CN201407645Y - Radial heat pipe economizer - Google Patents
Radial heat pipe economizer Download PDFInfo
- Publication number
- CN201407645Y CN201407645Y CN2009200459727U CN200920045972U CN201407645Y CN 201407645 Y CN201407645 Y CN 201407645Y CN 2009200459727 U CN2009200459727 U CN 2009200459727U CN 200920045972 U CN200920045972 U CN 200920045972U CN 201407645 Y CN201407645 Y CN 201407645Y
- Authority
- CN
- China
- Prior art keywords
- heat pipe
- pipe
- radial heat
- heat
- furnace gas
- 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
Links
Images
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model relates to a radial heat pipe economizer, comprising a furnace gas pipeline and a radial heat pipe, a plurality of radial heat pipes are serially connected and are arrayed in the furnace gas pipeline in a snake-like way by a bent pipe, the radial heat pipe is a pin fin tubular radial heat pipe which is composed of a pin fin pipe and a basal pipe. The arrangement direction of theradial heat pipe is vertical to the flowing direction of the furnace gas in the furnace gas pipeline, the acicular heat-radiation fin on the pin fin pipe is a steel nail which is arranged vertically,air flows form symmetrical stable vortex and a return flow zone on the back surface of a column of a steel needle, a heat boundary layer is damaged and re-formed continuously, the heat convection coefficient at flue gas side is enhanced, under the violent impact of the air flows, the steel needle generate slight vibration with violent turbulent flow scouring of the flue gas, so as to lead the equipment to have stronger self ash-removal capacity and ash-scaling prevention capacity; meanwhile, the pin fin pipe structure adopted by the utility model has small and compact structure, sixteen steelnails are distributed on one circle of pipe diameter, thereby increasing the heat-transferring area.
Description
Technical field
The utility model relates to the waste heat recovery apparatus in the pyrite-based sulfuric acid production production, is mainly used in high temperature in the pyrite-based sulfuric acid production production technology, the big residual neat recovering system of high burn into ash amount, is a kind of radial heat pipe economizer.
Background technology
At present, during pyrite-based sulfuric acid production is produced, sulphur iron ore in fluidizing reactor through roasting, generation contain a large amount of SO
2With a small amount of SO
3Furnace gas earlier carry out waste heat recovery through the medium temperature and medium pressure waste heat boiler, after the furnace gas cooling through cyclone dust collector, pass through electric dust collector (some producer does not have electric precipitation) again, furnace gas temperature is 320 ℃～380 ℃, enter purification section, through the cooling tower water-cooled furnace gas temperature is cooled to 60～70 ℃ then and enters follow-up workshop section again, but furnace gas not only makes the waste heat of furnace gas not obtain reasonable use by water-cooled, the work on the spot environment temperature is raise and the formation thermal pollution, reduce furnace gas temperature but also will waste great amount of water resources.In addition, contain a large amount of SO in the furnace gas
2With a spot of SO
3And H
2O, and the dew-point temperature of furnace gas is generally about 230 ℃, if use common tubular heat exchanger equipment to reclaim burner gas residual heat, tubular heat exchanger equipment tube wall temperature is low excessively, the dew point corrosion phenomenon will occur, and in case leak, can not repair, influence the overall operation of system.Simultaneously, also containing a large amount of ash contents in the furnace gas, also is to influence system's factor of operation continuously so mainly there is the dust stratification problem in existing fin tube type radial heat pipe economizer.
Summary of the invention
Problem to be solved in the utility model is: the existing fin-tube heat exchanger that is used for pyrite-based sulfuric acid production roasting workshop section can not well adapt to bad working environment such as the sulfuric acid production system dustiness is bigger.
The technical solution of the utility model is: the radial heat pipe economizer, comprise furnace gas pipeline and radial heat pipe, many radial heat pipes are by snakelike being arranged in the furnace gas pipeline of bend pipe series connection, radial heat pipe that direction is set is vertical with the flow direction of furnace gas in the furnace gas pipeline, radial heat pipe is a Needle fin tube formula radial heat pipe, described Needle fin tube formula radial heat pipe is made up of Needle fin tube and parent tube, Needle fin tube is socketed in outside the parent tube, fill working medium between Needle fin tube and parent tube, Needle fin tube formula radial heat pipe both sides are shut with plug and are vacuum structure.
