CN105841147A - Oxygen-enriched coal powder backflow premix burner - Google Patents
Oxygen-enriched coal powder backflow premix burner Download PDFInfo
- Publication number
- CN105841147A CN105841147A CN201610390819.2A CN201610390819A CN105841147A CN 105841147 A CN105841147 A CN 105841147A CN 201610390819 A CN201610390819 A CN 201610390819A CN 105841147 A CN105841147 A CN 105841147A
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- China
- Prior art keywords
- backflow
- oxygen
- coal dust
- oil gun
- air
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2201/00—Burners adapted for particulate solid or pulverulent fuels
- F23D2201/20—Fuel flow guiding devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2207/00—Ignition devices associated with burner
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention belongs to the field of fuel coal burners and particularly relates to an oxygen-enriched coal powder backflow premix burner. A burner body comprises an oil gun. The oil gun is sleeved with a primary air pipe which is sleeved with a secondary air pipe. The oxygen-enriched coal powder backflow premix burner further comprises a backflow cap and an ignition gun. The backflow cap covers an air outlet of a primary air cylinder, and a gap is reserved between the backflow cap and the primary air cylinder to form a backflow channel. A through hole is formed in the center of the backflow cap. The oil gun penetrates out of the primary air pipe and is inserted in the through hole. A gap is reserved between the oil gun and the through hole to form an air powder channel. The oil gun, the primary air cylinder, a secondary air cylinder and the backflow cap are located on the same axial lead. The ignition gun is fixed to the outer wall of the burner body and is inserted in the secondary air pipe. An ignition gun spraying opening is close to an oil gun spraying opening. The secondary air pipe is divided into a conveying area and a burning area. The oil gun, the primary air pipe and the backflow pipe are located in the conveying area. The ignition gun spraying opening is located in the burning area. The oxygen-enriched coal powder backflow premix burner has the beneficial effects that the coal type adaptability is wide, ignition energy is saved or is not needed, burning is controllable, and the coal powder burnout rate is high.
Description
Technical field
The invention belongs to coal-fired combusting device field, specifically, particularly to a kind of oxygen-rich coal dust backflow premix burner.
Background technology
In prior art, it is limited to the impact that coal burner internal-combustion space is less and powder feed rate very fast (preventing stifled powder etc.), make coal dust firing deficiency of time, especially for low volatile coal, coal dust burn-off rate is relatively low, after after being likely to result in coal dust firing, unburned carbon in flue dust is higher, moreover the coal dust the most fully caught fire enters burner hearth, it is impossible to burn efficiently to improve fire box temperature, meet combustion requirements.
For solving the problems referred to above, usual manner is the powder feed rate in an air duct that slows down, but which easily causes an air duct accumulated powder, blocks pipeline, has a strong impact on boiler operatiopn, and the method is infeasible.
Now it is considered as a kind of device to meet normal speed powder feeding, the purpose that quick burning of waiting a moment burns.
Summary of the invention
For solving above technical problem, it is an object of the invention to provide one oxygen-rich coal dust of the present invention backflow premix burner, it has, and coal adaptability is extensive, save or be not required to the light a fire energy, feature controlled, that coal dust burn-off rate is high of burning.
The object of the invention is realized in: a kind of oxygen-rich coal dust backflow premix burner, burner body includes oil gun, this oil gun overcoat once airduct, is cased with secondary air channel outside this primary air piping；Also include reflux cap and burning torch, described backflow calotte leaves formation return flow line, gap at an air duct air outlet and with an air duct, described backflow cap center has through hole, oil gun passes primary air piping and inserts in through hole, leaving gap between oil gun and through hole and form wind powder passage, described oil gun, air duct, secondary air duct and backflow cap are on same axial line；Described burning torch is fixed on burner body outer wall, and inserts in secondary air channel, and burning torch spout is near oil gun spout.
Preferably, an air duct conveying First air coal dust, secondary air duct feeding secondary wind, the oil gun conveying igniting energy；Described secondary air channel is divided into delivery area and combustion zone, oil gun, primary air piping and backflow cap to be respectively positioned in delivery area, and burning torch spout is positioned at combustion zone.
Preferably, First air coal dust is the mixture of coal dust and air, and secondary wind is air, and the igniting energy is oil or gas or high-temperature gas.
A part of First air coal dust in the most described air duct is fed forward by wind powder passage, another part First air coal dust in a described air duct is refluxed after cap stops and is refluxed to secondary air duct by return flow line, it is mixed in secondary air duct and carries at a slow speed with before secondary wind direction, after flowing through backflow cap front end, the First air coal dust of backflow and wind powder channel outlet premixes again, and is continued to be fed forward at a slow speed by after the ignition energy source point combustion of oil gun.
