CN208983394U - Boiler system - Google Patents
Boiler system Download PDFInfo
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- CN208983394U CN208983394U CN201820990793.XU CN201820990793U CN208983394U CN 208983394 U CN208983394 U CN 208983394U CN 201820990793 U CN201820990793 U CN 201820990793U CN 208983394 U CN208983394 U CN 208983394U
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Abstract
The utility model relates to boiler systems.Boiler system includes boiler and powder unit processed, boiler has at least one burner, powder unit processed includes an at least coal pulverizer, each separator outlet of every coal pulverizer is connected with the powder feeding pipeline that at least one leads to burner, each separator outlet of coal pulverizer is also connected with auxiliary tube cell, auxiliary tube cell is connected with powder-storage bin, the pipeline of tube cell is assisted to be equipped with the control valve of control auxiliary tube cell pipeline on-off, powder-storage bin is equipped with the control device of control powder-storage bin and powder feeding pipeline on-off with each powder feeding pipeline connection and on the pipeline for being connected to powder-storage bin and each powder feeding pipeline.Coal pulverizer stores a certain amount of coal dust when operating normally in powder-storage bin；When tripping or disconnected coal occur for coal pulverizer, control device control powder-storage bin and powder feeding pipeline connection make powder-storage bin start powder supply, while the control valve of powder feeding pipe road is kept open, and powder feeding pipeline serves as air duct and blows coal dust to burner, burner fuel supply is maintained, to avoid boiler extinguishment.
Description
Technical field
The utility model relates to boiler systems.
Background technique
Thermal power generation is the main force of modern society's electric power development, fuel used predominantly coal.Large thermal power plant is to improve
The usual combusting coal fines of efficiency of fire coal, therefore, the coal in coal scuttle will first be sent to powder is milled into coal pulverizer, then be sent to boiler again
Furnace chamber inner combustion.As shown in Figure 1, boiler system includes boiler 7 and powder unit processed, powder unit processed includes an at least coal pulverizer 2,
Boiler 7 has multiple burners 14, and every coal pulverizer provides coal dust to multiple burners.The coal pulverizer that thermal power plant uses at present is big
The formula that mostly goes with each other all the time coal pulverizer or vertical spindle coal pulveriser.Vertical spindle coal pulveriser has a separator, as shown in Fig. 2, separator 6
Outlet is connected with more powder feeding pipelines 4, and every powder feeding pipeline leads to different burners, and every powder feeding pipeline 4 is equipped with control
Valve 5.There are two separators for the formula that goes with each other all the time coal pulverizer tool, send as shown in figure 3, the outlet of each separator 6 is respectively connected with more
Tube cell road 4, every powder feeding pipeline of same separator outlet lead to different burners, and every powder feeding pipeline 4 is equipped with control
Valve 5.Every coal pulverizer provides coal dust to multiple burners by more powder feeding pipelines, once tripping or disconnected occurs for this TV station coal pulverizer
Coal, burner corresponding with this TV station coal pulverizer are possible to the presence of undercharge, in some instances it may even be possible to burner hearth be caused to go out
Fire brings massive losses.
Utility model content
The purpose of this utility model is to provide a kind of boiler systems, to solve coal pulverizer in the feelings that tripping or disconnected coal occurs
The problem of causing burner fuel insufficient when condition and then leading to boiler extinguishment.
To achieve the above object, the boiler system of the utility model includes boiler and powder unit processed, and boiler has at least one
A burner, powder unit processed include an at least coal pulverizer, and it is logical that each separator outlet of every coal pulverizer is connected at least one
Toward the powder feeding pipeline of burner, each separator outlet of coal pulverizer is also connected with auxiliary tube cell, and auxiliary tube cell is connected with powder-storage bin,
The pipeline of tube cell is assisted to be equipped with control auxiliary tube cell connection when the coal dust amount in powder-storage bin is lower than specified reserves, in powder-storage bin
The control valve that control auxiliary tube cell disconnects when coal dust amount reaches specified reserves, powder-storage bin are stored up with each powder feeding pipeline connection and being connected to
The pipeline of powder cabin and each powder feeding pipeline is equipped with the control powder-storage bin in the normal powder feeding of powder feeding pipeline and disconnects, sending with powder feeding pipeline
Tube cell road cannot normal powder feeding when control powder-storage bin and powder feeding pipeline connection control device.When coal pulverizer operates normally, powder feeding
Each burner powder supply of pipeline bio-occlusion, while a certain amount of coal dust is stored in powder-storage bin；When tripping or disconnected coal occur for coal pulverizer
When, control device control powder-storage bin and powder feeding pipeline connection make powder-storage bin start powder supply, while the control valve of powder feeding pipe road is protected
Opening state is held, powder feeding pipeline serves as air duct and blows coal dust to burner, maintains the fuel of burner to supply, to avoid pot
Furnace fire extinguishing.
Further, the control device is the control device that can control pulverized coal flow.It can adjust according to actual needs
Pulverized coal flow maintains the normal coal dust supply of corresponding burner, meanwhile, improve coal utilization.
Preferably, control device uses pulverizer coal feeder.Pulverizer coal feeder is more convenient to the control of pulverized coal flow, reliable.
On the basis of any one of the above scheme, the pipeline and powder feeding piping connection of connection powder-storage bin and powder feeding pipeline
Position is equipped with air and powder mixer.When coal occurs tripping or breaking in coal pulverizer, air and powder mixer makes to be blown by powder feeding pipeline primary
The coal dust fallen in wind and powder-storage bin enter burner before mix it is more uniform, to make the burning of coal dust in the burner
More sufficiently, coal utilization is improved.
The newly-increased separator for separating wind and coal dust is connected between the auxiliary tube cell and powder-storage bin.Newly-increased separation
Device separates the coal dust and First air of auxiliary tube cell submitting, and a large amount of coal dusts are fallen into powder-storage bin, and a small amount of particulate coal dust is by one
Secondary wind carrying is sent to elsewhere.
Further, the dilute phase air pipe line being connected on the air outlet of separator towards boiler combustion exhausted stratification of wind, dilute phase are increased newly
Air pipe line is equipped with the valve of control dilute phase air pipe line on-off.A small amount of particulate coal dust that First air carries is sent by dilute phase air pipe line
Enter boiler combustion, improves coal utilization.
The top that the newly-increased separator is located at powder-storage bin makes it automatically fall into powder-storage bin using the gravity of coal dust
In.
Detailed description of the invention
Fig. 1 is the work flow diagram that more vertical spindle coal pulverisers are used in existing boiler system；
Fig. 2 is the work flow diagram of separate unit vertical spindle coal pulveriser；
Fig. 3 is the work flow diagram of formula coal pulverizer of going with each other all the time；
Fig. 4 is the schematic diagram that auxiliary tube cell is connected on coal pulverizer；
In figure: 1- raw coal bucket；2- coal pulverizer；3- dreg discharging box；4- powder feeding pipeline；5- control valve；6- separator；7- boiler；
8- assists tube cell；9- powder-storage bin；10- increases separator newly；11- air and powder mixer；12- pulverizer coal feeder；13- dilute phase air pipe line；14- combustion
Burner；15- valve.
Specific embodiment
The embodiments of the present invention is described further with reference to the accompanying drawing.
The specific embodiment of the boiler system of the utility model includes boiler and powder unit processed, and boiler is at least one combustion
Burner, powder unit processed include an at least coal pulverizer, as shown in figure 4, the outlet of separator 6 of every coal pulverizer 2 is connected at least
One leads to the powder feeding pipeline 4 of burner, and the separator outlet of coal pulverizer is also connected with auxiliary tube cell 8, and auxiliary tube cell is connected with
Powder-storage bin 9.Powder-storage bin 9 is provided with specified reserves, and the pipeline of auxiliary tube cell 8 is equipped in powder-storage bin 9 coal dust amount lower than specified
The control that control auxiliary tube cell 8 disconnects when control auxiliary tube cell 8 is connected to when reserves, coal dust amount reaches specified reserves in powder-storage bin 9
Valve 5 processed.Powder-storage bin 9 is connected to each powder feeding pipeline 4 and is equipped on the pipeline of connection powder-storage bin and each powder feeding pipeline pulverizer coal feeder 12,
In the normal powder feeding of powder feeding pipeline, pulverized coal feeder control powder-storage bin and powder feeding pipeline are disconnected, and cannot be given when normal powder feeding in powder feeding pipeline
Powder machine controls powder-storage bin and powder feeding pipeline connection.Pulverizer coal feeder can adjust pulverized coal flow according to actual needs, maintain corresponding burning
The normal coal dust of device is supplied, meanwhile, improve coal utilization.It is connected to the pipeline and powder feeding piping connection of powder-storage bin and powder feeding pipeline
Position be equipped with air and powder mixer 11.When there is tripping or breaking coal in coal pulverizer, what air and powder mixer made to be blown by powder feeding pipeline
The coal dust that is fallen in First air and powder-storage bin mixed before entering burner it is more uniform, to make coal dust in the burner
It burns more abundant, improves coal utilization.
Newly-increased separator 10 is connected between auxiliary tube cell 8 and powder-storage bin 9.The coal that newly-increased separator sends out auxiliary tube cell
Powder and First air are separated, and the dilute phase air pipe line 13 towards boiler combustion exhausted stratification of wind is connected on the air outlet of newly-increased separator,
Dilute phase air pipe line is equipped with the valve 15 of control piper on-off.The coal dust that auxiliary tube cell 8 is sent out largely is fallen into powder-storage bin 9,
A small amount of particulate coal dust is carried by First air to be burnt by dilute phase air pipe line feeding boiler 7, to improve coal utilization.Newly-increased point
The top for being located at powder-storage bin 9 from device 10 automatically falls into it in powder-storage bin using the gravity of coal dust.
The specified reserves of powder-storage bin are arranged according to actual needs, meet the power output of a coal pulverizer for a period of time,
Coal pulverizer failure is handled during this or starts other coal pulverizers, avoids causing boiler to go out because tripping or disconnected coal occurs for the coal pulverizer
Fire.
Boiler system further includes control unit, the monitoring unit for monitoring each coal pulverizer working condition and for detecting
The reserves detector of coal dust reserves in powder-storage bin.Monitoring unit and reserves detector, which are controlled with control unit, to be connected.Each powder feeding
Control valve on pipeline, the control valve on auxiliary tube cell pipeline and pulverizer coal feeder, which are also all controlled with control unit, to be connected.
When detection unit detects that certain coal pulverizer stops coal dust at once, sending a signal to control unit.Control is single
Member controls pulverizer coal feeder corresponding with corresponding coal pulverizer according to the signal received and opens, and makes corresponding powder-storage bin as new coal dust
Source continues to supply coal dust to burner, to keep coal dust supply uninterrupted, maintains the burning of burner.In powder-storage bin powder supply
This TV station coal pulverizer failure is handled in this period, after trouble shooting, makes coal pulverizer continue to give burner powder supply, detection unit is sent
Signal controls corresponding pulverizer coal feeder according to the signal received and closes to control unit, control unit.Certainly, if this TV station coal-grinding
Machine breaks down, and also can star other coal pulverizers.General thermal power plant large-sized boiler is equipped with more coal pulverizers, coal pulverizer
The quantity that puts into operation is related to the load of boiler.In underload, general 2 to 3 coal pulverizers operation, has the coal pulverizer of stoppage in transit spare.Such as
The disconnected failures such as coal or tripping occur for the coal pulverizer that fruit is currently running, and can star spare coal pulverizer supply fuel to maintain boiler negative
Lotus.Starting a spare coal pulverizer is a relative complex process, needs certain starting time, is started in spare coal pulverizer
In this period before, powder-storage bin, which can be used as new coal dust source, to be continued to supply coal dust to burner, avoids spare coal-grinding
Machine, which has little time starting, leads to boiler extinguishment.
Control when reserves detector detects that coal dust reserves are lower than specified reserves in powder-storage bin on control auxiliary tube cell
Valve is opened, and the coal dust that coal pulverizer is ground is isolated a part and preserved by assisting tube cell to enter in powder-storage bin；When reserves are examined
Survey device and detect that control valve when coal dust reserves in powder-storage bin reach rated capacity on control auxiliary tube cell is closed, pulverized coal bin stop into
Powder.
When coal pulverizer operates normally, the control valve of each powder feeding pipe road is in the open state, and powder feeding pipeline bio-occlusion respectively fires
Burner powder supply, the control valve opened simultaneously on auxiliary tube cell pipeline store a certain amount of coal dust into powder-storage bin, and coal dust reserves reach
Control valve is closed after to specified reserves；When tripping or disconnected coal occur for coal pulverizer, pulverizer coal feeder powder supply, while each powder feeding pipeline are opened
On control valve be still kept open, powder feeding pipeline serves as air duct and blows the coal dust fallen in powder-storage bin to burner,
The fuel supply of burner is maintained, so as to avoid boiler extinguishment.
During depth peak regulation, it also the boiler system can be used to improve the coal powder density of the corresponding burner that puts into operation, reduce kindling
Heat improves combustion stability.
In addition, it is necessary to remark additionally, the vertical coal-grinding either as shown in Figure 2 of coal pulverizer used in boiler system
Machine or the formula coal pulverizer that goes with each other all the time as shown in Figure 3, can reach coal pulverizer occur tripping or when disconnected coal to burner after
Continuous supply coal dust, the use purpose for avoiding boiler extinguishment.
In above-described embodiment, by pulverized coal feeder control pulverized coal flow, in other embodiments, regulating valve can also be used.
It is of course also possible to use shut-off valve, but shut-off valve can only control powder-storage bin and powder feeding pipeline connection or disconnection, not can control coal dust
Flow.
In above-described embodiment, newly-increased separator is located above powder-storage bin, and allowing for makes coal dust using coal dust self gravity
It falls to more convenient in powder-storage bin.Certainly, it being not limited to that, other positions can also be arranged in newly-increased separator, such as
It is arranged below powder-storage bin, coal dust is pumped into powder-storage bin by pumping.
Claims (7)
1. boiler system, including boiler and powder unit processed, boiler has at least one burner, and powder unit processed includes at least one
Coal pulverizer, each separator outlet of every coal pulverizer are connected with the powder feeding pipeline that at least one leads to burner, characterized in that mill
Each separator outlet of coal machine is also connected with auxiliary tube cell, and auxiliary tube cell is connected with powder-storage bin, the pipeline of tube cell is assisted to be equipped with
When control auxiliary tube cell is connected to when coal dust amount is lower than specified reserves in powder-storage bin, coal dust amount reaches specified reserves in powder-storage bin
The control valve that control auxiliary tube cell disconnects, powder-storage bin is with each powder feeding pipeline connection and in the pipe for being connected to powder-storage bin Yu each powder feeding pipeline
Road be equipped in the normal powder feeding of powder feeding pipeline control powder-storage bin and powder feeding pipeline disconnect, powder feeding pipeline cannot normal powder feeding when
Control the control device of powder-storage bin and powder feeding pipeline connection.
2. boiler system according to claim 1, characterized in that the control device is the control that can control pulverized coal flow
Device processed.
3. boiler system according to claim 2, characterized in that the control device is pulverizer coal feeder.
4. boiler system according to claim 1 to 3, characterized in that the pipe of connection powder-storage bin and powder feeding pipeline
Road and the position of powder feeding piping connection are equipped with air and powder mixer.
5. boiler system according to claim 1 to 3, characterized in that between auxiliary tube cell and the powder-storage bin
It is connected with the newly-increased separator for separating wind and coal dust.
6. boiler system according to claim 5, characterized in that be connected on the air outlet of newly-increased separator towards boiler
The dilute phase air pipe line of after-flame stratification of wind, dilute phase air pipe line are equipped with the valve of control dilute phase air pipe line on-off.
7. boiler system according to claim 5, characterized in that the newly-increased separator is located at the top of powder-storage bin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820990793.XU CN208983394U (en) | 2018-06-26 | 2018-06-26 | Boiler system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820990793.XU CN208983394U (en) | 2018-06-26 | 2018-06-26 | Boiler system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208983394U true CN208983394U (en) | 2019-06-14 |
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ID=66779395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820990793.XU Active CN208983394U (en) | 2018-06-26 | 2018-06-26 | Boiler system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360592A (en) * | 2019-08-09 | 2019-10-22 | 上海明华电力科技有限公司 | The disconnected coal control method of coal pulverizer under three operation of coal pulverizing mills of underload |
-
2018
- 2018-06-26 CN CN201820990793.XU patent/CN208983394U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360592A (en) * | 2019-08-09 | 2019-10-22 | 上海明华电力科技有限公司 | The disconnected coal control method of coal pulverizer under three operation of coal pulverizing mills of underload |
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