CN206739287U - A kind of external combustion chamber-type depth peak regulation combustion system - Google Patents
A kind of external combustion chamber-type depth peak regulation combustion system Download PDFInfo
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- CN206739287U CN206739287U CN201720425390.6U CN201720425390U CN206739287U CN 206739287 U CN206739287 U CN 206739287U CN 201720425390 U CN201720425390 U CN 201720425390U CN 206739287 U CN206739287 U CN 206739287U
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- combustion
- combustion chamber
- external combustion
- slag
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Abstract
External combustion chamber-type depth peak regulation combustion system, including the external combustion room outside boiler body, the cold slag tuyere in bottom, slag storehouse dividing wall, vortex burner, combustion chamber dividing wall, fire air nozzle, temperature adjustment wind snout on external combustion room, and the flue gas spout on boiler body；The external combustion room is made up of flame-proof thermal insulation material；Vortex burner utilizes the high temperature strong radiation environment that external combustion room is formed, make that breeze airflow is quick, vigorous combustion, to suppress NOx generations, combustion zone control is oxygen debt environment, and completely burned is realized in the combustion air that combustion zone top is provided using fire air nozzle；Combustion chamber is left into the tempering air regulation flue-gas temperature for before boiler body, utilizing temperature adjustment wind snout to provide in flue gas.The external combustion room is designed as slag tap pattern, and cold slag wind is heated using the waste heat of liquid slag and participated in burning by the cold slag tuyere of bottom, is discharged after liquid slag is cooled by furnace bottom.
Description
Technical field
It the utility model is related to thermal power generating technology field, and in particular to a kind of external combustion chamber-type depth peak regulation burning system
System.
Background technology
To solve the problems, such as the digestion capability abandoned wind, light, water power, improve new energy of getting worse, accelerate energy technology wound
Newly, coal unit peak regulation potentiality are excavated, improve the operational flexibility of fired power generating unit, National Energy Board issues on July 4th, 2016
Fired power generating unit flexibility transformation notice, first determines 16 pilot power plant, second batch (August notified on the 5th in 2016) and really
6 pilot power plant are determined, have been distinctly claimed：1) the expected tune that thermoelectricity unit will be made to increase by 20% rated capacity of flexibility transformation is lifted
Peak energy power, minimum technology, which is contributed, reaches 40%-50% rated capacities；2) tune of pure condensate unit increase 15%-20% rated capacities
Peak energy power, minimum technology, which is contributed, reaches 30%-35% rated capacities；3) by strengthening domestic and international exchange of technology and cooperation, part
The power plant for possessing transformation condition is expected to reach advanced world standards, and pure condensate operating mode minimum technology is contributed and reached when unit does not throw oily steady combustion
To 20%-25%；4) China implements the flexibility transformation of 2.2 hundred million kilowatts of coal units during planning " 13 ", has unit
Standby depth peak modulation capacity, and further increase load -response-speed, part of generating units possesses rapid starting/stopping peak modulation capacity.
For conventional coal unit in the depth peaking operation stage, first have to solve is exactly boiler low load stable combustion problem.Pot
During stove underrun, furnace flame temperature declines, and coal powder ignition is difficult, and flame holding is poor, easily extinguishes, once deal with improperly
Stove chamber fire-extinguishing or explosion accident will be caused.Adjusted by boiler combustion optimization adjustment and certain method of operation, such as：Suitably
Reduce primary air velocity, the wind powder distributing uniformity improve coal powder density, improve fineness of pulverized coal, improving each burner, using concentration
The technical measures such as the nozzles method of operation can improve the combustion stability of underload to a certain degree, but can not realize and significantly reduce boiler
Minimum steady fires the purpose of load.
From the angle analysis of coal dust firing, boiler in low- load conditions, because the flame temperature in burner hearth is relatively low, coal dust
Reduced into the heat absorption rate after burner hearth, reach the time increase for institute's calorific requirement of catching fire, flame easily extinguishes, low-load combustion-stabilizing energy
Power reduces.
The content of the invention
In order to overcome the problem of coal powder ignition is unstable under above-mentioned underload, the purpose of this utility model is to provide one kind
External combustion chamber-type depth peak regulation combustion system, using external combustion room create high temperature, intense radiation, oxygen debt burning situation and
The strong mixing and conflagration of cyclone firing, breeze airflow is set quickly, stably to burn；Utilize the compartment formed in combustion chamber
Structure so that the thermic load of single burner reduces, and preferably adapts to the needs of depth peak regulation.
In order to realize above-mentioned purpose of utility model, the utility model adopts the technical scheme that：
A kind of external combustion chamber-type depth peak regulation combustion system, including the external combustion room outside boiler body 9
5, more sub- combustion chambers are divided into by combustion chamber dividing wall 4 and slag storehouse dividing wall 2 inside the external combustion room 5, fired per height
Burn room top and vortex burner 3 is set, bottom sets the cold slag tuyere 1 in bottom, and the top of external combustion room 5 is additionally provided with burnout degree
Spout 6 and temperature adjustment wind snout 7；Also include the flue gas spout 8 being arranged on boiler body 9, the entrance connection of flue gas spout 8 is external
The exhanst gas outlet of formula combustion chamber 5；Breeze airflow is sent into external combustion room by the vortex burner 3 using cyclone firing principle
5 burnings, liquid slag caused by burning provide coal dust after-flame institute by the cold slag air cooling in the cold slag tuyere 1 in bottom, fire air nozzle 6
The burnout degree needed, for flue gas before flue gas spout 8 is entered, the temperature adjustment wind provided by temperature adjustment wind snout 7 carries out temperature adjustment.
The external combustion room 5 is made up of flame-proof thermal insulation material, and inside is by combustion chamber dividing wall 4 and slag storehouse dividing wall 2
More sub- combustion chambers are divided into, are easy to the steady combustion of single vortex burner 3.
High temperature, intense radiation, oxygen debt, strong combustion flame are formed in external combustion chamber 5 using vortex burner 3, and is filled
Divide and external combustion room 5 is divided into more sub- combustion chambers using slag storehouse dividing wall 2 and combustion chamber dividing wall 4, so as to strengthen list
The steady combustion ability of individual vortex burner 3.The liquid slag formed burn to the flows of external combustion chamber 5, and in the cold slag in bottom
The lower gradually cooling of cold slag wind effect that air port 1 provides.Burnout degree needed for burning is carried by the anterior fire air nozzle 6 of burner
For.For flue gas before flue gas spout 8 is entered, the temperature adjustment wind provided by temperature adjustment air port 7 adjusts its temperature.
Compared to the prior art the utility model, has the following advantages that：
A high temperature, intense radiation, oxygen debt burning situation are created using external combustion room, and utilizes the strong of cyclone firing
Burn rate greatly improves the combustion stability under running on the lower load.Flue gas into boiler body has that temperature is uniform, burner hearth
The advantages that degree of filling is good, solves the deficiency in terms of the hydrodynamic force of low-load combustion-stabilizing.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Wherein, 1 is the cold slag tuyere in bottom, and 2 be slag storehouse dividing wall, and 3 be vortex burner, and 4 be combustion chamber dividing wall, and 5 are
External combustion room, 6 be fire air nozzle, and 7 be temperature adjustment wind snout, and 8 be flue gas spout, and 9 be boiler body.
Embodiment
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
As shown in figure 1, depth peak regulation preheats low-load combustion-stabilizing combustion system with heat smoke, including installed in boiler body 9
Outer external combustion room 5, the cold slag tuyere 1 in bottom, slag storehouse dividing wall 2, vortex burner on external combustion room 5
3rd, combustion chamber dividing wall 4, fire air nozzle 6, temperature adjustment wind snout 7, and the flue gas spout 8 on boiler body 9.It is described
Breeze airflow is sent into external combustion room 5 using cyclone firing principle and burnt by vortex burner 3, liquid slag caused by burning by
Cold slag air cooling in the cold slag tuyere 1 in bottom, fire air nozzle 6 provide the burnout degree needed for coal dust after-flame, and flue gas is into cigarette
Before gas blowout mouth 8, the temperature adjustment wind provided by temperature adjustment wind snout 7 carries out temperature adjustment.The external combustion room 5 is by flame-proof thermal insulation material
Form, it is internal that more sub- combustion chambers are divided into by combustion chamber dividing wall 4 and slag storehouse dividing wall 2, it is easy to the steady of single vortex burner 3
Combustion.
As shown in figure 1, high temperature, intense radiation, oxygen debt, strong burning are formed in external combustion chamber 5 using vortex burner 3
Flame, and make full use of slag storehouse dividing wall 2 and combustion chamber dividing wall 4 that external combustion room 5 is divided into more sub- combustion chambers, from
And strengthen the steady combustion ability of single vortex burner 3.The liquid slag formed burn to the flows of external combustion chamber 5, and
The lower gradually cooling of cold slag wind effect that the cold slag tuyere 1 in bottom provides.Burnout degree needed for burning is by the anterior burnout degree of burner
Spout 6 provides.For flue gas before flue gas spout 8 is entered, the temperature adjustment wind provided by temperature adjustment air port 7 adjusts its temperature.
Vortex burner utilizes the high temperature strong radiation environment that external combustion room is formed, and breeze airflow quickly, is acutely fired
Burn, to suppress NOx generations, combustion zone control is oxygen debt environment, is helped on combustion zone top using what fire air nozzle provided
Combustion air realizes completely burned.Combustion chamber is left into before boiler body, utilizing the temperature adjustment that temperature adjustment wind snout provides empty in flue gas
Controlled atmosphere section flue-gas temperature.The external combustion room is designed as slag tap pattern, and the cold slag tuyere of bottom utilizes liquid slag
Cold slag wind is heated and participates in burning by waste heat, is discharged after liquid slag is cooled by furnace bottom.
Claims (2)
- A kind of 1. external combustion chamber-type depth peak regulation combustion system, it is characterised in that：Including installed in boiler body (9) outside outer Formula combustion chamber (5) is put, is divided into inside the external combustion room (5) by combustion chamber dividing wall (4) and slag storehouse dividing wall (2) multiple Sub- combustion chamber, every sub- combustion chamber top set vortex burner (3), and bottom sets the cold slag tuyere in bottom (1), external combustion Room (5) top is additionally provided with fire air nozzle (6) and temperature adjustment wind snout (7)；Also include the flue gas being arranged on boiler body (9) Spout (8), the exhanst gas outlet of entrance connection external combustion room (5) of flue gas spout (8).
- 2. external combustion chamber-type depth peak regulation combustion system according to claim 1, it is characterised in that：The external combustion Room (5) are burnt to be made up of flame-proof thermal insulation material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720425390.6U CN206739287U (en) | 2017-04-21 | 2017-04-21 | A kind of external combustion chamber-type depth peak regulation combustion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720425390.6U CN206739287U (en) | 2017-04-21 | 2017-04-21 | A kind of external combustion chamber-type depth peak regulation combustion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206739287U true CN206739287U (en) | 2017-12-12 |
Family
ID=60561759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720425390.6U Expired - Fee Related CN206739287U (en) | 2017-04-21 | 2017-04-21 | A kind of external combustion chamber-type depth peak regulation combustion system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206739287U (en) |
-
2017
- 2017-04-21 CN CN201720425390.6U patent/CN206739287U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171212 Termination date: 20190421 |