CN106642125A - Temperature control method and device for regenerative radiant tube - Google Patents
Temperature control method and device for regenerative radiant tube Download PDFInfo
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- CN106642125A CN106642125A CN201611104979.2A CN201611104979A CN106642125A CN 106642125 A CN106642125 A CN 106642125A CN 201611104979 A CN201611104979 A CN 201611104979A CN 106642125 A CN106642125 A CN 106642125A
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- temperature
- radiant tube
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- temperature detecting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/60—Devices for simultaneous control of gas and combustion air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2208/00—Control devices associated with burners
- F23D2208/005—Controlling air supply in radiant gas burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/14—Special features of gas burners
- F23D2900/1412—Special features of gas burners for radiant burners
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
The invention discloses a temperature control method and device for a regenerative radiant tube. The method comprises the steps as follows: the temperature of the radiant tube is collected; whether gas is cut off is judged; and if the gas is cut off, proportion-differential control is performed on the opening degree of a gas control valve and the opening degree of an air regulating valve according to the temperature of the radiant tube and the target temperature. With the method, the bad effect of proportion-integral-derivative (PID) control on the system can be eliminated, the control accuracy can be improved, the burning efficiency of the radiant tube can be improved, the operation stability of the system can be effectively guaranteed, and the reliability of equipment can be further guaranteed.
Description
Technical field
The present invention relates to radiant tube technical field, the temperature-controlled process and dress of more particularly to a kind of heat accumulation type radiant tube
Put.
Background technology
Correlation technique, the temperature controlled core of heat accumulation type radiant tube is stable control gas control valve and air adjustment
Valve, such as passes through PID (proportion, integral, derivative, ratio, integration, derivative) control realization.
However, the integral element of PID is mainly used in eliminating static difference, but the dynamic property to system has harmful effect.For example,
When starting end or increasing considerably or reduce, short time system has very big output, but due to the effect of integration accumulation, leads
Controlled quentity controlled variable time-out is caused, such executing agency may run the limit controlled quentity controlled variable of maximum actuation scope, so as to cause system larger
Overshoot, or even the larger concussion of system can be caused, reduce the degree of accuracy of control.
In addition, in the industrial furnace of heat accumulation type radiant tube, because uneven and air-fuel ratio of being heated configures the reason such as improper, once in a while
Radiant tube can be caused to burn, and then cause production accident.But, in the related, it is considered that the surface temperature of radiant tube
There is 50 DEG C～100 DEG C of the temperature difference, due to there is situation about varying using middle, cause actual emanations pipe to exist higher
The temperature of any one position is all unable to the situation of whole radiant tube of real reaction in the temperature difference, therefore radiant tube, if only arranging one
Individual temperature detecting point, is easily caused overtemperature alarm and misses and judge overtemperature time point, and then produces failure, especially U-shaped radiant tube and W
Type radiant tube, it is impossible to stability and reliability is effectively ensured.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.
For this purpose, it is an object of the present invention to proposing a kind of temperature-controlled process of heat accumulation type radiant tube, the method can
To eliminate harmful effect of the PID control to system, the degree of accuracy of control is improved.
Further object is that proposing a kind of temperature control equipment of heat accumulation type radiant tube.
To reach above-mentioned purpose, one aspect of the present invention embodiment proposes a kind of temperature control side of heat accumulation type radiant tube
Method, comprises the following steps：The temperature of collection radiant tube；Judge whether combustion gas is cut off；If it is, according to the temperature of the radiant tube
Degree and target temperature carry out ratio, differential control to the aperture of gas control valve and air control valve.
The temperature-controlled process of the heat accumulation type radiant tube of the embodiment of the present invention, when combustion gas is cut off, can be according to radiation
The temperature and target temperature of pipe carries out ratio, differential control to the aperture of gas control valve and air control valve, so as to eliminate PID
Harmful effect of the control to system, improves the degree of accuracy of control, improves the efficiency of combustion of radiant tube, and the operation of system is effectively ensured
Stability, is further ensured that the reliability of equipment.
Further, in one embodiment of the invention, the temperature of the collection radiant tube, further includes：Detection
The temperature of multiple temperature detecting points on the radiant tube；If detection knows that the temperature of the plurality of temperature detecting point meets default bar
Part, then obtain the temperature of the radiant tube according to the temperature and corresponding preset weights of the plurality of temperature detecting point.
Further, in one embodiment of the invention, the radiant tube includes the first heat storage and the second heat storage,
Wherein, the plurality of temperature detecting point at least includes the first temperature detecting point, second temperature test point and the 3rd temperature detecting point,
First temperature detecting point is the intermediate point of the radiant tube, and the second temperature test point is the intermediate point of the radiant tube
And the thermal self-restraint stress between first heat storage, the 3rd temperature detecting point is the intermediate point of the radiant tube and described
Thermal self-restraint stress between second heat storage.
Further, in one embodiment of the invention, multiple temperature detecting points on the detection radiant tube
Temperature after, also include：If the temperature of any one is more than the first preset temperature value in the plurality of temperature detecting point,
Report to the police, and continue time of fire alarming and be more than the first preset time value, then cut off combustion gas；Or, if the plurality of temperature detection
The temperature of any one is more than the second preset temperature value in point, then cut off the combustion gas, wherein, second preset temperature value is big
In first preset temperature value；Or, if changing value of the temperature of the plurality of temperature detecting point in Preset Time is big
In predetermined threshold value, then report to the police.
Further, in one embodiment of the invention, ratio, differential control are carried out according to below equation：
Wherein, Tβ=0To integrate disengaging time, and in the fuel gas shutoff, Tβ=0When turning off for the gas control valve
Between, β is integral coefficient, wherein, in Tβ=0In time, β is equal to 0, and otherwise β is the sampling time equal to 1, T.
To reach above-mentioned purpose, another aspect of the present invention embodiment proposes a kind of temperature control dress of heat accumulation type radiant tube
Put, adopt with the aforedescribed process, wherein, device includes：Acquisition module, for gathering the temperature of radiant tube；Judge module, for sentencing
Whether disconnected combustion gas is cut off；Control module, when fuel gas shutoff, for according to the temperature and target temperature of the radiant tube to combustion gas
The aperture of control valve and air control valve carries out ratio, differential control.
The temperature control equipment of the heat accumulation type radiant tube of the embodiment of the present invention, when combustion gas is cut off, can be according to radiation
The temperature and target temperature of pipe carries out ratio, differential control to the aperture of gas control valve and air control valve, so as to eliminate PID
Harmful effect of the control to system, improves the degree of accuracy of control, improves the efficiency of combustion of radiant tube, and the operation of system is effectively ensured
Stability, is further ensured that the reliability of equipment.
Further, in one embodiment of the invention, the acquisition module includes：Detector unit, for detecting
State the temperature of multiple temperature detecting points on radiant tube；Acquiring unit, when detection knows that the temperature of the plurality of temperature detecting point expires
When foot is pre-conditioned, for obtaining the radiant tube according to the temperature of the plurality of temperature detecting point and corresponding preset weights
Temperature.
Further, in one embodiment of the invention, the radiant tube includes the first heat storage and the second heat storage,
Wherein, the plurality of temperature detecting point at least includes the first temperature detecting point, second temperature test point and the 3rd temperature detecting point,
First temperature detecting point is the intermediate point of the radiant tube, and the second temperature test point is the intermediate point of the radiant tube
And the thermal self-restraint stress between first heat storage, the 3rd temperature detecting point is the intermediate point of the radiant tube and described
Thermal self-restraint stress between second heat storage.
Further, in one embodiment of the invention, said apparatus also include：Alarm and protection module, in the inspection
Survey on the radiant tube after the temperature of multiple temperature detecting points, when the temperature of any one in the plurality of temperature detecting point it is big
When the first preset temperature value, for reporting to the police, and continue time of fire alarming more than the first preset time value, cut off combustion gas；Or,
When the temperature of any one in the plurality of temperature detecting point is more than the second preset temperature value, the combustion gas is cut off, wherein, institute
The second preset temperature value is stated more than first preset temperature value；Or, when the temperature of the plurality of temperature detecting point is default
Changing value in time is more than predetermined threshold value, reports to the police.
Further, in one embodiment of the invention, ratio, differential control are carried out according to below equation：
Wherein, Tβ=0To integrate disengaging time, and in the fuel gas shutoff, Tβ=0When turning off for the gas control valve
Between, β is integral coefficient, wherein, in Tβ=0In time, β is equal to 0, and otherwise β is the sampling time equal to 1, T.
The additional aspect of the present invention and advantage will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Description of the drawings
The above-mentioned and/or additional aspect of the present invention and advantage will become from the following description of the accompanying drawings of embodiments
It is substantially and easy to understand, wherein：
Fig. 1 is the structural representation of the temperature control system of the heat accumulation type radiant tube according to one embodiment of the invention；
Fig. 2 is the flow chart of the temperature-controlled process of the heat accumulation type radiant tube according to the embodiment of the present invention；
Fig. 3 is the flow chart of the temperature-controlled process of the heat accumulation type radiant tube according to one embodiment of the invention；
Fig. 4 is the structural representation of the temperature control equipment of the heat accumulation type radiant tube according to the embodiment of the present invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
Below before the temperature-controlled process and device of the heat accumulation type radiant tube that description is proposed according to embodiments of the present invention,
The importance of the temperature for accurately controlling heat accumulation type radiant tube is briefly described first.
At present, heat accumulation type radiant tube is widely used in industrial heating furnace as heating source, heat accumulation type radiant tube burning system
The combustion system of system is such as：The heat storage heating of cold air elder generation Jing A burners first, it burns with combustion gas mixing, secondly by radiant tube
In heat smoke realize heating, and Jing after the heat storage of B burners discharge, wherein, through setting time after, by special service valve
Gate control is realizing the break-make of air, the conversion of heat smoke flow direction and combustion gas, and cold air is flowed into by B burners, and
And heat smoke is discharged after the heat storage of A burners.Cold air and heat smoke so alternately flow through the storage of A burners and B burners
Hot body, and then by heat storage heat-shift, air can be preheating to close radiant tube tube wall temperature, i.e., dropped by flue-gas temperature
It is low, realize the recovery of flue gas heat.
Wherein, the temperature control of radiant tube is controlled using general PID temperature, a temperature is set such as on radiant tube
Test point, therefore the radiant tube temperature for gathering only arranges an overtemperature alarm, with the combustion gas for directly stopping radiant tube after overtemperature
Stop valve.
However, there is following defect in correlation technique：
1) not according to heat accumulation type radiant tube the characteristics of be designed, i.e., due to integration accumulation effect, cause controlled quentity controlled variable surpass
When, executing agency may run the limit controlled quentity controlled variable of maximum actuation scope, cause the overshoot that system is larger, or even cause system compared with
Big concussion, causes control deviation occur, falls flat.
2), the temperature for radiating pipe surface is not uniform, if only arranging a point for measuring temperature, it is impossible to while reflecting radiant tube
The situation of two burners, and measuring point is placed on into the centre position of radiant tube, then the peak of radiant tube temperature will not be measured,
Failure is produced so as to miss the situation for judging actual overtemperature, particularly U-shaped radiant tube, W type radiant tubes.
It is of the invention to be formally based on the problems referred to above, and propose the temperature-controlled process and device of a kind of heat accumulation type radiant tube.
Fig. 1 is the structural representation of the temperature control system of the heat accumulation type radiant tube of one embodiment of the invention.
It should be noted that the following part of the present invention is by taking the system shown in Fig. 1 as an example, by the temperature to heat accumulation type radiant tube
Degree control describes in detail.Although following examples are in scheme as a example by radiant tube, skilled artisan would appreciate that
, for similar radiant tube can be configured by following similar mode.
As shown in figure 1, the system includes：Air blast 1, pressure transmitter 2, air mass flow transmitter 3, air control valve 4,
Air flue gas commutation cross valve 5, igniting blower fan 6, gas flow transmitter 7, gas control valve 8, gas cut off valve 9, heat accumulating type
Radiant tube 10, thermometric galvanic couple 11, smoke regulating valve 12 and air-introduced machine 13.
Specifically, heat accumulation type radiant tube 10 includes A burners and B burners.Air flue gas commutation cross valve 5 is used to commutate, and fires
Gas stop valve 9 controls fuel gas buring.The heat storage of A burners and B burners to accumulation of heat, wherein, A burners and B burners are in radiant tube
Normal combustion is kept during 10 working condition, both sides ignition flame can be respectively monitored by two flame monitoring instrument.
Further, flow sensor can be provided with radiant tube gas pipeline and controls to provide combustion gas to radiant tube 10
Gas control valve 8, in the same manner air duct be provided with flow sensor and control to radiant tube 10 provide air air control valve
4, so as to pass through to control the open degree of gas control valve 9 and air control valve 4, realize combustion gas and sky of the control for radiant tube burning
The purpose of the flow of gas.
Further, at least three temperature thermocouples 11 can be provided with radiant tube 10 with measurement temperature, wherein it is possible to logical
Analog simulation and experiment actual measurement comprehensive analysis are crossed, is arranged on radiation pipe surface rational position, be will be described in detail below.
In addition, radiant tube 10 can be provided with air pressure probe, gaseous-pressure sensor, flue gas pressures sensor and control
The smoke regulating valve 12 of tobacco curing atmospheric pressure, so as to smoke regulating valve 12 can adjust the pressure of flue according to setting, it is ensured that
Radiation combustion inner pipe is in optimal pressure limit.
It should be noted that the structure of radiant tube is only illustrative in the Fig. 1, it is a kind of that the present invention is not limited in this
Radiation tubular construction.
The temperature-controlled process and dress of the heat accumulation type radiant tube for proposing according to embodiments of the present invention are described with reference to the accompanying drawings
Put, describe the temperature-controlled process of the heat accumulation type radiant tube for proposing according to embodiments of the present invention with reference to the accompanying drawings first.
Fig. 2 is the flow chart of the temperature-controlled process of the heat accumulation type radiant tube of the embodiment of the present invention.
As shown in Fig. 2 the temperature-controlled process of the heat accumulation type radiant tube is comprised the following steps：
In step s 201, the temperature of radiant tube is gathered.
The mode of the temperature of collection radiant tube can have many kinds, temperature thermocouple measurement temperature as escribed above, here
It is not specifically limited.
Wherein, in one embodiment of the invention, the temperature of radiant tube is gathered, is further included：On detection radiant tube
The temperature of multiple temperature detecting points；If detection knows that the temperature of multiple temperature detecting points meets pre-conditioned, according to multiple temperature
The temperature and corresponding preset weights of degree test point obtain the temperature of radiant tube.
It is understood that the temperature on the surface of radiant tube is not uniform, in order to preferably feed back the current of radiant tube
State, the embodiment of the present invention can measure temperature by multiple temperature detecting points, wherein, temperature detecting point can be arranged in spoke
Penetrate on pipe surface rational position, wherein, position can not made to have by analog simulation and experiment actual measurement comprehensive analysis, here
Body is limited.It should be noted that preset weights can be configured according to actual conditions, such as weights can be according to radiant tube technique
Different values are set, its weights 0 can be set to when there is temperature thermocouple failure, so as to the impact produced to system can drop
It is low to minimum level.
In addition, if the temperature of multiple temperature detecting point detections meets certain condition, then mean value is weighted, i.e., averagely
Calculating can not be simple arithmetic mean of instantaneous value, it is necessary to be weighted average；If the temperature of multiple temperature detecting point detections is discontented with
Sufficient certain condition, then reported to the police, and be will be described in detail below.
Further, in one embodiment of the invention, radiant tube includes the first heat storage and the second heat storage, its
In, multiple temperature detecting points at least include the first temperature detecting point, second temperature test point and the 3rd temperature detecting point, and first is warm
Degree test point is the intermediate point of radiant tube, and second temperature test point is the temperature between the intermediate point and the first heat storage of radiant tube
Peak, the 3rd temperature detecting point is the thermal self-restraint stress between the intermediate point and the second heat storage of radiant tube.
It is understood that in the temperature detecting point of radiant tube surface layout at least three, including the intermediate point of radiant tube with
And two thermal self-restraint stress between heat storage and intermediate point,
For example, first have to process the temperature data of temperature detecting point collection, the measurement of such as three thermocouples
Value is respectively T1、T2、T3, and the weights of the temperature value of three thermocouple measurements are respectively ω1、ω2、ω3, wherein, ω1、ω2、
ω3Peak, radiant tube centre position, the peak of radiant tube right side temperature of radiant tube left side temperature are measured respectively.Need
Illustrate, due to ω1And ω3The position that measurement radiant tube heats up, therefore temperature value easily rising and reduction, and ω2It is relatively steady
It is fixed, so ω2It is higher than ω1And ω3.Say, the temperature of radiant tube is：
In addition, radiant tube can be used in heating furnace as heating source, therefore can gather the temperature of heating furnace, so as to incite somebody to action
The temperature of heating furnace also serves as important sources weights in addition, effectively improves the degree of accuracy of control.
In step S202, judge whether combustion gas is cut off.
It should be noted that the commutating characteristics of heat accumulation type radiant tube are directed to, and before and after commutation is alternate in the short time, combustion
Gas stop valve is not opened, and the PID integratings of commutating period need to treat with a certain discrimination, are not burnt and unstable combustion in this section
In the fixed time period, PID is calculated and is not integrated computing, so that radiant tube burning keeps as far as possible stable.
In step S203, if it is, being adjusted to gas control valve and air according to the temperature and target temperature of radiant tube
The aperture of section valve carries out ratio, differential control.
Further, in one embodiment of the invention, ratio, differential control are carried out according to below equation：
Wherein, Tβ=0To integrate disengaging time, and in fuel gas shutoff, Tβ=0For the gas control valve turn-off time, β is product
Divide coefficient, wherein, in Tβ=0In time, β is equal to 0, and otherwise β is the sampling time equal to 1, T.
That is, when fuel gas shutoff, being adjusted to gas control valve and air according to the temperature and target temperature of radiant tube
The aperture of section valve carries out ratio, differential control, but when combustion gas is not cut off, according to the temperature and target temperature of radiant tube to combustion gas
The aperture of control valve and air control valve carries out ratio, differential, integration control, i.e. PID control.
Wherein, integral element is introduced in PID control, primarily to eliminating static difference, improves control accuracy, but combustion gas is cut
Separation is integrated when disconnected, i.e., when deviation is larger, cancels integral action, when the close set-point of controlled volume, be re-introduced into integration
Control, to reduce static difference.It is understood that the separated integrator PID algorithm at times of the embodiment of the present invention is specially：
Wherein, Tβ=0To integrate disengaging time, and in fuel gas shutoff, Tβ=0For the gas control valve turn-off time, β is product
Divide coefficient, wherein, in Tβ=0In time, β is equal to 0, and otherwise β is the sampling time equal to 1, T.
In an embodiment of the present invention, the PID temperature control of heat accumulation type radiant tube can need frequently to change according to radiant tube
To the characteristics of make corresponding adjustment, not only meet the needs of heating technique, and do not result in the waste of fuel, be provided simultaneously with drop
The features such as low burn consumption, process for stabilizing, improve product quality, reduction environmental pollution.
In addition, in one embodiment of the invention, as shown in figure 3, multiple temperature detecting points on detection radiant tube
After temperature, the control method of the embodiment of the present invention also includes：If the temperature of any one is more than in multiple temperature detecting points
First preset temperature value, then report to the police, and continues time of fire alarming more than the first preset time value, then cut off combustion gas；Or, if
The temperature of any one is more than the second preset temperature value in multiple temperature detecting points, then cut off combustion gas, wherein, the second preset temperature
Value is more than the first preset temperature value；Or, if changing value of the temperature of multiple temperature detecting points in Preset Time is more than pre-
If threshold value, then report to the police.
As shown in figure 3, at this to various alarm and protection guarantees using safety be temperature alarming process be described in detail.Need
It is noted that the first preset temperature value, the first preset time value, the second preset temperature value and predetermined threshold value can be by this areas
Technical staff is configured according to actual conditions.
For example, high temperature alarm is arranged to each temperature detecting point.Specifically, when measuring radiant tube temperature more than high temperature alarm
During setting value, report to the police immediately, and if radiant tube long-term work is under the operating mode, in fact it could happen that the situation that radiant tube burns,
Therefore high temperature alarm time delay is further set, if the overtemperature alarm duration exceedes time delay, combustion gas is controlled immediately
Stop valve cuts off combustion gas, and so as to stop the heating of radiant tube, radiant tube would not continue to heat up if only logical commutation combustion air,
Temperature-fall period is in equivalent to radiant tube.
Again for example, arrange superhigh temperature to each temperature detecting point to report to the police.Specifically, superhigh temperature alarm setting value is higher than high temperature
Alarm setting value, i.e., when radiant tube temperature is measured more than overtemperature alarm setting value, then burning can occur within a short period of time in radiant tube
Situation about wearing, so supplying heat source must be cut off in time, controls immediately gas cut off valve cut-out combustion gas, so as to stop adding for radiant tube
Heat, in the same manner, only then radiant tube would not continue to heat up logical commutation combustion air, make radiant tube start cooling.
Again for example, arrange instantaneous lifting/lowering temperature to each temperature detecting point to report to the police.Specifically, if all thermometrics of radiant tube
Sensor occurs rising gentle cooling in very short time simultaneously, then illustrate to occur in that larger fluctuation inside or outside radiant tube, sends out
Go out alarm signal, such that it is able to be judged by operating personnel and make next step process.
Again for example, various pressure, temperature, flow are transfinited and flame monitoring is reported to the police.Specifically, for pressure, temperature, stream
The data and flame monitoring feedback signal of the data transmitter collection of amount are judged, if it exceeds ceiling value or less than lower bound
Value, then send alarm signal, such that it is able to make different process according to type of alarm and the possible extent of injury.
The temperature-controlled process of heat accumulation type radiant tube according to embodiments of the present invention, when combustion gas is cut off, can basis
The temperature and target temperature of radiant tube carries out ratio, differential control to the aperture of gas control valve and air control valve, so as to disappear
Except harmful effect of the PID control to system, the degree of accuracy of control is improved, improve the efficiency of combustion of radiant tube, system is effectively ensured
Operation stability, be further ensured that the reliability of equipment, and can ensure that using safety, not only meet the need of control technique
Want, and do not result in the waste of fuel, possess the spies such as reduction burnup, process for stabilizing, improve product quality, reduction environmental pollution
Point, improves experience, simple easily to realize.
The temperature control equipment of the heat accumulation type radiant tube proposed according to embodiments of the present invention referring next to Description of Drawings.
Fig. 4 is the structural representation of the temperature control equipment of the heat accumulation type radiant tube of the embodiment of the present invention.
As shown in figure 4, the temperature control equipment 100 of the heat accumulation type radiant tube includes：Acquisition module 101, judge module 102
With control module 103.
Wherein, acquisition module 101 is used to gather the temperature of radiant tube.Judge module 102 is used to judge whether combustion gas is cut off.
When fuel gas shutoff, control module 103 is used for according to the temperature and target temperature of radiant tube to gas control valve and air adjustment
The aperture of valve carries out ratio, differential control.The temperature control equipment 100 of the embodiment of the present invention can eliminate PID control to system
Harmful effect, improve control the degree of accuracy, improve radiant tube efficiency of combustion, the operation stability of system is effectively ensured, enter
One step ensures the reliability of equipment.
Further, in one embodiment of the invention, acquisition module 101 includes：Detector unit and acquiring unit.
Wherein, detector unit is used to detect the temperature of multiple temperature detecting points on radiant tube.When multiple temperature are known in detection
When the temperature of test point meets pre-conditioned, acquiring unit is used for temperature and corresponding default power according to multiple temperature detecting points
It is worth to the temperature of radiant tube.
Further, in one embodiment of the invention, radiant tube includes the first heat storage and the second heat storage, its
In, multiple temperature detecting points at least include the first temperature detecting point, second temperature test point and the 3rd temperature detecting point, and first is warm
Degree test point is the intermediate point of radiant tube, and second temperature test point is the temperature between the intermediate point and the first heat storage of radiant tube
Peak, the 3rd temperature detecting point is the thermal self-restraint stress between the intermediate point and the second heat storage of radiant tube.
Further, in one embodiment of the invention, the device 100 of the embodiment of the present invention also includes：Alarm and protection
Module.Wherein, detection radiant tube on multiple temperature detecting points temperature after, when in multiple temperature detecting points any one
When temperature is more than the first preset temperature value, alarm and protection module is used to report to the police, and continue time of fire alarming it is default more than first when
Between be worth, cut off combustion gas.Or, when the temperature of any one in multiple temperature detecting points is more than the second preset temperature value, report to the police
Protection module cuts off combustion gas, wherein, the second preset temperature value is more than the first preset temperature value.Or, when multiple temperature detecting points
Changing value of the temperature in Preset Time be more than predetermined threshold value, alarm and protection module is reported to the police.
Further, in one embodiment of the invention, ratio, differential control are carried out according to below equation：
Wherein, Tβ=0To integrate disengaging time, and in fuel gas shutoff, Tβ=0For the gas control valve turn-off time, β is product
Divide coefficient, wherein, in Tβ=0In time, β is equal to 0, and otherwise β is the sampling time equal to 1, T.
It should be noted that the explanation of the aforementioned temperature-controlled process embodiment to heat accumulation type radiant tube is also applied for
The temperature control equipment of the heat accumulation type radiant tube of the embodiment, here is omitted.
The temperature control equipment of heat accumulation type radiant tube according to embodiments of the present invention, when combustion gas is cut off, can basis
The temperature and target temperature of radiant tube carries out ratio, differential control to the aperture of gas control valve and air control valve, so as to disappear
Except harmful effect of the PID control to system, the degree of accuracy of control is improved, improve the efficiency of combustion of radiant tube, system is effectively ensured
Operation stability, be further ensured that the reliability of equipment, and can ensure that using safety, not only meet the need of control technique
Want, and do not result in the waste of fuel, possess the spies such as reduction burnup, process for stabilizing, improve product quality, reduction environmental pollution
Point, improves experience, simple easily to realize.
In describing the invention, it is to be understood that term " " center ", " longitudinal direction ", " horizontal ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description, rather than indicates or imply that the device or element of indication must
With specific orientation, with specific azimuth configuration and operation, therefore must be not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or it is integral；Can be that machinery connects
Connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, unless otherwise clearly restriction.For one of ordinary skill in the art
For, can as the case may be understand above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be with
It is the first and second feature directly contacts, or the first and second features are by intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be with office
Combine in an appropriate manner in one or more embodiments or example.Additionally, in the case of not conflicting, the skill of this area
Art personnel can be tied the feature of the different embodiments or example described in this specification and different embodiments or example
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (10)
1. a kind of temperature-controlled process of heat accumulation type radiant tube, it is characterised in that comprise the following steps：
The temperature of collection radiant tube；
Judge whether combustion gas is cut off；And
If it is, being carried out to the aperture of gas control valve and air control valve according to the temperature and target temperature of the radiant tube
Ratio, differential control.
2. the temperature-controlled process of heat accumulation type radiant tube according to claim 1, it is characterised in that the collection radiant tube
Temperature, further include：
Detect the temperature of multiple temperature detecting points on the radiant tube；
If detection knows that the temperature of the plurality of temperature detecting point meets pre-conditioned, according to the plurality of temperature detecting point
Temperature and corresponding preset weights obtain the temperature of the radiant tube.
3. the temperature-controlled process of heat accumulation type radiant tube according to claim 2, it is characterised in that the radiant tube includes
First heat storage and the second heat storage, wherein,
The plurality of temperature detecting point at least includes the first temperature detecting point, second temperature test point and the 3rd temperature detecting point,
First temperature detecting point is the intermediate point of the radiant tube, and the second temperature test point is the intermediate point of the radiant tube
And the thermal self-restraint stress between first heat storage, the 3rd temperature detecting point is the intermediate point of the radiant tube and described
Thermal self-restraint stress between second heat storage.
4. the temperature-controlled process of heat accumulation type radiant tube according to claim 2, it is characterised in that described in the detection
On radiant tube after the temperature of multiple temperature detecting points, also include：
If the temperature of any one is more than the first preset temperature value in the plurality of temperature detecting point, report to the police, and continue
Time of fire alarming is more than the first preset time value, then cut off combustion gas；Or,
If the temperature of any one is more than the second preset temperature value in the plurality of temperature detecting point, the combustion gas is cut off,
Wherein, second preset temperature value is more than first preset temperature value；Or,
If changing value of the temperature of the plurality of temperature detecting point in Preset Time is more than predetermined threshold value, report to the police.
5. the temperature-controlled process of the heat accumulation type radiant tube according to any one of claim 1-4, it is characterised in that according to
Lower formula carries out ratio, differential control：
Wherein, Tβ=0To integrate disengaging time, and in the fuel gas shutoff, Tβ=0For the gas control valve turn-off time, β is
Integral coefficient, wherein, in Tβ=0In time, β is equal to 0, and otherwise β is the sampling time equal to 1, T.
6. a kind of temperature control equipment of heat accumulation type radiant tube, it is characterised in that using according to any one of claim 1-5
Method, wherein, device includes：
Acquisition module, for gathering the temperature of radiant tube；
Judge module, for judging whether combustion gas is cut off；And
Control module, when fuel gas shutoff, for according to the temperature and target temperature of the radiant tube to gas control valve and sky
The aperture of gas regulating valve carries out ratio, differential control.
7. the temperature control equipment of heat accumulation type radiant tube according to claim 6, it is characterised in that the acquisition module bag
Include：
Detector unit, for detecting the temperature of multiple temperature detecting points on the radiant tube；
Acquiring unit, when detecting that the temperature for knowing the plurality of temperature detecting point meets pre-conditioned, for according to described many
The temperature of individual temperature detecting point and corresponding preset weights obtain the temperature of the radiant tube.
8. the temperature control equipment of heat accumulation type radiant tube according to claim 7, it is characterised in that the radiant tube includes
First heat storage and the second heat storage, wherein,
The plurality of temperature detecting point at least includes the first temperature detecting point, second temperature test point and the 3rd temperature detecting point,
First temperature detecting point is the intermediate point of the radiant tube, and the second temperature test point is the intermediate point of the radiant tube
And the thermal self-restraint stress between first heat storage, the 3rd temperature detecting point is the intermediate point of the radiant tube and described
Thermal self-restraint stress between second heat storage.
9. the temperature control equipment of heat accumulation type radiant tube according to claim 7, it is characterised in that also include：
Alarm and protection module, detects on the radiant tube after the temperature of multiple temperature detecting points, when the plurality of temperature described
When the temperature of any one is more than the first preset temperature value in degree test point, for reporting to the police, and continue time of fire alarming more than the
One preset time value, cuts off combustion gas；Or, when the temperature of any one in the plurality of temperature detecting point is more than the second default temperature
During angle value, the combustion gas is cut off, wherein, second preset temperature value is more than first preset temperature value；Or, when described
Changing value of the temperature of multiple temperature detecting points in Preset Time is more than predetermined threshold value, reports to the police.
10. the temperature control equipment of the heat accumulation type radiant tube according to any one of claim 6-9, it is characterised in that according to
Below equation carries out ratio, differential control：
Wherein, Tβ=0To integrate disengaging time, and in the fuel gas shutoff, Tβ=0For the gas control valve turn-off time, β is
Integral coefficient, wherein, in Tβ=0In time, β is equal to 0, and otherwise β is the sampling time equal to 1, T.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611104979.2A CN106642125A (en) | 2016-12-05 | 2016-12-05 | Temperature control method and device for regenerative radiant tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611104979.2A CN106642125A (en) | 2016-12-05 | 2016-12-05 | Temperature control method and device for regenerative radiant tube |
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| CN106642125A true CN106642125A (en) | 2017-05-10 |
Family
ID=58819420
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611104979.2A Pending CN106642125A (en) | 2016-12-05 | 2016-12-05 | Temperature control method and device for regenerative radiant tube |
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| CN (1) | CN106642125A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI696800B (en) * | 2019-04-03 | 2020-06-21 | 大陸商上海頤柏科技股份有限公司 | Temperature control system with fuel gas radiant tube and method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0628769A1 (en) * | 1992-12-25 | 1994-12-14 | Kawasaki Seitetsu Kabushiki Kaisha | Heater including a plurality of heat accumulation type burner units and operation method therefor |
| CN101701533A (en) * | 2008-10-29 | 2010-05-05 | 华南理工大学 | Method and device for producing high temperature air for quick cooling of large turbine |
| CN202024356U (en) * | 2011-02-28 | 2011-11-02 | 上海安可科技有限公司 | Control device of heat accumulating type radiant tube burner |
| CN203007350U (en) * | 2012-12-20 | 2013-06-19 | 北京志能祥赢节能环保科技有限公司 | Oxygen-enriched-air heat-accumulating walking-beam heating furnace |
| CN203411586U (en) * | 2013-06-27 | 2014-01-29 | 首钢总公司 | Thermal load balance prewarning device for radiant tubes of continuous annealing furnace |
| CN104133506A (en) * | 2014-07-15 | 2014-11-05 | 中冶南方工程技术有限公司 | Heating furnace heating-section hearth temperature detection value calculating method |
| CN104976616A (en) * | 2015-08-05 | 2015-10-14 | 中国东方电气集团有限公司 | Low-calorific-value fuel gas and high-temperature air burning furnace with water wall |
-
2016
- 2016-12-05 CN CN201611104979.2A patent/CN106642125A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0628769A1 (en) * | 1992-12-25 | 1994-12-14 | Kawasaki Seitetsu Kabushiki Kaisha | Heater including a plurality of heat accumulation type burner units and operation method therefor |
| CN101701533A (en) * | 2008-10-29 | 2010-05-05 | 华南理工大学 | Method and device for producing high temperature air for quick cooling of large turbine |
| CN202024356U (en) * | 2011-02-28 | 2011-11-02 | 上海安可科技有限公司 | Control device of heat accumulating type radiant tube burner |
| CN203007350U (en) * | 2012-12-20 | 2013-06-19 | 北京志能祥赢节能环保科技有限公司 | Oxygen-enriched-air heat-accumulating walking-beam heating furnace |
| CN203411586U (en) * | 2013-06-27 | 2014-01-29 | 首钢总公司 | Thermal load balance prewarning device for radiant tubes of continuous annealing furnace |
| CN104133506A (en) * | 2014-07-15 | 2014-11-05 | 中冶南方工程技术有限公司 | Heating furnace heating-section hearth temperature detection value calculating method |
| CN104976616A (en) * | 2015-08-05 | 2015-10-14 | 中国东方电气集团有限公司 | Low-calorific-value fuel gas and high-temperature air burning furnace with water wall |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI696800B (en) * | 2019-04-03 | 2020-06-21 | 大陸商上海頤柏科技股份有限公司 | Temperature control system with fuel gas radiant tube and method thereof |
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