CN204114928U - A kind of heavy oil igniting of CFBB and combustion-supporting system - Google Patents
A kind of heavy oil igniting of CFBB and combustion-supporting system Download PDFInfo
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- CN204114928U CN204114928U CN201420495843.9U CN201420495843U CN204114928U CN 204114928 U CN204114928 U CN 204114928U CN 201420495843 U CN201420495843 U CN 201420495843U CN 204114928 U CN204114928 U CN 204114928U
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Abstract
The utility model relates to a kind of heavy oil igniting and combustion-supporting system of CFBB, comprise the heavy oil storage tank, heavy oil filter, heavy oil oil feed pump, heavy fuel heater, flow control valve and the fuel supply flow rate meter that are linked in sequence successively, also comprise the in-duct burner, the auxiliary oil gun on burner or bed on bed that are connected with described flow control valve respectively, described in-duct burner is arranged on the heat primary air road before boiler grid plate, and on described bed, on burner and bed, auxiliary oil gun is evenly arranged along the forward and backward wall of boiler and both walls.The utility model passes through reasonable disposition and arranges oil gun assisted by burner and bed for in-duct burner, bed, optimize in-duct burner structure, make heavy oil can as auxiliary fuel for the igniting of CFBB and underload combustion-supporting, shorten the start-up time of CFBB, reduce and start oil consumption, also meet underload boiler and throw the combustion-supporting needs of oil.The igniting of this heavy oil and combustion-supporting system have good reliability, flexibility and economy.
Description
Technical field
The utility model relates to a kind of heavy oil igniting and combustion-supporting system of CFBB.
Background technology
At present, domestic large-size circulating fluidized bed coal-fired power station boiler generally uses low heat value inferior fuel, adopt light diesel fuel as auxiliary fuel be used for boiler startup igniting and underload combustion-supporting.Some countries in region, Southeast Asia, middle coal, gangue, coal slime etc. are washed because locality has the abundant poor quality that Coal dressing byproduct is as low in calorific value, ash is large, this kind of low calorie fuels of burning in circulating fluid bed boiler is all selected in a lot of power plant for this reason, adopt local market convenient sources and the heavy oil residue of relative low price (abbreviation heavy oil) as boiler startup igniting and the combustion-supporting auxiliary fuel of underload simultaneously, there is good economy, society and environmental benefit.
Because colm, gangue calorific value are low, fugitive constituent is few, igniting, burning, after-flame difficulty, boiler cold-state starts burner hearth when throwing coal and must be heated to certain temperature in advance (coal tossing temperature is relevant with coal-fired volatile matter content, range of temperature is 350 ~ 550 DEG C), the configuration of ignition system directly affects length and the oil consumption height of boiler startup time; Boiler (is generally less than 45%RO) when underrun simultaneously, and fire box temperature is low, combustion instability, needs supplementary certain oils auxiliary fuel to stablize stove combustion.
Heavy oil has that viscosity is high, poor fluidity, the feature that is not easily atomized, if heavy oil temperature not (normally about 110 ~ 130 DEG C) after heating, heavy oil atomizing and combustion efficiency will be affected, unburnt heavy oil can cause burner hearth coking and air distribution plate, heated surface at the end of boiler blocking, affects normal startup and the safe operation of boiler.Therefore be a set of available, stable, reliable, the heavy oil combustion system that efficiency of combustion is high of Circulating fluidized bed boiler design, to shorten CFBB the starting ignition time, to ensure under underload long-term safety stable operation and improve economy of power plant significant.
Summary of the invention
The technical problems to be solved in the utility model is, provide a kind of be applicable to CFBB starting ignition and the combustion-supporting heavy oil combustion system of underload.
