CN102235660A - Tail gas heat exchanger for steam boiler - Google Patents
Tail gas heat exchanger for steam boiler Download PDFInfo
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- CN102235660A CN102235660A CN2011100289304A CN201110028930A CN102235660A CN 102235660 A CN102235660 A CN 102235660A CN 2011100289304 A CN2011100289304 A CN 2011100289304A CN 201110028930 A CN201110028930 A CN 201110028930A CN 102235660 A CN102235660 A CN 102235660A
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- heat exchanger
- tail gas
- steam boiler
- flue
- gas heat
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Abstract
The invention relates to a tail gas heat exchanger for a steam boiler. The heat exchanger comprises a coal economizer and a dust removal device, wherein a smoke inlet of the coal economizer is connected with a tail gas exhaust port of the steam boiler; a smoke outlet of the coal economizer is connected with a smoke inlet of the dust removal device; and a smoke outlet of the dust removal device is connected with a chimney. By utilizing the tail gas heat exchanger, the influence of low temperature corrosion to equipment is reduced, the tail gas of a molten salt furnace can be efficiently utilized in segments, and the manufacture and maintenance cost is reduced.
Description
Technical field
The present invention relates to a kind of tail gas heat exchanger, particularly a kind of steam boiler tail gas heat exchanger.
Background technology
Steam boiler is a kind of of Industrial Boiler, uses very extensive.TSG G0002-2010 and GB50273 have clearly stipulated Industrial Boiler thermal efficiency index, and smog discharge temperature requires to be controlled at about 170 degrees centigrade.Traditional steam boiler directly discharges tail gas, and the boiler tail flue gas temperature is 300 degrees centigrade to 580 degrees centigrade, does not reach the standard thermal efficiency certainly.And add air preheater, and needing the reduction exhaust gas temperature to make the exhaust emissions temperature for 130 degrees centigrade to 410 degrees centigrade is about 170 degrees centigrade, then required air preheater heat exchange area is big.If boiler furnace smoke temperature is higher, then the air preheater heat exchange area is very big, and this has increased the device fabrication cost greatly.If use heat exchanger to recycle tail gas, because heat exchanger low-temperature zone generation cold end corrosion, seepage often appears in the panel weld place.Usually utilize the method for traditional repair welding to repair, the Tube Sheet of Heat Exchanger intralamellar part easily produces internal stress, and is difficult to eliminate, and causes other heat exchanger seepage to occur.By repair welding repeatedly, corrosion also can appear in weld seam once more behind the use some months, to the waste that enterprise brings human and material resources, financial resources, and the increase of production cost.
Summary of the invention
The technical problem to be solved in the present invention is: in order to reduce the influence of cold end corrosion to equipment, and effectively segmentation utilize molten salt furnace tail gas, the invention provides a kind of steam boiler tail gas heat exchanger.
The technical solution adopted for the present invention to solve the technical problems is: a kind of steam boiler tail gas heat exchanger, comprise economizer and dust arrester, the mouth that advances of economizer is connected with the exhaust port of steam boiler, the outlet flue of economizer connects the mouth that advances of dust arrester, and the outlet flue of dust arrester connects chimney.
Control for convenience and maintenance, the first flue pipeline that is connected with the exhaust port of steam boiler also is provided with flue outlet; Advancing of described economizer also is provided with the second flue pipeline between mouth and the outlet flue, the described second flue pipeline is provided with gas baffle.
In order effectively to remove the dust in the tail gas, described dust arrester is a multi-tube dust cleaner.
For a certain amount of life, industrial water are provided, can also comprise cryogenic heat exchanger, the outlet flue of described dust arrester connects the mouth that advances of cryogenic heat exchanger, and the outlet flue of cryogenic heat exchanger connects chimney.
The invention has the beneficial effects as follows that steam boiler tail gas heat exchanger of the present invention increases equipment such as economizer, and the air preheater heat exchange area is reduced, and reduces the device fabrication cost.Tail gas segmentation utilization also is provided with gas baffle and flue outlet, conveniently overhauls one by one, manages, and reduces operation and maintenance cost.Economizer and cryogenic heat exchanger are supplied with a certain amount of hot water, can make other purposes.When the composition of sulphur was high in the fuel, last cryogenic heat exchanger was only corroded in heat exchanger afterbody low-temperature zone generation cold end corrosion.Because the exhaust temperature through cryogenic heat exchanger is lower, only needs the most cheap material manufacturing, so the most cheap part in the only back-end surfaces that is corroded reduces maintenance cost.Simultaneously, the exhaust temperature that is discharged into chimney reduces, and prolongs the service life of chimney.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the structural representation of the optimum embodiment of steam boiler tail gas heat exchanger of the present invention.
Among the figure 1, economizer, 2, multi-tube dust cleaner, 3, chimney, 4-1, gas baffle, 4-2, flue outlet, 5, the first flue pipeline, 6, the second flue pipeline.
The specific embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, basic structure of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.
As shown in Figure 1, the structural representation of the optimum embodiment of steam boiler tail gas heat exchanger of the present invention, comprise economizer 1 and dust arrester, the mouth that advances of economizer 1 is connected with the exhaust port of steam boiler, the outlet flue of economizer 1 connects the mouth that advances of dust arrester, and the outlet flue of dust arrester connects chimney.
Control for convenience and maintenance, the first flue pipeline 6 that is connected with the exhaust port of steam boiler also is provided with flue outlet 4-2; Advancing of economizer 1 also is provided with the second flue pipeline 5 between mouth and the outlet flue, flue pipeline 5 is provided with gas baffle 4-1.
In order effectively to remove the dust in the tail gas, dust arrester is a multi-tube dust cleaner 2.
For a certain amount of life, industrial water are provided, can also comprise cryogenic heat exchanger, the outlet flue of multi-tube dust cleaner 2 connects the mouth that advances of cryogenic heat exchanger, and the outlet flue of cryogenic heat exchanger connects chimney 3.
The described boiler model of present embodiment is the SLZ6-1.6-AII coal-fired steam boiler, 6 tons of boiler outputs/time, about 305 degrees centigrade of boiler export cigarette temperature.About 305 degrees centigrade of the import cigarette temperature of economizer 1,170 degrees centigrade of outlet cigarette temperature; 60 degrees centigrade of inlet water temperatures, 112.2 degrees centigrade of outlet water temperatures.170 degrees centigrade flue gas is discharged in the atmosphere by chimney 3 through behind the multi-tube dust cleaner 2.170 degrees centigrade flue gas is through behind the cryogenic heat exchanger, and cryogenic heat exchanger can provide a certain amount of life industrial water, but hydraulic pressure is lower, and water temperature is lower.
With above-mentioned foundation desirable embodiment of the present invention is enlightenment, and by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.The technical scope of this invention is not limited to the content on the specification, must determine its technical scope according to the claim scope.
Claims (5)
1. steam boiler tail gas heat exchanger, it is characterized in that: comprise economizer (1) and dust arrester, the mouth that advances of economizer (1) is connected with the exhaust port of steam boiler, and the outlet flue of economizer (1) connects the mouth that advances of dust arrester, and the outlet flue of dust arrester connects chimney (3).
2. steam boiler tail gas heat exchanger as claimed in claim 1 is characterized in that: the first flue pipeline (6) that is connected with the exhaust port of steam boiler also is provided with flue outlet (4-2).
3. steam boiler tail gas heat exchanger as claimed in claim 1 is characterized in that: advancing of described economizer (1) also is provided with the second flue pipeline (5) between mouth and the outlet flue, the described second flue pipeline (5) is provided with gas baffle (4-1).
4. steam boiler tail gas heat exchanger as claimed in claim 1 is characterized in that: described dust arrester is multi-tube dust cleaner (2).
5. steam boiler tail gas heat exchanger as claimed in claim 1 is characterized in that: can also comprise cryogenic heat exchanger, the outlet flue of described dust arrester connects the mouth that advances of cryogenic heat exchanger, and the outlet flue of cryogenic heat exchanger connects chimney (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100289304A CN102235660A (en) | 2011-01-26 | 2011-01-26 | Tail gas heat exchanger for steam boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100289304A CN102235660A (en) | 2011-01-26 | 2011-01-26 | Tail gas heat exchanger for steam boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102235660A true CN102235660A (en) | 2011-11-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100289304A Pending CN102235660A (en) | 2011-01-26 | 2011-01-26 | Tail gas heat exchanger for steam boiler |
Country Status (1)
| Country | Link |
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| CN (1) | CN102235660A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102559490A (en) * | 2012-02-03 | 2012-07-11 | 德阳华宇瑞得智能科技有限公司 | Device and method for producing biogas by supplying boiler tail gas as heat source to anaerobic tank |
| CN102588932A (en) * | 2012-03-19 | 2012-07-18 | 郭丰亮 | Solid fuel steam engine |
-
2011
- 2011-01-26 CN CN2011100289304A patent/CN102235660A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102559490A (en) * | 2012-02-03 | 2012-07-11 | 德阳华宇瑞得智能科技有限公司 | Device and method for producing biogas by supplying boiler tail gas as heat source to anaerobic tank |
| CN102588932A (en) * | 2012-03-19 | 2012-07-18 | 郭丰亮 | Solid fuel steam engine |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111109 |