame 1 and is connected with an external steam pipeline through a flange, and the drain connecting pipe 5 extends out of the shell frame 1 and is connected with an external drain pipeline through a flange; the first heat exchange unit 2 and the second heat exchange unit 3 are movably connected with the shell frame 1 through a suspension guide assembly.
Specifically, the suspension guide assembly comprises a first suspension guide unit and a second suspension guide unit, wherein the first suspension guide unit comprises M-shaped slide rails 10 welded on two sides of the inner wall of the shell frame 1 and a first guide plate 9 welded on the top of the air inlet connecting pipe 4; the M-shaped sliding rail 10 is formed by welding two pieces of angle steel and a steel plate; cylindrical sliding blocks 11 matched with the M-shaped sliding rails 10 are welded on two sides of the bottom of the first guide plate 9, and reinforcing ribs can be welded between the sliding blocks 11 and the first guide plate 9 for reinforcing connection; a first reinforcing rib 12 is arranged between the bottom of the M-shaped slide rail 10 and the inner wall of the shell frame 1. The second suspension guide unit comprises a second guide plate 13 welded at the top of the drainage connecting pipe 5 and a limiting plate 14 arranged above the second guide plate 13, and a second reinforcing rib 15 is welded between the limiting plate 14 and the inner wall of the shell frame 1; the second guide plate 13 is restricted in the sliding groove formed by the limiting plate and the bottom of the housing frame, and can slide back and forth in the sliding groove.
Specifically, the heat exchange tube 8 is divided into an upper layer and a lower layer, and the heat exchange efficiency is improved compared with the traditional single-layer heat exchange tube.
Specifically, the outer surfaces of the left side and the right side of the shell frame 1 are provided with a plurality of threaded holes 7 for mounting a sealing plate 6 of the air heater; prevent hot gas leakage and outside cold air entering, lead to heat exchange efficiency to descend.
When the air heater is used in cold seasons, the first heat exchange unit and the second heat exchange unit are inserted into the shell frame along the slide rail on the inner side of the shell frame in a bilateral symmetry mode, and meanwhile, the sealing plates of the air heater are installed on the left side and the right side of the shell frame through screws; in seasons without using the air heater, the first heat exchange unit and the second heat exchange unit can be drawn out from two sides, the resistance to wind is almost zero, and the loads of a primary air fan and a blower are greatly reduced; in addition, accessories such as a steam inlet valve and a drain valve of the air heater are arranged on the left side and the right side of the air heater body, and can be directly extracted for maintenance under the condition that a primary fan and a blower on one side of the boiler are not stopped; meanwhile, when the two heat exchange units operate in winter, if one heat exchange unit leaks, is extracted for maintenance, the other heat exchange unit can still continuously play a heat exchange role, and the unit has low output reduction amplitude and small load influence under the extreme environmental temperature.
Claims (6)
1. The utility model provides a coal fired boiler fan air heater of thermal power plant which characterized in that: the heat exchanger comprises a shell frame and a tubular heat exchange assembly, wherein the shell frame is installed between an outlet of a blower and an inlet of an air preheater, the tubular heat exchange assembly is installed inside the shell frame, the tubular heat exchange assembly comprises two groups of first heat exchange units and second heat exchange units which are arranged in an equivalent mode, the first heat exchange units and the second heat exchange units comprise air inlet connecting pipes and water drain connecting pipes which are arranged transversely, and a plurality of groups of fin-shaped heat exchange pipes are vertically arranged between the air inlet connecting pipes and the water drain connecting pipes; the air inlet connecting pipe extends out of the shell frame and is connected with an external steam pipeline through a flange, and the drain connecting pipe extends out of the shell frame and is connected with an external drain pipeline through a flange; the first heat exchange unit and the second heat exchange unit are movably connected with the shell frame through the suspension guide assembly.
2. The fan heater of the coal-fired boiler of the thermal power plant as claimed in claim 1, wherein: the suspension guide assembly comprises a first suspension guide unit connected with the air inlet connecting pipe and a second suspension guide unit connected with the water drainage connecting pipe.
3. The fan heater of the coal-fired boiler of the thermal power plant as claimed in claim 2, characterized in that: the first suspension guide unit comprises M-shaped slide rails arranged on two sides of the inner wall of the shell frame and a first guide plate arranged at the top of the air inlet union pipe; cylindrical sliding blocks matched with the M-shaped sliding rails are arranged on two sides of the bottom of the first guide plate; and a first reinforcing rib is arranged between the bottom of the M-shaped slide rail and the inner wall of the shell frame.
4. The fan heater of the coal-fired boiler of the thermal power plant as claimed in claim 2, characterized in that: the second hangs the guide unit and is in including setting up second deflector and setting on the drainage union coupling are in the limiting plate of second deflector top, the limiting plate with be provided with the second strengthening rib between the shell frame inner wall.
5. The fan heater of the coal-fired boiler of the thermal power plant as claimed in claim 1, wherein: the heat exchange tube is divided into an upper layer and a lower layer.
6. The fan heater of the coal-fired boiler of the thermal power plant as claimed in claim 1, wherein: the outer surfaces of the left side and the right side of the shell frame are provided with a plurality of threaded holes for installing sealing plates of the air heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121653179.2U CN216047821U (en) | 2021-07-20 | 2021-07-20 | Fan air heater of coal-fired boiler of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121653179.2U CN216047821U (en) | 2021-07-20 | 2021-07-20 | Fan air heater of coal-fired boiler of thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216047821U true CN216047821U (en) | 2022-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121653179.2U Active CN216047821U (en) | 2021-07-20 | 2021-07-20 | Fan air heater of coal-fired boiler of thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216047821U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114688604A (en) * | 2022-04-28 | 2022-07-01 | 西安热工研究院有限公司 | Movable air heater system |
-
2021
- 2021-07-20 CN CN202121653179.2U patent/CN216047821U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114688604A (en) * | 2022-04-28 | 2022-07-01 | 西安热工研究院有限公司 | Movable air heater system |
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