CN2665548Y - Non-oil igniting device using plasma igniting boiler coal powder - Google Patents
Non-oil igniting device using plasma igniting boiler coal powder Download PDFInfo
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- CN2665548Y CN2665548Y CN 200320101460 CN200320101460U CN2665548Y CN 2665548 Y CN2665548 Y CN 2665548Y CN 200320101460 CN200320101460 CN 200320101460 CN 200320101460 U CN200320101460 U CN 200320101460U CN 2665548 Y CN2665548 Y CN 2665548Y
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Abstract
The utility model relates to an oil-free ignition device for lighting boiler pulverized coal with plasma, which comprises a plasma generation device, a water vapour or oxygen pipeline, an energy conversion chamber and a plasma jet orifice; the sidewall of the energy conversion chamber is a gap or a pore canal which is communicated with a water vapour or oxygen pipeline, and the gap or the pore canal is in one group of a plurality of groups; the inner end of the energy conversion chamber is a plasma output terminal, and the outer end is the plasma jet orifice; the ignition device is fixed at the end of an outer sleeve, the end of the outer sleeve is in a upward inclined bend structure, and the angle of inclination should be met with the plasma jet flame direction and the pulverized coal flow direction in an angle of 45 degrees to 90 degrees. Besides the elbow structure at the end of the outer sleeve, other parts are arranged inside an oil gun tube at the lower part of one-time wind pulverized coal mouth of the boiler. The utility model has the advantages that: the boiler pulverized coal can be lit by a low-power ion, thereby the frequency electrode replacement can be avoided; the stability and reliability of the ignition system is improved.
Description
Technical field
The utility model relates to the igniter of the pulverized-coal fired boiler in a kind of thermal power generation field.
Background technology
China is a thermoelectricity big country.Pulverized-coal fired boiler is the generating main body of China.In the middle of long-term operation, there is a problem to fail all the time well to solve, Here it is in the startup radiator of pulverized-coal fired boiler, combustion-supporting, surely combustion process, need burn a large amount of fuel oils.During this period, coal dust just seems powerless.Therefore, the fuel oil that the annual whole nation consumes in this respect is worth over ten billion Yuan, if use coal dust in the overall process of boiler combustion, can save more than 8,000,000,000 RMB.
In recent years, the method with fuel oil firing coal-dust boiler is tried hard to replace all in the research Plasma Firing Technology by each state, for various reasons, fails to obtain substantial technological break-through.The product that neither one has the commercial value popularization that is applied, serious day by day along with world oil crisis presses for a kind of ignition method and igniter of alternative fuel oil.
The present plasma pulverized coal ignition technology of using, having obvious problem is the ignition energy deficiency, and the arc ignition device that adopts with the past not have improvement in essence, and this thinking of photograph develops down, certainly will need more powerful plasma-arc.Very large negative electrode is the obstacle that this technical development is difficult to cross over, and the huge air draught negative electrode of ablating fast is the reality that must face, and the cost and the technology of negative electrode become focal issue.Another approach of existing method is that plasma and a wind coal dust are placed one, the development that expensive cost and reliability requirement have restricted it.
Summary of the invention
The utility model purpose provides utilizes existing plasma apparatus, realizes split, small-power plasma ignition boiler coal-ash, the boiler coal-ash igniter of avoiding frequently changing electrode and improving the work stability and reliability of ignition system.
A kind of non-oil ignition device with the plasma ignition boiler coal-ash described in the utility model comprises: plasma generator and current-carrying shower nozzle; Described current-carrying shower nozzle comprises power conversion chamber and plasma spray loophole; The sidewall of described power conversion chamber is slit or the duct that is communicated with water vapour or oxygen conveying pipe, and the inner of described power conversion chamber is that the plasma output of plasma generator, its outer end are the plasma spray loophole; Above-mentioned igniter is fixed on the end of an outer sleeve, the end of this outer sleeve is the elbow structure that is inclined upwardly, flame direction and pulverized coal flow direction that the plasma spray loophole should be satisfied in its angle of inclination are 45 °-90 ° angle, described outer sleeve is except that the end bends structure, other parts are placed in the oil gun pipeline of wind coal dust mouth below of boiler, plasma is placed outside the pulverized coal flow, from the below firing coal-dust of pulverized coal flow.