The utility model solves the technical scheme that its technical problem adopts: the heavy oil igniting and the combustion-supporting system that construct a kind of CFBB, comprise the heavy oil storage tank be linked in sequence successively, heavy oil filter, heavy oil oil feed pump, heavy fuel heater, flow control valve and fuel supply flow rate meter, also comprise the in-duct burner be connected with described flow control valve respectively, oil gun assisted by burner or bed with bed, described in-duct burner is arranged on the heat primary air road before boiler grid plate, burner and bed assist oil gun before boiler with described bed, rear wall and both walls even, interlaced arrangement.
In such scheme, in described heavy oil storage tank, be provided with storage tank heat device.
In such scheme, described flow control valve is also connected with described heavy oil storage tank by return line, and described return line is provided with oil return cooler.
In such scheme, described return line is also provided with oil return flowmeter.
In such scheme, described heavy oil oil feed pump is also connected in parallel recirculation oil pump.
In such scheme, described in-duct burner adopts extended type structure and multistage adjustable air port.
In such scheme, auxiliary oil gun on burner and/or bed on the multiple beds being arranged on forward and backward wall and side wall, interlaced arrangement on burner hearth horizontal cross-section.
In such scheme, on described bed, burner is arranged on height about 2 ~ 3.5m furnace wall place above boiler grid plate, installs angle 20 ° ~ 33 ° with horizontal plane.
In such scheme, on described bed, auxiliary oil gun is arranged on height about 1.5 ~ 2.5m furnace wall place on boiler grid plate, installs angle 15 ° ~ 20 ° with horizontal plane.
Implement heavy oil igniting and the combustion-supporting system of CFBB of the present utility model, there is following beneficial effect:
To solve heavy oil low temperature flow poor by arranging heavy fuel heater and oil return cooler for the utility model, the safety problem that not easily atomization after-flame and heavy oil storing temperature should not be too high, reasonable disposition and arrange in-duct burner, auxiliary oil gun on burner and/or bed on bed, make heavy oil can as auxiliary fuel for the igniting of CFBB and underload combustion-supporting, shorten the start-up time of CFBB, reduce and start oil consumption, under also meeting underload, the combustion-supporting needs of oil thrown by boiler.The igniting of the utility model heavy oil and combustion-supporting system have good reliability, flexibility and economy.Native system can be widely used in the various CFBB power station unit using heavy oil combustion as starting ignition and the combustion-supporting means of underload.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is system schematic of the present utility model;
Fig. 2 is in-duct burner schematic diagram of the present utility model;
Mark in accompanying drawing:
1. heavy oil storage tank; 2. storage tank heat device; 3. heavy oil filter; 4. heavy oil oil feed pump; 5. heavy fuel heater; 6. CFBB; 7. a upper auxiliary oil gun; 8. in-duct burner; 9. oil return cooler; 10. recycle oil pump; 11. flow control valves; 12. oil-feed flowmeters; 13. oil return flowmeters; 14. upper burners; 15. boiler grid plates.
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing and describe detailed description of the invention of the present utility model in detail.
As shown in Figure 1, the heavy oil igniting of the utility model CFBB and combustion-supporting system mainly comprise heavy oil storage tank 1, storage tank heat device 2, heavy oil filter 3, heavy oil oil feed pump 4, recirculation oil pump 10, heavy fuel heater 5, in-duct burner 8, burner 14, bed assist oil gun 7, oil return cooler 9, flow control valve 11 etc. with bed.Ignition of the boiler and help fuel oil to take from heavy oil storage tank 1, after heavy oil filter 3 impurity screening, heat through heavy fuel heater 5 again after being boosted by heavy oil oil feed pump 4, furol viscosity reduction after heating, good fluidity, be easy to conveying, to be then delivered to respectively on the in-duct burner 8 of CFBB 6, bed on burner 14 and/or bed auxiliary oil gun 7 for boiler startup igniting and underload combustion-supporting.Control the igniting of each burner/auxiliary oil gun and combustion-supporting oil mass by adjust flux control valve 11, remaining heavy oil is got back to heavy oil storage tank 1 and is recycled after oil return cooler 9 cools.
CFBB 6 heavy oil burner divides on bed, and burner 14, bed assist oil gun 7 and in-duct burner 8.Burner 14 and/or bed assist the total load of oil gun 7 to be about 20% ~ 35% of boiler BMCR load with bed.The total load of in-duct burner 8 is about 10% of boiler BMCR load.CFBB 6 can adopt following arbitrary configuration mode to carry out starting ignition: burner 14 on (1) in-duct burner 8 and bed; (2) oil gun 7 assisted by in-duct burner 8 and bed; (3) auxiliary oil gun 7 on burner 14 and bed on in-duct burner 8 and bed; (4) burner 14 on bed; (5) oil gun 7 assisted by burner 14 and bed with bed.
On bed, on burner 14 and bed, auxiliary oil gun 7 is evenly arranged along the forward and backward wall of boiler and both walls, and on the bed of wherein forward and backward wall, auxiliary oil gun 7 interlaced arrangement on burner hearth horizontal cross-section on burner 14 and bed, does not liquidate.On bed, burner 14 is arranged on height about 2 ~ 3.5m furnace wall place above boiler grid plate 15, installs angle 20 ° ~ 33 ° with horizontal plane.On bed, auxiliary oil gun 7 is arranged on height about 1.5 ~ 2.5m furnace wall place on boiler grid plate 15, installs angle 15 ° ~ 20 ° with horizontal plane.On single bed, on burner 14, bed, auxiliary exerting oneself of oil gun 7 is all not more than 3t/h, in order to avoid local heat load is excessive.Each burner joins high-energy igniter and igniting small oil gun.The input quantity of burner is controlled, and the oil mass of each burner is adjustable.
As shown in Figure 2, in-duct burner 8 adopts extended type structure and multistage adjustable air distribution, ensure heavy oil in in-duct burner 8 Thorough combustion, burn.CFBB 6 is lighted a fire and is mainly used in-duct burner 8 to light a fire and burner 14 (or oil gun 7 assisted by bed) on bed, burner 14 (or oil gun 7 assisted by bed) on the combustion-supporting main use bed of boiler at low load.The fuel delivery of in-duct burner 8 is undertaken regulating by the control valve on oil feed line and controls in-duct burner 8 thermic load.On bed, the fuel delivery of burner 14 is regulated by the flow control valve 13 on oil supply pipe, also can control the input quantity of burner on bed 14 (or on bed auxiliary oil gun 7), also available list props up the mode that oil gun fuel-flow control combines with control oil gun input quantity and controls burner 14 thermic load on bed.
Adopt the above-mentioned starting ignition mode with in-duct burner 8, then first with in-duct burner 8, bed material is heated rapidly to about 350 DEG C (depending on dropping into the height of the volatile matter size determination heating-up temperature of coal), being used alone in-duct burner 8 material if continue heats up slower, at this moment burner 14 (or on bed auxiliary oil gun 7) of can increasing input on bed makes bed material be rapidly heated coal tossing temperature (about 550 DEG C), starts oil consumption to shorten start-up time and reduce.After starting to throw coal, on bed, burner 14 (or oil gun 7 assisted by bed) continues to drop into, and along with CFBB 6 load increases, first stops in-duct burner 8, and then on bed, burner 14 (or oil gun 7 assisted by bed) is out of service one by one.Until all burners and/or auxiliary oil gun all out of service after, close operating heavy oil oil feed pump 4, start recirculation oil pump 10, heavy oil supply pipeline enters hot stand-by duty.
Heavy oil storage tank 1 is provided with storage tank steam heater 2, by heavy-oil heating in tank to about 50 DEG C, strengthens the mobility of heavy oil, also avoids too high the reaching of temperature to weigh oil flash simultaneously.
After heavy oil oil feed pump 4, pipeline is provided with heavy fuel heater 5, about 120 DEG C are heated to again by about 50 DEG C with auxiliary steam, reach CFBB 6 burner to the requirement of furol viscosity, decrease pipe-line system flow resistance simultaneously, reduce the lift of heavy oil oil feed pump 4.Oil returning tube is provided with oil return cooler 9, heavy oil temperature is cooled to about 50 DEG C, meet the temperature requirement that heavy oil enters heavy oil storage tank 1, return heavy oil storage tank 1.When normally operation need not throw oil to CFBB 6, heavy fuel heater 5 and oil return cooler 9 are still in hot stand-by duty.
Oil supply pipe is provided with flow control valve 11 and fuel supply flow rate meter 12, oil returning tube is provided with oil return flowmeter 13, carried out the use oil mass of regulating oil gun by adjust flux control valve 11, remaining heavy oil is back to heavy oil storage tank 1.CFBB 6 igniting and combustion-supporting oil mass conveniently can be counted by the data of fuel supply flow rate meter 12 and oil return flowmeter 13.
Oil supply system is provided with recirculation oil pump 10, is arranged in parallel with heavy oil oil feed pump 4, Main Function is when oil is not thrown in the normal operation of circulating fluidized bed boiler of power station 6, maintains oil system stand-by heat.
Operation principle of the present utility model is: the heavy oil in heavy oil storage tank 1 is after heavy oil filter 3 impurity screening, after being boosted by heavy oil oil feed pump 4, heat through heavy fuel heater 5 again, to be then delivered on CFB Boiler road burner 8 and bed burner 14 (or on bed auxiliary oil gun 7) respectively for igniting and combustion-supporting; Controlled the oil mass of oil gun by control valve 11, remaining heavy oil is got back to heavy oil storage tank 1 and is recycled after oil return cooler 9 cools.CFBB igniting can adopt the sparking mode that on burner 14 on in-duct burner 8 and bed and/or bed, auxiliary oil gun 7 combines, and also can adopt separately the sparking mode of burner 14 on bed.If CFBB is configured with in-duct burner 8, first drop into in-duct burner 8 and bed temperature is heated rapidly to about 350 DEG C, when continuing to be used alone in-duct burner 8, bed material heats up slower again, auxiliary oil gun 7 on burner 14 or bed of increasing input on bed makes bed temperature be rapidly heated coal tossing temperature (about 550 DEG C), starts oil consumption to shorten start-up time and reduce.After starting to throw coal, burner 14 or bed assist oil gun 7 to continue to maintain input with bed, along with Load of Circulating Fluidized Bed Boiler increases, first stops in-duct burner 8, then burner 14 or bed assist oil gun 7 out of service one by one with bed.
By reference to the accompanying drawings embodiment of the present utility model is described above; but the utility model is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; do not departing under the ambit that the utility model aim and claim protect, also can make a lot of form, these all belong within protection of the present utility model.
Claims (9)
1. the heavy oil of a CFBB is lighted a fire and combustion-supporting system, it is characterized in that, comprise the heavy oil storage tank, heavy oil filter, heavy oil oil feed pump, heavy fuel heater, flow control valve and the fuel supply flow rate meter that are linked in sequence successively, also comprise the in-duct burner, the auxiliary oil gun on burner or bed on bed that are connected with described flow control valve respectively, described in-duct burner is arranged on the heat primary air road before boiler grid plate, and on described bed, on burner and bed, auxiliary oil gun is evenly arranged along the forward and backward wall of boiler and both walls.
2. the heavy oil of CFBB according to claim 1 is lighted a fire and combustion-supporting system, it is characterized in that, is provided with storage tank heat device in described heavy oil storage tank.
3. the heavy oil of CFBB according to claim 1 is lighted a fire and combustion-supporting system, and it is characterized in that, described flow control valve is also connected with described heavy oil storage tank by return line, and described return line is provided with oil return cooler.
4. the heavy oil of CFBB according to claim 3 is lighted a fire and combustion-supporting system, it is characterized in that, described return line is also provided with oil return flowmeter.
5. the heavy oil of CFBB according to claim 1 is lighted a fire and combustion-supporting system, and it is characterized in that, described heavy oil oil feed pump is also connected in parallel recirculation oil pump.
6. the heavy oil of CFBB according to claim 1 is lighted a fire and combustion-supporting system, it is characterized in that, described in-duct burner adopts extended type structure and multistage adjustable air port.
7. the heavy oil igniting of CFBB according to claim 1 and combustion-supporting system, is characterized in that, auxiliary oil gun on burner and/or bed on the multiple beds being arranged on forward and backward wall and side wall, interlaced arrangement on burner hearth horizontal cross-section.
8. the heavy oil of CFBB according to claim 1 is lighted a fire and combustion-supporting system, and it is characterized in that, on described bed, burner is arranged on high 2 ~ 3.5m furnace wall place above boiler grid plate, installs angle 20 ° ~ 33 ° with horizontal plane.
9. the heavy oil of CFBB according to claim 1 is lighted a fire and combustion-supporting system, it is characterized in that, on described bed, auxiliary oil gun is arranged on high 1.5 ~ 2.5m furnace wall place on boiler grid plate, installs angle 15 ° ~ 20 ° with horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420495843.9U CN204114928U (en) | 2014-08-29 | 2014-08-29 | A kind of heavy oil igniting of CFBB and combustion-supporting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420495843.9U CN204114928U (en) | 2014-08-29 | 2014-08-29 | A kind of heavy oil igniting of CFBB and combustion-supporting system |
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| Publication Number | Publication Date |
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| CN204114928U true CN204114928U (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420495843.9U Expired - Fee Related CN204114928U (en) | 2014-08-29 | 2014-08-29 | A kind of heavy oil igniting of CFBB and combustion-supporting system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105546570A (en) * | 2016-01-25 | 2016-05-04 | 中国能源建设集团广东省电力设计研究院有限公司 | Heavy oil burning system |
| CN105605564A (en) * | 2015-12-30 | 2016-05-25 | 中国华能集团清洁能源技术研究院有限公司 | Smokeless oil-saving starting system of circulating fluidized bed boiler |
| CN106168377A (en) * | 2016-08-15 | 2016-11-30 | 南京工程学院 | A kind of boiler hot flue gas igniter |
| CN108662607A (en) * | 2017-04-01 | 2018-10-16 | 深圳华联世纪生物工程股份有限公司 | A kind of coal-burning boiler changes burning cleaning heavy oil technical solution |
-
2014
- 2014-08-29 CN CN201420495843.9U patent/CN204114928U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605564A (en) * | 2015-12-30 | 2016-05-25 | 中国华能集团清洁能源技术研究院有限公司 | Smokeless oil-saving starting system of circulating fluidized bed boiler |
| CN105546570A (en) * | 2016-01-25 | 2016-05-04 | 中国能源建设集团广东省电力设计研究院有限公司 | Heavy oil burning system |
| CN106168377A (en) * | 2016-08-15 | 2016-11-30 | 南京工程学院 | A kind of boiler hot flue gas igniter |
| CN106168377B (en) * | 2016-08-15 | 2018-02-02 | 南京工程学院 | A kind of boiler hot flue gas igniter |
| CN108662607A (en) * | 2017-04-01 | 2018-10-16 | 深圳华联世纪生物工程股份有限公司 | A kind of coal-burning boiler changes burning cleaning heavy oil technical solution |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200917 Address after: 430223 Room 309, floor 3, Kaidi building, No.1, Jiangxia Avenue, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee after: Wuhan Fengying Energy Technology Engineering Co.,Ltd. Address before: 430223, Jiangxia Road, Jiangxia District, Hubei, Wuhan Province Patentee before: WUHAN KAIDI ELECTRIC POWER ENGINEERING Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150121 Termination date: 20210829 |
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| CF01 | Termination of patent right due to non-payment of annual fee |