CN109827168A - A kind of coal dust manifold type burner and combustion method - Google Patents
A kind of coal dust manifold type burner and combustion method Download PDFInfo
- Publication number
- CN109827168A CN109827168A CN201910193619.1A CN201910193619A CN109827168A CN 109827168 A CN109827168 A CN 109827168A CN 201910193619 A CN201910193619 A CN 201910193619A CN 109827168 A CN109827168 A CN 109827168A
- Authority
- CN
- China
- Prior art keywords
- gas
- coal dust
- combustion
- flameless
- burner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002817 coal dust Substances 0.000 title claims abstract description 149
- 238000009841 combustion method Methods 0.000 title claims abstract description 7
- 239000007789 gas Substances 0.000 claims abstract description 152
- 238000002485 combustion reaction Methods 0.000 claims abstract description 135
- 239000003245 coal Substances 0.000 claims abstract description 75
- 239000000567 combustion gas Substances 0.000 claims abstract description 54
- 239000002737 fuel gas Substances 0.000 claims abstract description 51
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 34
- 230000003647 oxidation Effects 0.000 claims abstract description 33
- 238000010304 firing Methods 0.000 claims abstract description 22
- 230000002269 spontaneous effect Effects 0.000 claims abstract description 9
- 230000001590 oxidative effect Effects 0.000 claims description 76
- 239000007800 oxidant agent Substances 0.000 claims description 75
- 239000003795 chemical substances by application Substances 0.000 claims description 53
- 239000003546 flue gas Substances 0.000 claims description 48
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 43
- 239000000446 fuel Substances 0.000 claims description 22
- 239000000779 smoke Substances 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 6
- 238000009827 uniform distribution Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 230000008859 change Effects 0.000 claims description 2
- 239000003034 coal gas Substances 0.000 claims description 2
- 229910052593 corundum Inorganic materials 0.000 claims description 2
- 239000010431 corundum Substances 0.000 claims description 2
- 239000003517 fume Substances 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000003915 liquefied petroleum gas Substances 0.000 claims description 2
- 239000003345 natural gas Substances 0.000 claims description 2
- 238000011282 treatment Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 57
- 206010021143 Hypoxia Diseases 0.000 abstract description 11
- 230000002631 hypothermal effect Effects 0.000 abstract description 10
- 230000007954 hypoxia Effects 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008034 disappearance Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 208000018875 hypoxemia Diseases 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention discloses a kind of coal dust manifold type burner and combustion methods.The device includes gas combustion chamber and the pulverized coal combustor that is arranged in the fuel gas buring room；Flameless gas burner is installed at the top of the gas combustion chamber；Intracavitary carry out flameless combustion of the combustion gas by the Flameless gas burner in the fuel gas buring room, outside coal dust firing room；Coal dust flameless burner is installed, the coal dust flameless burner is at the top of the gas combustion chamber at the top of the pulverized coal combustor；Coal dust carries out flameless combustion in the coal dust firing room by the coal dust flameless burner.The homogeneous temperature field that coal dust manifold type burner of the invention is generated by gas flameless combustion is as a uniform radiant heat source, enable coal dust flameless combustion is spontaneous to maintain, oxidation can be stablized under the atmosphere of hypothermia and hypoxia, to largely reduce the production quantity of nitrogen oxides, the minimum discharge of coal dust firing nitrogen oxides is realized.
Description
Technical field
The present invention relates to coal powder burning technology fields, more particularly to a kind of coal dust manifold type burner and burning side
Method.
Background technique
Growth with human society to the energy especially fossil energy demand, the energy to the restriction of socio-economic development and
Influence to resource environment is also further obvious.Global atmosphere pollution in recent years is on the rise, and environmental protection, which has become, works as this life
Boundary develops very important topic.Nitrogen oxides (NOx) it is the life to the mankind one of the main reason for forming acid rain and PM2.5
Living and health produces great harm.And one of the main energy sources that coal is used as human world, the nitrogen that coal dust firing generates
Oxide is many, and country also becomes to be increasingly stringenter for relevant emission request.2014 Nian9Yue National Development and Reform Committees, ring
Guarantor portion, National Energy Board, which combine, prints and distributes " coal electricity energy-saving and emission-reduction upgrading and transformation action plan ", and thermal power plant's nitrogen oxidation is realized in plan
Object minimum discharge requires NO in minimum dischargexDischarge value is lower than 50mg/m under 6% benchmark oxygen content3。
Traditional combustion system mainly includes the tangential firing using DC burner and the eddy flow using turbulent burner
Burning.In traditional combustion system, since coal dust generates flame in specific region concentrated combustion, flame front regional area
Ignition temperature is very high, leads to the NO of coal dust firingxRaw emissions value is very high.Such as use anthracitic pulverized-coal fired boiler and
Use the boiler of bituminous coal, NOxRaw emissions value is more than 400mg/m3, the two substantially exceeds relevant emission standards.It uses simultaneously
Although the denitration technologies such as SCR, SNCR can reduce the discharge amount of nitrogen oxides, but can not change the original of nitrogen oxides
Beginning discharge value.