Aforesaid a kind of non-oil ignition device with the plasma ignition boiler coal-ash, wherein overcoat is cylindrical, be provided with a supporting leg in the anterior bottom of cylindrical shell, there is an igniting device support stand to be fixed on cylinder back-end, this igniter bracing frame bottom is connected with an oil gun Connection Block, and this oil gun Connection Block is connected with the oil gun seat of former boiler.
Aforesaid a kind of non-oil ignition device with the plasma ignition boiler coal-ash in overcoat, is provided with last siphunculus that is used for air pipe passway and the lower through-tube that is used for cable passage, and the outside of upper and lower siphunculus is cold true water chamber.
Aforesaid a kind of non-oil ignition device with the plasma ignition boiler coal-ash, the flame direction of described plasma jet mouth and pulverized coal flow direction are 60 ° of angles.
Aforesaid a kind of non-oil ignition device with the plasma ignition boiler coal-ash, slit otch or duct that the sidewall of described power conversion chamber is communicated with the steam conveyor tube road distribute ringwise, and with power conversion chamber sidewall at a tilt angle.
Aforesaid a kind of non-oil ignition device with the plasma ignition boiler coal-ash, described plasma producing apparatus is to adopt the plasma apparatus with inert gas shielding cathode construction.
Aforesaid a kind of non-oil ignition device with the plasma ignition boiler coal-ash, its plasma producing apparatus is the transferred arc type, add the positive voltage more than the 100V between the negative electrode of power conversion chamber and plasma producing apparatus, the end of transferred arc drops on the inwall of plasma spray loophole.
Aforesaid a kind of non-oil ignition device with the plasma ignition boiler coal-ash, when described oil gun base is portable, overcoat length should satisfy, after coal dust is lighted, by mobile igniter, the flame kernel of a wind is moved on to away from inlet front end by inlet front end, and described far and near the variation should guarantee that the plasma flaming contacts with coal dust.
Aforesaid a kind of non-oil ignition device with the plasma ignition boiler coal-ash, the power of described plasma generator is greater than 60 kilowatts.
The utility model is compared with traditional oil drop fire device, has following advantage:
1. the utility model is with oxo oil, and its meaning is that oil is non-renewable resource, and oxygen can be regenerated, and meets the clean regenerated resources of being advocated of utilizing of producing of country and realizes the principle of environmental protection.The utility model is the current-carrying shower nozzle of front end increase at the high power plasma generating means, is used to carry oxygen-containing gas and comprises pure oxygen and the current-carrying gas of steam.Front end at the current-carrying shower nozzle is provided with a compressed air shower nozzle, and compressed air forms one air conservation film around carrying object, and carrying object is steadily concentrated, and avoids the influence of entrainmenting of air.Carrying object concentrated combustion condition more is good more.
2. carrying object such as oxygen obtains high temperature energies greater than 5000 degree by plasma, and this thermometer is the outlet of device now, and a bright flame is arranged, and adds that the combustion-supporting effect of oxygen is enough to a wind coal dust is easily lighted.
3. this device has utilized the oil gun lever arm of former boiler, is used for adjusting the position of igniter and coal dust, utilizes flaming that coal dust is lighted in the initial stage igniter of igniting near coal dust.Coal dust after lighting forms a flue, in order to protect plasma generator and primary air nozzle, adjusts the position of igniter, makes flame kernel away from inlet front end, only just is enough to keep the burning of a wind coal dust with high-energy oxygen flow even normal temperature oxygen flow.
Since coal dust in combustion process with oxygen mix, therefore unburned coal dust does not reach oxygen, has effectively avoided the generation of coal dust explosion.Coal dust explosion in the past all is because temperature under the unburned state is closed with coal dust and oxygen-enriched air, has formed the explosion condition of coal dust, and this device has effectively been avoided the formation of coal dust explosion condition, therefore, is a kind of safe practical igniter.
5. the negative electrode of this device adopts inert gas shielding, has effectively avoided the erosion of airborne oxygen to electrode.This device adopts water-cooled to make its long-term work at high temperature.
Description of drawings
Fig. 1 is the structural representation of device for igniting coal powder of the present utility model;
Fig. 2 is the structural representation of igniter main body of the present utility model;
Fig. 3 is the structural representation of igniter of the present utility model and overcoat;
Fig. 4 is the A-A cutaway view of Fig. 3.
The specific embodiment
On the burner of pulverized-coal fired boiler, torch oil gun is always adjacent with the outlet of a wind coal dust, and this arrangement is in order to light the wind coal dust one time by oil gun.Under the situation that does not change former boiler design structure, apparatus of the present invention substitute oil gun, directly light the wind coal dust one time.The purpose of this design is the market demands that taken into full account product, because this device is at original boiler market, boiler is improved.So should not change the original structure of boiler by market demands, the present invention has realized the market breakthrough technically.Certainly this device also is applicable to newly-built boiler.
The igniter of the pulverized-coal fired boiler of realizing in order to the 4th step response of water is an example below, is described as follows:
Produce plasma arc by plasma generator 9, in power conversion chamber 13, carry the steam of coming in by plasma-arc ionization, generate the hydrogen-oxygen plasma by jet chimney 2.High-octane hydroxyl ion, from the hydrogen-oxygen plasma spray loophole 15 of igniter, spray inside at a high speed up to pulverized coal flow 7, in this process, hydroxyl ion is compound, produce thermal-flame 5 and water, thermal-flame is lighted coal dust and form stable combustion nucleus and then form stable combustion zone around combustion nucleus.Hydrogen-oxygen plasma torch 5 than other oxygen-containing gas plasma torch 6 long numbers doubly.Cooling jacket 16 is whole device cooling at the outermost layer of apparatus main body 1.The outermost layer of ignition device structure main body 1 is whole device cooling.The height of ignition device structure main body 1 is less than the height in boiler oil gun barrel road 4, and ignition device structure main body 1 can move forward and backward in boiler oil gun barrel road 4.In igniter time spent not, can be retracted into collection in the boiler oil gun barrel road 4.8 is pipe outlets of a wind coal dust among Fig. 1, the 3rd, and plasma-arc ionization power line.
The utility model is to utilize water to realize the high efficiency storage of energy and the process that discharges.Realize pulverized coal boiler ignition.Water is applied aspect a lot of as carrier of energy, realizes hydroelectric generation such as the potential energy drop that utilizes water.The intermolecular bond energy that exists of water absorbs a large amount of latent heat in the phase transition process of water from the liquid state to the gaseous state, this latent heat can be converted into other form of energy again, as steam engine, thermal power generation etc.Water as carrier of energy have storage, the transportation of energy, the effect of release is familiar with by people already.The utility model relates to a kind of device, and utilizing the 4th attitude of water is plasma state, realizes the further application of the power conversion of water from the rank of atom bond energy.
The composition of water is made up of hydrogen H and two kinds of elements of oxygen O, between the hydrogen-oxygen is to be linked to each other by atomic bond.The atomic bond of water has higher bond energy than molecular link.Hydrogen and oxygen can discharge a large amount of heat energy when burning, this energy is enough to make rocket to promote to hold the satellite Heaven.When same reason utilizes brine electrolysis to produce oxygen with oxygen, need same big electric energy open atomic bond.Water is when decomposing in other words, and huge energy has obtained storage with the ionization mode of hydrogen and oxygen.Hydrogen-oxygen by one one-tenth water of journey, can discharge this part energy again when burning.This character of water is used to realize that the igniting of coal dust is very suitable.Feature of the present utility model is to adopt the steam ionization of hot plasma with water.The conversion that water uses a large amount of electric energy to take place in ionization process.Energy is stored in the hydrogen ion of ionic state, and the energy density of comparing igniter with gaseous plasma has improved tens of times.On the other hand owing to exist the compound combustion of hydroxyl ion, the length that makes plasma flame than gas plasma body extension several times.Flame can extend to the depths of primary air nozzle pulverized coal flow, and having formed one is the middle internal combustion district of combustion nucleus in the inside of pulverized coal flow with the oxyhydrogen flame.The high-energy flame that oxyhydrogen combustion produces is lighted coal dust.