Aciculiform heat radiation wing on the utility model Needle fin tube is the steel nail of vertically disposed diameter 4-12mm, the caliber 38-68mm of Needle fin tube.
Owing to contain a large amount of SO in the pyrite-based sulfuric acid production roasting workshop section furnace gas
2With a spot of SO
3, as newly-increased common tubular heat exchanger equipment, in case its tube wall temperature is low excessively, the dew point corrosion phenomenon will appear, and easily leak, and can not repair, influence the overall operation of system.The utility model has adopted Needle fin tube formula radial heat pipe as heat transfer element, and Needle fin tube formula radial heat pipe economizer equipment can the waste heat boiler feedwater of preheating and baking workshop section when reducing flue-gas temperature.The structure of heat pipe itself and equipment can fundamentally avoid sulfur-bearing stove G﹠W side to contact, and even furnace gas side heat pipe corrosion leakage can not make water and furnace gas intercommunication yet, the water side still can normally be moved, and can not make system shutdown because of this equipment.The utility model is applicable to the various occasions that need burner gas residual heat to reclaim, can dust stratification, also can well adapt to abominable working environments such as the high corrosion of high temperature.
Consider big ash amount is arranged in this workshop section's furnace gas, the utility model radial heat pipe that direction is set is vertical with the flow direction of furnace gas in the furnace gas pipeline, aciculiform heat radiation wing on the Needle fin tube is vertically disposed steel nail, air-flow forms the stable state vortex and the recirculating zone of symmetry at the cylinder back side of draw point, the convection transfer rate of fume side has been strengthened in the constantly destroyed and formation again of thermal boundary layer.And under the intense impact of air-flow, draw point self produces slight vibration, adds that the strong turbulent flow of flue gas washes away, thereby it is stronger from ash disposal ability and pre-anti-gray fouling ability that equipment is possessed.Simultaneously, the Needle fin tube structure compact of employing of the present utility model, caliber can be arranged 16 steel nails on one week, has increased heat-transfer area, because structure is small and exquisite, also more radial heat pipe can be set in the same furnace gas pipeline.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the structural representation of the utility model Needle fin tube formula radial heat pipe.
The specific embodiment
As Fig. 1, the utility model comprises furnace gas pipeline 1 and Needle fin tube formula radial heat pipe 2, many Needle fin tube formula radial heat pipes 2 are by snakelike being arranged in the furnace gas pipeline 1 of bend pipe 3 series connection, Needle fin tube formula radial heat pipe 2 that direction is set is vertical with the flow direction of furnace gas in the furnace gas pipeline 1, Needle fin tube formula radial heat pipe 2 is made up of Needle fin tube 21 and parent tube 22, Needle fin tube 21 is socketed in outside the parent tube 22,22 of Needle fin tube 21 and parent tubes are filled working medium 23, and Needle fin tube formula radial heat pipe 2 both sides are shut with plug 24 and are vacuum structure.As shown in Figure 2.
Aciculiform heat radiation wing 25 on the utility model Needle fin tube 21 is the steel nail of vertically disposed diameter 4-12mm, the caliber 38-68mm of Needle fin tube 21.As optimal way, 16 steel nails evenly distribute in 21 1 weeks of cast-over finned tube.
Needle fin tube formula radial heat pipe of the present utility model charges into specific working medium in the airtight tube chamber liquid pool of high vacuum, hot fluid makes the working medium vaporization by steel nail and outer heating surface of tubes.Under the differential pressure action of steam, working substance steam flows to the parent tube outer wall in tube chamber, is cold fluid owing to what flow in the parent tube, and working substance steam is condensed and release heat at the parent tube outer wall, and heat is passed to the cold fluid in the parent tube, makes cold fluid obtain heat.And the working medium liquid that condenses on the parent tube outer wall absorbs the heat of vaporization vaporization once more, emits heat at the parent tube outer wall then, makes heat produce transmission between cold fluid and hot fluid, goes round and begins again.
The utility model is the many radial heat pipes formation serpentine coil bundle of contacting, and boiler feedwater is flowed through in the pipe of radial heat pipe.After heat exchange was carried out in the tube bank of corrosivity furnace gas and radial heat pipe, the working medium in the radial heat pipe was vaporized, the boiler feedwater in the heating radial heat pipe parent tube.Because the vapour-liquid two-phase is in the saturation balance state in the radial heat pipe, the radial heat pipe tube wall has good isothermal, can avoid being present in the part " cold-zone " of common economizer water inlet place, remain on the corrosive fume dew-point temperature by carrying out the tube wall temperature that reasonable structural design can improve radial heat pipe tube bank, thereby avoid acid dew piont corrosion to take place, in the service life of raising equipment, guarantee the normal operation of producing.Also can require the tube bank of flexible arrangement radial heat pipe in the practical application according to different process.Simultaneously because the radial heat pipe element is a double-decker, just in case when start-stop car or heat recovery equipment leakage takes place cause radial heat pipe outer wall eating thrown, the boiler feedwater in the parent tube can not leak into furnace gas pipeline yet.
Because radial heat pipe inside is pumping high vacuum, so working media is carburation by evaporation very easily, and be phase-change heat transfer, the intraductal heat transfer thermal resistance is very little, can obtain the bigger coefficient of overall heat transmission with the less temperature difference, and it is simple in structure, particularly because the distinctive heat-transfer mechanism of radial heat pipe, can manage outer the heat transfer easily and strengthening, as adding expansion heat-transfer area such as steel nail, to overcome gas converting heat coefficient problem of smaller, make the entire equipment compact conformation, Needle fin tube structure compact of the present utility model, caliber can be arranged 16 steel nails on one week, has increased heat-transfer area.
The utility model adopts Needle fin tube formula radial heat pipe as heat transfer element following benefit to be arranged:
A) high heat transfer coefficient: the heat transfer of radial heat pipe is to utilize heat pipe inner fluid state variation to conduct heat, and heat transfer coefficient is very high.For improving outside the radial heat pipe and the convective heat-transfer coefficient of air-flow, pipe is outer to be provided with steel nail, has further improved whole heat-transfer character;
B) ability of transfer of heat is big: send heat, and the calorie value that is meant from boiling section to the section of condensing to be sent, this being transmitted in the heat pipe is that mode by transmitting latent heat is carried out, therefore the ability that can transmit greater than alternate manner such as flow by heat conduction, fluid out and away;
C) good isothermal: because the inner working solution purity height of pipe, the boiling of radial heat pipe inside and condensation process promptly are that constant temperature is again the process of constant voltage, so bringing-up section and cooling section all are the zones of constant temperature;
D) hot fluid and cold fluid do not leak mutually: heat exchange of heat pipe one side pipe has damage, it is this heat pipe failure, heat exchange area reduces, but two media does not leak mutually, this is because of the opposite side of heat pipe or seals, the device that this advantage is produced for continuity seems very important, because it can not cause device frequently to stop;
E) simple in structure, element is replaceable: because the element of radial heat pipe be independent installation, thereby not only simple in structure, and the quantity of heat-pipe elements can increase and decrease according to the heat exchange amount, also can change individually simultaneously;
F) the radial heat pipe equipment investment is few, easy to maintenance: safe and reliable, there are not other auxiliary equipment, and operating cost is low.
Heat flow density by control heat pipe cold hot-fluid side is controlled the thermotube wall temperature, makes as much as possible the heating pipe wall temperature Degree is higher than 200 ℃ all the time, thereby guarantees in design long-term, safe, the reliably operation of heat pipe evaporator. This practicality The Needle fin tube formula radial heat pipe of novel employing can be alleviated the dust stratification problem greatly, and has heat transfer property height, compact conformation Etc. advantage.
(1) adopts Needle fin tube expansion heat-transfer area, overcome the little problem of the recuperated gas coefficient of heat transfer, make device structure tight Gather, thereby reduce equipment investment;
(2) Needle fin tube is low to the resistance that furnace gas flows, and is little to the SR impact;
(3) according to the furnace gas Scouring Characteristic, pin type pipe can be made different surface configurations, and no matter flue gas is from which direction Wash away tube bank, air-flow forms symmetrical stable state vortex and recirculating zone at the cylinder back side of draw point, and thermal boundary layer is constantly broken Badly and again form, strengthened the convection transfer rate of furnace gas side. And under the intense impact of air-flow, draw point self produces light Little vibration adds that the strong turbulent flow of flue gas washes away, and pin type pipe is standby stronger from ash disposal ability and pre-anti-gray fouling ability;
(4) according to the furnace gas characteristic, rationally adjust steel nail layout density on velocity of medium and the Needle fin tube formula radial heat pipe, make Furnace gas realizes from deashing that by air-flow non-scaling does not stop up when passing through the Needle fin tube surface, keep long-time efficient operation.
Claims (3)
1, the radial heat pipe economizer, comprise furnace gas pipeline (1) and radial heat pipe, it is characterized in that many radial heat pipes are by bend pipe (3) series connection, snakelike being arranged in the furnace gas pipeline (1), the flow direction that furnace gas in direction and the furnace gas pipeline (1) is set of radial heat pipe is vertical, radial heat pipe is a Needle fin tube formula radial heat pipe (2), described Needle fin tube formula radial heat pipe (2) is made up of Needle fin tube (21) and parent tube (22), Needle fin tube (21) is socketed in outside the parent tube (22), fill working medium (23) between Needle fin tube (21) and parent tube (22), Needle fin tube formula radial heat pipe (2) both sides are shut with plug (24) and are vacuum structure.
2, radial heat pipe economizer according to claim 1 is characterized in that the aciculiform heat radiation wing (25) on the Needle fin tube (21) is the steel nail of vertically disposed diameter 4-12mm, the caliber 38-68mm of Needle fin tube (21).
3, radial heat pipe economizer according to claim 2 is characterized in that 16 steel nails that evenly distribute in (21) one weeks of cast-over finned tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200459727U CN201407645Y (en) | 2009-05-12 | 2009-05-12 | Radial heat pipe economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200459727U CN201407645Y (en) | 2009-05-12 | 2009-05-12 | Radial heat pipe economizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201407645Y true CN201407645Y (en) | 2010-02-17 |
Family
ID=41678579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200459727U Expired - Fee Related CN201407645Y (en) | 2009-05-12 | 2009-05-12 | Radial heat pipe economizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201407645Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135271A (en) * | 2011-03-03 | 2011-07-27 | 上海阿波罗机械股份有限公司 | Flue gas waste heat recovery energy-saver of boiler wet desulphurization system |
| CN102353287A (en) * | 2011-09-03 | 2012-02-15 | 盐城市劲风节能环保设备有限公司 | Magnetic fluid heat pipe, coal economizer with same, method for using coal economizer, boiler and application of magnetic fluid heat pipe, coal economizer and boiler |
| CN104457339A (en) * | 2014-11-28 | 2015-03-25 | 中国平煤神马集团平顶山朝川焦化有限公司 | Economizer capable of preventing deflagration |
| CN104728825A (en) * | 2013-12-18 | 2015-06-24 | 招远市招金金合科技有限公司 | Low temperature exhaust heat utilization system and method |
| CN105547011A (en) * | 2016-02-05 | 2016-05-04 | 无锡市沈能节能锅炉股份有限公司 | Boiler flue gas tube heat exchanger with self-cleaning effect |
| CN106197089A (en) * | 2016-08-29 | 2016-12-07 | 江苏世能化工设备有限公司 | A kind of sulphuric acid flue gas waste heat recoverer |
| CN108844392A (en) * | 2018-08-10 | 2018-11-20 | 国家粮食局科学研究院 | A kind of heat exchanger |
| CN110174020A (en) * | 2019-05-28 | 2019-08-27 | 山东大学 | A kind of heat exchanger of unsymmetrical arrangement |
-
2009
- 2009-05-12 CN CN2009200459727U patent/CN201407645Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135271A (en) * | 2011-03-03 | 2011-07-27 | 上海阿波罗机械股份有限公司 | Flue gas waste heat recovery energy-saver of boiler wet desulphurization system |
| CN102135271B (en) * | 2011-03-03 | 2012-10-10 | 上海阿波罗机械股份有限公司 | Flue gas waste heat recovery energy-saver of boiler wet desulphurization system |
| CN102353287A (en) * | 2011-09-03 | 2012-02-15 | 盐城市劲风节能环保设备有限公司 | Magnetic fluid heat pipe, coal economizer with same, method for using coal economizer, boiler and application of magnetic fluid heat pipe, coal economizer and boiler |
| CN102353287B (en) * | 2011-09-03 | 2013-04-24 | 盐城市劲风节能环保设备有限公司 | Magnetic fluid heat pipe, coal economizer with same, method for using coal economizer, boiler and application of magnetic fluid heat pipe, coal economizer and boiler |
| CN104728825A (en) * | 2013-12-18 | 2015-06-24 | 招远市招金金合科技有限公司 | Low temperature exhaust heat utilization system and method |
| CN104457339A (en) * | 2014-11-28 | 2015-03-25 | 中国平煤神马集团平顶山朝川焦化有限公司 | Economizer capable of preventing deflagration |
| CN105547011A (en) * | 2016-02-05 | 2016-05-04 | 无锡市沈能节能锅炉股份有限公司 | Boiler flue gas tube heat exchanger with self-cleaning effect |
| CN106197089A (en) * | 2016-08-29 | 2016-12-07 | 江苏世能化工设备有限公司 | A kind of sulphuric acid flue gas waste heat recoverer |
| CN108844392A (en) * | 2018-08-10 | 2018-11-20 | 国家粮食局科学研究院 | A kind of heat exchanger |
| CN110174020A (en) * | 2019-05-28 | 2019-08-27 | 山东大学 | A kind of heat exchanger of unsymmetrical arrangement |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201407645Y (en) | Radial heat pipe economizer | |
| CN201246987Y (en) | Phase-change heat exchanger | |
| CN102927843A (en) | Flue gas waste heat recovery system based on liquid metal heat transfer | |
| CN103940087A (en) | Narrow gap flat round double-coil-pipe integral condensation boiler | |
| CN201242383Y (en) | Dual-purpose phase change heat exchanger for vapor and water | |
| CN201327013Y (en) | 100t/h fuel or gas steam injection boiler | |
| CN201407634Y (en) | Heat recovery boiler with soot deposit prevention and corrosion-resistant structure | |
| CN112728776A (en) | External particle heat absorber and solar power generation system | |
| CN201081587Y (en) | Composite heat pipe heat exchanger | |
| CN215951481U (en) | Low-temperature heat exchange island of blast furnace gas boiler | |
| CN203628620U (en) | Reinforced composite phase change heat exchanger | |
| CN216081103U (en) | Heat pipe type heat exchanger | |
| CN103353107B (en) | Device capable of obtaining superheated steam from high-temperature high-pressure gas | |
| CN202928095U (en) | Heat exchanging structure with air pre-heater | |
| CN102419122A (en) | Two-phase-flow air preheater | |
| CN103292305A (en) | Radial heat tube-ordinary heat exchange tube combined type waste heat recovery device for flue tail gases | |
| CN203454852U (en) | Stainless steel corrugated pipe condenser of condensing type gas water heater | |
| CN218120713U (en) | Dustproof split type gas phase change heat exchanger | |
| CN212930069U (en) | Two-phase flow phase-change heat radiator | |
| CN202303891U (en) | Double-output compound boiler | |
| CN212481362U (en) | Energy-saving corrosion-resistant efficient heat exchange device | |
| CN210070689U (en) | Composite phase change heat exchanger | |
| CN205824998U (en) | A kind of small scall coal-fired boiler integral economizer | |
| CN201406385Y (en) | Small nitrogenous fertilizer gas-making waste heat boiler | |
| CN202304515U (en) | Two-phase flow air preheater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100217 Termination date: 20160512 |