Application No. is 201410542668.9 Chinese patents to disclose a kind of double circle of contact air-coal separating adjustable DC coal dusts
Burner realizes horizontal bias and vertical bias combustion simultaneously in one group of burner, makes NOxProduction quantity ratio use single combustion
Burning mode reduces by 10%~20%.But the raw emissions value of nitrogen oxides is still very high, can not reach the super of nitrogen oxides
Low emission.Application No. is 201510442294.8 Chinese patents to disclose a kind of low NOxCombustion method and low NOxBurning system
System, reinforces the reduction of nitrogen oxides, but the discharge amount of nitrogen oxides is only capable of being less than by way of fractional combustion
320mg/m3, can not realize the minimum discharge of nitrogen oxides.United States Patent (USP) US5464344A is by by air and fuel nozzle
It maintains a certain distance, and air and fuel nozzle is kept at an angle, NO can be reduced to a certain degreexIt generates, but the combustion
Burning is still based on traditional flaming combustion, though reduce NO by constructing recirculating zonexIt generates, but still local high temperature zone can not be eliminated
Generation, therefore NO can not be greatly loweredxDischarge.
Flameless combustion is a kind of new and effective combustion with reduced pollutants technology, has the advantage that reaction rate is low, locally releases
Heat is less, heat flux distribution is uniform, ignition temperature is low and is evenly distributed, is minimum without flame front, noise, and nitrogen oxides (NOx) row
It puts extremely low.Flameless combustion technology can reduce by 70% discharged nitrous oxides, be considered as 21 century most preparation exhibition by world burning circle
One of technology of potentiality.With the further investigation to combustion technology, application is also gradually widened from gas burning to the combustion of coal dust
It burns.
The raw emissions value that coal dust firing nitrogen oxides can be largely reduced using flameless combustion technology, compared to
Traditional combustion mode, flameless combustion technology can reduce by 70% discharged nitrous oxides.In order to reach the ultralow nitrogen oxygen of coal dust firing
Compound discharge needs to reduce the concentration of oxygen and the temperature of burning as far as possible.If by ignition temperature be reduced to 1250K with
Under, then it is expected to be directly realized by the ultralow NO of coal dustxDischarge.But this required hypothermia and hypoxia atmosphere is difficult to maintain coal dust
Continued stable combustion, thus uniform external heat source is needed to keep flameless combustion of the coal dust under hypothermia and hypoxia more stable.
To sum up, traditional coal dust combustion system will generate a large amount of nitrogen oxides raw emissions, and it is not able to satisfy correlation
Discharge standard.In order to realize the ultralow NO of coal dust firingxDischarge, need as far as possible reduce combustion process furnace in oxygen concentration with
And ignition temperature.But under this atmosphere coal dust can not carry out from maintain stablize burning, will cause imperfect combustion and
The problems such as after-flame degree is low or even reaction temperature, which can be gradually reduced, finally results in flame-out generation.
Summary of the invention
It, can be in order to solve the above technical problems, the present invention provides a kind of coal dust manifold type burner and combustion method
Realize ultralow NO in process of coal combustionxDischarge.Coal dust manifold type burner of the invention is generated by gas flameless combustion
Homogeneous temperature field as a uniform radiant heat source, enable coal dust flameless combustion is spontaneous to maintain, in the atmosphere of hypothermia and hypoxia
Oxidation can be stablized under enclosing, to largely reduce the production quantity of nitrogen oxides, realize the minimum discharge of coal dust firing nitrogen oxides.
In order to achieve the goal above, the invention adopts the following technical scheme:
One aspect of the present invention provides a kind of coal dust manifold type burner, which includes gas combustion chamber and be arranged in institute
State the pulverized coal combustor in fuel gas buring room；
Flameless gas burner is installed at the top of the gas combustion chamber；Combustion gas is existed by the Flameless gas burner
Intracavitary carry out flameless combustion in the fuel gas buring room, outside coal dust firing room；
Coal dust flameless burner is installed, the coal dust flameless burner runs through the combustion at the top of the pulverized coal combustor
At the top of combustion chamber；Coal dust carries out flameless combustion in the coal dust firing room by the coal dust flameless burner.
Coal dust manifold type burner of the invention constructs two combustion chambers of combustion gas flameless combustion and coal dust flameless combustion,
It realizes without flame front (i.e. without local high temperature zone) flameless combustion, thus NO can be effectively performed in two kinds of combustion chambersxIt generates
Control, and it is able to achieve the common efficient utilization of gaseous fuel and coal dust.The uniform temperature that the device is generated by gas flameless combustion
Field is spent as a uniform radiant heat source, enables coal dust flameless combustion is spontaneous to maintain, it can under the atmosphere of hypothermia and hypoxia
Stablize oxidation, to largely reduce the production quantity of nitrogen oxides, realizes the minimum discharge of coal dust firing nitrogen oxides.
Preferably, the Flameless gas burner includes exhaust gas nozzle, internal oxidition agent pipe and external oxidation agent pipe；
The exhaust gas nozzle is F type pipe, and two bending places are main fuel gas inlet and preheated fuel gas entrance respectively, and exit is set
It is equipped with flame holder；
The internal oxidition agent pipe is L-type pipe, is nested in outside the exhaust gas nozzle, and circumferential weld between the two is logical as oxidant
Road is provided with guide vane in channel；
The external oxidation agent pipe main body be L-type pipe, be nested in outside the internal oxidition agent pipe, L-type pipe exit circumferentially
It is uniformly arranged and is communicated with several smooth-bore tips and exported as external oxidation agent pipe, the exit end face and internal oxidition agent pipe of smooth-bore tip
Exit end face is concordant.
