CN205102120U - Circulating fluidized bed boiler cold state ignition fuel economizing device - Google Patents
Circulating fluidized bed boiler cold state ignition fuel economizing device Download PDFInfo
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- CN205102120U CN205102120U CN201520516069.XU CN201520516069U CN205102120U CN 205102120 U CN205102120 U CN 205102120U CN 201520516069 U CN201520516069 U CN 201520516069U CN 205102120 U CN205102120 U CN 205102120U
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Abstract
The utility model provides a circulating fluidized bed boiler cold state ignition fuel economizing device, including coal burner and coal -grinding duster, coal burner connects the oil gun, inputs after the coal wearable coal duster grinding in the coal burner. The utility model relates to a this kind of ignition fuel economizing device can realize lighting a fire on circulation fluidization boiler with coal oily mesh of generation when starting to diesel oil ignition method lights the buggy, adopts the bed substituting fuel of pulverized coal combustion down, and guarantee circulating fluidized bed boiler normal boot put into operation, compares the rate of economizing gasoline with current ignition method and reach 92 -95%.
Description
Technical field
The utility model relates to a kind of CFBB cold state spark petroleum economizer, belongs to field of mechanical technique.
Background technology
CFBB is based on burning low grade coal and gangue, caloric value can drop to 900-2000Kcal/Kg, also can burn the flyash having combustible and slag and rubbish, State Council is about notice promulgated by the State Council [2012] No. 19 Energy Saving Industry major fields printing and distributing " 12 " energy-conserving and environment-protective industrial development planning.The efficient pulverized coal combustion such as oxygen enrichment/all-oxygen combustion and equipment and the energy-saving efficient boiler such as large-scale fluidized bed are key popularized projects.CFBB have employed low-temperature burning and sectional combustion, ignition temperature general control is at about 850 DEG C, process air coefficient a=1.2, complete desulfurizing and fixating nitrogen in combustion process simultaneously, when Ca/S ratio is 1.5, desulfurization degree can reach more than 90%, and nitrogen oxide comparatively conventional pulverized-coal stove declines 80%, is less than 150mg/m
3.Desulfuring and denitrifying apparatus need not be equipped with separately, power plant's cost of founding the factory significantly is reduced.Therefore domestic new miniature boiler of installing at present is based on CFBB.The 410T/H CFBB of domestic production is ripe, and adopts in a large number, domestic 200MW(670T/H boiler), 300MW(1000T/H boiler) CFBB also runs.CFBB, burning be the raw coal of particle at 0--20mm, and gangue, need coal dust.Recirculating fluidized bed ignition start, be generally adopt oil gun ignition below grate, after burning, cold air heats by heat smoke, generally needs 6-7 hours, air themperature just can be made to reach 600-700oC, then throws coal and make material bed normal operation input.Adopt coal dust firing, use coal-grinding and powder-spraying machine conventional on kiln.CFBB, adopts fuel oil to start, miniature boiler starting process, 6--8 hour consuming time, oil consumption 3-5 tons, year oil consumption 30-25 tons.Large-sized boiler starts and starts oil consumption 30-50 tons in 8--10 consuming time hour at every turn.Therefore oil consumption cost has become the one of the main reasons that CFBB runs high cost.
Utility model content
The utility model provides a kind of CFBB cold state spark petroleum economizer, when CFBB starts, first lighted in combustion chamber by oil gun, raw coal is milled to after coal dust through coal-grinding and powder-spraying machine, the combustion chambers burn that oil gun lights is delivered to through the pipeline that dusts, after coal dust firing is normal, oil gun can be stopped using.Cold air heats by pulverized coal flame, reaches material bed cranking temperature, makes boiler reach normal startup optimization.Reach the object that replace oil with coal is energy-saving and cost-reducing thus.For solving above technical problem, the utility model provides following technical scheme: a kind of CFBB cold state spark petroleum economizer, comprise coal burner and coal-grinding and powder-spraying machine, coal burner connects oil gun, and the coal in coal burner inputs after coal-grinding and powder-spraying machine grinds.
Further, the air inlet of described coal burner and air outlet place are all connected with cold wind air channel.
Further, on described coal burner, air outlet place connects mixing air channel, and mixing air channel connects fluid bed air compartment, and mixing air channel communicates with the cold wind air channel at coal burner air outlet place.
Further, connect coal pipe between described coal burner and coal-grinding and powder-spraying machine, coal dust is carried from the bottom to top.
This CFBB cold state spark petroleum economizer that the utility model relates to, the bituminous coal adopting volatile matter to be greater than 25%, grinds the coal dust of granularity R90.Be equipped with and burn corresponding coal-grinding and powder-spraying machine with boiler startup ignition under bed, routine 75T/H CFBB, former startup adopts the oil gun of two 250Kg/h, uses coal dust instead, then the coal-fired powder process being not less than about 1000Kg/h should be adopted to equip.Large-sized boiler, by design point bed ignition trigger, designs coal burner by micro-oil gun during design.By former diesel fuel burner, change newly-designed coal burner into, design boiler original coal bunker is to the coal breakage pipeline of coal-grinding and powder-spraying machine, and design duster is to the pipeline that dusts of burner.Redesign coal dust firing flue gas and air mixing air channel, and dock with fluidized-bed combustion boiler lower air duct.Redesign control system DCS to dock with boiler attendance dish, work out new operational procedure.Realize the object of replace oil with coal during ignition trigger on circulating fluidized bed boiler, rate of economizing gasoline reaches 92-95% compared with original sparking mode.This patent take diesel oil as sparking mode, firing coal-dust, coal dust firing replacing fuel oil under employing bed, ensures that CFBB normally starts and puts into operation.
Accompanying drawing explanation
Fig. 1 is a kind of CFBB cold state spark of the utility model petroleum economizer structural representation;
1. coal burner; 2. oil gun; 3. mix air channel; 4. cold wind air channel; 5. coal-grinding and powder-spraying machine; 6. coal pipe; 7. motor; 8. fluid bed air compartment.
Detailed description of the invention
As shown in Figure 1, a kind of CFBB cold state spark petroleum economizer, comprise coal burner 1 and coal-grinding and powder-spraying machine 5, coal burner 1 connects oil gun, and the coal in coal burner 1 inputs after coal-grinding and powder-spraying machine grinds.
Air inlet and the air outlet place of described coal burner 1 are all connected with cold wind air channel 4.
On described coal burner 1, air outlet place connects mixing air channel 3, and mixing air channel 3 connects fluid bed air compartment 8, and mixing air channel 3 communicates with the cold wind air channel 4 at coal burner 1 air outlet place.
Connect coal pipe 6 between described coal burner 1 and coal-grinding and powder-spraying machine 5, coal dust is carried from the bottom to top.
Special coal-grinding and powder-spraying machine purposes and feature: special coal-grinding and powder-spraying machine has one step completed features of kinds of processes flow process such as supply pulverizing, conveyings.Raw coal becomes 80-120um powder through a series of disintegrating process of the machine and is sent into suspension combustion in stove by fan blade with the pressure more than 130 millimeters of water and reach complete combustion purpose.
Coal-grinding and powder-spraying machine adjustment separator deflector baffle aperture, effectively can regulate fineness of pulverized coal in a big way, completely combustion requirements can be met, the change of fineness of pulverized coal depends primarily on the aperture of separator deflector baffle, and when baffle opening is 40%, fineness of pulverized coal is minimum, and coal dust is thinner, incomplete combustion loss is fewer, but crossing fine breeze makes unit power consumption of coal pulverizing raise, and equipment attrition aggravation, service life reduces.Therefore, meeting under Combustion Operation of Boilers requirement, best deflector baffle aperture is obtained by Adjustment Tests, it is generally acknowledged, the best aperture of deflector baffle is 50% ~ 65%, and the coal dust of duster is thinner, coal-grinding power consumption is larger, for No. 7D mill, when fineness of pulverized coal R75 rises to 28.8% and 36.3% by 21%, coal-grinding power consumption is respectively 8.80,7.95, in general the less power consumption of pulverizer adequacy is larger for 7.50kWh/t.
Coal-grinding and powder-spraying machine MP series coal-grinding and powder-spraying machine is the heat energy equipment that Novel coal fired device is mainly used in replacing fuel oil, coal gas and electric power electric heating, thus can save the energy of 40-50%.This product can alleviate the labour intensity of personnel greatly, and it reduces costs features such as increasing economic efficiency, and this equipment integrates fragmentation, grinding, burning of dusting, and injecting coal quantity can regulate arbitrarily, and can realize unmanned automatic operating.
Coal-grinding and powder-spraying machine outlet pulverized coal feed pipe adopts seamless steel pipe to connect.
