CN104848243B - A kind of half transporting pulverized coal with exhaust gas method and boiler using intermediate storage-type pulverized coal preparation system - Google Patents
A kind of half transporting pulverized coal with exhaust gas method and boiler using intermediate storage-type pulverized coal preparation system Download PDFInfo
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- CN104848243B CN104848243B CN201510222262.7A CN201510222262A CN104848243B CN 104848243 B CN104848243 B CN 104848243B CN 201510222262 A CN201510222262 A CN 201510222262A CN 104848243 B CN104848243 B CN 104848243B
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Abstract
The invention discloses a kind of half transporting pulverized coal with exhaust gas method using intermediate storage-type pulverized coal preparation system, powder feeding process includes：First air from air preheater carries the coal dust that pulverizer coal feeder provides and enters hearth combustion, and tertiary air of the row powder fan output with coal dust enters burner hearth, shunts the tertiary airs of 30~80% volume flows to First air；The invention also discloses the half transporting pulverized coal with exhaust gas boilers using intermediate storage-type pulverized coal preparation system for realizing the method for the present invention；The half transporting pulverized coal with exhaust gas method and boiler using intermediate storage-type pulverized coal preparation system of the present invention, part tertiary air is sent into First air, reduce the air quantity that tertiary air enters burner hearth by tertiary-air pipe, improve First air wind speed, the temperature in First air air hose is reduced, in the case where other air distribution conditions are constant, CO contents are substantially reduced in burner hearth, SNCR denitration efficiency improves, and makes the initial NO of burner hearthxConcentration reduces, and manufactures at low cost, it is easy to accomplish.
Description
Technical field
The present invention relates to boiler combustion technology, more particularly to a kind of half transporting pulverized coal with exhaust gas using intermediate storage-type pulverized coal preparation system
Method and boiler.
Background technology
Domestic overwhelming majority power plant is coal-burning power plant, and coal combustion is the main source of nitrogen oxides, and air is polluted.
In January, 2010, State Ministry of Environmental Protection works out《Thermal power plant's nitrogen oxides technological policy for treatment》(ring sends out [2010] No. 10 2010-01-
27 implement), wherein clear stipulaties NOxThe selection principle of control technology：Using low-NO_x combustion technology as coal-burning power plant's nitrogen oxidation
The one preferred technique of object control, after using low-NO_x combustion technology, discharged nitrous oxides concentration is not still up to standard or is unsatisfactory for total amount
It is required that when, denitrating flue gas facility should be built.
The one preferred technique that low-NO_x combustion technology is controlled as coal-burning power plant's nitrogen oxides, is applied in now with operating unit
Widely, wherein carrying out often handling tertiary air when low nitrogen is transformed to intermediate storage-type pulverized coal carried by hot air system.
Authorization Notice No. is that the patent document of CN202253605 discloses a kind of reduction coal-burning boiler tertiary air burning generation
Nitrogen oxides device, which takes and installs light-dark separation device on the air passage before wind snout three times, air-coal separating it
Installing the mode of partition plate in air passage afterwards additional makes tertiary air locally generate oxygen debt burning, so as to reduce nitrogen oxides.The invention is not required to
Boiler milling system and tertiary air air passage are transformed, has the characteristics that equipment simple operation and maintenance cost are low.But due in
Between bin system tertiary air by pulverized-coal collector separate carry about 10% coal dust " lack of gas " form, coal dust
Content is not natively high, so the effect that air-coal separating is carried out to tertiary air is restricted.In addition, on primary zone top to three times
Wind carries out air-coal separating, and manufacture oxygen-depleted zone will also result in local coal dust imperfect combustion, CO contents is caused to raise.
Harbin Institute of Technology proposes a kind of lack of gas and hot wind in the patent document of Application No. 201010106866.2
Dual-medium powder feeding system, NO caused by which mainly solves tertiary airxThe problem of discharge capacity height and slagging, which increases weary
The equipment such as gas bellows and air and powder mixer, pipe-line system are complicated.
It is proposed that a kind of pulverized-coal fired boiler stores in a warehouse pulverized coal making system qi leel from dress in the patent document of Publication No. CN 1624380A
It puts.The invention thinks that Exhaust fan exports coal dust is divided into deep or light two parts by the effect of row powder fan centrifugal force, dense powder with once
Air hose is connected, and dilute powder is connected with secondary air channel, so will no longer be present tertiary air.Dilute powder is introduced Secondary Air by the device, it will
Abrasion is generated to Secondary Air air hose, it is necessary to be replaced to secondary air channel.In addition, tertiary air often also acts as adjustment in low nitrogen burning
Furnace flame height, controls the effect of gas temperature windage, may not be favourable to burning so fully phasing out tertiary air.
Due to combustion fluctuation, tertiary air is arranged in burner hearth by top, and the variation of tertiary air quantity and combustion position causes in stove
NOxIt is often fluctuated very greatly with CO contents, and the content of CO is the important factor in order of SNCR denitration efficiency in stove.Lv Hong is female et al.
When being used as reducing agent by experiment and analog study urea and ammonia respectively, influence of the CO contents to SNCR denitration performance.Research
Show with the increase of CO additive amounts, whether NH3As reducing agent or urea as reducing agent, reaction temperature window all to
Low temperature direction is moved, temperature window narrowed width, and optimal denitration efficiency reduces.CO couples by tube furnace experimental study of Cao Qingxi
NH3The influence of SNCR denitration effect as reducing agent, research find that the CO of addition 300ppm can be down to optimal reaction temperature
875 DEG C, the range of decrease is 50 DEG C, and the CO for adding in 900ppm can be down to 825 DEG C, and the range of decrease is 100 DEG C.Adding in CO makes reaction temperature window
Mouth substantially narrows, and with the increase of CO concentration, window persistently narrows, the influence of denitration efficiency when addition CO is to being higher than 925 DEG C
It is more apparent.
The content of the invention
The present invention provides a kind of half transporting pulverized coal with exhaust gas methods using intermediate storage-type pulverized coal preparation system, can reduce NOxRow
It puts, and the problem of CO too high levels inhibit SNCR denitration efficiency in burner hearth can be eliminated.
A kind of half transporting pulverized coal with exhaust gas method using intermediate storage-type pulverized coal preparation system, powder feeding process include：From air preheater
First air carries the coal dust that pulverizer coal feeder provides and enters hearth combustion, and tertiary air of the row powder fan output with coal dust passes through tertiary air
Pipe is sent into burner hearth, shunts the tertiary air of 30~80% volume flows to First air.
Due to the tertiary air of intermediate storage-type pulverized coal preparation system be by pulverized-coal collector separate carry about 10% coal dust
" lack of gas " form, in the prior art will " lack of gas " as tertiary air be sent into burner hearth primary zone top burning, three times wind snout away from
Position from primary zone is to NOxThere is material impact with CO yields, since tertiary air air quantity is big in the prior art, cause to arrange
During burnout degree, NO is reduced using air classificationxLow nitrogen burning system when, low nitrogen burning effect is poor.And part engineering uses three
The low nitrogen modification scheme that secondary wind moves up, tertiary air band powder burn in burnout degree (SOFA) n ear, cause SNCR reaction zones not
So a large amount of CO of most fine breeze generation, and CO excessive concentrations, can cause SNCR denitration efficiency to be greatly reduced；Substantial amounts of temperature simultaneously
Relatively low tertiary air is put on primary zone top, when a particularly stove two grinds (when two flour mills supply a boiler) operation, is folded
The low temperature tertiary air jet stream being added together can dilute lower section First air in coal dust firing generate high-temperature flue gas, slow down in coal dust
Coke velocity, but also flame kernel moves up, fly ash combustible material increases, NOxDischarge rise, and reduce SNCR efficiency.
And using the method for the present invention, part tertiary air is sent into First air, tertiary air is reduced and is entered by tertiary-air pipe
The air quantity of burner hearth improves First air wind speed, reduces the temperature in First air air hose, in the case where other air distribution conditions are constant,
CO contents are substantially reduced in burner hearth, and SNCR denitration efficiency improves, and makes the initial NO of burner hearthxConcentration reduces.
Preferably, the tertiary air wind pressure distributed is more than the First air wind pressure from air preheater.Ensure be diverted three
Secondary wind is smoothly sent into primary air piping, while prevents high temperature First air from pouring in down a chimney into the tertiary air communicating pipe containing fine breeze, ensures
Safety.
It is further preferred that the tertiary air wind pressure distributed is 3.0~6.0KPa, temperature is 60~70 DEG C.Wind pressure three times
Wind pressure three times can be effectively ensured not less than 3.0KPa and be higher than primary air pressure, be to ensure that row powder fan goes out less than 6.0KPa
One's intention as revealed in what one says pressure ensures equipment safety in controlled range.Air temperature is too low three times is unfavorable for coal dust drying, contains duff in tertiary air
Powder, temperature is excessively high, and there are security risks.
Preferably, the First air wind pressure from air preheater is 2.36~2.6KPa, and temperature is 160~185 DEG C.With above-mentioned
In the range of wind pressure and the First air of wind-warm syndrome, after being mixed with the tertiary air distributed, high combustion efficiency, flameholding safety.
The invention also discloses the half transporting pulverized coal with exhaust gas boilers for using intermediate storage-type pulverized coal preparation system, utilize tertiary air communicating pipe
Tertiary air is shunted into primary air piping, it is simple in structure, do not increase and decrease the component of existing equipment, improvement cost is relatively low.
First regulating butterfly valve on supervisor is installed, the second regulating butterfly valve is installed on each branch pipe.So as to which each branch pipe can
With each self-regulation intake.
A kind of half transporting pulverized coal with exhaust gas boiler using intermediate storage-type pulverized coal preparation system, it is described including furnace body and powder feeding unit
Powder feeding unit includes：Coal pulverizer, pulverized-coal collector, row powder fan, pulverized coal bin, the tertiary-air pipe for connecting row powder fan and furnace body,
The circulated air of row powder fan sent back to the recirculation pipe of coal pulverizer, the pulverizer coal feeder of coal dust and pulverizer coal feeder is carried in pulverized coal conveying storehouse and carries
The coal dust of confession enters the primary air piping of furnace body, outlet header or recirculation pipe interface the connection shunting tertiary air of the row powder fan
Tertiary air communicating pipe, access in the primary air piping tertiary air communicating pipe.
In order to facilitate the tertiary air wind pressure for adjusting shunting, it is preferred that be equipped with the first adjusting on the tertiary air communicating pipe
Butterfly valve.
In order to control the tertiary air of shunting into the air quantity in each primary air piping, it is preferred that described in the powder feeding unit
Pulverizer coal feeder is equipped at least two, and every pulverizer coal feeder corresponds to a piece primary air piping of access, include the tertiary air communicating pipe supervisor with
And the more branch pipes with the access supervisor in parallel, every branch pipe correspond to a piece primary air piping of access.Once it is in charge of correspondence for every to connect
Enter branch pipe, be conducive to control mixed First air wind pressure.
The air quantity of each primary air piping is branched to for the ease of control, it is further preferred that installing described first on supervisor
Regulating butterfly valve is equipped with the second regulating butterfly valve on each branch pipe.The intake so that each branch pipe can respectively be self-regulated.
For the ease of the partial pressure and temperature of the tertiary air of control shunting, it is preferred that be equipped with temperature on each tertiary air communicating pipe
Degree and pressure sensor.