Preheated fuel gas is passed through by the preheated fuel gas entrance and is preheated to the gas combustion chamber, at this time oxidant gas
Body is passed through by internal oxidition agent pipe；After preheating, preheated fuel gas is cut off, main combustion gas is passed through by the main fuel gas inlet, and
Oxidant gas is switched to and is passed through by the external oxidation agent pipe, main combustion gas spontaneous combustion, flame front disappearance shape after the combustion is stabilized
At flameless combustion, uniform distribution of temperature field, while to pulverized coal combustor radiations heat energy, pulverized coal combustor is preheated.
Preferably, if the coal dust flameless burner includes fuel nozzle and is evenly arranged around the fuel nozzle
Dry oxidation agent nozzle.The coal dust flameless burner runs through the upper side wall (i.e. top) of gas combustion chamber, and passes through the side of welding
Formula is reinforced.
Coal dust, which is carried by oxidant gas from the fuel nozzle, enters the pulverized coal combustor；Simultaneous oxidation agent gas
The pulverized coal combustor is entered by the oxidant nozzle in the form of high-speed jet after pressurization, makes coal dust in combustion chamber
Interior carry out flameless combustion.
Wherein, oxidant gas enters the coal by the oxidant nozzle in the form of high-speed jet after pressurization
Powder combustion chamber, volume inhales a large amount of flue gases formation hypothermia and hypoxia atmosphere while combustion-supporting, and coal dust is made to carry out stable nothing in the combustion chamber
Flame burning, realizes the slow oxidative reaction under hypothermia and hypoxia atmosphere, inhibits heating power type and fuel type NOxIt generates, to reach
Ultralow NOxDischarge.
Preferably, the bore d1 of the smooth-bore tip of the Flameless gas burner is internal oxidition agent nozzle exit internal diameter d2
0.1-0.3 times；
The bore of the oxidant nozzle of the coal dust flameless burner and the smooth-bore tip of the Flameless gas burner
Bore it is identical.
Preferably, the smooth-bore tip and oxidant nozzle are all larger than equal to 4.
Preferably, the preheated fuel gas is methane gas or hydrogen；It is more economical flammable that the main combustion gas can be other
Property gas, such as natural gas, manufactured gas, manufactured fuel gas, liquefied petroleum gas, biogas or coal gas etc., so that it is jointly sharp with combustion gas to reach coal dust
With.The oxidant gas is air or oxygen.
Preferably, the coal dust manifold type burner further includes filling to provide the oxidant of oxidant gas
It sets, the pulverizer coal feeder to provide coal dust and to provide the combustion gas gas cylinder of combustion gas；
The oxidant generating device is combustion gas oxidation for the pipeline that the Flameless gas burner provides oxidant gas
Agent pipeline is wind path of coal dust to carry coal dust to provide the pipeline of oxidant gas, is the oxygen of the coal dust flameless burner
The pipeline that agent nozzle provides oxidant gas is coal powder second wind path；The combustion gas oxidant pipeline, wind path of coal dust and
It include pressure fan on coal powder second wind path, and the pressure fan on the combustion gas oxidant pipeline and coal powder second wind path is
Booster fan；
The pulverizer coal feeder to tube cell road with wind path of the coal dust by connecting；The combustion gas gas cylinder passes through fuel gas pipeline
It is connect with the Flameless gas burner, includes flowmeter on the fuel gas pipeline.
It is further preferred that gas combustion chamber's exhanst gas outlet is additionally provided at the top of the gas combustion chamber, the coal dust combustion
It burns room bottom and is provided with the pulverized coal combustor exhanst gas outlet through the gas combustion chamber bottom；
In the fuel gas buring room and the flue gas of coal dust firing Indoor Combustion generation passes through gas combustion chamber's cigarette respectively
Gas outlet and the export of pulverized coal combustor exhanst gas outlet, two-way flue gas are divided into flue gas recirculation wind path one, flue gas recirculation wind path after merging
Two and smoke evacuation wind path；The flue gas recirculation wind path one is connect with wind path of coal dust, after circulating flue gas is mixed with oxidant gas
(oxidant gas of referred to as First air, secondary wind path is known as Secondary Air) carries coal dust and enters the fuel nozzle；The flue gas
Circulating air duct two and the combustion gas oxidant piping connection, circulating flue gas enter oxygen in the combustion gas after mixing with oxidant gas
Agent jet pipe or external oxidation agent jet pipe；The smoke evacuation wind path is connect with smoke processing system, carries out processing heel row to remaining flue gas
It puts；
The pressure fan of the combustion gas oxidant pipeline and coal dust First air road is arranged at mixed with circulating flue gas
On pipeline.
Preferably, the smoke processing system includes the boiler water film dust-remover, flue gas condenser, air-introduced machine set gradually
And smoke outlet, remaining flue gas passed sequentially through under the action of the air-introduced machine boiler water film dust-remover and flue gas condenser into
It is discharged after row processing by the smoke outlet.
Preferably, the pulverized coal combustor is fixedly connected on centre in the fuel gas buring room by fixedly connected part；
The Flameless gas burner and gas combustion chamber's exhanst gas outlet are separately mounted to opposite two at the top of gas combustion chamber
At a quarter of side to one third distance；The coal dust flameless burner is pacified through fuel gas buring indoor top center
Load connects the center of top with the pulverized coal combustor.
Preferably, the gas combustion chamber and pulverized coal combustor are independently square or sphere structure.
Preferably, gas combustion chamber's outer wall materials use aluminium oxide pouring material or other fire proofed woods that can be kept the temperature
Material；
The coal dust flameless burner and pulverized coal combustor are used as and are managed using corundum or other materials for being resistant to 1600 DEG C
Material.
Another aspect of the present invention also provides a kind of coal dust combustion method, comprising the following steps: passes through preheated fuel gas pair first
Gas combustion chamber is preheated, and oxidant gas is entered by the internal oxidition agent pipe of Flameless gas burner at this time；Preheating finishes
Afterwards, preheated fuel gas is cut off, is passed through main combustion gas, and oxidant is switched into the external oxidation agent pipe entrance by Flameless gas burner,
Main combustion gas spontaneous combustion, flame front disappears to form flameless combustion after the combustion is stabilized, uniform distribution of temperature field, while to coal dust firing
Room radiations heat energy, preheats pulverized coal combustor；After pulverized coal combustor preheats, coal dust is passed through by oxidant gas carrying
The fuel nozzle of coal dust flameless burner enters pulverized coal combustor, is led in the form of high-speed jet after simultaneous oxidation agent gas pressurized
The oxidant nozzle for crossing coal dust flameless burner enters pulverized coal combustor, and volume inhales a large amount of flue gases formation hypothermia and hypoxias while combustion-supporting
Atmosphere makes coal dust carry out stable flameless combustion in the combustion chamber.
Preferably, the air outlet velocity of the fuel nozzle of the coal dust flameless burner is 10~20m/s, the coal dust nonflame
The air outlet velocity of the oxidant nozzle of burner is 100~200m/s.
The present invention takes above technical scheme, has the advantages that
The homogeneous temperature field generated by combustion gas flameless combustion carries out auxiliary heat to coal dust firing as heat source, while using combustion gas
The flue gas recycled that flameless combustion generates carries out mixing the First air as coal dust firing with oxidant gas, further increases one
The temperature of secondary wind simultaneously enhances and fires reduction again to coal dust, and coal dust is made to stablize oxidation under the atmosphere of hypothermia and hypoxia, a large amount of to drop
Low-heat power type and fuel type NOxGeneration, and enhance to the reduction of NO, to realize the ultralow of coal dust firing nitrogen oxides
Discharge.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of double manifold type burners in the preferred embodiment of the present invention.
Fig. 2 is the structural schematic diagram of the Flameless gas burner during the present invention is preferably implemented.
Fig. 3 is A in Fig. 2 to schematic diagram.
Fig. 4 is the structural schematic diagram of the coal dust flameless burner during the present invention is preferably implemented.
Fig. 5 is B in Fig. 4 to schematic diagram.
Fig. 6 is the structural schematic diagram of the combustion chamber during the present invention is preferably implemented.
Description of symbols:
1- combustion gas oxidant pressure fan, 2- pulverizer coal feeder, 3- coal powder second wind pressure fan, 4- coal dust First air pressure fan, 5-
Air, 6- flowmeter, 7- combustion gas gas cylinder, 8- gas combustion chamber, 9- pulverized coal combustor, 10- boiler water film dust-remover, 11- flue gas
Condenser, 12- air-introduced machine, 13- smoke outlet, 14- fuel gas pipeline, 15- combustion gas oxidant pipeline, 16- give tube cell road, 17- coal dust
Wind path, 18- coal powder second wind path, 19- gas combustion chamber flue gas pipeline, 20- pulverized coal combustor flue gas pipeline, 21- flue gas
Circulating air duct one, 22- flue gas recirculation wind path two, 23- smoke evacuation wind path.
24- exhaust gas nozzle, the main fuel gas inlet of 241-, 242- preheated fuel gas entrance, 25- internal oxidition agent nozzle, 251- oxidation
Agent entrance one, 26- external oxidation agent nozzle, 261- oxidant inlet two, 27- guide vane, 28- smooth-bore tip, 29 flame holders.
30- fuel nozzle, 301- coal dust and First air entrance, 31- oxidant nozzle, 311- Secondary Air entrance.
32- Flameless gas burner, 33- coal dust flameless burner, 34- gas combustion chamber exhanst gas outlet, 35- fuel gas buring
Room, 36- pulverized coal combustor exhanst gas outlet, 37- pulverized coal combustor, 38- fixedly connected part.
Specific embodiment
In order to illustrate more clearly of the present invention, below with reference to preferred embodiment, the present invention is described further.Ability
Field technique personnel should be appreciated that following specifically described content is illustrative and be not restrictive, this should not be limited with this
The protection scope of invention.
In addition, in the following detailed description, convenient for explaining, to elaborate many concrete details to provide to draping over one's shoulders herein
The comprehensive understanding of the embodiment of dew.It should be apparent, however, that one or more embodiments are without these specific details
It can be carried out.In other cases, well known construction and device is diagrammatically embodied to simplify attached drawing.In the present invention
Embodiment in some nouns of locality for being previously mentioned, such as "left", "right", " top ", " bottom " etc., the meaning of these nouns of locality with
The placement situation of device is related, should not be construed as limiting the scope of the invention.
The present invention provides a preferred embodiment, as shown in Figure 1, the double manifold type burners of the coal dust mainly include combustion gas
Combustion chamber 8, pulverized coal combustor 9 and flue gas pipeline.
