CN1139745C - Fully premixed blast type monohole gas burner - Google Patents
Fully premixed blast type monohole gas burner Download PDFInfo
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- CN1139745C CN1139745C CNB021119147A CN02111914A CN1139745C CN 1139745 C CN1139745 C CN 1139745C CN B021119147 A CNB021119147 A CN B021119147A CN 02111914 A CN02111914 A CN 02111914A CN 1139745 C CN1139745 C CN 1139745C
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Abstract
The present invention relates to a fully premixed blowing type single hole gas burner. Low pressure gas is guided in an air outlet of a blower through an electromagnetic valve and a coal gas nozzle, one end of a mixing tube is connected with the outlet of the blower, and the other end of the mixing tube is connected with a sprayer with a flame stabilizing structure. Flame stabilizing small holes are uniformly arranged on the circumference of a main fire hole of the sprayer, an ignition flame stabilizing region is arranged between the periphery of the main fire hole and a combustion region of the main fire hole, and the ignition position of an ignition spark plug connected with one side of the sprayer is positioned in the ignition flame stabilizing region. The present invention is ignited by high pressure pulse electric sparks and depends on flame stabilizing flames to ignite main flames, an ignition system is simplified and operational reliability is improved. The present invention uses a fully premixed combustion mode of the gas under the condition of the blower, and has the advantages of high combustion efficiency, high heat intensity, short flames, no need of middle and high pressure coal gas and matched devices, low manufacture cost and convenient installation and maintenance.
Description
Technical field:
The present invention relates to a kind of gas burner, relate in particular to a kind of fully premixed blast type monohole gas burner, belong to fuel gas buring industrial technology field.
Background technology:
Industry fuel gas buring equipment commonly used has blowing-type diffusion burner and injection type (premix) burner.The thermic load of blowing-type diffusion burner is big, generally greater than 500,000 kilocalories/hour, its structure is made up of air blast, air register, coal gas current divider, shower nozzle and quirk etc.From textural branch, bushing type, spiral-flow type and flat flow blowing-type diffusion burner are arranged, structure is very complicated.Its principle is: air is supplied with by air blast, under the effect of air register, mixes with the coal gas that flows out from the coal gas current divider, and enters quirk or directly enter the burner hearth burning.The blowing-type diffusion burner can utilize low-pressure gas, can adapt to the malleation burner hearth, but do not have air and combustion gas premix process, in combustion process, combustion flame is Huang Yan, flame is long, the calorific intensity of shower nozzle unit are is low, and the mixed proportion of air and coal gas does not have self-regulating function, need be equipped with special-purpose quirk during installation, need specialized designs, and burning is insufficient during burning.Industrial injection type (premix) single hole burner thermic load does not have the thermic load of blowing-type diffusion burner big, be generally less than 100,000 kilocalories/hour, its structure is made up of gas-jet tube, injector and shower nozzle etc.Can be divided into two kinds by the flame characteristics, air suspended type and flameless.Its principle is: utilize the energy of middle and high compression ignite gas to suck the required part air of burning or whole air, mix in injector, enter the quirk burning through shower nozzle.Compare with the blowing-type diffusion burner, though the mixed proportion self-regulating function of air and coal gas is arranged, and do not need air blast, save power, its structure heaviness, thermic load generally can not excessive (2.3 * 10
5KW), inapplicable malleation burner hearth; Need middle and high compression ignite gas, the possibility that tempering takes place is in use arranged.In some industrial applications, need thermic load at present 4.0 * 10
5-2.0 * 10
6Single hole gas burner about kJ/h, and existing two kinds of above-mentioned industrial burners are difficult to satisfy this requirement, particularly goods have the occasion of specific (special) requirements to heating, do not allow directly to use coal or fuel Heating as some industrial product, influence Products Quality to prevent inner flue gas of the stove and dust.Present domestic this class burner production that also do not have.
Summary of the invention:
The objective of the invention is to above-mentioned deficiency at prior art, design provides a kind of fully premixed blast type monohole gas burner of new structure, be used for the heating of back yard industry equipment, thermic load snaps into greatly about 600,000 kilocalories 100,000, can replace miniature boiler and electric heating system, save and produce investment and energy cost.
