CN104613494B - Storage powder device for super or ultra supercritical coal-burning boiler quick load change - Google Patents
Storage powder device for super or ultra supercritical coal-burning boiler quick load change Download PDFInfo
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- CN104613494B CN104613494B CN201410383885.8A CN201410383885A CN104613494B CN 104613494 B CN104613494 B CN 104613494B CN 201410383885 A CN201410383885 A CN 201410383885A CN 104613494 B CN104613494 B CN 104613494B
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Abstract
It is used for the storage powder device of super or ultra supercritical coal-burning boiler quick load change the present invention relates to a kind of, the device is connected by pulverized coal channel with coal pulverizer, described storage powder device includes cyclone separator, powder-storage bin and the machine supplying powder being sequentially connected, and described pulverized coal channel is connected with cyclone separator, machine supplying powder respectively；During unit load down, powder-storage bin is entered by cyclone collection coal dust, while weary gas is backed into pulverized coal channel；Coal dust is discharged by machine supplying powder during unit application of load, and increases the coal-grinding fan delivery needed for conveying automatically.Compared with prior art, the present invention by load shedding when store up powder, it is quick to reduce boiler energy input；Powder is released during application of load, quick increase boiler energy input reaches the target of load quick response.
Description
Technical field
The present invention relates to a kind of coal-burning power plant's frequency modulation peak regulation technique, it is used for super or ultra supercritical more particularly, to one kind coal-fired
The storage powder device of boiler quick load change.
Background technology
Super or ultra-supercritical coal-fired units are generally equipped with medium-speed milling pulverization system, the characteristics of it is delayed by force (pure delay+powder processed
Inertia：120~180 seconds) deficiency of unit load responding ability is determined, especially for the generator for being equipped with Siemens Steam Turbine
Group, because steam turbine is using whole sliding pressure operation mode in the range of peak regulation, unit varying duty load responding at initial stage does not reach grid side
AGC or primary frequency modulation requirement.Coordinated control system is often made up using the method for coal water significantly overshoot, causes the varying duty phase
Between inside unit major parameter fluctuating range it is huge.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind is used to surpass or super
The storage powder device of critical coal-burning boiler quick load change, powder is stored up during by load shedding, quick to reduce boiler energy input；Application of load
When release powder, quick increase boiler energy input reaches the target of load quick response.
The purpose of the present invention can be achieved through the following technical solutions：
It is a kind of to be used for the storage powder device of super or ultra supercritical coal-burning boiler quick load change, the device by pulverized coal channel with
Coal pulverizer is connected, it is characterised in that described storage powder device includes cyclone separator, powder-storage bin and the machine supplying powder being sequentially connected,
Described pulverized coal channel is connected with cyclone separator, machine supplying powder respectively；
During unit load down, powder-storage bin is entered by cyclone collection coal dust, while weary gas is backed into pulverized coal channel：
Coal dust is discharged by machine supplying powder during unit application of load, and increases the coal-grinding fan delivery needed for conveying automatically.
Described powder-storage bin capacity surpasses under the conditions of Changing load-acceleration and the maximum step load of unit as defined in grid side
2 times of accumulative coal amount designs needed for adjusting.
Described powder-storage bin be provided with pressure safety valve, automatic material position device and automatic fire extinguisher, for show material position and
Fire-fighting fire extinguishing.
Described machine supplying powder is that machine supplying powder is measured in frequency conversion, for accurately calculating powder amount.
The work start-stop signal of the storage powder device takes the instruction of grid side peak regulation, and storage powder/release powder speed is surpassed by unit coal amount
Instruction is adjusted to determine.
Described pulverized coal channel is connected by the first magnetic valve with cyclone inlet.
Described machine supplying powder is exported, the weary gas outlet of cyclone separator is connected by the second magnetic valve with pulverized coal channel.
Described magnetic valve is provided with 2-6.
Compared with prior art, the present invention is greatly decreased system delay, effectively carried using the quick response for storing up powder device
The response of high unit frequency modulation peak regulation simultaneously, reduces the coal water short-run disturbance of varying duty initial stage caused by overshoot, cuts down steam temperature vapour pressure etc.
Security during the fluctuation of regulated variable, lifting unit varying duty, the life consumption for delaying unit varying duty to cause.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is the structural representation after the present invention is connected with coal pulverizer.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
As depicted in figs. 1 and 2, it is a kind of to be used for the storage powder device of super or ultra supercritical coal-burning boiler quick load change, the dress
Put and be connected by pulverized coal channel with coal pulverizer 4, described storage powder device includes cyclone separator 1, the and of powder-storage bin 2 being sequentially connected
Machine supplying powder 3, described pulverized coal channel is connected with cyclone separator 1, machine supplying powder 2 respectively；
During unit load down, coal dust is collected by cyclone separator 1 and enters powder-storage bin 2, while weary gas is backed into coal pipe
Road；Coal dust is discharged by machine supplying powder 3 during unit application of load, and increases the coal-grinding fan delivery needed for conveying automatically.
The described capacity of powder-storage bin 2 surpasses under the conditions of Changing load-acceleration and the maximum step load of unit as defined in grid side
2 times of accumulative coal amount designs needed for adjusting.Described powder-storage bin 2 is provided with pressure safety valve 23, automatic material position device 21 and goes out automatically
Fiery device 22, for showing material position and fire-fighting fire extinguishing.Described machine supplying powder 3 is that machine supplying powder is measured in frequency conversion, for accurately calculating powder
Amount.
The work start-stop signal of the storage powder device takes the instruction of grid side peak regulation, and storage powder/release powder speed is surpassed by unit coal amount
Instruction is adjusted to determine.
Described pulverized coal channel is connected by the first magnetic valve 5 with the import of cyclone separator 1.Described machine supplying powder 3 exports,
The outlet of the weary gas of cyclone separator 1 is connected by the second magnetic valve 6 with pulverized coal channel.The first described magnetic valve 5 and the second electromagnetism
Valve 6 is 4.
Claims (5)
1. a kind of be used for the storage powder device of super or ultra supercritical coal-burning boiler quick load change, the device passes through pulverized coal channel and mill
Coal machine is connected, it is characterised in that described storage powder device includes cyclone separator, powder-storage bin and the machine supplying powder being sequentially connected, institute
The pulverized coal channel stated is connected with cyclone separator, machine supplying powder respectively；
During unit load down, powder-storage bin is entered by cyclone collection coal dust, while weary gas is backed into pulverized coal channel；Unit
Coal dust is discharged by machine supplying powder during application of load, and increases the coal-grinding fan delivery needed for conveying automatically；
The work start-stop signal of the storage powder device takes the instruction of grid side peak regulation, and storage powder/release powder speed is referred to by unit coal amount overshoot
Order is determined；
Overshoot institute under the conditions of the maximum step load of described powder-storage bin capacity Changing load-acceleration and unit as defined in grid side
The 2 times of accumulative coal amount designs needed；Described powder-storage bin is provided with pressure safety valve, automatic material position device and automatic fire extinguisher.
2. a kind of storage powder device for super or ultra supercritical coal-burning boiler quick load change according to claim 1, its
It is characterised by, described machine supplying powder measures machine supplying powder for frequency conversion, for accurately calculating powder amount.
3. a kind of storage powder device for super or ultra supercritical coal-burning boiler quick load change according to claim 1, its
It is characterised by, described pulverized coal channel is connected by the first magnetic valve with cyclone inlet.
4. a kind of storage powder device for super or ultra supercritical coal-burning boiler quick load change according to claim 1, its
It is characterised by, described machine supplying powder is exported, the weary gas outlet of cyclone separator is connected by the second magnetic valve with pulverized coal channel.
5. a kind of storage powder device for super or ultra supercritical coal-burning boiler quick load change according to claim 3 or 4,
Characterized in that, described magnetic valve is provided with 2-6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410383885.8A CN104613494B (en) | 2014-08-06 | 2014-08-06 | Storage powder device for super or ultra supercritical coal-burning boiler quick load change |
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| CN201410383885.8A CN104613494B (en) | 2014-08-06 | 2014-08-06 | Storage powder device for super or ultra supercritical coal-burning boiler quick load change |
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| CN104613494A CN104613494A (en) | 2015-05-13 |
| CN104613494B true CN104613494B (en) | 2017-08-25 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108458358A (en) * | 2018-04-28 | 2018-08-28 | 中国大唐集团科学技术研究院有限公司华东分公司 | A kind of coal base distribution boiler transmission ＆ distribution pulverized coal system |
Citations (7)
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| US4064698A (en) * | 1976-09-03 | 1977-12-27 | Westinghouse Electric Corporation | Boiler control having a heating value computer and providing improved operation with fuels having variable heating values |
| JPS6365225A (en) * | 1986-09-08 | 1988-03-23 | Babcock Hitachi Kk | Pulverized coal burning device |
| JPH01305215A (en) * | 1988-06-03 | 1989-12-08 | Ishikawajima Harima Heavy Ind Co Ltd | Pulverized coal feed device |
| CN2293724Y (en) * | 1996-10-03 | 1998-10-07 | 黄声富 | Exhaust gas treatment device in powder making system of power station boiler |
| CN1257757A (en) * | 1999-12-29 | 2000-06-28 | 上海宝钢集团公司 | Tail gas recirculation system for coal injection and pulverization of blast furnace and its control method |
| CN101135443A (en) * | 2007-09-10 | 2008-03-05 | 中电投远达环保工程有限公司 | Storehouse type coal-burning boiler few-oil ignition combustion system |
| CN202229208U (en) * | 2011-05-27 | 2012-05-23 | 中国电力工程顾问集团东北电力设计院 | Furnace smoke drying and water recycling warehouse-type fan mill hot air powder supplying and making system |
-
2014
- 2014-08-06 CN CN201410383885.8A patent/CN104613494B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4064698A (en) * | 1976-09-03 | 1977-12-27 | Westinghouse Electric Corporation | Boiler control having a heating value computer and providing improved operation with fuels having variable heating values |
| JPS6365225A (en) * | 1986-09-08 | 1988-03-23 | Babcock Hitachi Kk | Pulverized coal burning device |
| JPH01305215A (en) * | 1988-06-03 | 1989-12-08 | Ishikawajima Harima Heavy Ind Co Ltd | Pulverized coal feed device |
| CN2293724Y (en) * | 1996-10-03 | 1998-10-07 | 黄声富 | Exhaust gas treatment device in powder making system of power station boiler |
| CN1257757A (en) * | 1999-12-29 | 2000-06-28 | 上海宝钢集团公司 | Tail gas recirculation system for coal injection and pulverization of blast furnace and its control method |
| CN101135443A (en) * | 2007-09-10 | 2008-03-05 | 中电投远达环保工程有限公司 | Storehouse type coal-burning boiler few-oil ignition combustion system |
| CN202229208U (en) * | 2011-05-27 | 2012-05-23 | 中国电力工程顾问集团东北电力设计院 | Furnace smoke drying and water recycling warehouse-type fan mill hot air powder supplying and making system |
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| 国外大型超临界锅炉制粉系统运行改进经验;黄少鹗;《电站辅机》;20020331(第1期);第19-23页 * |
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