CN105020706A - Solid state ignition method for circulating fluidized bed boiler - Google Patents
Solid state ignition method for circulating fluidized bed boiler Download PDFInfo
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- CN105020706A CN105020706A CN201510446688.0A CN201510446688A CN105020706A CN 105020706 A CN105020706 A CN 105020706A CN 201510446688 A CN201510446688 A CN 201510446688A CN 105020706 A CN105020706 A CN 105020706A
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- firebrick
- bed material
- ignition
- distribution plate
- air distribution
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Solid-Fuel Combustion (AREA)
Abstract
The invention relates to a solid state ignition method for a circulating fluidized bed boiler. The method comprises the steps that a layer of bed materials is laid on an air distribution plate, and two layers of ignition bricks formed by evenly mixing fuel and bed materials are evenly placed on the bed materials; a space of 0.5-0.8 square meters is reserved at a boiler entrance for containing firewood, the firewood is burned to ignite the ignition bricks, the ignition bricks burn inwards gradually from the boiler entrance, and the bed materials contained in the ignition bricks, hearth fireproof materials and the bed materials laid on the air distribution plate are heated at the same time; after the fuel burns completely, the bed materials are heated to a temperature being higher than 600 DEG C and evenly scattered onto the air distribution plate; and after the ignition bricks burn completely, primer coals are scattered to the boiler and covered tightly for 10-15 minutes by closing a boiler door, and then a draught fan is started to accelerate flaming. According to the method, biomasses are adopted as the fuel to heat the bed materials to the temperature of 600 DEG C in a solid state, the heating efficiency of the bed materials is improved, the heating time is shortened, and the ignition cost is greatly reduced. Meanwhile, equipment investment is reduced.
Description
Technical field
The present invention relates to a kind of CFBB SSI Solid State Ignition scheme, belong to boiler cold-state start-up technique scheme.
Background technology
CFBB is the clean-burning technology of the new a kind of high-efficiency low-pollution risen in the world, and it is wide that it has combustion adaptive, especially has unique effect to burning of coal inferior, is therefore widely used in China.
CFBB igniting is a very important operation in start-up course.Due to CFBB, before igniting, air distribution plate is wanted to spread the bed material of certain thickness (400mm-500mm).The object of igniting is by some way by bed material heating uniform temperature, until the burning that feeder continuously can be stable to most fuel.
Firewood or Charcoal ignition on bed is mainly taked in bubbling bed boiler and early stage CFBB.This sparking mode needs to add a large amount of firewoods or charcoal in stove, and after burning, the thickness of charcoal fire layer is moderate, and carbon left has strict demand.So operation easier is comparatively large, careless slightlyly very easily cause coking or fire extinguishing.Along with the increase of air distribution plate area, in stove, interpolation timber or charcoal have also become a difficult problem.Therefore which is mainly applied small-sized circular flow and is changed in a boiler.
Increase along with boiler capacity adopts fluidization sparking mode more.Refer to that bed material is heated to firing temperature under fluidized state.It to comprise on bed hot gas ignition under grease gun igniting and bed.The former is that bed material directly heats with oil gun under the state of fluidisation, and the low Fuel Dosage of this mode long thermal efficiency duration of ignition is large especially, so cost is also higher.Fuel-oil atmozation is lighted and is added heat primary air form high-temperature hot flue gas by the latter, adds hott bed material with First air.Because bed material is that to add time of hott bed material shorter for fluidized state heat smoke, cause the igniting thermal efficiency low, though but to take some improvement opportunity fuel consumption still considerable for whole ignition process, and cost remains high always.
Fluidization sparking mode system complex, equipment investment is larger.Needing independently fuel feeding and ignition system, is also simultaneously potential safety hazard, careless slightlyly causes the accident.
Summary of the invention
The object of the invention is, provide a kind of without the need to equipment investment, use cost is cheap, and the CFBB SSI Solid State Ignition scheme of convenient operation, makes fuel add hott bed material in the stationary state.To solve above-mentioned technical problem.