For realizing such purpose, the characteristics of comprehensive injection type premix burner of the present invention and mechanical blowing type gas burner, adopt the fully premixed combustion system of blowing-type, low-pressure fuel gas by the induce one air outlet of air blast of magnetic valve and jet for gas, the wind of combustion gas and air blast is pre-mixed, after mixing tube is strengthened mixed effect, rely on the blast of air blast, premixed gas is delivered to spout with certain flow velocity, with high-voltage pulse spark ignition gas, intake and combustion gas and Air mixing ratio by special shower nozzle adjusting air blast are implemented in the fully premixed burning of combustion gas under the air blast condition.
Burning shower nozzle of the present invention has distinctive steady flame structure, evenly have steady flame aperture on the circumference of shower nozzle master fire hole, have a space to be the igniting flame-stabilizing area between main fire hole periphery and the main fire hole combustion zone, shower nozzle one side connects ignition spark plug, makes ignition location be positioned at the igniting flame-stabilizing area.
Air blast provides required air quantity of combustion gas premixed combustion and blast among the present invention, and shower nozzle master fire hole is regulated the mixing ratio of air and coal gas.Shower nozzle master fire hole diameter is the minimum diameter in the fluid transmission pipe, the convection current volume production is given birth to restriction, be equivalent to increase negative feedback links in the fluid transmission pipe, its feedback factor is the reducing resistance ζ of shower nozzle, reduce shower nozzle master fire hole diameter, just increased reducing resistance ζ, under the low pressure condition, shower nozzle effluent air flow correspondingly reduces.
Under the condition of blowing-type premixing fuel gas buring, can not consider the ventilation pressure loss of mixing tube, the pressure of shower nozzle place mist can be equal to the blast of air blast, and when shower nozzle master fire hole diameter reduced, the gas flow of shower nozzle master fire hole reduced.Concerning combustion gas, because the pressure height (5kpa) of input, and when fully premixed burning, the ratio that accounts for mist very little (about 3%), the influence that its flow is changed by shower nozzle master fire hole diameter can not considered, so the corresponding minimizing of the intake of air blast.Change the diameter of shower nozzle master fire hole, just can reduce the flow of air, thereby combustion gas and Air mixing ratio in the increase mist, promptly reduced the coefficient of excess air in the fuel gas buring process, choose suitable shower nozzle master fire hole diameter, just can obtain fully premixed flame, and unnecessary special blower fan or the voltage adjusting device chosen.
The present invention does not change air blast, as long as change the flow of input combustion gas, and correspondingly changes shower nozzle master fire hole diameter, the thermic load that just can regulate burner.When design, the calorific intensity of unnecessary consideration shower nozzle unit are.The calorific intensity of the unit are of shower nozzle depends on the blast of the air blast that combustion air is provided, and with regard to general general blower fan, blast is no more than 500Pa, and the calorific intensity of the unit are of shower nozzle does not influence the long-term use of shower nozzle.
Burner tip adopts distinctive steady flame structure among the present invention.Because the air velocity at shower nozzle master fire hole place is much larger than the burning velocity of combustion gas, burning can not continue to carry out, and shower nozzle adopts special steady flame structure, could guarantee the normal combustion of burner.Open a plurality of apertures around shower nozzle master fire hole, and, realize the steady flame effect of shower nozzle in space of the peripheral increase of main fire hole.By these apertures, pre-mixing gas combustion flows in the space of increase, because the expansion of area, this regional fuel gas flow speed significantly reduces (less than the burning velocity of combustion gas), adopt the high-voltage pulse spark ignition, ignition spark plug is installed on the shower nozzle, and ignition location is located in flame-stabilizing area, light the mist of flame-stabilizing area, rely on the flame of the flame-stabilizing area of lighting further to light the high speed pre-mixing gas combustion that main fire hole flows out.
The present invention adopts the high-voltage pulse spark ignition, and ignition spark plug is installed on the shower nozzle, and ignition location is located in flame-stabilizing area, lights the mist of flame-stabilizing area, and the flame of the flame-stabilizing area that dependence is lighted is further lighted the flame of main fire hole.Ignition spark plug can adopt general automobile engine spark plug, by screw thread spark plug is connected with shower nozzle.The needed ignition energy of lighting a fire is relevant with the gaseous mixture air velocity, and air velocity is fast more, and the ignition energy of requirement is high more, and the success rate that flame is lighted is low more.Adopt and light steady fireworks flame earlier, rely on steady fireworks flame to light the method for main flame then,, help to reduce the cost of burner, simplify the ignition system of burner, improve the functional reliability of burner with regard to unnecessary special use and the expensive burner igniter of adopting.
The present device investment is little, and general degree height is easy to installation and maintenance, need not supply middle and high pressure coal gas, need not build gas station or buy the liquefied petroleum gas vaporising device.
The present invention adopts fully premixed mode, the efficiency of combustion height, and calorific intensity is big, and flame is short.Burner hearth is not required, do not need quirk.In many industrial production, can be used as clean thermal source and replace electrical heating, as the stove that is heating and curing of plastic products.Be equipped with safety detection circuit (as the flame detection etc.) and simple sequential control, can realize full-automation.
Description of drawings:
Fig. 1 is the structural representation of burner of the present invention.
As shown in the figure, burner of the present invention comprises air blast 1, Gas Pipe assembly 2, magnetic valve 3, gas nozzle 4, mixing tube 5, spark plug 6 and shower nozzle 7.
Fig. 2 is the cross-sectional view of shower nozzle of the present invention
As shown in Figure 2, the connecting thread 10 that is connected with the burner mixing tube of diameter M1 is arranged on the nozzle body 7 of the present invention, the diameter of burner mixing tube is M1, have main fire hole 9 in the middle of the shower nozzle, the diameter of main fire hole 9 is D, on the circumference outside the main fire hole 9 diameter being arranged is the steady flame aperture 8 of d, is igniting flame-stabilizing area 12 between main fire hole 9 peripheries and the main fire hole combustion zone 11, and shower nozzle one side connects ignition spark plug 6.
The specific embodiment:
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described.
Burner structure of the present invention as shown in Figure 1, magnetic valve 3 is housed on the Gas Pipe assembly 2, the gas nozzle 4 that Gas Pipe assembly 2 one ends connect is connected on the exit of air blast 1, mixing tube 5 one ends are connected with air blast 1 outlet, the other end joins by screw thread and shower nozzle 7, and shower nozzle one side connects ignition spark plug 6.
Low-pressure fuel gas is introduced burner through magnetic valve 3, by the break-make of magnetic valve 3 control combustion gas, when burner operation, magnetic valve is opened, and the continuous supplied burner of combustion gas of pipeline input is when burner quits work or break down, close magnetic valve, disconnect gas supply.
Combustion gas is by being connected on 1/4 " gas nozzle 4 of pipe assembly 2 one ends, add in the exit of air blast 1.By the flow of gas nozzle 4 restriction combustion gas, the flow of the needed combustion gas of gas burner of different thermic loads (mark rice
3/ hour) difference; Under same thermic load condition, the flow of the combustion gas of the different calorific values that need is also different.Can regulate gas flow by being equipped with the gas nozzle of different-diameter, make burner reach the thermic load of regulation.
Air blast 1 adopts general general ventilation blower, and its nominal air delivery is greater than 2 times of completing combustion institute required airflow, and specified blast is about 500kpa.Combustion gas mixes with air in the exit of air blast 1.In when work, drive air blast earlier, treat (about 5 seconds) behind the blower fan working stability, open magnetic valve 3, feed combustion gas, prevent that combustion gas from flowing into air blast inside.
The main effect of mixing tube 5 is to make fully mixing of air and combustion gas.
Shower nozzle 7 has main fire hole, stable flame hole master combustion zone, structures such as high voltage pulse seed region, and shower nozzle works intake, the retention flame, igniting and the combustion of regulating air blast.
The present invention has unique steady flame structure for the specially designed supporting shower nozzle of burner.As shown in Figure 2, nozzle body 7 is connected with the burner mixing tube by connecting thread 10, have main fire hole 9 in the middle of the shower nozzle, evenly have eight steady flame apertures 8 on the circumference around shower nozzle master fire hole 9, space between main fire hole 9 peripheries and the main fire hole combustion zone 11 is igniting flame-stabilizing area 12, shower nozzle one side joint has ignition spark plug 6, and the ignition location of ignition spark plug 6 is positioned at igniting flame-stabilizing area 12.
