CN107436090A - The control system and method for a kind of rotary hearth furnace - Google Patents
The control system and method for a kind of rotary hearth furnace Download PDFInfo
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- CN107436090A CN107436090A CN201710739952.9A CN201710739952A CN107436090A CN 107436090 A CN107436090 A CN 107436090A CN 201710739952 A CN201710739952 A CN 201710739952A CN 107436090 A CN107436090 A CN 107436090A
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- area
- preheating zone
- control
- pressure
- warm area
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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
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/16—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a circular or arcuate path
-
- 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
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/40—Arrangements of controlling or monitoring devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0006—Monitoring the characteristics (composition, quantities, temperature, pressure) of at least one of the gases of the kiln atmosphere and using it as a controlling value
- F27D2019/0009—Monitoring the pressure in an enclosure or kiln zone
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0006—Monitoring the characteristics (composition, quantities, temperature, pressure) of at least one of the gases of the kiln atmosphere and using it as a controlling value
- F27D2019/0012—Monitoring the composition of the atmosphere or of one of their components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0068—Regulation involving a measured inflow of a particular gas in the enclosure
Abstract
The present invention discloses the control system and method for a kind of rotary hearth furnace.The control system includes main controller, temperature control unit, control climate unit, pressure control unit；The temperature control modules of main controller coordinate with temperature control unit, control the temperature of rotary hearth furnace；The control climate module of main controller and control climate unit matching, control the reducing atmosphere in rotary hearth furnace；The pressure control module of main controller coordinates with pressure control unit, controls the pressure of rotary hearth furnace.The cooperation that the present invention passes through main controller and each control unit, realize the control to temperature, reducing atmosphere, pressure in rotary hearth furnace, so that the temperature control in rotary hearth furnace is in a rational scope, CO stable contents in reducing atmosphere in stove, pressure in stove keeps gradient distribution, be advantageous to the generation of material, increase economic efficiency.
Description
Technical field
The invention belongs to the control system and method for automation field, more particularly to a kind of rotary hearth furnace.
Background technology
Rotary hearth furnace belongs to one kind of industrial furnace, and working method is that furnace roof, furnace wall are motionless, is rotated by furnace bottom and allows material to move
Heated by each heating zone.Its burner hearth in a ring, is divided into multiple control zones, except burner loading area and stove tail discharge zone
Outside, also heating zone, such as preheating zone, middle warm area, the area of high temperature one, the area of high temperature two, the area of high temperature three.On the furnace wall of each heating zone
A number of burner is arranged, in-furnace temperature is controlled by adjusting burner fuel load.Raw material enters stove from loading area
Afterwards, by the rotation of furnace bottom, rotate raw material and pass through each temperature-controlled area successively, finally utilize drawing mechanism from stove discharge zone
Raw material is sent out.
It is general using classical bicrossing limitation control in terms of the technology controlling and process of existing rotary hearth furnace focuses mainly on Control for Kiln Temperature
Preparation method is controlled to furnace temperature, to ensure the accurate control of the abundant burning of fuel and furnace temperature.
At present, what bi -cross limitation control method mainly solved is the abundant burning for ensureing fuel, it is impossible to reducing process
Unique atmosphere, pressure in the burner hearth situation carry out coordination control, or the result is that atmosphere can not be controlled, can not meet raw material needs
Reductive condition and fume emission environmental protection condition, or cause after burner hearth fuel combustion pressure not distribution gradient, no
Beneficial to the smooth discharge of flue gas.
The content of the invention
In order to solve the above problems, the present invention proposes a kind of control system and method for rotary hearth furnace, to each in rotary hearth furnace
The content of CO in the reducing atmosphere of heating zone is monitored in real time, and realizes the real-time control of pressure, ensures each heating
The reducing atmosphere in area meets the requirement of reduction reaction.
An object of the present invention is to provide a kind of control system of rotary hearth furnace, and the rotary hearth furnace includes preheating zone, medium temperature
Area, the area of high temperature one, the area of high temperature two and the area of high temperature three, the control system include main controller and atmosphere control unit；
The main controller includes control climate module, and the control climate module includes preheating zone atmosphere controller and medium temperature
Area's atmosphere controller；
The control climate unit includes：Air-valve is mended in preheating zone, middle warm area mends air-valve, the preheating zone gas positioned at preheating zone
Analyzer, the middle warm area gas analyzer positioned at middle warm area；
The preheating zone gas analyzer connects the preheating zone atmosphere controller, the preheating zone atmosphere controller control
The aperture of air-valve is mended in the preheating zone, and the secondary air channel that air-valve connects the preheating zone, the middle warm area gas are mended in the preheating zone
Analyzer connects the middle warm area atmosphere controller, and the middle warm area atmosphere controller control middle warm area mends opening for air-valve
Degree, the middle warm area mend the secondary air channel that air-valve connects the middle warm area.
As preferred embodiments of the present invention, the main controller also includes pressure control module, the pressure control module bag
Include signal selector；The control system also includes pressure control unit, and the pressure control unit is included positioned at preheating zone
Preheating zone pressure sensor, the middle warm area pressure sensor positioned at middle warm area, the area's pressure sensing of high temperature one positioned at the area of high temperature one
Device, the area's pressure sensor of high temperature two positioned at the area of high temperature two, the area's pressure sensor of high temperature three positioned at the area of high temperature three and connection are pre-
The smoke exhaust fan of hot-zone；The preheating zone pressure sensor, middle warm area pressure sensor, the area's pressure sensor of high temperature one, high temperature
Two area's pressure sensors connect the pressure control module with the area's pressure sensor of high temperature three, and the pressure control module controls institute
State the exhaust air rate of smoke exhaust fan.
As preferred embodiments of the present invention, the main controller also includes temperature control modules, and the control system also includes
Temperature control unit, the temperature control modules control the temperature control unit to adjust the temperature in the rotary hearth furnace.
It is a further object of the present invention to provide one kind using above-mentioned control system, the method for controlling rotary hearth furnace, including it is following
Step：
The CO of preheating zone and middle warm area is set respectively on the preheating zone atmosphere controller and middle warm area atmosphere controller
Content setting value；
The content of the preheating zone gas analyzer collection preheating zone CO, and send a signal to the preheating zone atmosphere control
Device processed, warm area CO content in the middle warm area gas analyzer collection, and send a signal to middle warm area atmosphere controller；
The preheating zone atmosphere controller controls the preheating zone to mend air-valve adjustment according to the CO content setting values of preheating zone
The benefit air quantity of preheating zone；
The CO content setting values of middle warm area atmosphere controller warm area in, the control middle warm area mend air-valve adjustment
The benefit air quantity of middle warm area.
Further, when the CO contents of the middle warm area are too low, the middle warm area atmosphere controller controls the middle warm area
The aperture for mending air-valve diminishes, the benefit air quantity of warm area in reduction；During the CO too high levels of the middle warm area, the middle warm area atmosphere control
The aperture that the device control middle warm area processed mends air-valve becomes big, the benefit air quantity of warm area in increase.
As preferable scheme, method of the invention also includes step：
Pressure differential resetting value is set on the pressure control module by the signal selector；
The preheating zone pressure sensor, middle warm area pressure sensor, the area's pressure sensor of high temperature one, the area's pressure of high temperature two
Sensor, the area's pressure sensor of high temperature three gather the pressure of region, and send a signal to the Stress control mould respectively
Block；
The pressure control module controls the exhaust air rate of the smoke exhaust fan according to pressure difference.
There is the selection scheme of three kinds of pressure differences on signal selector：A kind of preferable scheme, the pressure difference be the area of high temperature three with
The pressure difference value of preheating zone.Another preferable scheme, the pressure difference are the pressure difference value of the area of high temperature two and preheating zone.Another
Preferable scheme, the pressure difference are the pressure difference value of the area of high temperature one and preheating zone.
As preferable scheme, method of the invention also includes step：
The desired temperature of the rotary hearth furnace regional is inputted on the temperature control modules；
The temperature control unit gathers the temperature value of the rotary hearth furnace regional, and sends a signal to the temperature
Control module；
The temperature control modules control the temperature of the temperature control unit adjustment rotary hearth furnace regional.
Rotary hearth furnace control system and method provided by the invention, not only realize the temperature control to rotary hearth furnace regional
System, and by control of the main controller to control climate unit and pressure control unit, to the atmosphere and flow of flue gas in burner hearth
Realize real-time control；It ensure that the reducing atmosphere of regional and pressure meet the requirement of production technology；Body of heater discharge
Flue gas meets environmental emission standard.
Brief description of the drawings
Fig. 1 is the schematic diagram of temperature control unit of embodiment of the present invention preheating zone part；
Fig. 2 is the schematic diagram of control climate unit of the embodiment of the present invention；
Fig. 3 is the schematic diagram of pressure control unit of the embodiment of the present invention；
Fig. 4 is signal selector schematic diagram of the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and examples, the embodiment of the present invention is described in more details, so as to energy
The advantages of enough more fully understanding the solution of the present invention and its various aspects.However, specific embodiments described below and implementation
Example is for illustrative purposes only, rather than limitation of the present invention.
Heretofore described " connection ", unless otherwise clear and definite regulation or limit, should broadly understood, can be direct
It is connected or is connected by intermediary；Can be mechanical connection or electrical connection.
The embodiment of the present invention provides a kind of control system of rotary hearth furnace, the control for rotary hearth furnace production.The control system
Including main controller, temperature control unit, control climate unit, pressure control unit, realize to temperature, also Primordial Qi in rotary hearth furnace
The control of atmosphere, pressure.
As shown in figure 1, the inner chamber of rotary hearth furnace, according to the rotational programme of material, is divided into loading area TT-00, preheating zone
TT-01, middle warm area TT-02, the area TT-03 of high temperature one, the area TT-04 of high temperature two, the area TT-05 of high temperature three, cooling zone TT-06 and discharging
Area TT-07.Material enters rotary hearth furnace by loading area TT-00, after stove internal rotation is heated and reacted, is arranged by discharge zone TT-07
Go out rotary hearth furnace.
Main controller coordinates with temperature control unit, and the temperature of regional in stove is controlled.Temperature control unit bag
Include temperature measuring instrument, burnt gas valve, air door.Main controller includes temperature control modules, and temperature control modules are handed over for temperature
Pitch amplitude limit control loop.The input signal of Temperature cross-over amplitude limit control loop includes furnace temperature signal, gas flow signal, air stream
Signal is measured, output signal includes burnt gas valve control signal, air door control signal.
By taking the TT-01 of preheating zone as an example, the Temperature cross-over amplitude limit control loop of preheating zone part is controlled with preheating zone furnace temperature PID
Device TIC01 is major loop, using gas flow PID controller FIC01 and air flow controller FIC02 as subloop.Temperature control
The temperature measuring instrument of the preheating zone part of unit processed can detect preheating zone TT-01 temperature, and temperature control modules are according to preheating
The burnt gas valve and air door of area TT-01 temperature control temperature control unit, realize the regulation to preheating zone temperature.
Temperature cross-over amplitude limit control loop is well known to those skilled in the art, and will not be described in detail herein.With preheating zone TT-01
Identical, middle warm area TT-02, the area TT-03 of high temperature one, the area TT-04 of high temperature two, the area TT-05 of high temperature three temperature are by corresponding temperature
Spend the control of cross limiting range control loop.Wherein, in the embodiment of the present invention, preheating zone TT-01, middle warm area TT-02 temperature control
Between 1100~1200 DEG C；The area TT-03 of high temperature one, the area TT-04 of high temperature two, the area TT-05 of high temperature three temperature control are 1200
Between~1300 DEG C.Air correction coefficient is 0.8~1.0, and the value of limiting figure is specific according to production between 0.02~0.05
Adjustment.
As shown in Fig. 2 in order to realize the control to reducing atmosphere in rotary hearth furnace, the present embodiment is provided with gas in main controller
Atmosphere control module, control climate module include preheating zone atmosphere controller AIC01 and middle warm area atmosphere controller AIC02, preheating
Area atmosphere controller AIC01 and middle warm area atmosphere controller AIC02 is PID controller.
Control climate unit includes：Air-valve FV01 is mended in preheating zone, middle warm area mends air-valve FV02, positioned at the preheating zone of preheating zone
Gas analyzer AT01, the middle warm area gas analyzer AT02 positioned at middle warm area.Preheating zone gas analyzer AT01 and middle warm area
Gas analyzer AT02 is bleeder on-line gas analysis instrument, can detect the CO contents in atmosphere.
Preheating zone gas analyzer AT01 connections preheating zone atmosphere controller AIC01, preheating zone atmosphere controller AIC01 are controlled
Air-valve FV01 aperture is mended in preheating zone processed, and the secondary air channel of air-valve FV01 connections preheating zone is mended in preheating zone.Preheating zone gas analyzer
AT01 detects the CO contents of preheating zone, and sends a signal to preheating zone atmosphere controller AIC01, preheating zone atmosphere controller
AIC01 judges the height of CO contents in the TT-01 of preheating zone, controls preheating zone to mend air-valve FV01 with this according to initial setting value
The size of aperture, adjust the benefit air quantity of preheating zone.Preferably, the setting value of the preheating zone CO contents of the present embodiment is preheating zone cigarette
20~50ppm (parts per million) of gas discharge standard requirement.
Warm area atmosphere controller AIC02 in middle warm area gas analyzer AT02 connections, middle warm area atmosphere controller AIC02 controls
Warm area mends air-valve FV02 aperture in system, and middle warm area mends the secondary air channel of warm area in air-valve FV02 connections.Middle warm area gas analyzer
The CO contents of warm area in AT02 detections, and send a signal to middle warm area atmosphere controller AIC02, middle warm area atmosphere controller
AIC02 according to initial setting value, in judgement in warm area TT-02 CO contents height, mend air-valve FV02's with warm area in control
Aperture size, so as to the benefit air quantity of warm area in adjusting.The setting value of the middle warm area CO contents of preferable the present embodiment is preheating zone
0.5~35000ppm of standard limit of smog release requirement.
Control climate module and control climate unit matching, the target controlled in real time is used as using the CO contents in atmosphere.With
Preheating zone CO contents setting value is 20, exemplified by middle warm area CO contents setting value 30000, CO contents in central warm area reducing atmosphere
When low, the benefit air quantity of warm area in reduction, ensure that the concentration of reducing atmosphere meets technological requirement；In central warm area reducing atmosphere
When CO contents are high, the benefit air quantity of warm area in increase, promote CO abundant burning.Preheating zone monitors CO contents, control preheating in real time
The intake of air-valve is mended in area, is ensured the unnecessary CO in preheating zone all to burn up, the CO contents of preheating zone is reached setting value, discharge
The flue gas gone out meets environmental emission standard.
The heating furnace preheating zone, middle warm area, the area of high temperature one, the area of high temperature two, the area of high temperature three are respectively mounted the online gas of bleeder
Analyzer and sensor, and secondary air channel line is introduced in preheating zone and middle warm area, distinguished according to each heating zone atmosphere content
The aperture of air-valve is mended in control, so as to control atmosphere CO content.
As shown in figure 3, the control system of the embodiment of the present invention can also realize the control to furnace pressure so that be presented in stove
One stable ladder pressure field.Main controller includes pressure control module PIC01, and pressure control unit is included positioned at preheating zone
Preheating zone pressure sensor PT01, the middle warm area pressure sensor PT02 positioned at middle warm area, positioned at the area of high temperature one in the area of high temperature one
Pressure sensor PT03, the area pressure sensor PT04 of high temperature two positioned at the area of high temperature two, the pressure of the area of high temperature three positioned at the area of high temperature three
The force snesor PT05 and smoke exhaust fan PY01 of connection preheating zone；Preheating zone pressure sensor PT01, middle warm area pressure sensor
Area pressure sensor PT05 points of PT02, the area pressure sensor PT03 of high temperature one, the area pressure sensor PT04 of high temperature two and high temperature three
Not Jian Ce region gas pressure, and send a signal to pressure control module PIC01, pressure control module PIC01 controls
Smoke exhaust fan PY01 processed exhaust air rate., can be in smoke exhaust fan PY01 and preheating zone in order to be more accurately controlled to exhaust air rate
Connecting line on exhaust valve PV01 is set, exhaust valve PV01 aperture is controlled by pressure control module PIC01, realizes air draft
The control of amount.
Pressure control module PIC01 coordinates with pressure control unit so that the pressure in stove is distributed into gradient.Preheating zone is
Negative pressure, middle warm area are tiny structure, and the area of high temperature one is pressure-fired, and the area of high temperature two is malleation, and the area of high temperature three is pressure-fired, such
Under one stable ladder pressure field, flue gas is flowed at the high pressure of high-temperature region at the low pressure of preheating zone, then passes through smoke exhaust fan
Discharge, while prevent the poison gas rich in CO from being overflowed from tapping side.
As shown in figure 4, pressure control module PIC01 is according to the pressure difference of each high-temperature region and preheating zone (pressure difference value), it is right
Smoke exhaust fan PY01 is controlled.Using the area TT-05 of high temperature three pressure and preheating zone TT-01 pressure difference values as Δ P1, with high temperature
Two area's TT-04 pressure and preheating zone TT-01 pressure difference values are Δ P2, with the area's TT-03 pressure of high temperature one and preheating zone TT-01 pressure
Difference is Δ P3.In order to select different pressure differences, the setting signal selector in pressure control module PIC01, operation
Personnel can be as needed, selects required pressure difference to be configured on signal selector.In other words, signal selector is provided with
Δ P1, Δ P2, Δ P3, operating personnel can be selected according to operating mode between three.
The gas pressure of warm area, can be used as reference, turn bottom for auxiliary adjustment in middle warm area pressure sensor PT02 detections
The pressure of stove.
On the other hand, the embodiment of the present invention provides a kind of using above-mentioned control system, the method for controlling rotary hearth furnace, including control
The step of Deoxidation Atmosphere in Furnace processed：
1st, preheating zone and the CO of middle warm area is set to contain respectively on preheating zone atmosphere controller and middle warm area atmosphere controller
Measure setting value.
2nd, preheating zone gas analyzer collection preheating zone CO content, and preheating zone atmosphere controller is sent a signal to,
Warm area CO content in middle warm area gas analyzer collection, and send a signal to middle warm area atmosphere controller.
3rd, for preheating zone atmosphere controller according to the CO content setting values of preheating zone, air-valve, adjustment preheating are mended in control preheating zone
The benefit air quantity in area, ensure the unnecessary CO completely burneds of preheating zone so that the flue gas of discharge meets environmental protection standard；Preferably, preheat
The setting value of area's CO contents is 20~50ppm of preheating zone fume emission requirement.
4th, the CO content setting values of middle warm area atmosphere controller warm area in, warm area mends warm area in air-valve adjustment in control
Benefit air quantity；Preferably, the setting value of middle warm area CO contents is 0.5~35000ppm of preheating zone fume emission requirement；It is central
When the CO contents of warm area are too low, the aperture of warm area benefit air-valve diminishes in middle warm area atmosphere controller control, the benefit of warm area in reduction
Air quantity so that the CO contents of middle warm area rise；During the CO too high levels of central warm area, warm area in middle warm area atmosphere controller control
The aperture for mending air-valve becomes big, and the benefit air quantity of warm area, increases CO burning in increase.
The control method of the rotary hearth furnace of the present embodiment also includes the step of furnace pressure control：
1st, the pressure difference needed for being selected by signal selector, sets pressure differential resetting value, pressure difference can on pressure control module
To be the pressure difference value Δ P1 or the pressure difference value Δ P2 of the area of high temperature two and preheating zone in the area of high temperature three and preheating zone, go back
Can be the pressure difference value Δ P3 of the area of high temperature one and preheating zone.
2nd, preheating zone pressure sensor, middle warm area pressure sensor, the area's pressure sensor of high temperature one, the area's pressure of high temperature two pass
Sensor, the area's pressure sensor of high temperature three gather the pressure of region, and send a signal to pressure control module respectively.
3rd, pressure control module controls the air draft of smoke exhaust fan according to the relation between actual pressure differential and pressure differential resetting value
Amount；When actual pressure differential is more than pressure differential resetting value, the exhaust air rate of smoke exhaust fan is controlled to diminish；When actual pressure differential is less than pressure differential resetting
During value, control the air draft quantitative change of smoke exhaust fan big；Target is to ensure that pressure in the burner hearth is distributed in ladder.
By the Stress control of rotary hearth furnace, pressure in the burner hearth is set to keep balance, the discharge of flue gas smooth flow.In heating zone gas
In the case of atmosphere content is normal, pressure in the burner hearth is declined from high-temperature region to preheating zone pressure steps formula is stable, make flue gas from height
Warm area uniformly flows through low-temperature space discharge.
When central warm area pressure sensor detects that middle warm area pressure is excessive, operating personnel, suitably modified pressure difference can be prompted
Set, with the pressure in auxiliary adjustment stove.
The rotary hearth furnace control method of the embodiment of the present invention also includes the step of control rotary hearth furnace temperature：
1st, the desired temperature of rotary hearth furnace regional is inputted on temperature control modules.
2nd, the temperature value of temperature control unit collection rotary hearth furnace regional, and send a signal to temperature control modules.
3rd, the temperature of temperature control modules control temperature control unit adjustment rotary hearth furnace regional, the temperature of regional is made
Degree meets desired temperature.
What the dotted line in figure represented is the signal connection between each controller and control unit.
It should be noted that each embodiment above by reference to described by accompanying drawing only limits this to illustrate rather than
The scope of invention, it will be understood by those within the art that, it is right under the premise without departing from the spirit and scope of the present invention
The modification or equivalent substitution that the present invention is carried out, all should cover within the scope of the present invention.It is in addition, signified unless the context
Outside, the word occurred in the singular includes plural form, and vice versa.In addition, unless stated otherwise, then any embodiment
All or part of can combine any other embodiment all or part of use.
Claims (10)
1. a kind of control system of rotary hearth furnace, the rotary hearth furnace includes preheating zone, middle warm area, the area of high temperature one, the area of high temperature two and height
Wen Sanqu, the control system include main controller, it is characterised in that also including control climate unit；
The main controller includes control climate module, and the control climate module includes preheating zone atmosphere controller and middle warm area gas
Atmosphere controller；
The control climate unit includes：Air-valve is mended in preheating zone, middle warm area mends air-valve, the preheating zone gas analysis positioned at preheating zone
Instrument, the middle warm area gas analyzer positioned at middle warm area；
The preheating zone gas analyzer connects the preheating zone atmosphere controller, described in the preheating zone atmosphere controller control
The aperture of air-valve is mended in preheating zone, and the secondary air channel that air-valve connects the preheating zone, the middle warm area gas analysis are mended in the preheating zone
Instrument connects the middle warm area atmosphere controller, and the middle warm area atmosphere controller control middle warm area mends the aperture of air-valve, institute
State middle warm area and mend the secondary air channel that air-valve connects the middle warm area.
2. control system according to claim 1, it is characterised in that the main controller also includes pressure control module, institute
Stating pressure control module includes signal selector；
The control system also includes pressure control unit, and the pressure control unit includes the preheating zone pressure positioned at preheating zone
Sensor, the middle warm area pressure sensor positioned at middle warm area, the area's pressure sensor of high temperature one positioned at the area of high temperature one, positioned at high temperature
The area's pressure sensor of high temperature two, the area's pressure sensor of high temperature three positioned at the area of high temperature three and the Smoke for connecting preheating zone in 2 area
Machine；
The preheating zone pressure sensor, middle warm area pressure sensor, the area's pressure sensor of high temperature one, the area's pressure sensing of high temperature two
Device connects the pressure control module with the area's pressure sensor of high temperature three, and the pressure control module controls the smoke exhaust fan
Exhaust air rate.
3. control system according to claim 1, it is characterised in that the main controller also includes temperature control modules, institute
Stating control system also includes temperature control unit, and the temperature control modules control turns bottom described in the temperature control unit adjustment
Temperature in stove.
4. one kind utilizes any control system of claims 1 to 33, the method for controlling rotary hearth furnace, it is characterised in that including step
Suddenly：
The CO contents of preheating zone and middle warm area are set respectively on the preheating zone atmosphere controller and middle warm area atmosphere controller
Setting value；
The content of the preheating zone gas analyzer collection preheating zone CO, and send a signal to the preheating zone control climate
Device, warm area CO content in the middle warm area gas analyzer collection, and send a signal to middle warm area atmosphere controller；
The preheating zone atmosphere controller controls the preheating zone to mend air-valve adjustment preheating according to the CO content setting values of preheating zone
The benefit air quantity in area；
The CO content setting values of middle warm area atmosphere controller warm area in, the control middle warm area mend air-valve adjustment medium temperature
The benefit air quantity in area.
5. according to the method for claim 4, it is characterised in that when the CO contents of the middle warm area are too low, the middle warm area
The aperture that the atmosphere controller control middle warm area mends air-valve diminishes, the benefit air quantity of warm area in reduction；The CO of the middle warm area contains
When measuring too high, the aperture that the middle warm area atmosphere controller control middle warm area mends air-valve becomes big, the benefit wind of warm area in increase
Amount.
6. according to the method for claim 4, it is characterised in that also including step：
Pressure differential resetting value is set on the pressure control module by the signal selector；
The preheating zone pressure sensor, middle warm area pressure sensor, the area's pressure sensor of high temperature one, the area's pressure sensing of high temperature two
Device, the area's pressure sensor of high temperature three gather the pressure of region, and send a signal to the pressure control module respectively；
The pressure control module controls the exhaust air rate of the smoke exhaust fan according to pressure difference.
7. according to the method for claim 6, it is characterised in that the pressure difference is the pressure differential of the area of high temperature three and preheating zone
Value.
8. according to the method for claim 6, it is characterised in that the pressure difference is the pressure differential of the area of high temperature two and preheating zone
Value.
9. according to the method for claim 6, it is characterised in that the pressure difference is the pressure differential of the area of high temperature one and preheating zone
Value.
10. according to the method for claim 4, it is characterised in that also including step：
The desired temperature of the rotary hearth furnace regional is inputted on the temperature control modules；
The temperature control unit gathers the temperature value of the rotary hearth furnace regional, and sends a signal to the temperature control
Module；
The temperature control modules control the temperature of the temperature control unit adjustment rotary hearth furnace regional.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| 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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