Coal dust enters the branch pipe of tertiary air communicating pipe in order to prevent, it is preferred that each branch pipe corresponding primary air piping of access falls
Tube cell upstream.Powder sinking tube upstream refers to tertiary air access primary air piping after mixing by powder sinking tube, the so row's of can guarantee powder wind
Coal dust when machine is stopped transport in powder sinking tube will not enter in the branch pipe of tertiary air communicating pipe, ensure that combustion completion is stablized.
In order to improve work efficiency, it is preferred that the powder feeding unit is equipped with two sets, and in order in singly mill operation, divide
The tertiary air of stream can reach all branch pipes, be interconnected the tertiary air communicating pipe of two sets of powder feeding units, connectivity part is equipped with
Isolating valve,.When singly mill operation, open isolating valve, make operation coal pulverizer tertiary air by the supervisor of tertiary air communicating pipe into
In the branch pipe for entering another coal pulverizer.
Beneficial effects of the present invention：
The half transporting pulverized coal with exhaust gas method and boiler using intermediate storage-type pulverized coal preparation system of the present invention, part tertiary air is sent into
In First air, the air quantity that tertiary air enters burner hearth by tertiary-air pipe is reduced, First air wind speed is improved, reduces in First air air hose
Temperature, in the case where other air distribution conditions are constant, CO contents are substantially reduced in burner hearth, SNCR denitration efficiency improve, make stove
The initial NO of thoraxxConcentration reduces, and manufactures at low cost, it is easy to accomplish.
Description of the drawings
Fig. 1 is the half transporting pulverized coal with exhaust gas boiler part structure diagram of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings, the specific embodiment of the invention is described in detail.
The boiler of the present embodiment be with Shanghai Boiler Plant manufacture SG-420/13.7-M417A types super-pressure, single drum,
It is transformed based on natural circulation boiler, boiler uses intermediate warehouse, pulverized coal carried by hot air system, drum center line absolute altitude 42.75
Rice, burner have three layers of First air.The boiler takes low nitrogen burning transformation, and air-coal separating, light side cloth are carried out to tertiary air
It puts in SOFA burners lower floor, dense side is arranged in last wind top.Use urea to boiler as also after low nitrogen transformation
The SNCR denitrating flue gas transformation of former agent, arranges three layers of SNCR spray guns, every layer of 7 spray gun.
As shown in Figure 1, the present embodiment is included using half transporting pulverized coal with exhaust gas boiler of intermediate storage-type pulverized coal preparation system：Furnace body
The powder feeding unit 1 in (being not drawn into figure) and left side and the powder feeding unit 2 on right side, powder feeding unit 1 include：Coal pulverizer 101, fine powder
Separator 102, row powder fan 103, pulverized coal bin (are not drawn into) in figure, connect the tertiary-air pipe 105 of row powder fan 103 and furnace body,
The circulated air of row powder fan 103 sent to the recirculation pipe 106 of coal pulverizer 101 back to, six pulverizer coal feeders of coal dust in pulverized coal conveying storehouse
107, the six roots of sensation primary air piping 108 that the coal dust that pulverizer coal feeder 107 provides enters furnace body is carried, primary air piping 108 connects air preheater
109, the tertiary air of outlet header or 106 interface of recirculation pipe the connection shunting tertiary air of the row powder fan 103 of powder feeding unit 1 connects
Siphunculus 110, tertiary air communicating pipe 110 are accessed in the primary air piping 108 of place powder feeding unit, and tertiary air communicating pipe 110 includes master
Pipe 111 and the six roots of sensation branch pipe 112 with the access supervisor in parallel, the upstream of each corresponding primary air piping 108 of the access of branch pipe 112 are main
Hand-operated butterfly valve 113, electric butterfly valve 114, temperature sensor 115 and pressure sensor 116 are installed, branch pipe 112 is installed on pipe 111
There is Hand-operated butterfly valve 117, air preheater 109 supplies simultaneously to secondary air channel 120.
The structure of powder feeding unit 2 is identical with powder feeding unit 1, including：Coal pulverizer 201, pulverized-coal collector 202, row powder fan
203, pulverized coal bin (is not drawn into) in figure, tertiary-air pipe 205, recirculation pipe 206, pulverizer coal feeder 207, primary air piping 208, air preheater
209, tertiary air communicating pipe 210, supervisor 211, branch pipe 212, Hand-operated butterfly valve 213, electric butterfly valve 214, temperature sensor 215, pressure
Force snesor 216, Hand-operated butterfly valve 217 and secondary air channel 220.
In order to which in singly mill operation, the tertiary air of shunting can reach all branch pipes, the tertiary air of two sets of powder feeding units
The supervisor 111 and supervisor 211 of communicating pipe is interconnected, and junction is equipped with isolating valve,.
First, the present embodiment tertiary air part access First air in the case where singly grinding service condition (is run with the coal pulverizer 101 in left side
Exemplified by) operating procedure：
1st, the Hand-operated butterfly valve 113 on each tertiary air communicating pipe is kept first, electric butterfly valve 114, Hand-operated butterfly valve 117, manually
Butterfly valve 213, electric butterfly valve 214, Hand-operated butterfly valve 217 and isolating valve, are closed；
2nd, coal pulverizer 101 and row powder fan 103 are started；
3rd, Hand-operated butterfly valve 113 and isolating valve, are opened；
4th, upper strata tertiary air electric flap 118 slowly is turned down, electricity is slowly opened after the rise of 103 outlet pressure of row powder fan
Dynamic butterfly valve 114 is controlled in wind communicating pipe two or three times by temperature sensor (114,214) and pressure sensor (115,215) and divided
The tertiary air pressure and temperature of outflow；
5th, the Hand-operated butterfly valve (117,217) of each branch pipe (112,212) is slowly opened successively；
6th, upper strata tertiary air electric flap 118 and lower floor's tertiary air electric flap 119 are progressively turned down, is turned down into tertiary air
The air quantity of pipe 105, accordingly sees fire, makes flame combustion normal, without apparent fluctuation, and progressively adjusts the First air wind from air preheater
Pressure, and burning monitoring is carried out, make stabilization of catching fire, each combustion parameter is normally without apparent fluctuation.
2nd, tertiary air part under double mill service conditions is switched to during single mill operation and accesses First air (with the coal pulverizer in left side
101 run, exemplified by the coal pulverizer 201 for enabling right side) operating procedure：
1st, under 101 operating status of coal pulverizer, coal pulverizer 201 and row powder fan 203 are first started；
2nd, the Hand-operated butterfly valve 213 on tertiary air communicating pipe is opened, and passes through upper strata tertiary air electric flap 218 and lower floor three
Secondary wind electric flap 219 turns the air quantity into tertiary-air pipe 205 down；
3rd, the electric butterfly valve 214 on tertiary air communicating pipe is slowly opened, as valve opening increases, gradually turns down upper strata three
Secondary wind electric flap 218 and lower floor's tertiary air electric flap 219, accordingly see fire, progressively adjust the First air wind from air preheater
Pressure, and wind speed monitoring in burning monitoring and primary air piping is carried out, primary air piping wind pressure and wind speed is made to keep relative stability, is not occurred
Apparent fluctuation.
Access First air operating procedure in tertiary air part (when being run with double mills, is stopped when the 3rd, switching to single mill during double mill operations
Exemplified by coal pulverizer 101 and row powder fan 103)
Operating procedure：
1st, under double mill operating statuses, coal pulverizer 101 is disabled；
2nd, the electric butterfly valve 114 on tertiary air communicating pipe 110 is closed；
3rd, row powder fan 103 is closed.
The boiler of the present embodiment can effectively shunt tertiary air, and the easily controllable tertiary air wind pressure distributed and temperature
Degree realizes the purpose of the method for the present embodiment.
The boiler of the present embodiment modification scheme is not used, since low nitrogen transforms the reforming mode for employing tertiary air and moving up,
Tertiary air is made to have raised nearly 6m, tertiary air band powder is caused to burn in burnout degree (SOFA) n ear, is caused close in 30m or so
SNCR reaction zones still have flame combustion, and the fine breeze for causing SNCR reaction zone possible troubles most generates a large amount of CO, and actual measurement CO concentration reaches
1580ppm, CO too high levels, cause SNCR reaction temperatures window to be moved to low temperature direction, and temperature window narrows so that has transformed
There was only 15%~27% into rear SNCR denitration efficiency, the design requirement less than 40%.
In actually transforming, by the dilute phase on upper strata, air lock is dead three times, is equivalent to and closes upper strata tertiary air electric flap completely
It closes, draws DN500 helix tubes as tertiary air communicating pipe from Exhaust fan exports header or recirculation pipe interface offside, transformation needs
Explosion proof door in header is shifted；Will the tertiary air communicating pipe of extraction through 9 meters of layer boiler operatiopn platforms, and 9 meters of platforms it
On two row powder fan headers are drawn connect tertiary air communicating pipe, both sides install Hand-operated butterfly valve and electric butterfly valve additional, are respectively
For the sake of safety, type metal expansion joint and hanger are installed on the tertiary air communicating pipe additional；From the coconnected tertiary air positioned at 9 meters of platforms
12 DN150 branch pipes are picked out in communicating pipe, are respectively connected to the powder sinking tube upstream of 12 primary air pipings, install additional on every branch pipe
Hand-operated butterfly valve.
Detailed measurements record is carried out to boiler combustion parameter, parameter before and after transformation is compared, is therefrom found：After transformation
Exhaust fan exports are closed to upper strata tertiary air throttle opening from 100% to 0%, Exhaust fan exports to lower floor's tertiary air air door
Aperture is closed from 100% to 30%, and row powder fan electric current is basically unchanged, so by 70% volume flow being diverted three times
Wind is sent into First air, and the tertiary air wind pressure distributed is 4.0~5.0KPa, and temperature is 65~70 DEG C, First air wind speed before mixing
For 26~32m/s, wind pressure is 2.4~2.5KPa, and wind-warm syndrome is 165~180 DEG C, and First air wind speed is made to increase 2~4m/s after mixing,
Temperature reduces by 10~30 DEG C；Under the conditions of equal air distribution, other parameters are basically unchanged, and burner hearth CO contents are dropped to from 1580ppm
213ppm, SNCR denitration efficiency are promoted to 43.4% from 27%, the initial NO of burner hearthxConcentration drops to 280mg/ from 350mg/Nm3
Nm3 reaches the design requirement of low nitrogen transformation.
Claims (3)
1. a kind of half transporting pulverized coal with exhaust gas method using intermediate storage-type pulverized coal preparation system, powder feeding process includes：One from air preheater
Secondary wind carries the coal dust that pulverizer coal feeder provides and enters hearth combustion, and tertiary air of the row powder fan output with coal dust passes through tertiary-air pipe
It is sent into burner hearth, which is characterized in that the tertiary air of 30~80% volume flows of shunting to First air；
In the intermediate storage-type pulverized coal preparation system, powder feeding unit is equipped with two sets, often covers in powder feeding unit, and pulverizer coal feeder is equipped at least two
Platform, every pulverizer coal feeder correspond to a piece primary air piping of access, include supervisor the tertiary air communicating pipe and access the master in parallel
More branch pipes of pipe, every branch pipe correspond to a piece primary air piping of access, supervisor's phase of the tertiary air communicating pipe of two sets of powder feeding units
Intercommunicated, connectivity part is equipped with isolating valve,；The tertiary air wind pressure distributed is more than the First air wind pressure from air preheater；It distributes
Tertiary air wind pressure for 3.0~6.0KPa, temperature is 60~70 DEG C；First air wind pressure from air preheater for 2.36~
2.6KPa, temperature are 160~185 DEG C.
2. a kind of half transporting pulverized coal with exhaust gas boiler using intermediate storage-type pulverized coal preparation system, described to send including furnace body and powder feeding unit
Powder unit includes：Coal pulverizer, pulverized-coal collector, row powder fan, pulverized coal bin, the tertiary-air pipe for connecting row powder fan and furnace body, will
The circulated air of row powder fan sends the recirculation pipe of coal pulverizer back to, the pulverizer coal feeder of coal dust and carries pulverizer coal feeder in pulverized coal conveying storehouse and provides
Coal dust enter the primary air piping of furnace body, which is characterized in that outlet header or recirculation pipe the interface connection of the row powder fan
The tertiary air communicating pipe of tertiary air is shunted, is accessed in the primary air piping tertiary air communicating pipe；
In the intermediate storage-type pulverized coal preparation system, powder feeding unit is equipped with two sets, often covers in powder feeding unit, and pulverizer coal feeder is equipped at least two
Platform, every pulverizer coal feeder correspond to a piece primary air piping of access, include supervisor the tertiary air communicating pipe and access the master in parallel
More branch pipes of pipe, every branch pipe correspond to a piece primary air piping of access, supervisor's phase of the tertiary air communicating pipe of two sets of powder feeding units
Intercommunicated, connectivity part is equipped with isolating valve,；First regulating butterfly valve on supervisor is installed, the second regulating butterfly valve is installed on each branch pipe.
3. half transporting pulverized coal with exhaust gas boiler of intermediate storage-type pulverized coal preparation system is used as claimed in claim 2, which is characterized in that each
The powder sinking tube upstream of the corresponding primary air piping of pipe access.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1624380A (en) * | 2004-12-10 | 2005-06-08 | 清华大学 | Separation device of storehouse type powdered coal boiler powder making system powder sending air laeking |
| CN101596980A (en) * | 2009-06-24 | 2009-12-09 | 哈尔滨工业大学 | Hot blast and exhaust gas double-medium powder delivery method and weary gas and hot air mixer |
| CN101725994A (en) * | 2010-02-05 | 2010-06-09 | 哈尔滨工业大学 | Exhaust gas and hot-blast air dual-medium powder feeding system |
| CN202253605U (en) * | 2011-07-22 | 2012-05-30 | 浙江百能科技有限公司 | Device for reducing nitrogen oxides generated by tertiaryair combustion in coal-fired boiler |
| JP2013108640A (en) * | 2011-11-17 | 2013-06-06 | Babcock Hitachi Kk | Solid fuel boiler system and solid fuel burner |
| CN204786517U (en) * | 2015-05-04 | 2015-11-18 | 浙江大学 | Half weary pneumatic transmission powder boiler of storage formula powder process system in middle of using |
-
2015
- 2015-05-04 CN CN201510222262.7A patent/CN104848243B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1624380A (en) * | 2004-12-10 | 2005-06-08 | 清华大学 | Separation device of storehouse type powdered coal boiler powder making system powder sending air laeking |
| CN101596980A (en) * | 2009-06-24 | 2009-12-09 | 哈尔滨工业大学 | Hot blast and exhaust gas double-medium powder delivery method and weary gas and hot air mixer |
| CN101725994A (en) * | 2010-02-05 | 2010-06-09 | 哈尔滨工业大学 | Exhaust gas and hot-blast air dual-medium powder feeding system |
| CN202253605U (en) * | 2011-07-22 | 2012-05-30 | 浙江百能科技有限公司 | Device for reducing nitrogen oxides generated by tertiaryair combustion in coal-fired boiler |
| JP2013108640A (en) * | 2011-11-17 | 2013-06-06 | Babcock Hitachi Kk | Solid fuel boiler system and solid fuel burner |
| CN204786517U (en) * | 2015-05-04 | 2015-11-18 | 浙江大学 | Half weary pneumatic transmission powder boiler of storage formula powder process system in middle of using |
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