CN107702098A - A kind of double medium source of the gas plasma burners - Google Patents
A kind of double medium source of the gas plasma burners Download PDFInfo
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- CN107702098A CN107702098A CN201711130216.XA CN201711130216A CN107702098A CN 107702098 A CN107702098 A CN 107702098A CN 201711130216 A CN201711130216 A CN 201711130216A CN 107702098 A CN107702098 A CN 107702098A
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- gas
- pipe
- anode
- air
- negative electrode
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
Abstract
The invention belongs to the technical field available for plasma burners such as petrochemical industry, metallurgy and power industries, and in particular to a kind of double medium source of the gas plasma burners.The burner includes at least two cathode channel pipes, air hose, Gas Pipe, burner sleeve pipe, negative electrode, anode and insulating barrier, at least two cathode channels pipe, the one kind being disposed with around outer wall in the air hose and the Gas Pipe；The negative electrode is separately mounted to one end of each cathode channel pipe；The anode is separately mounted to one end of the air hose and the Gas Pipe, with each complete appearance of negative electrode.Thus, the burner is by using combustion gas and air dual gas supply as the medium source of the gas for producing hot plasma, unionized Some gases are burnt with air, required temperature can be obtained in terms of chemistry of fuel heat and plasma two, reduce the consumption of plasma electric energy simultaneously, cancel igniter, the coal gas inferior that flame temperature is higher, burning calorific value is extremely low.
Description
Technical field
The invention belongs to the technical field available for plasma burners such as petrochemical industry, metallurgy and power industries, specifically relate to
A kind of and double medium source of the gas plasma burners.
Background technology
Plasma refers to that gas contains a large amount of electronics, ion, excited state molecule, atom and freedom caused by being ionized
The high active substance of group, it is the state of material the 4th after solid-state, liquid, gaseous state, also referred to as " the 4th state " of material.
The temperature range of low temperature plasma is in thousands of to tens of thousands of degrees Celsius, also referred to as hot plasma.The hot plasma can answer
For industrial, pulverized coal boiler ignition rifle, gasification for rubbish or solid waste etc., the point of gas turbine can be used as
Hydrogen preparation in terms of fire and steady combustion, chemical industry etc., moreover, currently also thering are numerous studies to prepare graphite using hot plasma
The materials such as alkene.
At present, supplier of the plasma burner as thermal source, power station pulverized coal boiler igniting, solid waste rubbish are mainly used in
Melt process, flying dust processing etc..In the prior art, existing plasma burner uses single source of the gas as plasma more
Medium source of the gas caused by body, medium source of the gas are mainly the simple gases such as compressed air, argon gas, hydrogen, pass through height during use
The mode of pressure breakdown or contact arcing produces electric arc, for ionization medium gas；Moreover, existing plasma burner is main
Heat supply is so as to produce hot plasma by electric energy ionization medium gas, then carries out heat supply by hot plasma, because
This, it is huge to the power consumption as secondary energy sources.It is adjustable that a kind of two-stage is disclosed in the A of patent document CN 105674257
Water-vapor plasma turbulent burner, concrete structure are：Including first order plasma ignition apparatus, second level plasma
Adjuster and water vapour air supply system；Wherein, first order plasma ignition apparatus includes a wind pipe, inner combustion chamber, dense
Light separator, rotational flow generator, first order water vapour admission line, centre wind pipeline and first order plasma generator；The
Two level plasma adjusting means includes second level water vapour admission line, second level plasma generator, inner second air and entered
Feed channel and outer second air admission line.Thus, the technology is difficult to by the solution burning of two-stage water-vapor plasma generator
The problem of stable and NOx pollutant emissions are high, be difficult to catch fire especially suitable for meager coal, anthracite etc. light, NOx generation amount it is high
Coal, there is the effect that low nitrogen surely fires；Meanwhile the technology fires flame using altar lamp as a companion, it has steady combustion to act on, energy
Enough ensure that low-heat value gas is stable to burn.But the technology still suffers from some defects：For altar lamp flame, due to it
Outlet is smaller, and burned for long time easily forms carbon distribution in outlet；Moreover, the fuel of altar lamp flame should be the combustion of high heating value
Gas, this undoubtedly needs to increase a set of gas burning system again, increases the complexity of system.Therefore, a kind of structure letter how is designed
It is single, sparking mode is easy, suitable for low-heat value gas, improve the plasma burner of secondary energy sources service efficiency, turn into mesh
Preceding urgent need to solve the problem.
The content of the invention
For above-mentioned problem present in prior art, the invention provides a kind of double medium source of the gas Plasma burnings
Device, by using dual gas supply as the medium source of the gas for producing hot plasma, by arc voltage and medium gas source and flow amount
Adjustment allow its produce plasma while part of fuel burnt；Burnt by part of fuel and heat is provided,
Connect and instead of part electric energy, improve the service efficiency of secondary energy sources；Using plasma flame replaces traditional ion bar electricity
Acnode fire, its flame temperature is higher, and the flame temperature of ejection is up to more than 3000 DEG C, available for the various low-heat value gas that burn；
It is equally applicable for fuel gas with low heat value the invention provides a kind of double medium source of the gas plasma burners, while play igniting
And the effect surely fired.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
The invention provides a kind of double dielectric plasma burners, including two cathode channel pipes, air hose, Gas Pipe, burnings
Muzzle pipe, negative electrode and anode, wherein, a cathode channel pipe is respectively equipped with the inner chamber of the air hose and Gas Pipe,
The cathode channel pipe is horizontally extending, and parallel with the air hose and Gas Pipe respectively；Each cathode channel
One end of pipe is separately installed with a negative electrode；Pacify respectively the one end for being located at cathode side in the air hose and the Gas Pipe
Equipped with an anode, the anode is correspondingly arranged with the negative electrode, during power on, negative electrode and sun in air pipe line
Electric arc is formed respectively at the slype that negative electrode extremely at intersecting slype and in fuel gas pipeline intersects with anode；It is described
Burner sleeve pipe, it is circumferentially positioned on the air hose and the outer wall of the Gas Pipe, makes the air hose and the Gas Pipe
Part pipeline is horizontally extending in the inner chamber of the burner sleeve pipe.
Inventor has found, the invention provides a kind of double medium source of the gas plasma burners, makees by using dual gas supply
To produce the medium source of the gas of hot plasma, it is set to produce plasma by the adjustment to arc voltage and medium gas source and flow amount
Part of fuel can be burnt while body；Burnt by part of fuel and heat is provided, instead of part electric energy indirectly, improved
The service efficiencies of secondary energy sources；Using plasma flame replaces traditional ion bar arc ignition, and its flame temperature is higher,
The flame temperature of ejection is up to more than 3000 DEG C, available for the various low-heat value gas that burn；The invention provides a kind of double media
Source of the gas plasma burner, it is equally applicable for fuel gas with low heat value, while play a part of lighting a fire and surely firing.
According to a particular embodiment of the invention, in addition to insulating sleeve and insulating barrier, the negative electrode and each cathode channel
Pipe is connected by insulating sleeve；The anode is connected with the air hose and the Gas Pipe by insulating sleeve；The sun
Pole outside wall surface is provided with insulating barrier, and detonation occurs to prevent coal gas for completely cutting off gas passage.
According to a particular embodiment of the invention, in addition to cathode wire and positive wire, the positive wire pass through hollow
The burner sleeve pipe be fixedly mounted respectively with each anode；The cathode wire is led to by hollow described two negative electrodes
Deferent is fixedly mounted with each negative electrode.
According to a particular embodiment of the invention, in addition to cathode wire, in the slype, between negative electrode and anode between
Gap is 3-5mm.
According to a particular embodiment of the invention, at least two cathode channels pipe is hollow tube, and the anode includes cone
The anode spout of shape, burner sleeve pipe one end distance is 50-100mm described in the anode jet opening distance；The burner sleeve pipe it is another
One end is provided with cooling water inlet and coolant outlet；The air hose is provided with air intlet, and the Gas Pipe is provided with combustion gas
Import.
According to a particular embodiment of the invention, the cooling water inlet and coolant outlet are located at the same of the burner sleeve pipe
Arranged above and below one opening position, the mounting flange 80- of the cooling water inlet and coolant outlet on the burner sleeve pipe
100mm；A diameter of 20-40mm of the cooling water inlet and coolant outlet；The burner casing diameter is 100-200mm；
Mounting flange 40-60mm of the air intlet on the air hose；The latus rectum of the air intlet is 20-30mm；Institute
State mounting flange 40-60mm of the fuel gas inlet in the Gas Pipe；The latus rectum of the fuel gas inlet is 20-30mm.
According to a particular embodiment of the invention, can be by adjusting in anode and cathode DC voltage and air hose and Gas Pipe
Dielectric gas flow, to adjust plasma flame power, and then adjust flame temperature.
According to a particular embodiment of the invention, the air hose is used as dielectric gas, the combustion using air or compressed air
Tracheae is used as dielectric gas using natural gas or alkanes gas；The negative electrode, anode and connecting wire use red copper material.
Meanwhile present invention also offers a kind of application method of above-mentioned double dielectric plasma burners, its feature to exist
In comprising the following steps：
（1）It is passed through dielectric gas：First medium gas enters cathode channel pipe and the sky of air hose formation by air intlet
In gas passage, meanwhile, second medium gas enters cathode channel pipe and the blast tube of Gas Pipe formation by fuel gas inlet
It is interior；
（2）Dielectric gas burns：Switch on power, electricity is formed at the slype that the negative electrode in the air duct intersects with anode
Arc, meanwhile, electric arc is also formed at the slype that the negative electrode in the blast tube intersects with anode, now, two media gas
Body is ionized to as gaseous conductor, formation plasma flame so that first medium gas and second medium by electric arc respectively
Gas is sufficiently mixed rear moment and is ignited.
According to a particular embodiment of the invention, step（1）In, the first medium gas is air or compressed air；Institute
It is natural gas or alkanes gas to state second medium gas；Step（2）In, it is empty by adjusting after plasma flame is stable
The power of the proportioning and arcing voltage of gas and combustion gas, adjustment ionize a part of combustion gas and air, and another part fires
Gas and air are sufficiently mixed rear moment and are ignited, and form stable flame.
Beneficial effects of the present invention are as follows：
（1）The invention provides a kind of double medium source of the gas plasma burners, can replace conventional ion bar spark ignition
With traditional combustion gas altar lamp so that sparking mode is easier, so as to which effectively solving conventional gas altar lamp, burning is led for a long time
The problem of causing carbon distribution, meanwhile, the flame temperature of plasma is higher, and the flame temperature of ejection can be used for up to more than 3000 DEG C
Burn various low-heat value gas.
（2）, can be in the higher situation of flame temperature the invention provides a kind of double medium source of the gas plasma burners
Under（2500-3000℃）, with the consumption of part chemical energy alternative electric energy, power consumption 30%-40% is reduced, improves secondary energy sources
Service efficiency.
（3）The invention provides a kind of double medium source of the gas plasma burners, using dual gas supply as produce heat wait from
The medium source of the gas of daughter, by the adjustment to arc voltage and medium gas source and flow amount make its produce plasma while part
Fuel can be burnt；Meanwhile make the increase of its flame power adjustable range, further adjustable flame temperature, make its flame
Temperature regulating range increase, so as to which the operating mode of adaptation is more wide in range, is advantageous to industrial widely use.
（4）The invention provides a kind of double medium source of the gas plasma burners, anode and cathode uses red copper material, its electricity
Resistance is smaller, and electrical loss is smaller.
（5）It is equally applicable for fuel gas with low heat value the invention provides a kind of double medium source of the gas plasma burners, together
When play a part of light a fire and surely fire.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the sectional view of the present invention.
Wherein, 1, cathode channel pipe, 2, air intlet, 3, air hose, 4, cooling water inlet, 5, coolant outlet, 6, combustion
Tracheae, 7, fuel gas inlet, 8, burner sleeve pipe, 9, negative electrode, 10, anode, 11, insulating barrier.
Embodiment
Embodiments of the invention are described below in detail.The embodiments described below is exemplary, is only used for explaining this hair
It is bright, and be not considered as limiting the invention.Unreceipted particular technique or condition in embodiment, according to text in the art
Offer described technology or condition or carried out according to product description.Agents useful for same or the unreceipted production firm person of instrument,
For the conventional products of acquisition purchased in market can be passed through.
In the description of the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and can not
It is interpreted as indicating or implies relative importance or imply the quantity of the technical characteristic indicated by indicating.Thus, define " the
One ", one or more this feature can be expressed or be implicitly included to the feature of " second ".In the description of the invention,
" multiple " are meant that two or more, unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements.For the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
According to an aspect of the present invention, the invention provides a kind of double dielectric plasma burners, including at least two
Individual cathode channel pipe 1, air hose 3, Gas Pipe 6, burner sleeve pipe 8, negative electrode 9, anode 10 and insulating barrier 11, wherein, it is described at least
Two cathode channel pipes, the one kind being at least disposed with around outer wall in the air hose and the Gas Pipe；The negative electrode, respectively
Installed in one end of each cathode channel pipe；The anode, one end of the air hose and the Gas Pipe is separately mounted to, with
Each complete appearance of negative electrode, wherein, the anode outside wall surface is provided with insulating barrier, for completely cutting off gas passage to prevent coal gas
Generation detonation；The burner sleeve pipe, it is arranged on the outer wall surrounding of the air hose and the Gas Pipe.
Inventor has found, the invention provides a kind of double medium source of the gas plasma burners, makees by using dual gas supply
To produce the medium source of the gas of hot plasma, it is set to produce plasma by the adjustment to arc voltage and medium gas source and flow amount
Part of fuel can be burnt while body；Burnt by part of fuel and heat is provided, instead of part electric energy indirectly, improved
The service efficiencies of secondary energy sources；Using plasma flame replaces traditional ion bar arc ignition, and its flame temperature is higher,
The flame temperature of ejection is up to more than 3000 DEG C, available for the various low-heat value gas that burn；The invention provides a kind of double media
Source of the gas plasma burner, it is equally applicable for fuel gas with low heat value, while play a part of lighting a fire and surely firing.
The invention provides a kind of double dielectric plasma burners, including at least two cathode channel pipes 1, for setting
Negative electrode 9 is installed.According to a particular embodiment of the invention, one end of at least two cathode channels pipe is separately installed with a moon
Pole, when the power source is turned on, i.e., add stable high current in negative electrode 9 and anode 10 this two interpolar, by the dielectric gas between the two poles of the earth
Ionization, which is formed, has high-temperature electric conduction characteristic plasma, wherein, the ion of positively charged flows to the moon of the negative pole formation electric arc of power supply
Pole, electronegative ion and electronics flow to the anode of the positive pole formation electric arc of power supply.According to a particular embodiment of the invention, it is described
Air hose is used as dielectric gas using air or compressed air；The Gas Pipe is used as medium gas using natural gas or alkanes gas
Body.Further, at least two cathode channels pipe 1 is hollow tubular structure, described for cathode wire to be passed through
The hollow structure of cathode channel pipe；The negative electrode uses red copper material, and the cathode wire uses red copper material, good to ensure
Electric conductivity.According to a particular embodiment of the invention, the quantity of at least two cathode channels pipe can be for two or more
It is individual, in shaped formations such as cylinder, rectangle or cones；Preferably, the quantity of the cathode channel pipe is two, described
Cathode channel tube side-by-side is arranged, also, two negative electrodes are arranged entire row side by side.Thus, the burner is realizing using plasma
On the basis of flame replaces traditional ion bar arc ignition, structure more simplifies, easy to operate.
According to a particular embodiment of the invention, this pair of dielectric plasma burner also includes cathode wire and insulation sleeve
Pipe, wherein, the cathode wire is fixedly mounted by least two cathode channels pipe and each negative electrode；The negative electrode
It is connected respectively by insulating sleeve with least two cathode channels pipe.Further, because the cathode channel pipe is
Hollow tubular structure, so, the cathode wire through at least two cathode channels pipe hollow cathode passage with it is every
The individual negative electrode is fixedly mounted；Preferably, the hollow cathode of the cathode wire through at least two cathode channels pipe leads to
Installation is fixed by the way of welding with each negative electrode in road.
According to a particular embodiment of the invention, when the quantity of the cathode channel pipe is two, the quantity of negative electrode is also
Two, i.e. two negative electrodes are separately mounted to one end of respective cathode channel pipe, because cathode channel pipe is arranged to hollow structure
Pipe, cathode wire is passed through the hollow structure of the cathode channel pipe, be then fixedly attached to described the moon by the way of welding
Pole, the negative electrode are linked together with the cathode channel pipe by an insulating sleeve.Thus, the burner is realizing peace
On the basis of filling negative electrode, structure is simpler, and operation is more convenient.
The invention provides a kind of double dielectric plasma burners, including air hose 3, Gas Pipe 6 and insulating barrier 11, use
Anode 10 is installed in setting.According to a particular embodiment of the invention, the air hose, for delivering air to negative electrode and anode
Ionization is carried out between this two poles of the earth and forms plasma；The Gas Pipe, for by fuel gas transmission to negative electrode and this two poles of the earth of anode it
Between carry out ionization and form plasma；The insulating barrier, installed in the outer wall of the anode of the combustion gas tube end, for completely cut off with
The contact of gas passage, prevent coal gas from detonation occurs.According to a particular embodiment of the invention, the air hose is with air or compression
Air is as dielectric gas；The Gas Pipe is used as dielectric gas using natural gas or other alkanes gases.
According to a particular embodiment of the invention, the one of which in the air hose 3 and the Gas Pipe 6 is arranged in described
Around the outer wall of at least two cathode channel pipes, for forming the transfer passage of air or combustion gas as dielectric gas respectively.
One end of the air hose and the Gas Pipe is separately installed with anode, and the anode is respectively with each negative electrode into extracting
It is existing, also, retain certain gap between set of negative electrode and anode, i.e. between the anode and negative electrode of described Gas Pipe one end
The slype of combustion gas is formed, the slype of air is formed between the anode and negative electrode of described air hose one end.Further,
Gap between anode and cathode can not be too big, i.e. for the transfer passage of dielectric gas, what is formed between anode and cathode is narrow
Passage is more narrow and small, because gap too conference causes resistance too big, causes working gas to be not easy to be ionized, to be formed so as to be difficult to
Flame；Preferably, at burner outlet, the gap between anode and cathode should ensure that to be advisable in 3-5mm.Dielectric gas passes through conveying
Passage is transported at the slype between anode and cathode, when the power source is turned on, i.e., is added in negative electrode and anode this two interpolar stable
High current, the dielectric gas between the two poles of the earth is ionized to be formed with high-temperature electric conduction characteristic plasma, wherein, the ion of positively charged
The negative pole for flowing to power supply forms the negative electrode of electric arc, and electronegative ion and electronics flow to the anode of the positive pole formation electric arc of power supply.
According to a particular embodiment of the invention, the air hose is provided with air intlet 2, for being passed through air；The combustion
Tracheae is provided with fuel gas inlet 7, for being passed through combustion gas.Mounting flange 40- of the air intlet on the air hose
60mm；Preferably, distance is 50mm；Mounting flange 40-60mm of the fuel gas inlet in the Gas Pipe；Preferably,
Distance is 50mm.The air intlet can be the shapes such as cylinder or cuboid, as long as air can be smoothly passed through i.e.
