CN113819757A - Rotary kiln and control system for optimizing combustion of rotary kiln - Google Patents
Rotary kiln and control system for optimizing combustion of rotary kiln Download PDFInfo
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- CN113819757A CN113819757A CN202110998297.5A CN202110998297A CN113819757A CN 113819757 A CN113819757 A CN 113819757A CN 202110998297 A CN202110998297 A CN 202110998297A CN 113819757 A CN113819757 A CN 113819757A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/42—Arrangement of controlling, monitoring, alarm or like devices
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Abstract
The invention provides a rotary kiln and a control system for optimizing combustion of the rotary kiln. The control system includes: the tail gas content detection module and the air quantity regulation module; the tail gas content detection module is positioned in a boiler tail flue area of the rotary kiln, is connected with the air volume adjusting module, and is used for detecting the content of each smoke component in the boiler tail flue area and sending the content of each smoke component to the air volume adjusting module; and the air quantity adjusting module is connected with the combustor of the rotary kiln and used for receiving the content of each smoke component and determining the optimal combustion-supporting air quantity introduced into the combustor according to the content of each smoke component and the current air speed. And the current wind speed is the wind speed before air volume adjustment is carried out according to the optimal combustion-supporting air volume. The invention can realize the combustion optimization control of the rotary kiln, enhance the self-adaptive capacity of the control system to field equipment, gas pressure and heat value changes, contribute to saving the fuel cost and improve the product quality output by the rotary kiln.
Description
Technical Field
The invention relates to the technical field of rotary kilns, in particular to a control system for optimizing combustion of a rotary kiln and the rotary kiln.
Background
The rotary kiln is a rotary calcining kiln (commonly called rotary kiln) and belongs to the metallurgical equipment. Rotary kilns can be divided into cement kilns, metallurgical chemical kilns and lime kilns according to the different materials to be treated. Wherein, the metallurgical chemical kiln is mainly used for magnetizing and roasting the lean iron ore in the steel plant in the metallurgical industry; oxidizing and roasting chromium and nickel iron ores; roasting bauxite in a refractory material plant, roasting clinker in an aluminum plant and aluminum hydroxide; roasting chromium ore sand, chromium ore powder and other minerals in a chemical plant. Lime kilns (i.e., active lime kilns) are used for roasting active lime and lightly calcined dolomite used in steel plants and iron and alloy plants.
At present, most of combustion operations of the metallurgical rotary kiln in China are in a manual operation mode or a single-loop automatic control mode, sudden changes of gas pressure, gas heat value and the like cannot be overcome in time, so that temperature control in the kiln is unstable, optimal economic combustion is difficult to realize, and the method is a main factor influencing the quality and the conversion rate of the metallurgical rotary kiln. Not only wastes coal gas resources but also aggravates environmental pollution, and is one of the reasons for higher running cost of the metallurgical rotary kiln.
Disclosure of Invention
The embodiment of the invention provides a rotary kiln and a control system for optimizing combustion of the rotary kiln, and aims to solve the problem that the optimal combustion is difficult to realize in the combustion control operation of the conventional rotary kiln.
In a first aspect, an embodiment of the present invention provides a control system for optimizing combustion of a rotary kiln, including: the tail gas content detection module and the air quantity regulation module;
the tail gas content detection module is positioned in a boiler tail flue area of the rotary kiln, is connected with the air volume adjusting module, and is used for detecting the content of each smoke component in the boiler tail flue area and sending the content of each smoke component to the air volume adjusting module;
and the air quantity adjusting module is connected with a burner of the rotary kiln and used for receiving the content of each smoke component and determining the optimal combustion-supporting air quantity introduced into the burner according to the content of each smoke component and the current air speed introduced into the burner.
In a possible implementation manner, the air volume adjusting module is configured to determine a combustion degree of fuel in the combustor according to a content and a preset content of each flue gas component; and determining the current air volume introduced into the combustor according to the current air speed, and determining the optimal combustion-supporting air volume introduced into the combustor according to the combustion degree and the current air volume, wherein the preset content is the content of each smoke component when the fuel is fully combusted.
In a possible implementation manner, the air volume adjusting module is further configured to determine an optimal combustion-supporting air volume introduced into the combustor according to the content of each smoke component, the current air speed, and the fuel release amount.