The utility model is used for pulverized coal ignition and has original security.The ion of hydrogen and oxygen participates in burning with the molal quantity of equivalent, does not have too much oxygen or hydrogen and exists.The compound feature of hydroxyl ion is to produce flame, the frequency of flame and coal dust firing.Owing to do not have combustion-supporting gas, can not increase the violence of coal dust firing.Reduced the blaster meeting of coal dust.Increased the security of boiler.
Plasma producing apparatus described in the utility model adopts the standard plasma generating means in industrial plasma welding, plasma cutting and the plasma spray coating equipment.The inert protective gas that adopts in the plasma producing apparatus is the protective gas of monoatomic molecules structure, as: argon Ar.The arc power of plasma is 90kw.
The steam that this device uses is made by industrial pure water, and the preheat temperature of steam is 500.
Plasma generator in this device is the transferred arc type, is added with the above positive voltage of 100V between the negative electrode of power conversion chamber and plasma producing apparatus.An end points of the plasma-arc that power conversion is indoor is on the inwall of jet.
The injection stream of hydroxyl ion results from the pressure of steam in this device, and regulates, controls the speed of injection stream by the pressure to steam.
This device can be selected the indoor chamber of power, power conversion of corresponding plasma producing apparatus and the size and the water vapour pressure of jet according to the light a fire boiler of power requirement of difference.
The hydrogen-oxygen plasma spray loophole of this device becomes the angle less than 90 ° with plane, a wind coal dust passway, its effect is to make the combustion zone of coal dust away from a wind coal dust passway, the protection boiler-burner.
This device can also be with pure oxygen or the oxygen enrichment gas of lighting as plasma, and its principle is just in narration.
Among Fig. 3, Fig. 4, overcoat 27 is a cylindrical shape, and the end is acclivitous elbow structure, igniter is placed in one, and is provided with siphunculus 19 and lower through-tube 20 in the straight drum part of overcoat 27, and wherein going up siphunculus 19 is gas or steam channel, lower through-tube 20 is a cable passage, and they are all isolated with the water wall.In overcoat 27 rear ends, be igniter bracing frame 21, upper and lower siphunculus fairlead 23,26 extends igniter bracing frame 21.The inner chamber of overcoat 27 is a jacket structure for water, and cooling water upper and lower conduit 24,25 is positioned at the rear end of overcoat 27.In the lower end of igniter bracing frame 21 is oil gun Connection Block 22, by oil gun Connection Block 22 overcoat 27 is fixed on the mobile device in the boiler oil duct.In overcoat 27, society has pipe to support 17, below the straight drum part front end of overcoat 27, is provided with supporting leg 18.
Claims (9)
1. the non-oil ignition device with the plasma ignition boiler coal-ash comprises: plasma generator and current-carrying shower nozzle; It is characterized in that: described current-carrying shower nozzle comprises power conversion chamber and plasma spray loophole; The sidewall of described power conversion chamber is slit or the duct that is communicated with water vapour or oxygen conveying pipe, and the inner of described power conversion chamber is that the plasma output of plasma generator, its outer end are the plasma spray loophole; Above-mentioned igniter is fixed on the end of an outer sleeve, the end of this outer sleeve is the elbow structure that is inclined upwardly, flame direction and pulverized coal flow direction that the plasma spray loophole should be satisfied in its angle of inclination are 45 °-90 ° angle, described outer sleeve is except that the end bends structure, other parts are placed in the oil gun pipeline of wind coal dust mouth below of boiler, plasma is placed outside the pulverized coal flow, from the below firing coal-dust of pulverized coal flow.
2. a kind of non-oil ignition device as claimed in claim 1 with the plasma ignition boiler coal-ash, it is characterized in that: described overcoat is cylindrical, be provided with a supporting leg in the anterior bottom of cylindrical shell, there is an igniting device support stand to be fixed on cylinder back-end, this igniter bracing frame bottom is connected with an oil gun Connection Block, and this oil gun Connection Block is connected with the oil gun seat of former boiler.
3. a kind of non-oil ignition device as claimed in claim 1 with the plasma ignition boiler coal-ash, it is characterized in that: described in overcoat, be provided with last siphunculus that is used for air pipe passway and the lower through-tube that is used for cable passage, the outside of upper and lower siphunculus is cold true water chamber.
4. a kind of non-oil ignition device with the plasma ignition boiler coal-ash as claimed in claim 1, it is characterized in that: the flame direction of described plasma jet mouth and pulverized coal flow direction are 60 ° of angles.
5. a kind of non-oil ignition device as claimed in claim 1 with the plasma ignition boiler coal-ash, it is characterized in that: slit otch or duct that the sidewall of described power conversion chamber is communicated with the steam conveyor tube road distribute ringwise, and with power conversion chamber sidewall at a tilt angle.
6. a kind of non-oil ignition device with the plasma ignition boiler coal-ash as claimed in claim 1 is characterized in that: described plasma producing apparatus is to adopt the plasma apparatus with inert gas shielding cathode construction.
7. a kind of non-oil ignition device as claimed in claim 1 with the plasma ignition boiler coal-ash, it is characterized in that: described plasma producing apparatus is the transferred arc type, add the positive voltage more than the 100V between the negative electrode of power conversion chamber and plasma producing apparatus, the end of transferred arc drops on the inwall of plasma spray loophole.
8. a kind of non-oil ignition device as claimed in claim 1 with the plasma ignition boiler coal-ash, it is characterized in that: when described oil gun base is portable, overcoat length should satisfy, after coal dust is lighted, by mobile igniter, the flame kernel of a wind is moved on to away from inlet front end by inlet front end, and described far and near the variation should guarantee that the plasma flaming contacts with coal dust.
9. a kind of non-oil ignition device with the plasma ignition boiler coal-ash as claimed in claim 1, it is characterized in that: the power of described plasma generator is greater than 60 kilowatts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320101460 CN2665548Y (en) | 2003-10-20 | 2003-10-20 | Non-oil igniting device using plasma igniting boiler coal powder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320101460 CN2665548Y (en) | 2003-10-20 | 2003-10-20 | Non-oil igniting device using plasma igniting boiler coal powder |
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| CN2665548Y true CN2665548Y (en) | 2004-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320101460 Expired - Fee Related CN2665548Y (en) | 2003-10-20 | 2003-10-20 | Non-oil igniting device using plasma igniting boiler coal powder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100416165C (en) * | 2006-03-24 | 2008-09-03 | 王福林 | Oxygen-enriched igniting and firing stabilizer without oil |
| CN101324341B (en) * | 2008-07-09 | 2010-06-02 | 西安热工研究院有限公司 | Apparatus and method for pulverized coal boiler pure oxygen ignition / steady combustion |
| CN102269424A (en) * | 2011-04-26 | 2011-12-07 | 向卫 | Oxygen enrichment plasma oil-free ignition and stable combustion method and device |
| EP2770257A4 (en) * | 2011-10-18 | 2015-07-08 | Shanghai Boiler Works Co Ltd | Plasma oil-free fire lighting system in oxygen-enriched environment |
-
2003
- 2003-10-20 CN CN 200320101460 patent/CN2665548Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100416165C (en) * | 2006-03-24 | 2008-09-03 | 王福林 | Oxygen-enriched igniting and firing stabilizer without oil |
| CN101324341B (en) * | 2008-07-09 | 2010-06-02 | 西安热工研究院有限公司 | Apparatus and method for pulverized coal boiler pure oxygen ignition / steady combustion |
| CN102269424A (en) * | 2011-04-26 | 2011-12-07 | 向卫 | Oxygen enrichment plasma oil-free ignition and stable combustion method and device |
| CN102269424B (en) * | 2011-04-26 | 2014-01-22 | 向卫 | Oxygen enrichment plasma oil-free ignition and stable combustion method |
| EP2770257A4 (en) * | 2011-10-18 | 2015-07-08 | Shanghai Boiler Works Co Ltd | Plasma oil-free fire lighting system in oxygen-enriched environment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |