CN110260359A - Fire lignite-fired unit plasma ignition assembly and ignition method - Google Patents
Fire lignite-fired unit plasma ignition assembly and ignition method Download PDFInfo
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- CN110260359A CN110260359A CN201910512755.2A CN201910512755A CN110260359A CN 110260359 A CN110260359 A CN 110260359A CN 201910512755 A CN201910512755 A CN 201910512755A CN 110260359 A CN110260359 A CN 110260359A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000002485 combustion reaction Methods 0.000 claims abstract description 163
- 239000002817 coal dust Substances 0.000 claims abstract description 79
- 238000010304 firing Methods 0.000 claims abstract description 76
- 239000003245 coal Substances 0.000 claims abstract description 49
- 239000003077 lignite Substances 0.000 claims abstract description 26
- 239000000843 powder Substances 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 22
- 238000007689 inspection Methods 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 5
- 239000004519 grease Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000001727 in vivo Methods 0.000 claims 1
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 46
- 230000000694 effects Effects 0.000 description 14
- 239000007789 gas Substances 0.000 description 8
- 230000009471 action Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000011819 refractory material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000004939 coking Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 3
- 238000013021 overheating Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001535 kindling effect Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
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- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
- F23Q7/06—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs structurally associated with fluid-fuel burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
- F23Q7/22—Details
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a kind of combustion lignite-fired unit plasma ignition assembly and ignition methods.Firing lignite-fired unit plasma ignition assembly includes coal pulverizer, resistance to hot-flow flue is offered in shell, resistance to hot-flow flue includes air intake vent and air outlet；Combustion-supporting air hose and micro- oil gun are provided in shell, the first end of combustion-supporting air hose is located at outside shell and is connected with combustion-supporting gas；Micro- oil gun includes oil inlet end and firing tip；Burner includes the single-stage combustion cylinder, secondary firing cylinder and plasma igniter being connected, and plasma igniter includes the nozzle for firing coal-dust；The outlet of secondary firing cylinder is connected with the entrance of coal-burning boiler.The ignition method of combustion lignite-fired unit plasma ignition assembly is used to light a fire to combustion lignite-fired unit plasma ignition assembly.Combustion lignite-fired unit plasma ignition assembly and ignition method provided by the invention improve the oil consumption to lignite burning is reduced, reduce the discharge of pollutant, are conducive to protect environment, and reduce the failure rate of coal burner appearance.
Description
Technical field
The present invention relates to ignition of the boiler technical field more particularly to a kind of combustion lignite-fired unit plasma ignition assembly and igniting
Method.
Background technique
Continuous with fuel price is risen, the continuous enlarging of electric power, the unit that heats, so that the industries such as electric power, petrochemical industry
The cold conditions or hot starting, hot start of various pulverized-coal fired boilers are lighted a fire and low-load combustion-stabilizing is increased with oil mass, and expense also ramps, while with
The increasing of the various industries oil mass such as communications and transportation, chemical industry, and fuel price is constantly increased.
In the prior art, lignite generally wears into coal dust in coal pulverizer, is blown into igniting, fire coal in burner after the heating and takes
Band flame carries out burning in boiler.The patent of Patent No. CN107575859A discloses a kind of oxygenation point of coal burning boiler of power station
Its several ignition smooth combustion method of ignition combustor, coal dust generally passes through after oil gun is lighted to burn in boiler, and inventor is realizing
It is found during innovation and creation, by grease gun igniting there are fuel consumptions big, deficiency at high cost of lighting a fire, and for water content
For higher lignite, igniting difficulty increases, and also further increases the consumption of fuel oil.Patent No.
A kind of alternating-current plasma ignition device for coal-fired boiler in power plant that the patent of CN201120156638.6 provides, passes through plasma combustion
Technology is heated instead of fuel oil combustion, is reduced fuel consumption, but is had the disadvantage that: first, that there are burning points is low for lignite,
The big feature of humidity, lighting lignite only with the Plasma Firing Technology in above-mentioned patent, there are what lignite can not effectively ignite to ask
Topic；Second, coal dust disposably burn in the combustion chamber of coal burner generation heat it is larger, combustion chamber will appear temperature change
Change the too fast problem of rate, the inner wall of combustion chamber is easy to expand under the action of quick overheat, is easy to appear crackle etc. and lacks
It falls into, the burning poor reliability of coal burner.Further, since the water content of lignite is larger, generally require by warm air equipment into
Row heating, in the prior art, warm air equipment generally uses steam as heat source and coal dust carries out heat exchange, the steam through heat exchange
Being cooled becomes liquid, often have in warm air equipment in warm air equipment steam and liquid alternated setting cause the shell of warm air equipment by
Damage, the heat exchanger fin corrosion of warm air equipment, reduces the heat transfer effect of warm air equipment, can not effectively heat to First air, heating is not
After complete First air is blown into burner hearth, coal dust can not effectively heat and be dried, coal dust temperature is caused to be not achieved a little not,
Coal dust accumulation is caused to cause the major accidents such as furnace puff or the air preheater being mounted on burner hearth kindling.
Therefore, it is necessary to solve above-mentioned technical problem.
Summary of the invention
The present invention provides a kind of combustion lignite-fired unit plasma ignition assembly and ignition method, to solve to exist in the prior art
The problem of, the oil consumption to lignite burning is reduced is improved, the discharge of pollutant is reduced, is conducive to protect environment, and reduce coal dust combustion
The failure rate that burner occurs, increases the reliability of coal burner.
A kind of combustion lignite-fired unit plasma ignition assembly, including the coal pulverizer for lignite to be worn into coal dust, further includes: shell
Body offers resistance to hot-flow flue in the shell, and the resistance to hot-flow flue includes air intake vent and air outlet；The air intake vent and wind regime phase
It is connected to, combustion-supporting air hose and micro- oil gun is provided in the shell, the first end of the combustion-supporting air hose is located at outside the shell and connects
Be connected to combustion-supporting gas, the second end of the combustion-supporting air hose extends into the resistance to hot-flow flue, and be located at the air intake vent with it is described
Between air outlet；Micro- oil gun includes oil inlet end and firing tip, and the oil inlet end is located at the outside of the shell, the igniting
End extends into the combustion-supporting air hose；The air outlet is connected with the entrance of the coal pulverizer；Burner, the burner packet
Include the single-stage combustion cylinder, secondary firing cylinder and plasma igniter being connected, the entrance and the mill of the single-stage combustion cylinder
The outlet of coal machine is connected, and the outlet of the single-stage combustion cylinder is connected with the entrance of the secondary firing cylinder, the second level combustion
The internal diameter for burning cylinder is greater than the internal diameter of the single-stage combustion cylinder, and the plasma igniter includes the nozzle for firing coal-dust；Institute
Nozzle is stated to extend into the single-stage combustion cylinder；Coal-burning boiler, the outlet of the secondary firing cylinder and entering for the coal-burning boiler
Mouth is connected.
Optionally, the quantity of the burner is multiple, preferably 2-4；Multiple burners are evenly distributed on combustion
The outside of coal burning boiler is provided with multiple entrances, the outlet of multiple secondary firing cylinders and the fire coal on the coal-burning boiler
Multiple entrances on boiler are connected correspondingly.
Optionally, combustion lignite-fired unit plasma ignition assembly further includes the AC power source and DC rectifier of circuit connection,
The DC rectifier and the plasma igniter circuit connection.
Optionally, the shell is rectangular housing, and the rectangular housing includes the wind inlet end and outlet air end being oppositely arranged, institute
It states air intake vent to be provided on the side wall of the wind inlet end, the air outlet is provided with the end face of the outlet air end.
Optionally, the first end of the combustion-supporting air hose is mounted on the inner face of the wind inlet end, and the of the combustion-supporting air hose
Two ends extend towards the air outlet.
Optionally, it is provided on micro- oil gun for the high-energy igniter to the micro grease gun igniting, the high energy point
Firearm is mounted on micro- oil gun.
Optionally, Image Fire inspection is provided on the shell, the inspection of described image fire includes test side and observation end, the sight
The outside that end is located at the shell is surveyed, the test side extends into the resistance to hot-flow flue.
Optionally, the burner further includes elbow, and the entrance of the elbow is for receiving coal dust, setting in the elbow
There are the separator that coal dust is divided into concentrated phase powder wind and light Xiang Fenfeng, the outlet and the entrance phase of the single-stage combustion cylinder of the elbow
Connection.
Optionally, the center of the entrance of the single-stage combustion cylinder is arranged towards the concentrated phase powder wind, the single-stage combustion cylinder
The edge of entrance be arranged towards the light phase powder wind；Level-one flow spoiler, the second level combustion are provided in the single-stage combustion cylinder
It burns in cylinder and is provided with second level flow spoiler.
Based on the same inventive concept, right the present invention also provides a kind of ignition method for firing lignite plasma ignition assembly
Combustion lignite plasma ignition assembly described in any of the above one is lighted a fire, comprising the following steps: coal dust is ground, in coal pulverizer
It is interior that lignite is milled into coal dust；The hot wind generated by the resistance to passage of heat heat to coal dust and the coal dust after heating is blown to combustion
In burner；Resistance to hot-flow flue is offered in the shell, the resistance to hot-flow flue includes air intake vent and air outlet；The air intake vent and wind
Source is connected, and combustion-supporting air hose and micro- oil gun are provided in the shell, and the first end of the combustion-supporting air hose is located at outside the shell
And be connected with combustion-supporting gas, the second end of the combustion-supporting air hose extends into the resistance to hot-flow flue, and be located at the air intake vent with
Between the air outlet；Micro- oil gun includes oil inlet end and firing tip, and the oil inlet end is located at the outside of the shell, described
Firing tip extends into the combustion-supporting air hose；The air outlet is connected with the entrance of the coal pulverizer, the heat of air outlet evolution
Wind is blown into coal pulverizer, heats to coal dust, and the coal dust after heating is blown out from the outlet of coal pulverizer；Firing coal-dust, it is described
Burner includes the single-stage combustion cylinder, secondary firing cylinder and plasma igniter being connected, the entrance of the single-stage combustion cylinder
It is connected with the outlet of the coal pulverizer, the outlet of the single-stage combustion cylinder is connected with the entrance of the secondary firing cylinder, institute
The internal diameter for stating secondary firing cylinder is greater than the internal diameter of the single-stage combustion cylinder, and the plasma igniter includes for firing coal-dust
Nozzle；The nozzle extends into the single-stage combustion cylinder, and coal dust, which enters in single-stage combustion cylinder, to burn, the combustion with flame
Coal enters in secondary firing cylinder；Coal-burning boiler operation, the coal dust with flame pass through the outlet of the secondary firing cylinder, coal-fired pot
Coal-burning boiler is carried out after the entrance of furnace, and is burnt in coal-burning boiler.
Combustion lignite-fired unit plasma ignition assembly and ignition method provided by the invention, combustion-supporting air hose are arranged in resistance to hot-flow flue
It is interior, by micro- oil gun in combustion air combustion inner pipe, First air current in resistance to hot-flow flue is effectively heated, is improved to one
Coal dust is heated to ignition point by the heating effect of secondary wind, the First air after guaranteeing heating, avoids the occurrence of furnace caused by coal dust is accumulated
The problem of thorax explosion or air preheater catch fire, improves the stability of system operation；After plasma igniter igniting, it is located at level-one and fires
It burns the concentrated phase powder wind at the center of cylinder and the light phase powder wind positioned at single-stage combustion cylinder edge burns, the flame being ignited enters two
Grade combustion barrel, secondary firing cylinder room displaced partially combusted heat, and the light phase powder wind burning of the edge of single-stage combustion cylinder
When the heat that generates it is less, avoid single-stage combustion cylinder and secondary firing cylinder inner wall occur under the action of quick overheat it is swollen
It is swollen, probability the defects of crack occurs for the inner wall of single-stage combustion cylinder and secondary firing cylinder is reduced, burner combustion is improved
Reliability；It avoids coal dust and concentrates on the phenomenon that partial combustion leads to local overheating, coking, increase ignition of the boiler and burning
Stability；In addition, combustion lignite-fired unit plasma ignition assembly of the invention also helps coal dust full combustion, difference can adapt to
The ignition requirement of coal, the firing power of the igniters such as reduction achieve the purpose that energy saving.
Detailed description of the invention
It below will be by preferred embodiment in attached drawing the present invention is described in detail, to help the purpose of the present invention and excellent is understood
Point, in which:
Fig. 1 is the structural schematic diagram for the combustion lignite-fired unit plasma ignition assembly that invention alternative embodiment provides.
Fig. 2 is the structural schematic diagram for the shell that alternative embodiment of the present invention provides.
Fig. 3 is the structural schematic diagram for the burner that alternative embodiment of the present invention provides.
Fig. 4 is the flow chart of the ignition method for the combustion lignite plasma ignition assembly that alternative embodiment of the present invention provides.
Specific embodiment
It mentions in the present specification or up, down, left, right, before and after, front, the back side, top, the bottom that may mention etc.
Positional terms are defined relative to each construction shown in the drawings, and word "inner" and "outside" refer respectively to direction or remote
From the direction of geometric center of specific component, they are opposite concepts, and it is therefore possible to can different location, difference according to locating for it
Use state and correspondingly changed.So also these or other positional terms should not be construed to restricted use
Language.
Fig. 1 is the structural schematic diagram for the combustion lignite-fired unit plasma ignition assembly that invention alternative embodiment provides, and Fig. 2 is this
The structural schematic diagram for the shell that invention alternative embodiment provides, Fig. 3 are the structure for the burner that alternative embodiment of the present invention provides
Schematic diagram.As shown in Figure 1 to Figure 3, the present invention provides a kind of combustion lignite-fired unit plasma ignition assemblies, including coal pulverizer 7, shell
Body 9 and burner 5.
Referring to Fig. 1 to Fig. 3, resistance to hot-flow flue 91 is offered in the shell 9, the resistance to hot-flow flue 91 includes inlet air
Mouth and air outlet；The air intake vent is connected with wind regime 10, and combustion-supporting air hose 92 and micro- oil gun 93, institute are provided in the shell 9
The first end for stating combustion-supporting air hose 92 is located at outside the shell 9 and is connected with combustion-supporting gas, and the second end of the combustion-supporting air hose 92 is prolonged
It puts in the resistance to hot-flow flue 91, and between the air intake vent and the air outlet；Micro- oil gun 93 includes oil inlet end
And firing tip, the oil inlet end are located at the outside of the shell 9, the firing tip extends into the combustion-supporting air hose 92.Igniting
Hold burn in resistance to hot-flow flue 91 and then add to the air-flow in resistance to 91 outside of hot-flow flue after the igniting of micro- oil gun 93
Heat, wherein combustion-supporting gas helps the firing tip sustained combustion of micro- oil gun 93 in combustion-supporting air hose 92, ensure that micro- oil gun 93 is run
Stability, and combustion-supporting air hose 92 increases the heating surface (area) (HS of air-flow, improves heating efficiency.
Lignite transportation system 8 transports lignite to coal pulverizer 7, and lignite is worn into coal dust, the air outlet by the coal pulverizer 7
It is connected with the entrance of the coal pulverizer 7；Air-flow after heating flows into coal pulverizer 7 from air outlet and heats to coal dust, coal
Powder flows in burner 5 after being heated to 60 DEG C or so under the drive of air-flow to burn, can be effectively by High water cut
The lignite coal dust of rate is dried and is heated, and is conducive to the later period to the plasma combustion of lignite.
The burner 5 includes single-stage combustion cylinder 51, secondary firing cylinder 52 and the plasma igniter 2 being connected, institute
The entrance for stating single-stage combustion cylinder 51 is connected with the outlet of the coal pulverizer 7, the outlet of the single-stage combustion cylinder 51 and described two
The entrance of grade combustion barrel 52 is connected, and the internal diameter of the secondary firing cylinder 52 is greater than the internal diameter of the single-stage combustion cylinder 51, described
Plasma igniter 2 includes the nozzle for firing coal-dust；The nozzle extends into the single-stage combustion cylinder 51, works as coal dust
After in into single-stage combustion cylinder 51, plasma igniter 2 is lighted a fire, and nozzle, which jets out flames, burns to coal dust, without consuming combustion
Oil reduces oil consumption, realizes high level of cleanliness environmental protection state oil-free, without black smoke state in entire 1 ignition process of coal-burning boiler,
And electrostatic precipitator can be made to come into operation, effectively improve environment protecting.The outlet and the combustion of the secondary firing cylinder 52
The entrance of coal burning boiler 1 is connected.By fractional combustion, secondary firing cylinder 52 displaced the heat of part coal dust firing, avoid
The inner wall of single-stage combustion cylinder 51 and secondary firing cylinder 52 expands under the action of quickly overheating, and reduces 51 He of single-stage combustion cylinder
The probability of the defects of crack occurs for the inner wall of secondary firing cylinder 52, improves the reliability of the burning of coal burner 5.
Coal dust with flame enters coal-burning boiler 1, and source of the coal dust as major heat carries out coal-burning boiler 1 progressive
Heating igniting, and coal-burning boiler 1 light a fire during, in conjunction with coal-burning boiler 1 temperature rise curve requirement, be gradually increased or
The output power for reducing coal dust input quantity and plasma igniter 2 makes the heat input amount of coal-burning boiler 1 meet coal-fired pot
The temperature rise curve requirement of furnace 1, sufficiently plays environmental protection and energy saving effect.Coal-burning boiler 1 is in entirely heating ignition process in micro- negative
Pressure condition plays certain protective role to burner 5.By operation, can successfully realize under conditions of single Pulverized Coal,
The reliable ignition and low-load combustion-stabilizing of coal-burning boiler 1, in entirely heating ignition process, from the flue gas that coal-burning boiler 1 is discharged
There is not black smoke, firing up process operation is good.
Wherein, online detection of primary air system 6 and control valve can also be set between coal pulverizer 7 and burner 5, with inspection
The content of coal dust and the aperture by adjusting control valve are surveyed, the content of coal dust is controlled in effective range.
Optionally, the quantity of the burner 5 is multiple, and multiple burners 5 are evenly distributed on the outer of coal-burning boiler 1
Side, is provided with multiple entrances on the coal-burning boiler 1, in the outlet of multiple secondary firing cylinders 52 and the coal-burning boiler 1
Multiple entrances be connected correspondingly.Above-mentioned set-up mode can carry out uniform feeding to coal-burning boiler 1, guarantee that boiler is high
Effect burning.Further, the quantity of burner 5 can be 4, and four burners are distributed in the quadrangle of coal-burning boiler 1, to fire coal
Boiler is effectively heated, and the quantity of burner can also be two, and perhaps three two or three burners can be uniform
Ground is distributed in the outside of coal-burning boiler 1.
Preferably, combustion lignite-fired unit plasma ignition assembly further includes the AC power source 4 and DC rectifier of circuit connection
3, the DC rectifier 3 and 2 circuit connection of plasma igniter.The three-phase alternating current of output is electrically accessed DC rectifier 3
It is rectified, three-phase alternating current rectification is become direct current, the powerful plasma igniter 2 of DC supply input, plasma point
Firearm 2 generates plasma torch.Wherein it is possible to be produced by the output power for adjusting DC rectifier 3 to plasma igniter 2
Raw plasma torch is adjusted, and improves the stability of plasma torch, reaches good ignition state.
As an optional implementation process, the shell 9 is rectangular housing, and the rectangular housing includes being oppositely arranged
Wind inlet end and outlet air end, the air intake vent are provided on the side wall of the wind inlet end, and the air outlet is provided with the outlet air end
End face.The above-mentioned design method with right-angled bend, after can making air-flow from air intake vent into resistance to hot-flow flue 91, immediately by straight
Angle turning, increases effective heat-exchange time of the air-flow in resistance to hot-flow flue 91, further increases the effect of heat exchange.
Further, the first end of the combustion-supporting air hose 92 is mounted on the inner face of the wind inlet end, the combustion-supporting air hose
92 second end extends towards the air outlet.The extending direction of combustion-supporting air hose 92 and the air-flow of heating coal dust are in resistance to hot-flow flue 91
Traffic direction it is consistent, increase the efficiency of heat exchange, further increase heat transfer effect.Combustion-supporting air hose 92 and combustion-supporting gas it
Between be equipped with pneumatic actuator, for control entrance combustion-supporting air hose 92 in combustion-supporting gas amount.
As an optional implementation process, the height for lighting a fire to micro- oil gun 93 is provided on micro- oil gun 93
Energy igniter, the high-energy igniter are mounted on micro- oil gun 93.High-energy igniter is being transported for lighting micro- oil gun 93
The manual shutoff door of high-energy igniter and micro- oil gun 93 is first turned on during row, clicks high-energy igniter into rifle button, high energy
Igniter enters position, opens the pneumatic oil valve of micro- oil gun 93, starting high-energy igniter sparking button, and high-energy igniter starts to strike sparks,
Light micro- oil gun 93.Further, oily fire inspection is additionally provided on micro- oil gun 93, oil fire inspection includes fire inspection processing board, micro- oil gun 93
Fire inspection processing board shows fire inspection intensity after igniting, and " having fire " signal lamp is bright.
Further, the outlet air end is provided with expansion joint.The swell increment after outlet air end is heated can be absorbed in expansion joint, protects
Protect the structural stability for the component being connected with outlet air end.
Further, Image Fire inspection 11 is provided on the shell 9, described image fire inspection 11 includes test side and sight
End is surveyed, the observation end is located at the outside of the shell 9, and the test side extends into the resistance to hot-flow flue 91.Image Fire inspection 11
Picture has combustion flame, illustrates that micro- oil gun 93 burns normally, high-energy igniter is out of service；Otherwise oil inlet end should be immediately closed off
And it lights a fire again.
As an optional implementation process, it is laid with refractory material in the resistance to hot-flow flue 91, increases resistance to hot-flow flue
91 heat-resisting effect.Wherein refractory material patch and the thickness in resistance to hot-flow flue 91 can be 100mm, to fully ensure that resistance to hot-flow flue
91 heat-resisting effect.
On the basis of the above embodiments, heat-resisting mushroom nail is provided in the resistance to hot-flow flue 91, the refractory material is logical
The heat-resisting mushroom nail is crossed to be fixed on the wall surface of the resistance to hot-flow flue 91.Refractory material is block-like structure, is easy at itself
It falls off from resistance to hot-flow flue 91 under gravity, refractory material can be stably mounted at resistance to hot-flow flue 91 by heat-resisting mushroom nail
On wall surface, the structural stability of resistance to hot-flow flue 91 is improved.Optionally, 100mm can be set into the length of heat-resisting mushroom nail, to increase
Add heat-resisting mushroom nail to the fastening effect of refractory material.
Further, the refractory material can be set to oxidation silica refractory or magnesium silica refractory, with
Improve the heat-resisting effect of resistance to hot-flow flue 91 and the stability of operation.
Optionally, temperature sensor is installed on the inner wall of the air outlet.It can be monitored in real time by temperature sensor
The temperature of First air at air outlet, and according to temperature value adjust the oil pressure of the oil inlet end of micro- oil gun 93, the pressure of combustion-supporting gas,
The aperture that air distribution adjusts door adjusts the amount of fuel and combustion flame of micro- oil gun 93 jointly, to control resistance to 91 air outlet of hot-flow flue
The temperature of the First air at place.
It should be noted that the steel plate that the main structure of shell 9 can be with a thickness of 5mm, and weld reinforcing rib and guarantee by force
Degree, and the silicic acid insulating layer for laying 50mm on the outside increases the stability of structure to reduce shell 9 and extraneous heat exchange.
The burner 5 further includes elbow 53, and the entrance of the elbow 53 is for receiving coal dust, setting in the elbow 53
There are the separator that coal dust is divided into concentrated phase powder wind and light Xiang Fenfeng, outlet and the single-stage combustion cylinder 51 of the elbow 53
Entrance is connected.The entrance of single-stage combustion cylinder 51 is connected with the outlet of elbow 53, and the center of the entrance of single-stage combustion cylinder 51
It is arranged towards concentrated phase powder wind, the edge of the entrance of single-stage combustion cylinder 51 is arranged towards light phase powder wind.Concentrated phase powder wind is from single-stage combustion
The center of cylinder 51 enters single-stage combustion cylinder 51, and light Xiang Fenfeng enters single-stage combustion cylinder 51 from the edge of single-stage combustion cylinder 51.Deng from
After sub- igniter 2 is lighted a fire, concentrated phase powder wind at the center of single-stage combustion cylinder 51 and positioned at the light of 51 edge of single-stage combustion cylinder
Xiang Fenfeng burns, and the flame being ignited enters secondary firing cylinder 52, the light phase powder wind burning of the edge of single-stage combustion cylinder 51
When the heat that generates it is less, by central burner, further avoid the inner wall of single-stage combustion cylinder 51 and secondary firing cylinder 52
It is expanded under the action of quick overheat, crack occurs for the inner wall for reducing boiler single-stage combustion cylinder 51 and secondary firing cylinder 52
The defects of probability, improve coal burner 5 burning reliability.
Wherein, it is provided with level-one flow spoiler 56 in single-stage combustion cylinder 51, second level flow-disturbing is provided in secondary firing cylinder 52
Device.Level-one flow spoiler 56 and second level flow spoiler can make coal dust generate turbulent motion, avoid and concentrate on partial combustion in coal dust
The phenomenon that leading to local overheating, coking, increases the stability of ignition of the boiler and burning.In addition, coal dust combustion provided by the invention
Burner 5 also helps coal dust full combustion, can adapt to the ignition requirement of different types of coal, reduces the igniting function of igniter
Rate achievees the purpose that energy saving.
Optionally, separator includes baffle, and baffle is just arranged facing towards the arc core of elbow 53.When coal dust is from separator
When entrance moves to the outlet of separator, the front that coal dust is gathered in baffle under the action of the centrifugal forms concentrated phase powder wind, is located at curved
Light Xiang Fenfeng is formed on the wall surface of first 53 inner side and outer side, simplifies the separation process of coal dust, and convenient to carry out.
Preferably, elbow 53 is circular arc elbow 53, the central angle of circular arc elbow 53 is right angle, and centrifuge separation effect can be improved
Fruit realizes the quick separating of concentrated phase powder wind and light Xiang Fenfeng.
As an optional implementation process, baffle is located at the center line of elbow 53 backwards to the side in the center of circle of elbow 53,
It can make just being arranged facing towards the center line of elbow 53 for baffle, concentrated phase powder wind concentrates on the center line of elbow 53 under the action of the centrifugal
Place.The center line of elbow 53 refers to the camber line in the 53 internal diameter center of circle of connecting bend.
On the basis of the above embodiments, baffle includes shunting end, shunts the outlet that end extends to elbow 53, single-stage combustion
The center of cylinder 51 enters the center of single-stage combustion cylinder 51 from end is shunted, ensure that concentrated phase powder towards end setting, concentrated phase powder wind is shunted
Central burner of the wind in single-stage combustion cylinder 51.
Further, the edge of the entrance of single-stage combustion cylinder 51 is aligned setting, light phase powder with the edge of the outlet of elbow 53
Wind enters the edge of single-stage combustion cylinder 51 from the edge of 53 inner wall of elbow, and the heat that light phase powder wind generates when burning is smaller, reduces
The scaling loss degree of the inner wall of single-stage combustion cylinder 51.
Preferably, level-one flow spoiler 56 includes multiple level-one flow-disturbings being arranged on 51 inner wall of single-stage combustion cylinder, Duo Geyi
Grade flow-disturbing block can increase the turbulent extent of concentrated phase powder wind and light Xiang Fenfeng, effectively prevent boiler hot-spot, coking.
On the basis of the above embodiments, multiple level-one flow-disturbing blocks uniformly divide along the circumferential of inner wall of single-stage combustion cylinder 51
Cloth, the coal dust that can flow through the inner wall of single-stage combustion cylinder 51 quickly leave the inner wall of single-stage combustion cylinder 51, further protect one
The inner wall of grade combustion barrel 51 is from damage.
Preferably, being additionally provided with three-level combustion barrel 54 in combustion tube, the entrance of three-level combustion barrel 54 is connected to secondary firing
The internal diameter of the outlet of cylinder 52, three-level combustion barrel 54 is greater than the internal diameter of secondary firing cylinder 52, and is provided with three in three-level combustion barrel 54
Grade flow spoiler, the flame of secondary firing cylinder 52 enter burning in three-level combustion barrel 54, can further increase the burning of coal dust
Rate, the damage that the inner wall of the inner wall, secondary firing cylinder 52 that lower single-stage combustion cylinder 51 is subject to；Three-level flow spoiler can be played into one
Step ground increases the effect of turbulent extent.
Further, level Four combustion barrel 55 is additionally provided in combustion tube, the entrance of level Four combustion barrel 55 is connected to three-level combustion
The outlet of cylinder 54 is burnt, the internal diameter of level Four combustion barrel 55 is greater than the internal diameter of three-level combustion barrel 54, and is provided in level Four combustion barrel 55
Level Four flow spoiler, the flame in three-level combustion barrel 54 carry out burning in level Four combustion barrel 55, can further increase coal dust
Combustion rate lowers the damage that is subject to of inner wall of the inner wall of single-stage combustion cylinder 51, the inner wall of secondary firing cylinder 52, three-level combustion barrel 54
Wound；Level Four flow spoiler can play the role of further increasing turbulent extent.
It should be noted that second level flow spoiler may include that the circumferential of multiple inner walls along secondary firing cylinder 52 is uniformly divided
The second level flow-disturbing block of cloth, the coal dust for flowing through the inner wall of secondary firing cylinder 52 quickly leaves the inner wall of secondary firing cylinder 52, into one
The inner wall of step ground protection secondary firing cylinder 52；Three-level flow spoiler may include the circumferential direction of multiple inner walls along three-level combustion barrel 54
Equally distributed three-level flow-disturbing block, the coal dust for flowing through the inner wall of three-level combustion barrel 54 quickly leave the interior of three-level combustion barrel 54
Wall further protects the inner wall of three-level combustion barrel 54；Level Four flow spoiler may include multiple along in level Four combustion barrel 55
The equally distributed level Four flow-disturbing block of the circumferential direction of wall, the coal dust for flowing through the inner wall of level Four combustion barrel 55 quickly leave level Four burning
The inner wall of cylinder 55, further protects the inner wall of level Four combustion barrel 55.
Fig. 4 is the flow chart of the ignition method for the combustion lignite plasma ignition assembly that alternative embodiment of the present invention provides.
As shown in Figures 1 to 4, based on the same inventive concept, the present invention also provides a kind of combustion lignite plasma ignition is total
At ignition method, light a fire to combustion lignite plasma ignition assembly described in any of the above one, comprising the following steps:
S1: grinding coal dust, and lignite is milled into coal dust in coal pulverizer 7；S2: coal dust is added by the hot wind that the resistance to passage of heat generates
Coal dust after heating is simultaneously blown in burner 5 by heat；Resistance to hot-flow flue 91 is offered in the shell 9, the resistance to hot-flow flue 91 wraps
Include air intake vent and air outlet；The air intake vent is connected with wind regime 10, and combustion-supporting air hose 92 and micro- oil gun are provided in the shell 9
93, the first end of the combustion-supporting air hose 92 is located at that the shell 9 is outer and be connected with combustion-supporting gas, and the of the combustion-supporting air hose 92
Two ends extend into the resistance to hot-flow flue 91, and between the air intake vent and the air outlet；Micro- oil gun 93 includes
Oil inlet end and firing tip, the oil inlet end are located at the outside of the shell 9, and the firing tip extends into the combustion-supporting air hose 92
It is interior；The air outlet is connected with the entrance of the coal pulverizer 7, and the hot wind of air outlet evolution is blown into coal pulverizer 7, carries out to coal dust
Heating, and the coal dust after heating is blown out from the outlet of coal pulverizer 7；S3: firing coal-dust, the burner 5 include being connected
Single-stage combustion cylinder 51, secondary firing cylinder 52 and plasma igniter 2, the entrance and the coal pulverizer of the single-stage combustion cylinder 51
7 outlet is connected, and the outlet of the single-stage combustion cylinder 51 is connected with the entrance of the secondary firing cylinder 52, the second level combustion
The internal diameter for burning cylinder 52 is greater than the internal diameter of the single-stage combustion cylinder 51, and the plasma igniter 2 includes the spray for firing coal-dust
Mouth；The nozzle extends into the single-stage combustion cylinder 51, and coal dust, which enters in single-stage combustion cylinder 51, to burn, with flame
Fire coal enters in secondary firing cylinder 52；S4: coal-burning boiler 1 is run, and the coal dust with flame is by the secondary firing cylinder 52
It exports, carry out coal-burning boiler 1 after the entrance of coal-burning boiler 1, and burn in coal-burning boiler 1.
Combustion lignite-fired unit plasma ignition assembly and ignition method provided in an embodiment of the present invention, the combustion-supporting setting of air hose 92 exist
It in resistance to hot-flow flue 91, is burnt in combustion-supporting air hose 92 by micro- oil gun 93, is had to First air current in resistance to hot-flow flue 91
The heating of effect improves the heating effect to First air, and coal dust is heated to ignition point by the First air after guaranteeing heating, avoids the occurrence of
The problem of furnace explosion caused by coal dust is accumulated or air preheater catch fire, improves the stability of system operation；Plasma igniter 2
After igniting, the concentrated phase powder wind at the center of single-stage combustion cylinder 51 and the light phase powder wind positioned at 51 edge of single-stage combustion cylinder fire
It burns, the flame being ignited enters secondary firing cylinder 52, and secondary firing cylinder Room 52 displaced partially combusted heat, and single-stage combustion
The heat that generates is less when the light phase powder wind burning of the edge of cylinder 51, avoids single-stage combustion cylinder 51 and secondary firing cylinder 52
Inner wall expands under the action of quick overheat, and the inner wall for reducing single-stage combustion cylinder 51 and secondary firing cylinder 52 is split
The probability of the defects of seam improves the reliability of the burning of burner 5；Avoiding coal dust and concentrating on partial combustion causes part super
The phenomenon that temperature, coking, increase the stability of ignition of the boiler and burning；In addition, combustion lignite-fired unit plasma ignition of the invention
Assembly also helps coal dust full combustion, can adapt to the ignition requirement of different types of coal, the igniting function of the igniters such as reduction
Rate achievees the purpose that energy saving.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, the range for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of combustion lignite-fired unit plasma ignition assembly, including the coal pulverizer for lignite to be worn into coal dust, which is characterized in that
Further include:
Shell offers resistance to hot-flow flue in the shell, and the resistance to hot-flow flue includes air intake vent and air outlet；The air intake vent with
Wind regime is connected, and combustion-supporting air hose and micro- oil gun are provided in the shell, and the first end of the combustion-supporting air hose is located at the shell
Outside and it is connected with combustion-supporting gas, the second end of the combustion-supporting air hose extends into the resistance to hot-flow flue, and is located at the air intake vent
Between the air outlet；Micro- oil gun includes oil inlet end and firing tip, and the oil inlet end is located at the outside of the shell, institute
Firing tip is stated to extend into the combustion-supporting air hose；The air outlet is connected with the entrance of the coal pulverizer；
Burner, the burner include the single-stage combustion cylinder, secondary firing cylinder and plasma igniter being connected, and described one
The entrance of grade combustion barrel is connected with the outlet of the coal pulverizer, outlet and the secondary firing cylinder of the single-stage combustion cylinder
Entrance is connected, and the internal diameter of the secondary firing cylinder is greater than the internal diameter of the single-stage combustion cylinder, and the plasma igniter includes
Nozzle for firing coal-dust；The nozzle extends into the single-stage combustion cylinder；
The outlet of coal-burning boiler, the secondary firing cylinder is connected with the entrance of the coal-burning boiler.
2. combustion lignite-fired unit plasma ignition assembly according to claim 1, which is characterized in that the quantity of the burner
To be multiple, preferably 2-4；Multiple burners are evenly distributed on the outside of coal-burning boiler, are arranged on the coal-burning boiler
There are multiple entrances, the outlet of multiple secondary firing cylinders is connected correspondingly with multiple entrances on the coal-burning boiler
It is logical.
3. combustion lignite-fired unit plasma ignition assembly according to claim 2, which is characterized in that combustion lignite-fired unit plasma
Igniting assembly further includes the AC power source and DC rectifier of circuit connection, the DC rectifier and the plasma igniter
Circuit connection.
4. combustion lignite-fired unit plasma ignition assembly according to claim 3, which is characterized in that the shell is Rectangular shell
Body, the rectangular housing include the wind inlet end and outlet air end being oppositely arranged, and the air intake vent is provided with the side wall of the wind inlet end
On, the air outlet is provided with the end face of the outlet air end.
5. combustion lignite-fired unit plasma ignition assembly according to claim 4, which is characterized in that the of the combustion-supporting air hose
One end is mounted on the inner face of the wind inlet end, and the second end of the combustion-supporting air hose extends towards the air outlet.
6. combustion lignite-fired unit plasma ignition assembly according to claim 5, which is characterized in that be arranged on micro- oil gun
Have for the high-energy igniter to the micro grease gun igniting, the high-energy igniter is mounted on micro- oil gun.
7. combustion lignite-fired unit plasma ignition assembly according to claim 6, which is characterized in that be provided on the shell
Image Fire inspection, the inspection of described image fire include test side and observation end, and the observation end is located at the outside of the shell, the detection
End extends into the resistance to hot-flow flue.
8. combustion lignite-fired unit plasma ignition assembly described in -7 any one according to claim 1, which is characterized in that the combustion
Burner further includes elbow, and the entrance of the elbow is provided in the elbow coal dust being divided into concentrated phase powder wind for receiving coal dust
Outlet with the separator of light Xiang Fenfeng, the elbow is connected with the entrance of the single-stage combustion cylinder.
9. combustion lignite-fired unit plasma ignition assembly according to claim 8, which is characterized in that the single-stage combustion cylinder
The center of entrance is arranged towards the concentrated phase powder wind, and the edge of the entrance of the single-stage combustion cylinder is set towards the light phase powder wind
It sets；It is provided with level-one flow spoiler in the single-stage combustion cylinder, is provided with second level flow spoiler in the secondary firing cylinder.
10. a kind of ignition method for firing lignite plasma ignition assembly, which is characterized in that claim 1-9 any one institute
The combustion lignite plasma ignition assembly stated is lighted a fire, comprising the following steps:
Coal dust is ground, lignite is milled into coal dust in coal pulverizer；
The hot wind generated by the resistance to passage of heat heat and the coal dust after heating is blown in burner to coal dust；The shell
Resistance to hot-flow flue is inside offered, the resistance to hot-flow flue includes air intake vent and air outlet；The air intake vent is connected with wind regime, the shell
It is provided with combustion-supporting air hose and micro- oil gun in vivo, the first end of the combustion-supporting air hose is located at outside the shell and is connected with combustion-supporting gas
Body, the second end of the combustion-supporting air hose extend into the resistance to hot-flow flue, and between the air intake vent and the air outlet；
Micro- oil gun includes oil inlet end and firing tip, and the oil inlet end is located at the outside of the shell, and the firing tip extends into institute
It states in combustion-supporting air hose；The air outlet is connected with the entrance of the coal pulverizer, and the hot wind of air outlet evolution is blown into coal pulverizer, right
Coal dust is heated, and the coal dust after heating is blown out from the outlet of coal pulverizer.
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| CN110529852A (en) * | 2019-09-23 | 2019-12-03 | 中国科学技术大学 | A kind of micro-oil ignition combustion device |
| CN110595060A (en) * | 2019-10-10 | 2019-12-20 | 襄阳中和机电技术有限公司 | Pipeline type oil-coal co-combustion system |
| CN114440257A (en) * | 2022-01-13 | 2022-05-06 | 徐兴国 | Plasma cooling air device for boiler |
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