In a possible implementation manner, the tail gas content detection module is further configured to generate content exceeding information when detecting that the content of any smoke component exceeds a preset content threshold;
the control system for optimizing combustion of the rotary kiln further comprises: an intelligent voice alarm module;
the intelligent voice alarm module is connected with the tail gas content detection module, receives the content exceeding information sent by the tail gas content detection module and carries out voice alarm.
In a possible implementation manner, the control system for optimizing combustion of a rotary kiln further includes: a wireless temperature measurement module;
the wireless temperature measurement module is connected with the intelligent voice alarm module and used for measuring the temperature of the inner cavity of the rotary kiln and sending temperature overrun information to the intelligent voice alarm module when the temperature of the inner cavity exceeds a temperature threshold value, so that the intelligent voice alarm module carries out voice alarm according to the received temperature overrun information.
In one possible implementation manner, the wireless temperature measurement module comprises a thermocouple sensor and a wireless transmission unit;
the sensing end of the thermocouple sensor extends to the inner cavity of the rotary kiln, the connecting end of the thermocouple sensor is connected with the wireless transmission unit, and the wireless transmission unit is connected with the intelligent voice alarm module.
In a possible implementation manner, the control system for optimizing combustion of a rotary kiln further includes: a safety amplitude limiting module;
the safety amplitude limiting module is connected with the intelligent voice alarm module and used for storing the safety opening and the safety change rate corresponding to each control loop in the rotary kiln, carrying out amplitude limiting on the actual opening and the actual change rate corresponding to each control loop according to the safety opening and the safety change rate, and sending control amplitude overrun information to the intelligent voice alarm module when the actual opening and the actual change rate exceed the corresponding safety opening and the safety change rate, so that the intelligent voice alarm module carries out voice alarm according to the received amplitude overrun information.
In a possible implementation manner, the control system for optimizing combustion of a rotary kiln further includes: a communication fault automatic switching module;
the communication fault automatic switching module is connected with the intelligent voice alarm module and used for detecting whether a communication fault occurs in a control system for optimizing combustion of the rotary kiln, switching the control of the rotary kiln to a distributed control system when the communication fault occurs in the control system for optimizing combustion of the rotary kiln, sending communication fault information to the intelligent voice alarm module, and performing voice alarm by the intelligent voice alarm module according to the received communication fault information.
In a possible implementation manner, the control system for optimizing combustion of a rotary kiln further includes: a security processing module;
the safety processing module is connected with the intelligent voice alarm module and used for detecting whether each instrument in the rotary kiln has a fault or not, processing data corresponding to a certain instrument when the certain instrument has the fault, sending instrument fault information to the intelligent voice alarm module, and performing voice alarm by the intelligent voice alarm module according to the received instrument fault information.
In a second aspect, embodiments of the present invention provide a rotary kiln, including a control system for optimizing combustion of the rotary kiln as described in the first aspect or any one of the possible implementations of the first aspect.
The embodiment of the invention provides a rotary kiln and a control system for optimizing combustion of the rotary kiln. The method comprises the steps of detecting the content of each smoke component in a boiler tail flue region through a tail gas content detection module, sending the content of each smoke component to an air volume adjusting module, receiving the content of each smoke component by the air volume adjusting module, and determining the optimal combustion-supporting air volume introduced into a combustor according to the content of each smoke component and the current air velocity introduced into the combustor. The air quantity of the burner introduced into the rotary kiln is adjusted according to the optimal combustion-supporting air quantity, so that the combustion optimization control of the rotary kiln can be realized, meanwhile, the air quantity is adjusted according to the content of each smoke component, the self-adaptive capacity of a control system to field equipment, coal gas pressure and heat value changes is enhanced, the control of each gradient temperature in the rotary kiln is more accurate, the fuel cost is saved, and the product quality of the rotary kiln is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a control system for optimizing combustion in a rotary kiln according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a rotary kiln according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following description is made by way of specific embodiments with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a control system for optimizing combustion of a rotary kiln according to an embodiment of the present invention. Fig. 2 is a schematic structural diagram of a rotary kiln, and a control system for optimizing combustion of the rotary kiln according to an embodiment of the present invention is described with reference to fig. 1 and fig. 2. The control system for optimizing combustion of the rotary kiln provided by the embodiment of the invention comprises: the device comprises a tail gas content detection module 10 and an air quantity adjusting module 20.
The tail gas content detection module 10 is positioned in a boiler tail flue area of the rotary kiln, is connected with the air volume adjusting module 20, and is used for detecting the content of each smoke component in the boiler tail flue area and sending the content of each smoke component to the air volume adjusting module 20; and the air quantity adjusting module 20 is connected with the combustor of the rotary kiln and is used for receiving the content of each smoke component and determining the optimal combustion-supporting air quantity introduced into the combustor according to the content of each smoke component and the current air speed introduced into the combustor.
Referring to fig. 2, when the rotary kiln works, materials enter the kiln and enter a preheating zone along with the rotation of the kiln body, the preheated materials enter a roasting zone, the roasting temperature is reached under the heating of high-temperature flue gas generated by fuel, and roasted clinker enters a cooling zone and is discharged from the rotary kiln after being cooled. In the process, the content of each smoke component in the tail flue area of the boiler mainly refers to SO2And NOXDue to the combustion of the fuel, a small amount of SO is accompanied with high-temperature flue gas2And NOXAccording to SO2And NOXThe oxygen content of the tail flue area of the boiler can be determined, and then whether the fuel is fully combusted or not can be determined. The tail gas content detection module is used for detecting the content of each smoke component in the area of the tail flue of the boiler, so that whether fuel is fully combusted or not can be judged, when the fuel is not fully combusted, the optimal combustion-supporting air quantity introduced into a combustor is determined continuously through the content of each smoke component and the current air speed, the self-optimizing and rolling optimizing functions of the air-coal ratio can be realized, the air-coal ratio is kept optimal when the rotary kiln is fired, the coal gas consumption is saved, and meanwhile, the oxygen content of the flue is stabilized.
After the optimal combustion-supporting air quantity introduced into the combustor is determined, the control system for optimizing combustion of the rotary kiln can only adjust the analog quantity output of the valve and the air door, and does not influence any safety processing measures such as interlocking in the original control system (such as a distributed control system) of the rotary kiln. The switching picture of the control system for optimizing combustion of the rotary kiln can be designed in the original DCS control system of the rotary kiln, when the control system for optimizing combustion of the rotary kiln is not put into operation, the control system for optimizing combustion of the rotary kiln is completely separated from the original DCS control system of the rotary kiln, and even if the control system for optimizing combustion of the rotary kiln is powered off, the original DCS control system of the rotary kiln cannot be influenced.
Optionally, the air volume adjusting module 20 is configured to determine a combustion degree of the fuel in the combustor according to the content and the preset content of each flue gas component; and determining the current air volume introduced into the combustor according to the current air speed, and determining the optimal combustion-supporting air volume introduced into the combustor according to the combustion degree and the current air volume.
Wherein the preset content is the content of each smoke component when the fuel is fully combusted.
Optionally, the tail gas content detection module may further detect the content of each flue gas component in the area where the burner is located, and may determine the initial combustion-supporting air volume according to the content of each flue gas component in the area where the burner is located and the current air speed; according to the content of each smoke component in the tail flue region of the boiler and the current wind speed, the air quantity adjustment quantity can be determined; and determining the optimal combustion-supporting air quantity introduced into the combustor according to the initial combustion-supporting air quantity and the air quantity regulating quantity.
Optionally, the air volume adjusting module 20 is further configured to determine an optimal combustion-supporting air volume introduced into the combustor according to the content of each flue gas component, the current air speed, and the fuel release amount.
For the operation of a rotary kiln production device, the key for ensuring the high quality, high yield and normal operation of the rotary kiln is that the air consumption of the rotary kiln provides enough oxygen for the sufficient combustion of the fuel, namely the air consumption depends on the fuel release amount. The air volume set value for full combustion of the fuel can be calculated according to the fuel release amount, the air volume can be introduced into the combustor according to different current air speeds of the air blower according to the air volume set value, and the different current air speeds can correspond to different control signals so as to control the analog output of the valve and the air door. According to different current wind speeds and the content of each smoke component in the tail flue area of the boiler, the set value of the air volume can be adjusted, and finally the optimal combustion-supporting air volume is determined.
The embodiment can realize the adjustment and optimization of the monomer combustion through detecting the content of each smoke component in the area where the combustor is located, combine the content of each smoke component in the area of the tail flue of the boiler, realize the optimization of the whole combustion of the rotary kiln boiler, after determining the optimal combustion-supporting air quantity, change the content of each smoke component in the area of the tail flue of the rotary kiln boiler through controlling the air speed, control each gradient temperature in the kiln more accurately, enhance the self-adaptive capacity of the control system to field equipment, gas pressure and heat value change, contribute to saving the fuel cost and improve the product quality of the rotary kiln.
Optionally, the tail gas content detecting module 10 may be further configured to generate content exceeding information when detecting that the content of any smoke component exceeds a preset content threshold.
The control system for optimizing combustion of the rotary kiln may further include: and an intelligent voice alarm module 30.
The intelligent voice alarm module 30 is connected with the tail gas content detection module 10, receives the content exceeding information sent by the tail gas content detection module 10, and performs voice alarm.
Optionally, the control system for optimizing combustion of the rotary kiln can further comprise a wireless temperature measuring module, a safety amplitude limiting module, a communication fault automatic switching module and a safety processing module, the tail gas content detection module and the wireless temperature measuring module, the safety amplitude limiting module, the communication fault automatic switching module and the safety processing module are connected with an intelligent voice alarm module, so that the intelligent voice alarm module can accommodate main operation faults of the rotary kiln into the intelligent voice alarm module, when a certain fault occurs or is about to occur, the intelligent voice alarm module can alarm through real voice or synthesized voice, so that fault points can be directly located, fault diagnosis time is shortened, and timely processing by operators is facilitated.
Optionally, the control system for optimizing combustion of the rotary kiln may further include: and a wireless temperature measuring module 40.
The wireless temperature measuring module 40 is connected with the intelligent voice alarm module 30 and used for measuring the temperature of the inner cavity of the rotary kiln, and sending temperature overrun information to the intelligent voice alarm module 30 when the temperature of the inner cavity exceeds a temperature threshold value, so that the intelligent voice alarm module 30 can perform voice alarm according to the received temperature overrun information.
Optionally, the wireless temperature measuring module 40 includes a thermocouple sensor and a wireless transmission unit.
Wherein, the induction end of thermocouple sensor extends to the inner chamber of rotary kiln, and the link and the wireless transmission unit of thermocouple sensor are connected, and wireless transmission unit is connected with intelligent audio alert module 30.
The rotary kiln is divided into three temperature zones from the kiln tail to the kiln head, namely a preheating zone, a roasting zone and a cooling zone. Because different materials have different technological requirements on the lengths and the temperatures of the preheating zone, the roasting zone and the cooling zone, and the requirements are directly related to the yield, the quality, the consumption of raw materials, the cost and the like of products, the control of the temperature in the rotary kiln is extremely important.
For the monitoring of the temperature in the rotary kiln, because the kiln barrel body does continuous rotary motion, the temperature measuring element arranged in the barrel body is inconvenient for leading wires, and the temperature information is not easy to transmit, therefore, the contact type temperature measuring mode is greatly limited in the temperature monitoring of the rotary kiln. At present, the temperature monitoring of the rotary kiln at home and abroad basically adopts non-contact measurement except for a laggard observation mode of manually watching fire at the kiln head, wherein infrared scanning detection is taken as a mainstream, the surface temperature of a target object is measured by receiving the energy emitted, reflected and transmitted by the target object, and then the determined functional relationship between the temperature of the inner wall of the kiln and the surface temperature of a kiln cylinder is quantitatively analyzed according to the heat transfer principle, so that the temperature distribution in the kiln is obtained. However, this method has hysteresis, and the measurement accuracy is also affected by various factors such as the coordinates of the temperature detection point, the detection time, and the surrounding environment.
In the embodiment, a thermocouple sensor for sensing the temperature of the inner cavity of the rotary kiln is arranged on the kiln barrel of the rotary kiln, the sensing end of the thermocouple sensor extends to the inner cavity of the rotary kiln, and the thermocouple sensor is connected with the wireless transmission module. The thermocouple sensor can adopt a flexible armored thermocouple, and the armored thermocouple can be provided with a bending allowance so as to overcome the displacement of the measuring part of the rotary kiln when the rotary kiln cylinder body does rotary motion and improve the reliability and the anti-interference capability of a wireless temperature measurement model of the rotary kiln. The connecting end of the thermocouple sensor is connected with the wireless transmission unit, and the wireless transmission unit is in communication connection with the control system and the intelligent voice alarm module, so that the temperature in the rotary kiln can be monitored and controlled. The sampling period and the battery maintenance period of the wireless temperature measurement module can be designed according to the monitoring and control requirements on the temperature in the rotary kiln.
Illustratively, according to the actual production requirements of the rotary kiln and the measuring point requirements of a control system for optimizing combustion of the rotary kiln, each kiln can be provided with two sets of wireless temperature measuring modules, and the wireless temperature measuring modules have the characteristics of adjustable sampling period, long battery maintenance period and the like which meet the actual requirements on site.
Optionally, the control system for optimizing combustion of the rotary kiln may further include: a safety clipping module 50.
The safety amplitude limiting module 50 is connected with the intelligent voice alarm module 30 and used for storing the safety opening and the safety change rate corresponding to each control loop in the rotary kiln, carrying out amplitude limiting on the actual opening and the actual change rate corresponding to each control loop according to the safety opening and the safety change rate, and sending control amplitude over-limit information to the intelligent voice alarm module 30 when the actual opening and the actual change rate exceed the corresponding safety opening and the safety change rate, so that the intelligent voice alarm module 30 carries out voice alarm according to the received amplitude over-limit information.
The rotary kiln can comprise a fuel control loop, a combustion-supporting air control loop, a temperature control loop and the like. In the embodiment, the safety amplitude limiting module is designed in the control system for optimizing combustion of the rotary kiln, so that the safety opening and the safety change rate of normal operation of the rotary kiln can be designed for each control loop, and the potential safety hazard caused by model calculation errors or manual misoperation due to abnormal measurement is avoided.
The optimized output and control of the control system for optimizing combustion of the rotary kiln in this embodiment may be an increment that is changed according to a change of a working condition and a change of a scheduling instruction on the basis of the control of the original DCS control system of the rotary kiln, and the safety opening and the safety change rate designed by the safety amplitude limiting module may be the safety opening and the safety change rate of the increment, that is, the output range of the increment is limited.
Optionally, the control system for optimizing combustion of the rotary kiln may further include: and a communication failure automatic switching module 60.
The communication fault automatic switching module 60 is connected to the intelligent voice alarm module 30, and is configured to detect whether a communication fault occurs in the control system for optimizing combustion of the rotary kiln, switch the control of the rotary kiln to the distributed control system when the communication fault occurs in the control system for optimizing combustion of the rotary kiln, and send communication fault information to the intelligent voice alarm module 30, so that the intelligent voice alarm module 30 performs voice alarm according to the received communication fault information.
For example, the communication failure automatic switching module may adopt an OLE (OLE for Process Control, OPC) communication protocol for Process Control to communicate with the original DCS Control system of the rotary kiln, and when the OPC communication between the Control system for optimizing combustion of the rotary kiln and the original DCS Control system of the rotary kiln is abnormal and does not automatically recover within a certain time, the Control system for optimizing combustion of the rotary kiln of this embodiment may automatically switch the Control right to the original DCS Control system side of the rotary kiln without disturbance and send an alarm. So as to improve the stability of the whole control system of the rotary kiln.
Optionally, the control system for optimizing combustion of the rotary kiln may further include: a secure processing module 70.
The safety processing module 70 is connected to the intelligent voice alarm module 30, and is configured to detect whether each instrument in the rotary kiln has a fault, process data corresponding to a certain instrument when the certain instrument has the fault, and send instrument fault information to the intelligent voice alarm module 30, so that the intelligent voice alarm module 30 performs voice alarm according to the received instrument fault information.
In this embodiment, the safety processing module may be a safety processing module in the event of an instrument failure, and mainly includes three processing scenarios: firstly, the measuring instrument is inaccurate, secondly, for the completely invalid instrument, thirdly, for the valve or the fluid coupling with bad characteristics, etc. According to the embodiment, the safety processing module is used for processing the data corresponding to the instrument in the corresponding scene, so that the stability and the fault handling capacity of the whole control system of the rotary kiln can be improved.
Optionally, the control system for optimizing combustion of the rotary kiln in this embodiment may further be connected to a remote control cloud service system, a remote interaction function is provided between the two systems, and two terminal functions, namely, a user side and a management side, may be implemented through the remote control cloud service system. A user at a user end can press a remote service application key on a screen at any time when needed, a remote control cloud service system can transmit information to a service center server through a public network, an information issuing platform of the server can automatically issue the information to a management end, and the management end can realize on-site service by opening a notebook computer capable of being connected with the internet; the management terminal can initiate an active service request to the site, corresponding dialog box information appears on a screen of a control system for optimizing combustion of the site rotary kiln, and a user can immediately enjoy corresponding multimedia services after responding.
The combustion of the vanadium extraction rotary kiln is optimally controlled by utilizing the rotary kiln combustion optimizing control system, and the expected benefits are calculated as follows:
(1) the predicted benefits of saving gas:
daily consumption of mixed gas: 30 ten thousand meters3Saving coal gas: 3 percent. Annual coal gas saving 297 ten thousand m3Per m, of3The mixed gas is 0.48 yuan, and the gas saving benefit is estimated to be 142.56 ten thousand yuan per year.
(2) Improvement of conversion yield expected benefit:
vanadium slag of 20 ten thousand tons/year, vanadium slag grade (turn V)2O5) 8.72% of V2O5The price is 8 ten thousand yuan/ton, the conversion rate is improved by 1 percent, and the annual benefit is as follows: 20 ten thousand tons/year 8.72% 8 ten thousand yuan/ton 1%, 1395.2 ten thousand yuan/year.
(3) Calculating the investment recovery period:
the project investment recovery period is 135/(142.56+1395.2) 1.05 months.
Therefore, the control system for optimizing combustion of the rotary kiln can improve the self-adaptive capacity of the control system to field equipment, gas pressure and heat value changes by optimizing the combustion process in the rotary kiln, so that the air-coal ratio required by the rotary kiln process is optimal, the optimal economic combustion is realized, a large amount of gas resources are saved, the running cost of the rotary kiln is reduced, the conversion rate of vanadium slag roasting is improved, and the control system has higher practical value.
The control system for optimizing combustion of the rotary kiln comprises a tail gas content detection module, an air volume adjusting module, a wireless temperature measuring module, a safety amplitude limiting module, a communication fault automatic switching module, a safety processing module and an intelligent voice alarm module. Through wireless temperature measurement module, safe amplitude limiting module, communication trouble automatic switch-over module, safety processing module and intelligent voice alarm module, can make control system safety and stability operation. The effect promotion of stable production, reduction workman intensity of labour, reduction fuel consumption, improvement product quality and production security has been realized on the whole.
The invention also comprises a rotary kiln, which comprises the control system for optimizing combustion of the rotary kiln of any embodiment, and has the same beneficial effects as the control system for optimizing combustion of the rotary kiln of any embodiment.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting 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 technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A control system for optimizing combustion in a rotary kiln, comprising: the tail gas content detection module and the air quantity regulation module;
the tail gas content detection module is positioned in a boiler tail flue area of the rotary kiln, is connected with the air volume adjusting module, and is used for detecting the content of each smoke component in the boiler tail flue area and sending the content of each smoke component to the air volume adjusting module;
and the air quantity adjusting module is connected with a burner of the rotary kiln and used for receiving the content of each smoke component and determining the optimal combustion-supporting air quantity introduced into the burner according to the content of each smoke component and the current air speed introduced into the burner.
2. The rotary kiln combustion optimization control system as claimed in claim 1, wherein the air volume adjusting module is configured to determine the combustion degree of the fuel in the burner according to the content and the preset content of each flue gas component; and determining the current air volume introduced into the combustor according to the current air speed, and determining the optimal combustion-supporting air volume introduced into the combustor according to the combustion degree and the current air volume, wherein the preset content is the content of each smoke component when the fuel is fully combusted.
3. The rotary kiln combustion optimization control system as claimed in claim 1, wherein the air volume adjusting module is further configured to determine an optimal combustion-supporting air volume introduced into the burner according to the content of each smoke component, the current air speed, and the fuel release amount.
4. The rotary kiln combustion optimization control system as claimed in any one of claims 1 to 3, wherein the tail gas content detection module is further configured to generate content exceeding information when detecting that the content of any flue gas component exceeds a preset content threshold;
the control system for optimizing combustion of the rotary kiln further comprises: an intelligent voice alarm module;
the intelligent voice alarm module is connected with the tail gas content detection module, receives the content exceeding information sent by the tail gas content detection module and carries out voice alarm.
5. The control system for optimizing combustion of a rotary kiln as recited in claim 4, further comprising: a wireless temperature measurement module;
the wireless temperature measurement module is connected with the intelligent voice alarm module and used for measuring the temperature of the inner cavity of the rotary kiln and sending temperature overrun information to the intelligent voice alarm module when the temperature of the inner cavity exceeds a temperature threshold value, so that the intelligent voice alarm module carries out voice alarm according to the received temperature overrun information.
6. The rotary kiln combustion optimization control system as claimed in claim 5, wherein the wireless temperature measurement module comprises a thermocouple sensor and a wireless transmission unit;
the sensing end of the thermocouple sensor extends to the inner cavity of the rotary kiln, the connecting end of the thermocouple sensor is connected with the wireless transmission unit, and the wireless transmission unit is connected with the intelligent voice alarm module.
7. The control system for optimizing combustion of a rotary kiln as recited in claim 4, further comprising: a safety amplitude limiting module;
the safety amplitude limiting module is connected with the intelligent voice alarm module and used for storing the safety opening and the safety change rate corresponding to each control loop in the rotary kiln, carrying out amplitude limiting on the actual opening and the actual change rate corresponding to each control loop according to the safety opening and the safety change rate, and sending amplitude overrun information to the intelligent voice alarm module when the actual opening and the actual change rate exceed the corresponding safety opening and the safety change rate, so that the intelligent voice alarm module carries out voice alarm according to the received amplitude overrun information.
8. The control system for optimizing combustion of a rotary kiln as recited in claim 4, further comprising: a communication fault automatic switching module;
the communication fault automatic switching module is connected with the intelligent voice alarm module and used for detecting whether a communication fault occurs in a control system for optimizing combustion of the rotary kiln, switching the control of the rotary kiln to a distributed control system when the communication fault occurs in the control system for optimizing combustion of the rotary kiln, sending communication fault information to the intelligent voice alarm module, and performing voice alarm by the intelligent voice alarm module according to the received communication fault information.
9. The control system for optimizing combustion of a rotary kiln as recited in claim 4, further comprising: a security processing module;
the safety processing module is connected with the intelligent voice alarm module and used for detecting whether each instrument in the rotary kiln has a fault or not, processing data corresponding to a certain instrument when the certain instrument has the fault, sending instrument fault information to the intelligent voice alarm module, and performing voice alarm by the intelligent voice alarm module according to the received instrument fault information.
10. A rotary kiln comprising a control system for optimizing combustion in a rotary kiln as claimed in any one of claims 1 to 9.
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| CN202110998297.5A CN113819757A (en) | 2021-08-27 | 2021-08-27 | Rotary kiln and control system for optimizing combustion of rotary kiln |
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| CN202110998297.5A CN113819757A (en) | 2021-08-27 | 2021-08-27 | Rotary kiln and control system for optimizing combustion of rotary kiln |
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| CN202110998297.5A Pending CN113819757A (en) | 2021-08-27 | 2021-08-27 | Rotary kiln and control system for optimizing combustion of rotary kiln |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060127717A1 (en) * | 2004-12-14 | 2006-06-15 | General Electric Company | High temperature protection of fuel cell system combustor and other components via water or water or water vapor injection |
| CN103162309A (en) * | 2013-03-05 | 2013-06-19 | 福建南方路面机械有限公司 | Intelligent combustion system and control method thereof |
| CN204851480U (en) * | 2015-04-17 | 2015-12-09 | 深圳市英臣科技有限公司 | Emulsion fuel combustion system |
| CN106247396A (en) * | 2016-08-25 | 2016-12-21 | 邢红涛 | A kind of control system of burner optimization burning |
| CN113063153A (en) * | 2021-04-29 | 2021-07-02 | 江苏绿平环保科技有限公司 | Self-adjusting rotary kiln internal combustion temperature system |
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- 2021-08-27 CN CN202110998297.5A patent/CN113819757A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060127717A1 (en) * | 2004-12-14 | 2006-06-15 | General Electric Company | High temperature protection of fuel cell system combustor and other components via water or water or water vapor injection |
| CN103162309A (en) * | 2013-03-05 | 2013-06-19 | 福建南方路面机械有限公司 | Intelligent combustion system and control method thereof |
| CN204851480U (en) * | 2015-04-17 | 2015-12-09 | 深圳市英臣科技有限公司 | Emulsion fuel combustion system |
| CN106247396A (en) * | 2016-08-25 | 2016-12-21 | 邢红涛 | A kind of control system of burner optimization burning |
| CN113063153A (en) * | 2021-04-29 | 2021-07-02 | 江苏绿平环保科技有限公司 | Self-adjusting rotary kiln internal combustion temperature system |
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