The big I of the diameter D of the main fire hole 9 of shower nozzle is calculated definite according to the thermic load of burner, the kind of combustion gas, the blast of air blast and the combustion gas and the Air mixing ratio of specification requirement, its effect is under the situation that does not change the air blast blast, regulates the intake of air blast.Gaseous mixture air-flow by steady flame aperture 8 flows to igniting flame-stabilizing area 12, because the gas flow sectional area of igniting flame-stabilizing area 12 is much larger than the area of stable flame hole 8, the mixed airflow speed that flows out from stable flame hole 8 significantly reduces at igniting flame-stabilizing area 12, the air velocity at this place is less than the burning velocity of combustion gas, lighted by the electric spark of spark plug 6 easily, the smooth combustion in the zone of igniting flame-stabilizing area 12 of combustion gas simultaneously, and light the mist that flows out at a high speed from main fire hole 9.
In one embodiment of the invention, thermic load be 120,000 kilocalories/hour the major parameter of near gas burner as follows:
It is the CZR60 air blast that air blast 1 adopts model, and the nominal air delivery and the blast of this blower fan are respectively 4.5NM
3/ min and 539Pa.
The diameter of jet for gas 4 is at 3 50 kilograms cylinder for liquefied gas air feed in parallel after the decompression of YJ-5 pressure-reducing valve, and supply gas pressure H gets 7mm under the situation of 4.00kpa.
Shower nozzle master fire hole 9 diameter D get 35mm.The quantity of stable flame hole 8 is 8, and diameter d is got 3mm, and the air velocity of igniting flame-stabilizing area 12 is 0.5m/s.The air-flow average speed of main combustion zone 11 is 40m/s, and calorific intensity is 75kCal/mm
2During burning, combustion flame is a premixed flame, and the length of flame is approximately 600mm.
Burner of the present invention is integrated in the case of 600mm * 400mm * 500mm, adopts technology such as blowout protection and sequential control, fully automatic working.
Claims (3)
1, a kind of fully premixed blast type monohole gas burner, it is characterized in that Gas Pipe assembly (2) one ends that magnetic valve (3) is housed connect gas nozzle (4), low-pressure fuel gas is by magnetic valve (3) and jet for gas (4) air blast (1) air outlet that induces one, mixing tube (5) one ends are connected with air blast (1) outlet, the other end and shower nozzle (7) join, shower nozzle (7) one sides connect ignition spark plug (6), and the ignition location of spark plug is positioned at shower nozzle igniting flame-stabilizing area (12).
2, as the said fully premixed blast type monohole gas burner of claim 1, it is characterized in that having on the shower nozzle (7) screw thread (10) that is connected with the burner mixing tube, evenly have steady flame aperture (8) on the circumference around main fire hole (9) in the middle of the shower nozzle, between main fire hole (9) periphery and the main fire hole combustion zone (11) igniting flame-stabilizing area (12) is arranged.
3, as the said fully premixed blast type monohole gas burner of claim 1, the nominal air delivery that it is characterized in that air blast (1) is greater than 2 times of completing combustion institute required airflow, and specified blast is 500kpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021119147A CN1139745C (en) | 2002-06-03 | 2002-06-03 | Fully premixed blast type monohole gas burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021119147A CN1139745C (en) | 2002-06-03 | 2002-06-03 | Fully premixed blast type monohole gas burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1385646A CN1385646A (en) | 2002-12-18 |
| CN1139745C true CN1139745C (en) | 2004-02-25 |
Family
ID=4741806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021119147A Expired - Fee Related CN1139745C (en) | 2002-06-03 | 2002-06-03 | Fully premixed blast type monohole gas burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1139745C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718471A (en) * | 2009-12-16 | 2010-06-02 | 浙江力聚热水机有限公司 | Fully premixed gas type condensate vacuum hot-water machine unit |
| CN111810946A (en) * | 2019-04-10 | 2020-10-23 | 博联罗伊斯(苏州)工业设备制造有限公司 | Full premix combustor and control system thereof |
| CN114613222A (en) * | 2022-03-17 | 2022-06-10 | 中国舰船研究设计中心 | Dynamic flue gas environment simulation device |
-
2002
- 2002-06-03 CN CNB021119147A patent/CN1139745C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1385646A (en) | 2002-12-18 |
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