CN102183153A - Tail gas heat exchanger for salt-melting furnace - Google Patents
Tail gas heat exchanger for salt-melting furnace Download PDFInfo
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- CN102183153A CN102183153A CN2011100282818A CN201110028281A CN102183153A CN 102183153 A CN102183153 A CN 102183153A CN 2011100282818 A CN2011100282818 A CN 2011100282818A CN 201110028281 A CN201110028281 A CN 201110028281A CN 102183153 A CN102183153 A CN 102183153A
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- mouth
- heat exchanger
- economizer
- outlet flue
- tail gas
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chimneys And Flues (AREA)
Abstract
The invention relates to a tail gas heat exchanger for a salt-melting furnace. The tail gas heat exchanger comprises a smoke generator for generating steam, an economizer, an air preheater and a dust removal device; the smoke inlet of the smoke generator is connected with the tail gas discharging opening of the salt-melting furnace; the smoke inlet of the economizer and the smoke inlet of the air preheater are connected with the smoke outlet of the smoke generator; the water supply inlet of the economizer is connected with an external water supply opening; the water supply outlet of the economizer is connected with the water inlet of the smoke generator; the smoke outlet of the air preheater and the smoke outlet of the economizer are connected with the smoke inlet of the dust removal device; and the smoke outlet of the dust removal device is connected with a chimney. By the tail gas heat exchanger, the influence of low-temperature erosion on equipment is reduced; moreover, the tail gas of the salt-melting furnace can be used effectively section by section, so that the manufacturing and maintenance cost is reduced.
Description
Technical field
The present invention relates to a kind of tail gas heat exchanger, particularly a kind of molten salt furnace tail gas heat exchanger.
Background technology
Molten salt furnace now is widely used in high temperature heating production technologies such as chemical fertilizer, ultrapas, aluminium oxide, and its flameholding can obtain higher operating temperature under lower operating pressure, and heat supply temperature is stable, can accurately adjust thermal efficiency height.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 molten salt furnace 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 molten salt furnace tail gas heat exchanger.
The technical solution adopted for the present invention to solve the technical problems is: a kind of molten salt furnace tail gas heat exchanger, comprise the smoke generator that is used to produce steam, economizer, air preheater and dust arrester, the mouth that advances of smoke generator is connected with the exhaust port of molten salt furnace, the outlet flue that mouth is connected smoke generator that advances that advances mouth and air preheater of economizer, the feed-water inlet of economizer is connected with outside feed water inlet, economizer connect the water inlet of smoke generator to water out, the outlet flue of air preheater is connected the mouth that advances of dust arrester with the outlet flue of economizer, the outlet flue of dust arrester connects chimney.
Control for convenience and maintenance also are provided with the first flue pipeline that mouth is connected with outlet flue that advances with described smoke generator, and the described first flue pipeline is provided with first switch valve.
Also be provided with described economizer advance mouth and air preheater advance that mouth is connected and with the second flue pipeline that mouth is connected that advances of dust arrester, the described second flue pipeline is provided with the second switch valve.
Described smoke generator enter the mouth place and the outlet flue place is provided with three switch valves and the 4th switch valve respectively, described economizer enter the mouth place and the outlet flue place is provided with the 5th switch valve and the 6th switch valve respectively, described air preheater enter the mouth place and the outlet flue place is provided with the 7th switch valve and the 8th switch valve respectively.
In order effectively to remove the dust in the tail gas, described dust arrester comprises multi-tube dust cleaner and water dust scrubber, the mouth that advances of multi-tube dust cleaner connects the outlet flue of air preheater and the outlet flue of economizer, the outlet flue of multi-tube dust cleaner connects the mouth that advances of water dust scrubber, and the outlet flue of water dust scrubber connects chimney.
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 molten salt furnace tail gas heat exchanger of the present invention increases equipment such as economizer, smoke generator, and the air preheater heat exchange area is reduced, and reduces the device fabrication cost.Tail gas segmentation utilization also is provided with controlled valve, conveniently overhauls one by one, manages, and reduces operation and maintenance cost.Economizer, smoke generator and cryogenic heat exchanger are supplied with a certain amount of steam and 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 molten salt furnace tail gas heat exchanger of the present invention.
Among the figure 1, smoke generator, 2, economizer, 3, air preheater, 4, multi-tube dust cleaner, 5, water dust scrubber, 6, chimney, 8-1, first switch valve, 8-2, second switch valve, 8-3, the 3rd switch valve, 8-4, the 4th switch valve, 8-5, the 5th switch valve, 8-6, the 6th switch valve, 8-7, the 7th switch valve, 8-8, the 8th switch valve, 9, the first flue pipeline, 10, 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 molten salt furnace tail gas heat exchanger of the present invention, comprise the smoke generator 1 that is used to produce steam, economizer 2, air preheater 3 and dust arrester, the mouth that advances of smoke generator 1 is connected with the exhaust port of molten salt furnace, the outlet flue that mouth is connected smoke generator 1 that advances that advances mouth and air preheater 3 of economizer 2, the feed-water inlet of economizer 2 is connected with outside feed water inlet, economizer 2 connect the water inlet of smoke generator 1 to water out, the outlet flue of the outlet flue of air preheater 3 and economizer 2 is connected the mouth that advances of dust arrester, and the outlet flue of dust arrester connects chimney 6.
In order effectively to remove the dust in the tail gas, dust arrester comprises multi-tube dust cleaner 4 and water dust scrubber 5, the mouth that advances of multi-tube dust cleaner 4 connects the outlet flue of air preheater 3 and the outlet flue of economizer 2, the outlet flue of multi-tube dust cleaner 4 connects the mouth that advances of water dust scrubber 5, and the outlet flue of water dust scrubber 5 connects chimney 6.
Control for convenience and maintenance also are provided with the first flue pipeline, 9, the first flue pipelines 9 that mouth is connected with outlet flue that advance of smoke generator 1 and are provided with the first switch valve 8-1.Also be provided with economizer 2 enter advancing that mouth is connected and being provided with second switch valve 8-2 of mouth and air preheater 3 with the second flue pipeline, 10, the second flue pipelines 10 that mouth is connected that advance of multi-tube dust cleaner 4.Advance mouth place and the outlet flue place of smoke generator 1 connect and are respectively equipped with the 3rd switch valve 8-3 and the 4th switch valve 8-4, economizer 2 enter the mouth place and the outlet flue place is provided with the 5th switch valve 8-5 and the 6th switch valve 8-6 respectively, air preheater 3 enter the mouth place and the outlet flue place is provided with the 7th switch valve 8-7 and the 8th switch valve 8-8 respectively.
For a certain amount of life, industrial water are provided, can also comprise cryogenic heat exchanger, the outlet flue of water dust scrubber 5 connects the mouth that advances of cryogenic heat exchanger, and the outlet flue of cryogenic heat exchanger connects chimney 6.
The described boiler model of present embodiment is the ORYL-2400MA molten salt furnace, boiler output 2,000,000 kilocalories/time, boiler export cigarette temperature is about 540 degrees centigrade.About 540 degrees centigrade of the import cigarette temperature of smoke generator 1, about 300 degrees centigrade of outlet cigarette temperature per hour provides about 0.5 ton of steam; 300 degrees centigrade of the import cigarette temperature of economizer 2,170 degrees centigrade of outlet temperatures provide hot water to the smoke generator water inlet to water out; Be arranged in parallel 25 square metres air preheater 3 with economizer 2, about 300 degrees centigrade of its gas approach temperature, 170 degrees centigrade of outlet cigarette temperature, the warm-air supply molten salt furnace burner hearth burning of generation is used.Behind 170 degrees centigrade the flue gas process multi-tube dust cleaner 4 and water dust scrubber 5, be discharged in the atmosphere by chimney 6.170 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 (6)
1. molten salt furnace tail gas heat exchanger, it is characterized in that: comprise the smoke generator (1) that is used to produce steam, economizer (2), air preheater (3) and dust arrester, the mouth that advances of smoke generator (1) is connected with the exhaust port of molten salt furnace, the outlet flue that mouth is connected smoke generator (1) that advances that advances mouth and air preheater (3) of economizer (2), the feed-water inlet of economizer (2) is connected with outside feed water inlet, economizer (2) connect the water inlet of smoke generator (1) to water out, the outlet flue of air preheater (3) is connected the mouth that advances of dust arrester with the outlet flue of economizer (2), the outlet flue of dust arrester connects chimney (6).
2. molten salt furnace tail gas heat exchanger as claimed in claim 1 is characterized in that: also be provided with the first flue pipeline (9) that mouth is connected with outlet flue that advances with described smoke generator (1), the described first flue pipeline (9) is provided with first switch valve (8-1).
3. molten salt furnace tail gas heat exchanger as claimed in claim 1, it is characterized in that: also be provided with described economizer (2) advance mouth and air preheater (3) advance that mouth is connected and with the second flue pipeline (10) that mouth is connected that advances of dust arrester, the described second flue pipeline (10) is provided with second switch valve (8-2).
4. as claim 1 or 2 or 3 described molten salt furnace tail gas heat exchanger, it is characterized in that: described smoke generator (1) enter the mouth place and the outlet flue place is provided with three switch valves (8-3) and the 4th switch valve (8-4) respectively, described economizer (2) enter the mouth place and the outlet flue place is provided with the 5th switch valve (8-5) and the 6th switch valve (8-6) respectively, described air preheater (3) enter the mouth place and the outlet flue place is provided with the 7th switch valve (8-7) and the 8th switch valve (8-8) respectively.
5. as claim 1 or 2 or 3 described molten salt furnace tail gas heat exchanger, it is characterized in that: described dust arrester comprises multi-tube dust cleaner (4) and water dust scrubber (5), the mouth that advances of multi-tube dust cleaner (4) connects the outlet flue of air preheater (3) and the outlet flue of economizer (2), the outlet flue of multi-tube dust cleaner (4) connects the mouth that advances of water dust scrubber (5), and the outlet flue of water dust scrubber (5) connects chimney (6).
6. as claim 1 or 2 or 3 described molten salt furnace tail gas heat exchanger, it 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 (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100282818A CN102183153A (en) | 2011-01-26 | 2011-01-26 | Tail gas heat exchanger for salt-melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100282818A CN102183153A (en) | 2011-01-26 | 2011-01-26 | Tail gas heat exchanger for salt-melting furnace |
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| Publication Number | Publication Date |
|---|---|
| CN102183153A true CN102183153A (en) | 2011-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100282818A Pending CN102183153A (en) | 2011-01-26 | 2011-01-26 | Tail gas heat exchanger for salt-melting furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514621A (en) * | 2017-09-29 | 2017-12-26 | 云南文山铝业有限公司 | Molten salt furnace flue gas waste heat recovery system |
| CN108488777A (en) * | 2018-03-08 | 2018-09-04 | 苏州天沃环境能源工程有限公司 | The heat energy recovery equipment of coal-fired molten salt furnace high-temp waste gas |
-
2011
- 2011-01-26 CN CN2011100282818A patent/CN102183153A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514621A (en) * | 2017-09-29 | 2017-12-26 | 云南文山铝业有限公司 | Molten salt furnace flue gas waste heat recovery system |
| CN108488777A (en) * | 2018-03-08 | 2018-09-04 | 苏州天沃环境能源工程有限公司 | The heat energy recovery equipment of coal-fired molten salt furnace high-temp waste gas |
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Application publication date: 20110914 |