CN103017248A - Fuel gas infrared radiation heating device based on pulse combustion - Google Patents
Fuel gas infrared radiation heating device based on pulse combustion Download PDFInfo
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- CN103017248A CN103017248A CN201210540124XA CN201210540124A CN103017248A CN 103017248 A CN103017248 A CN 103017248A CN 201210540124X A CN201210540124X A CN 201210540124XA CN 201210540124 A CN201210540124 A CN 201210540124A CN 103017248 A CN103017248 A CN 103017248A
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Abstract
The invention discloses a fuel gas infrared radiation heating device based on pulse combustion. The fuel gas infrared radiation heating device based on the pulse combustion comprises a pulse combustor, wherein a tail pipe of the pulse combustor stretches into a radiation pipe; the exterior of the radiation pipe is provided with a reflecting cover; the pulse combustor comprises a shell; a combustion chamber is arranged in the shell; the front end of the shell is provided with a fuel gas inlet valve and an air inlet valve, which are communicated with the combustion chamber; the upper part of the shell is provided with a blowing fan communicated with the combustion chamber; a sparking plug is arranged in the combustion chamber; an exhaust port of the combustion chamber is provided with the tail pipe; the tail pipe stretches into the radiation pipe through the shell; and one side of the shell is provided with a controller electrically connected with the sparking plug, the blowing fan, the fuel gas inlet valve and the air inlet valve. The fuel gas infrared radiation heating device based on the pulse combustion is simple in structure and can improve the efficiency and the safety of fuel gas radiation heating in a large space, thereby being beneficial to energy conservation and emission reduction; and moreover, the working environment of staff in the large space is improved and the comfort degree is improved as well.
Description
Technical field
The present invention relates to a kind of heating plant, especially a kind of gas infrared radiation heating plant based on intermittent combustion.
Background technology
At present, the public building of some tall and big industrial premises and some large space, its building enclosure cold wind infiltration and cold wind intrusion heat consumption are all very large, if all adopt common radiator heating or hot-air heating, exist hot pressing function can cause energy waste serious, and heating effect is also bad.For this class building, adopting radiant heating is a kind of relatively preferably heating pattern, namely directly to being provided heat by the heating object, but not realizes heating by heating whole large space air, and energy-saving effect is remarkable.Specifically can be divided into electricity, hot water, steam, the radiation such as combustion gas, wherein commonly used with gas infrared radiation heating.The gas infrared radiation heating system mainly is made of following several parts: burner, radiant tube, air-introduced machine, reflecting plate, support or suspension hook, air-introduced machine and electric-control system.The burner that existing market is promoted mainly all is conventional stable state combustions, i.e. the parameters such as the pressure in the combustion chamber, temperature, flow velocity and rate of heat release temporal evolution not on macroscopic view; Radiant tube is aluminising or is sprayed with coating etc. to increase infrared intensity; The air-introduced machine effect is to guarantee that heating system keeps negative pressure, discharges combustion tail gas; The igniting of electric-control system guarantee combustion process, power regulation, combustion completion etc.
Research is found, there are a lot of shortcomings in the gas infrared radiation heating of this routine, as: (1) radiant tube Temperature Distribution is extremely inhomogeneous, burner outlet is that the arrival end temperature of radiant tube can reach 500 ~ 600 ℃, port of export temperature is about 100 ℃, and the serious inhomogeneities of radiant tube temperature causes in the heating room uneven in temperature.(2) the radiant tube tail end need add air-introduced machine, keeps combustion chamber and radiant tube negative pressure and gets rid of combustion product, and general air-introduced machine is contained in indoor, and consuming certain electric power and fan noise affects the office work environment.(3) it is insufficient that there is burning in ordinary burner, and efficiency of combustion is not high, and combustion product contains carbon monoxide and nitrogen oxide, has the danger of staff's anthracemia.
Chinese patent " Far infrared radiation heating apparatus [ZL03214192.0] ", Chinese patent " large space gas-fired radiant heating device [ZL200520078450.9] " and Chinese patent " gas-combustion type infra-red radiation bake heating plant [ZL03214192.0] " have all been set forth a kind of stable state oil and gas formula infrared radiation heating equipment and device based on ordinary burner, its characteristics are that burner is conventional stable state combustion, efficiency of combustion has the space of further lifting, combustion tail gas contains a large amount of imperfect combustion products such as carbon monoxide and nitrogen oxide, the tail gas of burner is used for heating and has certain danger in this case, and the radiant tube tail end need be established blower fan, increased power consumption on the one hand, another blower fan is located at the indoor ambient noise that causes.This is the drawback that this type of stable state combustion radiant heating can't overcome.
Chinese patent " the split type combustion control device [ZL03214192.0] of gas infrared radiation heating equipment " has only related to the control device of burner, it may be noted that, the control system of this type of burner there is no special feature, is present general Iganition control system.
Summary of the invention
The objective of the invention is for overcoming above-mentioned the deficiencies in the prior art, a kind of gas infrared radiation heating plant based on intermittent combustion is provided, this apparatus structure is simple, can improve efficient and the security of large space gas-fired radiant heating, be conducive to energy-saving and emission-reduction, and the interior personnel's of raising large space working environment, improve comfort level.
For achieving the above object, the present invention adopts following technical proposals:
A kind of gas infrared radiation heating plant based on intermittent combustion comprises pulsating combusting device, and the tail pipe of described pulsating combusting device extend in the radiant tube, and the radiant tube outside is provided with reflector.
Described pulsating combusting device comprises housing, be provided with the combustion chamber in the housing, the housing front end is provided with gas inlet valve and the air inlet valve that communicates with the combustion chamber, housing top is provided with the purging motor that communicates with the combustion chamber, be provided with spark plug in the combustion chamber, the exhaust outlet of combustion chamber is provided with tail pipe, and tail pipe passes housing and extend in the radiant tube, and housing one side is provided with the controller that is electrically connected with spark plug, purging motor, gas inlet valve and air inlet valve; The gas inlet house steward is connected with the gas inlet valve of combustion chamber by magnetic valve.During ignition trigger, purging motor work 5-10 is after second, magnetic valve is opened, the combustion gas total inlet pipe is opened, be full of combustion gas and air mixture in the combustion chamber, igniting takes fire, when burning occured, the combustion chamber inner volume expanded, under pressure automatic self-closing gas intake valve and air inlet valve, after burning is finished, gas valve and air valve are opened automatically, begin the combustion process of new circulation, produce thus a frequency one intermittent combustion process frequently, flue gas transfers to radiant tube after the burning under panting action simultaneously, forms the hot transmission course of pulsation.Magnetic valve is in normally open after igniting.
Described radiant tube is the thin-walled circular straighttube of diameter 80mm ~ 150mm, and the pipe outer wall is aluminising or is coated with one deck coatings capable of preventing from far infrared radiation that the coating material can high temperature resistant (reaching as high as 1000 ℃), and have intense radiation rate (0.95), and environment friendly and pollution-free.This coatings capable of preventing from far infrared radiation is existing product, and is all available on market.
Described reflector is the umbrella arc, and liner has the coating that can block thermal energy and have reverberation energy effect.
Described radiant tube places the umbrella arc focus place of reflector.
Described heating plant is provided with the environment temperature feedback device, and temperature sensor is located at by the heating target location, generally is near the workbench, when temperature is higher than setting value, feeds back in electric-control system, reduces the open degree of gas inlet valve, reduces heating power; On the contrary, if when temperature is lower than setting value, increase the open degree of gas inlet valve, increase heating power.
The gas infrared radiation heating plant hangs on apart from the about 3-5 rice of heating object At The Height, according to on-site actual situations support or suspension hook are set, with burner, radiant tube and reflector stable hang on design attitude, generally speaking, burner partly adopts support to fix, and radiant tube partly adopts suspension hook to hang, and two suspension hook spacings are advisable with 3 meters, play firm effect, guarantee without waving.
The present invention utilizes intermittent combustion and exhaust process can strengthen its turbulent extent, reduces the interface boundary layer thickness, thereby strengthened the caloic transfer rate in burning and the discharge air-flow, make medium generation resonant acoustic wave field in the reaction zone by the sound wave energy of exporting in the tail pipe, can further strengthen its caloic transmittance process.
Pulsating combusting device contains a combustion chamber, and the size of combustion chamber and type shape shape can be according to factor coordinate design such as heating space, installation sites, and relevant with ripple frequency, determined combustion intensity and heating power bracket.
Pulsating combusting device has the tail pipe that certain-length is arranged, its length and caliber are according to combustion intensity and ripple frequency coordinate design, tail pipe inserts in the radiant tube, high-temperature flue gas fraction by tailpipe returns to the radiant tube front end, most of flue gas is by pulse pneumatic force feed rear end to the radiant tube, the unfavorable factor of radiant tube front end excess Temperature when the normal burner radiant heating has been got rid of in the existence of tail pipe fully.
Radiant tube is the thin-walled circular straighttube of diameter 80mm ~ 150mm, length of tube can be adjusted according to heating space appropriateness, Commonly Used Size is that scope is 12 ~ 25m, the pipe outer wall is aluminising or is coated with one deck high-temp. far infrared energy-saving coatings, remain on far infrared, in infrared and each wave band of near-infrared very high infrared radiating light spectrum transmitted power is all arranged.
Reflector is the umbrella arc, and the coating that liner has thermal energy capable of blocking and has reverberation energy effect has large, the efficient advantages of higher of reflective surface area; Radiant tube places umbrella arc focus place during installation.
Suspension hook support plays the effects such as suspention and fixed combustion device, radiant tube, reflector.
Controller is the effects such as start and stop, safety device, power regulation of control panel type heating system.
Safety device in the controller, in the time of can guaranteeing the accidental truce situation of system, induced signal feeds back to the gas inlet system, and the automatic self-closing gas intake valve is avoided the accident generations such as gas leakage.
The present invention is not the comprehensive of simple several existing patents, the present invention utilizes pulsating combusting device to replace conventional stable state combustion device, its characteristics are not only to have utilized the sufficient combustion of pulsating combusting device own, the inert characteristics of combustion product, the pulse characteristics that are combustion tail gas more, so that flue gas forms air pulse in radiant tube, increased the turbulence intensity of combustion tail gas, flow boundary layer and the obvious attenuate of temperature boundary layer (with respect to the tail gas of stable state combustion) of mobile flue gas and radiant tube internal face, heat-transfer effect obviously improves, the simultaneously impulse action of itself can realize automatic vent, save air-introduced machine, reduce power consumption and noise pollution, the gas infrared radiation heating plant that therefore the present invention is based on intermittent combustion has obviously exceeded the simple superposition effect of " pulsating combusting device " and " conventional large space radiant heating " two kinds of patents.
The present invention utilizes pulsating combusting device to substitute conventional stable state combustion device, pulsating combusting device can utilize almost all fuel gas, such as multiple gases such as natural gas, liquefied petroleum gas, coal gas, propane, the pulsating combusting device efficiency of combustion is high, as long as excess air coefficient is slightly larger than 1.0, just can reaches and be similar to 100% efficiency of combustion.This advantage of excess air that need only be extremely low is large for power, combustion heavy oil and burning of coal device are particularly important, namely can save lower a large amount of air blast power consumption and equipment investment.
Intermittent combustion is the hugging process of one-period.Pulse combustion device utilizes the Sonic heat changing technology spontaneously to convert partial heat energy to acoustic energy, produces self-excitation, continual and steady pulsation.Thereby produce high temperature, higher-order of oscillation tail gas stream and strong sound wave energy, further quality, momentum and the heat transfer in overheavy firing and the discharge air-flow.This device utilizes intermittent combustion and exhaust process can strengthen its turbulent extent, reduces the interface boundary layer thickness, thereby strengthened the caloic transfer rate in burning and the discharge air-flow, make medium generation resonant acoustic wave field in the reaction zone by the sound wave energy of exporting in the tail pipe, can further strengthen its caloic transmittance process.
The invention has the beneficial effects as follows:
Pulsating combusting device is compared with traditional continuous combustion apparatus, has the combustion thermal efficiency height, combustion intensity is large, heat transfer coefficient is large, smoke-discharging pollution is little, pulse combustion device is simple in structure, volume is little, and has the characteristics of self-priming, spontaneous combustion and malleation exhaust.During with the work of gaseous fuel and liquid fuel, can be similar to and reach 100% efficiency of combustion.
In the pulsating combusting device distinctive strong gas greatly improved between fuel and the air, mixing between the combustion product of cold reactant and heat, heat transfer and mass transport process, thereby improved significantly the intensity of burning, combustion intensity can reach 58000kw/m
3More than, be tens times of stable state combustion.
In pulsating combusting device, the coefficient of overall heat transmission from the combustion product to the locular wall is also very high.Because pressure fluctuation and velocity fluctuation in the pulsating combusting device automatically provide strong forced-convection heat transfer, compare with the heat transfer free convection that in conventional stable state combustion device, usually exists, reach very high heat transfer intensity and heat exchange efficiency.Heat transfer intensity can reach 150kw/m
2, be the several times of stable state combustion.
The operation principle of pulsating combusting device has determined that it has the function of self-exhausting, can automatically discharge combustion product, and needn't as normal burner, discharge fume with air-introduced machine.Because the good heat transfer performance of pulsating combusting device and lower excess air characteristic, the delivery temperature at the burner outlet place can drop near environment temperature again, thereby makes its overall thermal efficiency bring up to 95% even higher level.
Pulsating combusting device mostly has self-suction function, namely do not need with the air blast function suck voluntarily fuel and for the burning air.
Use pulsating combusting device can reduce the discharge capacity (NO particularly of pollutant
X), the strong air flow pulsation in the pulsating combusting device has improved the mixed process in the burner, has reached very high combustion rate, has also just reduced in the combustion product the not growing amount of the content of the hydrocarbon of burning-out, flue dust and CO.When therefore being used for heating system, safe.
Pulsating combusting device simple in structure, volume is little, almost do not have movable part, therefore investment of production and cheap for manufacturing cost is highly suitable for the large space Gas-fired Radiant Heating.
The pulsating combusting device fuel tolerance is wide, and all fuel gas all can be used as the fuel of pulsating combusting device basically.
The superiority of intermittent combustion is far above the shown advantage that goes out of pulsating combusting device itself.Pulsating Combustion Technology is applied to gas-fired radiant heating, because the effect of the strong pulse pneumatic of pulsating combusting device outlet will improve burning situation, strengthen heat transfer, mass transfer and mixing (Momentum Transfer) process in the radiant tube, improve work efficiency, reduced energy resource consumption.Proposition of the present invention with greatly improving efficient and the security of large space gas-fired radiant heating, is conducive to energy-saving and emission-reduction, and improves the working environment of personnel in the large space, improves comfort level.
Description of drawings
Fig. 1 is structural representation of the present invention;
1-pulsating combusting device wherein, 2-controller, 3-tail pipe, 4-radiant tube, 5-reflector, 6-combustion chamber, 7-gas inlet valve, 8-air inlet valve, 9-purging motor.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
As shown in Figure 1, the gas infrared radiation heating plant based on intermittent combustion comprises pulsating combusting device 1, and the tail pipe 3 of described pulsating combusting device 1 extend in the radiant tube 4, and radiant tube 4 outsides are provided with reflector 5.
Pulsating combusting device 1 comprises housing, be provided with combustion chamber 6 in the housing, the housing front end is provided with gas inlet valve 7 and the air inlet valve 8 that communicates with combustion chamber 6, housing top is provided with the purging motor 9 that communicates with combustion chamber 6, be provided with spark plug in the combustion chamber 6, the exhaust outlet of combustion chamber 6 is provided with tail pipe 3, and tail pipe 3 passes housing and extend in the radiant tube 4, and housing one side is provided with the controller 2 that is electrically connected with spark plug, purging motor 9, gas inlet valve 7 and air inlet valve 8.（
The gas inlet house steward is connected with the gas inlet valve of combustion chamber by magnetic valve.During ignition trigger, purging motor work 5-10 is after second, magnetic valve is opened, the combustion gas total inlet pipe is opened, be full of combustion gas and air mixture in the combustion chamber, igniting takes fire, when burning occured, the combustion chamber inner volume expanded, under pressure automatic self-closing gas intake valve and air inlet valve, after burning is finished, gas valve and air valve are opened automatically, begin the combustion process of new circulation, produce thus a frequency one intermittent combustion process frequently, flue gas transfers to radiant tube after the burning under panting action simultaneously, forms the hot transmission course of pulsation.Magnetic valve is in normally open after igniting.
Described heating plant is provided with the environment temperature feedback device, and temperature sensor is located at by the heating target location, generally is near the workbench, when temperature is higher than setting value, feeds back in electric-control system, reduces the open degree of gas inlet valve, reduces heating power; On the contrary, if when temperature is lower than setting value, increase the open degree of gas inlet valve, increase heating power.
The gas infrared radiation heating plant hangs on apart from the about 3-5 rice of heating object At The Height, according to on-site actual situations support or suspension hook are set, with burner, radiant tube and reflector stable hang on design attitude, generally speaking, burner partly adopts support to fix, and radiant tube partly adopts suspension hook to hang, and two suspension hook spacings are advisable with 3 meters, play firm effect, guarantee without waving.
Purging motor 9 starts, air inlet valve 8 and gas inlet valve 7 are opened under suction function, be full of the mixture of fuel gas and air in the combustion chamber 6, controller 2 starting ignition devices, pulsating combusting device 1 is started working, combustion product is in tail pipe 3 drains into radiant tube 4, it is out of service that the first frequently intermittent combustion finishes post-purge blower fan 5, fuel is under pulsating combusting device 1 panting action own, automatically open, close gas inlet valve 7 and air inlet valve 8, combustion gas in the combustion chamber 6 and the mist of air begin the deflagration of the second frequency under combustion chamber 6 high temperature or tail pipe 3 ember effects, and so forth.
The indoor environment temperature sensing device feeds back the controller 2 in pulsating combusting device 1, but according to the height adjustment gas inlet valve 7 of temperature index and the open degree of air inlet valve 8, adjusts the watt level of pulsating combusting device 1, and then keep by the temperature of heating zone.
When radiant tube 4 is installed with reflector 5, guarantee that radiant tube 4 is positioned at the focal position of reflector 5, realizes to greatest extent reflecting effect.
Intermittent combustion infrared radiation heating system among the present invention does not establish exhaust blower, reduce power consumption and fan noise, purging motor 9 only starts when lighting a fire for the first time, relies on pulsating combusting device self ripple frequency, and combustion product is rhythmical, pulsation transfers to radiant tube 4 tail ends and discharges.
Although above-mentionedly by reference to the accompanying drawings the specific embodiment of the present invention is described; but be not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (5)
1. the gas infrared radiation heating plant based on intermittent combustion is characterized in that, comprise pulsating combusting device, the tail pipe of described pulsating combusting device extend in the radiant tube, and the radiant tube outside is provided with reflector.
2. device as claimed in claim 1, it is characterized in that, described pulsating combusting device comprises housing, be provided with the combustion chamber in the housing, the housing front end is provided with gas inlet valve and the air inlet valve that communicates with the combustion chamber, and housing top is provided with the purging motor that communicates with the combustion chamber, be provided with spark plug in the combustion chamber, the exhaust outlet of combustion chamber is provided with tail pipe, and tail pipe passes housing and extend in the radiant tube, and housing one side is provided with the controller that is electrically connected with spark plug, purging motor, gas inlet valve and air inlet valve.
3. device as claimed in claim 1 is characterized in that, described radiant tube is the thin-walled circular straighttube of diameter 80mm ~ 150mm, and the pipe outer wall is aluminising or is coated with one deck high-temp. far infrared energy-saving coatings.
4. device as claimed in claim 1 is characterized in that, described reflector is the umbrella arc, and liner has the coating that can block thermal energy and have reverberation energy effect.
5. device as claimed in claim 4 is characterized in that, described radiant tube places the umbrella arc focus place of reflector.
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| CN201210540124XA CN103017248A (en) | 2012-12-13 | 2012-12-13 | Fuel gas infrared radiation heating device based on pulse combustion |
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| CN201210540124XA CN103017248A (en) | 2012-12-13 | 2012-12-13 | Fuel gas infrared radiation heating device based on pulse combustion |
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| CN103017248A true CN103017248A (en) | 2013-04-03 |
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| CN201210540124XA Pending CN103017248A (en) | 2012-12-13 | 2012-12-13 | Fuel gas infrared radiation heating device based on pulse combustion |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104110951A (en) * | 2014-07-01 | 2014-10-22 | 太原钢铁(集团)有限公司 | Mineral powder drying method and drying device |
| CN110793142A (en) * | 2019-10-14 | 2020-02-14 | 天津大学 | Column-following distributed ventilation heating system and method for high-pollution oil mist emission factory building |
| CN110822427A (en) * | 2019-11-25 | 2020-02-21 | 衡阳凯新特种材料科技有限公司 | Silicon nitride radiant tube |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104110951A (en) * | 2014-07-01 | 2014-10-22 | 太原钢铁(集团)有限公司 | Mineral powder drying method and drying device |
| CN104110951B (en) * | 2014-07-01 | 2016-04-27 | 太原钢铁(集团)有限公司 | A kind of furnace drying method of breeze |
| CN110793142A (en) * | 2019-10-14 | 2020-02-14 | 天津大学 | Column-following distributed ventilation heating system and method for high-pollution oil mist emission factory building |
| CN110822427A (en) * | 2019-11-25 | 2020-02-21 | 衡阳凯新特种材料科技有限公司 | Silicon nitride radiant tube |
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Application publication date: 20130403 |