Using said structure, First air bobbin footpath is less than secondary wind bobbin footpath, and in an air duct, First air coal dust flow velocity is fast, sends into secondary wind flow velocity slow in secondary air duct.Owing to being provided with backflow cap at an air duct air outlet, thus First air coal dust is caused to be divided into two wind directions: a part flows out from wind powder passage, and another part backflow is mixed into secondary air duct.First air coal dust is refluxed cap stop and slows down immediately after spraying from an air duct, it is driven to continue conveying by the wind at a slow speed in secondary air duct, after flowing through backflow cap front end, the First air coal dust of backflow and wind powder channel outlet premixes again, and is continued to be fed forward at a slow speed by after the ignition energy source point combustion of oil gun.The flow velocity of First air coal dust can be effectively reduced by this structure, reached the effect burnt at a slow speed, avoid First air cylinder line clogging, it is thus achieved that more efficient burn-off rate simultaneously.Even low volatile coal can also be burnt more abundant.
Preferably, oil gun overcoat aerobic pipe I, oil gun spout and oxygen pipe I front end flush, and oxygen pipe I front end is provided with air outlet, oxygen pipe I overcoat aerobic pipe II, and oxygen pipe II is through on the tube wall in wind powder passage and has at least 2 air outlets；Oxygen pipe I and oxygen pipe II all carry oxygen, the oxygen in oxygen pipe I and igniting energy premix, the oxygen in oxygen pipe II and the coal dust premix in wind powder passage.
Using said structure, oxygen pipe I is to energy burning oxygen supply of lighting a fire in oil gun so that it is fully burning forms high temp fire core；Oxygen pipe II is to the First air coal dust oxygen supply in wind powder passage, premix with First air coal dust, form oxygen-rich coal dust stream, the ignition point making oxygen-rich coal dust stream reduces, it is more prone to ignite, in combustion zone, high temp fire core ignites oxygen-rich coal dust stream, oxygen-rich coal dust stream ignite further that carried by secondary wind, flow through the coal dust of backflow cap front end backflow, finally ignite whole coal dust.
Preferably, also including cyclone, cyclone is positioned on the secondary air channel of delivery area, the anglec of rotation of adjustable second wind and intensity.
Using said structure, cyclone can regulate the swirl strength of secondary wind, the cyclone First air coal dust flowing back into secondary air channel can be driven to be also carried out eddy flow simultaneously.Make First air coal dust and secondary wind premix more thorough, and produce volume suction effect, the length of flame can be regulated by cyclone.
Preferably, the combustion zone of described secondary air channel starts to be divided into leading portion, stage casing, back segment near side, delivery area；Described leading portion caliber is maximum, and stage casing is tapered shape, and back segment caliber is minimum.
Using said structure, burner stage casing is arranged to tapering shape, and the heat in the leading portion of combustion zone can be made to assemble, it is not easy to loss, thus improves the temperature of burning.When temperature is sufficiently high, the specking fire energy that oil gun can be interrupted need not be supplied after the most surely firing, and saves the igniting energy.
Preferably, the combustion zone of described secondary air channel starts to be divided into leading portion, stage casing, back segment near side, delivery area；On described leading portion, fire monitor equipment is installed.
Use said structure, use the flame combustion situation in fire monitor equipment detection burner.
Preferably, being provided with cylinder by described burning torch, the piston rod of cylinder drives burning torch put in secondary air channel and stretch out.
Use said structure, when burner combustion district is in stable burning, burning torch can be extracted out, it is to avoid burning torch is chronically in high temperature.
Preferably, described secondary air channel outer wall is also cased with circumference airduct, and described circumference airduct covers whole combustion zone and part delivery area.
Using said structure, burner is when burning, and in combustion zone, temperature is the highest, and arranging circumference airduct can carry out overtemperature protection to combustion zone and delivery area.
Beneficial effect:
At an air duct air outlet, it is provided with backflow cap, thus causes First air coal dust to be divided into two wind directions: a part flows out from wind powder passage, and another part backflow is mixed into secondary air duct.First air coal dust is refluxed cap stop and slows down immediately after spraying from an air duct, it is driven to continue conveying by the wind at a slow speed in secondary air duct, after flowing through backflow cap front end, the First air coal dust of backflow and wind powder channel outlet premixes again, and is continued to be fed forward at a slow speed by after the ignition energy source point combustion of oil gun.The flow velocity of First air coal dust can be effectively reduced by this structure, reached the effect burnt at a slow speed, avoid First air cylinder line clogging, it is thus achieved that more efficient burn-off rate simultaneously.Even low volatile coal can also be burnt more abundant.
Burner stage casing is arranged to tapering shape, and the heat in the leading portion of combustion zone can be made to assemble, it is not easy to loss, thus improves the temperature of burning.When temperature is sufficiently high, oil gun can be interrupted or stop the energy of lighting a fire, and need not persistently supply, and saves the energy.Fire monitor equipment can observe combustion case, when need not burning torch igniting, can be removed by burning torch by cylinder.This apparatus structure is ingenious simultaneously is easily installed, and later maintenance can also simply be changed.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention；
Fig. 2 is the oil gun of the embodiment of the present invention, the partial enlarged drawing of backflow cap；
Fig. 3 is the First air coal dust wind direction schematic diagram of the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Description only actually at least one exemplary embodiment is illustrative below, never as to the present invention and application thereof or any restriction of use.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.Simultaneously, it should be appreciated that for the ease of describing, the size of the various piece shown in accompanying drawing is not to draw according to actual proportionate relationship.May be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but in the appropriate case, described technology, method and apparatus should be considered to authorize a part for description.In shown here and all examples of discussing, any occurrence should be construed as merely exemplary rather than as limiting.Therefore, other example of exemplary embodiment can have different values.It should also be noted that similar label and letter represent similar terms in following accompanying drawing, therefore, the most a certain Xiang Yi accompanying drawing is defined, then need not it is further discussed in accompanying drawing subsequently.
For the ease of describing, here can use space relative terms, as " ... on ", " in ... top ", " at ... upper surface ", " above " etc., be used for describing such as a device shown in the figure or feature and other devices or the spatial relation of feature.It should be appreciated that space relative terms is intended to comprise the different azimuth in use or operation in addition to the orientation that device is described in the drawings.Such as, " below other devices or structure " or " under other devices or structure " will be positioned as after if the device in accompanying drawing is squeezed, being then described as the device of " above other devices or structure " or " on other devices or structure ".Thus, exemplary term " in ... top " can include " in ... top " and " in ... lower section " two kinds of orientation.This device can also other different modes location (rotation turn 90 degrees or be in other orientation), and space used herein above described relatively make respective explanations.
Embodiment one:As shown in Figure 1: can be seen that a kind of oxygen-rich coal dust backflow premix burner, burner body includes oil gun 1, these oil gun 1 overcoat once airduct 2, is cased with secondary air channel 3 outside this primary air piping 2；Also include reflux cap 5 and burning torch 7b, described backflow cap 5 covers on air duct 2 air outlet and leaves formation return flow line, gap 5b with an air duct 2, described backflow cap 5 center has through hole, oil gun 1 passes primary air piping 2 and inserts in through hole, leaving gap between oil gun 1 and through hole and form wind powder passage 5a, 1, air duct 2 of described oil gun, secondary air duct 3 and backflow cap 5 are on same axial line；Described burning torch 7b is fixed on burner body outer wall, and inserts in secondary air channel 3, and burning torch 7b spout is near oil gun 1 spout；Described secondary air channel 3 is divided into delivery area A and combustion zone B, oil gun 1, primary air piping 2 and backflow cap 5 to be respectively positioned in the A of delivery area, and burning torch 7b spout is positioned at combustion zone B.
Air duct 2 carries First air coal dust, secondary air duct 3 feeding secondary wind, the oil gun 1 conveying igniting energy.Wherein First air coal dust is the mixture of coal dust and air, and secondary wind is air, can be any gas that can provide burning air distribution for coal dust such as cold wind, hot blast or air wind, and the igniting energy be oil or gas or high-temperature gas.
Delivery area in secondary air channel is provided with cyclone.Cyclone can regulate the swirl strength of secondary wind, the cyclone First air coal dust flowing back into secondary air channel can be driven to be also carried out eddy flow simultaneously.Make premix First air coal dust and secondary wind premix more thorough, and produce volume suction effect.The length of flame can be regulated by cyclone.
Backflow cap is fixed by fixture and secondary air channel, and fixture can have 2 or multiple, and this fixture can be the gusset that heat resistant and wear resistant damages.Backflow cap is that the material of Wear-resistant, high-temperature resistant is made.
The combustion zone B of described secondary air channel 3 starts to be divided into leading portion, stage casing, back segment near A side, delivery area；Described leading portion caliber is maximum, and stage casing 10 is tapered shape, and back segment caliber is minimum.Burner stage casing is arranged to tapering shape, and the heat in the leading portion of combustion zone can be made to assemble, it is not easy to loss, thus improves the temperature of burning.When temperature is sufficiently high, the igniting energy that oil gun can be interrupted or stop, need not persistently supplying, save the fuel oil energy.Utilize the regulation effect of cyclone, the length of flame is regulated in delivery area A leading portion and stage casing, so can be easier to the recycling of heat.
The combustion zone B of described secondary air channel 3 starts to be divided into leading portion, stage casing, back segment near A side, delivery area；Fire monitor equipment 6 is installed on described leading portion.Use said structure, use the flame combustion situation in fire monitor equipment detection burner.
The piston rod being provided with cylinder 7a, cylinder 7a by described burning torch 7b drives burning torch 7b put in secondary air channel 3 and stretch out.When burner combustion district is in stable burning, burning torch can be extracted out, it is to avoid burning torch is chronically in high temperature.
Described secondary air channel 3 outer wall is also cased with circumference airduct 9, and described circumference airduct 9 covers whole combustion zone B and part delivery area A.Using said structure, burner is when burning, and in combustion zone, temperature is the highest, and arranging circumference airduct can carry out overtemperature protection to combustion zone and delivery area.
As shown in Figure 2,3, can be seen that the outer 1 set aerobic pipe I 11 of oil gun, oil gun 1 spout and oxygen pipe I 11 front end flush, and oxygen pipe I 11 front end is provided with air outlet, oxygen pipe I 11 overcoat aerobic pipe II 12, oxygen pipe II 12 is through on the tube wall in wind powder passage 5a and has at least 2 air outlet 12a；Oxygen pipe I 11 and oxygen pipe II 12 all carry oxygen.The internal diameter of wind powder passage 5a is more than the caliber of oxygen pipe II.Oxygen pipe II front end sets out air port, and the tube wall during only front end is through wind powder passage 5a has air outlet.Oil gun 1 spout and backflow cap front end flush.
First air coal dust run into backflow cap after movement locus, a part of First air coal dust in air duct 1 is fed forward by wind powder passage 5a, another part First air coal dust in a described air duct 1 is refluxed after cap 3 stops and is refluxed to secondary air duct 2 by return flow line 5b, it is mixed in secondary air duct 2 and carries at a slow speed with before secondary wind direction, the First air coal dust premix that backflow and wind powder passage 5a export again after flowing through cap 3 front end of refluxing, and continued to be fed forward at a slow speed by after the ignition energy source point combustion of oil gun.After mixed secondary wind flows through backflow cap 3 front end, the reason that again refluxes is: the static air of the secondary wind of flow forward and backflow cap front end exists pressure reduction, and under the effect of pressure reduction, mixed secondary wind refluxes the First air coal dust premix with wind powder passage air outlet again.
Finally it should be noted that; foregoing description is only the preferred embodiments of the present invention; those of ordinary skill in the art is under the enlightenment of the present invention; on the premise of present inventive concept and claim; represent, within such conversion each falls within protection scope of the present invention as can making multiple types.
Claims (10)
1. an oxygen-rich coal dust backflow premix burner, it is characterised in that: burner body includes oil gun (1), this oil gun (1) overcoat once airduct (2), is cased with secondary air channel (3) outside this primary air piping (2)；Also include reflux cap (5) and burning torch (7b), described backflow cap (5) covers on air duct (2) air outlet and leaves formation return flow line, gap (5b) with an air duct (2), described backflow cap (5) center has through hole, oil gun (1) passes primary air piping (2) and inserts in through hole, leaving gap between oil gun (1) and through hole and form wind powder passage (5a), described oil gun (1), air duct (2), secondary air duct (3) and backflow cap (5) are on same axial line；Described burning torch (7b) is fixed on burner body outer wall, and inserts in secondary air channel (3), and burning torch (7b) spout is near oil gun (1) spout.
A kind of oxygen-rich coal dust backflow premix burner, it is characterised in that: air duct (2) conveying First air coal dust, secondary air duct (3) feeding secondary wind, oil gun (1) the conveying igniting energy；Described secondary air channel (3) is divided into delivery area (A) and combustion zone (B), oil gun (1), primary air piping (2) and backflow cap (5) to be respectively positioned in delivery area (A), and burning torch (7b) spout is positioned at combustion zone (B).
A kind of oxygen-rich coal dust backflow premix burner, it is characterised in that: First air coal dust is the mixture of coal dust and air, and secondary wind is air, and the igniting energy is oil or gas or high-temperature gas.
A kind of oxygen-rich coal dust backflow premix burner, it is characterized in that: a part of First air coal dust in a described air duct (1) is fed forward by wind powder passage (5a), another part First air coal dust in a described air duct (1) is refluxed after cap (3) stops and is refluxed to secondary air duct (2) by return flow line (5b), it is mixed in secondary air duct (2) and carries at a slow speed with before secondary wind direction, the First air coal dust premix that backflow and wind powder passage (5a) export again after flowing through backflow cap (3) front end, and continue to be fed forward at a slow speed after being fired by the ignition energy source point of oil gun (1).
A kind of oxygen-rich coal dust backflow premix burner, it is characterized in that: oil gun (1) overcoat aerobic pipe I (11), oil gun (1) spout and oxygen pipe I (11) front end flush, oxygen pipe I (11) front end is provided with air outlet, oxygen pipe I (11) overcoat aerobic pipe II (12), oxygen pipe II (12) is through on the tube wall in wind powder passage (5a) and has at least 2 air outlets (12a)；Oxygen pipe I (11) and oxygen pipe II (12) all carry oxygen, the oxygen in oxygen pipe I (11) and igniting energy premix, the oxygen in oxygen pipe II (12) and the coal dust premix in wind powder passage (5a).
A kind of oxygen-rich coal dust backflow premix burner, it is characterised in that: also include that cyclone (4), cyclone (4) are positioned on the secondary air channel of delivery area (A), the anglec of rotation of adjustable second wind and intensity.
A kind of oxygen-rich coal dust backflow premix burner, it is characterised in that: the combustion zone (B) of described secondary air channel (3) starts to be divided into leading portion, stage casing, back segment near delivery area (A) side；Described leading portion caliber is maximum, and stage casing (10) are tapered shape, and back segment caliber is minimum.
A kind of oxygen-rich coal dust backflow premix burner, it is characterised in that: the combustion zone (B) of described secondary air channel (3) starts to be divided into leading portion, stage casing, back segment near delivery area (A) side；Fire monitor equipment (6) is installed on described leading portion.
A kind of oxygen-rich coal dust backflow premix burner, it is characterised in that: described burning torch (7b) is other is provided with cylinder (7a), and the piston rod of cylinder (7a) drives burning torch (7b) put in secondary air channel (3) or stretch out.
A kind of oxygen-rich coal dust backflow premix burner, it is characterized in that: described secondary air channel (3) outer wall is also cased with circumference airduct (9), described circumference airduct (9) covers whole combustion zone (B) and part delivery area (A), circumference airduct (9) transporting cold wind or air wind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610390819.2A CN105841147A (en) | 2016-06-04 | 2016-06-04 | Oxygen-enriched coal powder backflow premix burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610390819.2A CN105841147A (en) | 2016-06-04 | 2016-06-04 | Oxygen-enriched coal powder backflow premix burner |
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| CN105841147A true CN105841147A (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610390819.2A Pending CN105841147A (en) | 2016-06-04 | 2016-06-04 | Oxygen-enriched coal powder backflow premix burner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191927A (en) * | 2017-07-07 | 2017-09-22 | 浙江宜清环境技术有限公司 | A kind of micro- oil type pure oxygen steady burning burner burner |
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| CN206018610U (en) * | 2016-06-04 | 2017-03-15 | 重庆富燃科技股份有限公司 | A kind of oxygen-rich coal dust backflow premix burner |
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| CN1201878A (en) * | 1998-05-30 | 1998-12-16 | 马光耀 | Outer chamber type dual reflux coal-powder steady flame jet |
| CN201331055Y (en) * | 2008-12-08 | 2009-10-21 | 浙江大学 | External combustion type rich oxygen ignition and ultra low load stable combustion pulverized coal burner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107191927A (en) * | 2017-07-07 | 2017-09-22 | 浙江宜清环境技术有限公司 | A kind of micro- oil type pure oxygen steady burning burner burner |
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Address after: 400050 Chongqing Jiulongpo District West of Yangjiaping branch No. 20 building 9 street, two layers of fuel rich technology companies Applicant after: Chongqing Polytron Technologies Inc Address before: 400050 Chongqing Jiulongpo District West of Yangjiaping branch No. 20 building 9 street, two layers of fuel rich technology companies Applicant before: CHONGQING FURAN TECHNOLOGY CO., LTD. |
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Application publication date: 20160810 |