CN2555468Y - Medium heat exchanger with split-flow and hybrid temp regulation - Google Patents
Medium heat exchanger with split-flow and hybrid temp regulation Download PDFInfo
- Publication number
- CN2555468Y CN2555468Y CN02246996U CN02246996U CN2555468Y CN 2555468 Y CN2555468 Y CN 2555468Y CN 02246996 U CN02246996 U CN 02246996U CN 02246996 U CN02246996 U CN 02246996U CN 2555468 Y CN2555468 Y CN 2555468Y
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- medium
- temperature
- utility
- model
- Prior art date
- 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.)
- Expired - Fee Related
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Classifications
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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
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model relates to a corrosion resistant cryogenic heat exchanger. On the basis of general forced circulation medium heat exchanger, the utility model communicates the hot end with the cold end of medium by a closed tube with control valve, distributes a part of hot medium and mixes with cold medium to control the temperature of re-fluent medium, and keeps the temperature of wall of smoke side above the temperature of acid dew point of smoke; consequently, the utility model can avoid acid corrosion of heat exchanger while making fully use of the low temperature waste heat of smoke. The heat exchanger is an air preheater, as well as a fuel economizer.
Description
Affiliated technical field
The utility model relates to a kind of heat-exchange apparatus that utilizes low temperature exhaust heat, specifically can utilize the waste heat of flue gas exactly, can prevent the heat exchanger of acid corrosion again.
Technical background
Heat energy apparatus always will reduce exhaust gas temperature as far as possible, to improve the thermal efficiency of device.But the reduction of exhaust gas temperature is easy to cause acid dew and condenses on the lower wall of temperature; cause the corrosion of metal wall, for protection equipment, often allow exhaust gas temperature keep higher level in the reality; or carrying out preheating to being heated fluid, this has just sacrificed the thermal efficiency of device.At present, can utilize low temperature exhaust heat, can prevent that again the approach that corrodes from mainly containing two: 1, adopt cast iron to make heat exchanger.Though cast iron is anticorrosion, machining property is too poor, and its application is restricted.2, improve wall surface temperature by intermediate medium.But general heat-pipe heat exchanger and circulation medium formula heat exchanger lack regulating power, and only effective in design conditions, the off-design operating mode acid corrosion will take place in the same old way; Though and the complex phase-change heat exchanger of invention can address this problem recently, system complex, the cost height, too poor to the adaptability of original device, so be difficult on the engineering promote.This shows, heat energy apparatus anticorrosion and efficient between contradiction do not obtain satisfied solution so far as yet.
The utility model at UTILIZATION OF VESIDUAL HEAT IN and anticorrosion between problem, a kind of heat exchanger of controlling fume side lowermost wall surface temperature by the shunting and the mixing of circulation medium is provided, can maximally utilise the low temperature heat energy of flue gas, improve the device thermal efficiency, can prevent the low temperature acid corrosion again, and regulate easyly, adaptability is good, can be designed to air preheater or economizer according to actual needs.
Technical scheme
The technical scheme in the invention for solving the technical problem is: on the basis of common forced circulation medium formula heat exchanger, maximum temperature point and minimum temperature point with a pipeline UNICOM circulation medium, shunting a part of heating agent mixes with refrigerant after the heat release, mixed proportion by the valve regulated hot and cold stream on the cross over pipe, make mixed temperature maintenance in certain level, thereby the minimum temperature that guarantees the fume side wall is more than dew-point temperature, prevent the acid corrosion of fume side, and exhaust gas temperature can reduce significantly than general heat exchanger.Medium is a conduction oil, and valve can also can be regulated by the PID adjuster automatically according to the mixing temperature manual adjustments.Waste heat can also can absorb (being economizer) by water by absorption of air (being air preheater).
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is a schematic diagram of the present utility model.
Fig. 2 is the schematic diagram that the utility model is used for air preheater.
Fig. 3 is the schematic diagram that the utility model is used for economizer.
The specific embodiment
Among Fig. 1, Fig. 2, Fig. 3,1. mixing tube, 2. thermometer, 3. cross over pipe, 4. control valve, 5. oil expansion tank, 6. cold junction oil return pipe, 7. heat release pipe, 8. heated medium (air), 9. flue gas, 10. housing, 11. endothermic tubes, 12. circulating pump, 13. inlet headers, 14.PID adjuster, 15. outlet headers, 16. the shunting header, 17. water inlets, 18. water heating cabinets, 19. water outlets, 7 '. fin heat release pipe, 7 ". disc type heat release pipe, 11 '. the fin endothermic tube.
Fig. 2 is the air preheater that the utility model is specialized.The adjusting of valve is automatically, is controlled by mixing temperature; Heat exchanger tube has adopted finned coiled pipe, to increase heat exchange area.
Fig. 3 is the economizer that the utility model is specialized.The valve manual adjustments; Fume side adopts finned coiled pipe; The water side is the disc type pipe, to dwindle the sectional area of water side.
Claims (1)
- A kind of heat exchanger, it is characterized in that: in common forced circulation medium formula heat exchanger, cross over pipe with a band control valve, hot junction and cold junction UNICOM with medium, shunting a part of heat medium mixes with cold medium, to improve the inlet temperature of backflow medium, the minimum temperature of fume side tube wall is remained on more than the flue gas acid dew point temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02246996U CN2555468Y (en) | 2002-08-05 | 2002-08-05 | Medium heat exchanger with split-flow and hybrid temp regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02246996U CN2555468Y (en) | 2002-08-05 | 2002-08-05 | Medium heat exchanger with split-flow and hybrid temp regulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2555468Y true CN2555468Y (en) | 2003-06-11 |
Family
ID=33718071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02246996U Expired - Fee Related CN2555468Y (en) | 2002-08-05 | 2002-08-05 | Medium heat exchanger with split-flow and hybrid temp regulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2555468Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832546A (en) * | 2009-03-10 | 2010-09-15 | 巴布科克和威尔科克斯能量产生集团公司 | Integrated split stream water coil air heater and economizer (IWE) |
| CN102494330A (en) * | 2011-12-21 | 2012-06-13 | 王俊杰 | Comprehensive utilization device for flue gas waste heat of boiler by using heat pipe technology |
| CN102494329A (en) * | 2011-12-21 | 2012-06-13 | 王俊杰 | Device for utilizing flue gas waste heat of boiler comprehensively |
-
2002
- 2002-08-05 CN CN02246996U patent/CN2555468Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832546A (en) * | 2009-03-10 | 2010-09-15 | 巴布科克和威尔科克斯能量产生集团公司 | Integrated split stream water coil air heater and economizer (IWE) |
| CN102494330A (en) * | 2011-12-21 | 2012-06-13 | 王俊杰 | Comprehensive utilization device for flue gas waste heat of boiler by using heat pipe technology |
| CN102494329A (en) * | 2011-12-21 | 2012-06-13 | 王俊杰 | Device for utilizing flue gas waste heat of boiler comprehensively |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |