CN1800710A - Jet and oxygen-enriched combustion method for gas fuel and burner therefor - Google Patents
Jet and oxygen-enriched combustion method for gas fuel and burner therefor Download PDFInfo
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- CN1800710A CN1800710A CNA2006100201538A CN200610020153A CN1800710A CN 1800710 A CN1800710 A CN 1800710A CN A2006100201538 A CNA2006100201538 A CN A2006100201538A CN 200610020153 A CN200610020153 A CN 200610020153A CN 1800710 A CN1800710 A CN 1800710A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The invention can utilize the pressure and ejection characters of gas fuel, and the burning energy to arrange the nozzle, ejector and ejection pipe in one axes. The ends of nozzle and the ejection pipe are fixed, while the ejector can axially move in middle stroke. The invention discloses a gas fuel ejection rich-oxygen burner for using ejection rich-oxygen burning method, to combine the nozzle, ejector, and ejection pipe burning room into one ejection rich-oxygen burner. The nozzle is designed as micro-ejection pipe; the ejector is designed as high-efficiency mixed non-stepped speed changer; the ejection pipe burning room has a multifunctional device, while they individually form the lower, middle, and higher temperature burning section. The invention can realize the fire temperature control of fire outlet and transforming the layer burning into whorl burning, which has 100% improved heat efficiency and reduced burning cost than traditional burning method.
Description
(1) technical field:
The present invention relates to the new combustion method of gaseous fuel field fluidics, the spy is named as the jet oxygen-enriched combusting method, and the present invention also will openly realize the gaseous fuel jet oxygen-enriched burner of this method.
(2) background technology:
Gaseous fuel and oxygen mix reach after certain ratio could ignition, and the supply of oxygen comprises airborne oxygen and the pure oxygen in high pressure of making especially.The method of gas fuel combustion is generally two kinds, a kind of is the mixed combustion mode, burning again after promptly utilizing own pressure of gaseous fuel and air to mix earlier, the shortcoming of this combustion system be long flow path, structure complicated, can not organize high-temp combustion, do not reach due temperature, cause energy waste.Second kind is the mechanical mixture combustion system, promptly extrudes the gaseous fuel air-flow mixed combustion of high pressure draught or hyperbaric oxygen entraining air stream suction low pressure by air compressor, and this combustion system can be organized high-temp combustion, but has increased the burning cost.
Before understanding the present invention, at first the notion of playpipe, injector, Reynolds number, laminar flow, eddy current, jet is had gained some understanding, define on the textbook:
The gas of playpipe---high-speed motion drives another kind of low-speed motion (or static) gas, makes the latter increase certain energy, so that overcome the resistance in flowing, and it is travelled forward together with high-speed gas.
Injector---on the basis of playpipe, shrink afterwards earlier and expand, increased useful work.
The Reynolds standard is counted Re, and: general Re＜2300 o'clock is a laminar flow;
Re＞2300 o'clock are eddy current;
Under the specific condition: flow velocity is more little, and Re is just more little, thereby caliber is big, and flow velocity is little to be eddy current.
Jet---with the different places of fluid, be exactly that it has a branch of mobile characteristics that are injected into.
------is a noun in this specification, and " playpipe combustion chamber " expression has conversion and control two parts function to flame, and " playpipe " do not contain the control section function in the playpipe combustion chamber.
(3) summary of the invention:
In theory, the burning that often runs in the human daily life roughly is divided into three kinds: general burning, high-temp combustion, instant burning, and general burning wastes energy, and causes environmental pollution; The instant burning produces blast, causes immeasurable loss; And high-temp combustion is only the target that the mankind dream of.
Theoretical definition of the present invention: utilize gaseous fuel own pressure, jet to be injected into a branch of mobile characteristics, the energy that burning produces, the cross-sectional area of nozzle, injector, playpipe open type successively be placed on the same axis, the nozzle and the playpipe at two are fixed, middle injector can move axially in prescribed stroke, setting up the jet combustion technical schematic diagram, is organic whole between the three, is the relation of an indivisible chain.
Core technology of the present invention is the laminar combustion that successfully injection device is ejected, and converts swirl combustion to by spraying pipe fitting, thereby has realized the high-temp combustion of gaseous fuel fluidics.
Key technology of the present invention is the energy that gaseous fuel is produced, and by regulating the size of injection device volume N, becomes and moves its distance back and forth on axis, reaches to change injection device outlet cross-sectional area f
2On flow velocity W
2With flow V
2, satisfy playpipe cross-sectional area f
3On flow velocity W
3With flow V
3Requirement.
Structure technology definition of the present invention: utilize the own pressure of gaseous fuel, jet is injected into a branch of mobile characteristics, the energy that burning produces, nozzle member, injection device, spray the equipment of pipe fitting, be placed on to open type on the same axis successively, nozzle member and injection pipe fitting are fixed on two, injection device can move axially in predetermined stroke back and forth in the centre, formed the jet oxygen-enriched burner, it between the three organic whole, it is the relation of a chain, successfully carry out the pressure energy of gaseous fuel, kinetic energy, heat energy is changed mutually, laminar combustion is converted to swirl combustion, thereby the high-temp combustion of gaseous fuel and the regulation and control of flame temperature have been realized, jet oxygen-enriched combusting new technology that must any additionaling power.
Most important theories of the present invention is the cross-sectional area with tangible nozzle member, injection device, injection pipe fitting, sets up the new theory of gaseous fuel jet combustion know-why Fig. 1 and jet combustion technology.Carry out concrete research and analysis below.Analyze for convenience, suppose have only pressure P among combustion process Fig. 1, cross-sectional area f, flow velocity W, four amounts of theoretical combustion product amount V, set up the flow equation formula of nozzle member, injection device, injection pipe fitting, the theory of combustion of concrete analysis jet combustion technology.
1, the f of the nozzle member among Fig. 1
1With the f that sprays pipe fitting
3Be fixture, the f of the injection device in the middle of being placed on
2Can axially move around, be open type between them, is full of air in the space.
2, the small arrow place among Fig. 1 represents f respectively
1, f
2, f
3Cross-sectional area, f
1, f
2, f
3Be directly proportional with flow, rule of thumb, following relational expression arranged between the three:
f
2=77f
1Formula (I)
f
3=1320f
1Formula (II)
F in the formula
1Be to decide according to producing required calorific capacity size; Then f
1Substitution formula (I) is obtained f
2Again f
1Substitution formula (II) is calculated f
3f
2=77f
1Obtain under certain condition, in practice, f
2Also be a variable, f
2With cooperating of volume N and adjustment stroke, could satisfy W
2Instructions for use.
3, nozzle member is represented the space that gaseous fuel mixes with air to the inlet of injection device and the conicity angles alpha place of spraying the pipe fitting inlet that exports to of injection device among Fig. 1, represents that simultaneously the diffusion taper angle of jet a fluid stream is generally less than 20 °.
4, the calculating of injector volume N:
Rule of thumb, the long-pending f in injector volume N and nozzle throat area
1The relation that exists is as follows:
N＞400×n；
N and f in the formula
1Relation:
f
1＝0，n＝0；f
1＝0.1，n＝1；
f
1＝0.2，n＝2；f
1＝0.3，n＝3；.......。
Above n value and the like, as long as the long-pending f in selected nozzle throat area
1, obtain the n value, the substitution following formula just can be obtained the N value, and the N value is along with f
1Increase and reduce f
2Reduce and increase.The injector volume is preferably cylindrical.
5, when P equals constant, f
1, f
2, f
3The flow equation formula at place is as follows:
V
1=f
1W
1Perhaps V
1=Pf
1It is nozzle flow;
V
2=f
2W
2It is the injector rate of discharge;
V
3=f
3W
3It is the playpipe flow;
With the f in the following formula
1, f
2, f
3Be to calculate according to the relational expression in 2, P is a constant, V
1, W
1, V
3, W
3All be constant, remaining variable has only V
2, W
2
6, V
2, W
2Relation with crater flame profile, temperature:
The crater flame profile is wide and lack, and illustrates that flame is in high-temp combustion, and short and thick strong, and temperature is high more, and flow velocity is accelerated, and active force strengthens.
The crater flame profile is narrow and grow, and flame is in imperfect combustion, and length is long more, and color is red more, and temperature is low more.
V
2, W
2Purposes: in design, work as f
1After determining, f
2, f
3Determine W
3, V
3Also corresponding definite.Because structure needs and the error of design, must change V
2, W
2Satisfy V
3, W
3Requirement, laminar combustion is converted to swirl combustion, reach best flame temperature simultaneously.
7, the adjustment method of crater flame profile, temperature:
The flame that ejects from playpipe combustion chamber crater when flame is wide and lack, and drone make a sound, illustrate that design is reasonably, W
2Convert W to
3, V
2Convert V to
3It is the high-temp combustion condition that meets jet combustion.
Growing if the flame that ejects from playpipe combustion chamber crater is narrow, is laminar combustion, and the oxygen-supplying amount deficiency is described, injector is moved toward nozzle, reduces the volume N of injector, improves W
2Flow velocity, increase V
2Flow; When combustible gas stream once more from f
2Be ejected into f
3The time, meet the specific condition of reynolds number Re, convert swirl combustion to by laminar combustion, if once not all right, repeat for several times, wide and lack up to the crater flame profile.
If the f of playpipe combustion chamber
3Rear wall firing chamber volume is less than normal, and resistance is also little, W
3Flow velocity when very fast, will produce and take off fire, lose control of burned flame, move injector this moment toward the playpipe combustion chamber, increase the volume N of injector, reduces W
2Flow velocity, reduce V
2Flow, when combustible gas stream again from f
2Be ejected into f
3The time, satisfy W
3, V
3Requirement, reach the jet oxygen-enriched combusting.If not all right, the same repetition for several times, wide and lack up to the crater flame profile.
Special needs to be pointed out is: improve W
2Flow velocity, just equal to increase the useful work of injector, just equal to increase oxygen-supplying amount, just equal to improve flame temperature.Therefore correspondingly with it be: increase f
3The volume of rear wall firing chamber increases f
3The resistance of back crater has maximally utilised this technology, as sets up burner hearth, fires from the side, and the center fires and adds back taper cover or the like
Because there is huge energy in the gaseous fuel jet combustion, the distance that injector moves is very little, just can change W
2And V
2, Here it is power producer of the present invention calculates complicated jet combustion simultaneously and becomes simple " addition and subtraction ", has formed key technology of the present invention.
8, constant W
1Effect:
The front is to W
2, W
3Many argumentations have been done, as W
1Do not have great use, actually this is not so, W
1Be only difficult point of the present invention, because it does not have heat energy utilization.If f
1Be that constant, P are constant, W
1It also is constant.Work as W
1When very little, very poor with Air mixing, jet belongs to anoxycausis.
Gaseous fuel jet oxygen-enriched burner according to the method for gaseous fuel jet oxygen-enriched combusting is made comprises connector, seal, nozzle, injector, adapter sleeve, playpipe combustion chamber, holding screw.Be provided with the internal thread hole that communicates with source of the gas in the end face of connector in the heart, be shaped on external screw thread on the circumference of this end face.Nozzle is the barred body that has regular polygon cylinder step, be shaped on external screw thread on the barred body of the top and the bottom of cylinder step, from top, the axle center of barred body is provided with the big axis core hole, its length surpasses the cylinder step, be communicated with little axle center hole down, inwardly offer the through hole that communicates with the big axis core hole on the cylinder step side, the external screw thread of nozzle cylinder step lower end and the internal thread hole of connector are connected.The low speed pipe of injector is the little pipe of import large outlet, and the interior outside square of outlet connects, and external diameter connects firmly into a part by brace with the adjusting nut of import below, and the external screw thread on adjusting nut and nozzle cylinder step top is connected.Adapter sleeve is that female pipe is offered at two ends, offers port on the pipe wall, is connected with external screw thread on the connector circumference, and the adapter sleeve after the connection is inserted in nozzle and injector wherein.The low speed pipe of playpipe combustion chamber is a straight-run of pipe, than straight tube big be the combustion chamber, the outside connects for square in the outlet, offer external screw thread on the circular tube external wall of entrance point with adapter sleeve other end screw-internal thread fit, offer spaced breach on the position in the cavity outer wall deflection exit, combustion chamber of playpipe combustion chamber, the outlet of injector is in the below of playpipe combustion chamber import.
Because the needs of purposes and structure are made miniature playpipe to nozzle.The peak of injector outlet is concordant with the inlet of playpipe, down regulates the outlet of shift motion minimum point to miniature playpipe.Be injected into a branch of flowing because jet has, the outlet of miniature playpipe enters or recesses the mixing tube and the injector outlet of injector and recesses the certain distance of playpipe inlet, can not influence the effect of jet combustion.
What more than set forth is the structure of the conversion portion of air-flow, and combustion chamber, breach, the crater of back, playpipe combustion chamber belong to control section.The air-flow that playpipe conversion is come in the combustion chamber slows down flow velocity and control burning, breach supplemental oxygen or fire from the side, and crater has smooth combustion and improves the function of crater flame temperature.
Nozzle, injector, playpipe combustion chamber three's independent function and between relation:
1, nozzle is made miniature playpipe, and purpose is to bring into play high-velocity tube when flow velocity is very little, can mix with air, forms the low-temperature burning section.Simultaneously when middle high-temp combustion, for injector is sent to the combustible gas stream that the first time, fuel mixed with air.
2, injector is efficient a mixing and infinite variable speed equipment, accept the combustible gas stream that the first time, fuel mixed with air that miniature playpipe low speed pipe is sent here, carrying out the second time mixes, because shrinking earlier the kinetic energy of afterwards expanding with combustion-gas flow, it converts heat energy to, heat energy converts kinetic energy again to, improve the flow velocity and the flow of fuel and Air mixing and outlet widely, formed middle temperature burning zone; Injector is a buncher simultaneously, can provide required flow velocity and flow for the playpipe combustion chamber, satisfies the requirement that the playpipe combustion chamber converts laminar combustion to swirl combustion.
3, the playpipe combustion chamber is responsible for injector sent here and is met own required laminar combustion and convert swirl combustion to, and and control sections such as combustion chamber backward, breach, crater form high temperature burning zone.
4, the relation between the three: combining with top nozzle, injector, the independent function in playpipe combustion chamber is exactly the allomeric function of jet oxygen-enriched burner.But not being simple gathering together between them, but organically integrating, is the relation of a chain, interdependence, coordinate mutually, indivisible, realize the high-temp combustion of gaseous fuel jet jointly.
The theory of constitution of jet oxygen-enriched burner: nozzle is the aperture of control calorific capacity size, f
1Become high-velocity tube, the front of high-velocity tube outlet offers air intake opening, up is that big endoporus becomes the low speed pipe again, has formed miniature playpipe; The low speed pipe of miniature playpipe becomes the high-velocity tube of injector, and the inner chamber of injector is that mixing tube becomes the low speed pipe, and the outlet of injector is shunk afterwards earlier and expanded, and has formed injector; The outlet of injector becomes high-velocity tube, playpipe combustion chamber f
3Internal diameter become the low speed pipe, formed the big playpipe that laminar flow converts swirl combustion to; Big playpipe low speed pipe becomes high-velocity tube, and the internal diameter of combustion chamber becomes the low speed pipe, and breach advances air, and crater shrinks afterwards earlier and expands, and becomes high-velocity tube, has formed new injector.
The air current flow principle of jet oxygen-enriched burner: when source of the gas entered into the mouth of pipe of miniature playpipe low speed pipe from the nozzle aperture, the mouth of pipe produced negative pressure, and the suction air mixes and advances together, and fuel has obtained mixing for the first time with air.When flowing to the outlet of low speed pipe, the flow velocity of air-flow becomes the high speed gas thigh of injector mixing tube, when being ejected into the mouth of pipe of mixing tube, the mouth of pipe of mixing tube produces negative pressure, and air carries out mixing the second time in mixing tube with combustible gas stream, because mixing tube shrinks afterwards earlier and expands, increase useful work, improved flow velocity, improved composite rate, add that thermal power transfer becomes kinetic energy, flow velocity is accelerated.When the air-flow of burning entered the mouth of pipe of big playpipe, the mouth of pipe produced negative pressure once more, and the air-flow of burning mixes for the third time with air.Because the caliber of playpipe is bigger, flow velocity slows down, the negative pressure of its fluid is just blocked by atmospheric malleation, convert eddy current gas thigh to by laminar air flow, flow velocity slowed down when the gas thigh entered the combustion chamber, when air-flow will be gone out crater, because the crater cross-sectional area is less than the cross-sectional area of playpipe entry of combustion chamber, the cross-sectional area of playpipe entry of combustion chamber is again less than the cross-sectional area of combustion chamber, therefore the resistance of crater strengthens, and flow velocity is accelerated, and breach replenishes air once more, the flow velocity of crater is accelerated again, and the temperature of flame is higher.
Advantage of the present invention: the method that 1, adopts three oxygenation of three sections burnings in air, make gaseous fuel fully to burn, lift gas fuel combustion heat energy to greatest extent, flame profile is wide and lack, temperature reaches more than 900 degree, improves 100% the thermal efficiency or significantly reduces the burning cost than traditional gas fuel combustion method.2, the gaseous fuel jet oxygen-enriched burner made from the method is connected and is constituted by nozzle, injector and playpipe combustion chamber, and is simple in structure, easy to use, can make different combustion heads, satisfies the heating needs of different occasions.3, gaseous fuel jet oxygen-enriched burner can be formed different gaseous fuel jet oxygen-enriched burning devices with multiple device combination, fully realizes the actual effect of jet oxygen-enriched combusting.
(4) description of drawings
Fig. 1 is a jet combustion technical schematic diagram of the present invention.
Fig. 2 is the structural representation of one embodiment of the present invention.
(5) specific embodiment:
One, shown in Figure 2 is a kind of organization plan of gaseous fuel jet oxygen-enriched burner of the present invention, in this embodiment, this gaseous fuel jet oxygen-enriched burner is made of connector 1, sealing gasket 2, nozzle 3, injector 4, adapter sleeve 5, playpipe combustion chamber 6, holding screw 7, easy to process for making, above-mentioned each part is all made toroidal.
Two, connector 1 is cuboid or square, and the end face center offers tapped through hole and communicates with source of the gas and be connected with nozzle 3, and the top of connector 1 is shaped on external screw thread, connector 1 all the other five faces can be according to different needs, introduce source of the gas, the fixed position connects other device etc.
Nozzle 3 is major parts of control jet oxygen-enriched burner calorific capacity size.Nozzle 3 is processed by the hexagonal bar, external screw thread is processed in the upper end, and internal diameter is big axle core hole, and externally threaded below is original hexagonal bar and forms step, big axle core hole length surpasses the leave from office terrace, bores the little axle core hole f of system less than macro-axis core hole internal diameter in the middle of the step section below
1And both are communicated, and the back segment of step also is processed into external screw thread, and the tapped through hole of the external screw thread of back segment and connector 1 end face is connected, and pays for first between nozzle 3 step end faces and connector 1 end face to prevent the sealing gasket 2 that leaks gas.The hexagonal rod side inwardly is drilled with the air admission hole that communicates with macro-axis core hole internal diameter.Macro-axis core hole internal diameter is the low speed pipe of miniature playpipe, is again the high-velocity tube of injector 4, and the external screw thread of hexagonal rod upper end becomes the adjusting threaded guide rod of injector 4.The f in the little axle core hole of nozzle 3
1After being converted into diameter, can making nozzle separately and use, because the needs of purposes and structure are made miniature playpipe, f like this to it
1Become high-velocity tube, six faces advance air, and macro-axis core hole internal diameter becomes the low speed pipe.At P, W
1When very little, can form low-temperature burning, in order to give full play to W
1Effect, the caliber of low speed pipe is suitable to be considered toward direction less than normal; Miniature in addition playpipe is that injector 4 is sent to the combustible gas stream that the first time, gaseous fuel mixed with air.
Injector 4 is the efficient mixing and the infinite variable speed equipment of jet oxygen-enriched burner.Injector 4 is welded by two bump contacted chips by adjusting nut and mixing tube external diameter, the internal diameter of mixing tube is one section pipe, the interior outside that the mouth of pipe exports the end shape that meets at right angles is closed up, the maximum resistance coefficient of sudden contraction and expansion suddenly minimum drag coefficient combine, all spaces all are that into air is used.Adjusting nut matches with nozzle 3 upper external screw threads, inwardly offers the perforation screwed hole on the side of adjusting nut, and holding screw 7 screws in and connects in the screwed hole.When adjusting nut screwed in the threaded guide rod of nozzle 3 miniature playpipes, the low speed pipe of miniature playpipe just became the high-velocity tube of injector 4, and mixing tube volume N becomes the low speed pipe of injector 4, f
2Shrink afterwards earlier and expand, become the high-velocity tube of injector 4 outlets.
The purposes of injector 4: accept the combustible gas stream that the first time, gaseous fuel mixed with air that nozzle 3 is sent here, carry out the second time and mix.Because the inboard right angle of injector 4 outlets shrinks, and has increased the resistance of outlet, and combustible gas stream is mixed in mixing tube fully with air; The outside of injector 4 outlets also is the square expansion, dexterously the minimum drag coefficient of the maximum resistance coefficient of sudden contraction and expansion is suddenly combined, realize that air-flow is in the inboard maximum deceleration of outlet with in the maximum acceleration in the outlet outside, this is the special construction of injector 4, having reduced the volume and weight of structure simultaneously, also is the new technology of jet combustion.Injector 4 adds the displacement of adjusted threaded guide rod owing to structurally just take advantage, and can change the size of volume N, thereby changes the flow velocity and the flow of outlet, finds only W
2And V
2Send to for playpipe combustion chamber 6, therefore the W that can indiscriminately ad. as one wishes find an exit
2And V
2, complicated jet combustion calculating is become simple " addition and subtraction ".In addition, the injector 4 outlet outside is the square of open type, has enough air and space laminar combustion to be converted to swirl combustion for playpipe combustion chamber 6, and injector 4 has been formed middle temperature burning zone simultaneously.
The difference of injector 4 and ordinary injectors and Laval type: at first be that purpose is different, ordinary injectors and Laval type are to reduce energy consumption, raising work is renderd a service and is purpose, their low speed pipes all adopt the inlet that tapers to trunnion from inlet, again by the outlet flaring of trunnion to original caliber, when making air communication cross trunnion like this, obtain maximum operating efficiency.And injector 4 is to be purpose with the speed governing, utilize the heat energy of combustible gas stream burning generation and the cooperation of structure, by regulating the size of mixing tube volume N, the air that makes high velocity air can suck low speed in proportion mixes, for playpipe combustion chamber 6 provides suitable flow velocity and flow.Power resources difference besides, ordinary injectors and Laval type all need additionaling power, and energy always reduces.And 4 of injectors need the initial kinetic energy of fuel to change into heat energy, become kinetic energy by thermal power transfer then, and energy always increases, and exhaustless heat power is arranged.The 3rd is the structure difference, and the high-velocity tube of ordinary injectors is fixed on low speed tube inlet typhon mouth end, and the low speed pipe tapers to the inlet of trunnion from the typhon mouth, the more former pipe from the outlet flaring of trunnion to the typhon mouth.The Laval type all couples together the acute angle of the entrance and exit of trunnion and toy trumpet mouth junction with circular arc glossily, becomes " Laval type ".And must have one to be movable part in injector 4 high-velocity tubes and the low speed pipe, and the low speed pipe is one section pipe, and an end is an inlet, and the other end and the inlet of the trunnion shape that meets at right angles is connected, and the outlet of trunnion is expanded suddenly, is open type, does not have increaser.High-velocity tube also is that one section little pipe or nozzle are also made little pipe, can enter into the inlet of trunnion from the inlet of low speed pipe, leaves enough spaces of advancing air between the internal diameter of the external diameter of high-velocity tube and low speed pipe.In the exit of the inlet and the trunnion of trunnion, the minimum drag coefficient of the maximum resistance coefficient of sudden contraction and expansion is suddenly combined, obtain maximum deceleration and acceleration when making air communication cross trunnion.Be the purposes difference at last, the main purpose of ordinary injectors and Laval type is that material is transported to another place from a place.And the purpose of injector 4 is that two or more materials is required to allocate in proportion.Injector 4 can be described as the reverse side of Laval type from structural applications, and both also can be described as the special shape of ordinary injectors.
Adapter sleeve 5 is tubulose fixtures, its two ends offer internal thread, interlude is offered the spaced air notch that advances, the purposes of adapter sleeve 5 is that the internal thread of one end and the external screw thread on connector 1 top are connected, and with in nozzle 3, injector 4 its inner chambers of containing, leave on height dimension and regulate the leeway of injector about in the of 4, the other end is fixedlyed connected with the external screw thread of playpipe combustion chamber 6.
Playpipe combustion chamber 6 is a multi-functional equipment, is made of import endoporus pipe f two sections different endoporus pipes of diameter
3Be shaped on taper pipe thread, be shaped on external screw thread on the import endoporus pipe outer wall, up than import endoporus pipe f
3The endoporus pipe that diameter is big is the combustion chamber, and the outlet of combustion chamber is a crater, the at right angles closing in of shape in the interior lateral of crater, and the closing in diameter is less than import endoporus pipe f
3, offering rectangle breach separately on the outer wall of combustion chamber of crater lower end, the external screw thread on the import endoporus pipe outer wall offers screw-internal thread fit with adapter sleeve 5 other ends and is connected.Injector 4 cross-sectional area f
2Outlet be the high-velocity tube of playpipe combustion chamber 6, import endoporus pipe f
3It is the low speed pipe.The composition of new in addition injector: import endoporus pipe f
3Be high-velocity tube, the internal diameter of combustion chamber is the low speed pipe, and breach advances air, crater is prominent receive after again sudden expansion to become be high-velocity tube.F should be satisfied in playpipe combustion chamber 6
The chamber＞f
3＞f
Outlet, the height of combustion chamber and diameter are about equally.
The purposes of playpipe combustion chamber 6: when injector 4 high-velocity tubes suitable W
2, V
2Deliver to f
3The low speed pipe time, combustible gas stream mixes for the third time with air, W
2, V
2Convert W to
3, V
3, convert swirl combustion to by laminar combustion; When burned flame enters the combustion chamber, f
The chamber＞f
3, flow velocity slows down, and burns away, because f
Outlet＜f
The chamberAnd f
3, having increased the resistance of crater, the retention flame is in the combustion chamber internal combustion; When burned flame was gone out crater, new injector played a role, and crater flame flow velocity is accelerated, and the rectangle breach replenishes air, makes the flame temperature of crater higher, has formed high temperature burning zone.The low speed bore of playpipe is processed into taper pipe thread, and purpose is to increase resistance and disturbance, improves composite rate.The rectangle breach also has effects such as overflow, side fire.Crater is the significant points of control flame temperature, and its structure, dimensional requirement are all very strict, and enough resistances be arranged, and could bring into play W effectively
2, V
2Effect, as add the back taper cover, set up combustion chamber, reduced in size etc.When the high-temp combustion of playpipe combustion chamber 6 craters reaches optimum efficiency, tighten holding screw 7 injector 4 is fixed on the nozzle 3.
Three, overall structure function and correlation:
Detailed introduction has all been done to each parts in the front, and purpose is in order to understand the overall performance of jet oxygen-enriched burner better.The miniature playpipe of nozzle 3, injector 4, playpipe combustion chamber 6, new injector are joined together, and play a role jointly, are exactly the overall structure function of jet oxygen-enriched burner, and common target is to realize the high-temp combustion of flame.Nozzle 3, injector 4, playpipe 6 threes are organic wholes, the relation of a chain.Except that control positions such as combustion chamber, rectangle breach, crater can be according to changing with fiery needs, conversion nozzle 3, injector 4, playpipe 6 partly is indivisible, be interdependence, three's composition comes together as several squares, and the limit of the inside all is a common edge.
The position of injector 4 and adjustment stroke: the peak of injector 4 outlet regulating can only be concordant with the inlet of playpipe combustion chamber 6.Because jet has a branch of mobile characteristics that are injected into, injector 4 leaves playpipe combustion chamber 6 mouth of pipe certain distances, can not influence the mixed effect of jet, the outlet of the high-velocity tube of injector 4 is exactly the minimum point of injector 4 strokes like this, and the distance from the minimum point to the peak is exactly the adjustment stroke of injector 4.Adjustment stroke is concludeed a contract or treaty the extraction of cubic root that equals mixing tube volume N really.
Adjustment stroke and volume N and f
2Relation: work as f
1After determining, f
2, f
3Also determine f
1, f
3Be fixed on two, f
2Just equal adjustment stroke in the centre, play and hold down the function served as bridge that opens.Work as f
1Calorific capacity determine that theoretical combustion product amount V also determines, works as f
3Determine W
3Determine V
3Also determine; V
3Approximate V, so V
2Must satisfy V
3Requirement.So V
2Can not change, what can change has only f
2, W
2, work as f
2When being variable, following situation appears:
Work as f
2Strengthen W
2Reduce, N increases, the stroke lengthening;
Work as f
2Reduce W
2Strengthen, N reduces, and stroke shortens.
More than be exactly adjustment stroke and volume N and f
2Relation, in other words, same amount, mixing velocity is fast, the space that needs is little, mixing velocity is slow, the space that needs is big, this also is the relation of mixing velocity and volume.Determine f
2The time, suitable toward direction consideration less than normal, if f
1Increase, oxygen-supplying amount increases, f
2, N will reduce, and could improve W
2Flow velocity.
The condition of adjustment stroke: adjustment stroke is a key technology of the present invention, and its calculates complicated jet combustion and becomes simple " addition and subtraction ", and have efficiently, at a high speed, little, in light weight, the advantages of simple structure and simple of volume.But adjustment stroke has been arranged after all, and what can also shorten.
Relatively stable when pressure P, determine all that with a kind of gas kind, overall structure, size the crater flame profile is wide and lack during debugging, and also short and thick strong, can cancel adjustment stroke, because the resistance of crater is enough big, does not produce and take off fire, the flame stabilization burning.If pressure P changes toward little direction, because being basic, normal, high three sections burning zones, the jet oxygen-enriched burner forms, can not influence burning, but the quality of burning is had certain influence.When the calorific capacity of gas kind is more or less the same, when pressure P is basic identical, can cancel adjustment stroke.If gas kind calorific capacity increases, oxygen-supplying amount increases, and mixing velocity will improve, and needs adjustment stroke; If gas kind calorific capacity reduces, oxygen-supplying amount reduces, and mixing velocity will lower, and also needs adjustment stroke.
The adjustment method of jet oxygen-enriched burner and result of use:
Many argumentations have been done in conjunction with utilization in the adjustment method front, because it is just as the standard of flame detection temperature, last one program as using also need be repeated in this description as follows: lack if the flame profile of crater is wide, and short and thick strong, then belong to normal combustion; Grow if the flame profile of crater is narrow, then belong to anoxycausis, injector 4 reduces volume N toward downward modulation, improves W
2, V
2If the flame of crater detaches burner, injector 4 increases volume N toward raising, and reduces W
2, V
2More than debugging repeats then can to find only flame temperature for several times, simultaneously fixing injector 4.
Result of use: the jet oxygen-enriched burner successfully converts laminar combustion to swirl combustion, it is wide and lack that adjustment stroke can reach flame profile, and short and thick strong, more than temperature 900 degree, improve 100% the thermal efficiency or significantly reduced the burning cost than traditional combustion method.
Points for attention: control sections such as crater, combustion chamber, overflow breach, have with the same important function of conversion portion, make full use of this technology, could bring into play the effect of conversion portion effectively, this also is the relation of action and reaction.
Low, the middle temperature burning zone that nozzle 3, injector 4 are formed can only temporarily use.If long-time the use should be selected suitable model for use, because f
1Reduce, calorific capacity reduces, W
1Accelerate, oxygen-supplying amount increases, and both energy savings reduced again and pollutes.
Claims (10)
1, the method for gaseous fuel jet oxygen-enriched combusting, it is characterized in that: it utilizes gaseous fuel own pressure, jet to be injected into a branch of mobile characteristics, the energy that burning produces, the cross-sectional area of tangible nozzle (3), injector (4), playpipe (6) is placed on the same axis successively unlimitedly, the nozzle at two (3), playpipe (6) are fixed, injector (4) moves axially in middle predetermined stroke back and forth, sets up the schematic diagram of jet combustion technology.
2, the method for gaseous fuel jet oxygen-enriched combusting according to claim 1 is characterized in that: f
2=77f
1, f
3=1320f
1, wherein
1., f
1Cross-sectional area for nozzle (3);
2., f
2Cross-sectional area for injector (4) outlet;
3., f
3Cross-sectional area for playpipe (6);
F in the formula
1Decide according to producing required calorific capacity size, then f
1The substitution equation is obtained f
2, f
3F in practice
2Also be a variable, f
2With injector (4) volume N and move axially cooperating of adjustment stroke, could satisfy injector (4) exit velocity W
2Instructions for use.
3, the method for gaseous fuel jet oxygen-enriched combusting according to claim 2 is characterized in that: N＞400 * n, wherein
1., N is injector (a 4) volume;
2., n is along with f
1Change and change;
3., work as f
1=0 o'clock, n=0;
Work as f
1=0.1 o'clock, n=1;
Work as f
1=0.2 o'clock, n=2;
Above n value and the like, as long as selected f
1, obtain the n value, the substitution following formula just can be obtained the N value, and the N value is along with f
1Increase and reduce, along with f
2Minimizing and increase injector
(4) volume is cylindrical.
4, according to the method for any described gaseous fuel jet oxygen-enriched combusting among the claim 1---3, the crater flame temperature control method that it is characterized in that the combustion chamber of playpipe (6) is: the flame profile that ejects when the crater from the combustion chamber of playpipe (6) is wide lacks, and flame is short and thick when strong, and the flame temperature height is described; Grow if flame profile is narrow, belong to the oxygen-supplying amount deficiency, injector this moment (4) moves toward nozzle (3), up to flame present wide and lack, short and thick effectively till; If the crater resistance of the combustion chamber of playpipe (6) hour is lost control of burned flame and produced and take off fire, injector (4) moves toward playpipe (6), to satisfy the high-temp combustion condition of jet.
5, gaseous fuel jet oxygen-enriched burner, it is characterized in that: comprise nozzle (3), injector (4), playpipe (6), and be on the same axis respectively successively unlimitedly, the nozzle at two (3), playpipe (6) are fixed, injector (4) moves axially in middle predetermined stroke back and forth, forms the conversion portion of combustion-gas flow; Playpipe is provided with combustion chamber, breach, crater after (6), has constituted the control section of combustion flame.
6, gaseous fuel jet oxygen-enriched burner according to claim 5 is characterized in that: also comprise connector (1), sealing gasket (2), adapter sleeve (5), and holding screw (7), wherein
1., be provided with the internal thread hole that communicates with source of the gas in the heart in the end face of connector (1), be shaped on external screw thread on the circumference of this end face;
2., nozzle (3) is for having the barred body of regular polygon cylinder step, be shaped on external screw thread on the barred body of the top and the bottom of cylinder step, from top, the axle center of barred body is provided with axle center hole, surpass the cylinder step as the big axis core hole length of low speed pipe, and be f as high-velocity tube and cross-sectional area
1Little axle center hole be communicated with, inwardly offer the air admission hole that communicates with the big axis core hole on the cylinder step side; The external screw thread of nozzle (3) cylinder step lower end and the internal thread hole of connector (1) end face are connected and lock sealing gasket (2) between mating surface; Little axle center hole and big axis core hole constitute miniature playpipe, and the low speed pipe of miniature playpipe becomes the high-velocity tube of injector (4), and the external screw thread of low speed pipe becomes the threaded guide rod of injector (4);
3., the low speed pipe of injector (4) is the little pipe of import large outlet, external diameter connects firmly into a part by two braces with the adjusting nut of import below, the interior outside of injector (4) outlet is that square connects, the external screw thread on adjusting nut and nozzle (3) cylinder step top is connected, the big axis core hole internal diameter of external screw thread guide rod becomes the high-velocity tube of injector (4), the cooperation of high-velocity tube, low speed pipe constituted can the volume adjusted size injector (4);
4., adapter sleeve (5) is offered female pipe for two ends, offer vent notch on the pipe wall, external screw thread on one end and connector (1) the end face circumference is connected, adapter sleeve after the connection (5) is inserted in nozzle (3) and injector (4) wherein, and the other end and playpipe (6) external screw thread is connected;
5., playpipe (6) is the pipe of the different size endoporus formed of the low speed pipe of playpipe and combustion chamber control section, the f of playpipe (6) entrance point
3Be the low speed pipe, the endoporus bigger than low speed pipe is the combustion chamber, than low speed pipe f
3With the combustion chamber internal diameter all little be crater, the interior outside of crater is that square connects, the position of outer wall of combustion chamber deflection crater is provided with breach at interval, low speed pipe f
3External diameter on offer external screw thread with adapter sleeve (5) other end screw-internal thread fit; Injector (4) outlet is the high-velocity tube of playpipe (6), f
3Be the low speed pipe, formed the playpipe (6) that laminar combustion converts swirl combustion to; f
3Be high-velocity tube, the combustion chamber internal diameter is the low speed pipe, and breach advances air at interval, and crater is the high-velocity tube of minimum and maximum resistance coefficient combination, forms new injector;
6., when the flame temperature of crater is adjusted to the best, holding screw (7) lock onto injector (4) on the threaded guide rod of nozzle (3).
7, gaseous fuel jet oxygen-enriched burner according to claim 6, it is characterized in that: cross-sectional area is f
1Little axle center hole be the high-velocity tube of injector (4), perhaps the low speed pipe of miniature playpipe becomes the high-velocity tube of injector (4).
8, gaseous fuel jet oxygen-enriched burner according to claim 7 is characterized in that: the interior outside of the low speed pipe outlet of injector (4) is a square, the outside, f in the square
2, adjustment stroke, heat energy cooperation, form with the high-velocity tube of injector (4) and efficiently to mix and infinitely variable speeds equipment.
9, gaseous fuel jet oxygen-enriched burner according to claim 6 is characterized in that: the playpipe combustion chamber be have with laminar combustion convert swirl combustion, smooth combustion, raising crater flame temperature to, the side fires and the equipment of relief function.
10, gaseous fuel jet oxygen-enriched burner according to claim 6 is characterized in that: the crater cross-sectional area of playpipe combustion chamber, the cross-sectional area and the f of combustion chamber
3Three's size relationship is: f
The chamber＞f
3＞f outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100201538A CN1800710A (en) | 2006-01-09 | 2006-01-09 | Jet and oxygen-enriched combustion method for gas fuel and burner therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100201538A CN1800710A (en) | 2006-01-09 | 2006-01-09 | Jet and oxygen-enriched combustion method for gas fuel and burner therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1800710A true CN1800710A (en) | 2006-07-12 |
Family
ID=36810857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100201538A Pending CN1800710A (en) | 2006-01-09 | 2006-01-09 | Jet and oxygen-enriched combustion method for gas fuel and burner therefor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1800710A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339695A (en) * | 2017-07-31 | 2017-11-10 | 吉林大学 | A kind of laminar diffusion flame gas combustion testing system |
-
2006
- 2006-01-09 CN CNA2006100201538A patent/CN1800710A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339695A (en) * | 2017-07-31 | 2017-11-10 | 吉林大学 | A kind of laminar diffusion flame gas combustion testing system |
| CN107339695B (en) * | 2017-07-31 | 2023-04-14 | 吉林大学 | Laminar diffusion flame gas combustion testing system |
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Open date: 20060712 |