CN1158952A - Burner for combustion of liquid fuel - Google Patents

Abstract

This liquid fuel combustion device is provided with a burner case 9, an evaporating tube 1, evaporating liquid fuel supplied by a liquid fuel supplying means 12, a temperature detector 30, detecting the temperature of the evaporating tube 1, a burner head 20, having a plurality of flame ports 21 on the peripheral wall 20A thereof and mounted on the upper end opening of the evaporating tube 1, and a fan, supplying combustion air into the evaporating tube 1. The upper end unit of the evaporating tube 1 is provided with a plurality of heat recovering projections opposed to the peripheral wall unit of the burner head and increasing the temperature of lower part of the evaporating tube 1 to a vale not less than about 330 deg.C during combustion, integrally while the temperature detector is installed at the lower part of the evaporating tube. The evaporating tube is made from heat-resistant aluminum alloy which can be heated up to 450 DEG C.

Description

Burning apparatus for combustion of liquid fuel

The present invention relates to be mainly used in the oil gasification formula burning apparatus for combustion of liquid fuel of petroleum fan heater etc.

In the past, the structure of general this kind burning apparatus for combustion of liquid fuel is, in being arranged, the tubular burner shell at the end accommodating gasification pot with electric heater, in the upper end open portion of this gasification pot, the combustion head that has a plurality of glory holes on its perisporium is installed, supply liquid fuel and burning primary air in gasification pot, it is mixed with air, this mist is sent in the combustion head, and from each glory hole ejection of combustion head surrounding wall portion, the electric spark with spark lever ignites again.In addition, by the electric heater energising that is embedded in the gasification pot perisporium is heated, the flame heat that the glory hole of then burned head forms after the burning beginning is so stop the electric heater energising in the burning beginning after about 1 to 5 minute when the running beginning for gasification pot.After electric heater stopped power supply, can make gasification pot keep about 240～260 ℃ temperature by the heat of flame, thereby make liquid fuel continue gasification, burning is proceeded.

But, in above-mentioned burning apparatus for combustion of liquid fuel in the past, because its formation is to make the temperature of gasification pot be maintained at about 240～260 ℃ temperature, though can not appear at the problem that produces residual tar in the gasification pot when using the rotten JIS1 kerosene of selling in Japan, but if for example use because long preservation and rotten JIS1 kerosene, when perhaps using evaporating temperature than the high liquid fuel of JIS1 kerosene, will residual tar in the gasification pot, thus because of reducing, gasification performance can not carry out stable gasification, and combustion.

The present invention is in view of the above problems, even purpose is that to prevent that also tar is arranged when using the high liquid fuel of rotten kerosene or evaporating temperature in gasification pot residual, the long-term stability that keeps gasification performance, and raising detects the durability of the Temperature Detector of gasification pot temperature.

Formation of the present invention is, has burner shell, with the gasification pot that is housed in this burner shell, the liquid fuel by the supply of liquid fuel organization of supply is gasified, with the Temperature Detector that detects this gasification pot temperature, with have a plurality of glory holes on the surrounding wall portion, be installed in the upper end open portion of above-mentioned gasification pot combustion head and to the pressure fan of the inner supply of above-mentioned gasification pot combustion air; A plurality of opposed and in combustion process, can make the temperature of lower of above-mentioned gasification pot be warmed up to about recuperation of heat more than 330 ℃ protuberance for being provided with integratedly altogether with this upper end on the upper end of above-mentioned gasification pot with surrounding wall portion combustion head, and, the said temperature detector is located at the bottom of gasification pot.

The formation of the burning apparatus for combustion of liquid fuel that claim 2 is put down in writing is that gasification pot is made by being heated to about heat-resisting aluminium alloy more than 450 ℃.

Because it is a plurality of opposed for being provided with integratedly altogether with this upper end on the upper end of gasification pot with surrounding wall portion combustion head, and the temperature of lower that can make above-mentioned gasification pot in combustion process rises to the recuperation of heat protuberance more than 330 ℃, so after burning beginning through the combustion process behind the certain hour in, toasted gasification pot is arrived in warmed-up recuperation of heat with the thermal energy conduction of protuberance bottom by the flame high-temperature portion, make the temperature of gasification pot bottom can reach high temperature more than 330 ℃, even thereby it is residual in gasification pot to use rotten kerosene inferior or the high liquid fuel of evaporating temperature also can suppress tar, thereby can keep good vaporized state for a long time.In addition, because the said temperature detector is located at the bottom of gasification pot, Temperature Detector is on the position at the end of temperature in the gasification pot surrounding wall portion, thereby can improves durability.

Below briefly explain accompanying drawing.

Fig. 1 is the sectional drawing that the integral body of the burning apparatus for combustion of liquid fuel in the one embodiment of the invention constitutes.

Fig. 2 is the amplification profile diagram of the major part of burning apparatus for combustion of liquid fuel shown in Figure 1.

Fig. 3 is the major part amplification profile diagram on the section different with Fig. 2 of burning apparatus for combustion of liquid fuel shown in Figure 1.

Fig. 4 is the amplification plane cross section of the major part of burning apparatus for combustion of liquid fuel shown in Figure 1.

Fig. 5 is the oblique view of the gasification pot monomer of burning apparatus for combustion of liquid fuel shown in Figure 1.

Fig. 6 is the recuperation of heat that shows the glory hole of combustion head of burning apparatus for combustion of liquid fuel shown in Figure 1 and gasification pot with the figure that concerns between the protuberance.

Below in conjunction with Fig. 1 to Fig. 6 one embodiment of the present of invention are described.Among the figure, the 1st, the upper opening that die casting forms round-ended cylinder shape gasification pot arranged, gasification pot 1 is made by the heat-resisting aluminium alloy of aluminium manganese system, is provided with the air introducing port 2 to the tangential direction opening of above-mentioned surrounding wall portion on the part of the surrounding wall portion of this gasification pot 1.In addition, constituting the raw material heat-resisting aluminium alloy of gasification pot 1, is main component with aluminium, except that containing manganese, also contains silicon, iron, nickel, titanium, copper, magnesium etc., and wherein manganese content is 2.5～6.0 weight %, and content is maximum except aluminium.

The 3rd, be embedded in gasification pot 1 perisporium top, for example be the electric heater of protective sleeve type heater etc.; the 4th, the primary air tube that the air entrance hole 2 of an end and gasification pot 1 is connected; the housing 8 of its another end and pressure fan 7 is connected; described pressure fan 7 is equipped with the air-feeding ventilator 6 that drives by motor 5 in inside, send into above-mentioned gasification pot 1 inside with primary air by air introducing port 2 from the burning of pressure fan 7.9 be provided in a side of gasification pot 1 periphery the bottom tube-like burner shell arranged, the 10th, the space X that is used between burner shell 9 and gasification pot 1 is carried the auxiliary air pipe of burning with auxiliary air, the 10A of top export department of this auxiliary air pipe 10 has connected the surrounding wall portion 9A of burner 9, be revealed within the burner shell 9, and nearby opening at above-mentioned surrounding wall portion 9A, the cardinal extremity inlet portion 10B of auxiliary air pipe 10 is the same with primary air tube 4, also connects with the housing 8 of pressure fan 7.

The 11st, the air-supply guide that metallic plate is made, it is installed in the inner face of the surrounding wall portion 9A of burner shell 9 with the form of the 10A of top export department that covers above-mentioned auxiliary air pipe 10, this air-supply guide 11 keeps about interval of 5 to 10mm with the 10A of top export department of above-mentioned auxiliary air pipe 10, be installed in the inner face of the surrounding wall portion 9A of burner shell 9 with it opposed to each other, directly contact from the auxiliary air that the 10A of top export department of auxiliary air pipe 10 flows out preventing with the perisporium of gasification pot 1.

The 12nd, the fuel nozzle that within an end of air introducing port 2 and primary air tube 4, is provided with their concentric ground, the top ends of this fuel nozzle 12 is apparent within the gasification pot 1, be used for to liquid fuels such as gasification pot 1 inner ejection kerosene, its another end is by fuel supply pipe 13 and for example be the petrolift 14 of electromagnetic pump etc., with the internal communication of fuel tank 15.The 16th, to the cassette fuel tank that can freely load and unload of fuel tank 15 liquid make-up fuel.

The 17th, be entrenched in the choke block that the die casting on the upper opening of above-mentioned gasification pot 1 forms, this choke block 17 is the same with gasification pot 1, also be to make with the heat-resisting aluminium alloy of Al-Mn series, at the middle body of this choke block 17, be altogether the sagging cylindrical portion 17A that has formed as throttling path 18 integratedly with it.The 19th, be configured in the barrier plate of vertical lower of the cylindrical portion 17A of choke block 17, leave at interval between it and the cylindrical portion 17A.

20 are mounted in the covered cylinder shape combustion head on above-mentioned gasification pot 1 top, and as shown in Figure 6,3 sections are provided with a plurality of glory holes 21,21 that are used to spray mist about dividing on the surrounding wall portion 20A of this combustion head 20.In addition, inside and outside two sides and the surrounding wall portion 20A at the surrounding wall portion 20A of combustion head 20 is being provided with flame mesoporous metal net 22,22 with combining closely.The 23rd, be configured in mixed-rectification tube in the combustion head 20 with the form of the throttling path 18 that covers above-mentioned choke block 17 from the top, these mixed-rectification tube 23 usefulness heat-resistance stainless steel plates process through pull and stretch, observe from the side and be convex substantially, in the central the capping of the tube 23A of portion with cover that forms of part be provided with on the ring plain part 23B of its underpart periphery, a plurality of apertures 24,24 and 25,25 that diameter is set to about 2mm are being set respectively, and the surrounding wall portion of the tube 23A of portion with cover is an imperforate wall.In addition, a plurality of installation screws 26 of above-mentioned choke block 17, combustion head 20 and mixed-rectification tube 23 usefulness are fixed on the gasification pot 1.

The 27th, be configured in the fire ring of combustion head 20 peripheries, this fire ring 27 is made by the heat-resistance stainless steel plate, and mounting is in the upper end of gasification pot 1, and fixing with screw (scheming not shown).In addition, with the annular wall 27A of the opposed fire ring 27 of the surrounding wall portion 20A of combustion head 20 on, a plurality of longitudinal cuts 28,28 are being set with along the circumferential direction keeping certain intervals.

29, the 29th, 6 recuperation of heat protuberances opposed with the surrounding wall portion 20A of above-mentioned combustion head 20, that on the upper end of the surrounding wall portion of gasification pot 1, form by monolithic molding, as shown in Figure 5, these recuperations of heat form cylindric respectively with protuberance 29,29, the about 7mm of its diameter T, high H about 8 is to 10mm, along the circumferencial direction of the upper end of in the form of a ring gasification pot 1, be set to and keep having an appointment 25 to 35mm interval S about equally each other, can carry out recuperation of heat to gasification pot 1 effectively.By these a plurality of recuperations of heat are formed at the upper end of gasification pot 1 monolithic molding with protuberance 29,29, in combustion process, make the bottom wall portion of gasification pot 1 be heated to about 330～360 ℃ high temperature.

The 30th, be used to detect the Temperature Detector of the temperature of gasification pot 1, this Temperature Detector 30 is arranged at the bottom of gasification pot 1, with near the temperature the bottom wall portion that detects gasification pot 1, the top test section 30A that thermistor equitemperature detecting element is equipped with in inside is inserted in the transverse groove of bottom of the surrounding wall portion that is located at gasification pot 1, as shown in Figure 4, appropriate location therebetween is fixed on by fixture 31 on the surrounding wall portion 9A of burner shell 9.

In addition, be about Gai Tu film 32 of 20～40 μ m Tu of Nai Re films, 32 ， hot You Ji Tu Liao Tu is toasted behind the gasification pot inner face again and forms with Nai being formed with thickness on the whole inner face of cardinal principle of the surrounding wall portion of above-mentioned gasification pot 1 and bottom wall portion.

The 33rd, be used to detect the flame rod that the glory hole 21 of combustion head 20 has or not flames F exiting to form and detect oxygen concentration; The 34th, to the spark lever of lighting a fire from the mist of glory hole 21 ejections; The 35th, will guide the hot blast air supply duct of hot air blow port (scheming not shown) into the wind of pressure fan (scheming not shown) from hot blast; The 36th, erectly be located at the combustion barrel on the hot blast usefulness bottom wall portion 35A of air supply duct 35, the bottom in this combustion barrel 36 has above-mentioned combustion head 20 close with it; 37 are provided in a side of the filter in the combustion air inlet 38; The 39th, be used to detect the revolution detector of the revolution of air-feeding ventilator 6.

According to above formation, by making the temperature of lower of gasification pot 1 reach about 250 ℃ to electric heater 3 energisings, after the rising of said temperature was detected by Temperature Detector 30, pressure fan 7 just started, carry out the prepurging in about 5 seconds then, petrolift 14 startings after prepurging.Along with the starting of petrolift 14 and pressure fan 7, liquid fuel and burning are passed through fuel supply pipe 13 and primary air tube 4 respectively with primary air, and are fed to the inside of gasification pot 1 respectively from fuel nozzle 12 and air introducing port 2.

The fuel that is fed to gasification pot 1 inside is gasified behind the internal face that touches gasification pot 1, this gasifying gas with become mist after primary air mixes, this mist flows in the mixed-rectification tubes 23 by throttling path 18 backs of choke block 17.Flow to the mist in this mixed-rectification tube 23, wherein a part by a plurality of apertures 25,25 backs of the facial 23B of ring-shaped flat to the glory hole 21 of hypomere and glory hole 21 diffluences in stage casing, and from these glory holes 21,21 ejections; Remainder rises in the tube 23A of portion with cover, and flows to cap after quickening to mix in tube with cover portion 23, and a plurality of apertures 24,24 from cap pass through again.The mixed gas flow that has passed through above-mentioned a plurality of aperture 24,24 is to each glory hole 21 of epimere and each glory hole 21 in stage casing, again from these glory hole 21 ejections.Ignited by the electric spark of spark lever 34 from the mist of each glory hole 21 ejections, form flames F exiting, burning just begins like this.

On the other hand, flow out with the top export department 10A of auxiliary air through the burning that auxiliary air pipe 10 is delivered in the burner shell 9 from auxiliary air pipe 10, under the effect of air-supply guide 11, flow to horizontal, and enter in the space X between gasification pot 1 and the burner shell 9, in this space X, rise again, space between the top by gasification pot 1 and the top of burner shell 9 is fed to the periphery of flames F exiting, to promote the second-time burning of flames F exiting.

After taking fire as described above, the heat of flames F exiting is transmitted to gasification pot 1 from recuperation of heat with protuberance 29 and fire ring 27, to carry out recuperation of heat.During approximately through 2 to 5 minutes, even electric heater 3 is stopped energising, gasification pot 1 also can keep high temperature after burning beginning, thereby makes liquid fuel in the gasification pot 1 continue to be gasified and continues the maintenance fired state.In addition, begin through after 30 to 40 minutes from burning, near the temperature that temperature rises the bottom wall portion of the slowest gasification pot 1 also can reach about 330～360 ℃ condition of high temperature.

According to present embodiment, because on the upper end of the surrounding wall portion of gasification pot 1, form by monolithic molding and opposed 6 recuperations of heat of the surrounding wall portion 20A of combustion head 20 with protuberance 29,29, these recuperations of heat protuberance 29,29 are set to the about 7mm of diameter T, high H about 8 is to 10mm, after burning begins about 30 to 40 minutes, can make than near rise the temperature bottom wall portion of slow gasification pot 1 of upper temp and rise and keep about condition of high temperature of (330～360 ℃) more than 330 ℃, therefore, even use rotten kerosene inferior or the high liquid fuel of evaporating temperature, also can make the various compositions complete evaporation in moment in the fuel, thereby can prevent residual tar in the wall portion of gasification pot 1 inside, make the good vaporized state of the long-term maintenance of gasification pot, keep stable gasification, and combustion.And, be dipped into the meeting after stopping working of the interior liquid fuel of tar and continue evaporation and make generation strong odor when stopping working, but owing to the residual tar of wall portion that can prevent at gasification pot 1, thereby the problems referred to above are improved.

In addition, be equipped with in the test section 30A inside of Temperature Detector 30 and be used to thermistor that detects gasification pot 1 temperature etc., owing to this Temperature Detector 30 is arranged at the bottom of gasification pot 1, just this Temperature Detector 30 is located on the position that temperature is minimum in the surrounding wall portion of gasification pot 1, so can improve durability.In other words, when near the temperature bottom wall portion of gasification pot 1 rises to about more than 330 ℃ during the high temperature of (about 330～360 ℃), the temperature of the mid portion of gasification pot 1 surrounding wall portion will reach about about 400 ℃, and the temperature of the upper part of gasification pot 1 surrounding wall portion then reaches about about 450 ℃.If the heat resisting temperature of Temperature Detector 30 is about 360 ℃, so,, the durability of Temperature Detector 30 is had problems if resembling in the past Temperature Detector 30 is installed on the position more than the centre of gasification pot 1 surrounding wall portion.Therefore, Temperature Detector 30 is located at the bottom of gasification pot 1, just can not makes Temperature Detector 30 that faults such as broken strings take place.

In addition, because being used for the die casting gasification pot 1 of gasification liquid fuel is to be made by the heat-resisting aluminium alloy of Al-Mn series, content is that the manganese of 2.5～6.0 weight % can improve mechanical performances such as the hear resistance of aluminium and intensity, therefore, even the temperature temperature of the gasification pot upper end of easy rising rises to about about 450 ℃, can not produce thermal deformations such as bulging or fusing yet.

In addition, in the above-described embodiments, on the whole inner face of cardinal principle of the surrounding wall portion of gasification pot 1 and bottom wall portion, be formed with thickness and be about 20～40 μ m Tu of Nai Re films 32.Because with the thickness setting of this Tu of Nai Re film 32 is about 20～40 μ m, this can keep the permeability of liquid fuel Dui Tu film 32, again can Yi Zhi Tu film the surface temperature of the 32 heat-blocking action ， Shi Tu films 32 that produce identical substantially with the temperature of gasification pot 1, thereby improve the effect of the residual tar of inhibition.That is to say, reach more than the 50 μ m that the surface temperature that Na Me Tu film 32 itself will become heat-barrier material ， Shi Tu film 32 is lower than the temperature of gasification pot 1, therefore can suppress the gasification of liquid fuel as the thickness of Guo Shi Tu film 32.Thickness as Guo Shi Tu film 32 drops to below the 15 μ m, and the impregnability of liquid fuel will variation, turns granular fuel at gasification face and can produce and splash, thereby gasification is slowed down.

In sum, according to burning apparatus for combustion of liquid fuel of the present invention, since have on the upper end of the surrounding wall portion of gasification pot 1 with its altogether for being provided with a plurality of recuperation of heat protuberances integratedly, so that the temperature of gasification pot bottom rises to about formation more than 330 ℃, therefore, even use rotten kerosene inferior or the high liquid fuel of evaporating temperature, also can prevent at the inner residual tar of gasification pot, make the good vaporized state of the long-term maintenance of gasification pot, and can be suppressed at generation stink when stopping working, can not only improve the reliability when using the high liquid fuel of rotten kerosene inferior or evaporating temperature like this, and, be located at the bottom of gasification pot owing to will be used to detect the Temperature Detector of gasification pot temperature, thereby avoided Temperature Detector to be subjected to the temperatures involved of gasification pot, improved the durability of Temperature Detector.

In the burning apparatus for combustion of liquid fuel of in claim 2, putting down in writing, owing to be used for the gasification pot of gasification liquid fuel is to make with being heated to about heat-resisting aluminium alloy more than 450 ℃, so, even the temperature temperature on the gasification pot top of easy rising rises to approximately more than 450 ℃, thermal deformations such as bulging or fusing can not appear yet.

Claims (2)

1, a kind of burning apparatus for combustion of liquid fuel, it is characterized in that, comprise burner shell, with the gasification pot that is housed in this burner shell, the liquid fuel by the supply of liquid fuel organization of supply is gasified, with the Temperature Detector that detects this gasification pot temperature, with have a plurality of glory holes on the surrounding wall portion, be installed in the upper end open portion of above-mentioned gasification pot combustion head and to the pressure fan of the inner supply of above-mentioned gasification pot combustion air; A plurality of opposed and in combustion process, can make the temperature of lower of above-mentioned gasification pot be warmed up to about recuperation of heat more than 330 ℃ protuberance for being provided with integratedly altogether with this upper end on the upper end of above-mentioned gasification pot with surrounding wall portion combustion head, and, the said temperature detector is located at the bottom of gasification pot.

2, burning apparatus for combustion of liquid fuel as claimed in claim 1 is characterized in that, above-mentioned gasification pot is made by being heated to about heat-resisting aluminium alloy more than 450 ℃.

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