CN112594928A - Airflow heating system - Google Patents
Airflow heating system Download PDFInfo
- Publication number
- CN112594928A CN112594928A CN202011521357.6A CN202011521357A CN112594928A CN 112594928 A CN112594928 A CN 112594928A CN 202011521357 A CN202011521357 A CN 202011521357A CN 112594928 A CN112594928 A CN 112594928A
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- Prior art keywords
- airflow
- heating system
- heating
- air inlet
- heater
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
- F24H3/08—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes
- F24H3/081—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes using electric energy supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0052—Details for air heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
- F24H9/1863—Arrangement or mounting of electric heating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2064—Arrangement or mounting of control or safety devices for air heaters
- F24H9/2071—Arrangement or mounting of control or safety devices for air heaters using electrical energy supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H2250/00—Electrical heat generating means
- F24H2250/08—Induction
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Direct Air Heating By Heater Or Combustion Gas (AREA)
- General Induction Heating (AREA)
Abstract
The invention relates to an airflow heating system, which comprises a heater body, wherein the heater body comprises a heater shell, an induction coil, a heat insulation layer and a graphite heating body; the induction coil is arranged around the graphite heating body, and the heat insulation layer is arranged between the graphite heating body and the induction coil; an airflow channel is arranged in the graphite heating body and comprises an air inlet and an air outlet. The heating system has high heating efficiency and small equipment volume, can heat the air flow in real time and has high heating temperature.
Description
Technical Field
The invention relates to the technical field of heat exchange, in particular to an airflow heating system.
Background
The existing gas heating equipment on the market has the defect of low heating temperature (450 ℃), cannot meet the requirement of heating large-flow and high-flow-rate gas to a high temperature of more than 2000 ℃ in real time, and often needs to improve the temperature of gas flow by enlarging the volume scale of the heating equipment, and the mode has the defect of overlarge occupied area of the equipment.
Therefore, how to provide an airflow heating system with high heating efficiency, small equipment volume, capability of heating airflow in real time and high heating temperature becomes a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide an air flow heating system, which has high heating efficiency, a small device size, and high heating temperature and can heat air flow in real time.
The technical scheme of the invention is as follows:
an airflow heating system comprises a heater body, wherein the heater body comprises a heater shell, an induction coil, a heat insulation layer and a graphite heating body; the induction coil is arranged around the graphite heating body, and the heat insulation layer is arranged between the graphite heating body and the induction coil; an airflow channel is arranged in the graphite heating body and comprises an air inlet and an air outlet.
Preferably, the gas flow channel is a spiral channel.
Preferably, the heater shell comprises an inner shell and an outer shell arranged outside the inner shell, and a cooling chamber is enclosed between the inner shell and the outer shell.
Preferably, the lower end of the outer shell is provided with a cooling medium inlet, and the upper end of the outer shell is provided with a cooling medium outlet.
Preferably, the device also comprises a hot air flow utilization device, wherein one end of the hot air flow utilization device is connected with the air outlet, and the other end of the hot air flow utilization device is connected with the air inlet; the air flow heated by the heater body enters the hot air flow utilization device from the air inlet to exchange heat.
Preferably, an air flow pressurizing device is further arranged between the hot air flow utilization device and the air inlet and used for pressurizing and accelerating the air flow.
Preferably, a switch valve is arranged between the airflow pressurizing device and the air inlet and used for controlling the on-off of the airflow.
Preferably, a pressure regulating valve is arranged between the air flow pressurizing device and the air inlet, and the pressure regulating valve is used for controlling the size of the air flow.
Preferably, a pressure sensor is arranged in the air flow channel, and the pressure sensor is connected with the pressure regulating valve through an air pressure control circuit.
Preferably, the heater body further comprises a temperature control mechanism, the temperature control mechanism comprises a temperature sensor, and the temperature sensor is arranged at the air outlet.
Preferably, the heat-insulating layer is one or more of alumina, magnesium oxide, a carbon fiber felt layer, a graphite fiber felt layer, a carbon powder layer, a carbon particle layer and a carbon fiber short filament layer; and/or the induction coil is any one or more of a tungsten coil, a molybdenum coil, a graphite coil and a carbon-carbon composite material coil.
The invention provides an airflow heating system which comprises a heater body, wherein the heater body comprises a heater shell, an induction coil, a heat insulation layer and a graphite heating body; the induction coil is arranged around the graphite heating body, and the heat insulation layer is arranged between the graphite heating body and the induction coil; an airflow channel is arranged in the graphite heating body and comprises an air inlet and an air outlet. The system heats the graphite heating body through the induction coil, and in the working process, airflow to be heated flows into the airflow channel inside the graphite heating body from the air inlet, is heated to a high temperature in the airflow channel and then flows out from the air outlet. The melting point of the graphite heating element is as high as 3500 ℃, so the graphite heating element can reach a very high self-heating temperature under the action of the induction coil, and the air flow can be heated to 2000 ℃ or even higher. Meanwhile, in order to reduce heat loss of the graphite heating body, a heat insulation layer is arranged between the graphite heating body and the induction coil, the heat insulation layer locks heat in a heating area as far as possible, energy loss is reduced, and heating efficiency of the airflow heating system is improved.
The invention has the following beneficial effects:
1. real-time heating of high-temperature gas can be realized.
2. Compared with other conventional heating methods, the heater has the advantages that under the requirements of the same flow rate and the same heating temperature, the scale of the heater body can be reduced by utilizing the high temperature difference, and the safety is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of the configuration of the gas flow heating system of the present invention;
reference numbers in the drawings illustrate: 1-heater body, 11-heater shell, 111-inner shell, 112-outer shell, 113-cooling chamber, 1131-cooling medium input port, 1132-cooling medium output port, 12-induction coil, 13-heat insulation layer, 14-graphite heating element, 141-airflow channel, 1411-air inlet, 1412-air outlet, 2-hot airflow utilization device, 3-airflow pressurization device and 4-switch valve.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, indicate an orientation or positional relationship only for convenience of description and simplicity of description, but do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
As shown in fig. 1, the present invention provides an airflow heating system, which includes a heater body 1, wherein the heater body 1 includes a heater housing 11, an induction coil 12, an insulating layer 13, and a graphite heating element 14; the induction coil 12 is arranged around the graphite heating element 14, and the heat-insulating layer 13 is arranged between the graphite heating element 14 and the induction coil 12; an air flow passage 141 is arranged in the graphite heating element 14, and the air flow passage 141 comprises an air inlet 1411 and an air outlet 1412.
In the system, the graphite heating body is heated by the induction coil 12, and in the working process, airflow to be heated flows into the airflow channel 141 in the graphite heating body 14 from the air inlet 1411, is heated to a high temperature in the airflow channel 141, and then flows out from the air outlet 1412. Because the melting point of the graphite heating element 14 is as high as 3500 ℃, the graphite heating element 14 can reach a very high self-heating temperature under the action of the induction coil 12, and can heat the air flow to 2000 ℃ or even higher. Meanwhile, in order to reduce heat loss of the graphite heating body 14, the heat insulation layer 13 is arranged between the graphite heating body 14 and the induction coil 12, and the heat insulation layer 13 locks heat in a heating area as much as possible, so that energy loss is reduced, and the heating efficiency of the airflow heating system is improved.
The invention can rapidly heat and raise the temperature of the graphite heating body 14 by matching the induction coil 12 with the graphite heating body 14, so that the graphite heating body can reach a high enough temperature, and the heating capacity of the equipment is not required to be improved by enlarging the volume of the equipment. Meanwhile, the induction coil 12 is arranged around the graphite heating body 14, so that the structure of the heater body 1 is more compact, the volume of the heater body 1 is reduced, and the occupied area of the heater body 1 is reduced.
Further, in order to prolong the heating time of the air flow in the graphite heat-generating body 14 and improve the heating efficiency of the present system, the air flow path 141 may be provided as a spiral path.
Furthermore, in order to prevent the operator from being injured by the excessively high temperature of the heater body 1, a cooling chamber 113 may be provided in the heating case. Specifically, the heater housing 11 includes an inner housing 111 and an outer housing 112 disposed outside the inner housing 111, and a cooling chamber 113 is enclosed between the inner housing 111 and the outer housing 112.
In the working process, a cooling medium can be injected into the cooling cavity 113, a large amount of waste heat is taken away through the cooling medium, the external temperature of the heater shell 11 is reduced, and the safety of the heater body 1 is improved.
Preferably, the lower end of the outer shell 112 is provided with a cooling medium inlet 1131, and the upper end of the outer shell 112 is provided with a cooling medium outlet 1132.
The cooling medium enters the cooling chamber 113 through the cooling medium input port 1131 and then flows out through the cooling medium output port 1132. Set up cooling medium input port 1131 and cooling medium delivery outlet 1132 at outer shell 112's lower extreme and upper end respectively, can guarantee to be full of cooling medium in the cooling chamber 113, realize higher cooling efficiency, make cooling chamber 113's cooling effect better.
Preferably, the airflow heating system provided by the invention further comprises a hot airflow utilization device 2, wherein one end of the hot airflow utilization device 2 is connected with the air outlet 1412, and the other end is connected with the air inlet 1411; the air flow heated by the heater body 1 enters the hot air flow utilization device 2 from the air inlet 1411 for heat exchange.
Further, an air flow pressurizing device 3 is arranged between the hot air flow utilization device 2 and the air inlet 1411, and the air flow pressurizing device 3 is used for pressurizing and accelerating the air flow.
After heat exchange is carried out on the gas to be heated through the gas flow channel 141, the gas enters the hot gas flow utilization device 2 to do work and be cooled, and then returns to the heater body 1 through the gas flow pressurizing device 3 to be heated, so that the whole cyclic heating process is realized.
Preferably, an on-off valve 4 is arranged between the airflow pressurizing device 3 and the air inlet 1411, and the on-off valve 4 is used for controlling the on-off of the airflow.
Preferably, a pressure regulating valve is provided between the air flow pressurizing device 3 and the air inlet 1411, and the pressure regulating valve is used for controlling the magnitude of the air flow.
Specifically, the pressure regulating valve is used for regulating the flow and the pressure of the air flow in the heater body 1, and in the working process, the valve opening of the pressure regulating valve can be regulated according to the actual use requirement, so that the flow and the size of the air flow entering the heater body 1 are regulated, and the heating process of the air flow is more stable and reliable.
Preferably, in order to further facilitate the pressure monitoring in the air flow channel 141, a pressure sensor is arranged in the air flow channel 141, and the pressure sensor is connected with the pressure regulating valve through an air pressure control circuit.
Preferably, the heater body 1 further includes a temperature control mechanism including a temperature sensor disposed at the air outlet 1412. The temperature control mechanism adjusts the heating temperature of the induction coil 12 in real time according to the temperature of the air flow detected by the temperature sensor, so that the heating process of the air flow is more stable and controllable.
Preferably, the heat-insulating layer 13 is one or more of alumina, magnesia, a carbon fiber felt layer, a graphite fiber felt layer, a carbon powder layer, a carbon particle layer and a carbon fiber short filament layer; and/or the induction coil 12 is any one or more of a tungsten coil, a molybdenum coil, a graphite coil and a carbon-carbon composite material coil.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts in the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An airflow heating system is characterized by comprising a heater body, wherein the heater body comprises a heater shell, an induction coil, a heat insulation layer and a graphite heating body;
the induction coil is arranged around the graphite heating body, and the heat insulation layer is arranged between the graphite heating body and the induction coil;
an airflow channel is arranged in the graphite heating body and comprises an air inlet and an air outlet.
2. The airflow heating system of claim 1 wherein said airflow passageway is a spiral passageway.
3. The airflow heating system of claim 1 wherein the heater housing includes an inner housing, and an outer housing disposed outside the inner housing,
and a cooling chamber is formed by enclosing the inner shell and the outer shell.
4. The airflow heating system of claim 3 wherein the lower end of the outer shell defines a cooling medium inlet and the upper end of the outer shell defines a cooling medium outlet.
5. The airflow heating system according to any one of claims 1 to 4, further comprising a hot airflow utilization device, one end of the hot airflow utilization device is connected with the air outlet, and the other end of the hot airflow utilization device is connected with the air inlet;
the air flow heated by the heater body enters the hot air flow utilization device from the air inlet to exchange heat.
6. The airflow heating system according to claim 5, wherein an airflow pressurizing device is further provided between the hot airflow utilization device and the air inlet,
the airflow pressurizing device is used for pressurizing and accelerating the airflow.
7. The airflow heating system according to claim 6, wherein a switch valve is arranged between the airflow pressurizing device and the air inlet, and the switch valve is used for controlling the on-off of the airflow.
8. The airflow heating system according to claim 6, wherein a pressure regulating valve is provided between said airflow pressurizing device and said air inlet, said pressure regulating valve being configured to control the magnitude of said airflow.
9. The airflow heating system according to claim 8, wherein a pressure sensor is arranged in the airflow channel, and the pressure sensor is connected with the pressure regulating valve through a pneumatic control circuit.
10. The airflow heating system of claim 1 wherein the heater body further comprises a temperature control mechanism including a temperature sensor disposed at the air outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011521357.6A CN112594928A (en) | 2020-12-21 | 2020-12-21 | Airflow heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011521357.6A CN112594928A (en) | 2020-12-21 | 2020-12-21 | Airflow heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112594928A true CN112594928A (en) | 2021-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011521357.6A Pending CN112594928A (en) | 2020-12-21 | 2020-12-21 | Airflow heating system |
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| CN (1) | CN112594928A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1111311B (en) * | 1958-07-31 | 1961-07-20 | Kuehnle Kopp Kausch Ag | Device for heating flowing media, preferably active gases or liquids, in which an electrically heatable, sealed graphite body has bores or channels for the passage of the gases or liquids |
| CN102703966A (en) * | 2012-05-28 | 2012-10-03 | 中国科学院力学研究所 | Device for growing carbonization silicon single crystal by using seed crystal temperature gradient method |
| CN203024400U (en) * | 2012-12-07 | 2013-06-26 | 李健 | Electro-magnetic induction high-temperature air-heating device |
| CN104501580A (en) * | 2014-12-01 | 2015-04-08 | 咸阳华光窑炉设备有限公司 | Electric-heating ultrahigh-temperature internal heating type rotary kiln |
| CN104555991A (en) * | 2013-10-22 | 2015-04-29 | 凯尔凯德新材料科技泰州有限公司 | Graphitization furnace with rapid cooling function |
| CN112050637A (en) * | 2020-07-29 | 2020-12-08 | 株洲红亚电热设备有限公司 | Energy-saving induction heating furnace |
-
2020
- 2020-12-21 CN CN202011521357.6A patent/CN112594928A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1111311B (en) * | 1958-07-31 | 1961-07-20 | Kuehnle Kopp Kausch Ag | Device for heating flowing media, preferably active gases or liquids, in which an electrically heatable, sealed graphite body has bores or channels for the passage of the gases or liquids |
| CN102703966A (en) * | 2012-05-28 | 2012-10-03 | 中国科学院力学研究所 | Device for growing carbonization silicon single crystal by using seed crystal temperature gradient method |
| CN203024400U (en) * | 2012-12-07 | 2013-06-26 | 李健 | Electro-magnetic induction high-temperature air-heating device |
| CN104555991A (en) * | 2013-10-22 | 2015-04-29 | 凯尔凯德新材料科技泰州有限公司 | Graphitization furnace with rapid cooling function |
| CN104501580A (en) * | 2014-12-01 | 2015-04-08 | 咸阳华光窑炉设备有限公司 | Electric-heating ultrahigh-temperature internal heating type rotary kiln |
| CN112050637A (en) * | 2020-07-29 | 2020-12-08 | 株洲红亚电热设备有限公司 | Energy-saving induction heating furnace |
Non-Patent Citations (1)
| Title |
|---|
| 银国柱: "《热气机》", 31 October 1982 * |
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Application publication date: 20210402 |