For achieving the above object, the technical solution used in the present invention is: a kind of CFBB SSI Solid State Ignition scheme, it comprises making and the ignition method of a firebrick.It is characterized in that: on air distribution plate, layer overlay can cover the bed material of blast cap, some firebrick two superimposed biomass fuel and bed material are mixed evenly is placed on bed material, and at stove gate, place reserves 0.5-0.8m
2space is not temporarily put a firebrick and puts into firewood, light firewood and point of ignition firebrick, point firebrick is from stove gate propagating combustion gradually inward, by bed material heating contained by self during the burning of some firebrick, the bed material simultaneously heating furnace refractory material and air distribution plate laid, after firewood combustion is complete, reserved some firebrick is put into headspace, the fuel afterburnt, bed material is heated to more than 600 DEG C and is evenly scattered on air distribution plate, be sprinkled into introduction coal after the burning completely of some firebrick, closedown fire door starts blower fan after vexed 10-15 minute and raises fire.
One: the making of some firebrick
1: igniting bed material should use CFBB to arrange discharging bottom slags wide-size distribution particle diameter 0-8mm, wherein below 1mm should be less than 10%, 1-3mm and accounts for 40%, 3-5mm and account for 40%, 5-8mm and account for 10%.Selected bed material should remove ironware foreign material, and bed material total amount is multiplied by the air distribution plate gross area by 300mm thickness and calculates.Particle diameter 0-5mm coal 5kg should be mixed in every square metre.Require that caloric value is at more than 5000kcal, fugitive constituent is not less than 20%.
2: fuel should adopt the biomass energies such as agricultural crop straw, timber, bamboo.Because fuel type is different, different in kind, so firing rate also can be different.But the shaping volume of a firebrick must be met.
3: fuel and bed material are made into a firebrick.Adding adhesive in right amount for increasing some firebrick fastness, fully mixing with a firebrick and simply should ensure that bed material is evenly distributed, and there is good stability.Size is moderate, conveniently enters siege, is easy to put.
4: the hollow cylinder of external diameter 300mm internal diameter 100mm height at 1000mm made by some firebrick.Every square metre of air distribution plate can put 9 pieces, two-layer 18 pieces altogether.Point firebrick total quantity is 18 be multiplied by air distribution plate area.
5: after some firebrick is made into type, drying and processing should be carried out to get rid of moisture.
Two: ignition process
1: should ensure before igniting that air distribution plate cloth wind is even, blast cap aperture is without blocking.
2: lay bed material 100-150mm.Bed material particle diameter 0-8mm wherein 1mm should be less than 10%1-3mm and account for 40%, 3-5mm and account for 40%, 5-8mm and account for 10%, bed material should remove the foreign material such as ironware.Bed material fully should be able to cover blast cap.
3: be evenly placed on air distribution plate by a firebrick, superposition is put two-layer, must ensure that stability is not askew.0.5-0.8m is reserved at each stove gate
2a firebrick is not temporarily put in space.
4: choose length and put into headspace at 30-50cm diameter 3-5cm drying material, be highly greater than 50cm.
5: light timber, lead fire turns, some firebrick from stove gate propagating combustion gradually inward, by bed material heating contained by self during the burning of some firebrick, heat the bed material that refractory material and air distribution plate are laid simultaneously, after firewood combustion is complete, reserved some firebrick is put into headspace.In the fuel afterburnt, bed material can evenly be scattered on air distribution plate.
6: switch fire door mode can be adopted to control air inlet, control point firebrick burning time is at 2-3 hour.
7: whether the some firebrick burning later stage uses creeper checkpoint firebrick to burn completely, the residual brick being embedded in the incomplete after-flame in bottom is routed up and burns away.
8: after the burning completely of some firebrick, be as far as possible evenly sprinkled into particle coal in stove, every square of air distribution plate should be sprinkled into 2-3kg and close the vexed 10-15 minute of fire door.
9: startup air-introduced machine primary air fan maintenance emulsion zone does negative pressure adjustment primary air flow every square metre of air distribution plate and controls at 1500m
3/ h.Start a small amount of coal supply of feeder.
10: due to entering of cold wind, bed temperature can decline to some extent, and bed temperature suitably can reduce primary air flow lower than 700 DEG C, but every square metre of air distribution plate must not lower than 1000m
3/ h.Heating rate is controlled at 10 DEG C/min when bed temperature rises to more than 750 DEG C, if bed temperature raising speed is too fast suitably can increase air quantity, if desired can pulse coal supply.
11: stablize bed temperature when bed temperature rises to 850 DEG C and suitably carry wind coal, ignition of the boiler successfully can tape splicing load.Between the some campaign, other operations are undertaken by operating standard.
