CN205480962U - Circulating fluidized bed boiler with quick start -up system - Google Patents
Circulating fluidized bed boiler with quick start -up system Download PDFInfo
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- CN205480962U CN205480962U CN201521133758.9U CN201521133758U CN205480962U CN 205480962 U CN205480962 U CN 205480962U CN 201521133758 U CN201521133758 U CN 201521133758U CN 205480962 U CN205480962 U CN 205480962U
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Abstract
The utility model provides a circulating fluidized bed boiler with quick start -up system, is including the gentle breeze system of flow equalizing, bed material replenishment system, bed combustor system, wind channel combustor system, start fuel system, small -size dense region and adjustable returning charge system, little tympanic bulla fluidization when flow equalizing gentle breeze system implementation boiler starting reduces thermal loss when starting by a wide margin, bed combustor system and wind channel combustor system are equipped with compressed air atomizing oil gun, and combustion efficiency is high, and heat transmission effect is good, starting fuel system and adopting the high volatile coal kind, it easily can throw the coal during firing nature assurance boiler starting as early as possible, saves the fuel, the starting mode of small -size dense region cooperation sunken bed material height can reduce the primary air fan and start the power consumption and shorten come uptime, and intermittent type nature drops into bed material replenishment system after the temperature reaches the setting, the quick start that smokelessly economizes on fuel of boiler has finally been realized to mutually supporting of a plurality of technological links.
Description
Technical field
This utility model belongs to Circulating fluidized bed boiler design and running technology field, be specifically related to a kind of with
The CFBB of quick start system.
Background technology
CFBB due to coal wide accommodation, that pollutant emission is few, load regulation rate is big etc. is excellent
Point has obtained quick development at nearly 10 years, and total installation of generating capacity constantly raises.Limit yet with technical conditions
System, himself still has several drawbacks.Due to the restriction of CFBB self principle, must during startup
The ignition temperature that bed must first be heated to coal could start slowly to throw coal, and active service boiler due to body and
The design reasons of the equipment such as oil gun, it is easy to cause following problem: 1. starting the time long, Fuel Consumption is big；
2. efficiency of combustion is low, and over-emitting black exhaust is serious；3. start-up parameter controls difficulty, easy overtemperature coking or cause fire-resistant
High-abrasive material damages；4. burning is uneven, partial temperature control difficulty.Therefore, shorten the startup time, carry
Rise fuel economy, reduce Fuel Consumption for the operating cost of Properties of CFB and environmental protection index
Suffer from important meaning.
Summary of the invention
For the problem overcoming above-mentioned prior art to exist, the purpose of this utility model be to provide a kind of with
The CFBB of quick start system, shortens boiler startup time, lifting fuel economy, subtracts
Few Fuel Consumption so that boiler operatiopn cost more economically, starts control more stable.
In order to achieve the above object, this utility model adopts the following technical scheme that
A kind of CFBB with quick start system, including being arranged on CFBB
Small size emulsion zone 6 between burner hearth 10 and water cooled wind chamber 9, is arranged on the burner hearth on small size emulsion zone 6
Feed back lower limb 8, adds mouth and is arranged on the bed replenishment system 2 on burner hearth feed back lower limb 8, connect burner hearth feed back lower limb 8
With the adjustable revert system 7 of cyclone separator 11, it is arranged on burner system on the bed on small size emulsion zone 6
System 3 and starting fluid system 5, the current-sharing mild wind system 1 being arranged on water cooled wind chamber 9, be arranged on current-sharing micro-
In-duct burner system 4 on wind system 1；
It is provided with lighter 12, and difference in buner system 3 and in-duct burner system 4 on described bed
It is provided with fuel oil oil gun 13-1 and air channel fuel oil oil gun 13-2, fuel oil oil gun 13-1 and air channel fuel oil on bed on bed
Oil gun 13-2 is all connected to compressed air 14 and igniter fuel 15；On described bed, the quantity of fuel oil oil gun 13-1 is
2～12, combustion share is 0～40%, and start-up temperature is 400～800 DEG C；Described air channel fuel oil oil gun 13-2
Quantity be 2～6, combustion share is 30%～60%, and start-up temperature is 0～800 DEG C；Fuel oil oil gun on bed
13-1 and air channel fuel oil oil gun 13-2 uses compressed air atomization, and compressed-air actuated pressure is 0.5～4.5MPa；
Fuel oil oil gun 13-1 and the Mach 2 ship 0.5～2.5 in fuel oil oil gun 13-2 oil gun exit, air channel on bed, atomization
Post fuel liquid-drop diameter is 10～100 μm, and efficiency of combustion is high, the non-caked oil droplet of wall；In-duct burner system
4 heat resisting temperatures 1100 DEG C；
Store the startup bed through screening in described bed replenishment system 2, start particle mean size
0.5～3mm, maximum particle size 10mm, and more than 5mm granule share is less than the 10% of total particle share,
Starting bed packed height is 400～800mm, supplements bed at any time by bed replenishment system 2, starts bed
The interpolation number of times of material is 1～2 time/hour, and each bed packed height is 10～50mm.
Described starting fluid system 5 possesses trace entry condition, it is possible to 5% according to oepration at full load amount is minimum
Value is run continuously, starts the coal-fired dry ash free basis volatile matter Vdaf of coal bunker more than 20%.
Described current-sharing mild wind system 1 uses micro-bubbling fluidization technology, when critical flowing saturation accounts for operation total the most once
The 15% of air quantity, Fluidization wind rate during startup is the 90%～120% of critical flowing saturation.
The height of described small size emulsion zone 6 accounts for the 10%～15% of burner hearth free height, small size emulsion zone 6 four
Week water-cooling wall and air distribution plate water-cooling wall gather pin, pin density is no less than 20 every square metre, pin material
For Cr25Ni20, the fire-resistant abrasion-proof of covering is moldable, thickness 50～100mm, and thermal shock resistance is strong, at temperature rise model
Enclosing 50～150 DEG C/h, the life-span does not have and is decreased obviously.
Described adjustable revert system 7 uses discontinuity feed, and closed circuit is interrupted input.
Described CFBB uses sliding parameter Starting mode, and toggle speed is fast, avoids drum simultaneously
Up-draft gasifier is excessive and the problem such as superheater over temperature.
The described CFBB cold start time is 3～8 hours, and the warm starting time is 1～3 hour.
Described igniter fuel is diesel oil, gasoline or heavy oil, or coal gas or natural gas.
This utility model starts micro-bubbling fluidization when wind system realizes boiler startup by Micro Fluid, can be significantly
Reduce the loss of heat when starting；On bed, buner system and in-duct burner system are equipped with compressed air atomization
Oil gun, efficiency of combustion is high, and heat-transfer effect is good；Starting fluid system uses high-volatile coal, its inflammability
Ensure can throw as early as possible during boiler startup coal, save fuel oil；Small size emulsion zone coordinates opening of low bed height
Flowing mode can reduce primary air fan and starts power consumption and shorten the heating-up time, interval after temperature reaches setting
Property put into bed replenishment system.Cooperating of multiple sport technique segments finally achieves the quick startup of boiler.
The most relatively, this utility model possesses following advantage:
1. the CFBB startup time after using this technology significantly shortens, and decreases startup fuel oil and uses
Amount, improves Boiler Economical Operation.
2. due to fuel oil burning fully, it is to avoid over-emitting black exhaust during boiler startup, there is the good feature of environmental protection.
3. start-up parameter is easily controllable, it is to avoid the situation that overtemperature coking or Fire and abrasion resistant material damage occurs.
4. boiler combustion is uniform, starts safety and promotes.
Accompanying drawing explanation
Fig. 1 is the circulating fluid bed boiler structure schematic diagram after using rapid starting technique.
Fig. 2 is the oil gun arrangement of buner system on this utility model bed.
Fig. 3 is the oil gun arrangement of this utility model in-duct burner system.
