CN108072271A - A kind of annular lime kiln automaton and control method based on heat consumption - Google Patents
A kind of annular lime kiln automaton and control method based on heat consumption Download PDFInfo
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- CN108072271A CN108072271A CN201610975808.0A CN201610975808A CN108072271A CN 108072271 A CN108072271 A CN 108072271A CN 201610975808 A CN201610975808 A CN 201610975808A CN 108072271 A CN108072271 A CN 108072271A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B13/00—Furnaces with both stationary charge and progression of heating, e.g. of ring type, of type in which segmental kiln moves over stationary charge
- F27B13/06—Details, accessories, or equipment peculiar to furnaces of this type
- F27B13/14—Arrangement of controlling, monitoring, alarm or like devices
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The present invention provides a kind of annular lime kiln automaton and control method based on heat consumption.The present invention includes on-site data gathering device, the on-site data gathering device connection PLC control system, the PLC control system connection is mounted on the frequency converter of motor-driven valve and frequency conversion fan on pipeline, and the on-site data gathering device includes caloric value instrument, orifice flowmeter, pressure transmitter and thermocouple.The present invention has prevented the unstability that manual operation controls in sleeve kiln production process；It can technological parameter, heat consumption be horizontal during steady production and product quality；It monitors in real time and operates without operating personnel in real enterprise production process, reduce cost of labor.
Description
Technical field：
The present invention relates to a kind of annular lime kiln automatons and control method based on heat consumption, belong to Industrial Stoves thermal technology
Automatic control technology field.
Background technology：
Annular lime kiln is the kiln type for being commonly used to production active lime both at home and abroad at present, by being inserted in a circular sleeve
Lower two sleeves form heat resolve space of the annular space as lime burning.Interlock up and down in outer all around stems
6 combustion chamber of distribution, for decomposition of limestone provides institute's calorific requirement, by being supplied in the equipment adjusting kiln such as high-temperature blower, driving wind turbine
Wind forms preheating zone, adverse current burning zone, cocurrent burning zone, cooling zone, so as to fulfill the complete of lime in sleeve kiln inner annulus
Full calcining.This kiln type production activity of lime is high, and the negative-pressure operation feature of environmental protection is good, but because its control parameter is more, so to operation
The level requirement of personnel is higher.
Annular lime kiln control mode is mainly artificially to parameters such as rotation speed of fan, gas volume, air capacities both at home and abroad at present
It is adjusted, so as to reach the control to key parameters such as chamber temperature, recyclegas temperature.Raw material, coal coal gas, pressure,
Interrelated between the parameters such as temperature, flow influence each other, operating personnel are for the different understanding and controlled level of technique
Height necessarily causes the fluctuation of control parameter.
The content of the invention
The purpose of the present invention is provide a kind of annular lime kiln based on heat consumption in view of the above problems to automatically control
Device and control method have prevented the unstability of artificial control operation.
Above-mentioned purpose is achieved through the following technical solutions：
A kind of annular lime kiln automaton based on heat consumption, including on-site data gathering device, the field data
Harvester connects PLC control system, and PLC control system connection is mounted on motor-driven valve and frequency conversion fan on pipeline
Frequency converter, the on-site data gathering device include caloric value instrument, orifice flowmeter, pressure transmitter and thermocouple.
A kind of annular lime kiln autocontrol method based on heat consumption, this method include：
（1）Upper burner control：Burner gas volume is calculated,
Upper coal=M/24 × 1000 × the H/R/ of Q（1+a）/ 6,
In formula：H（kcal/kg）--- heat consumption inputs,
M（Ton day）--- yield,
R（kcal/m3）--- calorific value of gas,
A --- upper and lower coal gas ratio is 1：a、
Measured value is compared with requirements per 1-5min for air capacity Q overhead=upper coal × 0.45 of Q, adds up in current 1 minute
Error is more than 50-80m3, corresponding discharge is adjusted, carrying out action by the regulating valve of corresponding pipeline reaches flow-rate adjustment
Purpose, regulating valve act Frequency Synchronization with flow-rate ratio, and each regulated quantity is the 0.5-3% of aperture,
Judged per 5min by measured temperature with design temperature according to requirement is compared, when actual temperature is more than design temperature 3-
8 DEG C, air adjustment valve opening reduces 1%, and when actual temperature is less than 3-8 DEG C of design temperature, air adjustment valve opening increases by 1%, directly
In requiring, driving air tune can be turned to after upper burner is adjusted and stablized with design temperature difference control for supreme burner actual temperature
Section；
（2）Lower burner control：Control method is same as above burner control；
（3）Drive air adjustment：Driving air pressure is to determine P=0.085M according to Current production, M in formula（Ton day）--- production
Amount drives air pressure adjusting by adjusting frequency conversion drive wind turbine frequency to reach, and driving air actual pressure is less than required pressure
During more than 0.5kpa, frequency conversion drive wind turbine frequency 1Hz is improved, when driving air actual pressure higher than required pressure more than 0.5kpa
When, frequency conversion drive wind turbine frequency 1Hz is reduced, the driving air pressure control interval time is 2min, and preheating is detected after pressure stability
After drive air themperature, when driving air themperature less than 10 DEG C of design temperature after preheating, adjust air heat exchanger outlet regulating
Valve opening increases by 2%, when driving air themperature higher than 10 DEG C of design temperature after preheating, adjusts air heat exchanger index combustion fan
Aperture reduces 2%, and driving air adjustment goes to combustion chamber draft control after stablizing；
（4）Lime cooling air controls：The definite of lime cooling air volume is determined according to Current production, Q=cM/24 × 1000,
C- is adjusted between 0.45-0.65 according to environment temperature in formula, by adjust the valve on lime cooling air pipeline come
It realizes, is compared per 5min flows, when actual flow is more than demand volume 100m3During/h, reduce lime cooling air and adjust
Valve opening 1%, when actual flow is less than demand volume 100m3During/h, increase lime cooling air control valve opening 1%, lime is cold
But air flow control goes to lower combustion chamber's vacuum cavitations after stablizing；
（5）Combustion chamber draft controls：First by detecting that combustion chamber draft judges whether exception in live a period of time,
Negative pressure maxima and minima difference is no more than 400pa in i.e. 10 seconds, by high-temperature blower rotating speed locking without adjusting when having exception
Section, by combustion chamber, actual measure is compared after negative pressure value is analyzed according to analysis requirement with setting value if without exception, when
6 chamber pressure average values are less than -400pa in 5min, then reduce high-temperature blower rotating speed, can reduce coupler aperture 1%, when
6 chamber pressure average values then improve high-temperature blower rotating speed, can improve coupler aperture 1%, bear higher than -100pa in 5min
Voltage-controlled system goes to the control of lime cooling air delivery after stablizing；
（6）System controls：After the control of each control unit is stablized, entire control system continue to restart after 10min to data into
Row, which compares, to be adjusted.
Advantageous effect：
The present invention has fundamentally prevented the unstability that manual operation controls in sleeve kiln production process；It being capable of steady production
Technological parameter, heat consumption level and product quality in the process；It monitors in real time and operates without operating personnel in real enterprise production process,
Reduce cost of labor.
Description of the drawings
Fig. 1 is the flow chart of the present invention.
Attached drawing 2 is automatic control system state modulator logic schematic diagram：
Attached drawing 3 automatically controls relation principle figure.
Specific embodiment
With reference to embodiment, the present invention is furture elucidated, it should be understood that following specific embodiments are only used for
It is bright the present invention rather than limit the scope of the invention.
A kind of annular lime kiln automaton based on heat consumption, including on-site data gathering device, the scene
Data acquisition device connects PLC control system, and PLC control system connection is mounted on motor-driven valve and frequency conversion on pipeline
The frequency converter of wind turbine, the on-site data gathering device include caloric value instrument, orifice flowmeter, pressure transmitter and thermoelectricity
It is even.Caloric value instrument connection gas main road sampling, by gas calorific value apparatus on-line analysis calorific value of gas, by calorific value data transmission to PLC
In；Coal gas, the air capacity of 12 burners, in kiln cooling calcining complete lime lime cooling air delivery, by
Burner coal gas, air pipeline upper installing hole flowmeter calculate corresponding discharge by corresponding differential pressure transmitter, data on flows are passed
It transports in PLC；Air pressure and combustion chamber draft are driven, pressure transmitter is connected to by installing pressure guiding pipe on pipeline,
Pressure data is measured to be transmitted in PLC；Air themperature is driven after 12 chamber temperatures, 6 each recyclegas temperature, preheating,
By installing the thermocouple of different length in pipeline or combustion chamber side, relevant temperature is measured by its data transfer to PLC；Initially
Heat consumption, yield setting, the measurement for the data such as manual calorific value gives, combustion chamber draft gives, are artificially given by computer picture, by
Computer control software reads setting value and is transferred in PLC.
A kind of annular lime kiln autocontrol method based on heat consumption, this method include：
For the control of upper burner, the control of lower burner, the control of driving air, the control of lime cooling air, combustion chamber draft control totally 5
Closed loop is automatically controlled, while 5 control closed loops influence each other to form entire automatic control system.
（1）Upper burner control：Upper burner gas volume is calculated by data such as yield, calorific value of gas, initial heat consumptions：
Upper coal=M/24 × 1000 × the H/R/ of Q（1+a）/ 6,
In formula：H（kcal/kg）--- heat consumption inputs,
M（Ton day）--- yield,
R（kcal/m3）--- calorific value of gas,
A --- upper and lower coal gas ratio is 1：a）,
Air capacity（Q overhead=upper coal × 0.45 of Q）,
Per 3min（This later stage data acquisition intervals time can artificially adjust according to on-site actual situations between 1-5min）It will survey
Magnitude is compared with requirements, and cumulative errors are more than 80m in current 1 minute3（This error amount can the later stage according to degree of regulation into
Pedestrian is adjustment, and adjustable range is in 50-80m3Between）, corresponding discharge is adjusted, is carried out by the regulating valve of corresponding pipeline
Action achievees the purpose that flow-rate adjustment, and regulating valve acts Frequency Synchronization with flow-rate ratio, and each regulated quantity is the 1% of aperture（This is adjusted
Section amplitude can be adjusted between 0.5-3%）.Upper burner when gas volume reaches requirement can because raw material limestone etc. it is abnormal because
Element causes temperature that control requirement is not achieved, and can introduce the setting of burner temperature at this time, passes through measured temperature and setting temperature per 5min
Degree is judged according to requirement is compared, when actual temperature is more than 3 DEG C of design temperature（This temperature gap can be according to actual conditions in 3-
It is adjusted between 8 DEG C）, air adjustment valve opening reduction 1%, when actual temperature is less than 3 DEG C of design temperature, air control valve is opened
Degree increases by 1%, until upper burner actual temperature and design temperature difference control are in requiring.It can be turned to after upper burner is adjusted and stablized
Drive the automatic adjustment of air.
（2）Lower burner control：Lower burner coal gas is calculated by data such as yield, calorific value of gas, initial heat consumptions：
Coal=M/24 × 1000 × H/R × a/ under Q（1+a）/ 6,
In formula：H（kcal/kg）--- heat consumption inputs,
M（Ton day）--- yield,
R（kcal/m3）--- calorific value of gas,
A --- upper and lower coal gas ratio is 1：a）,
Air capacity（Coal × b under sky=Q, b can be adjusted between 0.1-0.55 under Q）,
Per 3min（This later stage data acquisition intervals time can artificially adjust according to on-site actual situations between 1-5min）It will survey
Magnitude is compared with requirements, and cumulative errors are more than 80m in current 1 minute3（This error amount can the later stage according to degree of regulation into
Pedestrian is adjustment, and adjustable range is in 50-80m3Between）, corresponding discharge is adjusted, is carried out by the regulating valve of corresponding pipeline
Action achievees the purpose that flow-rate adjustment, and regulating valve acts Frequency Synchronization with flow-rate ratio, and each regulated quantity is the 1% of aperture（This is adjusted
Section amplitude can be adjusted between 0.5-3%）.Combustion chamber draft can be gone to after lower burner coal gas, air capacity control are stablized
Automatic adjustment.
（3）Drive air adjustment：It is to determine P=0.085M, M according to Current production to drive air pressure（Ton day）--- production
Amount drives air pressure adjusting by adjusting frequency conversion drive wind turbine frequency to reach, and driving air actual pressure is less than required pressure
During more than 0.5kpa, frequency conversion drive wind turbine frequency 1Hz is improved, when driving air actual pressure higher than required pressure more than 0.5kpa
When, frequency conversion drive wind turbine frequency 1Hz is reduced, the driving air pressure control interval time is 2min, and preheating is detected after pressure stability
After drive air themperature.When driving air themperature less than 10 DEG C of design temperature after preheating, air heat exchanger outlet regulating is adjusted
Valve opening increases by 2%, when driving air themperature higher than 10 DEG C of design temperature after preheating, adjusts air heat exchanger index combustion fan
Aperture reduces 2%.Driving air adjustment goes to combustion chamber draft control after stablizing.
（4）Lime cooling air controls：The definite of lime cooling air volume is determined according to Current production（Q=cM/24×
1000, c- can be adjusted between 0.45-0.65 according to environment temperature）, by adjusting the valve on lime cooling air pipeline
Door is realized, is compared per 5min flows, when actual flow is more than demand volume 100m3During/h, lime cooling air is reduced
Control valve opening 1%, when actual flow is less than demand volume 100m3During/h, increase lime cooling air control valve opening 1%.Stone
Ash cooling air flow control goes to lower combustion chamber's vacuum cavitations after stablizing.
（5）Combustion chamber draft controls：First by detecting that combustion chamber draft judges whether in live a period of time
It is abnormal, i.e., in 10 seconds negative pressure maxima and minima difference no more than 400pa, when having an exception by high-temperature blower rotating speed locking not into
Row is adjusted, and by combustion chamber, actual measure is compared after negative pressure value is analyzed according to analysis requirement with setting value if without exception
It is right, when 6 chamber pressure average values less than -400pa, then reduce high-temperature blower rotating speed, can reduce coupler aperture in 5min
1%, when 6 chamber pressure average values higher than -100pa, then improve high-temperature blower rotating speed, can improve coupler aperture in 5min
1%.Vacuum cavitations go to the control of lime cooling air delivery after stablizing.
（6）System controls：After each control unit control is stablized, entire control system restarts logarithm after continuing 10min
It is adjusted according to being compared.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate the present invention's
Technical solution, and be not used as limitation of the invention, any connotation based on the present invention is to embodiment described above
Variation, the modification made will all fall in the scope of the claims of the present invention.
Claims (2)
1. a kind of annular lime kiln automaton based on heat consumption, it is characterized in that：It is described including on-site data gathering device
On-site data gathering device connection PLC control system, the PLC control system connection be mounted on pipeline on motor-driven valve with
And the frequency converter of frequency conversion fan, the on-site data gathering device include caloric value instrument, orifice flowmeter, pressure transmitter and
Thermocouple.
2. a kind of annular lime kiln autocontrol method based on heat consumption, it is characterized in that：This method includes：
（1）Upper burner control：Burner gas volume is calculated,
Upper coal=M/24 × 1000 × the H/R/ of Q（1+a）/ 6,
In formula：H（kcal/kg）--- heat consumption inputs,
M（Ton day）--- yield,
R（kcal/m3）--- calorific value of gas,
A --- upper and lower coal gas ratio is 1：a、
Measured value is compared with requirements per 1-5min for air capacity Q overhead=upper coal × 0.45 of Q, adds up in current 1 minute
Error is more than 50-80m3, corresponding discharge is adjusted, carrying out action by the regulating valve of corresponding pipeline reaches flow-rate adjustment
Purpose, regulating valve act Frequency Synchronization with flow-rate ratio, and each regulated quantity is the 0.5-3% of aperture,
Judged per 5min by measured temperature with design temperature according to requirement is compared, when actual temperature is more than design temperature 3-
8 DEG C, air adjustment valve opening reduces 1%, and when actual temperature is less than 3-8 DEG C of design temperature, air adjustment valve opening increases by 1%, directly
In requiring, driving air tune can be turned to after upper burner is adjusted and stablized with design temperature difference control for supreme burner actual temperature
Section；
（2）Lower burner control：Control method is same as above burner control；
（3）Drive air adjustment：Driving air pressure is to determine P=0.085M according to Current production, M in formula（Ton day）--- production
Amount drives air pressure adjusting by adjusting frequency conversion drive wind turbine frequency to reach, and driving air actual pressure is less than required pressure
During more than 0.5kpa, frequency conversion drive wind turbine frequency 1Hz is improved, when driving air actual pressure higher than required pressure more than 0.5kpa
When, frequency conversion drive wind turbine frequency 1Hz is reduced, the driving air pressure control interval time is 2min, and preheating is detected after pressure stability
After drive air themperature, when driving air themperature less than 10 DEG C of design temperature after preheating, adjust air heat exchanger outlet regulating
Valve opening increases by 2%, when driving air themperature higher than 10 DEG C of design temperature after preheating, adjusts air heat exchanger index combustion fan
Aperture reduces 2%, and driving air adjustment goes to combustion chamber draft control after stablizing；
（4）Lime cooling air controls：The definite of lime cooling air volume is determined according to Current production, Q=cM/24 × 1000,
C- is adjusted between 0.45-0.65 according to environment temperature in formula, by adjust the valve on lime cooling air pipeline come
It realizes, is compared per 5min flows, when actual flow is more than demand volume 100m3During/h, reduce lime cooling air and adjust
Valve opening 1%, when actual flow is less than demand volume 100m3During/h, increase lime cooling air control valve opening 1%, lime is cold
But air flow control goes to lower combustion chamber's vacuum cavitations after stablizing；
（5）Combustion chamber draft controls：First by detecting that combustion chamber draft judges whether exception in live a period of time,
Negative pressure maxima and minima difference is no more than 400pa in i.e. 10 seconds, by high-temperature blower rotating speed locking without adjusting when having exception
Section, by combustion chamber, actual measure is compared after negative pressure value is analyzed according to analysis requirement with setting value if without exception, when
6 chamber pressure average values are less than -400pa in 5min, then reduce high-temperature blower rotating speed, can reduce coupler aperture 1%, when
6 chamber pressure average values then improve high-temperature blower rotating speed, can improve coupler aperture 1%, bear higher than -100pa in 5min
Voltage-controlled system goes to the control of lime cooling air delivery after stablizing；
（6）System controls：After the control of each control unit is stablized, entire control system continue to restart after 10min to data into
Row, which compares, to be adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610975808.0A CN108072271A (en) | 2016-11-07 | 2016-11-07 | A kind of annular lime kiln automaton and control method based on heat consumption |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610975808.0A CN108072271A (en) | 2016-11-07 | 2016-11-07 | A kind of annular lime kiln automaton and control method based on heat consumption |
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| CN108072271A true CN108072271A (en) | 2018-05-25 |
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| CN201610975808.0A Pending CN108072271A (en) | 2016-11-07 | 2016-11-07 | A kind of annular lime kiln automaton and control method based on heat consumption |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739570A (en) * | 2020-05-29 | 2021-12-03 | 南京宝地梅山产城发展有限公司 | Automatic control system and control method for circulating air temperature of annular sleeve kiln |
| CN115406260A (en) * | 2022-08-02 | 2022-11-29 | 重庆赛迪热工环保工程技术有限公司 | Method and system applied to intelligent control of combustion of rotary hearth furnace |
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| KR20020002048A (en) * | 2000-06-29 | 2002-01-09 | 이구택 | A method of controlling temperature in a shaft kiln |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739570A (en) * | 2020-05-29 | 2021-12-03 | 南京宝地梅山产城发展有限公司 | Automatic control system and control method for circulating air temperature of annular sleeve kiln |
| CN115406260A (en) * | 2022-08-02 | 2022-11-29 | 重庆赛迪热工环保工程技术有限公司 | Method and system applied to intelligent control of combustion of rotary hearth furnace |
| CN115406260B (en) * | 2022-08-02 | 2024-06-18 | 重庆赛迪热工环保工程技术有限公司 | Method and system applied to intelligent control of rotary hearth furnace combustion |
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Application publication date: 20180525 |