The gas combustion chamber 8 is equipped with Flameless gas burner.The exhaust gas nozzle and fuel gas conduit of Flameless gas burner
Road 14 connects, and includes flowmeter 6 on fuel gas pipeline 14, provides combustion gas by combustion gas gas cylinder 7 by adjusting flowmeter 6, combustion gas without
The internal oxidition agent nozzle and external oxidation agent nozzle of flame burner are connect with combustion gas oxidant pipeline 15, can be switched over.It is empty
Gas 5 is sent into oxidant nozzle by combustion gas oxidant pressure fan 1, and combustion gas oxidant pressure fan 1 is booster fan, is added by boosting
It is combustion-supporting that speed carries out air 5 with the form feeding gas combustion chamber 8 of high-speed jet (100-150m/s).
The pulverized coal combustor 9 is equipped with coal dust flameless burner.The fuel nozzle and coal dust one of coal dust flameless burner
Secondary wind path 17 is attached, and coal dust First air is mixed by the circulating flue gas of air 5 and flue gas recirculation wind path 1, once
Wind is blown by coal dust First air pressure fan 4, is carried pulverizer coal feeder 2 by the coal dust come out to tube cell road 16, is sent into coal dust
It burns combustion chamber 9.The oxidant nozzle of coal dust flameless burner is attached with coal powder second wind path 18, passes through coal dust two
Secondary wind pressure fan 3 is blown, and coal powder second wind pressure fan 3 is booster fan, accelerates to make Secondary Air with high rapid fire by boosting
The form feeding pulverized coal combustor 9 of stream (100-150m/s) carries out combustion-supporting.
The flue gas pipeline includes gas combustion chamber's flue gas pipeline 19, pulverized coal combustor flue gas pipeline 20, flue gas recirculation wind
Road 1, flue gas recirculation wind path 2 22, smoke evacuation wind path 23 and smoke processing system.Gas combustion chamber's flue gas pipeline 19 and coal dust
Gas fume of combustion chamber pipeline 20 is divided into three branches after collecting: flue gas recirculation wind path 1 is attached with wind path 17 of coal dust,
Flue gas recirculation wind path 2 22 is attached with combustion gas oxidant pipeline 15, and smoke evacuation wind path 23 is attached with smoke processing system.
By the effect of air-introduced machine 12 pass sequentially through boiler water film dust-remover 10 and flue gas condenser 11 handled after by smoke outlet
13 discharges.
Fig. 2 and Fig. 3 is the structural schematic diagram of the Flameless gas burner in this preferred embodiment, the combustion gas flameless combustion
Device is located at gas combustion chamber's upper left a quarter distance, including exhaust gas nozzle 24, internal oxidition agent pipe 25 and external oxidation
Agent pipe 26；
The exhaust gas nozzle 24 is F type pipe, and two bending places are main fuel gas inlet 241 and preheated fuel gas entrance 242 respectively,
Exit is provided with flame holder 29；
The internal oxidition agent pipe 25 is L-type pipe, is nested in outside the exhaust gas nozzle 24, and circumferential weld between the two is as oxidation
Agent channel is provided with guide vane 27 in channel；
26 main body of external oxidation agent pipe is L-type pipe, is nested in outside the internal oxidition agent pipe 25, on L-type pipe exit edge
It is circumferentially uniformly arranged and is communicated with several smooth-bore tips 28 (being more than or equal to 4, the present embodiment takes 4) to go out as external oxidation agent pipe
Mouthful, the exit end face of smooth-bore tip 28 is concordant with internal oxidition agent 25 exit end faces of pipe；
Preheated fuel gas is passed through by the preheated fuel gas entrance and is preheated to the gas combustion chamber, at this time oxidant gas
Body is passed through by internal oxidition agent pipe；After preheating, preheated fuel gas is cut off, main combustion gas is passed through by the main fuel gas inlet, and
Oxidant gas is switched to and is passed through by the external oxidation agent pipe, main combustion gas spontaneous combustion, flame front disappearance shape after the combustion is stabilized
At flameless combustion, uniform distribution of temperature field, while to pulverized coal combustor radiations heat energy, pulverized coal combustor is preheated.
Fig. 4 and Fig. 5 is the structural schematic diagram of the coal dust flameless burner in this preferred embodiment, the coal dust flameless combustion
Device passes through gas combustion chamber and is mounted on pulverized coal combustor upper center, including fuel nozzle 30 and the circular fuel nozzle 30
Several oxidant nozzles 31 (being more than or equal to 4, the present embodiment takes 4) being evenly arranged；
Coal dust, which is carried by oxidant gas from the coal dust and First air entrance 301 of the fuel nozzle 30, enters the coal
Powder combustion chamber；Simultaneous oxidation agent gas passes through the Secondary Air of the oxidant nozzle 31 after pressurization in the form of high-speed jet
Entrance 311 enters the pulverized coal combustor, and coal dust is made to carry out flameless combustion in the combustion chamber.
