CN201973877U - High-temperature-air electric heater - Google Patents
High-temperature-air electric heater Download PDFInfo
- Publication number
- CN201973877U CN201973877U CN2011200982736U CN201120098273U CN201973877U CN 201973877 U CN201973877 U CN 201973877U CN 2011200982736 U CN2011200982736 U CN 2011200982736U CN 201120098273 U CN201120098273 U CN 201120098273U CN 201973877 U CN201973877 U CN 201973877U
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- sealed pressure
- electric heating
- pressure vessel
- heating tube
- pressure container
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Abstract
A high-temperature-air electric heater comprises a plurality of hollow electric heating tubes, a sealed pressure container with a cold air inlet and a hot air outlet, a front-end insulating fastener, and a tail-end insulating seal fastener, wherein the tail end of the sealed pressure container is sealed, the hot air outlet is arranged at the front end of the sealed pressure container, the cold air inlet is arranged on the wall of the pressure container close to the front end, the front-end insulating fastener is disposed inside the sealed pressure container and between the cold air inlet and the hot air outlet, the tail-end insulating seal fastener is disposed inside the sealed pressure container and close to the tail end, the hollow electric heating tubes are fixed inside the sealed pressure container through the front-end insulating fastener and the rear-end insulating fastener, and clearances are reserved among the electric heating tubes and among the electric heating tubes and the inner wall of the sealed pressure container. The high-temperature-air electric heater with the structure is small in size, high in power, high in efficiency, energy-saving, material-saving, high in air flow, low in flow reissuance, high in temperature dropping and rising speed, safe, explosion-proof and the like.
Description
Technical field
The utility model relates to electric airheater, is meant a kind of high-temperature air electric heater field especially.
Background technology
At present, the heating of tubing heat exchanger commonly used must generally be the magnesium powder by inserts, and heat is passed to the heating tube wall, carry out heat exchange with air again, this mode exists following disadvantage, and 1, heating efficiency is not high, 2, the heat waste consumption is big, waste a large amount of energy, 3, programming rate is slow, and 4, maximum temperature is low, 5, dangerous, 6, the life-span short, 7, shortcoming such as big takes up room.
The utility model has overcome above shortcoming, makes in many places that need high temperature air such as field and weapon industry at chemical industry, electric power, aviation and is used widely.
Summary of the invention
The purpose of this utility model is to provide a kind of heating efficiency height, and energy-conservation, programming rate is fast, safety, and the life-span is long, takes up room, and uses the few high-temperature air heater of material.
The technical scheme that adopts for solving the problems of the technologies described above is a kind of high-temperature air electric heater, electric heating tube by hollow, sealed pressure vessel with inlet of cold air and hot air outlet, front end insulating fixing piece and tail end insulated enclosure fixture constitute, the sealed pressure vessel tail end sealing, front end is provided with hot air outlet, be provided with inlet of cold air near on the pressure vessel wall of front end, in sealed pressure vessel inside, be provided with the front end insulating fixing piece between inlet of cold air and the hot air outlet, the front end insulating fixing piece is provided with plurality of holes and is used for fixing electric heating tube, be provided with tail end insulated enclosure fixture at the inner close tail end of sealed pressure vessel, tail end insulated enclosure fixture is provided with plurality of holes and is used for fixing electric heating tube, the electric heating tube of some hollows is fixed on sealed pressure vessel inside by front end insulating fixing piece and tail end insulated enclosure fixture, leave the space between the electric heating tube and between electric heating tube and the sealed pressure vessel inwall, be beneficial to circulation of air.
The electric heating tube of preferred hollow is made by nickel-bass alloy material, and promptly high temperature resistant have good electrical heating performance again.
The electric heating tube number of the hollow of optimum seeking method is 30-33.
Preferably also be provided with the explosion-proof wiring case at the sealed pressure vessel afterbody.
Employing allows Cryogenic air circulate from the inwall of container and the outside of electric heater heating pipe, flows out such structure from heat-generating pipe is inner then.Can make that the outside wall temperature of container can be too not high, can make full use of heat energy again, improve the efficiency of heating surface.This reform is obvious especially aspect efficiency of heating surface contrast, and conventional heating is that the heat that heater is produced is delivered on the heating shell by insulator again, finally finishes the heat exchange with medium, and efficient can be greater than 0.85.And the heat exchange mode of this heater adopts inside and outside wall while and medium direct heat transfer, has avoided intermediate link, improves heat exchange efficiency greatly, and efficient can reach about 0.93.
The light-wall pipe that adopts 30 ~ 33 nickel-bass alloy materials making is as heater and baffle, and the conventional heating heater of its sectional area ratio increases tens times.It is more to make that heater increases aspect mechanical performance and intensity.Not fragile under the impact of high temperature (800 ℃) high flow rates (600Kg/h) high pressures (3MPa) air-flow, can reach about 20 years service life.The heating of conventional electric heater is generally 5 years service life under normal operating condition.
Select directly contact heated medium (air) of heater for use, and it is in shell outer wall and inwall forced-convection heat transfer simultaneously with the heat exchange of medium, do not have middle heat transfer link, so its programming rate is very fast, and thermal inertia is very little.Heating rate can reach 11 ℃/S.And the conventional magnesium powder that uses does not have advantage in this respect as the heating of insulation filling material, and it makes that as the filling magnesium powder of insulation and heat transfer the thermal inertia of this class component is bigger, and intensification/rate of temperature fall is restricted.
Because adopt this medium circulation style, though reach 800 ℃ in heater outlet place temperature, the case surface temperature of heater not high (being lower than 50 ℃) can reach the highest temperature grade in explosive-proof grade.
The heater that adopts this structure is energy savings greatly.Conventional heating heater had not both reached such high temperature (generally about 450 ℃), also can give out a large amount of heats via container outer wall, even install the insulation measure additional, the heat of its loss also accounts for the 10%-15% of total amount of heat.The percentage of heat waste consumption is along with the temperature difference in container and the heat-insulation layer and the external world increases and increases, and the temperature difference is big more, thermal losses big more (conventional heater is 450 ℃ and 20 ℃).The utility model heater chamber wall and the extraneous temperature difference less (50 ℃ and 20 ℃).
High-temperature air heater is simple in structure, and volume is little, economical with materials.Conventional its heating of heater is in manufacturing process, and not only technology is numerous and diverse, and installation be take up room bigger, the air heater of same power, high temperature heater (HTH) will be littler lighter than conventional heater.
The beneficial effects of the utility model have that volume is little, power is big, efficient is high, energy-conservation a, material-saving, advantages such as gas flow is big, flow resistance is little, temperature rate is high, safety anti-explosive.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail.
Fig. 1 is the structural representation of high-temperature air electric heater.
Fig. 2 is the structural representation of front end insulating fixing piece.
Wherein icon 1, inlet of cold air, icon 2, hot air outlet, icon 3, sealed pressure vessel, the electric heating tube of icon 4, hollow, icon 5, front end insulating fixing piece, icon 6 tail end insulated enclosure fixtures, icon 7, explosion-proof wiring case.
The specific embodiment
With reference to Fig. 1, a kind of high-temperature air electric heater, electric heating tube 4 by hollow, sealed pressure vessel 3 with inlet of cold air 1 and hot air outlet 2, front end insulating fixing piece 5 and tail end insulated enclosure fixture 6 constitute, the sealed pressure vessel tail end sealing, front end is provided with hot air outlet 2, be provided with inlet of cold air 1 near on pressure vessel 3 walls of front end, in sealed pressure vessel 3 inside, be provided with front end insulating fixing piece 5 between inlet of cold air 1 and the hot air outlet 2, front end insulating fixing piece 5 is provided with plurality of holes and is used for fixing electric heating tube 4, be provided with tail end insulated enclosure fixture 6 at sealed pressure vessel 3 inner close tail ends, tail end insulated enclosure fixture 6 is provided with plurality of holes and is used for fixing electric heating tube 4, the electric heating tube 4 of some hollows is fixed on sealed pressure vessel 3 inside by front end insulating fixing piece 5 and tail end insulated enclosure fixture 6, leave the space between the electric heating tube 4 and between electric heating tube 4 and sealed pressure vessel 3 inwalls, be beneficial to circulation of air.
The electric heating tube of preferred hollow is made by nickel-bass alloy material, and promptly high temperature resistant have good electrical heating performance again.
The electric heating tube number of the hollow of optimum seeking method is 30-33.
Preferably also be provided with explosion-proof wiring case 7 at the sealed pressure vessel afterbody.
Claims (4)
1. high-temperature air electric heater, electric heating tube by hollow, sealed pressure vessel with inlet of cold air and hot air outlet, front end insulating fixing piece and tail end insulated enclosure fixture constitute, the sealed pressure vessel tail end sealing, front end is provided with hot air outlet, be provided with inlet of cold air near on the pressure vessel wall of front end, in sealed pressure vessel inside, be provided with the front end insulating fixing piece between inlet of cold air and the hot air outlet, the front end insulating fixing piece is provided with plurality of holes and is used for fixing electric heating tube, be provided with tail end insulated enclosure fixture at the inner close tail end of sealed pressure vessel, tail end insulated enclosure fixture is provided with plurality of holes and is used for fixing electric heating tube, the electric heating tube of some hollows is fixed on sealed pressure vessel inside by front end insulating fixing piece and tail end insulated enclosure fixture, leaves the space between the electric heating tube and between electric heating tube and the sealed pressure vessel inwall.
2. high-temperature air electric heater according to claim 1 is characterized in that the electric heating tube of hollow is made by nickel-bass alloy material.
3. high-temperature air electric heater according to claim 1, the electric heating tube number that it is characterized in that hollow is 30-33.
4. high-temperature air electric heater according to claim 1 is characterized in that also being provided with the explosion-proof wiring case at the sealed pressure vessel afterbody.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200982736U CN201973877U (en) | 2011-04-07 | 2011-04-07 | High-temperature-air electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200982736U CN201973877U (en) | 2011-04-07 | 2011-04-07 | High-temperature-air electric heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201973877U true CN201973877U (en) | 2011-09-14 |
Family
ID=44578979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200982736U Expired - Fee Related CN201973877U (en) | 2011-04-07 | 2011-04-07 | High-temperature-air electric heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201973877U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743087A (en) * | 2014-01-21 | 2014-04-23 | 华能无锡电热器材有限公司 | Energy saving heat exchanger |
| CN110068140A (en) * | 2019-03-19 | 2019-07-30 | 南京航空航天大学 | A kind of approximation isothermal wall pipe is interior to heat high-temperature air heater |
| CN113432295A (en) * | 2021-06-09 | 2021-09-24 | 北京航空航天大学 | Spiral high-flow ultrahigh-temperature air electric heater |
-
2011
- 2011-04-07 CN CN2011200982736U patent/CN201973877U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743087A (en) * | 2014-01-21 | 2014-04-23 | 华能无锡电热器材有限公司 | Energy saving heat exchanger |
| CN103743087B (en) * | 2014-01-21 | 2016-08-17 | 华能无锡电热器材有限公司 | Energy-saving heat exchanger |
| CN110068140A (en) * | 2019-03-19 | 2019-07-30 | 南京航空航天大学 | A kind of approximation isothermal wall pipe is interior to heat high-temperature air heater |
| CN113432295A (en) * | 2021-06-09 | 2021-09-24 | 北京航空航天大学 | Spiral high-flow ultrahigh-temperature air electric heater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20120407 |