Existing In Pulverized Coal Burner Design requires:
The flue gas blackness of a, coal burner discharge is Ringelman 0-1 level;
In b, coal burner, lime-ash fixed carbon content is about 0.1%, substantially without carbon dust;
The fractional energy savings of c, new coal powder burner is 15-30%;
In d, burner, flue gas content uses lower flue instead in flue is without any cleaner situation, as long as wind coal combustion is abundant, can be up to state standards;
E, the coal dust time of staying in coal burner high-temperature region is long, and thus efficiency of combustion is high;
During the heating of f, this moulded coal powder burner, ramp-up time shortens, and the thermal efficiency is high, and coal quality requirements is low, and coal is widely applicable;
The igniting of g, coal burner is easy, quick heating, and operating efficiency greatly improves;
Air output, the coal-fired input quantity of h, this burner can change as required, and in regulated in wider range furnace temperature and flame length, can meet actual needs;
Coal burner starting ignition, still adopts diesel ignition oil gun and control system, and in coal burner, self-temperature reaches about 600oC, can spray into coal dust, catches fire after stablizing, stops oil gun.
Burner rear design has cold air and flue gas mixing air channel, mixing ducting outlet is connected with recirculating fluidized bed material layer lower part air compartment, when after cold air and the mixing of burner outlet flue gas, hot air temperature progressively rises, start intensification requirement by recirculating fluidized bed, make fluid bed enter kindling starting state.Fluid bed blow-on process, reaches operational factor, and coal-grinding and powder-spraying machine can be stopped to run.
This patent is selected according to CFBB starting ignition heat consumption, and under routine 75T/h boiler bed, starting ignition is 40Kg/h-60Kg/h oil gun two, for this stove select coal-grinding and powder-spraying machine time, optional MP500-4 coal-grinding and powder-spraying machine two, also optional MP1000-4 mono-.Mated burner is designed to Φ 1500 Х 2400 coal-grinding and powder-spraying machine one.
Detailed description of the invention described in the utility model does not form the restriction to the application's scope; within every spirit in the utility model design and principle, any amendment that one of skill in the art can make, equivalent to replace and improvement etc. all should be included within protection domain of the present utility model.
Claims (4)
1. a CFBB cold state spark petroleum economizer, is characterized in that, comprises coal burner and coal-grinding and powder-spraying machine, and coal burner connects oil gun, and the coal in coal burner inputs after coal-grinding and powder-spraying machine grinds; Coal-grinding and powder-spraying machine adjustment separator deflector baffle aperture, can regulate fineness of pulverized coal, meet combustion requirements, the aperture of separator deflector baffle is depended in the change of fineness of pulverized coal, and when baffle opening is 40%, fineness of pulverized coal is minimum, and coal dust is thinner; Meeting under Combustion Operation of Boilers requirement, the best aperture of deflector baffle is 50% ~ 65%.
2. a kind of CFBB cold state spark petroleum economizer according to claim 1, is characterized in that, air inlet and the air outlet place of described coal burner are all connected with cold wind air channel.
3. a kind of CFBB cold state spark petroleum economizer according to claim 2, it is characterized in that, on described coal burner, air outlet place connects mixing air channel, and mixing air channel connects fluid bed air compartment, and mixing air channel communicates with the cold wind air channel at coal burner air outlet place.
4. a kind of CFBB cold state spark petroleum economizer according to any one of claim 1-3, it is characterized in that, connect coal pipe between described coal burner and coal-grinding and powder-spraying machine, coal dust is carried from the bottom to top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520516069.XU CN205102120U (en) | 2015-07-16 | 2015-07-16 | Circulating fluidized bed boiler cold state ignition fuel economizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520516069.XU CN205102120U (en) | 2015-07-16 | 2015-07-16 | Circulating fluidized bed boiler cold state ignition fuel economizing device |
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| Publication Number | Publication Date |
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| CN205102120U true CN205102120U (en) | 2016-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520516069.XU Expired - Fee Related CN205102120U (en) | 2015-07-16 | 2015-07-16 | Circulating fluidized bed boiler cold state ignition fuel economizing device |
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| CN (1) | CN205102120U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113915608A (en) * | 2021-10-20 | 2022-01-11 | 大唐湘潭发电有限责任公司 | Blow-in oil-saving method for front-back wall opposed combustion type unit |
-
2015
- 2015-07-16 CN CN201520516069.XU patent/CN205102120U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113915608A (en) * | 2021-10-20 | 2022-01-11 | 大唐湘潭发电有限责任公司 | Blow-in oil-saving method for front-back wall opposed combustion type unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160323 Termination date: 20200716 |
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| CF01 | Termination of patent right due to non-payment of annual fee |