CN207951100U - Properties of CFB kiln gas discharges running optimizatin cost calculating system - Google Patents
Properties of CFB kiln gas discharges running optimizatin cost calculating system Download PDFInfo
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- CN207951100U CN207951100U CN201721582880.3U CN201721582880U CN207951100U CN 207951100 U CN207951100 U CN 207951100U CN 201721582880 U CN201721582880 U CN 201721582880U CN 207951100 U CN207951100 U CN 207951100U
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Abstract
The utility model provides a kind of Properties of CFB kiln gas discharge running optimizatin cost calculating system, including：Feeder, air volume meter, coal sulfur content analyzer, lime stone batcher, nitrogen oxides measuring instrument, flowmeter, I/O modules, programmable logic controller (PLC) and host computer；Feeder, air volume meter, coal sulfur content analyzer, lime stone batcher, nitrogen oxides measuring instrument and flowmeter carry out 3G/GPRS communications with I/O modules and connect respectively；I/O modules carry out communication with programmable logic controller (PLC) by I/O buses and connect, and communication connection is carried out by Industrial Ethernet between programmable logic controller (PLC) and host computer.Due to considering lime stone cost needed for desulfuration in furnace, desulfurization heat loss cost, wet desulphurization cost, denitration cost, comprehensive power consumption cost, to which the reliability of the system is high, operation and maintenance are simple, overall cost calculates accurately, and desulfurization overall cost inside and outside stove is reduced, realize flue gas emission running optimizatin.
Description
Technical field
The utility model is related to power station unit desulfurization economic analysis fields, more particularly, to a kind of recirculating fluidized bed
Unit furnace flue gas emission running optimizatin cost calculating system.
Background technology
Recirculating fluidized bed (Circulating Fluidized Bed, CFB) combustion technology is because of fuel tolerance adaptability
The advantages such as extensively, pollution emission control is at low cost, quickly grow in recent years.By 2016, total throwing of China's CFB boiler unit
About 100,000,000 kilowatts of capacity is transported, 12% or more of thermoelectricity installation total amount is accounted for.The coal in current China 50% or so is used to generate electricity, this
Proportion need to be increased to 60% or more to the year two thousand twenty.Environmental Protection Department proposes, it is dense to create Thermal generation unit Air Pollutant Emission
Degree needs to reach gas turbine group concentration of emission limit value, i.e. flue dust, sulfur dioxide, discharged nitrous oxides concentration is respectively no higher than
10、35、50mg/m3Requirement.State Bureau of Environmental Protection is also increasingly harsh to the Air Pollutant Emission Index of existing operating unit, power plant
Personnel need to consider SO in operation controls2And NOxDischarge, to operating parameter adjust, cause the economic benefit of unit to be dropped
It is low.
Domestic many CFB boiler desulfuration efficiencies only rest on 80% or so, if to reach higher desulfuration efficiency, need
Increase desulfurizing agent, more generally needs to increase flue gas desulfurization device in tail portion.And in stove external desulfurzation mechanism and effect
It differs greatly, or even has certain coupling with denitrification process.
Utility model content
The utility model provides a kind of recirculating fluidized bed for overcoming the above problem or solving the above problems at least partly
Unit furnace flue gas emission running optimizatin cost calculating system.
The system includes：Feeder, air volume meter, coal sulfur content analyzer, lime stone batcher, nitrogen oxides measure
Instrument, flowmeter, I/O modules, programmable logic controller (PLC) and host computer；
Feeder, air volume meter, coal sulfur content analyzer, lime stone batcher, nitrogen oxides measuring instrument and flow score
3G/GPRS communications are not carried out with I/O modules to connect；I/O modules carry out communication company by I/O buses and programmable logic controller (PLC)
It connects, communication connection is carried out by Industrial Ethernet between programmable logic controller (PLC) and host computer；
The circuit board of I/O modules includes Switching Power Supply, DC power supply conversion, I/O plates and conditioning plate, Switching Power Supply, straight
The conversion of galvanic electricity source, I/O plates and conditioning plate are encapsulated in aluminum hull.
Wherein, electronic weighing device is housed in feeder, weighing sensor, velocity pick-up are equipped in electronic weighing device
Device, integrator computing unit and communication module；
Weighing sensor, velocity sensor are connect with integrator computing unit respectively, and integrator computing unit is connect with communication module, are led to
It interrogates module and carries out 3G/GPRS communication connections with I/O modules.
Wherein, there is digital weighing device equipped with built-in in lime stone batcher, be equipped with and weigh in digital weighing device
Sensor, velocity sensor, weighing controller, integrator computing unit and communication module；Weighing sensor, velocity sensor respectively with
Weighing controller connects, and weighing controller connect with integrator computing unit, and integrator computing unit is connect with communication module, communication module and
I/O modules carry out 3G/GPRS communication connections.
Wherein, it is respectively provided with communication mould in air volume meter, coal sulfur content analyzer, nitrogen oxides measuring instrument and flowmeter
Block；Air volume meter, coal sulfur content analyzer, nitrogen oxides measuring instrument and flowmeter pass through the respectively internal communication mould being equipped with respectively
Block carries out 3G/GPRS communications with I/O modules and connects.
Wherein, programmable logic controller (PLC) includes host CPU, AD converter, algorithm memory, PID regulator and I/O logical
Interrogate controller；AD converter, algorithm memory and PID regulator are connect with host CPU respectively；I/O communication controllers and AD conversion
Device connects, and I/O communication controllers carry out communication with I/O modules by I/O buses and connect.
Wherein, I/O communication controllers enter total wind of burner hearth for receiving the coal-supplying amount, unit interval that I/O modules send
Amount, the sulfur mass fraction in coal, circulating fluidized bed boiler export NO and NO2Mass flow, lime stone feeding coal and cigarette
Throughput；AD converter, the signal for receiving I/O communication controllers are converted into digital signal, and by PID regulator
Digital signal is handled；Host CPU, for reading in the wet desulphurization Properties of CFB stove stored in algorithm memory
The overall cost computational algorithm of outer desulfurization, and according to overall cost computational algorithm to PID regulator treated digital signal into
Row calculates, and obtains desulfurization overall cost；
Wherein, overall cost computational algorithm includes that lime stone cost calculation in stove, the cost calculation of desulfurization heat loss, wet method are de-
Sulphur cost calculation, denitration cost calculation and comprehensive power consumption cost calculate.
Wherein, programmable logic controller (PLC) further includes the SMS module being connect with host CPU, and SMS module passes through wireless telecommunications
Network connection is to mobile terminal or host computer；SMS module, for carrying out telephone call, SMS alarm and ipc monitor circle
It alarms in face.
Wherein, host computer includes at least one of following equipment equipment；Following equipment include operator station, history station,
Tab stops, computer installation, engineer station, printer, journal printer, large screen；Host computer, for showing wet desulphurization recycle stream
Change the desulfurization overall cost inside and outside bed unit furnace.
The advantageous effect brought of technical solution that the application proposes is：
By being integrated to the collected data of various components, to calculate overall cost.Due to considering desulfuration in furnace
Required lime stone cost, desulfurization heat loss cost, wet desulphurization cost, denitration cost, comprehensive power consumption cost, to the system
Reliability it is high, operation and maintenance are simple, overall cost calculates accurate and reduces desulfurization overall cost inside and outside stove, realize flue gas row
Running optimizatin is put, the economy of unit is improved.
Furthermore it is also possible to solve the problems, such as desulfurization ratio reasonable distribution inside and outside stove, make the Air Pollutants Emissions of CFB units
It reduces, economic benefit enhances with competitiveness, and is conducive to establish CFB unit atmosphere pollution running optimizatin technology paths, guidance
The inside and outside sulphur distribution ratio example of best stove and parameter curve in unit running process, while being set for newly-built CFB units tail portion desulfurization
Standby type selecting provides foundation.
Description of the drawings
Fig. 1 is to discharge running optimizatin cost meter according to a kind of Properties of CFB kiln gas of the utility model embodiment
Calculate system structure diagram；
Fig. 2 is to discharge running optimizatin cost meter according to a kind of Properties of CFB kiln gas of the utility model embodiment
Calculate system structure diagram；
Fig. 3 is a kind of feeder structural schematic diagram according to the utility model embodiment；
Fig. 4 is a kind of lime stone batcher structural schematic diagram according to the utility model embodiment；
Fig. 5 is a kind of programmable logic controller (PLC) structural schematic diagram according to the utility model embodiment；
Fig. 6 is a kind of programmable logic controller (PLC) structural schematic diagram according to the utility model embodiment.
Specific implementation mode
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is not intended to limit the scope of the present invention for illustrating the utility model.
In a specific embodiment, the utility model is described further in conjunction with attached drawing.Referring to Fig. 1, Fig. 1
A kind of Properties of CFB kiln gas discharge running optimizatin cost calculating system is given, which includes：Feeder 1, wind
Gauge 2, nitrogen oxides measuring instrument 4, lime stone batcher 5, flowmeter 6, I/O modules 7, may be programmed coal sulfur content analyzer 3
Logic controller 8 and host computer 9；
Feeder 1, air volume meter 2, coal sulfur content analyzer 3, lime stone batcher 5, nitrogen oxides measuring instrument 4 and flow
Meter 6 carries out 3G/GPRS communications with I/O modules 7 and connects respectively；I/O modules 7 pass through I/O buses and programmable logic controller (PLC) 8
Communication connection is carried out, communication connection is carried out by Industrial Ethernet between programmable logic controller (PLC) 8 and host computer 9.
As a kind of alternative embodiment, air volume meter 2, coal sulfur content analyzer 3, nitrogen oxides measuring instrument 4 and flowmeter 6
Inside it is respectively provided with communication module 22, communication module 23, communication module 24 and communication module 26；Air volume meter 2, coal sulfur content point
Analysis 3, nitrogen oxides measuring instrument 4 and flowmeter 6 carry out 3G/ by the respectively internal communication module being equipped with and I/O modules 7 respectively
GPRS communication connections.
Wherein, the circuit board of I/O modules 7 includes Switching Power Supply, DC power supply conversion, I/O plates and conditioning plate etc., is all sealed
In aluminum hull.By being encapsulated in aluminum hull, electronic interferences not only can be effectively shielded, but also dust and external environment can be protected
Invasion.In addition, I/O modules 7, by pedestal and joint connection in site, the address of module is set by the DIP switch being set on the base.
The system that the utility model embodiment provides, by being integrated to the collected data of various components, to calculate
Overall cost.Due to considering lime stone cost needed for desulfuration in furnace, desulfurization heat loss cost, wet desulphurization cost, denitration
Cost, comprehensive power consumption cost, to which the reliability of the system is high, operation and maintenance are simple, overall cost calculates accurate and reduces stove
Inside and outside desulfurization overall cost realizes flue gas emission running optimizatin, improves economy, the feature of environmental protection of unit.
Furthermore it is also possible to solve the problems, such as desulfurization ratio reasonable distribution inside and outside stove, make the Air Pollutants Emissions of CFB units
It reduces, economic benefit enhances with competitiveness, and is conducive to establish CFB unit atmosphere pollution running optimizatin technology paths, guidance
The inside and outside sulphur distribution ratio example of best stove and parameter curve in unit running process, while being set for newly-built CFB units tail portion desulfurization
Standby type selecting provides foundation.
As shown in figure 3, as a kind of alternative embodiment, electronic weighing device 10, electronic weighing device are housed in feeder 1
Weighing sensor 11, velocity sensor 12, integrator computing unit 13 and communication module 21 are equipped in 10；
Weighing sensor 11, velocity sensor 12 are connect with integrator computing unit 13 respectively, integrator computing unit 13 and communication mould
Block 21 connects, and communication module 21 carries out 3G/GPRS communications with I/O modules 7 and connects.
As shown in figure 4, as a kind of alternative embodiment, digital weighing device 50, number are housed in lime stone batcher 5
Equipped with weighing sensor 51, velocity sensor 52, weighing controller 53, integrator computing unit 54 and communication mould in formula weighing device 50
Block 25；Weighing sensor 51, velocity sensor 52 are connect with weighing controller 53 respectively, weighing controller 53 and integrator computing unit
54 connections, integrator computing unit 54 are connect with communication module 25, and communication module 25 carries out 3G/GPRS communications with I/O modules 7 and connects.
As shown in figure 5, as a kind of alternative embodiment, programmable logic controller (PLC) 8 includes host CPU 81, AD converter
82, algorithm memory 83, PID regulator 84 and I/O communication controllers 20；AD converter 82, algorithm memory 83 and PID are adjusted
Device 84 is connect with host CPU 81 respectively；I/O communication controllers 20 are connect with AD converter 82, and I/O communication controllers 20 pass through I/O
Bus carries out communication with I/O modules 7 and connect.In addition, when the quantity of programmable logic controller (PLC) 8 is two, then I/O is communicated
Controller 20 also there are two.Correspondingly, Properties of CFB kiln gas provided by the utility model discharges running optimizatin cost
Computing system can refer to Fig. 2.
As a kind of alternative embodiment, I/O communication controllers 20, for receiving coal-supplying amount, the unit that I/O modules 7 are sent
Time enters sulfur mass fraction in the total blast volume of burner hearth, coal, circulating fluidized bed boiler outlet NO and NO2Mass flow,
Lime stone feeding coal and flue gas flow；AD converter 82, the signal for receiving I/O communication controllers 20 are converted into counting
Word signal, and digital signal is handled by PID regulator 84；Host CPU 81 is stored for reading in algorithm memory 83
The overall cost computational algorithm of desulfurization inside and outside wet desulphurization Properties of CFB stove, and according to overall cost computational algorithm pair
Treated that digital signal is calculated for PID regulator 84, obtains desulfurization overall cost；
Wherein, overall cost computational algorithm includes that lime stone cost calculation in stove, the cost calculation of desulfurization heat loss, wet method are de-
Sulphur cost calculation, denitration cost calculation and comprehensive power consumption cost calculate.
As a kind of alternative embodiment, programmable logic controller (PLC) 8 further includes the SMS module being connect with host CPU 81, short
Letter module is connected to mobile terminal or host computer 9 by wireless communication networks；SMS module, for carrying out telephone call, short
Letter alarm and the alarm of ipc monitor interface.
Wherein, host computer 9 includes at least one of following equipment equipment；Following equipment include operator station, history station,
Tab stops, computer installation, engineer station, printer, journal printer, large screen；Host computer 9, for showing that wet desulphurization recycles
Desulfurization overall cost inside and outside fluid bed unit furnace.
Content based on above-described embodiment, in a specific embodiment, in conjunction with attached drawing to the utility model into traveling
Illustrate to one step.A kind of Properties of CFB kiln gas discharge running optimizatin cost calculating system is given referring to Fig. 1, Fig. 1,
The system includes：Feeder 1, air volume meter 2, coal sulfur content analyzer 3, nitrogen oxides measuring instrument 4, lime stone batcher 5, stream
Gauge 6, I/O modules 7, programmable logic controller (PLC) 8 and host computer 9；
Feeder 1, air volume meter 2, coal sulfur content analyzer 3, lime stone batcher 5, nitrogen oxides measuring instrument 4 and flow
Meter 6 carries out 3G/GPRS communications with I/O modules 7 and connects respectively；I/O modules 7 pass through I/O buses and programmable logic controller (PLC) 8
Communication connection is carried out, communication connection is carried out by Industrial Ethernet between programmable logic controller (PLC) 8 and host computer 9.It is programmable
Logic controller 8 constitutes two-node cluster hot backup using redundant PLC, such as S7400 series.
As a kind of alternative embodiment, air volume meter 2, coal sulfur content analyzer 3, nitrogen oxides measuring instrument 4 and flowmeter 6
Inside it is respectively provided with communication module 22, communication module 23, communication module 24 and communication module 26；Air volume meter 2, coal sulfur content point
Analysis 3, nitrogen oxides measuring instrument 4 and flowmeter 6 carry out 3G/ by the respectively internal communication module being equipped with and I/O modules 7 respectively
GPRS communication connections.
Wherein, the circuit board of I/O modules includes Switching Power Supply, DC power supply conversion, I/O plates and conditioning plate etc., is all sealed
In aluminum hull.By being encapsulated in aluminum hull, electronic interferences not only can be effectively shielded, but also dust and external environment can be protected
Invasion.In addition, I/O modules 7, by pedestal and joint connection in site, the address of module is set by the DIP switch being set on the base.
The system that the utility model embodiment provides, by being integrated to the collected data of various components, to calculate
Overall cost.Due to considering lime stone cost needed for desulfuration in furnace, desulfurization heat loss cost, wet desulphurization cost, denitration
Cost, comprehensive power consumption cost, to which the reliability of the system is high, operation and maintenance are simple, overall cost calculates accurate and reduces stove
Inside and outside desulfurization overall cost realizes flue gas emission running optimizatin, improves economy, the feature of environmental protection of unit.
Furthermore it is also possible to solve the problems, such as desulfurization ratio reasonable distribution inside and outside stove, make the Air Pollutants Emissions of CFB units
It reduces, economic benefit enhances with competitiveness, and is conducive to establish CFB unit atmosphere pollution running optimizatin technology paths, guidance
The inside and outside sulphur distribution ratio example of best stove and parameter curve in unit running process, while being set for newly-built CFB units tail portion desulfurization
Standby type selecting provides foundation.
As shown in figure 3, as a kind of alternative embodiment, electronic weighing device 10, electronic weighing device are housed in feeder 1
Weighing sensor 11, velocity sensor 12, integrator computing unit 13 and communication module 21 are equipped in 10.
As shown in figure 4, as a kind of alternative embodiment, equipped with weighing sensor 51, velocity pick-up in lime stone batcher 5
Device 52, weighing controller 53, integrator computing unit 54 and communication module 25；Weighing sensor 51, velocity sensor 52 respectively with title
Weight controller 53 connects, and integrator computing unit 54 is provided on weighing controller 53, and integrator computing unit 54 connects with communication module 25
It connects.
As shown in figure 5, as a kind of alternative embodiment, programmable logic controller (PLC) 8 includes host CPU 81, AD converter
82, algorithm memory 83, PID regulator 84 and I/O communication controllers 20；AD converter 82, algorithm memory 83 and PID are adjusted
Device 84 is connect with host CPU 81 respectively；AD converter 82 is connect with I/O communication controllers 20.
Content based on above-described embodiment, in a specific embodiment, in conjunction with attached drawing to the utility model into traveling
Illustrate to one step.A kind of Properties of CFB kiln gas discharge running optimizatin cost calculating system is given referring to Fig. 1, Fig. 1,
The system includes：Feeder 1, air volume meter 2, coal sulfur content analyzer 3, nitrogen oxides measuring instrument 4, lime stone batcher 5,
Flowmeter 6, I/O modules 7, programmable logic controller (PLC) 8 and host computer 9；
Feeder 1, air volume meter 2, coal sulfur content analyzer 3, lime stone batcher 5, nitrogen oxides measuring instrument 4 and flow
Meter 6 carries out 3G/GPRS communications with I/O modules 7 and connects respectively；I/O modules 7 pass through I/O buses and programmable logic controller (PLC) 8
Communication connection is carried out, communication connection is carried out by Industrial Ethernet between programmable logic controller (PLC) 8 and host computer 9.It is programmable
Logic controller 8 constitutes two-node cluster hot backup using redundant PLC, such as S7400 series.
As a kind of alternative embodiment, air volume meter 2, coal sulfur content analyzer 3, nitrogen oxides measuring instrument 4 and flowmeter 6
Inside it is respectively provided with communication module 22, communication module 23, communication module 24 and communication module 26；Air volume meter 2, coal sulfur content point
Analysis 3, nitrogen oxides measuring instrument 4 and flowmeter 6 carry out 3G/ by the respectively internal communication module being equipped with and I/O modules 7 respectively
GPRS communication connections.
Wherein, the circuit board of I/O modules includes Switching Power Supply, DC power supply conversion, I/O plates and conditioning plate etc., is all sealed
In aluminum hull.By being encapsulated in aluminum hull, electronic interferences not only can be effectively shielded, but also dust and external environment can be protected
Invasion.In addition, I/O modules 7, by pedestal and joint connection in site, the address of module is set by the DIP switch being set on the base.
The system that the utility model embodiment provides, by being integrated to the collected data of various components, to calculate
Overall cost.Due to considering lime stone cost needed for desulfuration in furnace, desulfurization heat loss cost, wet desulphurization cost, denitration
Cost, comprehensive power consumption cost, to which the reliability of the system is high, operation and maintenance are simple, overall cost calculates accurate and reduces stove
Inside and outside desulfurization overall cost realizes flue gas emission running optimizatin, improves economy, the feature of environmental protection of unit.
Furthermore it is also possible to solve the problems, such as desulfurization ratio reasonable distribution inside and outside stove, make the Air Pollutants Emissions of CFB units
It reduces, economic benefit enhances with competitiveness, and is conducive to establish CFB unit atmosphere pollution running optimizatin technology paths, guidance
The inside and outside sulphur distribution ratio example of best stove and parameter curve in unit running process, while being set for newly-built CFB units tail portion desulfurization
Standby type selecting provides foundation.
As shown in figure 3, as a kind of alternative embodiment, electronic weighing device 10, electronic weighing device are housed in feeder 1
Weighing sensor 11, velocity sensor 12, integrator computing unit 13 and communication module 21 are equipped in 10；
Weighing sensor 11, velocity sensor 12 are connect with integrator computing unit 13 respectively, integrator computing unit 13 and communication mould
Block 21 connects.
As shown in figure 4, as a kind of alternative embodiment, equipped with weighing sensor 51, velocity pick-up in lime stone batcher 5
Device 52, weighing controller 53, integrator computing unit 54 and communication module 25；Weighing sensor 51, velocity sensor 52 respectively with title
Weight controller 53 connects, and weighing controller 53 is connect with integrator computing unit 54；It is provided with integrator computing unit on weighing controller 53
54, integrator computing unit 54 is connect with communication module 25.
As shown in fig. 6, as a kind of alternative embodiment, programmable logic controller (PLC) 8 includes host CPU 81, AD converter
82, algorithm memory 83, PID regulator 84, touching 85 and I/O of screen communication controllers 20；AD converter 82, algorithm memory
83, PID regulator 84 and touching screen 85 are connect with host CPU 81 respectively；AD converter 82 is connect with I/O communication controllers 20.
Wherein, host computer 9 includes at least one of following equipment equipment；Following equipment include operator station, history station,
Tab stops, computer installation, engineer station, printer, journal printer, large screen；Host computer 9, for showing that wet desulphurization recycles
Desulfurization overall cost inside and outside fluid bed unit furnace.
Based on the content of above system embodiment, the utility model embodiment additionally provides above-mentioned Properties of CFB stove
The operation principle of flue gas emission running optimizatin cost calculating system, detailed process are as follows：
1, data acquire
1.1) coal-supplying amount
Electronic weighing device 10 is housed on feeder 1, the weighing sensor 11 in electronic weighing device 10 for generate with
The electric signal and velocity sensor 12 that the weight of coal is proportional are used to detect belt speed signal.By electric signal and belt speed
Degree signal is sent into integrator computing unit 13 simultaneously, instantaneous flow and cumulative amount is obtained after integral operation, communication module 21 will be given
Coal amount F (t) data (unit kg/s) are sent in I/O modules 7.
1.2) total blast volume
2 real-time cooling water of units of measurement time of air volume meter enters the total blast volume q of burner hearthv(unit m3/ s), and by communication mould thereon
Total blast volume data are sent in I/O modules 7 by block 22.
1.3) sulfur content in coal mass fraction
The sulfur mass fraction w being sent into the coal of CFB boiler is measured using coal sulfur content analyzer 3s(unit %),
And sulfur content in coal mass fraction data are sent in I/O modules 7 by communication module 23 thereon.
1.4) NO and NO2Mass flow
Nitrogen oxides measuring instrument 4 measures circulating fluidized bed boiler and exports NO and NO in real time2Mass flow mNO、It is (single
Position is mg/s), and by communication module 24 thereon by boiler export NO and NO2Mass flow data be sent to I/O modules 7.
1.5) lime stone feeding coal
Weighing sensor 51 is housed, weighing sensor 51 generates proportional to the quality of lime stone on lime stone batcher 5
Electric signal, velocity sensor 52 can detect the speed of belt, the two signals are sent into weighing controller 53 simultaneously, through claiming
Integrator computing unit 54 in weight controller 53 obtains instantaneous flow and cumulative amount, lime stone feeding coal F1 after carrying out integral operation
(t) data (unit kg/s) are sent to I/O modules 7 by communication module 25.
1.6) flue gas flow
Flowmeter 6 measures flue gas flow Q in real timeg(unit m3/ s), and by communication module 26 thereon by flue gas flow number
According to being sent to I/O modules 7.
2, data processing and calculating
I/O communication controllers 20 on programmable logic controller (PLC) 8 receive the coal-supplying amount that I/O modules 7 send, total blast volume,
Sulfur content in coal mass fraction, lime stone feeding coal, NO and NO2Mass flow, flue gas flow data.Data are through AD converter 82
It is converted into digital signal, then after the processing of PID regulator 84, host CPU 81 reads the wet desulphurization stored in algorithm memory 83
Desulfurization overall cost computational algorithm inside and outside Properties of CFB stove calculates desulfurization overall cost.Wherein, overall cost, which calculates, calculates
Method includes lime stone cost calculation in stove, the cost calculation of desulfurization heat loss, wet desulphurization cost calculation, denitration cost calculation, comprehensive
Power consumption cost is closed to calculate.
CFB boiler desulfurization is divided into desulfuration in furnace and external desulfurzation.When desulfuration in furnace, stored in burner hearth waiting reaction
CaO is defined as active lime stone.On the one hand because of and the SO that is precipitated in fuel2Carry out desulphurization reaction so that active lime stone
Quality gradually decreases, and on the other hand constantly supplements lime stone in burner hearth inlet, generates new active lime stone.Desulfuration in furnace
Chemical reaction is as shown in following formula (1), (2)：
CaCO3=CaO+CO2-1830.6kJ/kg (1)
Wherein, active lime stone model can be derived by following formula (3)：
In above-mentioned (3) formula, mCaFor the quality of active lime stone, unit kg；MCaFor the molal weight of CaO, unit
For kg/mol；McFor CaCO3Molal weight, unit kg/mol；η is contained pure CaCO in lime stone feeding coal3Ratio
Example, it is generally the case that η 0.9；F1(t) it is lime stone feeding coal, unit kg/s；RCaFor the reaction rate of CaO, unit
mol/s。
CaO reaction rates can be indicated by following formula (4)：
In above formula (4), ρCaFor the density of active lime stone, units/kg/m3。For SO in burner hearth2Concentration, unit are
mol/m3。kvFor SO2Reaction rate constant, can be calculated by following formula (5)；
In above formula (5), R is mol gas constant, and numerical value is 8.31J/ (molK)；T is bed temperature, unit K；λ is
Lime stone reactivity coefficient, generally takes 0.035；SgFor lime stone effective ratio area, unit m2/kg。
As T≤1253K, Sg=-38.4T+5.6 × 104；
As T ＞ 1253K, real-time active lime stone amount in unit running process is obtained by following formula (6) update：
In above formula (6), mCa(tk) it is tkThe storage quality of active lime stone in moment bed material.
The calculating process of the lime stone amount of real-time requirement, can be as shown in following formula (7)：
The calculating process of lime stone cost needed for desulfuration in furnace, can be as shown in following formula (8)：
C1=F1(t)J1 (8)
In above formula (8), C1For lime stone cost in stove, unit is member/s；J1For lime stone seed unit price, unit be member/
kg。
SO is generated in stove2Rate G, can be derived by following formula (9)：
In above formula (9), ωsFor sulfur content in coal mass fraction, unit %；ηsFor sulphur conversion ratio；F0It is single for coal-supplying amount
Position is kg/s.
According to mass conservation law, following formula (10) is obtained：
In above formula (10), qvEnter the air quantity of burner hearth, unit m for the unit time3/s；α=1- α ', α ' are to leak out to be
Number；c’SO2For SO in flue gas2Concentration, unit mol/m3；G (t) is that coal enters burner hearth after-combustion generation SO in the unit time2's
Rate, mol/s；Rs(t) it is SO2Reaction rate, unit mol/s.
Correspondingly, furnace outlet SO2The prediction process of concentration can refer to following formula (11)：
The caloric receptivity that calcination reaction occurs for calcium carbonate can refer to following formula (12)：
By desulfuration efficiency ηtl(unit %) is defined as following formula (13)：
Arriving desulfurization heat loss as available from the above equation is：
It is formula (15) that cost (unit is member/s) is lost caused by desulfuration in furnace：
In above formula (15), J2The price of unit calorific value is converted to for coal, unit is kJ/ members.
Wet desulphurization agent operating cost is：
C3=ML·J3 (16)
In above formula (16), C3For wet desulphurization agent operating cost, unit is member/s；J3It is monovalent for wet desulphurization lime stone,
Unit is member/kg.
CaCO3Actual consumption amount can refer to following formula (17)：
In above formula (17), MLFor CaCO3Actual consumption amount, unit kg/s；QgFor flue gas flow, unit m3/s；
wLFor the purity of absorbent, unit %；β is the utilization rate of absorbent, unit %；Ca/S is calcium sulfur ratio.
Denitration cost can refer to following formula (18)：
C4=mN·J4 (18)
In above formula (18), C4For denitration cost, unit is member/s；J4For ammonium hydroxide unit price price, unit is member/mg.
The quality of ammonium hydroxide is needed to can refer to following formula (19)：
In above formula (19), mNTo need the quality of ammonium hydroxide, unit mg/s；mNOAndFor boiler export NO and NO2Matter
Measure flow, unit mg/s；ηNFor the mass fraction of ammonia in ammonium hydroxide, unit %.
Comprehensive power consumption cost can refer to following formula (20)：
C5=Δ WJ5/3600 (20)
In above formula (20), C5For power consumption cost, unit is member/s；Δ W is operation power consumption, and unit is (kwh)/s；J5
For station-service electricity price, unit is member/(kwh).
In CFB unit steady state operations, wind coal proportion is constant, under the premise of coal quality fluctuation less, SO2And NOxOriginal
Beginning production quantity is basically unchanged, and is not difficult to obtain optimal desulphurization denitration operating condition in conjunction with every cost calculation.According to above formula (8),
(15), (16), (18), (20), can be obtained integrated operation cost, and specific calculating process can refer to following formula (21)：
C=C1+C2+C3+C4+C5 (21)
In above formula (21), C is integrated operation cost, and unit is member/s.
In order to which the utility model principle is explained further, illustrate with reference to specific embodiment.
Using 330MW CFB boilers unit as research object, which is single drum, Natural Circulation, circulating fluidized bed combustion
Mode, air-cooled, experiment process is concentrated mainly at full capacity operating mode nearby, by adjusting external desulfurzation ratio in stove, in conjunction with economy
Property analysis calculate overall cost.Desulfuration in furnace mode is to mix scoria limestone particles, the outer tail flue gas wet desulphurization of stove, design to coal
Capacity is 100%.Denitration mode is SNCR denitration.Between at the trial in 100min, as-fired coal sulfur is 1.35%, and coal-supplying amount is
190t/h, at 905 DEG C, major parameter fluctuation is smaller for average bed temperature control, and wherein operating mode 1-6 is operating condition of test, and operating mode 7 is best
Operating mode verification test.Each section cost unit price of model is shown in Table 1-1.
Table 1-1 model each section cost unit prices
Table 1-2 desulphurization denitration compbined test parameters and cost calculation
Pass through table, it is possible to find mixed in stove burn Ca/S be 0.6 when, the unit atmosphere pollution control operation throwing per hour
It is minimum to enter cost, and is in slow ascendant trend with the cost that reduces for burning Ca/S is mixed.Under different units, different operating modes in stove
Some economic indexs are different in desulphurizing ability and model, have different optimal parameters, but these differences are all embodied in mould
In type, as long as experiment process is reasonable, the optimal parameter under each operating mode of unit can be obtained, determine that desulfurization distributes inside and outside stove, improves
The economy of CFB units.
In the power plant design stage, according to boiler design parameter at full capacity, on above-mentioned optimal desulphurization denitration operating condition basis
On, consider the construction of desulphurization denitration tower and O＆M cost, theoretical reference can be provided for power plant desulfurization denitration device type selecting.
Finally, data can be shown.Specifically, programmable logic controller (PLC) 8 will be calculated by Industrial Ethernet and be tied
Fruit is sent to host computer 9.Host computer 9 includes operator station, history station, tabulation/computer installation, engineer station, printer, records and beat
The equipment such as print machine, large screen can show desulfurization overall cost inside and outside wet desulphurization Properties of CFB stove.
Claims (8)
1. a kind of Properties of CFB kiln gas discharges running optimizatin cost calculating system, which is characterized in that the system packet
It includes：Feeder, air volume meter, coal sulfur content analyzer, lime stone batcher, nitrogen oxides measuring instrument, flowmeter, I/O modules,
Programmable logic controller (PLC) and host computer；
The feeder, the air volume meter, the coal sulfur content analyzer, the lime stone batcher, the nitrogen oxides
Measuring instrument and the flowmeter carry out 3G/GPRS communications with I/O modules and connect respectively；The I/O modules pass through I/O buses and institute
State programmable logic controller (PLC) and carry out communication connection, between the programmable logic controller (PLC) and the host computer by industry with
Too net carries out communication connection；
The circuit board of the I/O modules includes Switching Power Supply, DC power supply conversion, I/O plates and conditioning plate, the switch electricity
Source, DC power supply conversion, the I/O plates and the conditioning plate are encapsulated in aluminum hull.
2. system according to claim 1, which is characterized in that electronic weighing device, the electricity are housed in the feeder
Weighing sensor, velocity sensor, integrator computing unit and communication module are equipped in sub- weighing device；
The weighing sensor, the velocity sensor are connect with the integrator computing unit respectively, the integrator computing unit and institute
Communication module connection is stated, the communication module carries out 3G/GPRS communications with the I/O modules and connects.
3. system according to claim 1, which is characterized in that have digital title equipped with built-in in the lime stone batcher
Refitting is set, in the digital weighing device equipped with weighing sensor, velocity sensor, weighing controller, integrator computing unit and
Communication module；The weighing sensor, the velocity sensor are connect with the weighing controller respectively, the weighing controller
It is connect with the integrator computing unit, the integrator computing unit is connect with the communication module, the communication module and the I/O moulds
Block carries out 3G/GPRS communication connections.
4. system according to claim 1, which is characterized in that the air volume meter, the coal sulfur content analyzer, described
It is respectively provided with communication module in nitrogen oxides measuring instrument and the flowmeter；The air volume meter, the coal sulfur content analyzer,
The nitrogen oxides measuring instrument and the flowmeter are carried out by the respectively internal communication module being equipped with the I/O modules respectively
3G/GPRS communication connections.
5. system according to claim 1, which is characterized in that the programmable logic controller (PLC) includes host CPU, AD conversion
Device, algorithm memory, PID regulator and I/O communication controllers；The AD converter, the algorithm memory and the PID tune
Section device is connect with the host CPU respectively；The I/O communication controllers are connect with the AD converter, the I/O communication controllers
Communication is carried out by I/O buses with the I/O modules to connect.
6. system according to claim 5, which is characterized in that the I/O communication controllers, for receiving the I/O moulds
Coal-supplying amount that block is sent, unit interval enter sulfur mass fraction in the total blast volume of burner hearth, coal, circulating fluidized bed boiler outlet
NO and NO2Mass flow, lime stone feeding coal and flue gas flow；The AD converter is used for the I/O Communication Controls
The signal that device receives is converted into digital signal, and is handled the digital signal by the PID regulator；The master
CPU, the overall cost for reading desulfurization inside and outside the wet desulphurization Properties of CFB stove stored in algorithm memory calculate
Algorithm, and according to the overall cost computational algorithm, to the PID regulator, treated that digital signal calculates, and is taken off
Sulphur overall cost；
Wherein, the overall cost computational algorithm includes that lime stone cost calculation in stove, the cost calculation of desulfurization heat loss, wet method are de-
Sulphur cost calculation, denitration cost calculation and comprehensive power consumption cost calculate.
7. system according to claim 5, which is characterized in that the programmable logic controller (PLC) further includes and the master
The SMS module of CPU connections, the SMS module are connected to mobile terminal or the host computer by wireless communication networks；Institute
SMS module is stated, for carrying out telephone call, SMS alarm and the alarm of ipc monitor interface.
8. system according to claim 1, which is characterized in that the host computer includes that at least one of following equipment is set
It is standby；The following equipment include operator station, history station, tab stops, computer installation, engineer station, printer, journal printer,
Large screen；The host computer, for showing the desulfurization overall cost inside and outside wet desulphurization Properties of CFB stove.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111085091A (en) * | 2020-01-02 | 2020-05-01 | 神华国能集团有限公司 | Method for determining desulfurization proportion inside and outside circulating fluidized bed boiler and desulfurization system |
| CN111750341A (en) * | 2020-07-08 | 2020-10-09 | 湖南大学 | Oxygen-enriched combustion system and control method thereof |
| CN112580890A (en) * | 2020-12-28 | 2021-03-30 | 湖南大唐先一科技有限公司 | Variable power generation cost prediction method and system for mixed coal burning of boiler for power generation |
| CN113050711A (en) * | 2021-03-24 | 2021-06-29 | 北京和隆优化科技股份有限公司 | Coordinated control method for internal and external desulfurization systems of circulating fluidized bed boiler |
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- 2017-11-23 CN CN201721582880.3U patent/CN207951100U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111085091A (en) * | 2020-01-02 | 2020-05-01 | 神华国能集团有限公司 | Method for determining desulfurization proportion inside and outside circulating fluidized bed boiler and desulfurization system |
| CN111750341A (en) * | 2020-07-08 | 2020-10-09 | 湖南大学 | Oxygen-enriched combustion system and control method thereof |
| CN111750341B (en) * | 2020-07-08 | 2023-03-14 | 湖南大学 | Oxygen-enriched combustion system and control method thereof |
| CN112580890A (en) * | 2020-12-28 | 2021-03-30 | 湖南大唐先一科技有限公司 | Variable power generation cost prediction method and system for mixed coal burning of boiler for power generation |
| CN113050711A (en) * | 2021-03-24 | 2021-06-29 | 北京和隆优化科技股份有限公司 | Coordinated control method for internal and external desulfurization systems of circulating fluidized bed boiler |
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