This programme takes the technology of SSI Solid State Ignition, adopts living beings to add hott bed material in the stationary state as fuel and reaches 600 DEG C, improve the efficiency of heating surface of bed material, has saved the time of heating, has greatly reduced igniting cost.Save equipment investment simultaneously.
Detailed description of the invention
The bed material laying 400mm-500mm thickness is needed before CFBB igniting.For protection blast cap, first lay the bed material 100mm-150mm that one deck covers blast cap.All the other 300mm are made into a firebrick.
One: the making of some firebrick
1: igniting bed material should use CFBB to arrange discharging bottom slags wide-size distribution particle diameter 0-8mm, wherein below 1mm should be less than 10%, 1-3mm and accounts for 40%, 3-5mm and account for 40%, 5-8mm and account for 10%.Selected bed material should remove ironware foreign material, and bed material total amount is multiplied by the air distribution plate gross area by 300mm thickness and calculates.Particle diameter 0-5mm coal 5kg should be mixed in every square metre.Require that caloric value is at more than 5000kcal, fugitive constituent is not less than 20%.
2: fuel should adopt the biomass energies such as agricultural crop straw, timber, bamboo.Because fuel type is different, different in kind, so firing rate also can be different.But the shaping volume of a firebrick must be met.
3: abundant to fuel and bed material mixing manufacture is become some firebrick.Add adhesive in right amount for increasing some firebrick fastness, some firebrick answers structure simple, ensures that bed material is evenly distributed, and has good stability.Size is moderate, conveniently enters siege, is easy to put.
4: the hollow cylinder of external diameter 300mm internal diameter 100mm height at 1000mm made by some firebrick.Every square metre of air distribution plate can put 9 pieces, two-layer 18 pieces altogether.Point firebrick total quantity is 18 be multiplied by air distribution plate area.
5: after some firebrick is made into type, drying and processing should be carried out to get rid of moisture.
Two: ignition process
1: should ensure before igniting that air distribution plate cloth wind is even, blast cap aperture is without blocking.
2: lay bed material 100-150mm.Bed material particle diameter 0-8mm wherein 1mm should be less than 10%1-3mm and account for 40%, 3-5mm and account for 40%, 5-8mm and account for 10%, bed material should remove the foreign material such as ironware.Bed material should be able to fully cover a cap.
3: be evenly placed on air distribution plate by a firebrick, superposition is put two-layer, must ensure that stability is not askew.0.5-0.8m is reserved at each stove gate
2a firebrick is not temporarily put in space.
4: choose length and put into headspace at 30-50cm diameter 3-5cm drying material, be highly greater than 50cm.
5: light timber, lead fire turns, and some firebrick, from stove gate propagating combustion gradually inward, by bed material heating contained by self during the burning of some firebrick, heats castable simultaneously, firewood combustion completely after reserved some firebrick is put into headspace.In the fuel afterburnt, bed material can evenly be scattered on air distribution plate.
6: switch fire door can be adopted to control air inlet, control point firebrick burning time is at 2-3 hour.
7: whether the some firebrick burning later stage uses creeper checkpoint firebrick to burn completely, the residual brick being embedded in the incomplete after-flame in bottom is routed up and burns away.
8: after the burning completely of some firebrick, be as far as possible evenly sprinkled into particle coal in stove, every square of air distribution plate should be sprinkled into 2-3kg and close the vexed 10-15 minute of fire door.
9: startup air-introduced machine primary air fan maintenance emulsion zone does negative pressure adjustment primary air flow every square metre of air distribution plate and controls at 1500m
3/ h.Start a small amount of coal supply of feeder.
10: due to entering of cold wind, bed temperature can decline to some extent, and bed temperature suitably can reduce primary air flow lower than 700 DEG C, but every square metre of air distribution plate must not lower than 1000m
3/ h.Heating rate is controlled at 10 DEG C/min when bed temperature rises to more than 750 DEG C, if bed temperature raising speed is too fast suitably can increase air quantity, if desired can pulse coal supply.
11: stablize bed temperature when bed temperature rises to 850 DEG C and suitably carry wind coal, ignition of the boiler successfully can tape splicing load.
Claims (4)
1. a CFBB SSI Solid State Ignition scheme, it is characterized in that: on air distribution plate, layer overlay can cover the bed material of blast cap, point firebrick two superimposed biomass fuel and bed material are mixed evenly is placed on bed material, and at stove gate, place reserves 0.5-0.8m
2space is not temporarily put a firebrick and puts into firewood, light firewood and point of ignition firebrick, point firebrick is from stove gate propagating combustion gradually inward, by bed material heating contained by self during the burning of some firebrick, the bed material simultaneously heating furnace refractory material and air distribution plate laid, after firewood combustion is complete, reserved some firebrick is put into headspace, the fuel afterburnt, bed material is heated to more than 600 DEG C and is evenly scattered on air distribution plate, be sprinkled into introduction coal after the burning completely of some firebrick, closedown fire door starts blower fan after vexed 10-15 minute and raises fire.
2. CFBB SSI Solid State Ignition scheme according to claim 1, it is characterized in that: some firebrick bed material should use CFBB to arrange discharging bottom slags, wide-size distribution particle diameter 0-8mm, wherein below 1mm should be less than 10%, 1-3mm accounts for 40%, 3-5mm accounts for 40%, 5-8mm accounts for 10%, selected bed material should remove ironware foreign material, and bed material total amount is multiplied by the air distribution plate gross area by 300mm thickness and calculates volume, should mix the coal 15kg of particle diameter 0-5mm in every cubic metre of bed material, require that caloric value is at more than 5000kcal, fugitive constituent is not less than 20%.
3. CFBB SSI Solid State Ignition scheme according to claim 1, is characterized in that: hollow cylinder made by some firebrick.
4. CFBB SSI Solid State Ignition scheme according to claim 1, is characterized in that: switch fire door mode can be adopted to control air inlet, and control point firebrick burning time is at 2-3 hour.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510446688.0A CN105020706A (en) | 2015-07-26 | 2015-07-26 | Solid state ignition method for circulating fluidized bed boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510446688.0A CN105020706A (en) | 2015-07-26 | 2015-07-26 | Solid state ignition method for circulating fluidized bed boiler |
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| CN105020706A true CN105020706A (en) | 2015-11-04 |
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| CN201510446688.0A Pending CN105020706A (en) | 2015-07-26 | 2015-07-26 | Solid state ignition method for circulating fluidized bed boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108730965A (en) * | 2017-04-24 | 2018-11-02 | 北新集团建材股份有限公司 | Fluidized bed furnace ignition system control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1033833A (en) * | 1987-12-25 | 1989-07-12 | 王庆臣 | Plant-fibre type up-ignited briquet and processing method |
| CN1041928A (en) * | 1989-11-09 | 1990-05-09 | 南江县白鹿饲料厂 | Non-fuel autoignition sintered brick |
| CN2163303Y (en) * | 1992-09-24 | 1994-04-27 | 煤炭科学研究总院 | Bottom igniting device of fluidized-bed boiler |
| CN101760275A (en) * | 2010-01-05 | 2010-06-30 | 山西大学 | Square ignition briquette and production method thereof |
| CN102095196A (en) * | 2011-03-08 | 2011-06-15 | 张全胜 | Oilless ignition method of fluidized bed boiler |
| CN103499093A (en) * | 2013-09-26 | 2014-01-08 | 吉木萨尔县光源发电有限责任公司 | Starting ignition method of circulating fluidized bed boiler |
-
2015
- 2015-07-26 CN CN201510446688.0A patent/CN105020706A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1033833A (en) * | 1987-12-25 | 1989-07-12 | 王庆臣 | Plant-fibre type up-ignited briquet and processing method |
| CN1041928A (en) * | 1989-11-09 | 1990-05-09 | 南江县白鹿饲料厂 | Non-fuel autoignition sintered brick |
| CN2163303Y (en) * | 1992-09-24 | 1994-04-27 | 煤炭科学研究总院 | Bottom igniting device of fluidized-bed boiler |
| CN101760275A (en) * | 2010-01-05 | 2010-06-30 | 山西大学 | Square ignition briquette and production method thereof |
| CN102095196A (en) * | 2011-03-08 | 2011-06-15 | 张全胜 | Oilless ignition method of fluidized bed boiler |
| CN103499093A (en) * | 2013-09-26 | 2014-01-08 | 吉木萨尔县光源发电有限责任公司 | Starting ignition method of circulating fluidized bed boiler |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108730965A (en) * | 2017-04-24 | 2018-11-02 | 北新集团建材股份有限公司 | Fluidized bed furnace ignition system control method |
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Application publication date: 20151104 |