CN108072172A - A kind of direct-type efficient electric heater - Google Patents

A kind of direct-type efficient electric heater Download PDF

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Publication number
CN108072172A
CN108072172A CN201611007105.5A CN201611007105A CN108072172A CN 108072172 A CN108072172 A CN 108072172A CN 201611007105 A CN201611007105 A CN 201611007105A CN 108072172 A CN108072172 A CN 108072172A
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China
Prior art keywords
direct
heating
electric heater
outer barrel
efficient electric
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Application number
CN201611007105.5A
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Chinese (zh)
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CN108072172B (en
Inventor
程佳彪
张华芹
缪锦泉
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Shanghai Yun New Energy Science And Technology Ltd Co
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Shanghai Yun New Energy Science And Technology Ltd Co
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Priority to CN201611007105.5A priority Critical patent/CN108072172B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00Air heaters
    • F24H3/02Air heaters with forced circulation
    • F24H3/04Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00Details
    • F24H9/20Arrangement or mounting of control or safety devices
    • F24H9/2064Arrangement or mounting of control or safety devices for air heaters
    • F24H9/2071Arrangement or mounting of control or safety devices for air heaters using electrical energy supply

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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)
  • Resistance Heating (AREA)

Abstract

The invention discloses a kind of direct-type efficient electric heaters, including outer barrel, the rectifying cavity of the current stabilization chamber, heating chamber and the medium outflow that are flowed into it equipped with medium, fluid distributor is equipped in the rectifying cavity, heating component is equipped in the heating chamber, heat screen is equipped between the heating chamber and outer barrel inner wall, the outer barrel is equipped with electrode assembly, and the electrode assembly is connected with the heating component;It is a kind of direct-type heater using snakelike heating component structure.It after fluid media (medium) enters pipeline, is flowed through fluid distributor after one section of current stabilization chamber flows, then direct heat transfer is carried out in heating chamber, the medium after heat exchange travels further into next workshop section such as reactor using being flowed out after one section of rectifying cavity;Medium carries out direct heat transfer by heating component in heating chamber, and heat exchange efficiency is up to more than 95%, non-resistance, and the pressure loss is smaller;Heating component is required according to medium heating process, pollution-free, less scaling, heats efficient stable.

