CN209084749U - A kind of circulating fluidized bed boiler circulating ratio and grey balance regulator control system - Google Patents
A kind of circulating fluidized bed boiler circulating ratio and grey balance regulator control system Download PDFInfo
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- CN209084749U CN209084749U CN201821421467.3U CN201821421467U CN209084749U CN 209084749 U CN209084749 U CN 209084749U CN 201821421467 U CN201821421467 U CN 201821421467U CN 209084749 U CN209084749 U CN 209084749U
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Abstract
The utility model discloses circulating fluidized bed boiler circulating ratio and grey balance regulator control system, including circulating fluidized bed boiler, control unit, circulating fluidized bed boiler includes burner hearth, cyclone separator, dipleg, material returning device, connect flue, tail vertical well, burner hearth is connect with cyclone separator, cyclone separator upper end is connect with tail vertical well, cyclone separator lower end is connect with material returning device upper end, material returning device lower end is connect with lower furnace portion, cyclone separator is equipped with the gas spray gun being transported to the hot wind in hot air pipe in cyclone separator, gas pressure signal acquisition module is equipped in circulating fluidized bed boiler, gas pressure signal acquisition module is connect with control unit, control the working condition of spray gun；The utility model is according to boiler operating state dynamic regulation, real time monitoring, the requirement for meeting boiler different types of coal different load operating condition down regulation boiler circulating ratio and grey balance solves high-effect coal for circulation fluid bed boiler kind bad adaptability, the problems such as load adjustment performance is bad.
Description
Technical field
The utility model relates to Sector of Cfb Boilers more particularly to a kind of circulating fluidized bed boiler circulations times
Rate and grey balance regulator control system.
Background technique
It is wide that circulating fluidized bed boiler has the characteristics that cleaning, environmental protection, coal adapt to, by the most attention of countries in the world,
It was rapidly developed at nearest more than 30 years, and the best clean coal burning technology of commercialization degree at present.
The advantage of circulating fluidized bed boiler clean coal burning is coal-fired circulating combustion, low-temperature burning, sectional combustion, object
Material concentration DYNAMIC DISTRIBUTION is the key parameter for influencing boiler technology performance in material circulatory system performance, especially burner hearth.
" fluidised form reconstruct " is the advanced achievements of Materiais for CFB Boilers circulating technology research.Recirculating fluidized bed stationary state is set
Meter theory points out that circulating fluidized bed boiler lower part is the bubbling bed based on coarse granule, and top is the fast bed based on fine grained, no
Different best bubbling beds and best fast bed state are corresponded to coal, best fine grained bed storage is according to " recirculating fluidized bed
Fluidised form designs map " optimization determination.Coarse granule concentration is high, it is ensured that bed temperature is stable, guarantees that bulky grain is burnt in fuel；Simultaneously
Will cause heating surface wear aggravation, fan energy consumption increase, Secondary Air penetrate diffusivity reduction, theoretically exist one it is optimal
Coarse granule concentration.After fluidised form reconstruct, the coarse granule amount for constituting bubbling bed is optimal, and the amounts of fine particles for constituting fast bed is increased slightly,
So that Secondary Air penetrates depth, bed material lift power is small, bulky grain elutriation is few, desulfuration in furnace is high-efficient, NOx raw emissions reduce, from
And efficiency of combustion is improved, fluidized air blower pressure head is reduced, reduces combustion chamber abrasion, reduces flue gas pollutant.Thus fine grained, thick
It is vital that grain ratio and the dynamic ownership stabilization in boiler, which meet design requirement,.
The realization rate of " fluidised form reconstruct " is by research efficient cyclone separator, optimization chamber structure, improves material returning device
Equal components, and reduce to coal particle size, it separates the flying dust in flue gas to greatest extent, is transmitted back to burner hearth, constantly participate in
Circulation, grey granularity become thinner, improve circulating ash quantity and the concentration of furnace ash, circulating fluidized bed boiler can achieve very at present
High Matter Transfer multiplying power (ratio of circulating ash quantity and coal-supplying amount).
Recirculating fluidized bed is to go out (bottom ash and flying dust) system one into (to coal) two, and the balance of ash quantity must be kept in operation.It is high
Circulation fluidized-bed combustion boiler is corresponding to flow by the accumulation run steadily in the long term under the action of material circulating system
It is the bubbling bed state that granularity attenuates that change state can carry that be converted to top be fine grain fast bed lower part secretly from bubbling bed elutriation.
Fast bed is formed by since the difference of wind speed, average particle size, solid circulating rate also has different fast bed states.To any one
For platform circulating fluidized bed boiler, there is its material design of specifically burning coal-fired, that is to say, that basis when boiler design
It designs coal-fired calorific value, ash content, ash formation etc. and has selected solid circulating rate, solid circulating rate (the concentration of furnace ash) is when operation
No to reach design requirement, the correctness that grey balance is established, can directly influence circulating fluidized bed boiler by the normal fortune of design
Row.When operating in optimal operational condition, efficiency of combustion, station service power consumption rate, the comprehensive performances such as abrasion, desulphurization denitration will reach in furnace
To optimal.
To pursue more preferably performance, boiler combustion, heat transfer, low nitrogen burning, desulfurization etc. come all in accordance with higher circulating ash quantity
Design, by making great efforts the performance of the components such as raising cyclone separator, material returning device and air distribution plate, even if using more low-ash fuel
Also it is able to satisfy the demand compared with high circulation multiplying power.Cyclone separator is the critical component of the Circulating Fluidized Bed Ash circulatory system, and gas is consolidated
Separative efficiency determines recirculating fluidized bed circulating ratio, to determine that circulating fluidized bed boiler is operated normally by design point.
Its solid circulating rate can only be a kind of specific state after boiler design, and the Cyclone Performance of boiler is also opposite
It determines, operation can achieve optimal state under design conditions；But in the case where the variation such as coal, boiler load, pot
Furnace material balance does not adjust means effectively.In practical applications, the high-effect circulating fluidized bed boiler of careful design occurs
Coal adaptability is poor, load adjustment performance bad problem.Lose coal for circulation fluid bed boiler kind wide adaptability, load tune
The wide advantage of adjusting range.
In addition, the ash content of different types of coal, ash formation are widely different, existing boiler both for specific coal variety into
Row design, when a boiler uses ash content coal of coal-fired, ash formation difference more coal-fired than design lower than design, so that material
Circulating ratio is low, solid circulating rate is few, and boiler furnace ash concentration is difficult to reach design and operation state；It is higher than design when using ash content
When fuel, ash formation are better than the fire coal for designing fuel, so that Matter Transfer multiplying power, the concentration of furnace ash constantly increase, to keep
Solid circulating rate is designed, then needs constantly to put ash.
It is grey well below containing for furnace fire coal is entered with the flying dust amount of flue gas escape since the separative efficiency of cyclone separator is very high
Amount needs to keep boiler ash quantity balance by putting lime-ash.Usually there are two types of ash discharge approach, but there is certain drawback:
1, ash is put by material returning device: needs high temperature ash cooling special equipment, fine ash transportation system, equipment is complicated；And it puts
Ash quantity is difficult to control, and Yi Yinqi circulating ash returning charge is unsmooth, and circulation is unstable, influences boiler even running, associated specialist is not advocated
Using.
2, it increases bottom ash discharge amount: with the raising of the Effiency of whirlwind Separator, adjusting boiler using bottom ash discharge
Grey balance needs to increase discharge amount, and large granular materials are quickly discharged, and lower furnace portion bubbling bed characteristic reduction, bed temperature stability becomes
Difference；The bulky grain fired coal combustion time is greatly shortened, and increases boiler heat loss of imperfect solid combustion q4；Fine grain circulating ash
With the bottom ash mixing of bulky grain, it is unfavorable for slagging tap, convey and utilizing, Dust Improvement difficulty is big, and environmental issue is prominent.
In addition, the actual load of boiler is also dynamic change, same boiler works in different load, coal-supplying amount,
Cigarette air quantity and flow velocity etc. require to adjust accordingly, to meet the normal operation of boiler.In addition the variation of cigarette air quantity and flow velocity
Influence to boiler circulating ash quantity and the concentration of furnace ash is difficult to demands such as boiler combustion, heat transfer, low nitrogen burning control, desulfurization
It is synchronous to adapt to, and lack corresponding adjustment means, thus the boiler performance under influencing different load.
Utility model content
In order to overcome disadvantages mentioned above of the existing technology, the utility model aim is to propose a kind of circulating fluidized bed boiler
Circulating ratio and grey balance regulator control system, it is on the basis of prior art circulating fluidized bed boiler, separative efficiency is relatively fixed
Cyclone separator be changed into adjustable cyclone separator, can be according to boiler operating state (propellant composition, coal-feeding mode, pot
Furnace load, low nitrogen burning, desulfuration in furnace, vapor (steam) temperature and pressure etc.) carry out dynamic regulation；In addition, addition is adopted in control system
Collect module and control module, can monitor in real time, meets boiler in different types of coal, different load operating condition down regulation boiler circulation times
The requirement of rate and grey balance, the coal adaptability for effectively solving the high-effect circulating fluidized bed boiler appearance of careful design is poor, bears
The bad problem of lotus tuning performance；Circulating fluidized bed boiler circulating ratio and grey balance regulate and control method, according to acquisition module data
The air output of source dynamic regulation work spray gun quantity, spray gun, controls the separative efficiency of cyclone separator, so as to adjust following in boiler
Ring multiplying power and grey balance, so that the high-effect circulating fluidized bed boiler of careful design equally has, suitability of fuel is wide, load tune
The strong advantage of whole ability.
The technical solution adopted by the utility model to solve its technical problems is that:
A kind of circulating fluidized bed boiler circulating ratio and grey balance regulator control system, including circulating fluidized bed boiler, control are single
Member, the circulating fluidized bed boiler include burner hearth, cyclone separator, dipleg, material returning device, connection flue, tail vertical well, burner hearth
It is connect with cyclone separator, cyclone separator upper end is connect by connecting flue with tail vertical well, and cyclone separator lower end passes through
Dipleg is connect with material returning device upper end, and material returning device lower end is connect with lower furnace portion, and the cyclone separator is equipped with will be in hot air pipe
Hot wind be transported to the gas spray gun in cyclone separator, gas pressure signal acquisition mould is equipped in the circulating fluidized bed boiler
Block, the gas pressure signal acquisition module are connect with control unit.
The gas pressure signal acquisition module includes pressure sensor A, pressure sensor B, pressure sensor C and pressure
Force snesor D, pressure sensor A are installed on the lower part of circulating fluidized bed boiler, above bubbling bed, and pressure sensor B is installed on
Furnace outlet, pressure sensor C are installed on the entrance of inlet flue duct of cyclone separator, and pressure sensor D is installed on cyclonic separation
Device and the connection outlet for connecting flue.
Described control unit includes differential pressure arithmetic unit, resistance arithmetic unit, the pressure sensor A, pressure sensor B with
The connection of differential pressure arithmetic unit, the pressure sensor C, pressure sensor D are connect with resistance arithmetic unit.
The spray gun be equipped with it is multiple, multiple spray guns respectively with the shell portion of cyclone separator and/or cone
Part connects, and height and position of the multiple spray guns on cyclone separator is layered setting.
The spray gun includes blast pipe, volume damper, nozzle, and volume damper one end is connect with nozzle, and air quantity is adjusted
The valve other end is connect with blast pipe, and the volume damper is connect with control unit.
The spray tip installation direction is perhaps inversely arranged or local using forward arranging with inner cyclone air-flow
Forward perhaps vertical direction arranges or is in set angle arrangement for arrangement, local back arrangement.
The jet nozzle air flow is using interruption injection or continuous spray regime.
The interruption spray regime is sprayed using pulsed, and continuous spray regime is using linear type, sinusoidal curve etc..
The electric control valve, solenoid valve, pneumatic control valve of electrical control can be used in the volume damper, or manually
Regulating valve.
Circulating fluidized bed boiler circulating ratio and grey balance regulator control system can be realized by control unit to be automatically controlled,
Regulating valve can be adjusted by operations staff, realize manual control.
The beneficial effects of the utility model are:
1. circulating fluidized bed boiler circulating ratio and grey balance regulator control system be on the basis of current circulating fluidized bed boiler,
By installing spray gun additional on cyclone separator, the relatively-stationary cyclone separator of separative efficiency is changed into adjustable cyclonic separation
Device can carry out dynamic regulation according to the operating status of boiler, expand the coal-fired scope of application, the Load Regulation ability of boiler, excellent
Change boiler operating parameter, improves low nitrogen burning, desulfuration in furnace effect etc.；Acquisition module and control module are added in control unit,
It can monitor in real time, meet boiler in the requirement of different types of coal different load operating condition down regulation boiler circulating ratio and grey balance,
Effectively solve that the coal adaptability that the high-effect circulating fluidized bed boiler of careful design occurs is poor, and load adjustment performance is bad etc. asks
Topic.
2. spray gun is equipped with multiple, multiple spray guns connect with the shell portion of cyclone separator or conical section respectively
It connects, height and position of the multiple spray guns on cyclone separator is layered setting.Circulating fluidized bed boiler circulating ratio and ash
Spray gun at least one group in balance regulation system, every group of setting at least one spray gun, spray gun are installed on the cylinder of cyclone separator
Or in cone, every group of spray gun is installed in the plane of different height, and the spray gun number of plies, number and arranged direction can be according to different rotations
Wind cyclone separator arrangement carries out different arrangements, and this arrangement has fully considered the design and work characteristics of cyclone separator, spirit
It is living autonomous；Spray gun disturbs gas-solid mobilization dynamic field to hot-air is sprayed into cyclone separator cylinder and/or cone at a high speed, influences
Its gas solid separation, and so that the dust fine grained isolated is carried out secondary spread, while hot-air mends the regional dust fine grained
Oxygen carries out overheavy firing, and reducing escape dust phosphorus content does not reduce boiler combustion efficiency while reducing boiler circulating ratio,
More energy-saving and environmental protection.
3. circulating fluidized bed boiler circulating ratio and grey balance regulator control system are using pressure sensor to positions different in boiler
The pressure signal set is acquired, and this method arrangement is simple, and measurement is reliable, and acquisition precision is high.
4. circulating fluidized bed boiler circulating ratio and grey balance regulate and control method, by the pressure signal of acquisition by calculating conversion
It is compared for burner hearth differential pressure, cyclone separator resistance with predetermined threshold, the air-supply of dynamic regulation work spray gun quantity, spray gun
Amount, controls the separative efficiency of cyclone separator, so as to adjust boiler circulating ratio and grey balance, so that careful design is high-effect
Circulating fluidized bed boiler equally has the advantages that suitability of fuel is wide, load adjustment ability is strong；And in different types of coal, different load
Etc. there are under operating conditions optimizing regulation means, targetedly regulate and control circulating ratio and grey balance state, obtained under off-design behaviour
Obtain preferable boiler operation performance.
It is automatically controlled 5. circulating fluidized bed boiler circulating ratio and grey balance regulator control system can be realized by control unit,
Regulating valve can also be adjusted by operations staff, realize manual control.
6. circulating fluidized bed boiler circulating ratio and grey balance regulator control system can be by adjusting cyclone separator separation effect
Rate, it is appropriate to increase boiler fly ash amount and particle size of fly ash, mitigate or prevent boiler tail vertical shaft fouling of heating surface.
Detailed description of the invention
Fig. 1 is a kind of circulating fluidized bed boiler circulating ratio and grey balance regulator control system schematic diagram；
Fig. 2 is spray gun structure schematic diagram.
In figure, 1- circulating fluidized bed boiler；11- burner hearth；12- cyclone separator；121- inlet flue duct；122- cylinder；
123- cone；13- dipleg；14- material returning device；15- connection flue；16- tail vertical well；2- spray gun；21- air hose；22- regulating valve；
23- nozzle；31- pressure sensor A；32- pressure sensor B；33- pressure sensor C；34- pressure sensor D.
Specific embodiment
In order to make those skilled in the art more fully understand the technical solution in the utility model, below in conjunction with this reality
With the attached drawing in new embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that
The described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.
As shown in Figure 1, a kind of circulating fluidized bed boiler circulating ratio and grey balance regulator control system, including recirculating fluidized bed pot
Furnace 1, control unit, the circulating fluidized bed boiler 1 include burner hearth 11, cyclone separator 12, dipleg 13, material returning device 14, connect
Cigarette receiving road 15, tail vertical well 16, burner hearth 11 are connect by inlet flue duct 121 with cyclone separator 12,12 upper end of cyclone separator
It being connect by connection flue 15 with tail vertical well 16,12 lower end of cyclone separator is connect by dipleg 13 with 14 upper end of material returning device,
14 lower end of material returning device is connect with 11 lower part of burner hearth；The spray gun 2 is installed on the cyclone separator 12 of circulating fluidized bed boiler 1
On, the control module is connect with spray gun 2.The cyclone separator 12, which is equipped with, is transported to whirlwind for the hot wind in hot air pipe
Gas spray gun 2 in separator, the circulating fluidized bed boiler is interior to be equipped with gas pressure signal acquisition module, the gas pressure
Force signal acquisition module is connect with control unit.
Circulating fluidized bed boiler circulating ratio and grey balance regulator control system on the basis of current circulating fluidized bed boiler 1,
By installing spray gun 2 additional on cyclone separator 12, the relatively-stationary cyclone separator of separative efficiency is changed into adjustable whirlwind
Separator 12 can carry out dynamic regulation according to boiler operatiopn operating condition, expand the coal-fired scope of application, the Load Regulation energy of boiler
Power optimizes boiler operating parameter, improves low nitrogen burning, desulfuration in furnace effect etc.；Acquisition module and control are added in regulator control system
Module can monitor in real time, meet boiler in the operating conditions such as different types of coal different load down regulation boiler circulating ratio and grey balance
Requirement, effectively solve careful design high-effect circulating fluidized bed boiler occur coal adaptability it is poor, load adjustment performance
The problems such as bad.
The gas pressure signal acquisition module includes pressure sensor A31, pressure sensor B32, pressure sensor
C33 and pressure sensor D34, pressure sensor A31 are installed on the lower part of the burner hearth 11 of circulating fluidized bed boiler 1 (on bubbling bed
Face), pressure sensor B32 is installed on the outlet of burner hearth 11, and pressure sensor C33 is installed on 12 inlet flue duct 121 of cyclone separator
Entrance, pressure sensor D34 be installed on cyclone separator with connect the connection outlet of flue 15；Circulating fluidized bed boiler circulation
Multiplying power and grey balance regulator control system are acquired the pressure of different location in boiler using pressure sensor, gas pressure sensing
Device arrangement is simple, and measurement is reliable, and precision is high.
Described control unit includes differential pressure arithmetic unit, resistance arithmetic unit, the pressure sensor A31, pressure sensor
B32 is connect with differential pressure arithmetic unit, and the pressure sensor C33, pressure sensor D34 are connect with resistance arithmetic unit.
2 at least one group of spray gun, every group of setting at least one spray gun, spray gun 2 are installed on cyclone separator 12
On cylinder 122 or cone 123, every group of spray gun 2 is installed on same level, and spray gun 2 includes air hose 21, regulating valve 22, nozzle 23,
22 one end of regulating valve is connect with nozzle 23, and 22 other end of regulating valve is connect with air hose 21, the regulating valve 22 and control unit
Connection.
23 installation direction of spray tip is used and is forward arranged with inner cyclone air-flow, or reverse arrangement, Huo Zheju
Portion forward arranges, local back arrangement perhaps arrange or in set angle arrangement by vertical direction.
The volume damper 22 uses electric control valve, solenoid valve, the pneumatic control valve of electrical control, or manually
Regulating valve.
Certainly the spray gun in each group using a total regulating valve carry out air quantity and adjust be also it is feasible, it is also practical newly at this
Within the protection scope of type.
2 at least one group of spray gun in circulating fluidized bed boiler circulating ratio and grey balance regulator control system, every group of setting is at least
One spray gun 2, spray gun 2 are installed on the cylinder 122 or cone 123 of cyclone separator 12, the spray gun number of plies, number and arranged direction
Different arrangements can be carried out according to different cyclone separator structures, this arrangement has fully considered setting for cyclone separator 12
Meter and work characteristics, spray gun 2 disturb gas-solid mobilization dynamic to hot-air is sprayed into cyclone separator cylinder and/or cone at a high speed
, its gas solid separation is influenced, and so that the dust fine grained isolated is carried out secondary spread, while hot-air is thin to the regional dust
Particle oxygenating carries out overheavy firing, reduces escape dust phosphorus content, while reducing boiler circulating ratio, does not reduce boiler combustion
Burn efficiency, more energy-saving and environmental protection.
On the basis of prior art circulating fluidized bed boiler, the spray gun can also be only installed, by operations staff according to pot
Furnace operating condition manually adjusts regulating valve, regulates and controls the Effiency of whirlwind Separator, to regulate and control circulating fluidized bed boiler circulation times
Rate and grey balance.
When the utility model is used, fine granular materials (such as coal, coke, lime-ash) are under cigarette wind airflow function in burner hearth
It burns and moves upwards in 11, cloud of dust gas is taken in air-flow from the outlet of boiler furnace 11 and enters 12 inlet flue duct 121 of cyclone separator
Accelerated, since inlet flue duct 121 and 122 part of cylinder are tangentially to enter relationship, high speed, high energy air-flow take the entrance of cloud of dust gas
Cylinder 122 along inner wall rotate, formed whirlwind, under centrifugal force and gravity, dust particles along flow of flue gas direction to barrel,
Downward spiral is mobile, glides along 123 inner wall of cone, and into dipleg 13, the material that separator separates is entered by dipleg 13
Material returning device 14 flows through material returning device 14 under the action of fluidized wind, sends burner hearth 11 back to by returning charge inclined tube；Meanwhile separation in cylinder
More clean flue gas afterwards flows upwardly into connection flue 15, boiler tail vertical shaft 16, is discharged into atmosphere through further purifying；Gas pressure
Pressure sensor A31, pressure sensor B32 in force signal acquisition module acquire pressure value, and pressure value is transferred to differential pressure
In calculator, calculated result is compared by differential pressure calculator with the burner hearth differential pressure threshold value of setting；Gas pressure signal acquisition mould
Pressure sensor C33, pressure sensor D34 in block acquire pressure value, and pressure value are transferred in resistance arithmetic unit, resistance
Calculated result is compared by calculator with the cyclone separator resistance threshold value of setting；When differential pressure calculator result is more than or equal to furnace
When thorax differential pressure sets upper limit threshold and drag evaluation device result is more than or equal to cyclone separator setting upper limit resistance threshold value, control is single
Member controls the corresponding unlatching of regulating valve 22 in order and aperture, air-flow enter cyclone separator through air hose and nozzle；When differential pressure calculates
Device result is less than or equal to burner hearth differential pressure given threshold or drag evaluation device result is less than or equal to cyclone separator Resistance Setting threshold value
When, control unit turns down or closes corresponding regulating valve 22 in order, weakens the air-flow into cyclone separator；When differential pressure calculates
Device be less than burner hearth differential pressure setting lower threshold and or drag evaluation device result be less than cyclone separator Resistance Setting lower threshold when,
Control unit closes all regulating valves 22.
The control unit is to regulating valve using continuous opening and closing, pulsed opening and closing, discontinuous opening and closing or sinusoidal curve formula
Open and close control.
Circulating fluidized bed boiler circulating ratio and grey balance regulate and control method, convert the pressure signal of acquisition to by calculating
Burner hearth differential pressure, cyclone separator resistance are compared with predetermined threshold, the air output of dynamic regulation work spray gun quantity, spray gun,
The separative efficiency for controlling cyclone separator, so as to adjust boiler circulating ratio and grey balance, so that the high-effect of careful design follows
Circulation fluidized bed boiler equally has the advantages that suitability of fuel is wide, load adjustment ability is strong；And in different types of coal, different load etc.
There are optimizing regulation means under operating condition, targetedly regulate and control circulating ratio and grey balance state, obtained under off-design behaviour
Preferable efficiency of combustion, state modulator, low nitrogen burning, desulfuration in furnace and other effects.
Circulating fluidized bed boiler circulating ratio and grey balance regulator control system can be realized by control unit to be automatically controlled,
Regulating valve can be adjusted by operations staff, realize manual control.
Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The range of the utility model protection all should belong in every other embodiment obtained.
Claims (7)
1. a kind of circulating fluidized bed boiler circulating ratio and grey balance regulator control system, including circulating fluidized bed boiler, control unit,
It is characterized in that, the circulating fluidized bed boiler includes burner hearth, cyclone separator, dipleg, material returning device, connection flue, tail portion
Vertical shaft, burner hearth are connect with cyclone separator, and cyclone separator upper end is connect by connecting flue with tail vertical well, cyclone separator
Lower end is connect by dipleg with material returning device upper end, and material returning device lower end is connect with lower furnace portion, and the cyclone separator is equipped with will
Hot wind in hot air pipe is transported to the gas spray gun in cyclone separator, is equipped with gas pressure in the circulating fluidized bed boiler and believes
Number acquisition module, the gas pressure signal acquisition module are connect with control unit.
2. a kind of circulating fluidized bed boiler circulating ratio as described in claim 1 and grey balance regulator control system, which is characterized in that
The gas pressure signal acquisition module includes pressure sensor A, pressure sensor B, pressure sensor C and pressure sensor
D, pressure sensor A are installed on the lower part of the burner hearth of circulating fluidized bed boiler, above bubbling bed, and pressure sensor B is installed on furnace
Thorax outlet, pressure sensor C are installed on the entrance of inlet flue duct of cyclone separator, and pressure sensor D is installed on cyclone separator
With the connection outlet for connecting flue.
3. a kind of circulating fluidized bed boiler circulating ratio as claimed in claim 2 and grey balance regulator control system, which is characterized in that
Described control unit includes differential pressure arithmetic unit, resistance arithmetic unit, the pressure sensor A, pressure sensor B and differential pressure operation
Device connection, the pressure sensor C, pressure sensor D are connect with resistance arithmetic unit.
4. a kind of circulating fluidized bed boiler circulating ratio as described in claim 1 and grey balance regulator control system, which is characterized in that
The spray gun be equipped with it is multiple, multiple spray guns are connect with the shell portion of cyclone separator and/or conical section respectively,
Height and position of the multiple spray guns on cyclone separator is layered setting.
5. a kind of circulating fluidized bed boiler circulating ratio as described in claim 1 and grey balance regulator control system, which is characterized in that
The spray gun includes blast pipe, volume damper, nozzle, and volume damper one end is connect with nozzle, the volume damper other end
It is connect with blast pipe, the volume damper is connect with control unit.
6. a kind of circulating fluidized bed boiler circulating ratio as claimed in claim 5 and grey balance regulator control system, which is characterized in that
The spray tip installation direction using forward being arranged with inner cyclone air-flow, perhaps inversely arrangement or part forward arrangement,
Local back arrangement perhaps arrange or be in set angle arrangement by vertical direction.
7. a kind of circulating fluidized bed boiler circulating ratio as claimed in claim 5 and grey balance regulator control system, which is characterized in that
The volume damper uses electric control valve, solenoid valve, the pneumatic control valve of electrical control.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679603A (en) * | 2018-08-31 | 2018-10-19 | 刘学冰 | A kind of circulating fluidized bed boiler circulating ratio and grey balance regulator control system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679603A (en) * | 2018-08-31 | 2018-10-19 | 刘学冰 | A kind of circulating fluidized bed boiler circulating ratio and grey balance regulator control system and method |
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