Can；Further, the air intlet is cylinder, latus rectum 20-30mm；Preferably, latus rectum 25mm.The fuel gas inlet
Can be the shapes such as cylinder or cuboid, as long as combustion gas can be smoothly passed through；Further, the fuel gas inlet
For cylinder, latus rectum 20-30mm；Preferably, latus rectum 25mm.
According to a particular embodiment of the invention, the burner also includes positive wire, the positive wire with it is each described
Anode is fixedly mounted；Also include insulating sleeve and insulating barrier 11, the anode leads to respectively with the air hose and the Gas Pipe
Insulating sleeve connection is crossed, the insulating barrier is arranged on the outer wall of the anode of the combustion gas tube end, for isolation and gas passage
Contact, prevent coal gas occur detonation.The positive wire is by the burner sleeve pipe 8 respectively with each anode using weldering
The mode connect is fixedly mounted；Further, the anode includes anode spout, burner sleeve pipe one described in the anode jet opening distance
End distance is 50-100mm, and most preferably, distance is 80mm；Preferably, the anode uses red copper material, the positive wire
Using red copper material, to ensure good electric conductivity.The anode is separately mounted to one end of air hose and Gas Pipe, also,
Between anode and air hose, between anode and Gas Pipe connected by insulating sleeve, the outside wall surface installation of combustion gas anode
There is insulating barrier, contacted for completely cutting off with gas passage, prevent coal gas generation detonation；Preferably, the insulating sleeve, using pottery
Ceramic material, its good insulating and high temperature resistant, ensure the good security of burner.
When the quantity of at least two cathode channels pipe is two, the quantity of air hose is 1, the quantity of Gas Pipe
For 1, the quantity of the anode is two.When the Gas Pipe is arranged in around the outer wall of the cathode channel pipe, the combustion
Form blast tube between the outer wall of the inwall of tracheae and the cathode channel pipe, for using natural gas or other alkanes as
Dielectric gas, be transported to by the fuel gas inlet of Gas Pipe one end through the blast tube Gas Pipe the other end anode with
At slype between negative electrode, work as power-on, the dielectric gas is ionized to as conduction at slype by electric arc
Gas, and then electric energy is converted into the heat energy of working gas, working gas temperature extremely raises, maximum temperature reach 3000 DEG C with
On, and stable brilliant white flame can be formed；Meanwhile when the air hose is arranged in the outer wall week of the cathode channel pipe
Enclose, air duct is formed between the outer wall of the inwall of the air hose and the cathode channel pipe, for by air or compression
Air is transported to the other end of the air hose by the air intake of air hose one end as dielectric gas through the air duct
Anode and negative electrode between slype at, work as power-on, the dielectric gas is ionized at slype by electric arc
As gaseous conductor, and then electric energy is converted into the heat energy of working gas, working gas temperature extremely raises, and maximum temperature reaches
More than 3000 DEG C, and stable brilliant white flame can be formed；After the plasma flame stabilization for treating air hose and Gas Pipe,
By adjusting the proportioning of air and combustion gas and the power of arcing voltage, adjusting makes combustion gas and air partial ionization, and another portion
Due to plasma flame extreme temperatures, coal gas and air are sufficiently mixed rear moment and are ignited, and can be formed for point combustion gas and air
Stable flame, fuel combustion temperature mixes with plasma makes flame temperature control be completed at 2500-3000 DEG C or so
Igniting, so as to realize and substitute part electric energy with part of fuel chemical heat, power consumption can reduce 30%-40% or so.Treat plasma
After body flame stabilization, by adjusting the proportioning of air and combustion gas and the power of arcing voltage, adjustment makes combustion gas and air portion
Point ionization, and another part combustion gas and air are sufficiently mixed rear moment due to plasma flame extreme temperatures, coal gas with air
It is ignited, and stable flame can be formed, fuel combustion temperature mixes with plasma makes flame temperature control in 2500-
3000 DEG C or so.Therefore, if use low-heat value gas, because low-heat value gas is unable to autonomous stabilisation burning, plasma
Flame will keep sustained combustion state, as one with combustion flame, ensure the stable burning of low-heat value gas, so as to the burning
Device is equally applicable for fuel gas with low heat value, while plays a part of lighting a fire and surely firing；Moreover, the power of plasma flame is
Facilitate it is adjustable, by changing the voltage between anode and cathode, so as to adjust the power of plasma torch, this plasma flame,
Its power is smaller, adjustable in the range of 5-20kW.
The invention provides a kind of double dielectric plasma burners, including burner sleeve pipe 8, be arranged on the air hose and
The outer wall surrounding of the Gas Pipe, for carrying out cooling processing to air hose and Gas Pipe.According to a particular embodiment of the invention,
Described burner sleeve pipe one end is 50-100mm, preferred distance 80mm apart from the distance of the anode spout；The burner sleeve pipe
The other end be provided with two cooling nozzles, respectively cooling water inlet 4 and coolant outlet 5, it is preferred that described two cooling waters
Mouth is arranged in same position along same root RADIAL.Further, the cooling water outlet and inlet is on the burner sleeve pipe
Mounting flange 80-100mm, preferred distance 85mm；A diameter of 20-40mm of the cooling water outlet and inlet, it is preferably a diameter of
30mm；The burner casing diameter is 100-200mm, and preferably casing diameter is 150mm.Therefore, the burner sleeve ring around
All air hoses and the outer wall of anode one end of Gas Pipe, the inwall of the burner sleeve pipe and all air hose and Gas Pipe
Outer wall formed cooling duct, when cooling water flows as cooling medium in the cooling duct, can take away in time described in
The heat of air hose and Gas Pipe, cooling processing is carried out to its tube wall.
According to another aspect of the present invention, make present invention also offers a kind of above-mentioned double dielectric plasma burners
With method, comprise the following steps：
（1）It is passed through dielectric gas：A kind of dielectric gas enters cathode channel pipe and the sky of air hose formation by air intlet
In gas passage, meanwhile, another dielectric gas enters the combustion gas that cathode channel pipe formed with Gas Pipe by fuel gas inlet and led to
In road.
According to a particular embodiment of the invention, the one of which in the air hose and the Gas Pipe be arranged in it is described extremely
Around the outer wall of few two cathode channel pipes, for forming the transfer passage of air or combustion gas as dielectric gas respectively.Institute
The one end for stating air hose and the Gas Pipe is separately installed with anode, the anode respectively with each complete appearance of negative electrode,
Also, retain certain gap between set of negative electrode and anode, i.e. formed between the anode and negative electrode of described Gas Pipe one end
The slype of combustion gas, the slype of air is formed between the anode and negative electrode of described air hose one end.Further, negative and positive
Gap between pole can not be too big, i.e. for the transfer passage of dielectric gas, the slype that is formed between anode and cathode
It is more narrow and small, because gap too conference causes resistance too big, cause working gas to be not easy to be ionized, fire is formed so as to be difficult to
Flame；Preferably, at burner outlet, the gap between anode and cathode should ensure that to be advisable in 3-5mm.Dielectric gas is logical by conveying
Road is transported at the slype between anode and cathode, when the power source is turned on, i.e., is added in negative electrode and anode this two interpolar stable big
Electric current, the dielectric gas between the two poles of the earth is ionized to be formed with high-temperature electric conduction characteristic plasma, wherein, the ion stream of positively charged
The negative electrode of electric arc is formed to the negative pole of power supply, electronegative ion and electronics flow to the anode of the positive pole formation electric arc of power supply.
According to a particular embodiment of the invention, when the quantity of at least two cathode channels pipe is two, air hose
Quantity be 1, the quantity of Gas Pipe is 1, and the quantity of the anode is two.When the Gas Pipe is arranged in the negative electrode
Around the outer wall of tube channel, blast tube is formed between the outer wall of the inwall of the Gas Pipe and the cathode channel pipe, is used for
Using natural gas or other alkanes as dielectric gas, institute is transported to through the blast tube by the fuel gas inlet of Gas Pipe one end
State at the slype between the anode and negative electrode of the other end of Gas Pipe.Meanwhile when the air hose is arranged in the negative electrode
Around the outer wall of tube channel, air duct is formed between the outer wall of the inwall of the air hose and the cathode channel pipe, is used for
Using air or compressed air as dielectric gas, it is transported to by the air intake of air hose one end through the air duct described
At slype between the anode and negative electrode of the other end of air hose.Further, step（1）In, the air hose is with sky
Gas or compressed air are as dielectric gas；The Gas Pipe is used as dielectric gas using natural gas or alkanes gas；
（2）Dielectric gas burns：Switch on power, electricity is formed at the slype that the negative electrode in the air duct intersects with anode
Arc, meanwhile, electric arc is also formed at the slype that the negative electrode in the blast tube intersects with anode, now, two media gas
Body is ionized to as gaseous conductor by electric arc respectively, causes working gas temperature extremely to raise, and is formed plasma flame, is made
Coal gas and air are sufficiently mixed rear moment and are ignited.
When the quantity of at least two cathode channels pipe is two, the quantity of air hose is 1, the quantity of Gas Pipe
For 1, the quantity of the anode is two.The Gas Pipe using natural gas or other alkanes as dielectric gas through the combustion
Gas passage is transported at the slype between the anode and negative electrode of described Gas Pipe one end, works as power-on, the dielectric gas
It is ionized at slype by electric arc as gaseous conductor, and then electric energy is converted into the heat energy of working gas, work gas
Temperature extremely raises, and maximum temperature reaches more than 3000 DEG C, and can form stable brilliant white flame, that is, completes igniting.
Meanwhile air or compressed air are transported to the air hose one by the air hose as dielectric gas through the air duct
At slype between the anode and negative electrode at end, work as power-on, the dielectric gas is electric by electric arc at slype
From as gaseous conductor, and then electric energy is converted into the heat energy of working gas, working gas temperature extremely raises, and maximum temperature reaches
To more than 3000 DEG C, and stable brilliant white flame can be formed；Treat that the plasma flame of air hose and Gas Pipe stablizes it
Afterwards, by adjusting the proportioning of air and combustion gas and the power of arcing voltage, adjustment ionizes a part of combustion gas and air,
And another part combustion gas and air be due to plasma flame extreme temperatures, coal gas and air are sufficiently mixed rear moment and are ignited,
Stable flame is formed, also, fuel combustion temperature mixes with plasma makes flame temperature control at 2500-3000 DEG C,
Igniting is completed, so as to realize and substitute part electric energy with part of fuel chemical heat, power consumption can reduce 30%-40% or so.Cause
This, if use low-heat value gas, because low-heat value gas is unable to autonomous stabilisation burning, plasma flame will keep continuing
Fired state, as one with combustion flame, ensure the stable burning of low-heat value gas, so as to which the burner fires for low heat value
Gas is equally applicable, while plays a part of lighting a fire and surely firing；Moreover, the power of plasma flame be facilitate it is adjustable, lead to
The voltage crossed between change anode and cathode, so as to adjust the power of plasma torch, this plasma flame, its power is smaller,
It is adjustable in the range of 5-20kW；It is not electric by using combustion gas and the double dielectric gas of air as the medium source of the gas for producing plasma
From Some gases burnt with air, can from chemistry of fuel heat and plasma two in terms of obtain required temperature, simultaneously
Reduce the consumption of plasma electric energy, cancel igniter, the coal gas inferior that flame temperature is higher, burning calorific value is extremely low.
Inventor has found, the invention provides a kind of double medium source of the gas plasma burners, makees by using dual gas supply
To produce the medium source of the gas of hot plasma, it is set to produce plasma by the adjustment to arc voltage and medium gas source and flow amount
Part of fuel can be burnt while body；Burnt by part of fuel and heat is provided, instead of part electric energy indirectly, improved
The service efficiencies of secondary energy sources；Using plasma flame replaces traditional ion bar arc ignition, and its flame temperature is higher,
The flame temperature of ejection is up to more than 3000 DEG C, available for the various low-heat value gas that burn；The invention provides a kind of double media
Source of the gas plasma burner, it is equally applicable for fuel gas with low heat value, while play a part of lighting a fire and surely firing.
Embodiment 1：
Air and natural gas is respectively adopted as dielectric gas in gas, and burner design power is in 20kw, cooling water inflow 25L/
Min, cooling water potential difference adjust increasing air-fuel ratio as follows at 1 DEG C or so：
（1）Air-fuel ratio is 1：When 1, the thermal power that plasma provides is 13.9kw, and the thermal power for offer of burning is 6.0kw, with setting
Meter general power is more or less the same, and temperature repeats igniting experiments igniting at 2750 DEG C or so after burning, can stablize and burn, negative electrode
Service life is in 40 lab scales or so.
（2）Air-fuel ratio is 1：When 0.5, the thermal power that plasma provides is 13.8kw, and the thermal power for offer of burning is
2.2kw, 4kw is differed with design general power, temperature repeats igniting experiments igniting, can stablized at 1950 DEG C or so after burning
Burning, negative electrode service life is in 20 lab scales or so.
（3）Air-fuel ratio is 1：When 2, the thermal power that plasma provides is 14.0 kw, and the thermal power for offer of burning is 4.2kw,
1.8kw is differed with design general power, temperature repeats igniting experiments igniting at 2150 DEG C or so after burning, can stablize and burn,
Negative electrode service life is in 30 lab scales or so.
Mean temperature after burning can be adjusted by adjusting air-fuel ratio by experimental verification, when air-fuel ratio is smaller pair
Negative electrode service life has larger stealth, and the equal temperature of product can reduce after being burnt when air-fuel is bigger.
By largely testing, it is known that air-fuel ratio optimal values are 1:Between 1.01-1.05.
The present invention is described in detail above, used herein principle and embodiment of the embodiment to the application
It is set forth, the explanation of above example is only intended to help and understands the present processes and its core concept；Meanwhile for
Those of ordinary skill in the art, according to the thought of the application, change is had in specific embodiments and applications
Place, in summary, this specification content should not be construed as the limitation to the application.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (10)
1. a kind of double dielectric plasma burners, it is characterised in that including two cathode channel pipes, air hose, Gas Pipe, burnings
Muzzle pipe, negative electrode and anode, wherein,
A cathode channel pipe is respectively equipped with the inner chamber of the air hose and Gas Pipe, the cathode channel pipe edge is horizontal
Direction extends, and parallel with the air hose and Gas Pipe respectively；
One end of each cathode channel pipe is separately installed with a negative electrode；
The one end for being located at cathode side in the air hose and the Gas Pipe is separately installed with an anode, the anode with
The negative electrode is correspondingly arranged, during power on, at the slype that the negative electrode in air pipe line intersects with anode and combustion gas
Electric arc is formed respectively at the slype that negative electrode in pipeline intersects with anode；
The burner sleeve ring winding is put on the air hose and the outer wall of the Gas Pipe, makes the air hose and the combustion
The part pipeline of tracheae is horizontally extending in the inner chamber of the burner sleeve pipe.
2. a kind of double dielectric plasma burners as claimed in claim 1, it is characterised in that also including insulating sleeve and absolutely
Edge layer, the negative electrode are connected with each cathode channel pipe by insulating sleeve；The anode and the air hose and the combustion gas
Guan Jun is connected by insulating sleeve；The anode outside wall surface is provided with insulating barrier, occurs for completely cutting off gas passage to prevent coal gas
Detonation.
3. a kind of double dielectric plasma burners as claimed in claim 1, it is characterised in that also including cathode wire and sun
Polar conductor, the positive wire are fixedly mounted with each anode respectively by the hollow burner sleeve pipe；The negative electrode
Wire is fixedly mounted by hollow described two cathode channel pipes and each negative electrode.
4. a kind of double dielectric plasma burners as claimed in claim 1, it is characterised in that cloudy in the slype
Gap between pole and anode is 3-5mm.
5. a kind of double dielectric plasma burners as claimed in claim 1, it is characterised in that the anode includes taper
Anode spout, burner sleeve pipe one end distance is 50-100mm described in the anode jet opening distance；The other end of the burner sleeve pipe
Provided with cooling water inlet and coolant outlet；The air hose is provided with air intlet, and the Gas Pipe is provided with fuel gas inlet.
A kind of 6. double dielectric plasma burners as claimed in claim 5, it is characterised in that the cooling water inlet and cold
But water out is located at the same position of the burner sleeve pipe arranges up and down, and the cooling water inlet and coolant outlet are apart from institute
State the mounting flange 80-100mm on burner sleeve pipe；A diameter of 20-40mm of the cooling water inlet and coolant outlet；It is described
Burner casing diameter is 100-200mm；Mounting flange 40-60mm of the air intlet on the air hose；The sky
The latus rectum of gas import is 20-30mm；Mounting flange 40-60mm of the fuel gas inlet in the Gas Pipe；The combustion gas
The latus rectum of import is 20-30mm.
7. a kind of double dielectric plasma burners as claimed in claim 1, it is characterised in that can be by adjusting anode and cathode
DC voltage and air hose and the dielectric gas flow in Gas Pipe, to adjust plasma flame power, and then adjust fire
Flame temperature.
A kind of 8. double dielectric plasma burners as claimed in claim 1, it is characterised in that the air hose with air or
Compressed air is used as dielectric gas as dielectric gas, the Gas Pipe using natural gas or alkanes gas；The negative electrode, anode
Red copper material is used with connecting wire.
A kind of 9. application method of double dielectric plasma burners as described in claim any one of 1-8, it is characterised in that
Comprise the following steps：
（1）It is passed through dielectric gas：First medium gas enters cathode channel pipe and the sky of air hose formation by air intlet
In gas passage, meanwhile, second medium gas enters cathode channel pipe and the blast tube of Gas Pipe formation by fuel gas inlet
It is interior；
（2）Dielectric gas burns：Switch on power, electricity is formed at the slype that the negative electrode in the air duct intersects with anode
Arc, meanwhile, electric arc is also formed at the slype that the negative electrode in the blast tube intersects with anode, now, two media gas
Body is ionized to as gaseous conductor, formation plasma flame so that first medium gas and second medium by electric arc respectively
Gas is sufficiently mixed rear moment and is ignited.
10. method as claimed in claim 9, it is characterised in that step（1）In, the first medium gas is air or pressure
Contracting air；The second medium gas is natural gas or alkanes gas；Step（2）In, after plasma flame is stable, lead to
The proportioning of air and combustion gas and the power of arcing voltage are overregulated, adjustment ionizes a part of combustion gas and air, and another
A part of combustion gas and air are sufficiently mixed rear moment and are ignited, and form stable flame.
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| CN201711130216.XA CN107702098A (en) | 2017-11-15 | 2017-11-15 | A kind of double medium source of the gas plasma burners |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410235A (en) * | 2019-07-29 | 2019-11-05 | 大连民族大学 | A kind of nozzle application method suitable for double gaseous fuels |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410235A (en) * | 2019-07-29 | 2019-11-05 | 大连民族大学 | A kind of nozzle application method suitable for double gaseous fuels |
| CN110410235B (en) * | 2019-07-29 | 2021-06-22 | 大连民族大学 | Nozzle using method suitable for double-gas fuel |
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