CN104990073B - Method for regulating load of circulating fluidized bed boiler - Google Patents
Method for regulating load of circulating fluidized bed boiler Download PDFInfo
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- CN104990073B CN104990073B CN201510263539.0A CN201510263539A CN104990073B CN 104990073 B CN104990073 B CN 104990073B CN 201510263539 A CN201510263539 A CN 201510263539A CN 104990073 B CN104990073 B CN 104990073B
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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
- F23C10/28—Control devices specially adapted for fluidised bed, combustion apparatus
Abstract
The invention discloses a method for regulating load of a circulating fluidized bed boiler. The method is characterized in that an ash conditioning step refers to introducing ash in an ash returner into a furnace hearth while opening an ash returning valve on the air returner, enabling high-temperature ash to enter an ash conditioner by an ash discharge pipe which is connected on the ash returning valve, cooling the high-temperature ash by a cold ash chamber in the ash conditioner, introducing fluidizing air, which carries out secondary cooling on high-temperature ash, into a venture fluidizing air chamber of the ash conditioner to form fluidizing air with high pressure flow velocity, opening an isolating valve on the ash returning pipe and blowing low-temperature ash with temperature regulated by the ash conditioner into the ash returning pipe; an ash introducing step refers to enabling ash mixture obtained by mixing ash in the ash returning pipe with low-temperature ash into the furnace hearth; and an ash discharge step refers to directly enabling cooled ash which passes through the ash conditioner to enter a bottom ash cooler through the ash discharge pipe for being discharged. According to the method disclosed by the invention, circulating ash can be flexibly introduced into a boiler and load in the boiler is regulated within a large range, so that combustion efficiency of fuels in the boiler is improved, and steam output of the boiler is increased in a facilitated mode.
Description
Technical field
The present invention relates to Sector of Cfb Boilers, more particularly to a kind of regulation Load of Circulating Fluidized Bed Boiler
Method.
Background technology
The CFBB fluidizing velocity of early stage is higher, therefore referred to as fast circulation bed boiler.Fast circulation bed
The basic theories of boiler can be used for CFBB.The single drum of CFBB employing, natural circulation mode,
Generally it is divided into two vertical shafts in front portion and afterbody.Always to hang structure, surrounding is made up of anterior vertical shaft fin panel casing.From lower and
On, be followed successively by air compartment, emulsion zone, a dilute-phase zone, back-end ductwork be followed successively by from top to bottom high temperature superheater, low temperature superheater and
Economizer, air preheater.Tail vertical well adopts supporting construction, is connected by vertical cyclone separator between two vertical shafts, separates
Device bottom couples loop back device and ash cooler.Combustor and separator interior are equipped with abrasionproof liner, and anterior vertical shaft is managed with Ao
Furnace wall, external metal casing, tail vertical well light boiler setting bear boiler total weight by eight steel columns.Boiler is using under bed
Point kerosene or coal gas, fractional combustion, First air ratio account for 50-60%, and flying dust circulation is low range, and middle temperature separation lime-ash discharge is adopted
With dry type, discharged by water-cooling spiral tapping machine, ash cooler and dust collector ash hopper respectively.
CFBB has a high reliability because of which, high stability, high availability, optimal environmental protection characteristic and
Extensive fuel tolerance, the particularly adaptability to inferior fuel, increasingly get more and more people's extensive concerning.For recycle stream
Fluidized bed boiler, material circulating system are extremely important to the efficiency of combustion of boiler.Material circulating system mainly includes burner hearth, separator
Constitute with feeding back device, the effect of wherein feeding back device is to send the grey and unburnt coal that separator is trapped back to burner hearth combustion
Burn and ensure repeatedly circulation.The load of boiler is not according to circumstances both needs adjustment change, prior art adjustment boiler load
The amount of feeding of wind, coal is relied solely on realizing, this traditional method of adjustment there are two defects：One is that speed is slow；Two is load
Adjusting range is little, only 65%-105%.In recent years, by constantly practice have shown that, excluded by device for cooling ash and store a part
Ash can just change the endocorpuscular concentration of stove, and stove endoparticle concentration is the function of heat transfer coefficient, when stove endoparticle concentration change
Heat transfer coefficient changes therewith, and heat output also just changes therewith, so as to have adjusted the load of boiler.But, when boiler load is adjusted
Terminate, during stable operation, bring two problems again：One is that, in underload, the ash quantity in stove is showed for underload again
Go out too much, bed temperature is relatively low, and efficiency of combustion is low, abrasion is big；Two is the again table for load of the ash quantity in stove in high load capacity
Reveal on the low side, bed temperature is higher, it is impossible to by Load lifting get Tai Gao.
Publication No. CN 101666495, publication date are that the Chinese patent literature of on 03 10th, 2010 discloses a kind of control
The method of material return quantity of hearth of circulating fluidized bed boiler processed, is characterized in that：(1) in the blast cap of the feeding-back valve matched with cyclone separator
Upper increase number of openings；(2) connect two pipelines from air channel to be sent in two feeding back devices respectively, with First air as returning
Send the feedback air of device；(3) set up regulating valve to control feed back air quantity on feed back airduct, directly control returned ash in furnace amount.
The method of the disclosed control material return quantity of hearth of circulating fluidized bed boiler of the patent documentation, as returned ash in furnace amount is straight
Connected cyclone separator feeding-back valve out, the temperature of ash itself is higher, can not absorb more heats, stove into after burner hearth
Bore temperature is difficult to decline, and is difficult at short notice to add more coals, causes boiler peak modulation capacity weak, is unfavorable for that improving boiler produces
Vapour amount.
Publication No. CN 202118901U, publication date are that the Chinese patent literature of on 01 18th, 2012 discloses one kind
The device of regulating circulating ash flow of circulating fluidized bed boiler, it is characterised in that：The device includes ash guiding pipe, flying dust flow-control
Device, heat exchanger, ash-removing valve door and ash releasing tube；The ash guiding pipe is arranged on the bottom of the standpipe of cyclone separator bottom, ash guiding pipe
Outlet be connected with the entrance of heat exchanger, the described outlet of heat exchanger is connected with the entrance of ash releasing tube；Described flying dust
Flow controller is arranged on ash guiding pipe, and described ash-removing valve door is arranged on ash releasing tube.
The device of regulating circulating ash flow of circulating fluidized bed boiler disclosed in the patent documentation, by flying dust flow controller
Coordinate heat exchanger that the circulating ash after heat exchange can be made smoothly to flow into ash releasing tube, ash discharge amount easy to control number and ash discharge speed；But
It is, it is impossible to boiler internal loading is adjusted by circulating ash, boiler endoparticle concentration is wayward, the Load Regulation model of boiler
Enclose narrower, cause boiler fuel combustion efficiency low, be unfavorable for improving boiler duty.
The content of the invention
The present invention is in order to overcome the defect of above-mentioned prior art, there is provided a kind of side of regulation Load of Circulating Fluidized Bed Boiler
Method, the present invention adjust adopted ash conditoner to boiler load, circulating ash can be introduced boiler and to bearing in boiler flexibly
Lotus is adjusted on a large scale, greatly improves the efficiency of combustion of boiler fuel, beneficial to raising boiler duty.
The present invention is achieved through the following technical solutions：
A kind of method for adjusting Load of Circulating Fluidized Bed Boiler, including gray back step and ash discharge step, it is characterised in that：Also
Including adjusting grey step and entering grey step, the gray back step to be referred to and access ash-receiving device in cyclone separator bottom, by ash returning tube
Ash in ash-receiving device is passed through into burner hearth；It is described to adjust grey step to open ash-receiving device while referring to and for the ash in ash-receiving device to be passed through burner hearth
On return grey valve, high temperature ash enters ash conditoner by the dust leg being connected on back on ash valve, and in ash conditoner, cold grey room is entered to high temperature ash
Row cooling, then the venturi fluidisation air compartment that fluidized wind introduces ash conditoner is formed into the fluidized wind with high pressure flow velocity, the fluidized wind
Cooling twice is carried out to high temperature ash, the isolating valve on gray back pipe is opened, the Low Temperature Ash Jing after ash conditoner homoiothermic is blown into ash returning tube
In；It is described enter the grey step ash that refers in ash returning tube mix with Low Temperature Ash after the combination ash that obtains enter burner hearth；The ash discharge step
Suddenly refer to that the ash of the cooling Jing after ash conditoner directly enters slag cooler by cement output tank and discharges.
Also include ash discharge step, the ash discharge step refers to that opening is connected to the ash-valve of the ash releasing tube on ash returning tube, will
The combination ash obtained in ash returning tube is entered in slag cooler by ash releasing tube.
The temperature of the cold grey room is 120-900 degree Celsius.
The blast of the fluidized wind is 0-2500 handkerchiefs.
The venturi fluidisation air compartment and cold grey room insertion, cold ash interior are connected with the first flow equalizing ring from top to bottom in turn
Plate, snakelike cooling coil and the second flow equalizing ring plate, the first flow equalizing ring plate and the second flow equalizing ring plate are loose structure；Venturi stream
Wind-transformation room is formed by the expansion segment of insertion, cylindrical section and contraction section from top to bottom.
The ash returning tube is made up of the mixed grey section returned grey section and be connected on burner hearth being connected on ash-receiving device, return grey section with
Horizontal plane is in 60 degree of angles, mixes ash section horizontal by 45 degree of angles.
The gray back pipe is connected to back the joint of grey section and mixed ash section, and the longitudinal section of gray back Guan Yuleng ash room is pressed from both sides in 45 degree
Angle.
Described time grey section and mixed ash section are formed in one structure.
Roots blower is connected with the middle part of the dust leg, the bottom of dust leg is equipped with ash-removing valve.
The snakelike cooling coil is water-cooled coil pipe or air-cooled type coil pipe, and snakelike cooling coil is arranged horizontally in cold grey room
It is interior.
Deflector is tiltedly installed between the second flow equalizing ring plate and snakelike cooling coil, deflector is equal with gray back pipe
OK.
The deflector is made up of guiding gutter, flow deflector and temperature sensor, and temperature sensor is fixed on guiding gutter, is led
Flow is connected in guiding gutter by triggering spring, and the bottom of guiding gutter is provided with through hole.
Central canal, the diameter of central canal and the diameter phase of cylindrical section are provided with the venturi fluidized wind room
Adaptation.
Beneficial effects of the present invention are mainly manifested in the following aspects：
First, using the present invention, when boiler needs to reduce load, time grey valve on ash-receiving device is opened, is reduced fluidized wind, is returned
Grey in grey device Jing after ash conditoner cooling directly enters slag cooler by cement output tank and discharges, due to the few portion only having in ash returning tube
Circulating ash is divided to enter in burner hearth, fire box temperature will be raised rapidly, and this just can subtract rapidly coal checking, and boiler is reduced rapidly
Load.When boiler needs to increase load, time grey valve on ash-receiving device is opened, cold grey room carries out cold to high temperature ash in ash conditoner
But, then open big fluidized wind, the venturi fluidisation air compartment that fluidized wind introduces ash conditoner is formed into the fluidized wind with high pressure flow velocity, should
Fluidized wind carries out cooling twice to high temperature ash, opens the isolating valve on gray back pipe, and the Low Temperature Ash Jing after ash conditoner homoiothermic is blown into
Mixed in ash returning tube and with the ash in ash returning tube, mixed combination ash is entered
Temperature will reduce more, can add more coals at short notice, the steam production of boiler is obtained in the very short time
Increase, increased boiler peak modulation capacity.By adopting the method, the ash in ash mixing ash returning tube Jing after ash conditoner homoiothermic is entered
In burner hearth, it becomes possible to change the endocorpuscular concentration of stove.Stove endoparticle concentration is the function of heat transfer coefficient, when stove endoparticle concentration becomes
During change, heat transfer coefficient changes therewith, and heat output also just changes therewith, so as to have adjusted boiler load, representative with background technology
Prior art compare, boiler load is responded faster, and load range adjusts bigger, greatly improves the burning of boiler fuel
Efficiency, so as to be beneficial to improve boiler duty.
2nd, the present invention can further pass through to open ash discharge by increasing ash discharge step when mixed ash quantity is more
Part mixed ash is entered in slag cooler rapidly by valve from ash releasing tube, to reduce into the mixing ash quantity in burner hearth, makes burner hearth
Temperature is raised, you can subtract rapidly coal checking, so as to reduce boiler load, adjusts boiler load convenient.
3rd, the temperature of cold grey room is 120-900 degree Celsius, and the temperature province high temperature section is close to the ash temperature in gray back pipe,
Can effectively prevent the connection between gray back Guan Yuleng ash room from producing the phenomenon that drawing crack occurs uneven in temperature, so as to ensure after cooling
The smooth Jing gray backs pipe of Low Temperature Ash, ash returning tube enter burner hearth in, so as to improve boiler peak modulation capacity.
4th, the blast of fluidized wind is 0-2500 handkerchief, using the blast in the range of this, can the cold ash of effective guarantee it is indoor good
Good fluid effect.
5th, " venturi fluidizes air compartment and cold grey room insertion, and cold ash interior is connected with the first flow equalizing ring from top to bottom in turn
Plate, snakelike cooling coil and the second flow equalizing ring plate, the first flow equalizing ring plate and the second flow equalizing ring plate are loose structure；Venturi stream
Wind-transformation room is formed by the expansion segment of insertion, cylindrical section and contraction section from top to bottom ", using the ash conditoner of this ad hoc structure, from
An ash-receiving device ash part out is again introduced into burner hearth by ash returning tube, and the first flow equalizing ring in the cold grey rooms of another part ash Jing
After plate, ash quantity is uniformly dispersed and is difficult to pile up, and the heat of the ash that falls on snakelike cooling coil is absorbed rapidly, the Jing again of the ash after cooling
Second flow equalizing ring plate uniformly fluidizes air compartment through venturi, and Jing cement output tanks are fallen in slag cooler, when needing to boiler internal loading
When being adjusted, the isolating valve on gray back pipe is opened, fluidized wind obtains one after sequentially passing through contraction section, cylindrical section and expansion segment
High pressure flow velocity, can not only strengthen the cooling effect mellow lime to cold grey room, and enable the ash after cooling with an initial velocity
Jing gray back pipes enter ash returning tube, and mixed ash is more easy to burner hearth is entered under the blast of fluidized wind, adjusts boiler load lighter
Pine.
6th, ash returning tube by be connected on ash-receiving device return grey section and the mixed grey section being connected on burner hearth is constituted, return grey section with
Horizontal plane is in 60 degree of angles, mixes ash section horizontal by 45 degree of angles, using the ash returning tube of this ad hoc structure, on the one hand can
The ash in ash-receiving device is smoothly flowed in ash returning tube, on the other hand can enable ash in cold grey room smoothly Jing gray backs
Pipe is entered in ash returning tube, and grey ability is adjusted in raising, is returned grey section and is adopted the arrangement of special angle with mixed grey section, in ensure that ash returning tube
Ash and gray back pipe in ash mixing after on the corner do not pile up, smoothly into burner hearth, it is ensured that the Load Regulation of boiler.
7th, gray back pipe is connected to back the joint of grey section and mixed ash section, and the longitudinal section of gray back Guan Yuleng ash room is pressed from both sides in 45 degree
Angle, it is using this specific angle, grey Jing after fluidisation wind after cold grey room cooling, gray back pipe can be entered with the wind, increase ash
Flow velocity, so as to be prevented effectively from ash joint pile up.
8th, return grey section and mixed ash section is formed in one structure, improve the structural strength of whole ash returning tube, prevent from returning ash
The high temperature ash abrasion ash returning tube corner that device is come in, extends the service life of ash returning tube.
9th, roots blower is connected with the middle part of dust leg, the bottom of dust leg is equipped with ash-removing valve, the wind that roots blower is provided
Power improves can the flow velocity of ash, effectively prevent ash from blocking at ash-removing valve, it is ensured that ash can smoothly into the cold ash of ash conditoner
Cooled down in room.
Tenth, snakelike cooling coil is water-cooled coil pipe or air-cooled type coil pipe, and snakelike cooling coil is arranged horizontally in cold grey room
It is interior, motility can be selected strong, snakelike cooling coil water according to the different snakelike cooling coils for needing to choose the different types of cooling
Plain cloth is put, and can increase its contact area with ash, so as to shorten the cool time of ash, be easy to improve cold grey efficiency.
Deflector, deflector and gray back pipe phase are tiltedly installed between 11, second flow equalizing ring plate and snakelike cooling coil
Parallel, on the one hand, deflector can weaken into the fluidized wind wind speed behind cold grey room, the ash after preventing from cooling down is returned alters to ash-receiving device
In, on the other hand, deflector is parallel with gray back pipe, and under the guiding of deflector, wind direction changes fluidized wind, cold beneficial to making
But the ash after is quickly entered in gray back pipe, so as to improve boiler load adjusting force.
12, deflector is made up of guiding gutter, flow deflector and temperature sensor, and temperature sensor is fixed on guiding gutter,
Flow deflector is connected in guiding gutter by triggering spring, and the bottom of guiding gutter is provided with through hole, using the water conservancy diversion of this ad hoc structure
Plate, as temperature is higher, temperature sensor sends signal to the ash entered from ash-receiving device, and triggering spring drives flow deflector to shrink, ash
Just can discharge from the through hole of water conservancy diversion trench bottom；Conversely, after fluidized wind enters cold grey room, triggering spring drives flow deflector to stretch out, will
Through hole is sealed, and the ash after can preventing from cooling down is returned alters, and cooling ash can be guided smoothly to enter burner hearth, it is ensured that deflector is to cooling
The flexible guiding of ash.
13, central canal, the diameter of central canal and the diameter of cylindrical section are provided with venturi fluidized wind room
Be adapted, ash is cooled down by central canal more smoothly can not only discharge, and the air quantity that fluidized wind is formed can more be concentrated
Cold grey room is entered by central canal, the rapid cooling down high-temperature of snakelike cooling coil is grey beneficial to coordinating.
Description of the drawings
Fig. 1 is the structural representation of CFBB of the present invention；
Fig. 2 is the ash conditoner cross-sectional view in boiler of the present invention；
Fig. 3 is the structural representation of CFBB in the embodiment of the present invention 10；
Fig. 4 is the ash conditoner cross-sectional view of boiler in the embodiment of the present invention 10；
Fig. 5 is the deflector structure schematic diagram in the present invention；
Labelling in figure：1st, cyclone separator, 2, ash-receiving device, 3, ash returning tube, 4, burner hearth, 5, dust leg, 6, ash conditoner, 7, cold
Grey room, 8, venturi fluidisation air compartment, 9, gray back pipe, 10, cement output tank, 11, slag cooler, 12, ash releasing tube, the 13, first flow equalizing ring plate,
14th, snakelike cooling coil, the 15, second flow equalizing ring plate, 16, expansion segment, 17, cylindrical section, 18, contraction section, 19, return grey section, 20, mixed
Grey section, 21, roots blower, 22, deflector, 23, guiding gutter, 24, flow deflector, 25, temperature sensor, 26, triggering spring, 27,
Through hole, 28, central canal.
Specific embodiment
Embodiment 1
Referring to Fig. 1, a kind of method of regulation Load of Circulating Fluidized Bed Boiler, including gray back step and ash discharge step are also wrapped
Including the grey step of tune and entering grey step, the gray back step to be referred to and ash-receiving device 2 is accessed in 1 bottom of cyclone separator, by ash returning tube 3
Ash in ash-receiving device 2 is passed through into burner hearth 4；It is described to adjust grey step to open back while referring to and for the ash in ash-receiving device 2 to be passed through burner hearth 4
Time grey valve on grey device 2, high temperature ash is by being connected on back the dust leg 5 on grey valve into ash conditoner 6, cold grey room 7 pairs in ash conditoner 6
High temperature ash is cooled down, then the venturi fluidisation air compartment 8 that fluidized wind introduces ash conditoner 6 is formed the fluidisation with high pressure flow velocity
Wind, the fluidized wind carry out cooling twice to high temperature ash, open the isolating valve on gray back pipe 9, the Low Temperature Ash Jing after 6 homoiothermic of ash conditoner
It is blown in ash returning tube 3；It is described enter the grey step ash that refers in ash returning tube 3 mix with Low Temperature Ash after the combination ash that obtains enter stove
Thorax 4；The ash discharge step refers to that the ash of the cooling Jing after ash conditoner 6 directly enters slag cooler 11 by cement output tank 10 and discharges.
The present embodiment is most basic embodiment, when boiler needs to reduce load, opens time grey valve on ash-receiving device,
Reduce fluidized wind, grey in ash-receiving device Jing after ash conditoner cooling directly enters slag cooler by cement output tank and discharge, due to only having
Small part circulating ash in ash returning tube is entered in burner hearth, and fire box temperature will be raised rapidly, and this just can subtract rapidly coal checking, pot
Stove is able to reduce rapidly load.When boiler needs to increase load, go back to grey valve on ash-receiving device, cold grey room pair in ash conditoner are opened
High temperature ash is cooled down, then opens big fluidized wind, and the venturi fluidisation air compartment that fluidized wind introduces ash conditoner is formed with high-pressure spray
The fluidized wind of speed, the fluidized wind carry out cooling twice to high temperature ash, open the isolating valve on gray back pipe, Jing after ash conditoner homoiothermic
Mixed during Low Temperature Ash is blown into ash returning tube and with the ash in ash returning tube, mixed combination ash is entered
Heat, fire box temperature will reduce more, can add more coals at short notice, make the steam production of boiler very short
Increased in time, increased boiler peak modulation capacity.Ash mixing ash returning tube by adopting the method, Jing after ash conditoner homoiothermic
In ash enter burner hearth in, it becomes possible to change the endocorpuscular concentration of stove.Stove endoparticle concentration is the function of heat transfer coefficient, when in stove
When granule density changes, heat transfer coefficient changes therewith, and heat output also just changes therewith, so as to have adjusted boiler load, with background skill
In art, representative prior art is compared, and boiler load is responded faster, and load range adjusts bigger, greatly improves in boiler
The efficiency of combustion of fuel, so as to be beneficial to improve boiler duty.
Embodiment 2
Referring to Fig. 3, a kind of method of regulation Load of Circulating Fluidized Bed Boiler, including gray back step and ash discharge step are also wrapped
Including the grey step of tune and entering grey step, the gray back step to be referred to and ash-receiving device 2 is accessed in 1 bottom of cyclone separator, by ash returning tube 3
Ash in ash-receiving device 2 is passed through into burner hearth 4；It is described to adjust grey step to open back while referring to and for the ash in ash-receiving device 2 to be passed through burner hearth 4
Time grey valve on grey device 2, high temperature ash is by being connected on back the dust leg 5 on grey valve into ash conditoner 6, cold grey room 7 pairs in ash conditoner 6
High temperature ash is cooled down, then the venturi fluidisation air compartment 8 that fluidized wind introduces ash conditoner 6 is formed the fluidisation with high pressure flow velocity
Wind, the fluidized wind carry out cooling twice to high temperature ash, open the isolating valve on gray back pipe 9, the Low Temperature Ash Jing after 6 homoiothermic of ash conditoner
It is blown in ash returning tube 3；It is described enter the grey step ash that refers in ash returning tube 3 mix with Low Temperature Ash after the combination ash that obtains enter stove
Thorax 4；The ash discharge step refers to that the ash of the cooling Jing after ash conditoner 6 directly enters slag cooler 11 by cement output tank 10 and discharges.
Also include ash discharge step, the ash discharge step refers to the ash-valve of the ash releasing tube 12 that opening is connected on ash returning tube 3,
The combination ash obtained in ash returning tube 3 is entered in slag cooler 11 by ash releasing tube 12.
The temperature of the cold grey room is 120 degrees Celsius.
The present embodiment is a better embodiment, by increasing ash discharge step, when mixed ash quantity is more, Neng Goujin
Part mixed ash is entered in slag cooler from ash releasing tube rapidly by one step by opening ash-valve, to reduce in burner hearth
Mixing ash quantity, raises fire box temperature, you can to subtract rapidly coal checking, so as to reduce boiler load, boiler load is adjusted more
It is convenient.Cold grey room adopts the ash temperature in this temperature, high temperature section and gray back pipe to be close to, effectively can prevent gray back Guan Yuleng ash room it
Between connection produce it is uneven in temperature occur drawing crack phenomenon, so as to ensure cool down after the smooth Jing gray backs pipe of Low Temperature Ash, ash returning tube
Into in burner hearth, so as to improve boiler peak modulation capacity.
Embodiment 3
Referring to Fig. 3, a kind of method of regulation Load of Circulating Fluidized Bed Boiler, including gray back step and ash discharge step are also wrapped
Including the grey step of tune and entering grey step, the gray back step to be referred to and ash-receiving device 2 is accessed in 1 bottom of cyclone separator, by ash returning tube 3
Ash in ash-receiving device 2 is passed through into burner hearth 4；It is described to adjust grey step to open back while referring to and for the ash in ash-receiving device 2 to be passed through burner hearth 4
Time grey valve on grey device 2, high temperature ash is by being connected on back the dust leg 5 on grey valve into ash conditoner 6, cold grey room 7 pairs in ash conditoner 6
High temperature ash is cooled down, then the venturi fluidisation air compartment 8 that fluidized wind introduces ash conditoner 6 is formed the fluidisation with high pressure flow velocity
Wind, the fluidized wind carry out cooling twice to high temperature ash, open the isolating valve on gray back pipe 9, the Low Temperature Ash Jing after 6 homoiothermic of ash conditoner
It is blown in ash returning tube 3；It is described enter the grey step ash that refers in ash returning tube 3 mix with Low Temperature Ash after the combination ash that obtains enter stove
Thorax 4；The ash discharge step refers to that the ash of the cooling Jing after ash conditoner 6 directly enters slag cooler 11 by cement output tank 10 and discharges.
Also include ash discharge step, the ash discharge step refers to the ash-valve of the ash releasing tube 12 that opening is connected on ash returning tube 3,
The combination ash obtained in ash returning tube 3 is entered in slag cooler 11 by ash releasing tube 12.
The temperature of the cold grey room is 200 degrees Celsius.
The blast of the fluidized wind is 0 handkerchief.
The present embodiment is another better embodiment, using specific fluidized wind blast, being capable of the cold ash interior of effective guarantee
Good fluid effect.
Embodiment 4
Referring to Fig. 2 and Fig. 3, a kind of method of regulation Load of Circulating Fluidized Bed Boiler, including gray back step and ash discharge step,
Also including adjusting grey step and entering grey step, the gray back step to be referred to and ash-receiving device 2 is accessed in 1 bottom of cyclone separator, by returning
Ash in ash-receiving device 2 is passed through burner hearth 4 by ash pipe 3；The tune ash step is referred to while the ash in ash-receiving device 2 is passed through burner hearth 4
The grey valve that returns on ash-receiving device 2 is opened, high temperature ash enters ash conditoner 6 by the dust leg 5 being connected on back on grey valve, cold in ash conditoner 6
Grey room 7 is cooled down to high temperature ash, then the venturi fluidisation air compartment 8 that fluidized wind introduces ash conditoner 6 is formed with high pressure flow velocity
Fluidized wind, the fluidized wind carries out cooling twice, opens the isolating valve on gray back pipe 9, Jing after 6 homoiothermic of ash conditoner to high temperature ash
Low Temperature Ash is blown in ash returning tube 3；It is described enter the grey step ash that refers in ash returning tube 3 mix with Low Temperature Ash after the combination ash that obtains
Into burner hearth 4；The ash discharge step refers to that the ash of the cooling Jing after ash conditoner 6 directly enters slag cooler 11 by cement output tank 10 and arranges
Go out.
Also include ash discharge step, the ash discharge step refers to the ash-valve of the ash releasing tube 12 that opening is connected on ash returning tube 3,
The combination ash obtained in ash returning tube 3 is entered in slag cooler 11 by ash releasing tube 12.
The temperature of the cold grey room is 300 degrees Celsius.
The blast of the fluidized wind is 500 handkerchiefs.
The venturi fluidisation air compartment 8 and cold 7 insertion of grey room, are connected with first from top to bottom in turn in cold grey room 7 and flow
Ring flat-plate 13, snakelike cooling coil 14 and the second flow equalizing ring plate 15, the first flow equalizing ring plate 13 and the second flow equalizing ring plate 15 are porous
Structure；Venturi fluidisation air compartment 8 is formed by the expansion segment 16 of insertion, cylindrical section 17 and contraction section 18 from top to bottom.
The ash returning tube 3 is made up of the mixed grey section 20 returned grey section 19 and be connected on burner hearth 4 being connected on ash-receiving device 2,
Grey section 19 is returned horizontal by 60 degree of angles, ash section 20 is mixed horizontal by 45 degree of angles.
The present embodiment is another better embodiment, " venturi fluidizes air compartment and cold grey room insertion, cold ash interior on to
Under be connected with the first flow equalizing ring plate, snakelike cooling coil and the second flow equalizing ring plate, the first flow equalizing ring plate and the second flow equalizing ring in turn
Plate is loose structure；Venturi fluidisation air compartment is formed by the expansion segment of insertion, cylindrical section and contraction section from top to bottom ", adopt
The ash conditoner of this ad hoc structure, is again introduced into burner hearth by ash returning tube from an ash-receiving device ash part out, and another part
Grey Jing after the first flow equalizing ring plate in cold grey room, ash quantity is uniformly dispersed and is difficult accumulation, and fall grey heat on snakelike cooling coil
Absorbed rapidly, the second flow equalizing rings of Jing plate uniformly fluidizes air compartment through venturi to the ash after cooling again, and Jing cement output tanks fall into cold
In slag device, when needing to be adjusted boiler internal loading, the isolating valve on gray back pipe is opened, fluidized wind sequentially passes through contraction
A high pressure flow velocity is obtained after section, cylindrical section and expansion segment, the cooling effect mellow lime to cold grey room can not only be strengthened, and made
Ash after cooling can enter ash returning tube with an initial velocity Jing gray back pipe, and mixed ash is more easy to enter under the blast of fluidized wind
Enter burner hearth, adjust boiler load lighter.Ash returning tube is by time grey section being connected on ash-receiving device and is connected to mixed on burner hearth
Grey section is constituted, and returns grey section horizontal by 60 degree of angles, mixes ash section horizontal by 45 degree of angles, using this ad hoc structure
Ash returning tube, on the one hand can enable the ash in ash-receiving device smoothly flow in ash returning tube, on the other hand can making cold grey room
Ash smoothly Jing gray backs pipe can be entered in ash returning tube, and grey ability is adjusted in raising, returned grey section and adopted the cloth of special angle with mixed grey section
Put, on the corner do not pile up after ensure that the ash mixing in ash and gray back pipe in ash returning tube, smoothly into burner hearth, it is ensured that pot
The Load Regulation of stove.
Embodiment 5
Referring to Fig. 2 and Fig. 3, a kind of method of regulation Load of Circulating Fluidized Bed Boiler, including gray back step and ash discharge step,
Also including adjusting grey step and entering grey step, the gray back step to be referred to and ash-receiving device 2 is accessed in 1 bottom of cyclone separator, by returning
Ash in ash-receiving device 2 is passed through burner hearth 4 by ash pipe 3；The tune ash step is referred to while the ash in ash-receiving device 2 is passed through burner hearth 4
The grey valve that returns on ash-receiving device 2 is opened, high temperature ash enters ash conditoner 6 by the dust leg 5 being connected on back on grey valve, cold in ash conditoner 6
Grey room 7 is cooled down to high temperature ash, then the venturi fluidisation air compartment 8 that fluidized wind introduces ash conditoner 6 is formed with high pressure flow velocity
Fluidized wind, the fluidized wind carries out cooling twice, opens the isolating valve on gray back pipe 9, Jing after 6 homoiothermic of ash conditoner to high temperature ash
Low Temperature Ash is blown in ash returning tube 3；It is described enter the grey step ash that refers in ash returning tube 3 mix with Low Temperature Ash after the combination ash that obtains
Into burner hearth 4；The ash discharge step refers to that the ash of the cooling Jing after ash conditoner 6 directly enters slag cooler 11 by cement output tank 10 and arranges
Go out.
Also include ash discharge step, the ash discharge step refers to the ash-valve of the ash releasing tube 12 that opening is connected on ash returning tube 3,
The combination ash obtained in ash returning tube 3 is entered in slag cooler 11 by ash releasing tube 12.
The temperature of the cold grey room is 400 degrees Celsius.
The blast of the fluidized wind is 800 handkerchiefs.
The venturi fluidisation air compartment 8 and cold 7 insertion of grey room, are connected with first from top to bottom in turn in cold grey room 7 and flow
Ring flat-plate 13, snakelike cooling coil 14 and the second flow equalizing ring plate 15, the first flow equalizing ring plate 13 and the second flow equalizing ring plate 15 are porous
Structure；Venturi fluidisation air compartment 8 is formed by the expansion segment 16 of insertion, cylindrical section 17 and contraction section 18 from top to bottom.
The ash returning tube 3 is made up of the mixed grey section 20 returned grey section 19 and be connected on burner hearth 4 being connected on ash-receiving device 2,
Grey section 19 is returned horizontal by 60 degree of angles, ash section 20 is mixed horizontal by 45 degree of angles.
The gray back pipe 9 is connected to back the joint of grey section 19 and mixed ash section 20, the longitudinal section of gray back pipe 9 and cold grey room 7
In 45 degree of angles.
Described time grey section 19 and mixed ash section 20 are formed in one structure.
The present embodiment is another better embodiment, and gray back pipe is connected to back the joint of grey section and mixed grey section, gray back pipe
Longitudinal section with cold grey room is in 45 degree of angles, using this specific angle, grey Jing after fluidisation wind after cold grey room cooling, energy
Gray back pipe is entered with the wind, the flow velocity of ash is increased, and is piled up in joint so as to be prevented effectively from ash.Return grey section and mixed ash section is integrated
Molding structure, improves the structural strength of whole ash returning tube, prevents from ash-receiving device the high temperature ash abrasion ash returning tube corner come in,
Extend the service life of ash returning tube.
Embodiment 6
Referring to Fig. 2 and Fig. 3, a kind of method of regulation Load of Circulating Fluidized Bed Boiler, including gray back step and ash discharge step,
Also including adjusting grey step and entering grey step, the gray back step to be referred to and ash-receiving device 2 is accessed in 1 bottom of cyclone separator, by returning
Ash in ash-receiving device 2 is passed through burner hearth 4 by ash pipe 3；The tune ash step is referred to while the ash in ash-receiving device 2 is passed through burner hearth 4
The grey valve that returns on ash-receiving device 2 is opened, high temperature ash enters ash conditoner 6 by the dust leg 5 being connected on back on grey valve, cold in ash conditoner 6
Grey room 7 is cooled down to high temperature ash, then the venturi fluidisation air compartment 8 that fluidized wind introduces ash conditoner 6 is formed with high pressure flow velocity
Fluidized wind, the fluidized wind carries out cooling twice, opens the isolating valve on gray back pipe 9, Jing after 6 homoiothermic of ash conditoner to high temperature ash
Low Temperature Ash is blown in ash returning tube 3；It is described enter the grey step ash that refers in ash returning tube 3 mix with Low Temperature Ash after the combination ash that obtains
Into burner hearth 4；The ash discharge step refers to that the ash of the cooling Jing after ash conditoner 6 directly enters slag cooler 11 by cement output tank 10 and arranges
Go out.
Also include ash discharge step, the ash discharge step refers to the ash-valve of the ash releasing tube 12 that opening is connected on ash returning tube 3,
The combination ash obtained in ash returning tube 3 is entered in slag cooler 11 by ash releasing tube 12.
The temperature of the cold grey room is 500 degrees Celsius.
The blast of the fluidized wind is 1000 handkerchiefs.
The venturi fluidisation air compartment 8 and cold 7 insertion of grey room, are connected with first from top to bottom in turn in cold grey room 7 and flow
Ring flat-plate 13, snakelike cooling coil 14 and the second flow equalizing ring plate 15, the first flow equalizing ring plate 13 and the second flow equalizing ring plate 15 are porous
Structure；Venturi fluidisation air compartment 8 is formed by the expansion segment 16 of insertion, cylindrical section 17 and contraction section 18 from top to bottom.
The ash returning tube 3 is made up of the mixed grey section 20 returned grey section 19 and be connected on burner hearth 4 being connected on ash-receiving device 2,
Grey section 19 is returned horizontal by 60 degree of angles, ash section 20 is mixed horizontal by 45 degree of angles.
The gray back pipe 9 is connected to back the joint of grey section 19 and mixed ash section 20, the longitudinal section of gray back pipe 9 and cold grey room 7
In 45 degree of angles.
Described time grey section 19 and mixed ash section 20 are formed in one structure.
The middle part of the dust leg 5 is connected with roots blower 21, and the bottom of dust leg 5 is equipped with ash-removing valve.
The present embodiment is another better embodiment, and roots blower, the bottom dress of dust leg are connected with the middle part of dust leg
There is ash-removing valve, the wind-force that roots blower is provided improves can the flow velocity of ash, effectively prevent ash from blocking at ash-removing valve, it is ensured that ash
Smoothly can be cooled down in the cold grey room of ash conditoner.
Embodiment 7
Referring to Fig. 2 and Fig. 3, a kind of method of regulation Load of Circulating Fluidized Bed Boiler, including gray back step and ash discharge step,
Also including adjusting grey step and entering grey step, the gray back step to be referred to and ash-receiving device 2 is accessed in 1 bottom of cyclone separator, by returning
Ash in ash-receiving device 2 is passed through burner hearth 4 by ash pipe 3；The tune ash step is referred to while the ash in ash-receiving device 2 is passed through burner hearth 4
The grey valve that returns on ash-receiving device 2 is opened, high temperature ash enters ash conditoner 6 by the dust leg 5 being connected on back on grey valve, cold in ash conditoner 6
Grey room 7 is cooled down to high temperature ash, then the venturi fluidisation air compartment 8 that fluidized wind introduces ash conditoner 6 is formed with high pressure flow velocity
Fluidized wind, the fluidized wind carries out cooling twice, opens the isolating valve on gray back pipe 9, Jing after 6 homoiothermic of ash conditoner to high temperature ash
Low Temperature Ash is blown in ash returning tube 3；It is described enter the grey step ash that refers in ash returning tube 3 mix with Low Temperature Ash after the combination ash that obtains
Into burner hearth 4；The ash discharge step refers to that the ash of the cooling Jing after ash conditoner 6 directly enters slag cooler 11 by cement output tank 10 and arranges
Go out.
Also include ash discharge step, the ash discharge step refers to the ash-valve of the ash releasing tube 12 that opening is connected on ash returning tube 3,
The combination ash obtained in ash returning tube 3 is entered in slag cooler 11 by ash releasing tube 12.
The temperature of the cold grey room is 600 degrees Celsius.
The blast of the fluidized wind is 1200 handkerchiefs.
The venturi fluidisation air compartment 8 and cold 7 insertion of grey room, are connected with first from top to bottom in turn in cold grey room 7 and flow
Ring flat-plate 13, snakelike cooling coil 14 and the second flow equalizing ring plate 15, the first flow equalizing ring plate 13 and the second flow equalizing ring plate 15 are porous
Structure；Venturi fluidisation air compartment 8 is formed by the expansion segment 16 of insertion, cylindrical section 17 and contraction section 18 from top to bottom.
The ash returning tube 3 is made up of the mixed grey section 20 returned grey section 19 and be connected on burner hearth 4 being connected on ash-receiving device 2,
Grey section 19 is returned horizontal by 60 degree of angles, ash section 20 is mixed horizontal by 45 degree of angles.
The gray back pipe 9 is connected to back the joint of grey section 19 and mixed ash section 20, the longitudinal section of gray back pipe 9 and cold grey room 7
In 45 degree of angles.
Described time grey section 19 and mixed ash section 20 are formed in one structure.
The middle part of the dust leg 5 is connected with roots blower 21, and the bottom of dust leg 5 is equipped with ash-removing valve.
The snakelike cooling coil 14 is water-cooled coil pipe or air-cooled type coil pipe, and snakelike cooling coil 14 is arranged horizontally in cold
In grey room 7.
The present embodiment is another better embodiment, and snakelike cooling coil is water-cooled coil pipe or air-cooled type coil pipe, snakelike
Cooling coil is arranged horizontally in cold ash interior, can be selected according to the different snakelike cooling coils for needing to choose the different types of cooling
Select motility strong, snakelike cooling coil is horizontally disposed, its contact area with ash can be increased, so as to shorten during the cooling of ash
Between, it is easy to improve cold grey efficiency.
Embodiment 8
Referring to Fig. 3 and Fig. 4, a kind of method of regulation Load of Circulating Fluidized Bed Boiler, including gray back step and ash discharge step,
Also including adjusting grey step and entering grey step, the gray back step to be referred to and ash-receiving device 2 is accessed in 1 bottom of cyclone separator, by returning
Ash in ash-receiving device 2 is passed through burner hearth 4 by ash pipe 3；The tune ash step is referred to while the ash in ash-receiving device 2 is passed through burner hearth 4
The grey valve that returns on ash-receiving device 2 is opened, high temperature ash enters ash conditoner 6 by the dust leg 5 being connected on back on grey valve, cold in ash conditoner 6
Grey room 7 is cooled down to high temperature ash, then the venturi fluidisation air compartment 8 that fluidized wind introduces ash conditoner 6 is formed with high pressure flow velocity
Fluidized wind, the fluidized wind carries out cooling twice, opens the isolating valve on gray back pipe 9, Jing after 6 homoiothermic of ash conditoner to high temperature ash
Low Temperature Ash is blown in ash returning tube 3；It is described enter the grey step ash that refers in ash returning tube 3 mix with Low Temperature Ash after the combination ash that obtains
Into burner hearth 4；The ash discharge step refers to that the ash of the cooling Jing after ash conditoner 6 directly enters slag cooler 11 by cement output tank 10 and arranges
Go out.
Also include ash discharge step, the ash discharge step refers to the ash-valve of the ash releasing tube 12 that opening is connected on ash returning tube 3,
The combination ash obtained in ash returning tube 3 is entered in slag cooler 11 by ash releasing tube 12.
The temperature of the cold grey room is 700 degrees Celsius.
The blast of the fluidized wind is 1600 handkerchiefs.
The venturi fluidisation air compartment 8 and cold 7 insertion of grey room, are connected with first from top to bottom in turn in cold grey room 7 and flow
Ring flat-plate 13, snakelike cooling coil 14 and the second flow equalizing ring plate 15, the first flow equalizing ring plate 13 and the second flow equalizing ring plate 15 are porous
Structure；Venturi fluidisation air compartment 8 is formed by the expansion segment 16 of insertion, cylindrical section 17 and contraction section 18 from top to bottom.
The ash returning tube 3 is made up of the mixed grey section 20 returned grey section 19 and be connected on burner hearth 4 being connected on ash-receiving device 2,
Grey section 19 is returned horizontal by 60 degree of angles, ash section 20 is mixed horizontal by 45 degree of angles.
The gray back pipe 9 is connected to back the joint of grey section 19 and mixed ash section 20, the longitudinal section of gray back pipe 9 and cold grey room 7
In 45 degree of angles.
Described time grey section 19 and mixed ash section 20 are formed in one structure.
The middle part of the dust leg 5 is connected with roots blower 21, and the bottom of dust leg 5 is equipped with ash-removing valve.
The snakelike cooling coil 14 is water-cooled coil pipe or air-cooled type coil pipe, and snakelike cooling coil 14 is arranged horizontally in cold
In grey room 7.
Be tiltedly installed with deflector 22 between the second flow equalizing ring plate 15 and snakelike cooling coil 14, deflector 22 with return
Ash pipe 9 is parallel.
The present embodiment is another better embodiment, is tiltedly installed with and leads between the second flow equalizing ring plate and snakelike cooling coil
Stream plate, deflector are parallel with gray back pipe, on the one hand, deflector can weaken into the fluidized wind wind speed behind cold grey room, prevent
Ash after cooling is returned alters into ash-receiving device, and on the other hand, deflector is parallel with gray back pipe, guiding of the fluidized wind in deflector
Under, wind direction changes, beneficial to making the ash after cooling quickly enter in gray back pipe, so as to improve boiler load adjusting force.
Embodiment 9
Referring to Fig. 3-Fig. 5, a kind of method of regulation Load of Circulating Fluidized Bed Boiler, including gray back step and ash discharge step,
Also including adjusting grey step and entering grey step, the gray back step to be referred to and ash-receiving device 2 is accessed in 1 bottom of cyclone separator, by returning
Ash in ash-receiving device 2 is passed through burner hearth 4 by ash pipe 3；The tune ash step is referred to while the ash in ash-receiving device 2 is passed through burner hearth 4
The grey valve that returns on ash-receiving device 2 is opened, high temperature ash enters ash conditoner 6 by the dust leg 5 being connected on back on grey valve, cold in ash conditoner 6
Grey room 7 is cooled down to high temperature ash, then the venturi fluidisation air compartment 8 that fluidized wind introduces ash conditoner 6 is formed with high pressure flow velocity
Fluidized wind, the fluidized wind carries out cooling twice, opens the isolating valve on gray back pipe 9, Jing after 6 homoiothermic of ash conditoner to high temperature ash
Low Temperature Ash is blown in ash returning tube 3；It is described enter the grey step ash that refers in ash returning tube 3 mix with Low Temperature Ash after the combination ash that obtains
Into burner hearth 4；The ash discharge step refers to that the ash of the cooling Jing after ash conditoner 6 directly enters slag cooler 11 by cement output tank 10 and arranges
Go out.
Also include ash discharge step, the ash discharge step refers to the ash-valve of the ash releasing tube 12 that opening is connected on ash returning tube 3,
The combination ash obtained in ash returning tube 3 is entered in slag cooler 11 by ash releasing tube 12.
The temperature of the cold grey room is 800 degrees Celsius.
The blast of the fluidized wind is 2200 handkerchiefs.
The venturi fluidisation air compartment 8 and cold 7 insertion of grey room, are connected with first from top to bottom in turn in cold grey room 7 and flow
Ring flat-plate 13, snakelike cooling coil 14 and the second flow equalizing ring plate 15, the first flow equalizing ring plate 13 and the second flow equalizing ring plate 15 are porous
Structure；Venturi fluidisation air compartment 8 is formed by the expansion segment 16 of insertion, cylindrical section 17 and contraction section 18 from top to bottom.
The ash returning tube 3 is made up of the mixed grey section 20 returned grey section 19 and be connected on burner hearth 4 being connected on ash-receiving device 2,
Grey section 19 is returned horizontal by 60 degree of angles, ash section 20 is mixed horizontal by 45 degree of angles.
The gray back pipe 9 is connected to back the joint of grey section 19 and mixed ash section 20, the longitudinal section of gray back pipe 9 and cold grey room 7
In 45 degree of angles.
Described time grey section 19 and mixed ash section 20 are formed in one structure.
The middle part of the dust leg 5 is connected with roots blower 21, and the bottom of dust leg 5 is equipped with ash-removing valve.
The snakelike cooling coil 14 is water-cooled coil pipe or air-cooled type coil pipe, and snakelike cooling coil 14 is arranged horizontally in cold
In grey room 7.
Be tiltedly installed with deflector 22 between the second flow equalizing ring plate 15 and snakelike cooling coil 14, deflector 22 with return
Ash pipe 9 is parallel.
The deflector 22 is made up of guiding gutter 23, flow deflector 24 and temperature sensor 25, and temperature sensor 25 is fixed on
On guiding gutter 23, flow deflector 24 is connected in guiding gutter 23 by triggering spring 26, and the bottom of guiding gutter 23 is provided with through hole 27.
The present embodiment is another better embodiment, and deflector is made up of guiding gutter, flow deflector and temperature sensor, temperature
Sensor is fixed on guiding gutter, and flow deflector is connected in guiding gutter by triggering spring, and the bottom of guiding gutter is provided with through hole, adopts
With the deflector of this ad hoc structure, as temperature is higher, temperature sensor sends signal to the ash entered from ash-receiving device, triggers bullet
Spring drives flow deflector to shrink, and ash just can be discharged from the through hole of water conservancy diversion trench bottom；Conversely, after fluidized wind enters cold grey room, triggering bullet
Spring drives flow deflector to stretch out, and through hole is sealed, and the ash after can preventing from cooling down is returned alters, and cooling ash can be guided smoothly to enter stove
Thorax, it is ensured that flexible guiding of the deflector to cooling ash.
Embodiment 10
Referring to Fig. 3-Fig. 5, a kind of method of regulation Load of Circulating Fluidized Bed Boiler, including gray back step and ash discharge step,
Also including adjusting grey step and entering grey step, the gray back step to be referred to and ash-receiving device 2 is accessed in 1 bottom of cyclone separator, by returning
Ash in ash-receiving device 2 is passed through burner hearth 4 by ash pipe 3；The tune ash step is referred to while the ash in ash-receiving device 2 is passed through burner hearth 4
The grey valve that returns on ash-receiving device 2 is opened, high temperature ash enters ash conditoner 6 by the dust leg 5 being connected on back on grey valve, cold in ash conditoner 6
Grey room 7 is cooled down to high temperature ash, then the venturi fluidisation air compartment 8 that fluidized wind introduces ash conditoner 6 is formed with high pressure flow velocity
Fluidized wind, the fluidized wind carries out cooling twice, opens the isolating valve on gray back pipe 9, Jing after 6 homoiothermic of ash conditoner to high temperature ash
Low Temperature Ash is blown in ash returning tube 3；It is described enter the grey step ash that refers in ash returning tube 3 mix with Low Temperature Ash after the combination ash that obtains
Into burner hearth 4；The ash discharge step refers to that the ash of the cooling Jing after ash conditoner 6 directly enters slag cooler 11 by cement output tank 10 and arranges
Go out.
Also include ash discharge step, the ash discharge step refers to the ash-valve of the ash releasing tube 12 that opening is connected on ash returning tube 3,
The combination ash obtained in ash returning tube 3 is entered in slag cooler 11 by ash releasing tube 12.
The temperature of the cold grey room is 900 degrees Celsius.
The blast of the fluidized wind is 2500 handkerchiefs.
The venturi fluidisation air compartment 8 and cold 7 insertion of grey room, are connected with first from top to bottom in turn in cold grey room 7 and flow
Ring flat-plate 13, snakelike cooling coil 14 and the second flow equalizing ring plate 15, the first flow equalizing ring plate 13 and the second flow equalizing ring plate 15 are porous
Structure；Venturi fluidisation air compartment 8 is formed by the expansion segment 16 of insertion, cylindrical section 17 and contraction section 18 from top to bottom.
The ash returning tube 3 is made up of the mixed grey section 20 returned grey section 19 and be connected on burner hearth 4 being connected on ash-receiving device 2,
Grey section 19 is returned horizontal by 60 degree of angles, ash section 20 is mixed horizontal by 45 degree of angles.
The gray back pipe 9 is connected to back the joint of grey section 19 and mixed ash section 20, the longitudinal section of gray back pipe 9 and cold grey room 7
In 45 degree of angles.
Described time grey section 19 and mixed ash section 20 are formed in one structure.
The middle part of the dust leg 5 is connected with roots blower 21, and the bottom of dust leg 5 is equipped with ash-removing valve.
The snakelike cooling coil 14 is water-cooled coil pipe or air-cooled type coil pipe, and snakelike cooling coil 14 is arranged horizontally in cold
In grey room 7.
Be tiltedly installed with deflector 22 between the second flow equalizing ring plate 15 and snakelike cooling coil 14, deflector 22 with return
Ash pipe 9 is parallel.
The deflector 22 is made up of guiding gutter 23, flow deflector 24 and temperature sensor 25, and temperature sensor 25 is fixed on
On guiding gutter 23, flow deflector 24 is connected in guiding gutter 23 by triggering spring 26, and the bottom of guiding gutter 23 is provided with through hole 27.
Central canal 28 is provided with the venturi fluidisation air compartment 8, the diameter of central canal 28 is straight with cylindrical section 17
Footpath size is adapted.
The present embodiment is preferred forms, when boiler needs to reduce load, opens time grey valve on ash-receiving device, reduces
Fluidized wind, grey in ash-receiving device Jing after ash conditoner cooling directly enter slag cooler by cement output tank and discharge, due to only having back ash
Small part circulating ash in pipe is entered in burner hearth, and fire box temperature will be raised rapidly, and this just can subtract rapidly coal checking, and boiler is obtained
To reduce rapidly load.When boiler needs to increase load, time grey valve on ash-receiving device is opened, cold grey room is to high temperature in ash conditoner
Ash is cooled down, then opens big fluidized wind, and the venturi fluidisation air compartment that fluidized wind introduces ash conditoner is formed with high pressure flow velocity
Fluidized wind, the fluidized wind carry out cooling twice to high temperature ash, open the isolating valve on gray back pipe, the low temperature Jing after ash conditoner homoiothermic
Mixed during ash is blown into ash returning tube and with the ash in ash returning tube, mixed combination ash is entered
Amount, fire box temperature will reduce more, can add more coals at short notice, make the steam production of boiler in the very short time
In increased, increased boiler peak modulation capacity.By adopting the method, in the ash mixing ash returning tube Jing after ash conditoner homoiothermic
Ash is entered in burner hearth, it becomes possible to change the endocorpuscular concentration of stove.Stove endoparticle concentration is the function of heat transfer coefficient, when stove endoparticle
During concentration change, heat transfer coefficient changes therewith, and heat output also just changes therewith, so as to have adjusted boiler load, in background technology
Representative prior art is compared, and boiler load is responded faster, and load range adjusts bigger, greatly improves boiler fuel
Efficiency of combustion, so as to be beneficial to improve boiler duty.Central canal is provided with venturi fluidized wind room, the diameter of central canal is big
Little to be adapted with the diameter of cylindrical section, cooling down ash by central canal more smoothly can not only discharge, and fluidized wind shape
Into air quantity more can concentrate cold grey room is entered by central canal, beneficial to coordinating the rapid cooling down high-temperature ash of snakelike cooling coil.
Claims (12)
1. a kind of method for adjusting Load of Circulating Fluidized Bed Boiler, including gray back step and ash discharge step, it is characterised in that：Also wrap
Include the grey step of tune and enter grey step, the gray back step is referred in cyclone separator（1）Access ash-receiving device in bottom（2）, by returning
Ash pipe（3）By ash-receiving device（2）In ash be passed through burner hearth（4）；It is described to adjust grey step to refer to ash-receiving device（2）In ash be passed through burner hearth
（4）While open ash-receiving device（2）On return grey valve, high temperature ash is by the dust leg that is connected on back on ash valve（5）Into ash conditoner
（6）, ash conditoner（6）In cold grey room（7）High temperature ash is cooled down, then fluidized wind is introduced into ash conditoner（6）Venturi fluidisation
Air compartment（8）The fluidized wind with high pressure flow velocity is formed, the fluidized wind carries out cooling twice to high temperature ash, opens gray back pipe（9）On
Isolating valve, Jing ash conditoners（6）Low Temperature Ash after homoiothermic is blown into ash returning tube（3）In；It is described enter grey step refer to ash returning tube（3）
In ash mix with Low Temperature Ash after the combination ash that obtains enter burner hearth（4）；The ash discharge step refers to Jing ash conditoners（6）Afterwards cold
But ash directly passes through cement output tank（10）Into slag cooler（11）And discharge；Also include ash discharge step, the ash discharge step is referred to beats
Open and be connected to ash returning tube（3）On ash releasing tube（12）Ash-valve, by ash returning tube（3）In the combination ash that obtains pass through ash releasing tube
（12）Enter slag cooler（11）In.
2. it is according to claim 1 it is a kind of adjust Load of Circulating Fluidized Bed Boiler method, it is characterised in that：The cold ash
Room（7）Temperature be 120-900 degree Celsius.
3. it is according to claim 1 it is a kind of adjust Load of Circulating Fluidized Bed Boiler method, it is characterised in that：The fluidisation
The blast of wind is 0-2500 handkerchiefs.
4. it is according to claim 1 it is a kind of adjust Load of Circulating Fluidized Bed Boiler method, it is characterised in that：The literary mound
In fluidize air compartment（8）With cold grey room（7）Insertion, cold grey room（7）First flow equalizing ring plate is connected with from top to bottom in turn inside（13）, Serpentiss
Shape cooling coil（14）With the second flow equalizing ring plate（15）, the first flow equalizing ring plate（13）With the second flow equalizing ring plate（15）It is porous knot
Structure；Venturi fluidizes air compartment（8）From top to bottom by the expansion segment of insertion（16）, cylindrical section（17）And contraction section（18）Formed.
5. the method for a kind of regulation Load of Circulating Fluidized Bed Boiler according to claim 1 or 4, it is characterised in that：It is described
Ash returning tube（3）By being connected to ash-receiving device（2）On return grey section（19）Be connected to burner hearth（4）On mixed grey section（20）Constitute, return
Grey section（19）Horizontal by 60 degree of angles, ash section is mixed（20）Horizontal by 45 degree of angles.
6. it is according to claim 5 it is a kind of adjust Load of Circulating Fluidized Bed Boiler method, it is characterised in that：The gray back
Pipe（9）It is connected to back grey section（19）With mixed grey section（20）Joint, gray back pipe（9）With cold grey room（7）Longitudinal section be in 45 degree
Angle.
7. it is according to claim 6 it is a kind of adjust Load of Circulating Fluidized Bed Boiler method, it is characterised in that：Described time grey
Section（19）With mixed grey section（20）Be formed in one structure.
8. it is according to claim 1 it is a kind of adjust Load of Circulating Fluidized Bed Boiler method, it is characterised in that：It is described to put ash
Pipe（5）Middle part be connected with roots blower（21）, dust leg（5）Bottom be equipped with ash-removing valve.
9. it is according to claim 4 it is a kind of adjust Load of Circulating Fluidized Bed Boiler method, it is characterised in that：It is described snakelike
Cooling coil（14）For water-cooled coil pipe or air-cooled type coil pipe, snakelike cooling coil（14）It is arranged horizontally in cold grey room（7）It is interior.
10. it is according to claim 9 it is a kind of adjust Load of Circulating Fluidized Bed Boiler method, it is characterised in that：Described
Two flow equalizing ring plates（15）With snakelike cooling coil（14）Between be tiltedly installed with deflector（22）, deflector（22）With gray back pipe
（9）It is parallel.
A kind of 11. methods for adjusting Load of Circulating Fluidized Bed Boiler according to claim 10, it is characterised in that：It is described to lead
Stream plate（22）By guiding gutter（23）, flow deflector（24）And temperature sensor（25）Constitute, temperature sensor（25）It is fixed on water conservancy diversion
Groove（23）On, flow deflector（24）By triggering spring（26）It is connected to guiding gutter（23）It is interior, guiding gutter（23）Bottom be provided with it is logical
Hole（27）.
A kind of 12. methods for adjusting Load of Circulating Fluidized Bed Boiler according to claim 11, it is characterised in that：The text
Air compartment is fluidized in mound（8）Central canal is provided with inside（28）, central canal（28）Diameter and cylindrical section（17）Diameter
It is adapted.
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| CN201510263539.0A CN104990073B (en) | 2015-05-22 | 2015-05-22 | Method for regulating load of circulating fluidized bed boiler |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1242067A (en) * | 1996-12-31 | 2000-01-19 | 燃烧工程有限公司 | Fuel and sorbent feed for circulating fluidized bed steam generator |
| CN1506610A (en) * | 2002-12-06 | 2004-06-23 | 中国科学院工程热物理研究所 | Cinder cooler for regulating hearth temperature of circulating fluidized bed boiler and its regulation method |
| CN103557523A (en) * | 2013-11-21 | 2014-02-05 | 国家电网公司 | Adjustment method for first full charge of circulating fluidized bed boiler burning high-calorific-value bituminous coal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4221813B2 (en) * | 1999-04-28 | 2009-02-12 | 株式会社Ｉｈｉ | Circulating fluidized bed boiler |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1242067A (en) * | 1996-12-31 | 2000-01-19 | 燃烧工程有限公司 | Fuel and sorbent feed for circulating fluidized bed steam generator |
| CN1506610A (en) * | 2002-12-06 | 2004-06-23 | 中国科学院工程热物理研究所 | Cinder cooler for regulating hearth temperature of circulating fluidized bed boiler and its regulation method |
| CN103557523A (en) * | 2013-11-21 | 2014-02-05 | 国家电网公司 | Adjustment method for first full charge of circulating fluidized bed boiler burning high-calorific-value bituminous coal |
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