CN212869837U - Prevent that air preheater from blockking up heat transfer device - Google Patents
Prevent that air preheater from blockking up heat transfer device Download PDFInfo
- Publication number
- CN212869837U CN212869837U CN202021544569.1U CN202021544569U CN212869837U CN 212869837 U CN212869837 U CN 212869837U CN 202021544569 U CN202021544569 U CN 202021544569U CN 212869837 U CN212869837 U CN 212869837U
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- China
- Prior art keywords
- air preheater
- outer frame
- hollow cylinder
- main part
- heat exchanger
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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 prevent that air preheater from blockking up heat transfer device, including the main part, the main part both ends are provided with the pipeline, and pipe connection dust remover and draught fan, the inside division of main part has a plurality of heat exchanger unit module. The heat exchanger unit module comprises an outer frame, the outer frame is of a square or cuboid structure, two ends of the outer frame are flues, and hollow cylinders are arranged inside the outer frame. The direction of flue seting up at frame both ends is the same with the pipeline installation direction, and hollow cylinder installation direction is perpendicular with the pipeline installation direction, and forced draught blower and air preheater are connected respectively to hollow cylinder both ends. The utility model provides high air preheater export flue gas temperature can effectively alleviate the air preheater blocking phenomenon that ammonium bisulfate caused. The utility model discloses carry out the heat transfer at the draught fan entry, reduced the flue gas temperature who gets into the boiler cigarette window, improved boiler efficiency.
Description
Technical Field
The utility model belongs to the technical field of the boiler heat transfer, a prevent that air preheater from blockking up heat transfer device is related to.
Background
With the enhancement of national environmental regulations, the flue gas denitration device (SCR/SNCR) of the power station boiler is widely applied to various power plants, and the problems of ammonia escape, ammonium bisulfate deposition ash blockage and corrosion are more common. The ammonium bisulfate has strong cohesiveness at 147-200 ℃, so that the air preheater has serious problems of ash blockage and corrosion. Therefore, the problems of increased running resistance of the air preheater, increased power consumption of the induced draft fan, reduced heat exchange performance of the air preheater, increased air leakage rate of the air preheater, corrosion of heat storage elements and the like are caused, and the load capacity and the running safety of the boiler are even affected in severe cases. Therefore, a device is needed to be designed for solving the problems of ash blockage and corrosion of the air preheater in the working process of the existing boiler.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a prevent that air preheater from blockking up heat transfer device, solved the problem that the air heater who exists among the prior art produced because of stifled ash, corrosion problems.
The utility model discloses the technical scheme who adopts is, a prevent that air preheater from blockking up heat transfer device, including the main part, the main part both ends are provided with the pipeline, and the inside division of main part has a plurality of heat exchanger unit module.
The utility model discloses a characteristics still lie in:
the heat exchanger unit module comprises an outer frame, the outer frame is of a square or cuboid structure, two ends of the outer frame are flues, and hollow cylinders are arranged inside the outer frame.
The flue opening direction at the two ends of the outer frame is the same as the flue installation direction, and the hollow cylinder installation direction is perpendicular to the pipeline installation direction.
The outer wall of the hollow cylinder is sleeved with H-shaped fins, and the interval between the fins is 1-2 cm.
Two planes at the two ends of the hollow cylinder of the outer frame are provided with inserting plate isolation doors.
The utility model has the advantages that:
1. the utility model provides high air preheater export flue gas temperature and overgrate air get into air preheater temperature. The blockage phenomenon of the air preheater caused by the ammonium bisulfate can be effectively relieved.
2. The utility model discloses carried out the heat transfer to the flue gas at the draught fan entry, effectively reduced the exhaust gas temperature of boiler, effectively guaranteed boiler efficiency.
Drawings
FIG. 1 is a schematic structural view of a heat exchanger for preventing an air preheater from blocking a heat exchanger according to the present invention;
FIG. 2 is a schematic structural diagram of a heat exchanger unit module of the heat exchange device for preventing the air preheater from blocking the heat exchange device;
FIG. 3 is a top view of the heat exchanger according to the present invention to prevent the air preheater from clogging;
FIG. 4 is a schematic diagram of the heat exchanger according to the present invention for preventing the air preheater from clogging;
in the figure, 1, a main body, 2, a heat exchanger unit module, 3, a pipeline, 2-1, an outer frame, 2-2, a hollow cylinder and 2-3, a plug board isolation door are arranged.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model provides a prevent that air preheater from blockking up heat transfer device, as shown in figure 1, including main part 1, 1 both ends of main part are provided with pipeline 3, and pipeline 3 connects dust remover and draught fan, and the inside division of main part has a plurality of heat exchanger unit module 2.
As shown in fig. 2 and 3, the heat exchanger unit module 2 comprises an outer frame 2-1, wherein the outer frame 2-1 is in a cube or cuboid structure, two ends of the outer frame 2-1 are flues, and a hollow cylinder 2-2 is arranged inside the outer frame 2-1. The direction of the flue at the two ends of the outer frame 2-1 is the same as the installation direction of the pipeline 3, the installation direction of the hollow cylinder 2-2 is vertical to the installation direction of the pipeline 3, and the two ends of the hollow cylinder 2-2 are respectively connected with the air feeder and the air preheater.
The outer wall of the hollow cylinder 2-2 is sleeved with H-shaped fins, the interval between the fins is 1-2cm, and the H-shaped fins are used for increasing the contact area and improving the heat exchange efficiency.
The height of the corrugated plate heat exchange plate of the original air preheater is reduced by 20-40 cm. And increasing the temperature of the flue gas at the outlet of the air preheater.
Two planes where the end parts of the two ends of the hollow cylinder 2-2 of the outer frame 2-1 are positioned are provided with inserting plate isolation doors 2-3. Each heat exchanger unit module 2 can be hung out from the top of the main body 1 for ash removal, leakage detection and maintenance. The flashboard isolation doors 2-3 of each heat exchanger unit module 2 are closed for service.
The utility model relates to a prevent that air preheater from blockking up heat transfer device, its working process as follows:
as shown in fig. 4, the main body 1 is connected with the dust remover and the induced draft fan through the flue, the flue gas from the dust remover enters the main body 1 through the flue, the induced draft fan of the flue on the other side works to provide power, the flue gas enters the heat exchanger unit module 2 in the main body 1, and the flues at two ends of the heat exchanger unit module 2 enter and exit one by one.
The flue gas enters the heat exchanger unit module 2 and passes through the outer side of the hollow cylinder 2-2, the flue gas entering direction is perpendicular to the installation direction of the hollow cylinder 2-2, the flue gas transfers heat to secondary air in the hollow cylinder 2-2, and the air feeder provides power to deliver the secondary air to the air preheater through the hollow cylinder 2-2.
The utility model relates to a prevent that air preheater from blockking up heat transfer device, its advantage lies in:
1. the temperature of the flue gas at the outlet of the air preheater and the temperature of the secondary air entering the air preheater are improved. Effectively relieve the blockage phenomenon of the air preheater caused by the ammonium bisulfate.
2. The heat exchange is carried out on the flue gas at the inlet of the draught fan, the smoke exhaust temperature of the boiler is effectively reduced, and the boiler efficiency is guaranteed not to be reduced.
3. Each unit module is a unit module as shown in fig. 2, and an isolation inserting plate door is arranged at a secondary air inlet and a secondary air outlet of each unit module, so that when a leakage phenomenon occurs in one unit, the unit modules can be effectively isolated. And the unit module is lifted out from the right upper part of the flue, and the flue side of the unit is blocked by a steel plate. So as not to affect the normal operation of the flue.
Claims (5)
1. The utility model provides a prevent that air preheater from blockking up heat transfer device, its characterized in that, including main part (1), main part (1) both ends are provided with pipeline (3), and the inside division of main part has independent heat exchanger unit module (2) of a plurality of.
2. The heat exchange device for preventing the air preheater from being blocked according to claim 1, wherein the heat exchanger unit module (2) comprises an outer frame (2-1), the outer frame (2-1) is of a cube or cuboid structure, the two ends of the outer frame (2-1) are provided with flues, and a hollow cylinder (2-2) is arranged inside the outer frame (2-1).
3. The heat exchange device for preventing the air preheater from being blocked according to the claim 2, wherein the flue opening direction at the two ends of the outer frame (2-1) is the same as the installation direction of the pipeline (3), and the installation direction of the hollow cylinder (2-2) is vertical to the installation direction of the pipeline (3).
4. The heat exchange device for preventing the air preheater from being blocked as claimed in claim 2, wherein the outer wall of the hollow cylinder (2-2) is sleeved with H-shaped fins, and the interval between the fins is 1-2 cm.
5. A heat exchanger against air preheater clogging according to claim 2 characterized in that the two planes of the two ends of the hollow cylinder (2-2) of the outer frame (2-1) are provided with flashboard isolation doors (2-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021544569.1U CN212869837U (en) | 2020-07-30 | 2020-07-30 | Prevent that air preheater from blockking up heat transfer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021544569.1U CN212869837U (en) | 2020-07-30 | 2020-07-30 | Prevent that air preheater from blockking up heat transfer device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212869837U true CN212869837U (en) | 2021-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021544569.1U Expired - Fee Related CN212869837U (en) | 2020-07-30 | 2020-07-30 | Prevent that air preheater from blockking up heat transfer device |
Country Status (1)
| Country | Link |
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| CN (1) | CN212869837U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111981501A (en) * | 2020-07-30 | 2020-11-24 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Anti-blocking heat exchange device of air preheater of pulverized coal boiler |
-
2020
- 2020-07-30 CN CN202021544569.1U patent/CN212869837U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111981501A (en) * | 2020-07-30 | 2020-11-24 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Anti-blocking heat exchange device of air preheater of pulverized coal boiler |
| CN111981501B (en) * | 2020-07-30 | 2024-07-23 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Anti-blocking heat exchange device of air preheater of pulverized coal boiler |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210402 Termination date: 20210730 |
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| CF01 | Termination of patent right due to non-payment of annual fee |