Description

A kind of direct-type efficient electric heater
Technical field
The present invention relates to electric heater field more particularly to a kind of direct-type efficient electric heaters.
Background technology
In many industrial process, the heating of gas medium is extremely important, especially for chemical process, it is often necessary to High temperature, high pressure, toxic, harmful, inflammable, explosive one or more mixed gas are heated to according to technological requirement by a constant temperature Degree, it is stringent to the control of temperature in order to ensure stablizing for reaction carries out and improve reaction conversion ratio.Meanwhile gas heating will also Accomplish homogeneous heating, good effect of heat exchange, heating element is unable to fouling in heating system, in order to avoid hot-spot, corrosion is even blown Heating element.
The principle of heating of conventional fluid electric heater is:Medium through pipeline, by electric heater container input end into Enter in the electric heater container equipped with tubular electrothermal element, existing general heating tube is common anti-corrosion pipe or curved spiral Pipe coil arrangement.For medium from during heating inside pipe wall flowing, electric heating wire conduction heats heating tube heat radiation, former by heat transfer Reason is realized carries out heat exchange to the medium in heating tube, belongs to indirectly heat, efficiency using low, by current density, apparent power and Heat transfer rate and heater volume influence, and realize that high pressure, high temperature, big flow, high-power electric heater difficulty are larger, and without It helps or even difficult to realize.It is traditional especially for having stronger corrosivity and be easy to the medium of fouling during heating Electric heater is used to the direct-fired mode of spiral heat exchange tube, causes frequent occurrence of equipment blocking and element in heating process Corrosion and damage, service life is short, increases enterprise operation cost.
The content of the invention
It is low in order to solve the efficiency of heating surface existing for coil pipe indirectly heat, it easily blocks and the problem of perishable, the service life is low, this hair It is bright to provide a kind of direct-type efficient electric heater.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that:
A kind of direct-type efficient electric heater, the direct-type efficient electric heater includes outer barrel, interior to be equipped with medium Current stabilization chamber, heating chamber and the rectifying cavity of medium outflow of inflow, the current stabilization intracavitary is equipped with fluid distributor, the heating chamber It is interior to be equipped with heating component, heat screen is equipped between the heating chamber and outer barrel inner wall, the outer barrel is equipped with electrode assembly, institute Electrode assembly is stated with the heating component to be connected.
According to one aspect of the present invention, the heating component is serpentine configuration heater.
According to one aspect of the present invention, the one side where the outer barrel current stabilization chamber is equipped with inlet interface flange.
According to one aspect of the present invention, the one side where the outer barrel rectifying cavity is equipped with discharge coupling flange.
According to one aspect of the present invention, the outer barrel is equipped with thermocouple nozzle, is equipped in the outer barrel several Temperature-detecting device, the temperature-detecting device pass through the external temperature control device of thermocouple nozzle.
According to one aspect of the present invention, the current stabilization cavity fluid is uniformly distributed through fluid distributor.
According to one aspect of the present invention, the electrode assembly includes electrode mounting cup, terminal box and earth-fault protection System.
According to one aspect of the present invention, the heating chamber is hollow structure.
According to one aspect of the present invention, the heat screen is attached admittedly by compressing spring support and outer barrel It is fixed.
According to one aspect of the present invention, the heating component is rodlike or banded structure heater.
The advantages of present invention is implemented:Direct-type efficient electric heater of the present invention, including outer barrel, interior be equipped with is situated between The rectifying cavity of current stabilization chamber, heating chamber and medium outflow that mass flow enters, the heating chamber are externally provided with heating component and fluid distrbution Device, between the heating chamber and outer barrel inner wall be equipped with heat screen, the outer barrel be equipped with electrode assembly, the electrode assembly with The heating component is connected;It is a kind of direct-type heater using snakelike heating component structure.Fluid media (medium) enter pipeline into It after mouth flange, is flowed through fluid distributor after one section of current stabilization chamber flows, then direct heat transfer is carried out in heating chamber, passed through Thermocouple and temperature sensor carry out monitoring temperature, and the medium after heat exchange after one section of rectifying cavity using flowing through outlet(discharge) flange surface current Go out, travel further into next workshop section such as reactor;Medium carries out direct heat transfer, heat exchange effect by the heating component in heating chamber Rate is up to more than 95%, non-resistance, and the pressure loss is smaller;Heating component is required according to medium heating process, pollution-free, is not easy to tie Dirt heats efficient stable.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for ability For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached Figure.
Fig. 1 is a kind of structure diagram of direct-type efficient electric heater of the present invention;
Fig. 2 is a kind of heating component structure diagram of direct-type efficient electric heater of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work Embodiment belongs to the scope of protection of the invention.
As depicted in figs. 1 and 2, a kind of direct-type efficient electric heater, the direct-type efficient electric heater include outer barrel Body 1, in the rectifying cavity 4 of current stabilization chamber 2, heating chamber 3 and medium outflow that is flowed into equipped with medium, be equipped in the current stabilization chamber 2 Fluid distributor 12, fluid is uniformly distributed through fluid distributor 12 in the current stabilization chamber 2, and heating group is equipped in the heating chamber 3 Heat screen 11 is equipped between 1 inner wall of heating chamber 3 described in part 9 and outer barrel, the outer barrel 1 is equipped with electrode assembly 10, the electricity Pole component 10 is connected with the heating component 9.
Wherein, the heating component 9 can be serpentine configuration.One side where the 1 current stabilization chamber of outer barrel 2 connects equipped with import Mouth flange 5.One side where 1 rectifying cavity of outer barrel 4 is equipped with discharge coupling flange 8.The outer barrel is equipped with thermocouple Nozzle 7.Several temperature-detecting devices are equipped in the outer barrel, the temperature-detecting device passes through the external temperature control of thermocouple nozzle Equipment.The electrode assembly includes electrode mounting cup, terminal box and ground-fault protection system.The heating component can also be stick Shape or banded structure.The heating chamber is hollow structure.The heat screen 11 by compress spring support 6 and outer barrel 1 into Row connection is fixed.
It in practical applications, can be as follows:
Outer barrel is pressure resistant vessel, and pressing force Vessel Design possesses the current stabilization chamber of medium inflow, a hollow heating The rectifying cavity that flows out after chamber and medium heating has inlet interface flange, multiple compression spring supports, thermoelectricity on outer barrel Even nozzle and discharge coupling flange.
In the heating chamber included in outer barrel, equipped with heating component, which has serpentine configuration, according to electrically matching somebody with somebody Requirement is put, general heating component is connected for three, i.e. the general three-phase for being connected respectively to power supply of heating component.The heating group Part is required according to medium heating process, generally using graphite, in the heating materials such as charcoal-charcoal is compound, silicon molybdenum, tungsten, nichrome It is a kind of.
Three-phase heating component is connected to the three-phase of power supply by three electrode assemblies, provides the work(from power supply to heater element Rate.Electrode assembly generally comprises electrode mounting cup, terminal box, ground-fault protection system etc., and electrode hood is prevented in surrounding them Personnel encounter power connection points by mistake;Terminal box is connected for sensor power with signal;Ground-fault protection system is used for detecting Whether internal heating component touches the earth fault of outer housing, other inner parts or power cord short circuit.
Be also equipped with cylinder type heat screen in cavity between outer housing and heating chamber, the main function of heat screen be every Heat, heat preservation and reduction heat loss.Metal material, metal coating layer material, graphite material can be used according to processing medium requirement in heat screen One kind in material.Heat screen is fixed on by the compression spring support of outer housing on outer barrel, provides the inside branch of heat screen Support, prevents that inner member rocks caused by media flow.
Head turbulent flow intracavitary is equipped with fluid distributor, for uniform fluid flow, more effectively exchanges heat.
Heater inlet, centre and outlet temperature are provided by thermocouple and temperature sensor to show, monitor temperature overheating Alarm and shutdown.
In actual work, operating pressure is 0.1~8MPa, and operating temperature is room temperature~1500 DEG C, output power 500 ~15000KW.
Three groups of snakelike heating components are connected respectively to the three-phase of power supply by three electrodes, meet medium by power regulation The requirement of outlet temperature.The features such as requirement of snakelike heating component material therefor is not easy to deform at high temperature, is rotten.According to work temperature Degree and gas medium property select heating material.Common material has carbon carbon composite, graphite material, nichrome etc.. The parameters such as type selecting, developed area and the perforate of heating component are by heater power, current density, apparent power, gas pressure, stream What the parametric synthesis such as amount, temperature determined.Electric heater output power is adjusted by power governor, passes through such control Heating object material temperature degree is more uniform.Multiple serial or parallel connections may be employed to reach technique purpose.Heater can vertically or water Safety fills.
In practical applications, the high power air heater of aviation field can be used in.Aero Engine Testing platform needs High-power, big flow air heater.
In actual use, horizontal or vertical installation generally can be used in heater.Design pressure is 5MPa, pressure-air from 50 DEG C are heated to 750 DEG C, and separate unit heating power is up to 15000kW.According to the present embodiment, gases at high pressure are from inlet flange into surely Chamber is flowed, is flowed through fluid distributor after one section of Stationary flow, then direct heat transfer is carried out in heating chamber, is directly changed Heat carries out monitoring temperature by thermocouple and temperature sensor, and the medium after heat exchange after rectifying cavity using flowing through outlet(discharge) flange Surface current goes out, for engine environmental simulation test.
In flow cavity and heating chamber that outer barrel includes, equipped with annular porous heating component, which has snakelike Structure, (calling snakelike heating component in the following text) requires according to electrical configurations, and using three-phase star-like connection, heating component is divided into three and is connected It connects, i.e. the general three-phase for being connected respectively to power supply of heating component.Snakelike heating component divides three-phase to pass through three electrode assemblies The three-phase of power supply is connected to, the power from power supply to heater element is provided.
The heating component is required according to air heating process, pollution-free, less scaling, and carbon-carbon composites can be used, add Hot efficient stable.
Be also equipped with cylinder type heat screen in cavity between outer housing and heating chamber, the main function of heat screen be every Heat, heat preservation and reduction heat loss.High temperature resistant stainless steel or nickel-bass alloy material can be used according to processing medium requirement in heat screen, protects Temperature is heat-insulated, protects pressure container cylinder.Heat screen is fixed on by the compression spring support of outer housing on outer barrel, provide every The inside support of heat shielding prevents that inner member rocks caused by mass flow air flows.
Head current stabilization intracavitary is equipped with fluid distributor, for uniform fluid flow, can more effectively exchange heat.
Heater electrode component generally comprises electrode mounting cup, terminal box, ground-fault protection system etc., and electrode hood is in electricity Around pole, prevent personnel from encountering power connection points by mistake;Terminal box is connected for sensor power with signal;Earth-fault protection system System is used for detecting the earth fault whether internal heating component touches outer housing, other inner parts or power cord short circuit.It is logical It crosses thermocouple and temperature sensor provides heater inlet, intermediate and outlet temperature is shown, monitoring temperature overheating is alarmed and shut down. By cable connection heater electricity grade and power supply, the power of electric heater is adjustable, the outlet according to heater in range Temperature carries out the power regulation on heater element.Control system can be configured to a controller while control two heaters, To maintain required outlet temperature.Air carries out direct heat transfer, avoids indirect by pipe directly through the cavity of heater Heat exchange, the efficiency of heating surface greatly improve.
1st, at least two are employed by outer layer barrel and interior heat screen structure, pressure-containing member pressing force Vessel Design is heat-insulated Screen protection temperature reduces thermal loss, can high temperature high voltage resistant.
2nd, medium direct heat transfer in heating chamber needs not move through coil pipe or pipe indirect heat exchange, and heat exchange efficiency is high, flowing Resistance is small, and less scaling and blocking, service life are long.
3rd, snakelike heating component uses special construction and material, and heating surface (area) (HS is big, and surface loading is high, thermal-stable.It (substitutes Scheme can use stick heating component) the compound high temperature heated materials of carbon carbon are the carbon-based bluk recombinations that carbon fiber and its fabric enhance Material.With low-density, high intensity, high ratio modulus, high-termal conductivity, low-expansion coefficient, frictional behaviour be good and thermal-shock resistance Can be good, dimensional stability is high the advantages that.
4th, cooperation stream design, media flow can be uniformly distributed, high efficient heat exchanging.
5th, three-phase electric control has electrode protection cover and terminal box, ground protection system, insulating part etc., safe.
6th, electric heater output power is adjusted by power governor, passes through such control heating object material temperature degree More uniformly.
The advantages of present invention is implemented:Direct-type efficient electric heater of the present invention, including outer barrel, interior be equipped with is situated between The rectifying cavity of current stabilization chamber, heating chamber and medium outflow that mass flow enters, the heating chamber are externally provided with heating component and fluid distrbution Device, between the heating chamber and outer barrel inner wall be equipped with heat screen, the outer barrel be equipped with electrode assembly, the electrode assembly with The heating component is connected;It is a kind of direct-type heater using snakelike heating component structure.Fluid media (medium) enter pipeline into It after mouth flange, is flowed through fluid distributor after one section of current stabilization chamber flows, then direct heat transfer is carried out in heating chamber, passed through Thermocouple and temperature sensor carry out monitoring temperature, and the medium after heat exchange after one section of rectifying cavity using flowing through outlet(discharge) flange surface current Go out, travel further into next workshop section such as reactor;Medium carries out direct heat transfer, heat exchange effect by the heating component in heating chamber Rate is up to more than 95%, non-resistance, and the pressure loss is smaller;Heating component is required according to air heating process, pollution-free, is not easy to tie Dirt heats efficient stable.At least two are employed by outer layer barrel and interior heat screen structure, pressure-containing member pressing force container is set Meter, heat screen heat preservation, reduces thermal loss, can high temperature high voltage resistant;Medium direct heat transfer in heating chamber, needs not move through coil pipe Or pipe indirect heat exchange, heat exchange efficiency is high, and flow resistance is small, and less scaling and blocking, service life are long;Snakelike heating component is adopted With special construction and material, heating surface (area) (HS is big, and surface loading is high, thermal-stable;Cooperation stream design, high efficient heat exchanging.
The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any Those skilled in the art is in technical scope disclosed by the invention, the change or replacement that can readily occur in, all should It is included within the scope of the present invention.Therefore, protection scope of the present invention should using the scope of the claims as It is accurate.

Claims (10)

1. a kind of direct-type efficient electric heater, which is characterized in that the direct-type efficient electric heater includes outer barrel, in The rectifying cavity of the current stabilization chamber, heating chamber and the medium outflow that are flowed into equipped with medium, the current stabilization intracavitary are equipped with fluid distributor, institute It states and heating component is equipped in heating chamber, heat screen is equipped between the heating chamber and outer barrel inner wall, the outer barrel is equipped with electricity Pole component, the electrode assembly are connected with the heating component.
2. direct-type efficient electric heater according to claim 1, which is characterized in that the heating component is serpentine configuration Heater.
3. direct-type efficient electric heater according to claim 1, which is characterized in where the outer barrel current stabilization chamber One side is equipped with inlet interface flange.
4. direct-type efficient electric heater according to claim 1, which is characterized in where the outer barrel rectifying cavity One side is equipped with discharge coupling flange.
5. direct-type efficient electric heater according to claim 1, which is characterized in that the outer barrel is equipped with thermocouple Nozzle, outer barrel is interior to be equipped with several temperature-detecting devices, and the temperature-detecting device passes through the external temperature control device of thermocouple nozzle.
6. direct-type efficient electric heater according to claim 1, which is characterized in that the current stabilization cavity fluid is through fluid Distributor is uniformly distributed.
7. direct-type efficient electric heater according to claim 1, which is characterized in that the electrode assembly is pacified including electrode Dress cover, terminal box and ground-fault protection system.
8. direct-type efficient electric heater according to claim 1, which is characterized in that the heating chamber is hollow structure.
9. the direct-type efficient electric heater according to one of claim 1 to 8, which is characterized in that the heat screen passes through Compression spring support is attached fixation with outer barrel.
10. direct-type efficient electric heater according to claim 9, which is characterized in that the heating component to be rodlike or Banded structure heater.
CN201611007105.5A 2016-11-16 2016-11-16 Direct high-efficient electric heater Active CN108072172B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201611007105.5A CN108072172B (en) 2016-11-16 2016-11-16 Direct high-efficient electric heater

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CN108072172A true CN108072172A (en) 2018-05-25
CN108072172B CN108072172B (en) 2024-04-16

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109631559A (en) * 2018-11-08 2019-04-16 太仓考斯茂石英有限公司 Gas heater is used in chip drying
CN110806009A (en) * 2019-11-01 2020-02-18 镇江东方电热有限公司 Heat insulation structure of heating core
CN113432295A (en) * 2021-06-09 2021-09-24 北京航空航天大学 Spiral high-flow ultrahigh-temperature air electric heater

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB673305A (en) * 1949-07-19 1952-06-04 Bataafsche Petroleum Improvements relating to apparatus for electrically heating a gas and the use thereof in the carrying out of gas reactions
CN101170845A (en) * 2007-11-27 2008-04-30 上海吴泾化工有限公司 Gas electrical heater
US20090304372A1 (en) * 2008-06-09 2009-12-10 Leister Process Technologies Electrical resistance heating element for a heating device for heating a flowing gaseous medium
CN202229413U (en) * 2011-09-20 2012-05-23 无锡博睿奥克电气有限公司 Impact resistant current-sharing device of electric heater
CN103968542A (en) * 2014-05-26 2014-08-06 西北工业大学 Small quick heater
CN104748371A (en) * 2015-03-23 2015-07-01 西北工业大学 Resistive heater used for engine combustion chamber experiment system
CN104819565A (en) * 2015-05-08 2015-08-05 江苏沙子电器有限公司 Electric heater structure for electric car
CN206514518U (en) * 2016-11-16 2017-09-22 上海韵申新能源科技有限公司 A kind of direct-type efficient electric heater

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB673305A (en) * 1949-07-19 1952-06-04 Bataafsche Petroleum Improvements relating to apparatus for electrically heating a gas and the use thereof in the carrying out of gas reactions
CN101170845A (en) * 2007-11-27 2008-04-30 上海吴泾化工有限公司 Gas electrical heater
US20090304372A1 (en) * 2008-06-09 2009-12-10 Leister Process Technologies Electrical resistance heating element for a heating device for heating a flowing gaseous medium
CN202229413U (en) * 2011-09-20 2012-05-23 无锡博睿奥克电气有限公司 Impact resistant current-sharing device of electric heater
CN103968542A (en) * 2014-05-26 2014-08-06 西北工业大学 Small quick heater
CN104748371A (en) * 2015-03-23 2015-07-01 西北工业大学 Resistive heater used for engine combustion chamber experiment system
CN104819565A (en) * 2015-05-08 2015-08-05 江苏沙子电器有限公司 Electric heater structure for electric car
CN206514518U (en) * 2016-11-16 2017-09-22 上海韵申新能源科技有限公司 A kind of direct-type efficient electric heater

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109631559A (en) * 2018-11-08 2019-04-16 太仓考斯茂石英有限公司 Gas heater is used in chip drying
CN110806009A (en) * 2019-11-01 2020-02-18 镇江东方电热有限公司 Heat insulation structure of heating core
CN113432295A (en) * 2021-06-09 2021-09-24 北京航空航天大学 Spiral high-flow ultrahigh-temperature air electric heater
CN113432295B (en) * 2021-06-09 2022-09-23 北京航空航天大学 Spiral high-flow ultrahigh-temperature air electric heater

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