In figure:
1 current-sharing mild wind system 2 bed replenishment system
3 upper buner system 4 in-duct burner systems
5 starting fluid system 6 small size emulsion zones
7 adjustable revert system 8 burner hearth feed back lower limbs
9 water cooled wind chamber 10 burner hearths
11 cyclone separator 12 lighters
Fuel oil oil gun 13-2 air channel fuel oil oil gun on 13-1 bed
14 compressed air 15 igniter fuels
16 coal bunkers
Detailed description of the invention
With specific embodiment, this utility model is described in further detail below in conjunction with the accompanying drawings:
Detailed description of the invention one:
As shown in Figure 1, Figure 2 and Figure 3, as a example by 480t/h CFBB cold start, coal is used
Planting the anthracite for low volatile, the coal-fired dry ash free basis volatile matter Vdaf of starting fluid system is 25%.
Before starting adding bed to 500mm thick, combustion system compressed air 14 pressure is adjusted to 1MPa.Pass through
Bed is maintained micro-bubbling fluidization state by current-sharing mild wind system 1, then puts into in-duct burner system 4, pressure
Igniter fuel 15 is atomized to the tiny oil droplets of diameter 30 μm and sends into air channel and burn by contracting air 14, by
In bed thinner thickness, bed temperature rapid increase, it is 120 DEG C/h that heating rate controls.When bed temperature rises to 400 DEG C
Time, put into buner system 3 on bed.When bed temperature rises to 500 DEG C, starting fluid system 5 puts into, and is
System uses trace coal-feeding mode to run.Throw coal and be gradually increased primary air flow simultaneously, higher than critical flowing saturation,
Prevent to fluidize uneven generation coking phenomenon.During owing to starting, bed is less, for improving bed heat storage capacity
And prevent to blow phenomenon generations such as wearing, utilize bed replenishment system 2 intermittent iron supplement bed after throwing coal, open
The interpolation number of times of movable bed material is 2 times/hour, and each bed packed height is 50mm.When bed temperature rises to
650 DEG C, start to put into coal bunker 16 metabituminous coal, and from stopping starting fluid system coal supply.When bed temperature rises to
Buner system 3 on stoppage in transit in-duct burner system 4 and bed successively when 800 DEG C.Whole start-up course uses sliding
Parameter Starting mode, low parameter steam is sent directly into main steam line and carries out heating coil red switch, along with boiler load
Lifting, steam turbine rotating speed and power increase therewith until rotating speed reach rated speed 3000rpm.Boiler is whole to be opened
Dynamic process continues 7 hours.
Detailed description of the invention two:
As shown in Figure 1, Figure 2 and Figure 3, as a example by 220t/h CFBB warm starting, coal is used
Planting is anthracite, and the coal-fired dry ash free basis volatile matter Vdaf of starting fluid system is 35%.During boiler pressuring fire
Bed is adjusted at about 600mm.After banking fire, bed temperature drops to 400 DEG C, restarts according to warm starting journey
Sequence operates.Start air-introduced machine, fluidized air blower, overfire air fan and primary air fan, combustion system compression sky successively
Gas 14 pressure is adjusted to 1MPa.By current-sharing mild wind system 1, bed maintained micro-bubbling fluidization state,
Then buner system 3 on in-duct burner system 4 and bed is put into.When bed temperature rises to 450 DEG C, start
Fuel system 5 puts into, and system uses trace coal-feeding mode to run, and throws coal and is gradually increased primary air flow simultaneously,
Air quantity is higher than critical flowing saturation, prevents to fluidize uneven generation coking phenomenon.During owing to starting, bed is relatively
Few, for improving bed heat storage capacity and preventing to blow phenomenon generations such as wearing, after throwing coal, utilize bed to supplement system
Uniting 2 intermittent iron supplement bed, the interpolation number of times starting bed is 1 time/hour, and each bed packed height is
50mm.When bed temperature rises to 650 DEG C, start to put into coal bunker 16 metabituminous coal, and from stopping starting fluid system
Coal supply.The burner on stoppage in transit in-duct burner and bed successively when bed temperature rises to 800 DEG C.The whole startup of boiler
Process continues 3 hours.
The description of above example is more concrete, but therefore can not be interpreted as the restriction to this patent scope,
For the person of ordinary skill of the art, without departing from the concept of the premise utility, make
Some deformation and improvement, these broadly fall into protection domain of the present utility model.
Claims (5)
1. the CFBB with quick start system, it is characterized in that: the small size emulsion zone (6) including being arranged between the burner hearth (10) of CFBB and water cooled wind chamber (9), burner hearth feed back lower limb (8) being arranged on small size emulsion zone (6), add the bed replenishment system (2) that mouth is arranged on burner hearth feed back lower limb (8), connect burner hearth feed back lower limb (8) and the adjustable revert system (7) of cyclone separator (11), it is arranged on buner system (3) and starting fluid system (5) on the bed on small size emulsion zone (6), current-sharing mild wind system (1) being arranged on water cooled wind chamber (9), the in-duct burner system (4) being arranged in current-sharing mild wind system (1)；
It is provided with lighter (12) in buner system (3) and in-duct burner system (4) on described bed, and it being respectively arranged with fuel oil oil gun (13-1) and air channel fuel oil oil gun (13-2) on bed, on bed, fuel oil oil gun (13-1) and air channel fuel oil oil gun (13-2) are all connected to compressed air (14) and igniter fuel (15)；On described bed, the quantity of fuel oil oil gun (13-1) is 2～12, and combustion share is 0～40%, and start-up temperature is 400～800 DEG C；The quantity of described air channel fuel oil oil gun (13-2) is 2～6, and combustion share is 30%～60%, and start-up temperature is 0～800 DEG C；On bed, fuel oil oil gun (13-1) and air channel fuel oil oil gun (13-2) use compressed air atomization, and compressed-air actuated pressure is 0.5～4.5MPa；Fuel oil oil gun (13-1) and the Mach 2 ship 0.5～2.5 in fuel oil oil gun (13-2) oil gun exit, air channel on bed, atomization post fuel liquid-drop diameter is 10～100 μm, and efficiency of combustion is high, the non-caked oil droplet of wall；In-duct burner system (4) heat resisting temperature 1100 DEG C；
Store the startup bed through screening in described bed replenishment system (2), start particle mean size 0.5～3mm, maximum particle size 10mm, and more than 5mm granule share less than the 10% of total particle share.
A kind of CFBB with quick start system the most according to claim 1, it is characterised in that: described current-sharing mild wind system (1) uses micro-bubbling fluidization technology.
A kind of CFBB with quick start system the most according to claim 1, it is characterized in that: the height of described small size emulsion zone (6) accounts for the 10%～15% of burner hearth free height, small size emulsion zone (6) surrounding water-cooling wall and air distribution plate water-cooling wall gather pin, pin density is no less than 20 every square metre, pin material is Cr25Ni20, the fire-resistant abrasion-proof covered is moldable, thickness 50～100mm.
A kind of CFBB with quick start system the most according to claim 1, it is characterised in that: described igniter fuel (15) is diesel oil, gasoline or heavy oil, or coal gas or natural gas.
A kind of CFBB with quick start system the most according to claim 1, it is characterized in that: described starting fluid system (5) possesses trace entry condition, can run continuously according to 5% minimum of oepration at full load amount, start the coal-fired dry ash free basis volatile matter Vdaf of coal bunker more than 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521133758.9U CN205480962U (en) | 2015-12-30 | 2015-12-30 | Circulating fluidized bed boiler with quick start -up system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521133758.9U CN205480962U (en) | 2015-12-30 | 2015-12-30 | Circulating fluidized bed boiler with quick start -up system |
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| Publication Number | Publication Date |
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| CN205480962U true CN205480962U (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521133758.9U Active CN205480962U (en) | 2015-12-30 | 2015-12-30 | Circulating fluidized bed boiler with quick start -up system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107448963A (en) * | 2017-08-12 | 2017-12-08 | 浙江千尧环境工程有限公司 | Environmental protection type for smoke recirculating system |
| CN109140431A (en) * | 2018-08-08 | 2019-01-04 | 百色百矿发电有限公司 | A kind of ignition method of circulating fluidized bed boiler |
-
2015
- 2015-12-30 CN CN201521133758.9U patent/CN205480962U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107448963A (en) * | 2017-08-12 | 2017-12-08 | 浙江千尧环境工程有限公司 | Environmental protection type for smoke recirculating system |
| CN109140431A (en) * | 2018-08-08 | 2019-01-04 | 百色百矿发电有限公司 | A kind of ignition method of circulating fluidized bed boiler |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |