CN115818928A - Automatic control method, device and system for natural gas calorific value fluctuation of TFT (thin film transistor) liquid crystal glass kiln - Google Patents
Automatic control method, device and system for natural gas calorific value fluctuation of TFT (thin film transistor) liquid crystal glass kiln Download PDFInfo
- Publication number
- CN115818928A CN115818928A CN202211449081.4A CN202211449081A CN115818928A CN 115818928 A CN115818928 A CN 115818928A CN 202211449081 A CN202211449081 A CN 202211449081A CN 115818928 A CN115818928 A CN 115818928A
- Authority
- CN
- China
- Prior art keywords
- natural gas
- heat
- kiln
- value
- total
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 414
- 239000003345 natural gas Substances 0.000 title claims abstract description 208
- 238000000034 method Methods 0.000 title claims abstract description 50
- 239000011521 glass Substances 0.000 title claims abstract description 33
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 30
- 239000010409 thin film Substances 0.000 title description 3
- 238000010438 heat treatment Methods 0.000 claims abstract description 78
- 239000007789 gas Substances 0.000 claims abstract description 41
- 238000002485 combustion reaction Methods 0.000 claims abstract description 28
- 238000012806 monitoring device Methods 0.000 claims abstract description 13
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 13
- 238000004364 calculation method Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 description 12
- 230000003828 downregulation Effects 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention provides a method, a device and a system for automatically controlling fluctuation of natural gas heat value of a TFT liquid crystal glass kiln, wherein the natural gas heat value is detected on line based on an automatic monitoring device for the natural gas heat value; the monitoring heat value data is connected to a pit furnace DCS control system, and the DCS control system calculates the total heating heat of the hot gas in the kiln through detecting the heat value and the usage amount of the natural gas in the kiln; the DCS monitors the total heating heat of the kiln natural gas as a target value, and if the heat value of the natural gas fluctuates, the DCS calculates the difference value between the current total heating heat of the kiln natural gas and the target value in real time; presetting a heating total heat difference threshold, if the heating total heat difference is larger than the heating total heat difference, calculating the natural gas amount to be adjusted by the DCS control system, and adjusting the gas amount of each combustion gun in proportion to complete the automatic control of the natural gas heat value fluctuation; thereby ensuring the stability of the total heating heat of the natural gas in the kiln and finally ensuring the stability of the process temperature of the kiln.
Description
Technical Field
The invention belongs to the technical field of TFT (thin film transistor) glass manufacturing, and particularly relates to a method, a device and a system for automatically controlling natural gas calorific value fluctuation of a TFT liquid crystal glass kiln.
Background
In the TFT liquid crystal glass production and manufacturing process, the kiln uses natural gas and oxygen for combustion supporting to heat the space above the glass liquid in the kiln,
the stability requirement of the TFT liquid crystal glass production and manufacture on the kiln process temperature is very high, and the fluctuation of the kiln temperature can cause the high occurrence of the defects of finished glass, thereby bringing adverse factors to the production and operation of production companies; at present, natural gas used by a TFT liquid crystal glass kiln is mainly provided by governments of all places, the stable supply can be ensured by adopting various natural gas sources in all the places, the natural gas components of the natural gas sources in all the places can have differences, the natural gas has different components and different heat values due to different production modes and production places, and the heat value of the natural gas in each cubic meter is 8000 kilocalories to 8500 kilocalories under the general condition.
The difference of natural gas calorific value can cause the difference of heat generated by the combustion of kiln natural gas, and finally cause the fluctuation of kiln process temperature, at present, the TFT liquid crystal glass kiln has no effective automatic control method for the fluctuation of process temperature caused by the fluctuation of natural gas calorific value, but when the kiln process temperature fluctuates, the natural gas calorific value is detected to confirm whether the calorific value has change, because the fluctuation of the kiln process temperature has a plurality of reasons, the kiln process temperature fluctuation can be caused by the factors such as kiln discharge quantity, liquid level, furnace pressure, electric melting heating system and the like, the natural gas calorific value change is only one of the factors, when the kiln process temperature is confirmed to be caused by the natural gas calorific value change, the natural gas flow is correspondingly adjusted by personnel, thereby stably controlling the kiln process temperature, and the coping method has lagged reaction, and measures are taken to adjust and control after the kiln process temperature change and the detection confirm of the calorific value change, so that the kiln process temperature exceeds the normal process control range for a long time, and the defect fluctuation of finished glass is caused.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the automatic control method, the device and the system for the fluctuation of the natural gas heat value of the TFT liquid crystal glass kiln, which can automatically control the fluctuation of the natural gas heat value in real time and improve the production quality and efficiency.
The invention is realized by the following technical scheme:
the automatic control method for the fluctuation of the natural gas calorific value of the TFT liquid crystal glass kiln comprises the following steps:
s1: carrying out on-line detection on the heat value of the natural gas based on an automatic monitoring device for the heat value of the natural gas;
s2: the monitoring heat value data is connected to a pit furnace DCS control system, and the DCS control system calculates the total heating heat of the hot gas in the kiln through detecting the heat value and the usage amount of the natural gas in the kiln;
s3: the DCS control system monitors the total heating heat of the kiln natural gas as a target value, and if the heat value of the natural gas fluctuates, the DCS system calculates the difference value between the current total heating heat of the kiln natural gas and the target value in real time;
s4: and presetting a heating total heat difference threshold, if the heating total heat difference is greater than the heating total heat difference, calculating the natural gas amount to be adjusted by the DCS control system, and adjusting the gas amount of each combustion gun in proportion to finish the automatic control of the natural gas heat value fluctuation.
Further, the total heating heat of the hot gas in the kiln day is as follows:
V1＝v1×Q1×g；
in the formula: v1 is the total gas quantity of natural gas, m 3 H; q1 is the natural gas calorific value when the process is stable, kcal/Nm3; g is the thermal efficiency of natural gas 60-70%; v1 is total heating quantity of natural gas in a kiln, kcal/Nm3.
Further, the amount of the natural gas to be adjusted is as follows:
V＝v1-(V1÷g÷Q2)；
in the formula: v1 is the total gas quantity of natural gas, m 3 H; q2 is real-time natural gas heating value, kcal/Nm3; g is the thermal efficiency of natural gas 60-70%; v1 is total heat of real-time heating of natural gas in a kiln, kcal/Nm3; v is the adjusted natural gas amount, m 3 /h。
Further, the proportion of each combustion gun in the total gas amount is as follows:
P＝H1÷v1；
L＝P×V；
in the formula: h1 is the gas quantity of each combustion gun, m 3 H; v1 is total gas amount of natural gas, m 3 H; p is the proportion of each combustion gun in the total gas amount; v is the total gas quantity m of the natural gas required to be adjusted 3 H; l is the amount of natural gas to be adjusted for each burning gun, m 3 /h。
Further, the amount of natural gas to be adjusted for each combustion gun is as follows:
L＝【{v1×Q2×g-(v1×Q1×g)}÷g÷Q2】×(H1÷v1)；
in the formula: l is the amount of natural gas to be adjusted for each combustion gun.
Further, the heating total heat difference threshold value is greater than 1% of the central value of the natural gas heat value.
The automatic control device for the fluctuation of the natural gas calorific value of the TFT liquid crystal glass kiln comprises a natural gas calorific value automatic monitoring device (2) and a DCS control system (3) which are sequentially connected in series on a natural gas pipeline (1);
the gas outlet end of the natural gas pipeline (1) is connected with a plurality of natural gas combustion guns (5);
the natural gas burning guns (5) are uniformly distributed on two sides of the kiln furnace (6), and electric natural gas flow regulating valves (4) are arranged on the natural gas burning guns.
Furthermore, the number of the natural gas burning guns (5) is six, and the gun heads penetrate through the outer wall of the kiln furnace (6).
TFT liquid crystal glazing kiln natural gas calorific value fluctuation automatic control system includes:
the heat value detection unit is used for carrying out on-line detection on the heat value of the natural gas based on the automatic monitoring device for the heat value of the natural gas;
the total heating heat of the natural gas is calculated by the calculation unit, the monitored heat value data is connected to the pit furnace DCS control system, and the DCS control system calculates the total heating heat of the natural gas of the kiln through detecting the heat value and the usage amount of the natural gas of the kiln;
the heating total heat difference calculation unit is used for monitoring the heating total heat of the kiln natural gas as a target value by the DCS control system, and if the heat value of the natural gas fluctuates, the DCS system calculates the heating total heat difference between the current heating total heat of the kiln natural gas and the target value in real time;
and the control unit is used for presetting a heating total heat difference value threshold, if the heating total heat difference value is greater than the heating total heat difference value, the DCS control system calculates the natural gas amount to be adjusted, and adjusts the gas amount of each combustion gun in proportion to complete the automatic control of natural gas heat value fluctuation.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention provides a method, a device and a system for automatically controlling fluctuation of natural gas heat value of a TFT liquid crystal glass kiln, wherein the natural gas heat value is detected on line based on an automatic monitoring device for the natural gas heat value; the monitoring heat value data is connected to a pit furnace DCS control system, and the DCS control system calculates the total heating heat of the hot gas in the kiln through detecting the heat value and the usage amount of the natural gas in the kiln; the DCS monitors the total heating heat of the kiln natural gas as a target value, and if the heat value of the natural gas fluctuates, the DCS calculates the difference value between the current total heating heat of the kiln natural gas and the target value in real time; presetting a heating total heat difference threshold, if the heating total heat difference is greater than the heating total heat difference, calculating the natural gas amount to be adjusted by the DCS control system, and adjusting the gas amount of each combustion gun in proportion to complete automatic control of natural gas heat value fluctuation; firstly, the stability of the heating quantity of the kiln natural gas is realized through the real-time monitoring and automatic control of the heat value of the natural gas, so that the fluctuation of the kiln process temperature caused by the change of the heat value of the natural gas is avoided, and favorable conditions are brought to the stable control of the product quality and the reduction of the production cost; meanwhile, the process temperature of the kiln is effectively stabilized by effectively controlling the fluctuation of the heat value of the natural gas, the corrosion of refractory materials caused by the process fluctuation of the kiln is reduced, the service life of the kiln is prolonged, and the production and operation cost is effectively reduced; finally, by effectively controlling the fluctuation of the heat value of the natural gas, when the temperature of the kiln fluctuates, the factor of the fluctuation of the process temperature of the kiln caused by the change of the heat value of the natural gas is eliminated, so that the analysis and treatment efficiency after the process temperature of the kiln fluctuates is improved, the process temperature of the kiln is recovered more timely, and the stability of the process temperature of the kiln is improved.
Drawings
FIG. 1 is a flow chart of an automatic control method for fluctuation of natural gas calorific value of a TFT liquid crystal glass kiln of the invention;
FIG. 2 is a schematic structural diagram of the automatic control device for the fluctuation of the natural gas calorific value of the TFT liquid crystal glass kiln.
In the figure: 1. a natural gas pipeline; 2. a natural gas calorific value automatic monitoring device; 3. a DCS control system; 4. an electric natural gas flow regulating valve; 5. a natural gas burning gun; 6. and (5) carrying out pit furnace.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention provides a TFT liquid crystal glass kiln natural gas calorific value fluctuation automatic control method, as shown in figure 1, comprising the following steps:
s1: carrying out on-line detection on the heat value of the natural gas based on an automatic monitoring device for the heat value of the natural gas;
s2: the monitoring heat value data is connected to a pit furnace DCS control system, and the DCS control system calculates the total heating heat of the hot gas in the kiln through detecting the heat value and the usage amount of the natural gas in the kiln;
s3: the DCS monitors the total heating heat of the kiln natural gas as a target value, and if the heat value of the natural gas fluctuates, the DCS calculates the difference value between the current total heating heat of the kiln natural gas and the target value in real time;
s4: presetting a heating total heat difference threshold, if the heating total heat difference is larger than the heating total heat difference, calculating the natural gas amount to be adjusted by the DCS control system, and adjusting the gas amount of each combustion gun in proportion to complete the automatic control of the natural gas heat value fluctuation.
Preferably, the total heating heat of the heat gas in the kiln day is as follows:
V1＝v1×Q1×g；
in the formula: v1 is the total gas quantity of natural gas, m 3 H; q1 is the natural gas calorific value when the process is stable, kcal/Nm3; g is the thermal efficiency of natural gas 60-70%; v1 is total heating quantity of natural gas in a kiln, kcal/Nm3.
Preferably, the amount of the natural gas to be adjusted is as follows:
V＝v1-(V1÷g÷Q2)；
in the formula: v1 is the total gas quantity of natural gas, m 3 H; q2 is real-time natural gas heating value, kcal/Nm3; g is the thermal efficiency of natural gas 60-70%; v1 is total heat of real-time heating of natural gas in a kiln, kcal/Nm3; v is the adjusted natural gas amount, m 3 /h。
Preferably, the proportion of each combustion gun in the total gas amount is as follows:
P＝H1÷v1；
L＝P×V；
in the formula: h1 is for each burningAir volume of gun, m 3 H; v1 is the total gas quantity of natural gas, m 3 H; p is the proportion of each combustion gun in the total gas amount; v is the total gas quantity m of the natural gas required to be adjusted 3 H; l is the amount of natural gas to be adjusted for each burning gun, m 3 /h。
Further, the amount of natural gas to be adjusted for each burner is as follows:
L＝【{v1×Q2×g-(v1×Q1×g)}÷g÷Q2】×(H1÷v1)；
in the formula: l is the amount of natural gas to be adjusted for each combustion gun.
Preferably, the heating total heat difference threshold is greater than 1% of the central value of the natural gas, specifically, according to analysis of long-term natural gas heat value detection data and process data of multiple line bodies of the kiln, the heat values of natural gases of different gas sources can be normally changed within the range of 1% of the central value of the heat value in the use process, the change range can not influence the kiln process, when natural gas source switching occurs, fluctuation of the heat value of the natural gas exceeding 1% of the central value can be caused, and fluctuation of the heat value exceeding 1% can influence the kiln process, so that when the automatic control system makes the heat value fluctuation exceed more than 1% of the central value, the automatic control device for the TFT liquid crystal glass kiln natural gas heat value fluctuation needs to be intervened and adjusted.
The invention provides a TFT liquid crystal glass kiln natural gas calorific value fluctuation automatic control device, as shown in figure 2, comprising a natural gas calorific value automatic monitoring device 2 and a DCS control system 3 which are sequentially connected in series on a natural gas pipeline 1;
the gas outlet end of the natural gas pipeline 1 is connected with a plurality of natural gas burning guns 5;
the natural gas burning guns 5 are uniformly distributed on two sides of the kiln 6, and electric natural gas flow regulating valves 4 are arranged on the natural gas burning guns.
Preferably, the number of the natural gas burning guns 5 is six, and the gun heads penetrate through the outer wall of the kiln 6.
The invention provides a TFT liquid crystal glass kiln natural gas calorific value fluctuation automatic control system, which comprises:
the heat value detection unit is used for carrying out on-line detection on the heat value of the natural gas based on the automatic monitoring device for the heat value of the natural gas;
the total heating heat of the natural gas is calculated by the calculation unit, the monitored heat value data is connected to a kiln DCS control system, and the DCS control system calculates the total heating heat of the natural gas of the kiln through the detected heat value and the usage amount of the natural gas of the kiln;
the heating total heat difference calculating unit is used for monitoring the heating total heat of the kiln natural gas as a target value by the DCS control system, and if the heat value of the natural gas fluctuates, the DCS system calculates the heating total heat difference between the current heating total heat of the kiln natural gas and the target value in real time;
and the control unit is used for presetting a heating total heat difference value threshold, if the heating total heat difference value is greater than the heating total heat difference value, the DCS control system calculates the natural gas amount to be adjusted, and adjusts the gas amount of each combustion gun in proportion to complete the automatic control of natural gas heat value fluctuation.
The invention provides a preferred embodiment as follows:
the heat value of the used natural gas is 8300 kcal, and the total using amount of the kiln natural gas is 60m 3 And h, putting into use 6 burning guns, wherein the 1# burning gun uses 9m 3 9m for the/h, 2# combustion gun 3 The/h, 3# burning gun uses 15m 3 The/h, 4# burning gun uses 15m 3 The/h, 5# burning gun uses 6m 3 6m for the No. 6/h burner 3 The temperature of the kiln process is stably controlled under the condition;
when the natural gas heat value automatic monitoring device carries out on-line detection on the natural gas heat value to find that the natural gas heat value suddenly fluctuates, the natural gas heat value suddenly fluctuates at the moment, the heat value detection value fluctuates from 8300 kcal to 8500 kcal from the fluctuation value, and the heat value fluctuation value is more than 1 percent, namely the preset heating total heat difference value threshold value is exceeded;
at the moment, the DCS adjusts the gas amount of the fuel gun, the control system calculates that the total heating amount of the kiln natural gas is increased from 323700kcal/Nm3 to 331500kcal/Nm3 after the heat value is changed, the total heat is increased by 7800kcal/Nm3, and the system calculates that 1.4m of the total natural gas needs to be reduced 3 H, each combustion gun is calculated according to the proportion, and the 1# combustion gun is 9m 3 H is adjusted to 8.79m 3 H, down-regulation of 0.21m 3 The combustion gun of the No. 2/h is 9m 3 H regulationTo 8.79m 3 H, down-regulation of 0.21m 3 The/h, 3# burning gun is composed of 15m 3 The volume/h is adjusted to 14.65m 3 H, down-regulation of 0.35m 3 The number of the/h, 4# burning gun is 15m 3 The volume/h is adjusted to 14.65m 3 H, down-regulation of 0.35m 3 The No. 5/h combustion gun is composed of 6m 3 H is adjusted to 5.86m 3 H, down-regulation by 0.14m 3 The 6 m/h 6# burning gun 3 H is adjusted to 5.86m 3 H, down-regulation by 0.14m 3 /h。
The adjustment instruction is issued and executed through the automatic calculation of the DCS, and finally the total heating quantity of the natural gas of the kiln is not changed after the heat value of the natural gas is changed, and the process temperature of the kiln is stable.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
- The automatic control method for the fluctuation of the natural gas calorific value of the TFT liquid crystal glass kiln is characterized by comprising the following steps:s1: carrying out on-line detection on the heat value of the natural gas based on an automatic monitoring device for the heat value of the natural gas;s2: the monitoring heat value data is connected to a pit furnace DCS control system, and the DCS control system calculates the total heating heat of the hot gas in the kiln through detecting the heat value and the usage amount of the natural gas in the kiln;s3: the DCS monitors the total heating heat of the kiln natural gas as a target value, and if the heat value of the natural gas fluctuates, the DCS calculates the difference value between the current total heating heat of the kiln natural gas and the target value in real time;s4: presetting a heating total heat difference threshold, if the heating total heat difference is larger than the heating total heat difference, calculating the natural gas amount to be adjusted by the DCS control system, and adjusting the gas amount of each combustion gun in proportion to complete the automatic control of the natural gas heat value fluctuation.
- 2. The TFT liquid crystal glass kiln natural gas calorific value fluctuation automatic control method according to claim 1, wherein the total heating heat of the kiln day hot gas is as follows:V1＝v1×Q1×g；in the formula: v1 is the total gas quantity of natural gas, m 3 H; q1 is the natural gas calorific value at the time of stable process, kcal/Nm3; g is the thermal efficiency of natural gas 60-70%; v1 is total heating quantity of kiln natural gas, kcal/Nm3.
- 3. The TFT liquid crystal glass kiln natural gas calorific value fluctuation automatic control method according to claim 1, wherein the natural gas amount required to be adjusted is as follows:V＝v1-(V1÷g÷Q2)；in the formula: v1 is the total gas quantity of natural gas, m 3 H; q2 is real-time natural gas heating value, kcal/Nm3; g is the thermal efficiency of natural gas 60-70%; v1 is total heat of real-time heating of kiln natural gas, kcal/Nm3; v is the adjusted natural gas amount, m 3 /h。
- 4. The TFT liquid crystal glass kiln natural gas calorific value fluctuation automatic control method according to claim 1, wherein the proportion of each combustion gun to the total gas amount is as follows:P＝H1÷v1；L＝P×V；in the formula: h1 is the gas flow of each burning gun, m 3 H; v1 is total gas amount of natural gas, m 3 H; p is the proportion of each combustion gun in the total gas amount; v is the total gas quantity m of the natural gas required to be adjusted 3 H; l is the amount of natural gas to be adjusted for each burning gun, m 3 /h。
- 5. The automatic control method for the natural gas calorific value fluctuation of the TFT liquid crystal glass kiln according to claim 4, wherein the natural gas amount required to be adjusted for each burning gun is as follows:L＝【{v1×Q2×g-(v1×Q1×g)}÷g÷Q2】×(H1÷v1)；in the formula: l is the amount of natural gas to be adjusted for each combustion gun.
- 6. The automatic control method for natural gas calorific value fluctuation of the TFT liquid crystal glass kiln according to claim 1, wherein the heating total heat difference threshold is more than 1% of the natural gas calorific value center value.
- The automatic control device for the fluctuation of the natural gas calorific value of the TFT liquid crystal glass kiln is characterized by comprising a natural gas calorific value automatic monitoring device (2) and a DCS control system (3) which are sequentially connected in series on a natural gas pipeline (1) based on the automatic control method for the fluctuation of the natural gas calorific value of the TFT liquid crystal glass kiln in any item of claims 1 to 6;the gas outlet end of the natural gas pipeline (1) is connected with a plurality of natural gas combustion guns (5);the natural gas burning guns (5) are uniformly distributed on two sides of the kiln furnace (6), and electric natural gas flow regulating valves (4) are arranged on the natural gas burning guns.
- 8. The automatic control device for the fluctuation of the natural gas calorific value of the TFT liquid crystal glass kiln furnace according to claim 7, wherein the number of the natural gas burning guns (5) is six, and the gun heads penetrate through the outer wall of the kiln furnace (6).
- The automatic control system for the fluctuation of the natural gas heat value of the TFT liquid crystal glass kiln is characterized in that the automatic control method for the fluctuation of the natural gas heat value of the TFT liquid crystal glass kiln based on any item in claims 1 to 6 comprises the following steps:the heat value detection unit is used for carrying out on-line detection on the heat value of the natural gas based on the automatic monitoring device for the heat value of the natural gas;the total heating heat of the natural gas is calculated by the calculation unit, the monitored heat value data is connected to a kiln DCS control system, and the DCS control system calculates the total heating heat of the natural gas of the kiln through the detected heat value and the usage amount of the natural gas of the kiln;the heating total heat difference calculation unit is used for monitoring the heating total heat of the kiln natural gas as a target value by the DCS control system, and if the heat value of the natural gas fluctuates, the DCS system calculates the heating total heat difference between the current heating total heat of the kiln natural gas and the target value in real time;and the control unit is used for presetting a heating total heat difference value threshold value, if the heating total heat difference value is greater than the heating total heat difference value, the DCS control system calculates the natural gas amount to be adjusted, and adjusts the gas amount of each combustion gun in proportion to complete automatic control of natural gas heat value fluctuation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211449081.4A CN115818928A (en) | 2022-11-18 | 2022-11-18 | Automatic control method, device and system for natural gas calorific value fluctuation of TFT (thin film transistor) liquid crystal glass kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211449081.4A CN115818928A (en) | 2022-11-18 | 2022-11-18 | Automatic control method, device and system for natural gas calorific value fluctuation of TFT (thin film transistor) liquid crystal glass kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115818928A true CN115818928A (en) | 2023-03-21 |
Family
ID=85529302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211449081.4A Pending CN115818928A (en) | 2022-11-18 | 2022-11-18 | Automatic control method, device and system for natural gas calorific value fluctuation of TFT (thin film transistor) liquid crystal glass kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115818928A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101294239A (en) * | 2007-04-24 | 2008-10-29 | 宝山钢铁股份有限公司 | Reutilization method for annealing oven protective atmosphere |
| CN108977649A (en) * | 2018-08-01 | 2018-12-11 | 首钢智新迁安电磁材料有限公司 | A kind of environment protection control method of natural gas annealing furnace |
| CN111766779A (en) * | 2020-06-30 | 2020-10-13 | 日照钢铁控股集团有限公司 | Converter gas and natural gas mixed heat value ratio stable control method |
| CN213456654U (en) * | 2020-11-02 | 2021-06-15 | 河北华通燃气设备有限公司 | Heat value gas meter |
| CN114857947A (en) * | 2022-05-07 | 2022-08-05 | 信义环保特种玻璃（江门）有限公司 | Natural gas flow monitoring circuit and flow adjusting device |
| CN115046598A (en) * | 2022-04-13 | 2022-09-13 | 成都秦川物联网科技股份有限公司 | Natural gas energy metering and assigning system and method based on Internet of things |
| CN217482530U (en) * | 2021-09-28 | 2022-09-23 | 华能河南中原燃气发电有限公司 | Natural gas supply system for gas turbine body |
-
2022
- 2022-11-18 CN CN202211449081.4A patent/CN115818928A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101294239A (en) * | 2007-04-24 | 2008-10-29 | 宝山钢铁股份有限公司 | Reutilization method for annealing oven protective atmosphere |
| CN108977649A (en) * | 2018-08-01 | 2018-12-11 | 首钢智新迁安电磁材料有限公司 | A kind of environment protection control method of natural gas annealing furnace |
| CN111766779A (en) * | 2020-06-30 | 2020-10-13 | 日照钢铁控股集团有限公司 | Converter gas and natural gas mixed heat value ratio stable control method |
| CN213456654U (en) * | 2020-11-02 | 2021-06-15 | 河北华通燃气设备有限公司 | Heat value gas meter |
| CN217482530U (en) * | 2021-09-28 | 2022-09-23 | 华能河南中原燃气发电有限公司 | Natural gas supply system for gas turbine body |
| CN115046598A (en) * | 2022-04-13 | 2022-09-13 | 成都秦川物联网科技股份有限公司 | Natural gas energy metering and assigning system and method based on Internet of things |
| CN114857947A (en) * | 2022-05-07 | 2022-08-05 | 信义环保特种玻璃（江门）有限公司 | Natural gas flow monitoring circuit and flow adjusting device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109385285B (en) | Coke oven self-heating optimizing system | |
| US20160161119A1 (en) | Apparatus and method of controlling combustion exhaust for regenerative heating furnace | |
| CN112760439B (en) | Undisturbed furnace change control method for hot blast furnace | |
| CN115818928A (en) | Automatic control method, device and system for natural gas calorific value fluctuation of TFT (thin film transistor) liquid crystal glass kiln | |
| KR20090030515A (en) | Heater for annealing furnace | |
| CN106591526A (en) | Flow-free combustion control system for blast furnace hot blast stove | |
| RU2010154390A (en) | GLASS FURNACE | |
| CN116499272A (en) | Intelligent kiln control method for tracking multi-energy combustion carbon emission | |
| CN108870997B (en) | A kind of quantitative heat supply method | |
| US20180372315A1 (en) | Electronic control module and method for controlling the operation and safety of at least one radiant tube burner | |
| CN109141015A (en) | Double-hearth lime kiln two close cycles temperature control equipment and its application method | |
| CN213350798U (en) | Automatic baking system of ladle roaster | |
| CN110732661A (en) | kinds of ladle baking device intelligent control system | |
| CN211232945U (en) | Multi-fuel pure oxygen combustion system | |
| CN213272612U (en) | Automatic air-fuel ratio adjusting device for regenerative burner | |
| CN103664008A (en) | Low-temperature control process for oven baking of annular sleeve kiln | |
| KR101205069B1 (en) | Apparatus and method for controlling injection of fuel-gas | |
| CN114317859B (en) | Air supply strategy correction method for hot blast stove | |
| CN109298726B (en) | Method and system for heating EDC cracking furnace | |
| JP5479467B2 (en) | Burner assembly with improved adaptability and furnace having the burner assembly | |
| CN212156662U (en) | Crude oil heating furnace | |
| CN110777242B (en) | Oxidation-reduction protection device of stainless steel tube heat treatment furnace | |
| CN114908203B (en) | Method, device and application for electrically heating reducing gas | |
| US5302177A (en) | Tin float bath for manufacturing sheet glass utilizing recuperative gas burners | |
| CN113739570A (en) | Automatic control system and control method for circulating air temperature of annular sleeve kiln |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |