CN106371480A - Electric heating temperature control system and method for ammonia-containing waste gas treatment through catalytic oxidation - Google Patents
Electric heating temperature control system and method for ammonia-containing waste gas treatment through catalytic oxidation Download PDFInfo
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- CN106371480A CN106371480A CN201510443408.0A CN201510443408A CN106371480A CN 106371480 A CN106371480 A CN 106371480A CN 201510443408 A CN201510443408 A CN 201510443408A CN 106371480 A CN106371480 A CN 106371480A
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- 238000000034 method Methods 0.000 title claims abstract description 46
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000005485 electric heating Methods 0.000 title claims abstract description 27
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 20
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 16
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 15
- 230000003647 oxidation Effects 0.000 title claims abstract description 15
- 239000002912 waste gas Substances 0.000 title claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 93
- 238000006243 chemical reaction Methods 0.000 claims abstract description 60
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 24
- 230000008901 benefit Effects 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 4
- 238000003672 processing method Methods 0.000 claims description 4
- 241000208340 Araliaceae Species 0.000 claims description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 2
- 235000008434 ginseng Nutrition 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims 1
- 230000004044 response Effects 0.000 abstract description 5
- 230000001105 regulatory effect Effects 0.000 abstract 3
- 230000001276 controlling effect Effects 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 6
- 238000012353 t test Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention provides an electric heating temperature control system and a method for ammonia-containing waste gas treatment through catalytic oxidation. Temperature sensors are arranged in both a heating furnace and a catalytic reaction furnace for detecting the heating temperature in the heating furnace and the reaction temperature in the catalytic reaction furnace; a three-phase electrical parameter collector is connected with the output end of a power voltage regulator for collecting voltage, current and power of an electric heating pipe in the heating furnace; a control module generates a control command according to the temperature signals and the voltage, current and power values, and working states of an air makeup valve, a fan inverter and the power voltage regulator are controlled; the air makeup valve is used for regulating the ammonia concentration in the waste gas through regulating the size of the valve; the fan inverter is used for regulating the air volume of a frequency conversion fan of the heating furnace; and the power voltage regulator is used for controlling the heating power of the electric heating pipe in the heating furnace. The system and the method of the invention have the advantages that the response speed is quick; the automatic degree is high; the control precision is high; the stability is good; and the steady-state error can be controlled within +/-1 DEG C.
Description
Technical field
The invention belongs to the invention belongs to ammonia-contaminated gas purification treatment technology field is and in particular to a kind of be used for catalytic oxidation
Process electrical heating temperature control system and the method for ammonia-contaminated gas.
Background technology
Ammonia is a kind of common industrial waste gas, and catalytic oxidation processes ammonia-contaminated gas and refers to the effect in catalyst for the ammonia
Under, when temperature is more than 350 DEG C, generate water and nitrogen with oxygen reaction, thus the process being efficiently removed.Due to ammonia
The oxidation reaction of gas belongs to exothermic reaction, and course of reaction can rise the temperature (i.e. reaction temperature) around high catalyst further,
When reaction temperature is 400 DEG C, ammonia transformation efficiency is 90%, and when reaction temperature is more than 450 DEG C, catalyst has one
Determine probability to lose efficacy.Can be effectively handled for guarantee ammonia, control system power consumption and guard catalyst activity, need simultaneously
Using temperature control technology, reaction temperature is controlled at 400 DEG C.
At present, electrical heating temperature control system generally to control heating-up temperature using temperature control instrument as secondary meter,
But common temperature control instrument is only capable of receiving and control the temperature of single-point, it is not suitable for catalytic oxidation and processes ammonia-contaminated gas
Electrical heating temperature control, within the system, need respectively to gas temperature in heating furnace (i.e. heating-up temperature) and catalysis
In reacting furnace, multiple catalyst temperatures (i.e. reaction temperature) are detected, and by control power regulator output and
Mend catalyst temperature in gas temperature and catalytic reaction stove in the size Comprehensive Control heating furnace of air valve.Meanwhile, react temperature
The energy affect that degree is discharged by electric heating tube power and reaction, the energy of reaction release is had with the ammonia amount participating in reaction again
Close, namely related to ammonia concentration.Process in ammonia-contaminated gas system in actual catalytic oxidation, in waste gas, ammonia is dense
Degree has uncertainty, and the interference to reaction temperature is larger.
Content of the invention
It is an object of the invention to, a kind of catalytic oxidation treatment ammonia-contaminated gas electricity consumption heating and temperature control system and side are proposed
Method, its fast response time, high degree of automation, control accuracy are high, good stability, can control steady-state error ± 1
In DEG C.
In order to solve above-mentioned technical problem, the present invention provides a kind of catalytic oxidation treatment ammonia-contaminated gas electricity consumption heating and temperature control
System, comprising: temperature sensor, three phase electrical parameters harvester, control module, benefit air valve, fan frequency converter, electricity
Power pressure regulator；Wherein, it is mounted on described temperature sensor in heating furnace and catalytic reaction stove, be respectively used to detection heating
Heating-up temperature in stove and the reaction temperature in catalytic reaction stove, and the temperature signal detecting is sent to described control
Module；Described three phase electrical parameters harvester is connected with power regulator outfan, for gathering electric heating tube in heating furnace
Voltage and current value, obtains the heating power of electric heating tube through computing, and by the voltage of electric heating tube, electric current and performance number
It is transferred to control module；The described temperature signal that described control module provides according to temperature transmitter and three phase electrical parameters are adopted
Storage provide described voltage, electric current, performance number, generate control command, for control mend air valve, fan frequency converter with
And the working condition of power regulator；Described benefit air valve is dense by adjusting the ammonia that its valve size regulates and controls in waste gas
Degree；Described fan frequency converter is used for adjusting the air force of the frequency conversion fan of heating furnace；Described power regulator is used for controlling
The heating power of electric heating tube in heating furnace.
As a preferred embodiment of the present invention, a temperature can be connected between described temperature sensor and control module
Transmitter, the temperature signal regulation from temperature sensor is become to be easy to the temperature letter of long-distance transmissions by described temperature transmitter
Number, so easily corresponding equipment, especially control module and temperature can be installed according to the specifically used environment of the present invention
Degree sensor can not be limited by space length.
As a preferred embodiment of the present invention, control module can also connect a display interface, for receiving operator
Control signal, and the relevant parameter of system operation is shown, such operator can intuitively check the every ginseng of system
Number, thus improve Man machine interaction and experience.
As a preferred embodiment of the present invention, in heating furnace and catalytic reaction stove, it is respectively mounted multiple temperature sensors, control
Module is respectively using heating-up temperature and the reaction as reality after multiple heating-up temperature signals and multiple reaction temperature signal processing
Temperature, processing method is:
Step 4.1, temperature data is arranged in array according to order from small to large, rejects maximum in array and
Little value；
Step 4.2, minima x in peek groupiCarry out t criterion judgement, calculate and remove this minima xiAll numbers in addition
The meansigma methodss of group elementAnd standard deviation sigma；IfIf thinking, this value is gross error, from number
This minima x is rejected in groupi, then repeat this step；Otherwise carry out step 4.3；Wherein, k (n, α) is t-distribution
Test coefficient；
Step 4.3, the maximum x in peek groupjCarry out t criterion judgement, calculate and remove this maximum xjAll numbers in addition
The meansigma methodss of group elementAnd standard deviation sigma；If |If thinking, this value is gross error, from number
This maximum x is rejected in groupj, then repeat this step；Otherwise carry out step 4.4；Wherein, k (n, α) is t-distribution
Test coefficient；
Step 4.4, averages to remaining array element, using this meansigma methods as actual temperature value.
By multiple temperature sensor collecting temperature data, and the t criterion evaluation algorithm after being optimized by the present invention can obtain
Obtain true and reliable temperature data, thus improving temperature control precision.
As a preferred embodiment of the present invention, described control module controls mends air valve, fan frequency converter and electric power tune
The method of the working condition of depressor is:
Step 5.1, wind speed according to needed for system, control the operating frequency of fan frequency converter, thus controlling rotation speed of fan；
Step 5.2, if actual reaction temperature in catalytic reaction stove exceedes the reaction temperature upper limit of setting, or heating furnace
In heating-up temperature exceed the heating upper limit of setting, and continue more than 10 minutes, then close heating furnace output, with
When export failure alarm signal；Otherwise carry out step 5.3；
Step 5.3, if the reaction temperature setting in catalytic reaction stove is more than 10% with the deviation of actual reaction temperature,
Carry out step 5.4；If this deviation is between 2%～10%, carry out step 5.5, if deviation is less than 2%, walked
Rapid s5.6；
Step 5.4, according to the control electricity of heating-up temperature and power regulator output respective value table output power pressure regulator
Pressure, controls the output of power regulator, carries out step 5.2；
Step 5.5, according to the two input two output fuzzy controller of design, controls power regulator respectively and mends air valve,
Carry out step 5.2；
Step 5.6, takes Fuzzy self- turning pid to control, controls the output of power regulator, carry out step 5.2.
The present invention also proposes a kind of catalytic oxidation treatment ammonia-contaminated gas electricity consumption method for controlling heating temp of microwaven, using temperature sensor
Measurement heating-up temperature and reaction temperature, and the temperature signal measuring is passed to control module；Adopted using three phase electrical parameters
Storage gathers the voltage and current value of electric heating tube in heating furnace by power regulator, obtains adding of electric heating tube through computing
Thermal power, and the voltage of electric heating tube, electric current and performance number are transferred to control module；Control module is according to temperature pick-up
The described temperature signal that device provides and three phase electrical parameters harvester provide described voltage, electric current, performance number, generate and control
Order, for controlling the working condition mending air valve, fan frequency converter and power regulator；Wherein, described benefit air-valve
Door regulates and controls the ammonia concentration in waste gas by adjusting its valve size；Described fan frequency converter is used for adjusting the change of heating furnace
The air force of frequency blower fan；Described power regulator is used for controlling the heating power of electric heating tube in heating furnace.
Further, heating-up temperature and reaction temperature signal are first sent to temperature transmitter by temperature sensor, described temperature
The temperature signal that temperature signal regulation becomes to be easy to long-distance transmissions is being passed to control module by transmitter.
Further, control module is also associated with display interface, and operator passes through display interface initialization system control signal, and
The relevant parameter of system operation is shown.
Further, it is respectively mounted multiple temperature sensors in heating furnace and catalytic reaction stove, control module adds multiple respectively
As actual heating-up temperature and reaction temperature after hot temperature signal and multiple reaction temperature signal processing, processing method is:
Step 4.1, temperature data is arranged in array according to order from small to large, rejects maximum in array and
Little value；
Step 4.2, minima x in peek groupiCarry out t criterion judgement, calculate and remove this minima xiAll numbers in addition
The meansigma methodss of group elementAnd standard deviation sigma；IfFrom array, then reject this minima xi, so
After repeat this step；Otherwise carry out step 4.3；Wherein, k (n, α) is the test coefficient of t-distribution；
Step 4.3, the maximum x in peek groupjCarry out t criterion judgement, calculate and remove this maximum xjAll numbers in addition
The meansigma methodss of group elementAnd standard deviation sigma；If |From array, then reject this maximum xj, so
After repeat this step；Otherwise carry out step 4.4；Wherein, k (n, α) is the test coefficient of t-distribution；
Step 4.4, averages to remaining array element, using this meansigma methods as actual temperature value.
10th, electrical heating temperature control method as claimed in claim 6 mends wind it is characterised in that described control module controls
The method of the working condition of valve, fan frequency converter and power regulator is:
Step 5.1, wind speed according to needed for system, control the operating frequency of fan frequency converter, thus controlling rotation speed of fan；
Step 5.2, if actual reaction temperature in catalytic reaction stove exceedes the reaction temperature upper limit of setting, or heating furnace
In heating-up temperature exceed the heating upper limit of setting, and continue more than 10 minutes, then close heating furnace output, with
When export failure alarm signal；Otherwise carry out step 5.3；
Step 5.3, if the reaction temperature setting in catalytic reaction stove is more than 10% with the deviation of actual reaction temperature,
Carry out step 5.4；If this deviation is between 2%～10%, carry out step 5.5, if deviation is less than 2%, walked
Rapid s5.6；
Step 5.4, according to the control electricity of heating-up temperature and power regulator output respective value table output power pressure regulator
Pressure, controls the output of power regulator, carries out step 5.2；
Step 5.5, according to the two input two output fuzzy controller of design, controls power regulator respectively and mends air valve,
Carry out step 5.2；
Step 5.6, takes Fuzzy self- turning pid to control, controls the output of power regulator, carry out step 5.2.
Compared with prior art, its remarkable advantage is the present invention, the electrical heating temperature control system of the present invention and method,
By being controlled to heating power, ammonia concentration and air force, can effective control ammonia in catalytic oxidation
During operating temperature value；Using temperature control system and the method for the present invention, by controlling benefit air valve size permissible
Improve the response speed of cooling；Comprehensively had using Discrete control, fuzzy control and Fuzzy self- turning pid control method and be
System fast response time, control accuracy are high, the advantage of good stability, can control steady-state error in ± 1 DEG C, show boundary
Face makes system operatio have more hommization.
Brief description
Fig. 1 is the composition schematic diagram of electrical heating temperature control system of the present invention；
Fig. 2 is electrical heating temperature control method flow chart of the present invention；
Fig. 3 is the t test criterion flow chart after optimizing in the present invention；
Fig. 4 is the flow chart of Discrete control temperature in the present invention.
Specific embodiment
Easy to understand, according to technical scheme, in the case of the connotation not changing the present invention, this area
Those skilled in the art can imagine catalytic oxidation treatment ammonia-contaminated gas electricity consumption heating and temperature control system of the present invention and side
The numerous embodiments of method.Therefore, detailed description below and accompanying drawing are only exemplary to technical scheme
Illustrate, and be not to be construed as the whole of the present invention or be considered as the restriction to technical solution of the present invention or restriction.
For the electrical heating temperature control system of catalytic oxidation treatment ammonia-contaminated gas, as shown in figure 1, including following part:
Temperature sensor 1, temperature transmitter 2, three phase electrical parameters harvester 3, control module 4, benefit air valve 5, blower fan become
Frequency device 6, power regulator 7, display interface 8 and computer 9.
Wherein, multiple temperature sensors 1, are respectively used to detect the temperature of ammonia-contaminated gas in heating furnace and catalytic reaction
The operating temperature of catalyst in stove, and the temperature voltage signal detecting is sent to temperature transmitter, temperature sensor 1
For K-type armoured thermocouple, up to 1300 DEG C of temperature can be measured, protection sleeve pipe adopts 316l rustless steel, has resistance to
High temperature, the advantage of acid-alkali-corrosive-resisting；
Temperature transmitter 2, is arranged in the protecting box of temperature sensor, by the temperature voltage letter from temperature sensor 1
Number nurse one's health into the 4～20ma current signal being easy to long-distance transmissions, measurement point temperature compensated and linearity correction simultaneously,
Temperature transmitter 2 precision is 0.2%fs, temperature range is 0～800 DEG C, and temperature current signal is transmitted by temperature transmitter 2
To control module 4；
Three phase electrical parameters harvester 3, is connected using three-phase four-wire system mode with power regulator 7 outfan, and it is assorted which comes
Current signal by current transformer access three phase electrical parameters harvester 3, collection heating furnace in electric heating tube voltage and
Current value, through computing obtain electric heating tube heating power, and by communication interface rs485 by the voltage of electric heating tube,
Electric current and power parameter are transferred to control module 4；
Control module 4, the temperature signal of reception temperature transmitter 2 and the electrical heating voltage of three phase electrical parameters harvester 3,
Electric current, power parameter, judge the running status of system, the initial parameter of coupling system setting: the reaction of catalytic reaction stove
Temperature is the temperature that the operating temperature of catalyst, the reaction temperature upper limit and heating upper limit are the ammonia-contaminated gas in heating furnace
The upper limit generates control signal, corresponding control signal is transferred to benefit air valve 5 and power regulator 7, to reaction temperature
It is adjusted, current operating conditions are included each temperature value, electrical heating voltage, electric current, power parameter, frequency conversion simultaneously
The output frequency real-time Transmission of device is to display interface 8 and computer 9；
Mend air valve 5, receive the control signal from control module 4, adjust the size that air valve 5 mended by heating furnace, from
And adjust the concentration of ammonia in waste gas；
Fan frequency converter 6, is derived from the control signal of control module 4 by rs485 interface, adjusts the change of heating furnace
The air force of frequency blower fan；
Power regulator 7, receives the control signal from control module 4, controls the heating work(of electric heating tube in heating furnace
Rate；
Display interface 8, receives the control signal of operator, relevant parameter is configured, and system running state is entered
Row display；
Computer 9, is connected to control module using can interface, so that computer 9 is controlled to system；
As shown in Fig. 2 the control method step based on said temperature control system:
S1, is that in heating furnace, the temperature of ammonia-contaminated gas and reaction temperature are urged using temperature sensor 1 measurement heating-up temperature
The operating temperature of agent, and the temperature voltage signal measuring is sent to temperature transmitter 2；
S2, temperature transmitter 2 compensates to temperature signal, linearity correction, and by temperature voltage signal conversion for ease of
4～20ma current signal of long-distance transmissions, is then passed to control module 4；
S3, control module 4 receives after the temperature current signal of temperature transmitter 2, is converted into temperature through signal condition
Degree voltage signal, control module 4 is sampled, parsed and is optimized to this voltage signal, obtains reaction temperature and heating temperature
The actual value of degree；
S4, control module 4 receive from three phase electrical parameters harvester 3 send the heating voltage of electric heating tube, electric current,
Power parameter, thus obtain the actual operating state of electric heating tube；
S5, control module 4 generates control signal according to the set temperature value of heating furnace and catalytic reaction stove, and will be corresponding
Control signal is respectively transmitted to benefit air valve 5, fan frequency converter 6 and power regulator 7；
S6, mends air valve 5, receives the control signal from control module 4, adjusts the size that air valve 5 mended by heating furnace,
Thus adjusting the concentration of ammonia in waste gas；Fan frequency converter 6, is derived from the control of control module 4 by rs485 interface
Signal processed, adjusts the air force of the frequency conversion fan of heating furnace；Power regulator 7, receives the control from control module 4
Signal processed, controls the heating power of electric heating tube in heating furnace.
Because industry spot has various interference, can there is certain error in the actual temperature value that control module 4 obtains, because
This, when control module 4 obtains the data of heating-up temperature and reaction temperature, need to carry out digital filtering to it.As Fig. 3
Shown, step s3 further includes:
S3.1, control module 4 receives temperature data, and digital signal is converted into equivalent temperature value；
S3.2, processes to heating-up temperature array and reaction temperature data respectively according to t test criterion method, processed
Cheng Wei: temperature data order from small to large is rearranged array, rejects the maximum in array and minima；
S3.3, minima xi in peek group carries out t criterion judgement, calculates all array elements in addition to this minima
Meansigma methodssAnd standard deviation sigma；If |(test coefficient k (n, α) of t-distribution can be checked in by table),
Then think that xi is gross error, reject this value from array, then repeat step s3.3, otherwise carry out step s3.4；
S3.4, the maximum x in peek groupjCarry out t criterion judgement, calculate and remove this maximum xjAll array units in addition
The meansigma methodss of elementAnd standard deviation sigma；If |From array, then reject this maximum xj, Ran Houchong
Duplicate step；Otherwise carry out step 4.4；Wherein, k (n, α) is the test coefficient of t-distribution；
S3.5, averages to remaining array element, using the meansigma methodss of array as reaction temperature and heating-up temperature reality
Actual value；
The feature of t test criterion is to reject a suspicious measured value first, then checks disallowable recording by t-distribution
Whether value contains gross error.It is the array of n for array element quantity, using general t test criterion, in order to count
Calculating standard deviation sigma needs to do (n-1) 2 multiplyings, using the t test criterion determination methods optimizing in the present invention, minimum
Only need to do the secondary multiplying of 2 (n-1), decrease amount of calculation.
Fig. 4 is the temperature control flow figure of the present invention.Temperature control algorithm combines Discrete control, fuzzy control and obscures
Self-tuning System pid control algolithm, step s5 further includes:
S5.1, if setting reaction temperature and real reaction temperature deviation more than 10%, carries out step s5.2, if deviation exists
2%～10%, then carry out step s5.3, if deviation is less than 2%, carry out step s5.4；
S5.2, takes Discrete control, according to temperature and power regulator output respective value table output power pressure regulator
1～5v control voltage；
S5.3, takes second-order system fuzzy control, according to the two input two output fuzzy controller of design, controls electricity respectively
Power pressure regulator and benefit air valve；
S5.4, takes Fuzzy self- turning pid to control, controls the output of power regulator.
Heating initial stage catalytic reaction stove actual temperature and design temperature deviation are very big, can improve system using Discrete control
Response speed, and do not produce excessive overshoot；When temperature deviation is 2%～10%, ammonia decomposes under catalyst action to be put
Heat, needs to control power regulator output and mends air valve size, using second-order system FUZZY ALGORITHMS FOR CONTROL, compare
More preferable in pid algorithm dynamic property；When temperature deviation is in 2%, controlled using Fuzzy self- turning pid, further
Eliminate static error, improve control accuracy.
Claims (10)
1. a kind of catalytic oxidation treatment ammonia-contaminated gas electricity consumption heating and temperature control system is it is characterised in that include: temperature
Sensor (1), three phase electrical parameters harvester (3), control module (4), mend air valve (5), fan frequency converter (6),
Power regulator (7)；Wherein,
It is mounted on described temperature sensor (1) in heating furnace and catalytic reaction stove, be respectively used to detect adding in heating furnace
Reaction temperature in hot temperature and catalytic reaction stove, and the temperature signal detecting is sent to described control module (4)；
Described three phase electrical parameters harvester (3) is connected with power regulator (7) outfan, for gathering electricity in heating furnace
The voltage and current value of heating tube, obtains the heating power of electric heating tube through computing, and by the voltage of electric heating tube, electric current
It is transferred to control module (4) with performance number；
Described temperature signal and three phase electrical parameters collection that described control module (4) provides according to temperature transmitter (2)
Device (3) provides described voltage, electric current, performance number, generates control command, mends air valve (5), blower fan for controlling
Converter (6) and the working condition of power regulator (7)；
Described benefit air valve (5) regulates and controls the ammonia concentration in waste gas by adjusting its valve size；
Described fan frequency converter (6) is used for adjusting the air force of the frequency conversion fan of heating furnace；
Described power regulator (7) is used for controlling the heating power of electric heating tube in heating furnace.
2. electrical heating temperature control system as claimed in claim 1 is it is characterised in that in described temperature sensor (1)
It is also associated with temperature transmitter (2) and control module (4) between, described temperature transmitter (2) will be from temperature sensing
The temperature signal regulation of device (1) becomes to be easy to the temperature signal of long-distance transmissions.
3. electrical heating temperature control system as claimed in claim 1 is it is characterised in that control module (4) is also associated with
Display interface (8) is used for receiving the control signal of operator, and the relevant parameter of system operation is shown.
4. electrical heating temperature control system as claimed in claim 1 is it is characterised in that in heating furnace and catalytic reaction stove
It is respectively mounted multiple temperature sensors (1), control module (4) is respectively by multiple heating-up temperature signals and multiple reaction temperature
As actual heating-up temperature and reaction temperature after signal processing, processing method is:
Step 4.1, temperature data is arranged in array according to order from small to large, rejects maximum in array and
Little value；
Step 4.2, minima x in peek groupiCarry out t criterion judgement, calculate and remove this minima xiAll numbers in addition
The meansigma methodss of group elementAnd standard deviation sigma；IfFrom array, then reject this minima xi, so
After repeat this step；Otherwise carry out step 4.3；Wherein, k (n, α) is the test coefficient of t-distribution；
Step 4.3, the maximum x in peek groupjCarry out t criterion judgement, calculate and remove this maximum xjAll numbers in addition
The meansigma methodss of group elementAnd standard deviation sigma；IfFrom array, then reject this maximum xj, so
After repeat this step；Otherwise carry out step 4.4；Wherein, k (n, α) is the test coefficient of t-distribution；
Step 4.4, averages to remaining array element, using this meansigma methods as actual temperature value.
5. electrical heating temperature control system as claimed in claim 1 is it is characterised in that described control module (4) controls
The method mending the working condition of air valve (5), fan frequency converter (6) and power regulator (7) is:
Step 5.1, wind speed according to needed for system, control the operating frequency of fan frequency converter, thus controlling rotation speed of fan；
Step 5.2, if actual reaction temperature in catalytic reaction stove exceedes the reaction temperature upper limit of setting, or heating furnace
In heating-up temperature exceed the heating upper limit of setting, and continue more than 10 minutes, then close heating furnace output, with
When export failure alarm signal；Otherwise carry out step 5.3；
Step 5.3, if the reaction temperature setting in catalytic reaction stove is more than 10% with the deviation of actual reaction temperature,
Carry out step 5.4；If this deviation is between 2%～10%, carry out step 5.5, if deviation is less than 2%, walked
Rapid 5.6；
Step 5.4, according to the control electricity of heating-up temperature and power regulator output respective value table output power pressure regulator
Pressure, controls the output of power regulator, carries out step 5.2；
Step 5.5, according to two input two output fuzzy controller, controls power regulator respectively and mends air valve, carry out
Step 5.2；
Step 5.6, takes Fuzzy self- turning pid to control, controls the output of power regulator, carry out step 5.2.
6. a kind of catalytic oxidation treatment ammonia-contaminated gas electricity consumption method for controlling heating temp of microwaven it is characterised in that
Measure heating-up temperature and reaction temperature using temperature sensor (1), and the temperature signal measuring is passed to control
Molding block (4)；
Using three phase electrical parameters harvester (3) by power regulator (7) gather heating furnace in electric heating tube voltage and
Current value, obtains the heating power of electric heating tube, and the voltage of electric heating tube, electric current and performance number is transferred to through computing
Control module (4)；
Described temperature signal and three phase electrical parameters harvester (3) that control module (4) provides according to temperature transmitter (2)
Described voltage, electric current, performance number are provided, generate control command, mend air valve (5), fan frequency converter (6) for controlling
And the working condition of power regulator (7)；Wherein, described benefit air valve (5) is adjusted by adjusting its valve size
Ammonia concentration in control waste gas；Described fan frequency converter (6) is used for adjusting the air force of the frequency conversion fan of heating furnace；
Described power regulator (7) is used for controlling the heating power of electric heating tube in heating furnace.
7. electrical heating temperature control method as claimed in claim 6 will be it is characterised in that temperature sensor (1) first will add
Hot temperature and reaction temperature signal are sent to temperature transmitter (2), and temperature signal is adjusted by described temperature transmitter (2)
Manage into and be easy to the temperature signal of long-distance transmissions and passing to control module (4).
8. electrical heating temperature control method as claimed in claim 6 is it is characterised in that control module (4) is also associated with
Display interface (8), operator passes through display interface (8) initialization system control signal, and the correlation ginseng to system operation
Number is shown.
9. electrical heating temperature control method as claimed in claim 6 is it is characterised in that in heating furnace and catalytic reaction stove
In be respectively mounted multiple temperature sensors (1), control module (4) is respectively by multiple heating-up temperature signals and multiple reaction temperature
As actual heating-up temperature and reaction temperature after degree signal processing, processing method is:
Step 4.1, temperature data is arranged in array according to order from small to large, rejects maximum in array and
Little value；
Step 4.2, minima x in peek groupiCarry out t criterion judgement, calculate and remove this minima xiAll numbers in addition
The meansigma methodss of group elementAnd standard deviation sigma；IfFrom array, then reject this minima xi, so
After repeat this step；Otherwise carry out step 4.3；Wherein, k (n, α) is the test coefficient of t-distribution；
Step 4.3, the maximum x in peek groupjCarry out t criterion judgement, calculate and remove this maximum xjAll numbers in addition
The meansigma methodss of group elementAnd standard deviation sigma；IfFrom array, then reject this maximum xj, so
After repeat this step；Otherwise carry out step 4.4；Wherein, k (n, α) is the test coefficient of t-distribution；
Step 4.4, averages to remaining array element, using this meansigma methods as actual temperature value.
10. electrical heating temperature control method as claimed in claim 6 is it is characterised in that described control module (4) is controlled
The method that system mends the working condition of air valve (5), fan frequency converter (6) and power regulator (7) is:
Step 5.1, wind speed according to needed for system, control the operating frequency of fan frequency converter, thus controlling rotation speed of fan；
Step 5.2, if actual reaction temperature in catalytic reaction stove exceedes the reaction temperature upper limit of setting, or heating furnace
In heating-up temperature exceed the heating upper limit of setting, and continue more than 10 minutes, then close heating furnace output, with
When export failure alarm signal；Otherwise carry out step 5.3；
Step 5.3, if the reaction temperature setting in catalytic reaction stove is more than 10% with the deviation of actual reaction temperature,
Carry out step 5.4；If this deviation is between 2%～10%, carry out step 5.5, if deviation is less than 2%, walked
Rapid s5.6；
Step 5.4, according to the control electricity of heating-up temperature and power regulator output respective value table output power pressure regulator
Pressure, controls the output of power regulator, carries out step 5.2；
Step 5.5, according to two input two output fuzzy controller, controls power regulator respectively and mends air valve, carry out
Step 5.2；
Step 5.6, takes Fuzzy self- turning pid to control, controls the output of power regulator, carry out step 5.2.
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| CN112743215A (en) * | 2020-12-25 | 2021-05-04 | 东莞普莱信智能技术有限公司 | Welding temperature control method and device for inductor |
| CN113652357A (en) * | 2021-09-16 | 2021-11-16 | 杭州科默斯科技有限公司 | Cell recovery device and cell recovery temperature control method |
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