CN107166428A - A kind of grate firing boiler flue gas oxygen content control system based on flue gas recirculation - Google Patents
A kind of grate firing boiler flue gas oxygen content control system based on flue gas recirculation Download PDFInfo
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- CN107166428A CN107166428A CN201710605793.3A CN201710605793A CN107166428A CN 107166428 A CN107166428 A CN 107166428A CN 201710605793 A CN201710605793 A CN 201710605793A CN 107166428 A CN107166428 A CN 107166428A
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- flue gas
- boiler
- firing boiler
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/06—Regulating air supply or draught by conjoint operation of two or more valves or dampers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B80/00—Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel
- F23B80/02—Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel by means for returning flue gases to the combustion chamber or to the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2221/00—Pretreatment or prehandling
- F23N2221/12—Recycling exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2239/00—Fuels
- F23N2239/02—Solid fuels
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Regulation And Control Of Combustion (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention provides a kind of grate firing boiler flue gas oxygen content control system based on flue gas recirculation, mainly it is made up of grate firing boiler, pressure fan, gas recirculating fan, Zirconium oxide analyzer, airduct and DCS system (or PLC system) etc., Combustion System and the burning optimization field of grate firing boiler can be widely used in.The present invention uses conventional equipment, dependable performance is stable, boiler stable operation under extremely low load (30% rated load) can not only be realized, reduce the dust stratification of heated surface at the end of boiler, and boiler oxynitrides initial ejection concentration can be reduced by 15 20%, the thermal efficiency under boiler at low load is improved more than 5%.
Description
Technical field
The invention belongs to grate firing boiler technical field, more particularly to a kind of grate firing boiler flue gas based on flue gas recirculation
System for controlling oxygen content.
Background technology
Industrial Boiler is important thermal powerplant, accounts for more than the 98% of China's boiler total amount.In coal-burned industrial boiler
In, grate furnace accounts for 80% of total capacity or so, and indispensable effect is played in the national economic development, resident living.
However, being that quantity is more the characteristics of China's grate firing boiler, individual capacity is small, and the thermal efficiency is low, load variations are big, particularly
Production and the shared Industrial Boiler of heating are substantially all carries out type selecting according to the peak load demand of Heating Season, causes non-heating season
(stopping warm rear) is in is run compared with underload for a long time.The traditional oxygen content control system of grate firing boiler is only by boiler fan
Inlet baffle is adjusted and controlled, but in order to ensure the horizontal cloth wind of boiler at low load operation lower fire grating is uniform, and keep certain
Penetrability, air-supply blast preferably must be held on minimum blast, along with the air compartment wind that leaks out and alter is larger, oxygen content in flue gas
Up to 15% (excess air coefficient is 3.5) left and right, increases exhaust gas volumn, and because boiler is in underrun, flue gas flow rate
Relatively low, the back-end surfaces such as convection bank, economizer, air preheater dust stratification is serious, exhaust gas temperature rise, boiler exhaust gas heat waste
Mistake is larger, not only increases enterprise's fuel cost, wastes coal resources.Meanwhile, because oxygen amount is seriously superfluous in stove, fire coal combustion
Burn the oxynitride concentration produced higher, add environmental protection of enterprise operating cost.
Therefore, how to solve the above problems becomes the direction of art personnel effort.
The content of the invention
It is an object of the invention to provide a kind of grate firing boiler flue gas oxygen content control system based on flue gas recirculation, energy
It is fully solved in place of above-mentioned the deficiencies in the prior art.
The purpose of the present invention is realized by following technical proposals：
A kind of grate firing boiler flue gas oxygen content control system based on flue gas recirculation, mainly by grate firing boiler, pressure fan,
Gas recirculating fan, Zirconium oxide analyzer, airduct and DCS system (or PLC system) composition, the burner hearth of the grate firing boiler with
Connected between pressure fan by airduct, the outlet flue of grate firing boiler is installed on Zirconium oxide analyzer, the smoke-outlet flue of grate firing boiler
Gas recirculating fan is set, and the gas recirculating fan connects the air inlet of pressure fan, flue gas recirculation wind by airduct
Machine is connected with the first fan frequency conversion controller and electric control valve one, and electric control valve one is connected installed in gas recirculating fan
On the airduct of pressure fan air inlet, the pressure fan is connected with the second fan frequency conversion controller, and the air outlet of pressure fan is provided with
Electric control valve two and pressure transmitter, the DCS system (or PLC system) are provided with main PID regulator and auxiliary PID regulations
Device, the main PID regulator connection Zirconium oxide analyzer, the second fan frequency conversion controller, electric control valve two and pressure inverting
Device, the auxiliary PID regulator connection fan frequency conversion controller of electric control valve one and first.
Further, it is provided with deduster on the smoke-outlet flue of the grate firing boiler, deduster connection DCS system (or PLC systems
System), gas recirculating fan is set after the export pipeline of deduster.
This design is the larger dust of recyclable particle and charcoal ash in order to be filtered to cigarette, by free from admixture after filtering
Cigarette sends into gas recirculating fan, is conducive to blower fan preferably to run, and improves the operational efficiency of blower fan, also reduces to environment
Pollution.
Further, the airduct between the pressure fan connection grate firing boiler burner hearth is divided into two, and one is upcast ventilation pipe, connection
In the middle part of the burner hearth of grate firing boiler, another is lower air conduit, connects the burner hearth bottom of grate firing boiler, two points of the electric control valve is
A number electric control valve and No. two electric control valves, an electric control valve control upcast ventilation pipe, under No. two electric control valve controls
Airduct.
This design can distinguish air intake to the bottom of grate firing boiler burner hearth and middle part, be more beneficial for entering the oxygen content in burner hearth
Row regulation, optimization burning.
Further, the pressure fan and gas recirculating fan use centrifugal fan, and Fan Bearing Box is used and followed
Ring cooling water is cooled down, and volute of blower takes insulation insulation.
This design is more suitable for boiler requirement, it is not necessary to compression fluid, while being easy to adjust air draft parameter.
Compared with prior art, the beneficial effects of the present invention are：
1. the present invention can realize Automatic Control to grate firing boiler flue gas oxygen content, artificial manipulation strength is reduced, is improved
Accuracy, the reliability and stability of operation control；
2. invention increases the load variations scope of boiler, it can realize that boiler is steady under 30%-110% rated loads
Fixed operation；
3. the present invention reduces the product of boiler heating surface such as superheater, convection bank, economizer under underrun operating mode
Ash, improves the cycle of operation of boiler, also reduces exhaust gas temperature, boiler is under underrun, and flue gas oxygen content still can
Enough control below 8% (excessive duty factor is 1.6)；While solid and heat loss due to unburned gases is not increased, reduction
Boiler exhaust gas heat loss, boiler thermal output improves more than 5%；
4. the present invention makes boiler oxynitrides initial ejection concentration reduce 15-20%, denitration expense has been saved；
5. the present invention selects conventional equipment, using the DCS or PLC control system of boiler itself, fund input is smaller, simultaneously
Respond national energy-saving emission reduction policy, save coal resources, reduce environmental pollution, with significant economic benefit, social benefit and
Environmental benefit.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the control system schematic diagram of the present invention.
Embodiment
With reference to specific embodiments and the drawings, the present invention is further illustrated.
Embodiment one
As shown in Figure 1 to Figure 2, a kind of grate firing boiler flue gas oxygen content control system based on flue gas recirculation, mainly by
6 groups of grate firing boiler 1, pressure fan 2, gas recirculating fan 3, Zirconium oxide analyzer 4, airduct 5 and DCS system (or PLC system)
Into being connected between the burner hearth and pressure fan 2 of the grate firing boiler 1 by airduct 5, the outlet flue of grate firing boiler 1 installs zirconium oxide
Gas recirculating fan 3 is set on analyzer 4, the smoke-outlet flue of grate firing boiler 1, and the gas recirculating fan 3 passes through airduct 5
The air inlet of pressure fan 2 is connected, gas recirculating fan 3 is connected with the first fan frequency conversion controller 10 and electric control valve 1,
Electric control valve 1 is arranged on gas recirculating fan 3 and connected on the airduct 5 of the air inlet of pressure fan 2, and the pressure fan 2 is connected
There is the second fan frequency conversion controller 11, the air outlet of pressure fan 2 is provided with electric control valve 28 and pressure transmitter 9, described
DCS system (or PLC system) 6 is provided with main PID regulator 12 and auxiliary PID regulator 13, the main connection of PID regulator 12 oxygen
Change zirconium analyzer 4, the second fan frequency conversion controller 11, electric control valve 28 and pressure transmitter 9, the auxiliary PID regulator 13
Connect the fan frequency conversion controller 10 of electric control valve one 7 and first.
Embodiment two
As shown in Figure 1 to Figure 2, a kind of grate firing boiler flue gas oxygen content control system based on flue gas recirculation, mainly by
6 groups of grate firing boiler 1, pressure fan 2, gas recirculating fan 3, Zirconium oxide analyzer 4, airduct 5 and DCS system (or PLC system)
Into being connected between the burner hearth and pressure fan 2 of the grate firing boiler 1 by airduct 5, the outlet flue of grate firing boiler 1 installs zirconium oxide
Gas recirculating fan 3 is set on analyzer 4, the smoke-outlet flue of grate firing boiler 1, and the gas recirculating fan 3 passes through airduct 5
The air inlet of pressure fan 2 is connected, gas recirculating fan 3 is connected with the first fan frequency conversion controller 10 and electric control valve 1,
Electric control valve 1 is arranged on gas recirculating fan 3 and connected on the airduct 5 of the air inlet of pressure fan 2, and the pressure fan 2 is connected
There is the second fan frequency conversion controller 11, the air outlet of pressure fan 2 is provided with electric control valve 28 and pressure transmitter 9, described
DCS system (or PLC system) 6 is provided with main PID regulator 12 and auxiliary PID regulator 13, the main connection of PID regulator 12 oxygen
Change zirconium analyzer 4, the second fan frequency conversion controller 11, electric control valve 28 and pressure transmitter 9, the auxiliary PID regulator 13
Connect the fan frequency conversion controller 10 of electric control valve one 7 and first.
It is provided with deduster 14 on the smoke-outlet flue of the grate firing boiler 1, the connection of deduster 14 DCS system (or PLC systems
System) 6, gas recirculating fan 3 is set after the export pipeline of deduster 14.Deduster 14 can be filtered to cigarette, recovery
The larger dust of grain and charcoal ash, send the cigarette of free from admixture after filtering into gas recirculating fan 3, are conducive to blower fan preferably to transport
OK, the operational efficiency of blower fan is improved, the pollution to environment is also reduced.
Embodiment three
As shown in Figure 1 to Figure 2, a kind of grate firing boiler flue gas oxygen content control system based on flue gas recirculation, mainly by
6 groups of grate firing boiler 1, pressure fan 2, gas recirculating fan 3, Zirconium oxide analyzer 4, airduct 5 and DCS system (or PLC system)
Into being connected between the burner hearth and pressure fan 2 of the grate firing boiler 1 by airduct 5, the outlet flue of grate firing boiler 1 installs zirconium oxide
Gas recirculating fan 3 is set on analyzer 4, the smoke-outlet flue of grate firing boiler 1, and the gas recirculating fan 3 passes through airduct 5
The air inlet of pressure fan 2 is connected, gas recirculating fan 3 is connected with the first fan frequency conversion controller 10 and electric control valve 1,
Electric control valve 1 is arranged on gas recirculating fan 3 and connected on the airduct 5 of the air inlet of pressure fan 2, and the pressure fan 2 is connected
There is the second fan frequency conversion controller 11, the air outlet of pressure fan 2 is provided with electric control valve 28 and pressure transmitter 9, described
DCS system (or PLC system) 6 is provided with main PID regulator 12 and auxiliary PID regulator 13, the main connection of PID regulator 12 oxygen
Change zirconium analyzer 4, the second fan frequency conversion controller 11, electric control valve 28 and pressure transmitter 9, the auxiliary PID regulator 13
Connect the fan frequency conversion controller 10 of electric control valve one 7 and first.
It is provided with deduster 14 on the smoke-outlet flue of the grate firing boiler 1, the connection of deduster 14 DCS system (or PLC systems
System) 6, gas recirculating fan 3 is set after the export pipeline of deduster 14.Deduster 14 can be filtered to cigarette, recovery
The larger dust of grain and charcoal ash, send the cigarette of free from admixture after filtering into gas recirculating fan 3, are conducive to blower fan preferably to transport
OK, the operational efficiency of blower fan is improved, the pollution to environment is also reduced.
5 points of airduct between the connection of pressure fan 2 burner hearth of grate firing boiler 1 is two, and one is upcast ventilation pipe, articulamentum combustion
In the middle part of the burner hearth of boiler 1, another is lower air conduit, connects the burner hearth bottom of grate firing boiler 1,28 points of the electric control valve is
A number electric control valve and No. two electric control valves, an electric control valve control upcast ventilation pipe, under No. two electric control valve controls
Airduct.Can thus air intake be distinguished to the bottom of the burner hearth of grate firing boiler 1 and middle part, be more beneficial for carrying out the oxygen content in burner hearth
Regulation, optimization burning.
Example IV
As shown in Figure 1 to Figure 2, a kind of grate firing boiler flue gas oxygen content control system based on flue gas recirculation, mainly by
6 groups of grate firing boiler 1, pressure fan 2, gas recirculating fan 3, Zirconium oxide analyzer 4, airduct 5 and DCS system (or PLC system)
Into being connected between the burner hearth and pressure fan 2 of the grate firing boiler 1 by airduct 5, the outlet flue of grate firing boiler 1 installs zirconium oxide
Gas recirculating fan 3 is set on analyzer 4, the smoke-outlet flue of grate firing boiler 1, and the gas recirculating fan 3 passes through airduct 5
The air inlet of pressure fan 2 is connected, gas recirculating fan 3 is connected with the first fan frequency conversion controller 10 and electric control valve 1,
Electric control valve 1 is arranged on gas recirculating fan 3 and connected on the airduct 5 of the air inlet of pressure fan 2, and the pressure fan 2 is connected
There is the second fan frequency conversion controller 11, the air outlet of pressure fan 2 is provided with electric control valve 28 and pressure transmitter 9, described
DCS system (or PLC system) 6 is provided with main PID regulator 12 and auxiliary PID regulator 13, the main connection of PID regulator 12 oxygen
Change zirconium analyzer 4, the second fan frequency conversion controller 11, electric control valve 28 and pressure transmitter 9, the auxiliary PID regulator 13
Connect the fan frequency conversion controller 10 of electric control valve one 7 and first.
It is provided with deduster 14 on the smoke-outlet flue of the grate firing boiler 1, the connection of deduster 14 DCS system (or PLC systems
System) 6, gas recirculating fan 3 is set after the export pipeline of deduster 14.Deduster 14 can be filtered to cigarette, recovery
The larger dust of grain and charcoal ash, send the cigarette of free from admixture after filtering into gas recirculating fan 3, are conducive to blower fan preferably to transport
OK, the operational efficiency of blower fan is improved, the pollution to environment is also reduced.
5 points of airduct between the connection of pressure fan 2 burner hearth of grate firing boiler 1 is two, and one is upcast ventilation pipe, articulamentum combustion
In the middle part of the burner hearth of boiler 1, another is lower air conduit, connects the burner hearth bottom of grate firing boiler 1,28 points of the electric control valve is
A number electric control valve and No. two electric control valves, an electric control valve control upcast ventilation pipe, under No. two electric control valve controls
Airduct.Can thus air intake be distinguished to the bottom of the burner hearth of grate firing boiler 1 and middle part, be more beneficial for carrying out the oxygen content in burner hearth
Regulation, optimization burning.
The pressure fan 2 and gas recirculating fan 3 use centrifugal fan, are easy to adjust air draft parameter, fan shaft
Hold case to be cooled down using recirculated cooling water, volute of blower takes insulation insulation.
The present invention control principle be：
1. when the outlet flue oxygen content and pressure transmitter 9 that Zirconium oxide analyzer 4 detects grate firing boiler 1 detect air-supply
When the air outlet blast of machine 2 is above setting value, main PID regulator 12 is acted on first, and the second blower fan connected to pressure fan 2 becomes
Frequency controller 11 sends instruction, reduces the electric machine frequency of pressure fan 2, until the electric machine frequency of pressure fan 2 reach setting lower limit or
Outlet flue oxygen content reaches setting value.In the process, when the outlet blast of pressure fan 2 is less than setting value, auxiliary PID regulator
13 also begin to effect, and the first fan frequency conversion controller 10 connected to gas recirculating fan 3 sends instruction, and increase flue gas is followed again
The electric machine frequency of ring blower fan 3；Main PID regulator 12 continues to send instruction to the second fan frequency conversion controller 11, reduces pressure fan 2
Electric machine frequency, the outlet blast of pressure fan 2 is maintained at setting value, until the electric machine frequency of gas recirculating fan 3 reaches
The setting upper limit or outlet flue oxygen content reach setting value.During regulation, corresponding electric control valve respective action.
2. when outlet flue oxygen content is higher than setting value, and the outlet blast of pressure fan 2 is less than setting value, auxiliary PID regulator
13 effects, instruction is sent to the first fan frequency conversion controller 10, increases the electric machine frequency of gas recirculating fan 3, until flue gas
The electric machine frequency of recirculation blower 3 reaches that the setting upper limit or outlet flue oxygen content reach setting value.When gas recirculating fan 3
Electric machine frequency has reached the setting upper limit, when outlet flue oxygen content still is below setting value, and main PID regulator 12 is also acted on, to
Two fan frequency conversion controllers 11 send instruction, increase the electric machine frequency of pressure fan 2, until outlet flue oxygen content reaches setting value.
During regulation, corresponding electric control valve respective action.
3. when outlet flue oxygen content is less than setting value, and the outlet blast of pressure fan 2 is higher than setting value, auxiliary PID regulator
13 are acted on first, and instruction is sent to the first fan frequency conversion controller 10, reduce the electric machine frequency of gas recirculating fan 3, until
The electric machine frequency of gas recirculating fan 3 reaches that setting lower limit or outlet flue oxygen content reach setting value；In the process, when sending
When the outlet blast of blower fan 2 is less than setting value, main PID regulator 12 is acted on, and instruction is sent to the second fan frequency conversion controller 11,
Increase the electric machine frequency of pressure fan 2, the outlet blast of pressure fan 2 is higher than setting value, set until furnace outlet oxygen content reaches
Definite value.During regulation, corresponding electric control valve respective action.
4. when the outlet blast of outlet flue oxygen content and pressure fan 2 is below setting value, main PID regulator 12 is acted on,
Instruction is sent to the second fan frequency conversion controller 11, increases the electric machine frequency of pressure fan 2, until outlet flue oxygen content reaches setting
Value；In the process, auxiliary PID regulator 13 is also acted on, and instruction is sent to the first fan frequency conversion controller 10, and reduction flue gas is followed again
The electric machine frequency of ring blower fan 3, until the electric machine frequency of gas recirculating fan 3 reaches setting lower limit.During regulation, corresponding electricity
Dynamic regulating valve respective action.
The present invention can produce following effect：
1. Automatic Control can be realized to the flue gas oxygen content of grate firing boiler 1, artificial manipulation strength is reduced, operation is improved
Accuracy, the reliability and stability of control；
2. increasing the load variations scope of boiler, boiler stable fortune under 30%-110% rated loads can be realized
OK；
3. reducing the dust stratification of boiler heating surface such as superheater, convection bank, economizer under underrun operating mode, improve
The cycle of operation of boiler, also reduce exhaust gas temperature, boiler is under underrun, and flue gas oxygen content remains able to control and existed
Less than 8% (excessive duty factor is 1.6)；While solid and heat loss due to unburned gases is not increased, boiler exhaust gas is reduced
Heat loss, boiler thermal output improves more than 5%；
4. making boiler oxynitrides initial ejection concentration reduce 15-20%, denitration expense has been saved；
5. selecting conventional equipment, using the DCS system (or PLC system) 6 of boiler itself, fund input is smaller, rings simultaneously
National energy-saving emission reduction policy is answered, coal resources are saved, environmental pollution is reduced, with significant economic benefit, social benefit and ring
Protect benefit.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (4)
1. a kind of grate firing boiler flue gas oxygen content control system based on flue gas recirculation, mainly by grate firing boiler (1), pressure fan
(2), gas recirculating fan (3), Zirconium oxide analyzer (4), airduct (5) and DCS system (or PLC system) (6) composition, it is special
Levy and be：It is connected between the burner hearth of the grate firing boiler (1) and pressure fan (2) by airduct (5), the smoke of grate firing boiler (1)
Mouth, which is installed, sets gas recirculating fan (3) on Zirconium oxide analyzer (4), the smoke-outlet flue of grate firing boiler (1), the flue gas is again
Circulating fan (3) connects the air inlet of pressure fan (2) by airduct (5), and gas recirculating fan (3) is connected with the change of the first blower fan
Frequency controller (10) and electric control valve one (7), electric control valve one (7) are arranged on gas recirculating fan (3) and connect air-supply
On the airduct (5) of machine (2) air inlet, the pressure fan (2) is connected with the second fan frequency conversion controller (11), pressure fan (2)
Air outlet is provided with electric control valve two (8) and pressure transmitter (9), and the DCS system (or PLC system) (6) is provided with master
PID regulator (12) and auxiliary PID regulator (13), main PID regulator (12) the connection Zirconium oxide analyzer (4), the second wind
Machine frequency-variable controller (11), electric control valve two (8) and pressure transmitter (9), auxiliary PID regulator (13) the connection electric adjustable
Save valve one (7) and the first fan frequency conversion controller (10).
2. the grate firing boiler flue gas oxygen content control system according to claim 1 based on flue gas recirculation, its feature exists
In：It is provided with deduster (14) on the smoke-outlet flue of the grate firing boiler (1), deduster (14) connection DCS system (or PLC systems
System) (6), gas recirculating fan (3) is set after the export pipeline of deduster (14).
3. the grate firing boiler flue gas oxygen content control system according to claim 1 based on flue gas recirculation, its feature exists
In：Airduct (5) between described pressure fan (2) connection grate firing boiler (1) burner hearth is divided into two, and one is upcast ventilation pipe, articulamentum
In the middle part of the burner hearth of combusting boiler (1), another is lower air conduit, the burner hearth bottom of connection grate firing boiler (1), the electric control valve two
(8) it is divided into an electric control valve and No. two electric control valves, an electric control valve controls upcast ventilation pipe, No. two electric control valves
Control lower air conduit.
4. the grate firing boiler flue gas oxygen content control system according to claim 1 based on flue gas recirculation, its feature exists
In：The pressure fan (2) and gas recirculating fan (3) use centrifugal fan, and Fan Bearing Box uses circulating cooling
Water is cooled down, and volute of blower takes insulation insulation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710605793.3A CN107166428B (en) | 2017-07-24 | 2017-07-24 | Layer combustion boiler flue gas oxygen content control system based on flue gas recirculation |
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| CN201710605793.3A CN107166428B (en) | 2017-07-24 | 2017-07-24 | Layer combustion boiler flue gas oxygen content control system based on flue gas recirculation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109519964A (en) * | 2018-12-28 | 2019-03-26 | 启明星宇节能科技股份有限公司 | Boiler fresh air self-balancing adjustment equipment |
| CN111174197A (en) * | 2020-01-14 | 2020-05-19 | 湖南文理学院 | Method for detecting and controlling oxygen content of boiler flue gas of power plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111174197A (en) * | 2020-01-14 | 2020-05-19 | 湖南文理学院 | Method for detecting and controlling oxygen content of boiler flue gas of power plant |
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| Publication number | Publication date |
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| CN107166428B (en) | 2023-05-23 |
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