CN106371480B - A kind of catalytic oxidation treatment ammonia-contaminated gas electricity consumption heating and temperature control system and method - Google Patents
A kind of catalytic oxidation treatment ammonia-contaminated gas electricity consumption heating and temperature control system and method Download PDFInfo
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- CN106371480B CN106371480B CN201510443408.0A CN201510443408A CN106371480B CN 106371480 B CN106371480 B CN 106371480B CN 201510443408 A CN201510443408 A CN 201510443408A CN 106371480 B CN106371480 B CN 106371480B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000003647 oxidation Effects 0.000 title claims abstract description 15
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 15
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 14
- 230000005611 electricity Effects 0.000 title claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 61
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000005485 electric heating Methods 0.000 claims abstract description 25
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 24
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 238000009826 distribution Methods 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 10
- 230000008901 benefit Effects 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 5
- 238000003672 processing method Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000004044 response Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 22
- 239000003054 catalyst Substances 0.000 description 10
- 238000003491 array Methods 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 5
- 238000012353 t test Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 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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Abstract
A kind of catalytic oxidation treatment ammonia-contaminated gas electricity consumption heating and temperature control system of present invention proposition and method.It is mounted on the temperature sensor in heating furnace and catalysis reacting furnace, the reaction temperature in the heating temperature and catalysis reacting furnace that are respectively used in detection heating furnace；Three phase electrical parameters collector is connect with power regulator output end, for acquiring the voltage of electric heating tube, current value and power in heating furnace；Control module generates control command according to temperature signal and voltage, electric current, performance number, and the working condition of air valve, fan frequency converter and power regulator is mended in control；It mends air valve and regulates and controls the ammonia concentration in exhaust gas by adjusting its valve size；Fan frequency converter is used to adjust the air force of the frequency conversion fan of heating furnace；Power regulator is used to control the heating power of electric heating tube in heating furnace.Fast response time of the present invention, high degree of automation, control accuracy are high, stability is good, can control steady-state error in ± 1 DEG C.
Description
Technical field
The invention belongs to the invention belongs to ammonia-contaminated gas purification treatment technology fields, and in particular to one kind being used for catalysis oxidation
Method handles the electrical heating temperature control system and method for ammonia-contaminated gas.
Background technology
Ammonia is a kind of common industrial waste gas, and it refers to effect of the ammonia in catalyst that catalytic oxidation, which handles ammonia-contaminated gas,
Under, when temperature is more than 350 DEG C, is reacted with oxygen and generate water and nitrogen, the process to be efficiently removed.Due to the oxygen of ammonia
Change reaction and belong to exothermic reaction, reaction process can further increase the temperature (i.e. reaction temperature) around catalyst, when reaction temperature
When degree is 400 DEG C, ammonia transformation efficiency is 90%, and when reaction temperature is more than 450 DEG C, catalyst has certain probability to fail.For
Ensure that ammonia can be effectively handled, while control system power consumption and guard catalyst activity, needs to use temperature control technology
Reaction temperature is controlled at 400 DEG C.
Currently, electrical heating temperature control system generally use temperature control instrument controls heating temperature as secondary meter
Degree, but common temperature control instrument is only capable of receiving and controlling the temperature of single-point, and it is useless containing ammonia not to be suitable for catalytic oxidation processing
The electrical heating temperature of gas controls, and within the system, needs anti-to gas temperature in heating furnace (i.e. heating temperature) and catalysis respectively
Multiple catalyst temperatures (i.e. reaction temperature) in stove are answered to be detected, and by controlling power regulator output power and mending air-valve
Gas temperature and catalyst temperature in catalysis reacting furnace in the size Comprehensive Control heating furnace of door.Meanwhile reaction temperature is added by electricity
The energy affect of heat pipe power and reaction release, the energy for reacting release is again related with the ammonia amount for participating in reaction, namely and ammonia
Gas concentration is related.In actual catalytic oxidation handles ammonia-contaminated gas system, the concentration of ammonia has uncertainty in exhaust gas,
It is larger to the interference of reaction temperature.
Invention content
It is an object of the present invention to propose a kind of catalytic oxidation treatment ammonia-contaminated gas electricity consumption heating and temperature control system and side
Method, fast response time, high degree of automation, control accuracy are high, stability is good, can control steady-state error in ± 1 DEG C.
In order to solve the above technical problem, the present invention provides a kind of catalytic oxidation treatment ammonia-contaminated gas electrical heating temperature controls
System processed, including：Temperature sensor, control module, mends air valve, fan frequency converter, electric power pressure regulation at three phase electrical parameters collector
Device；Wherein, it is mounted on the temperature sensor in heating furnace and catalysis reacting furnace, the heating being respectively used in detection heating furnace
Reaction temperature in temperature and catalysis reacting furnace, and the temperature signal detected is sent to the control module；Described three
Phase electrical parameter collector is connect with power regulator output end, the voltage and current value for acquiring electric heating tube in heating furnace,
The heating power of electric heating tube is obtained through operation, and the voltage, electric current and performance number of electric heating tube are transferred to control module；Institute
It states the temperature signal that control module is provided according to temperature transmitter and three phase electrical parameters collector provides the voltage, electricity
Stream, performance number generate control command, for controlling the working condition for mending air valve, fan frequency converter and power regulator；Institute
It states and mends air valve and regulate and control the ammonia concentration in exhaust gas by adjusting its valve size；The fan frequency converter is heated for adjusting
The air force of the frequency conversion fan of stove；The power regulator is used to control the heating power of electric heating tube in heating furnace.
As a preferred embodiment of the present invention, a temperature can be connected between the temperature sensor and control module
Transmitter is spent, the temperature transmitter is by the temperature signal regulation from temperature sensor at the temperature letter convenient for transmitting at a distance
Number, easily specifically used environment according to the present invention can be installed by corresponding equipment, especially control module and temperature in this way
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 operation
The control signal of person, and the relevant parameter of system operation is shown, such operator can intuitively check that system items are joined
Number, to improve Man machine interaction and experience.
As a preferred embodiment of the present invention, multiple temperature sensors are respectively mounted in heating furnace and catalysis reacting furnace, are controlled
Molding block will be used as actual heating temperature and reaction respectively after multiple heating temperature signals and multiple reaction temperature signal processings
Temperature, processing method are：
Step 4.1, by temperature data according to the array that is ranked sequentially into from small to large, maximum value in array and most is rejected
Small value；
Step 4.2, the minimum value x in access groupiT criterion judgements are carried out, calculates and removes minimum value xiAll arrays in addition
The average value of elementAnd standard deviation sigma；IfIf thinking, the value is gross error, is rejected from array
Minimum value xi, then repeat this step；Otherwise step 4.3 is carried out；Wherein, K (n, α) is the test coefficient of t distributions；
Step 4.3, the maximum value x in access groupjT criterion judgements are carried out, calculates and removes maximum value xjAll arrays in addition
The average value of elementAnd standard deviation sigma；IfIf thinking, the value is gross error, is rejected from array
Maximum value xj, then repeat this step；Otherwise step 4.4 is carried out；Wherein, K (n, α) is the test coefficient of t distributions；
Step 4.4, remaining array element is averaged, using the average value as actual temperature value.
T criterion by multiple temperature sensor collecting temperature data, and after optimizing through the invention judge that algorithm can be with
True and reliable temperature data is obtained, to improve temperature control precision.
As a preferred embodiment of the present invention, air valve, fan frequency converter and electric power are mended in the control module control
The method of the working condition of pressure regulator is：
Step 5.1, according to wind speed needed for system, the working frequency of fan frequency converter is controlled, to control rotation speed of fan；
Step 5.2, if actual reaction temperature is more than the reaction temperature upper limit or heating furnace of setting in catalysis reacting furnace
In heating temperature be more than setting heating upper limit, and continue 10 minutes or more, then close heating furnace output, export simultaneously
Failure alarm signal；Otherwise step 5.3 is carried out；
Step 5.3, if the deviation of the reaction temperature and actual reaction temperature set in catalysis reacting furnace is more than 10%,
Carry out step 5.4；If the deviation between 2%~10%, carries out step 5.5, if deviation is less than 2%, step is carried out
S5.6；
Step 5.4, according to the control of heating temperature and power regulator output power respective value table output power pressure regulator
Voltage controls the output power of power regulator, carries out step 5.2；
Step 5.5, according to two output fuzzy controller of the two of design inputs, power regulator is controlled respectively and mends air-valve
Door carries out step 5.2；
Step 5.6, fuzzy self-turning PID control is taken, the output power of power regulator is controlled, carries 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, temperature in use sensing
Device measures heating temperature and reaction temperature, and the temperature signal measured is passed to control module；It is adopted using three phase electrical parameters
Storage acquires the voltage and current value of electric heating tube in heating furnace by power regulator, and the heating of electric heating tube is obtained through operation
Power, and the voltage, electric current and performance number of electric heating tube are transferred to control module；Control module is provided according to temperature transmitter
The temperature signal and three phase electrical parameters collector the voltage, electric current, performance number are provided, generate control command, be used for
The working condition of air valve, fan frequency converter and power regulator is mended in control；Wherein, the benefit air valve is by adjusting its valve
Door size regulates and controls the ammonia concentration in exhaust gas；The air quantity for the frequency conversion fan that the fan frequency converter is used to adjust heating furnace is big
It is small；The power regulator is used to control the heating power of electric heating tube in heating furnace.
Further, heating temperature and reaction temperature signal are first sent to temperature transmitter, the temperature by temperature sensor
Temperature signal regulation is being passed to control module by degree transmitter at convenient for the temperature signal that transmits at a distance.
Further, control module is also associated with display interface, and operator controls signal by display interface initialization system, and
The relevant parameter of system operation is shown.
Further, multiple temperature sensors are respectively mounted in heating furnace and catalysis reacting furnace, control module respectively will be multiple
It is as actual heating temperature and reaction temperature, processing method after heating temperature signal and multiple reaction temperature signal processings：
Step 4.1, by temperature data according to the array that is ranked sequentially into from small to large, maximum value in array and most is rejected
Small value；
Step 4.2, the minimum value x in access groupiT criterion judgements are carried out, calculates and removes minimum value xiAll arrays in addition
The average value of elementAnd standard deviation sigma；IfMinimum value x is then rejected from arrayi, then repeat this
Step；Otherwise step 4.3 is carried out；Wherein, K (n, α) is the test coefficient of t distributions；
Step 4.3, the maximum value x in access groupjT criterion judgements are carried out, calculates and removes maximum value xjAll arrays in addition
The average value of elementAnd standard deviation sigma；IfMaximum value x is then rejected from arrayj, then repeat this
Step；Otherwise step 4.4 is carried out；Wherein, K (n, α) is the test coefficient of t distributions；
Step 4.4, remaining array element is averaged, using the average value as actual temperature value.
10, electrical heating temperature control method as claimed in claim 6, which is characterized in that wind is mended in the control module control
The method of the working condition of valve, fan frequency converter and power regulator is：
Step 5.1, according to wind speed needed for system, the working frequency of fan frequency converter is controlled, to control rotation speed of fan；
Step 5.2, if actual reaction temperature is more than the reaction temperature upper limit or heating furnace of setting in catalysis reacting furnace
In heating temperature be more than setting heating upper limit, and continue 10 minutes or more, then close heating furnace output, export simultaneously
Failure alarm signal；Otherwise step 5.3 is carried out；
Step 5.3, if the deviation of the reaction temperature and actual reaction temperature set in catalysis reacting furnace is more than 10%,
Carry out step 5.4；If the deviation between 2%~10%, carries out step 5.5, if deviation is less than 2%, step is carried out
S5.6；
Step 5.4, according to the control of heating temperature and power regulator output power respective value table output power pressure regulator
Voltage controls the output power of power regulator, carries out step 5.2；
Step 5.5, according to two output fuzzy controller of the two of design inputs, power regulator is controlled respectively and mends air-valve
Door carries out step 5.2；
Step 5.6, fuzzy self-turning PID control is taken, the output power of power regulator is controlled, carries out step 5.2.
Compared with prior art, the present invention its remarkable advantage is, electrical heating temperature control system of the invention and method,
By controlling heating power, ammonia concentration and air force, ammonia can be effectively controlled in catalytic oxidation mistake
Operating temperature value in journey；Using the temperature control system and method for the present invention, mending air valve size by control can improve
The response speed of cooling；It is comprehensive using Discrete control, fuzzy control and Self-tuning Fuzzy PID Control to there is system to respond speed
The advantage that degree is fast, control accuracy is high, stability is good can control steady-state error in ± 1 DEG C, and display interface makes system operatio
More hommization.
Description of the drawings
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 charts after optimizing in the present invention；
Fig. 4 is the flow chart of Discrete control temperature in the present invention.
Specific implementation mode
It is readily appreciated that, technical solution according to the present invention, in the case where not changing the connotation of the present invention, this field
Those skilled in the art can imagine catalytic oxidation treatment ammonia-contaminated gas electricity consumption heating and temperature control system and method for the present invention
Numerous embodiments.Therefore, detailed description below and attached drawing are only the exemplary illustrations to technical scheme of the present invention,
And it is not to be construed as the whole of the present invention or is considered as the limitation or restriction to technical solution of the present invention.
For the electrical heating temperature control system of catalytic oxidation treatment ammonia-contaminated gas, as shown in Figure 1, including with lower part：
Temperature sensor 1, three phase electrical parameters collector 3, control module 4, mends air valve 5, fan frequency converter 6, electricity at temperature transmitter 2
Power pressure regulator 7, display interface 8 and computer 9.
Wherein, multiple temperature sensors 1 are respectively used to temperature and the catalysis reaction of the ammonia-contaminated gas in detection heating furnace
The operating temperature of catalyst in stove, and the temperature voltage signal detected is sent to temperature transmitter, temperature sensor 1 is K
Type armoured thermocouple, can measure up to 1300 DEG C of temperature, and protection sleeve pipe uses 316L stainless steels, have high temperature resistant, acidproof
The advantages of caustic corrosion；
Temperature transmitter 2 is mounted in the protecting box of temperature sensor, will be believed from the temperature voltage of temperature sensor 1
Number conditioning compensates measurement point temperature and linearity correction, temperature at 4~20mA current signals convenient for transmitting at a distance
Degree 2 precision of transmitter is 0.2%FS, temperature range is 0~800 DEG C, and temperature transmitter 2 sends temperature current signal to control
Module 4；
Three phase electrical parameters collector 3 is connect with 7 output end of power regulator using three-phase four-wire system mode, current signal
Three phase electrical parameters collector 3 is accessed by current transformer, the voltage and current value of electric heating tube in heating furnace is acquired, through operation
The heating power of electric heating tube is obtained, and is transmitted the voltage, electric current and power parameter of electric heating tube by communication interface RS485
To control module 4；
Control module 4 receives electrical heating voltage, the electricity of the temperature signal and three phase electrical parameters collector 3 of temperature transmitter 2
Stream, power parameter, judge the operating status of system, the initial parameter being arranged in conjunction with system：Catalysis reacting furnace reaction temperature be
The temperature upper limit generation of the operating temperature, the reaction temperature upper limit and the ammonia-contaminated gas in heating upper limit, that is, heating furnace of catalyst
Signal is controlled, by corresponding control signal transmission to air valve 5 and power regulator 7 is mended, reaction temperature is adjusted, simultaneously
Include that the output frequency of each temperature value, electrical heating voltage, electric current, power parameter and frequency converter passes in real time by current operating conditions
It is defeated by display interface 8 and computer 9；
Air valve 5 is mended, the control signal from control module 4 is received, adjusts the size that heating furnace mends air valve 5, to
Adjust the concentration of ammonia in exhaust gas；
Fan frequency converter 6 adjusts the frequency conversion of heating furnace by control signal of the RS485 interfaces from control module 4
The air force of wind turbine；
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, is configured to relevant parameter, and to system running state into
Row display；
Computer 9 is connected to control module using CAN interface, so that computer 9 controls system；
As shown in Fig. 2, the control method step based on above-mentioned temperature control system：
S1, the temperature and reaction temperature that temperature in use sensor 1 measures ammonia-contaminated gas in heating temperature, that is, heating furnace are
The operating temperature of catalyst, and send the temperature voltage signal measured to temperature transmitter 2；
S2, temperature transmitter 2 compensates temperature signal, linearity correction, and converts temperature voltage signal to and be convenient for
4~20mA the current signals transmitted at a distance, are then passed to control module 4；
S3 is converted into temperature after control module 4 receives the temperature current signal from temperature transmitter 2 through signal condition
Voltage signal is spent, control module 4 samples the voltage signal, parsed and optimized, and reaction temperature and heating temperature are obtained
Actual value；
S4, control module 4 receive heating voltage, electric current, the work(of the electric heating tube sent from three phase electrical parameters collector 3
Rate parameter, to obtain the actual operating state of electric heating tube；
S5, control module 4 generate control signal according to the set temperature value of heating furnace and catalysis reacting furnace, 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 heating furnace mends air valve 5, from
And adjust the concentration of ammonia in exhaust gas；Fan frequency converter 6, by control signal of the RS485 interfaces from control module 4,
Adjust the air force of the frequency conversion fan of heating furnace；Power regulator 7, receives the control signal from control module 4, and control adds
The heating power of electric heating tube in hot stove.
Since industry spot is there is various interference, the actual temperature value that control module 4 obtains can have certain error, because
This needs to carry out digital filtering to it when control module 4 obtains the data of heating temperature and reaction temperature.As shown in figure 3,
Step S3 further comprises：
S3.1, control module 4 receive temperature data, digital signal are converted into equivalent temperature value；
S3.2 is respectively handled heating temperature array and reaction temperature data according to t test criterions method, is processed
Cheng Wei：By the maximum value and minimum value that are ranked sequentially composition array, reject in array of temperature data from small to large；
S3.3, the minimum value xi in access group carry out t criterion judgements, calculate all array elements in addition to the minimum value
Average valueAnd standard deviation sigma；If(the test coefficient K (n, α) that t distributions can be checked in by table), then it is assumed that
Xi is gross error, and the value is rejected from array, then repeatedly step S3.3, otherwise carries out step S3.4；
S3.4, the maximum value x in access groupjT criterion judgements are carried out, calculates and removes maximum value xjAll arrays member in addition
The average value of elementAnd standard deviation sigma；IfMaximum value x is then rejected from arrayj, then repeat this step
Suddenly；Otherwise step 4.4 is carried out；Wherein, K (n, α) is the test coefficient of t distributions；
S3.5 is averaged remaining array element, using the average value of array as reaction temperature and heating temperature
Actual value；
The characteristics of t test criterions is to reject a suspicious measured value first, is then measured by what t distribution inspections were removed
Whether value contains gross error.For the array that array element quantity is n, using general t test criterions, in order to calculate standard
Poor σ needs do (n-1) 2 multiplyings, using the t test criterion judgment methods optimized in the present invention, at least only need to do 2
(n-1) secondary multiplying, reduces calculation amount.
Fig. 4 is the temperature control flow figure of the present invention.Temperature control algorithm combines Discrete control, fuzzy control and obscures
Self-regulated PID control algorithm, step S5 further comprise：
S5.1 carries out step S5.2, if deviation exists if setting reaction temperature and real reaction temperature deviation are more than 10%
2%~10%, then step S5.3 is carried out, if deviation is less than 2%, carries out step S5.4；
S5.2 takes Discrete control, according to temperature and power regulator output power respective value table output power pressure regulator
1~5V control voltage；
S5.3 takes second-order system fuzzy control, and according to two output fuzzy controller of the two of design inputs, control is electric respectively
Power pressure regulator and benefit air valve；
S5.4 takes fuzzy self-turning PID control, controls the output power of power regulator.
Heating initial stage is catalyzed reacting furnace actual temperature and set temperature deviation is very big, and system can be improved using Discrete control
Response speed, and do not generate excessive overshoot；When temperature deviation is 2%~10%, ammonia decomposes under the action of catalyst to be put
Heat needs to control power regulator output power and mends air valve size, using second-order system FUZZY ALGORITHMS FOR CONTROL, compared to
Pid algorithm dynamic property is more preferable；When temperature deviation is in 2%, using fuzzy self-turning PID control, further eliminate static
Error improves control accuracy.
Claims (10)
1. a kind of catalytic oxidation treatment ammonia-contaminated gas electricity consumption heating and temperature control system, which is characterized in that including：Temperature sensor
(1), three phase electrical parameters collector (3), control module (4), benefit air valve (5), fan frequency converter (6), power regulator (7)；
Wherein,
It is mounted on the temperature sensor (1) in heating furnace and catalysis reacting furnace, the heating being respectively used in detection heating furnace
Reaction temperature in temperature and catalysis reacting furnace, and the temperature signal detected is sent to the control module (4)；
The three phase electrical parameters collector (3) connect with power regulator (7) output end, for acquiring electric heating tube in heating furnace
Voltage and current value, through operation obtain electric heating tube heating power, and by the voltage, electric current and performance number of electric heating tube pass
It is defeated by control module (4)；
The temperature signal and three phase electrical parameters collector (3) that the control module (4) provides according to temperature transmitter (2)
The voltage, electric current, performance number are provided, control command is generated, air valve (5), fan frequency converter (6) and electricity are mended for controlling
The working condition of power pressure regulator (7)；
The benefit air valve (5) regulates and controls the ammonia concentration in exhaust gas by adjusting its valve size；
The fan frequency converter (6) is used to adjust the air force of the frequency conversion fan of heating furnace；
The power regulator (7) is used to control the heating power of electric heating tube in heating furnace.
2. electrical heating temperature control system as described in claim 1, which is characterized in that be connected in the temperature transmitter (2)
Between temperature sensor (1) and control module (4), the temperature transmitter (2) will come from the temperature signal of temperature sensor (1)
Improve into the temperature signal convenient for transmitting at a distance.
3. electrical heating temperature control system as described in claim 1, which is characterized in that control module (4) is also associated with display circle
Face (8) is used to receive the control signal of operator, and is shown to the relevant parameter of system operation.
4. electrical heating temperature control system as described in claim 1, which is characterized in that be respectively mounted in heating furnace and catalysis reacting furnace
Multiple temperature sensors (1), control module (4) will be made after multiple heating temperature signals and multiple reaction temperature signal processings respectively
For actual heating temperature and reaction temperature, processing method is：
Step 4.1, temperature data is rejected into maximum value and minimum in array according to the array that is ranked sequentially into from small to large
Value；
Step 4.2, the minimum value x in access groupiT criterion judgements are carried out, calculates and removes minimum value xiAll array elements in addition
Average valueAnd standard deviation sigma；IfMinimum value x is then rejected from arrayi, then repeat this step；
Otherwise step 4.3 is carried out；Wherein, K (n, α) is the test coefficient of t distributions；
Step 4.3, the maximum value x in access groupjT criterion judgements are carried out, calculates and removes maximum value xjAll array elements in addition
Average valueAnd standard deviation sigma；IfMaximum value x is then rejected from arrayj, then repeat this step
Suddenly；Otherwise step 4.4 is carried out；Wherein, K (n, α) is the test coefficient of t distributions；
Step 4.4, remaining array element is averaged, using the average value as actual temperature value.
5. electrical heating temperature control system as described in claim 1, which is characterized in that air-valve is mended in control module (4) control
Door (5), fan frequency converter (6) and power regulator (7) the method for working condition be：
Step 5.1, according to wind speed needed for system, the working frequency of fan frequency converter is controlled, to control rotation speed of fan；
Step 5.2, if actual reaction temperature is more than in the reaction temperature upper limit set or heating furnace in catalysis reacting furnace
Heating temperature is more than the heating upper limit of setting, and continues 10 minutes or more, then closes heating furnace output, while exporting failure
Alarm signal；Otherwise step 5.3 is carried out；
Step 5.3, it if the deviation of the reaction temperature and actual reaction temperature set in catalysis reacting furnace is more than 10%, carries out
Step 5.4；If the deviation between 2%~10%, carries out step 5.5, if deviation is less than 2%, step 5.6 is carried out；
Step 5.4, according to the control voltage of heating temperature and power regulator output power respective value table output power pressure regulator,
The output power of power regulator is controlled, step 5.2 is carried out；
Step 5.5, according to two inputs, two output fuzzy controller, power regulator is controlled respectively and mends air valve, carries out step
5.2；
Step 5.6, fuzzy self-turning PID control is taken, the output power of power regulator is controlled, carries out step 5.2.
6. a kind of catalytic oxidation treatment ammonia-contaminated gas electricity consumption method for controlling heating temp of microwaven, which is characterized in that
Temperature in use sensor (1) measures heating temperature and reaction temperature, and the temperature signal measured is passed to control mould
Block (4)；
The voltage and current of electric heating tube in heating furnace is acquired by power regulator (7) using three phase electrical parameters collector (3)
Value, the heating power of electric heating tube is obtained through operation, and the voltage, electric current and performance number of electric heating tube are transferred to control module
(4)；
The temperature signal and three phase electrical parameters collector (3) that control module (4) is provided according to temperature transmitter (2) provide
The voltage, electric current, performance number generate control command, and air valve (5), fan frequency converter (6) and electric power tune are mended for controlling
The working condition of depressor (7)；Wherein, the benefit air valve (5) is dense to regulate and control the ammonia in exhaust gas by adjusting its valve size
Degree；The fan frequency converter (6) is used to adjust the air force of the frequency conversion fan of heating furnace；The power regulator (7) is used for
Control the heating power of electric heating tube in heating furnace.
7. electrical heating temperature control method as claimed in claim 6, which is characterized in that temperature sensor (1) is first by heating temperature
And reaction temperature signal is sent to temperature transmitter (2), the temperature transmitter (2) is by temperature signal regulation at convenient for long distance
Temperature signal from transmission is passing to control module (4).
8. electrical heating temperature control method as claimed in claim 6, which is characterized in that control module (4) is also associated with display circle
Face (8), operator controls signal by display interface (8) initialization system, and is shown to the relevant parameter of system operation.
9. electrical heating temperature control method as claimed in claim 6, which is characterized in that pacify in heating furnace and catalysis reacting furnace
Multiple temperature sensors (1) are filled, control module (4) respectively will be after multiple heating temperature signals and multiple reaction temperature signal processings
As actual heating temperature and reaction temperature, processing method is：
Step 4.1, temperature data is rejected into maximum value and minimum in array according to the array that is ranked sequentially into from small to large
Value；
Step 4.2, the minimum value x in access groupiT criterion judgements are carried out, calculates and removes minimum value xiAll array elements in addition
Average valueAnd standard deviation sigma；IfMinimum value x is then rejected from arrayi, then repeat this step；
Otherwise step 4.3 is carried out；Wherein, K (n, α) is the test coefficient of t distributions；
Step 4.3, the maximum value x in access groupjT criterion judgements are carried out, calculates and removes maximum value xjAll array elements in addition
Average valueAnd standard deviation sigma；IfMaximum value x is then rejected from arrayj, then repeat this step
Suddenly；Otherwise step 4.4 is carried out；Wherein, K (n, α) is the test coefficient of t distributions；
Step 4.4, remaining array element is averaged, using the average value as actual temperature value.
10. electrical heating temperature control method as claimed in claim 6, which is characterized in that air-valve is mended in control module (4) control
Door (5), fan frequency converter (6) and power regulator (7) the method for working condition be：
Step 5.1, according to wind speed needed for system, the working frequency of fan frequency converter is controlled, to control rotation speed of fan；
Step 5.2, if actual reaction temperature is more than in the reaction temperature upper limit set or heating furnace in catalysis reacting furnace
Heating temperature is more than the heating upper limit of setting, and continues 10 minutes or more, then closes heating furnace output, while exporting failure
Alarm signal；Otherwise step 5.3 is carried out；
Step 5.3, it if the deviation of the reaction temperature and actual reaction temperature set in catalysis reacting furnace is more than 10%, carries out
Step 5.4；If the deviation between 2%~10%, carries out step 5.5, if deviation is less than 2%, step S5.6 is carried out；
Step 5.4, according to the control voltage of heating temperature and power regulator output power respective value table output power pressure regulator,
The output power of power regulator is controlled, step 5.2 is carried out；
Step 5.5, according to two inputs, two output fuzzy controller, power regulator is controlled respectively and mends air valve, carries out step
5.2；
Step 5.6, fuzzy self-turning PID control is taken, the output power of power regulator is controlled, carries out step 5.2.
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| DE102017209257A1 (en) | 2017-06-01 | 2018-12-06 | Thyssenkrupp Ag | Process for the catalytic oxidation of ammonia gas |
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