Fig. 6 is the structural schematic diagram of combustion chamber, including gas combustion chamber 35 and pulverized coal combustor 37.The gas combustion chamber
35 be square or sphere structure, an intracavitary nested pulverized coal combustor 37, cavity space by gas combustion chamber inner wall and coal dust
The outer wall of combustion chamber surrounds.Pulverized coal combustor 37 is fixedly connected in fuel gas buring room by fixedly connected part 38.Fuel gas buring
Room upper left is equipped with Flameless gas burner 32, and upper center is run through by the coal dust flameless burner 33 of pulverized coal combustor,
Upper right is equipped with exhanst gas outlet 34, and lower section is run through by the exhanst gas outlet 36 of pulverized coal combustor.
The present embodiment passes through preheated fuel gas first and preheats to gas combustion chamber, at this time oxidant gas by combustion gas without
The internal oxidition agent pipe of flame burner enters；After preheating, preheated fuel gas is cut off, is passed through main combustion gas, and oxidant is switched to
Entered by the external oxidation agent pipe of Flameless gas burner, main combustion gas spontaneous combustion, flame front disappears to form stabilization after the combustion is stabilized
Flameless combustion, uniform distribution of temperature field fires coal dust between 1000-1300K, while to pulverized coal combustor radiations heat energy
Room is burnt to be preheated；And coal dust is carried along into pulverized coal combustor by First air, after Secondary Air carries out pressurized treatments by high pressure blower
Volume smoking gas forms hypoxemia atmosphere while entering the requirement of pulverized coal combustor supplemental oxidant gas with very high velocity jet.
So that coal dust is carried out flameless combustion in the combustion chamber, realizes the oxidation reaction under hypothermia and hypoxia atmosphere.And gas smoke evacuation flue gas
Recycling is carried out with a part of coal dust combustion product gases, thus enhances NO reduction.This implementation resultant effect, can reach
Less than 50mg/m3Ultralow NOxDischarge.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention may be used also on the basis of the above description for those of ordinary skill in the art
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is all to belong to this hair
The obvious changes or variations that bright technical solution is extended out are still in the scope of protection of the present invention.
Claims (10)
1. a kind of coal dust manifold type burner, which is characterized in that the device includes gas combustion chamber and is arranged in the combustion gas
Burn indoor pulverized coal combustor；
Flameless gas burner is installed at the top of the gas combustion chamber；Combustion gas is by the Flameless gas burner described
Intracavitary carry out flameless combustion in fuel gas buring room, outside coal dust firing room；
Coal dust flameless burner is installed, the coal dust flameless burner is fired through the combustion gas at the top of the pulverized coal combustor
Burn ceiling portion；Coal dust carries out flameless combustion in the coal dust firing room by the coal dust flameless burner.
2. coal dust manifold type burner according to claim 1, which is characterized in that the Flameless gas burner includes
Exhaust gas nozzle, internal oxidition agent pipe and external oxidation agent pipe；
The exhaust gas nozzle is F type pipe, and two bending places are main fuel gas inlet and preheated fuel gas entrance respectively, and exit is provided with
Flame holder；
The internal oxidition agent pipe is L-type pipe, is nested in outside the exhaust gas nozzle, circumferential weld between the two as oxidant channel,
Guide vane is provided in channel；
The external oxidation agent pipe main body is L-type pipe, is nested in outside the internal oxidition agent pipe, circumferentially uniform in L-type pipe exit
It is arranged and is communicated with several smooth-bore tips and exported as external oxidation agent pipe, the exit end face and internal oxidition agent pipe of smooth-bore tip exports
End face is concordant；
Preheated fuel gas is passed through by the preheated fuel gas entrance and is preheated to the gas combustion chamber, and oxidant gas is logical at this time
Internal oxidition agent pipe is crossed to be passed through；After preheating, preheated fuel gas is cut off, main combustion gas is passed through by the main fuel gas inlet, and by oxygen
Oxidant gas is switched to be passed through by the external oxidation agent pipe, and main combustion gas spontaneous combustion, flame front disappears to form nothing after the combustion is stabilized
Flame burning, uniform distribution of temperature field, while to pulverized coal combustor radiations heat energy, pulverized coal combustor is preheated.
3. coal dust manifold type burner according to claim 2, which is characterized in that the coal dust flameless burner includes
Fuel nozzle and several oxidant nozzles being evenly arranged around the fuel nozzle；
Coal dust, which is carried by oxidant gas from the fuel nozzle, enters the pulverized coal combustor；Simultaneous oxidation agent gas passes through
After pressurization in the form of high-speed jet by the oxidant nozzle enter the pulverized coal combustor, make coal dust in the combustion chamber into
Row flameless combustion.
4. coal dust manifold type burner according to claim 3, which is characterized in that the Flameless gas burner it is straight
The bore d1 of flow nozzle is 0.1-0.3 times of internal oxidition agent nozzle exit internal diameter d2；
The pipe of the smooth-bore tip of the bore and Flameless gas burner of the oxidant nozzle of the coal dust flameless burner
Internal diameter is identical；
Preferably, the smooth-bore tip and oxidant nozzle are all larger than equal to 4；
Preferably, the preheated fuel gas is methane gas or hydrogen；The main combustion gas is natural gas, manufactured gas, manufactured fuel gas, liquefied petroleum
Gas, biogas or coal gas；The oxidant gas is air or oxygen.
5. coal dust manifold type burner according to claim 4, which is characterized in that the coal dust manifold type burner
It further include to provide the oxidant generating device of oxidant gas, the pulverizer coal feeder to provide coal dust and to provide combustion gas
Combustion gas gas cylinder；
The oxidant generating device is combustion gas oxidant pipe for the pipeline that the Flameless gas burner provides oxidant gas
Road is wind path of coal dust to carry coal dust to provide the pipeline of oxidant gas, is the oxidant of the coal dust flameless burner
The pipeline that nozzle provides oxidant gas is coal powder second wind path；The combustion gas oxidant pipeline, wind path of coal dust and coal dust
Secondary Air road includes pressure fan, and the pressure fan on the combustion gas oxidant pipeline and coal powder second wind path is pressurization
Blower；
The pulverizer coal feeder to tube cell road with wind path of the coal dust by connecting；The combustion gas gas cylinder passes through fuel gas pipeline and institute
Flameless gas burner connection is stated, includes flowmeter on the fuel gas pipeline.
6. coal dust manifold type burner according to claim 5, which is characterized in that also set at the top of the gas combustion chamber
It is equipped with gas combustion chamber's exhanst gas outlet, the pulverized coal combustor bottom is provided with the coal dust combustion through the gas combustion chamber bottom
Burn room exhanst gas outlet；
Pass through gas combustion chamber's flue gas respectively with the flue gas of coal dust firing Indoor Combustion generation in the fuel gas buring room and go out
Mouth and the export of pulverized coal combustor exhanst gas outlet, two-way flue gas are divided into flue gas recirculation wind path one, two and of flue gas recirculation wind path after merging
Smoke evacuation wind path；The flue gas recirculation wind path one is connect with wind path of coal dust, and circulating flue gas carries after mixing with oxidant gas
Coal dust enters the fuel nozzle；The flue gas recirculation wind path two and the combustion gas oxidant piping connection, circulating flue gas and oxygen
Enter the combustion gas internal oxidition agent jet pipe or external oxidation agent jet pipe after oxidant gas mixing；The smoke evacuation wind path and fume treatment system
System connection, is discharged after handling remaining flue gas；
The pressure fan of the combustion gas oxidant pipeline and coal dust First air road is arranged at and the mixed pipeline of circulating flue gas
On.
7. coal dust manifold type burner according to claim 6, which is characterized in that the smoke processing system include according to
Boiler water film dust-remover, flue gas condenser, air-introduced machine and the smoke outlet of secondary setting, remaining flue gas is under the action of the air-introduced machine
Pass sequentially through the boiler water film dust-remover and flue gas condenser handled after be discharged by the smoke outlet.
8. coal dust manifold type burner according to claim 6, which is characterized in that the pulverized coal combustor passes through fixation
Connector is fixedly connected on centre in the fuel gas buring room；
The Flameless gas burner and gas combustion chamber's exhanst gas outlet are separately mounted to opposite sides at the top of gas combustion chamber
At a quarter to one third distance；The coal dust flameless burner connects through the installation of fuel gas buring indoor top center
Connect the center of top with the pulverized coal combustor.
9. coal dust manifold type burner according to claim 1, which is characterized in that the gas combustion chamber and coal dust combustion
Burning room is independently square or sphere structure；
Preferably, gas combustion chamber's outer wall materials use aluminium oxide pouring material；
The coal dust flameless burner and pulverized coal combustor use corundum.
10. a kind of coal dust combustion method carried out using any one of the claim 1-9 coal dust manifold type burner, special
Sign is, comprising the following steps: is preheated first by preheated fuel gas to gas combustion chamber, oxidant gas passes through combustion at this time
The internal oxidition agent pipe of gas flameless burner enters；After preheating, preheated fuel gas is cut off, is passed through main combustion gas, and oxidant is cut
Change the external oxidation agent pipe entrance by Flameless gas burner into, main combustion gas spontaneous combustion, flame front disappears to be formed after the combustion is stabilized
Flameless combustion, uniform distribution of temperature field, while to pulverized coal combustor radiations heat energy, pulverized coal combustor is preheated；Coal dust combustion
After burning room preheating, coal dust is carried by oxidant gas enters coal dust firing by the fuel nozzle of coal dust flameless burner
Room enters coal dust by the oxidant nozzle of coal dust flameless burner in the form of high-speed jet after simultaneous oxidation agent gas pressurized
Combustion chamber makes coal dust carry out flameless combustion in the combustion chamber；
Preferably, the air outlet velocity of the fuel nozzle of the coal dust flameless burner is 10~20m/s, the coal dust flameless combustion
The air outlet velocity of the oxidant nozzle of device is 100~200m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910193619.1A CN109827168B (en) | 2019-03-14 | 2019-03-14 | Coal powder coupled combustion device and combustion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910193619.1A CN109827168B (en) | 2019-03-14 | 2019-03-14 | Coal powder coupled combustion device and combustion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109827168A true CN109827168A (en) | 2019-05-31 |
| CN109827168B CN109827168B (en) | 2024-01-30 |
Family
ID=66869011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910193619.1A Active CN109827168B (en) | 2019-03-14 | 2019-03-14 | Coal powder coupled combustion device and combustion method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109827168B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425518A (en) * | 2019-07-26 | 2019-11-08 | 华中科技大学 | A kind of realization NOxThe flameless combustion heating boiler system of near-zero release |
| CN114112407A (en) * | 2021-12-02 | 2022-03-01 | 内蒙动力机械研究所 | Powder detonation engine conveying system and method |
| CN116839055A (en) * | 2023-05-19 | 2023-10-03 | 天津大学 | Solid fuel flameless combustion flue gas baking and recycling system and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201787569U (en) * | 2010-09-14 | 2011-04-06 | 天津市汉沽区中兴修造厂 | Cold-state pulverized coal burner |
| CN102418997A (en) * | 2011-11-24 | 2012-04-18 | 舒瑞 | Combustion method and device for pulverized coal hot air furnace |
| CN103307595A (en) * | 2013-06-25 | 2013-09-18 | 山西蓝天环保设备有限公司 | Device and method for expanding types of coal suitable for small and medium-sized industrial pulverized coal boilers |
| CN103697469A (en) * | 2013-11-20 | 2014-04-02 | 西安交通大学 | Pulverized coal flame preheating low NOx burner system |
| CN103940080A (en) * | 2014-04-30 | 2014-07-23 | 江苏大峘集团有限公司 | Medium-temperature and low-oxygen-content hot blast stove based on coal dust low-oxygen combustion technology |
| CN209960476U (en) * | 2019-03-14 | 2020-01-17 | 华中科技大学 | Pulverized coal coupled combustion device |
-
2019
- 2019-03-14 CN CN201910193619.1A patent/CN109827168B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201787569U (en) * | 2010-09-14 | 2011-04-06 | 天津市汉沽区中兴修造厂 | Cold-state pulverized coal burner |
| CN102418997A (en) * | 2011-11-24 | 2012-04-18 | 舒瑞 | Combustion method and device for pulverized coal hot air furnace |
| CN103307595A (en) * | 2013-06-25 | 2013-09-18 | 山西蓝天环保设备有限公司 | Device and method for expanding types of coal suitable for small and medium-sized industrial pulverized coal boilers |
| CN103697469A (en) * | 2013-11-20 | 2014-04-02 | 西安交通大学 | Pulverized coal flame preheating low NOx burner system |
| CN103940080A (en) * | 2014-04-30 | 2014-07-23 | 江苏大峘集团有限公司 | Medium-temperature and low-oxygen-content hot blast stove based on coal dust low-oxygen combustion technology |
| CN209960476U (en) * | 2019-03-14 | 2020-01-17 | 华中科技大学 | Pulverized coal coupled combustion device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425518A (en) * | 2019-07-26 | 2019-11-08 | 华中科技大学 | A kind of realization NOxThe flameless combustion heating boiler system of near-zero release |
| CN114112407A (en) * | 2021-12-02 | 2022-03-01 | 内蒙动力机械研究所 | Powder detonation engine conveying system and method |
| CN114112407B (en) * | 2021-12-02 | 2023-11-03 | 内蒙动力机械研究所 | Powder detonation engine conveying system and method |
| CN116839055A (en) * | 2023-05-19 | 2023-10-03 | 天津大学 | Solid fuel flameless combustion flue gas baking and recycling system and method |
| CN116839055B (en) * | 2023-05-19 | 2024-10-01 | 天津大学 | Solid fuel flameless combustion flue gas baking and recycling system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109827168B (en) | 2024-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106287667B (en) | A kind of high temperature gases recirculating preheating type low-NOx combustor equipped with SOFA | |
| CN205504983U (en) | Gas recirculation low NOx burner in combustion -supporting wind injection type stove | |
| CN107355776B (en) | Combustion System of Boiler Burning Fine, method and the application of ultra-low NOx emission | |
| CN206112921U (en) | Multistage air distribution's low NOx burner | |
| CN109827168A (en) | A kind of coal dust manifold type burner and combustion method | |
| US20120129111A1 (en) | Premix for non-gaseous fuel delivery | |
| CN105674257B (en) | A kind of adjustable water-vapor plasma turbulent burner of two-stage | |
| WO2019052573A1 (en) | Energy-saving and environment-friendly combustion system for flue gas combustion-supporting industrial furnace | |
| CN108870383A (en) | A kind of pulverized-coal fired boiler low NOx combustion system | |
| CN103267303A (en) | NOx generation reducing method for four-corner tangential boiler of thermal power plant | |
| CN208901372U (en) | A kind of pulverized-coal fired boiler low NOx combustion system | |
| CN106500094B (en) | A kind of low nitrogen gradual combustor of high temperature smoke gas circulating type and technique | |
| CN205119061U (en) | Gas fractional combustion ware | |
| CN105605560B (en) | Micro- discharge pulverized coal combustion system | |
| CN104154532A (en) | Center air ring concentrated type turbulent burner | |
| CN206130963U (en) | Low NOx combustor of high temperature flue gas backward flow pre -burning formula with SOFA | |
| CN104132343B (en) | A kind of radiant tube burner | |
| CN206786717U (en) | A kind of two-chamber combustion gas low nitrogen burning machine | |
| CN205402704U (en) | Two -stage adjustable steam plasma cyclone burner | |
| CN109442391A (en) | It is a kind of to be simple and efficient low-nitrogen discharged grate firing boiler | |
| CN109945212A (en) | A kind of low-heating-value gas burner and combustion method | |
| CN203036634U (en) | Fractional combustion low-nitrogen oxide rotational flow burner | |
| CN201964411U (en) | High-power double-cyclone burning semi-premix gas burner | |
| CN208418701U (en) | A kind of low-NOx combustor for biomass and combustion of natural gas | |
| CN103398397A (en) | Combustion system of boiler and combustion method implemented by aid of system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |