CN107178789B - Combustion monitoring method, device and system of natural gas combustor - Google Patents

Combustion monitoring method, device and system of natural gas combustor Download PDF

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Publication number
CN107178789B
CN107178789B CN201610133736.5A CN201610133736A CN107178789B CN 107178789 B CN107178789 B CN 107178789B CN 201610133736 A CN201610133736 A CN 201610133736A CN 107178789 B CN107178789 B CN 107178789B
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natural gas
combustion
measurement result
sensor
combustion controller
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CN107178789A (en
Inventor
吕松军
佰索德·科斯特林
唐仕云
佰恩德·普拉德
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Siemens Energy Global GmbH and Co KG
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Siemens AG
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Priority to CN201610133736.5A priority Critical patent/CN107178789B/en
Priority to EP17762531.6A priority patent/EP3418636B1/en
Priority to PCT/CN2017/075984 priority patent/WO2017152845A1/en
Publication of CN107178789A publication Critical patent/CN107178789A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/005—Regulating fuel supply using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2221/00—Pretreatment or prehandling
    • F23N2221/10—Analysing fuel properties, e.g. density, calorific
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/20—Warning devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2241/00—Applications
    • F23N2241/20—Gas turbines

Abstract

The invention provides a method, a device and a system for monitoring combustion of a natural gas combustor. The method comprises the steps of obtaining a measurement result of a gas analyzer on natural gas sampled in an air inlet pipeline, determining control information corresponding to the measurement result according to a preset control model, and adjusting the flow of the natural gas in the air inlet pipeline of a natural gas combustor. The invention can realize the pre-control of the natural gas burner and reduce the main risk of the combustion of the natural gas burner.

Description

Combustion monitoring method, device and system of natural gas combustor
Technical Field
The invention relates to the field of combustors, in particular to a method, a device and a system for monitoring combustion of a natural gas combustor.
Background
Natural gas becomes increasingly hazardous as the hydrogen content in natural gas increases. Hydrogen is more flammable than pure methane, being flammable from 4% to 75% by volume, and methane is 5% to 15%, has 15 times less ignition energy and 8 times higher burning rate than methane, and is therefore more explosive than methane.
The main risks underlying the combustion of natural gas burners in conditions of high hydrogen content are:
burner overheating due to flashback (flash back) due to high reactivity of hydrogen;
combustion instability due to chemical changes different from natural gas combustion due to faster movement of hydrogen;
an increase in nitrogen oxide emissions due to the higher adiabatic combustion temperature of hydrogen.
In the prior art, temperature monitoring is usually performed by installing a thermocouple at the flame exit of the burner, and triggering different protection operations based on the monitored temperature signal. This method only controls the risk of overheating in the combustion of natural gas, and it is not possible to avoid combustion instability and increased emissions of nitrogen oxides.
Disclosure of Invention
In view of this, one of the problems addressed by one embodiment of the present invention is to reduce the main risk of natural gas burner combustion.
According to an embodiment of the invention, a combustion monitoring method of a natural gas burner is provided, wherein the natural gas burner is connected with an air inlet pipeline, the air inlet pipeline is connected with a natural gas combustion control system, the natural gas combustion control system comprises a gas analyzer and a combustion controller, and the method comprises the following steps: the gas analyzer samples from the gas inlet pipeline and analyzes the sampled natural gas to obtain a measurement result, wherein the measurement result comprises gas components and corresponding contents in the natural gas; the gas analyzer sends the measurement result to the combustion controller; the combustion controller inputs the measurement result into a preset control model to determine control information corresponding to the measurement result, wherein the control model is related to the gas component in the natural gas and the corresponding content; and the combustion controller adjusts the natural gas flow in the air inlet pipeline of the natural gas combustor according to the control information.
Optionally, the natural gas combustion control system further comprises at least any one of a dynamic sensor, an emissions sensor, a temperature sensor, the dynamic sensor being arranged in a combustion chamber of the natural gas burner, the emissions sensor being arranged downstream of the natural gas burner, the temperature sensor being arranged on the natural gas burner, the combustion monitoring method further comprising: the combustion controller acquires at least any one signal of a dynamic signal of the dynamic sensor, an emission signal of the emission sensor and a temperature signal of the temperature sensor to serve as a feedback signal; wherein the step of the combustion controller determining the control information comprises: the combustion controller inputs the measurement result and the feedback signal into a preset control model to determine control information corresponding to the measurement result and the feedback signal, wherein the control model is related to the content of the gas component in the natural gas and the corresponding content and the feedback signal.
Optionally, the control model is adjusted in real time according to the feedback signal.
Optionally, the control logic of the preset control model is further associated with the arrangement position of the sensor.
Optionally, each type of sensor arranged on one of the natural gas burners comprises one or more, wherein the combustion monitoring method further comprises: if at least any one of the arranged sensors in each type fails, the combustion controller triggers alarm information.
Optionally, the combustion monitoring method further comprises: the combustion controller determines the current corresponding risk level according to the gas components and the corresponding content in the measurement result; triggering an operation corresponding to the risk level.
Optionally, when the combustion controller further obtains the feedback signal, the step of determining a risk level comprises: and the combustion controller determines the current corresponding risk grade according to the gas components and the corresponding contents in the measurement result and by combining the feedback signal.
Optionally, the gas composition and corresponding content is a hydrogen content.
According to an embodiment of the present invention, there is provided a combustion monitoring method of a natural gas burner at a combustion controller terminal, wherein the method includes: obtaining a measurement result of natural gas in an air inlet pipeline of the natural gas burner, wherein the measurement result comprises gas components and corresponding contents in the natural gas; inputting the measurement result into a preset control model to determine control information corresponding to the measurement result, wherein the control model is related to the gas component in the natural gas and the corresponding content; and adjusting the natural gas flow in the air inlet pipeline of the natural gas combustor according to the control information.
Optionally, the combustion monitoring method further comprises: acquiring at least any one signal of a dynamic sensor of the natural gas combustor, a discharge signal of a discharge sensor and a temperature signal of a temperature sensor to serve as a feedback signal; wherein the step of determining control information comprises: inputting the measurement result and the feedback signal into a preset control model to obtain control information corresponding to the measurement result and the feedback signal, wherein the control model is related to the gas component in the natural gas and the corresponding content and the feedback signal.
Optionally, the combustion monitoring method further comprises: determining the current corresponding risk grade according to the gas components and the corresponding contents in the measurement result; triggering an operation corresponding to the risk level.
According to an embodiment of the present invention, there is provided a natural gas combustion control system, wherein the natural gas combustion control system includes a gas analyzer and a combustion controller: the gas analyzer is connected with a gas inlet pipeline of the natural gas combustor and is used for sampling from the gas inlet pipeline; analyzing the sampled natural gas to obtain a measurement result, wherein the measurement result comprises gas components and corresponding contents in the natural gas; and sending the measurement to the combustion controller; the combustion controller includes: an acquisition unit for acquiring a measurement result sent by the gas analyzer; a determining unit, configured to input the measurement result into a preset control model to determine control information corresponding to the measurement result, where the control model is related to a corresponding content of a gas component in the natural gas; and the adjusting unit is used for adjusting the natural gas flow in the air inlet pipeline of the natural gas combustor according to the control information.
Optionally, the natural gas combustion control system further comprises at least any one of a dynamic sensor, an emissions sensor, a temperature sensor, the dynamic sensor being arranged in a combustion chamber of the natural gas burner, the emissions sensor being arranged downstream of the natural gas burner, the temperature sensor being arranged on the natural gas burner, the combustion controller further comprising: the feedback unit is used for acquiring at least any one signal of a dynamic signal of the dynamic sensor, a discharge signal of the discharge sensor and a temperature signal of the temperature sensor to serve as a feedback signal; wherein the determination unit is configured to: inputting the measurement result and the feedback signal into a preset control model to determine control information corresponding to the measurement result and the feedback signal, wherein the control model is related to the gas component and the corresponding content in the natural gas and the feedback signal.
Optionally, the control model relates gas composition and corresponding content in the natural gas and the feedback signal
Optionally, the control logic of the preset control model is further associated with the arrangement position of the sensor.
Optionally, each type of sensor disposed on one of the natural gas burners comprises one or more, wherein the combustion controller further comprises: and the alarm unit is used for triggering alarm information if at least any one of the arranged sensors in each type fails.
Optionally, the combustion controller further comprises: the wind control unit is used for determining the current corresponding risk level according to the gas components and the corresponding content in the measurement result; a triggering unit for triggering an operation corresponding to the risk level.
Optionally, when the combustion controller further comprises the feedback unit, the wind control unit is configured to: and determining the current corresponding risk level according to the gas components and the corresponding contents in the measurement results and by combining the feedback signals.
Optionally, the gas composition and corresponding content is a hydrogen content.
According to an embodiment of the present invention, there is provided a combustion controller for combustion monitoring of a natural gas combustor, wherein the combustion controller includes: the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring a measurement result of natural gas in an air inlet pipeline of the natural gas burner, and the measurement result comprises gas components and corresponding contents in the natural gas; a determining unit, configured to input the measurement result into a preset control model to determine control information corresponding to the measurement result, where the control model is related to a corresponding content of a gas component in the natural gas; and the adjusting unit is used for adjusting the natural gas flow in the air inlet pipeline of the natural gas combustor according to the control information.
Optionally, the combustion controller further comprises: the feedback unit is used for acquiring at least any one signal of a dynamic sensor of the natural gas combustor, a discharge signal of a discharge sensor and a temperature signal of a temperature sensor to serve as a feedback signal; wherein the determination unit is configured to: inputting the measurement result and the feedback signal into a preset control model to obtain control information corresponding to the measurement result and the feedback signal, wherein the control model is related to the gas component in the natural gas and the corresponding content and the feedback signal.
Optionally, the combustion controller further comprises: the wind control unit is used for determining the current corresponding risk level according to the gas components and the corresponding content in the measurement result; a triggering unit for triggering an operation corresponding to the risk level.
According to the embodiment of the invention, the combustion of the natural gas burner is not controlled only according to the temperature after combustion and the like, but the natural gas combusted by the natural gas burner is directly subjected to gas analysis to obtain the measurement result, and the measurement result is input into the preset control model to determine the control information corresponding to the measurement result, so that the flow of the natural gas in the air inlet pipeline of the natural gas burner is adjusted according to the control information. By utilizing the mode, the combustion condition of the natural gas combustor can be accurately pre-judged, the control hysteresis is solved, and various main risks of the natural gas combustor are reduced. In addition, the embodiment of the invention can also determine the control information or adjust the control information by combining the feedback signals of various sensors, thereby further improving the accuracy of control.
Drawings
Other features, advantages and benefits of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Fig. 1 shows a natural gas combustion system architecture diagram using a natural gas combustion control system according to an embodiment of the present invention.
Fig. 2 shows a natural gas combustion system architecture diagram using a natural gas combustion control system according to another embodiment of the present invention.
FIG. 3 is a block diagram of a combustion controller according to one embodiment of the invention.
FIG. 4 is a block diagram of a combustion controller according to another embodiment of the invention.
FIG. 5 is a block diagram of a combustion controller according to another embodiment of the invention.
FIG. 6 is a system flow diagram of a combustion controller control method employing a natural gas combustion control system, according to an embodiment of the invention.
FIG. 7 is a flow chart of a combustion controller control method according to an embodiment of the invention.
FIG. 8 is a flow chart of a combustion controller control method according to another embodiment of the present invention.
FIG. 9 is a flow chart of a combustion controller control method according to another embodiment of the invention.
FIG. 10 is a schematic diagram of a natural gas burner incorporating two sensors according to an embodiment of the present invention.
FIG. 11 is a block diagram of a combustion controller according to one embodiment of the invention.
To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures.
Detailed Description
Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It will be apparent to those skilled in the art upon reading the following description that the teachings of the present invention can readily be utilized in combustion monitoring and control systems. The method, system and apparatus of the present invention are applicable to both premixed burners and diffusion burners. Preferably, the present invention is applicable to a Gas Turbine (Gas Turbine).
Fig. 1 shows a natural gas combustion system architecture diagram using a natural gas combustion control system according to an embodiment of the present invention. The natural gas combustion control system includes a combustion controller 10 and a gas analyzer 20. The system architecture shown in FIG. 1 is only one example of an application of a natural gas combustion control system.
The combustion controller 10 is connected to the gas analyzer 20 and the control valve 50 in the intake duct 30 by means of a wired connection or a wireless connection to acquire signals transmitted from the gas analyzer 20 and to transmit or acquire information to the control valve 50 in the intake duct 30.
The gas analyzer 20 is connected to the intake conduit 30 of the natural gas burner 40, and this connection enables the gas analyzer 20 to sample the intake conduit 30, i.e. to obtain a sample of the natural gas burned by the natural gas burner 40.
The gas analyzer 20 analyzes the sampled natural gas to obtain measurement results of various types of gas components and corresponding contents contained in the natural gas. Here, the analysis method includes two ways: first, the content of the gas contained in the natural gas is analyzed based on a predetermined gas composition, for example, preferably, the content of hydrogen in the natural gas is predetermined and analyzed, and the gas analyzer 20 analyzes and measures the content of hydrogen in the natural gas, such as the content of hydrogen is 15%; second, the gas analyzer 20 first analyzes component categories of various gases contained in the natural gas, such as methane, ethane, carbon dioxide, nitrogen, hydrogen sulfide, and the like, and then determines gas contents corresponding to the respective gas components based on the analyzed gas components, respectively.
The gas analyzer 20 then sends the measurement result to the combustion controller 10.
After obtaining the measurement result, the combustion controller 10 inputs the measurement result as input data into a preset control model, and directly or indirectly determines control information corresponding to the measurement result according to an output result of the control model on the input data. Wherein the control model is associated with a corresponding content of gas components in the natural gas. For example, the control model may directly include different control information corresponding to different natural gas components and contents; or, the control model includes different intake air flow rates corresponding to different natural gas components and contents, and the combustion controller 10 determines corresponding control information, such as increasing the flow rate or decreasing the flow rate, according to the intake air flow rate.
Those skilled in the art will understand that, the control model may be presented in the form of a two-dimensional or multi-dimensional curve, such as the abscissa axis representing the hydrogen content value and the ordinate axis representing the natural gas flow value; but also tables or other presentation means.
Wherein, the determination of the control model can comprise two modes: first, based on manual settings; second, real-time adjustments are made based on the feedback signal based on default settings. Here, the feedback signal may be various kinds of sensor signals described below.
The combustion controller 10 adjusts the flow rate of the natural gas in the intake duct 30 of the natural gas burner 40 by adjusting the control valve 50 based on the control information. It will be understood by those skilled in the art that other adjustment means than the adjustment of the control valve 50 can be adapted to the present invention, and are also included within the scope of the present invention and are incorporated herein by reference.
Preferably, the combustion controller 10 may also determine a current corresponding risk level, e.g. a high risk level, a medium risk level, a low risk level, based on said measurements. Taking the measurement of hydrogen content as an example:
if the hydrogen content exceeds the normal limit and reaches a low risk level, sending alarm information;
triggering the natural gas burner 40 to shut down if the hydrogen content exceeds normal limits and reaches a medium risk level;
if the hydrogen content exceeds normal limits and reaches a high risk level, the natural gas burner 40 is triggered to trip.
Preferably, the combustion controller 10 may also determine the current corresponding risk level and trigger the corresponding operation in combination with other signals. For example, if the hydrogen content exceeds normal limits and reaches a high risk level while the growl of the natural gas burner 40 exceeds a certain level for a certain duration, the natural gas burner 40 is triggered to trip. The growl may be obtained by placing a growl sensor on the natural gas combustor 40.
Fig. 2 shows a natural gas combustion system architecture diagram using a natural gas combustion control system according to another embodiment of the present invention. The natural gas combustion control system comprises a combustion controller 10, a gas analyzer 20, a temperature sensor 701, a temperature sensor 702, a dynamic sensor 80 and an emission sensor 90. The system architecture shown in FIG. 2 is only one example of an application of a natural gas combustion control system that may be applied in a gas turbine using a premix combustor.
The combustion controller 10 is connected to the gas analyzer 20 and the control valve 50 in the intake duct 30 by means of a wired connection or a wireless connection to acquire signals transmitted from the gas analyzer 20 and to transmit or acquire information to the control valve 50 in the intake duct 30.
The gas analyzer 20 is connected to the intake conduit 30 of the natural gas burner 40, and this connection enables the gas analyzer 20 to sample the intake conduit 30, i.e. to obtain a sample of the natural gas burned by the natural gas burner 40.
The gas analyzer 20 analyzes the sampled natural gas to obtain measurement results of various types of gas components and corresponding contents contained in the natural gas. Here, the analysis method includes two ways: first, the content of the gas contained in the natural gas is analyzed based on a predetermined gas composition, for example, preferably, the content of hydrogen in the natural gas is predetermined and analyzed, and the gas analyzer 20 analyzes and measures the content of hydrogen in the natural gas, such as the content of hydrogen is 15%; second, the gas analyzer 20 first analyzes component categories of various gases contained in the natural gas, such as methane, ethane, carbon dioxide, nitrogen, hydrogen sulfide, and the like, and then determines gas contents corresponding to the respective gas components based on the analyzed gas components, respectively.
The gas analyzer 20 then sends the measurement result to the combustion controller 10.
Temperature sensors 701 and 702 are located on the natural gas burner 40 to measure the burner temperature, which may be any device capable of measuring the natural gas burner temperature, such as a thermocouple (thermocouple).
The emissions sensor 90 is disposed downstream of the natural gas burner 40, where those skilled in the art will appreciate the location of the emissions sensor. An emissions sensor 90(emission sensor) is capable of measuring the combustion emissions of the natural gas burner 40.
A dynamic sensor 80(dynamic sensor) is arranged in the combustion chamber of the natural gas burner, capable of measuring combustion dynamics in the combustion chamber. For simplicity, the specific combustion chamber is not shown, the position of the dynamic sensor 80 is only shown schematically, and those skilled in the art can understand the arrangement position of the dynamic sensor 80.
The number of temperature sensors, emission sensors, dynamic sensors is only indicated here by way of example and does not mean that only individual sensors can be arranged at the respective positions. Those skilled in the art can arrange two or more sensors of the same type for each system or for each burner, based on the actual needs. Further, one or more of the three types of sensors described above may be disposed on the combustor.
Here, it will be appreciated by those skilled in the art that for ease of illustration and clarity, a two-stage natural gas burner 40 and associated equipment is shown in fig. 2; for example, control valve 601, control valve 602, annular parent pipe (piping) 1001, annular parent pipe 1002, distribution branch (distribution branch)301, distribution branch 302, etc. In the natural gas combustion system architecture, the natural gas combustion system can comprise one or two or more stages of natural gas burners and corresponding devices matched with the natural gas burners, such as a combustion controller, a gas analyzer, various sensors and the like.
Preferably, if the natural gas combustion system architecture shown in fig. 2 is applied to a gas turbine, the control valve 601 and the control valve 602 may be control devices for controlling the premixed gas and the duty gas, respectively.
The temperature sensors 701 and 702 transmit corresponding temperature signals to the combustion controller 10, the dynamic sensor 80 transmits corresponding dynamic signals to the combustion controller 10, and the emission sensor 90 transmits corresponding emission signals to the combustion controller 10; accordingly, the combustion controller 10 takes at least any one of the above signals as a feedback signal.
Then, the combustion controller 10 inputs the measurement result and the feedback signal as input data into a preset control model, and determines control information corresponding to the measurement result and the feedback signal directly or indirectly according to an output result of the control model on the input data. Wherein the control model is related to the gas composition and corresponding content in the natural gas and the feedback signal.
For example, the control model may directly include different control information corresponding to different feedback signals under different natural gas components and contents; or, the control model includes different natural gas components and contents, and different intake air flow rates corresponding to different feedback signals, and the like, and then the combustion controller 10 determines corresponding control information, such as increasing the flow rate or decreasing the flow rate, according to the intake air flow rate.
Those skilled in the art will appreciate that the control model may be presented as a multidimensional curve, such as one axis of abscissa representing the hydrogen content, one or more axes of abscissa representing the value of a feedback signal, and one or more axes of ordinate representing the natural gas flow value; but also tables or other presentation means.
Wherein, the determination of the control model can comprise two modes: first, based on manual settings; second, real-time adjustments are made based on the feedback signal based on default settings.
Preferably, the control logic of the control model is also related to the arrangement position of the sensor. The control logic is a logic for determining a corresponding output (i.e. corresponding control information) based on a certain input (i.e. the type and corresponding value of the feedback signal). And when the arrangement positions of the sensors are different, the control information corresponding to the same feedback signals is different.
For example, if the temperature sensor 701 is located closer to the flame than the temperature sensor 702 is located at the natural gas burner 40, the control model for the temperature sensor 701 is different from the control model for the temperature sensor 702, for example, the alarm temperature of the former is higher than the alarm temperature of the latter.
The combustion controller 10 adjusts the natural gas flow rate in the intake duct 30 of the natural gas burner 40 by adjusting at least one of the control valve 50, the control valve 601, and the control valve 602 based on the control information. It should be understood by those skilled in the art that other adjustment methods besides adjusting the control valve 50, the control valve 601, and the control valve 602 can be applied to the present invention, and are included in the scope of the present invention and are also included herein by reference.
Preferably, each type of sensor disposed on one of the natural gas burners includes one or more, and the combustion controller 10 triggers a warning message if at least any one of each type of sensors disposed fails.
Taking fig. 10 as an example, fig. 10 shows a schematic diagram of a natural gas burner comprising two sensors according to an embodiment of the invention. Two temperature sensors 701,702 are arranged on the natural gas burner 40, which together detect the temperature of the natural gas burner. If one of the temperature sensors, for example, the temperature sensor 701 fails, the combustion controller 10 no longer acquires a temperature signal from the temperature sensor 701, and therefore determines that the temperature sensor 701 fails and issues an alarm message.
Preferably, when the combustion controller 10 further obtains the feedback signal, the combustion controller 10 may determine the current corresponding risk level according to the gas component and the corresponding content in the measurement result, in combination with the feedback signal. For example, if the hydrogen content exceeds the normal limit while the emission signal of the emission sensor 90 indicates that the emission content exceeds the standard, it may be determined that the current corresponding risk level is an intermediate risk level; if the hydrogen content exceeds the normal limit, and meanwhile, the emission signal of the emission sensor 90 shows that the emission content exceeds the standard and the temperature signal of the temperature sensor 701 or 702 shows high temperature, the current corresponding risk level can be determined to be a high risk level; or if the value of the hydrogen content exceeding the normal limit is high while the temperature signal of the temperature sensor 701 or 702 shows a high temperature, it may be determined that the currently corresponding risk level is a high risk level.
It will be understood by those skilled in the art that the foregoing description is by way of example only, and not limiting of the invention, and that other combinations of determining the risk level are equally applicable to the present invention and are within the scope of the invention.
FIG. 3 is a block diagram of a combustion controller according to one embodiment of the invention. The combustion controller 10 includes an acquisition unit 101, a determination unit 102, and an adjustment unit 103.
The obtaining unit 101 obtains a measurement result of the natural gas in the intake duct of the natural gas burner, wherein the measurement result includes a gas component in the natural gas and a corresponding content.
The obtaining unit 101 may interact with a device such as a gas analyzer to obtain a measurement result sent by the gas analyzer, and the obtaining unit 101 may also interact with other devices capable of providing the measurement result to obtain the measurement result.
After acquiring the measurement result, acquiring section 101 transmits the measurement result to determining section 102. The determining unit 102 inputs the measurement result as input data into a preset control model, and directly or indirectly determines control information corresponding to the measurement result according to an output result of the control model on the input data. Wherein the control model is associated with a corresponding content of gas components in the natural gas. For example, the control model may directly include different control information corresponding to different natural gas components and contents; or, the control model includes different intake air flow rates corresponding to different natural gas components and contents, and the combustion controller 10 determines corresponding control information, such as increasing the flow rate or decreasing the flow rate, according to the intake air flow rate.
Those skilled in the art will understand that, the control model may be presented in the form of a two-dimensional or multi-dimensional curve, such as the abscissa axis representing the hydrogen content value and the ordinate axis representing the natural gas flow value; but also tables or other presentation means.
Wherein, the determination of the control model can comprise two modes: first, based on manual settings; second, real-time adjustments are made based on the feedback signal based on default settings.
The determining unit 102 sends the control information to the adjusting unit 103, and the adjusting unit 103 adjusts the natural gas flow rate in the intake duct of the natural gas burner by adjusting, for example, a control valve located on the intake duct of the natural gas burner, according to the control information. It will be understood by those skilled in the art that other adjustment means than adjusting the control valve can be adapted to the present invention, and are also included within the scope of the present invention and are incorporated herein by reference.
FIG. 4 is a block diagram of a combustion controller according to another embodiment of the invention. The combustion controller 10 includes an acquisition unit 101, a determination unit 102, an adjustment unit 103, and a feedback unit 104.
The obtaining unit 101 and the adjusting unit 103 are the same as or similar to the corresponding devices shown in fig. 3, and therefore are not described herein again and are included herein by way of reference.
The feedback unit 104 interacts with a sensor corresponding to the natural gas burner or other devices capable of providing corresponding signals to obtain at least any one of a dynamic signal of the dynamic sensor of the natural gas burner, a discharge signal of the discharge sensor, and a temperature signal of the temperature sensor as a feedback signal.
Then, the determining unit 102 obtains the measurement result sent by the obtaining unit 101 and obtains a feedback signal sent by the feedback unit 104, inputs the measurement result and the feedback signal as input data into a preset control model, and directly or indirectly determines control information corresponding to the measurement result and the feedback signal according to an output result of the control model on the input data. Wherein the control model is related to the gas composition and corresponding content in the natural gas and the feedback signal.
For example, the control model may directly include different control information corresponding to different feedback signals under different natural gas components and contents; or, the control model includes different natural gas components and contents, and different intake air flow rates corresponding to different feedback signals, and the like, and then the determining unit 102 determines corresponding control information, such as increasing the flow rate or decreasing the flow rate, according to the intake air flow rate.
Those skilled in the art will appreciate that the control model may be presented as a multidimensional curve, such as one axis of abscissa representing the hydrogen content, one or more axes of abscissa representing the value of a feedback signal, and one or more axes of ordinate representing the natural gas flow value; but also tables or other presentation means.
Wherein, the determination of the control model can comprise two modes: first, based on manual settings; second, real-time adjustments are made based on the feedback signal based on default settings.
Preferably, the control logic of the control model is also related to the arrangement position of the sensor. The control logic is a logic for determining a corresponding output (i.e. corresponding control information) based on a certain input (i.e. the type and corresponding value of the feedback signal). And when the arrangement positions of the sensors are different, the control information corresponding to the same feedback signals is different.
For example, if a certain temperature sensor is located closer to the flame than another temperature sensor is located at the natural gas burner, the control model for the former is different from the control model for the latter, for example, the alarm temperature of the former may be higher than the alarm temperature of the latter.
Preferably, the combustion controller 10 further comprises an alarm unit (not shown), wherein if one or more sensors of each type are arranged on the natural gas burner to which said combustion controller 10 corresponds, the alarm unit is configured to trigger an alarm message if at least any one of the arranged sensors of each type fails.
Taking fig. 10 as an example, fig. 10 shows a schematic diagram of a natural gas burner comprising two sensors according to an embodiment of the invention. Two temperature sensors 701,702 are arranged on the natural gas burner 40, which together detect the temperature of the natural gas burner. If one of the temperature sensors, for example, the temperature sensor 701 fails, the combustion controller 10 no longer obtains a temperature signal from the temperature sensor 701, so that it is determined that the temperature sensor 701 fails, and an alarm message is sent by the alarm unit.
FIG. 5 is a block diagram of a combustion controller according to another embodiment of the invention. The combustion controller 10 includes an acquisition unit 101, a determination unit 102, an adjustment unit 103, a feedback unit 104, a wind control unit 105, and a trigger unit 106.
The obtaining unit 101, the determining unit 102, the adjusting unit 103, and the feedback unit 104 are the same as or similar to corresponding devices shown in fig. 3 or fig. 4, and therefore are not described herein again and are included herein by way of reference.
The wind control unit 105 can obtain the measurement result from the obtaining unit 101, and determine a current corresponding risk level, for example, a high risk level, a medium risk level, and a low risk level, according to the measurement result.
The triggering unit 106 triggers an operation corresponding to the risk level based on the risk level.
Taking the measurement of hydrogen content as an example:
if the hydrogen content exceeds the normal limit and reaches a low risk level, sending alarm information;
triggering the natural gas burner to be closed if the hydrogen content exceeds the normal limit and reaches a medium risk level;
if the hydrogen content exceeds normal limits and reaches a high risk level, the natural gas burner is triggered to trip.
Preferably, the combustion controller 10 may also determine the current corresponding risk level and trigger the corresponding operation in combination with other signals. For example, if the hydrogen content exceeds normal limits and reaches a high risk level while the booming of the natural gas burner exceeds a certain level for a certain duration, the natural gas burner is triggered to trip. The growl may be obtained by placing a growl sensor on the natural gas burner.
Preferably, when the wind control unit 105 further obtains the feedback signal (not shown in the figure), the wind control unit 105 may determine the current corresponding risk level according to the gas component and the corresponding content in the measurement result, in combination with the feedback signal. For example, if the hydrogen content exceeds the normal limit, and the emission signal of the emission sensor shows that the emission content exceeds the standard, the current corresponding risk level can be determined as the medium risk level; if the hydrogen content exceeds the normal limit, and meanwhile, the emission signal of the emission sensor shows that the emission content exceeds the standard and the temperature signal of the temperature sensor shows high temperature, the current corresponding risk grade can be determined to be the high risk grade; or if the value of the hydrogen content exceeding the normal limit is high and the temperature signal of the temperature sensor shows high temperature, determining that the current corresponding risk level is a high risk level.
It will be understood by those skilled in the art that the foregoing description is by way of example only, and not limiting of the invention, and that other combinations of determining the risk level are equally applicable to the present invention and are within the scope of the invention.
The units in fig. 3-5 can be implemented by software, hardware (e.g., integrated circuit, FPGA (Field-Programmable Gate Array), etc.), or a combination of software and hardware.
Referring now to FIG. 11, a block diagram of a combustion controller is shown, in accordance with one embodiment of the present invention. As shown in fig. 11, the combustion controller 10 may include a memory 1101 and a processor 1102. The memory 1101 may store executable instructions. The processor 1102 may implement the operations performed by the various units of fig. 3-5 according to executable instructions stored by the memory 1101.
Additionally, embodiments of the present invention also provide a machine-readable medium having stored thereon executable instructions that, when executed, cause a machine to perform operations implemented by processor 1102.
FIG. 6 is a system flow diagram of a combustion controller control method employing a natural gas combustion control system, according to an embodiment of the invention.
The natural gas combustion control system includes a combustion controller 10 and a gas analyzer 20.
Referring to fig. 1, fig. 1 shows a system architecture diagram of a natural gas combustion control system. The combustion controller 10 is connected to the gas analyzer 20 and the control valve 50 in the intake duct 30 by means of a wired connection or a wireless connection to acquire signals transmitted from the gas analyzer 20 and to transmit or acquire information to the control valve 50 in the intake duct 30.
The gas analyzer 20 is connected to the intake conduit 30 of the natural gas burner 40, and this connection enables the gas analyzer 20 to sample the intake conduit 30, i.e. to obtain a sample of the natural gas burned by the natural gas burner 40.
In step S1, the gas analyzer 20 analyzes the sampled natural gas to obtain measurement results of various types and corresponding contents of gas components contained in the natural gas. Here, the analysis method includes two ways: first, the content of the gas contained in the natural gas is analyzed based on a predetermined gas composition, for example, preferably, the content of hydrogen in the natural gas is predetermined and analyzed, and the gas analyzer 20 analyzes and measures the content of hydrogen in the natural gas, such as the content of hydrogen is 15%; second, the gas analyzer 20 first analyzes component categories of various gases contained in the natural gas, such as methane, ethane, carbon dioxide, nitrogen, hydrogen sulfide, and the like, and then determines gas contents corresponding to the respective gas components based on the analyzed gas components, respectively.
Then, in step S2, the gas analyzer 20 sends the measurement result to the combustion controller 10.
In step S3, after acquiring the measurement result, the combustion controller 10 inputs the measurement result as input data into a preset control model, and determines control information corresponding to the measurement result directly or indirectly according to the output result of the control model for the input data. Wherein the control model is associated with a corresponding content of gas components in the natural gas. For example, the control model may directly include different control information corresponding to different natural gas components and contents; or, the control model includes different intake air flow rates corresponding to different natural gas components and contents, and the combustion controller 10 determines corresponding control information, such as increasing the flow rate or decreasing the flow rate, according to the intake air flow rate.
Those skilled in the art will understand that, the control model may be presented in the form of a two-dimensional or multi-dimensional curve, such as the abscissa axis representing the hydrogen content value and the ordinate axis representing the natural gas flow value; but also tables or other presentation means.
Wherein, the determination of the control model can comprise two modes: first, based on manual settings; second, real-time adjustments are made based on the feedback signal based on default settings. Here, the feedback signal may be various kinds of sensor signals described below.
In step S4, the combustion controller 10 adjusts the natural gas flow rate in the intake duct 30 of the natural gas burner 40 by adjusting the control valve 50 based on the control information. It will be understood by those skilled in the art that other adjustment means than the adjustment of the control valve 50 can be adapted to the present invention, and are also included within the scope of the present invention and are incorporated herein by reference.
Preferably, the method further comprises the step of determining a risk level (not shown): specifically, the combustion controller 10 determines a current corresponding risk level, for example, a high risk level, a medium risk level, and a low risk level, based on the measurement result. Taking the measurement of hydrogen content as an example:
if the hydrogen content exceeds the normal limit and reaches a low risk level, sending alarm information;
triggering the natural gas burner 40 to shut down if the hydrogen content exceeds normal limits and reaches a medium risk level;
if the hydrogen content exceeds normal limits and reaches a high risk level, the natural gas burner 40 is triggered to trip.
Preferably, the method further comprises the steps of determining a risk level in combination with other signals and triggering a responsive operation (not shown): in particular, the combustion controller 10 may also determine the current corresponding risk level and trigger the corresponding operation in combination with other signals. For example, if the hydrogen content exceeds normal limits and reaches a high risk level while the growl of the natural gas burner 40 exceeds a certain level for a certain duration, the natural gas burner 40 is triggered to trip. The growl may be obtained by placing a growl sensor on the natural gas combustor 40.
Preferably, taking fig. 2 as an example, the natural gas combustion control system comprises a combustion controller 10, a gas analyzer 20, a temperature sensor 701, a temperature sensor 702, a dynamic sensor 80, and an emission sensor 90.
Temperature sensors 701 and 702 are located on the natural gas burner 40 to measure the burner temperature, which may be any device capable of measuring the natural gas burner temperature, such as a thermocouple (thermocouple).
The emissions sensor 90 is disposed downstream of the natural gas burner 40, where those skilled in the art will appreciate the location of the emissions sensor. An emissions sensor 90(emission sensor) is capable of measuring the combustion emissions of the natural gas burner 40.
A dynamic sensor 80(dynamic sensor) is arranged in the combustion chamber of the natural gas burner, capable of measuring combustion dynamics in the combustion chamber. For simplicity, the specific combustion chamber is not shown, the position of the dynamic sensor 80 is only shown schematically, and those skilled in the art can understand the arrangement position of the dynamic sensor 80.
The number of temperature sensors, emission sensors, dynamic sensors is only indicated here by way of example and does not mean that only individual sensors can be arranged at the respective positions. Those skilled in the art can arrange two or more sensors of the same type for each system or for each burner, based on the actual needs. Further, one or more of the three types of sensors described above may be disposed on the combustor.
Here, it will be appreciated by those skilled in the art that for ease of illustration and clarity, a two-stage natural gas burner 40 and associated equipment is shown in fig. 2; for example, control valve 601, control valve 602, annular parent pipe (piping) 1001, annular parent pipe 1002, distribution branch (distribution branch)301, distribution branch 302, etc. In the natural gas combustion system architecture, the natural gas combustion system can comprise one-stage or two-stage or more than two-stage multi-stage natural gas burners and corresponding devices matched with the natural gas burners, such as a combustion controller, a gas analyzer, various sensors and the like.
If the natural gas combustion control system includes a sensor, the system method may further include the step of obtaining a feedback signal (not shown): specifically, temperature sensors 701,702 transmit respective temperature signals to combustion controller 10, dynamic sensor 80 transmits respective dynamic signals to combustion controller 10, and emission sensor 90 transmits respective emission signals to combustion controller 10; accordingly, the combustion controller 10 takes at least any one of the above signals as a feedback signal.
Then, in step S3, the combustion controller 10 inputs the measurement result and the feedback signal as input data into a preset control model, and determines control information corresponding to the measurement result and the feedback signal directly or indirectly according to the output result of the control model to the input data. Wherein the control model is related to the gas composition and corresponding content in the natural gas and the feedback signal.
For example, the control model may directly include different control information corresponding to different feedback signals under different natural gas components and contents; or, the control model includes different natural gas components and contents, and different intake air flow rates corresponding to different feedback signals, and the like, and then the combustion controller 10 determines corresponding control information, such as increasing the flow rate or decreasing the flow rate, according to the intake air flow rate.
Those skilled in the art will appreciate that the control model may be presented as a multidimensional curve, such as one axis of abscissa representing the hydrogen content, one or more axes of abscissa representing the value of a feedback signal, and one or more axes of ordinate representing the natural gas flow value; but also tables or other presentation means.
Wherein, the determination of the control model can comprise two modes: first, based on manual settings; second, real-time adjustments are made based on the feedback signal based on default settings.
Preferably, the control logic of the control model is also related to the arrangement position of the sensor. The control logic is a logic for determining a corresponding output (i.e. corresponding control information) based on a certain input (i.e. the type and corresponding value of the feedback signal). And when the arrangement positions of the sensors are different, the control information corresponding to the same feedback signals is different.
For example, if the temperature sensor 701 is located closer to the flame than the temperature sensor 702 is located at the natural gas burner 40, the control model for the temperature sensor 701 is different from the control model for the temperature sensor 702, for example, the alarm temperature of the former is higher than the alarm temperature of the latter.
In step S4, the combustion controller 10 adjusts the natural gas flow rate in the intake duct 30 of the natural gas burner 40 by adjusting at least one of the control valve 50, the control valve 601, and the control valve 602 based on the control information. It should be understood by those skilled in the art that other adjustment methods besides adjusting the control valve 50, the control valve 601, and the control valve 602 can be applied to the present invention, and are included in the scope of the present invention and are also included herein by reference.
Preferably, the method further comprises the step of triggering a warning message (not shown), in particular, each type of sensor arranged on one of said natural gas burners comprising one or more, said combustion controller 10 triggering a warning message if at least any one of each type of sensors arranged fails.
Taking fig. 10 as an example, fig. 10 shows a schematic diagram of a natural gas burner comprising two sensors according to an embodiment of the invention. Two temperature sensors 701,702 are arranged on the natural gas burner 40, which together detect the temperature of the natural gas burner. If one of the temperature sensors, for example, the temperature sensor 701 fails, the combustion controller 10 no longer acquires a temperature signal from the temperature sensor 701, and therefore determines that the temperature sensor 701 fails and issues an alarm message.
Preferably, the method further comprises a step (not shown) of determining a risk level in combination with a feedback signal, in particular, when said combustion controller 10 further acquires said feedback signal, said combustion controller 10 may determine a current corresponding risk level in combination with said feedback signal according to the gas component and the corresponding content in said measurement result. For example, if the hydrogen content exceeds the normal limit while the emission signal of the emission sensor 90 indicates that the emission content exceeds the standard, it may be determined that the current corresponding risk level is an intermediate risk level; if the hydrogen content exceeds the normal limit, and meanwhile, the emission signal of the emission sensor 90 shows that the emission content exceeds the standard and the temperature signal of the temperature sensor 701 or 702 shows high temperature, the current corresponding risk level can be determined to be a high risk level; or if the value of the hydrogen content exceeding the normal limit is high while the temperature signal of the temperature sensor 701 or 702 shows a high temperature, it may be determined that the currently corresponding risk level is a high risk level.
It will be understood by those skilled in the art that the foregoing description is by way of example only, and not limiting of the invention, and that other combinations of determining the risk level are equally applicable to the present invention and are within the scope of the invention.
FIG. 7 is a flow chart of a combustion controller control method according to an embodiment of the invention.
In step S101, the combustion controller 10 obtains a measurement result of the natural gas in the intake duct of the natural gas burner, wherein the measurement result includes a gas component and a corresponding content in the natural gas.
Wherein the combustion controller 10 may interact with a device such as a gas analyzer to obtain the measurement results sent by the gas analyzer, and the combustion controller 10 may further interact with other devices capable of providing the measurement results to obtain the measurement results.
In step S101, the combustion controller 10 takes the measurement result and then executes step S102. In step S102, the combustion controller 10 inputs the measurement result as input data into a preset control model, and determines control information corresponding to the measurement result directly or indirectly according to an output result of the control model for the input data. Wherein the control model is associated with a corresponding content of gas components in the natural gas. For example, the control model may directly include different control information corresponding to different natural gas components and contents; or, the control model includes different intake air flow rates corresponding to different natural gas components and contents, and the combustion controller 10 determines corresponding control information, such as increasing the flow rate or decreasing the flow rate, according to the intake air flow rate.
Those skilled in the art will understand that, the control model may be presented in the form of a two-dimensional or multi-dimensional curve, such as the abscissa axis representing the hydrogen content value and the ordinate axis representing the natural gas flow value; but also tables or other presentation means.
Wherein, the determination of the control model can comprise two modes: first, based on manual settings; second, real-time adjustments are made based on the feedback signal based on default settings.
Then, step S103 is executed, and in step S103, the combustion controller 10 adjusts the natural gas flow rate in the intake duct of the natural gas burner by adjusting, for example, a control valve located on the intake duct of the natural gas burner, based on the control information. It will be understood by those skilled in the art that other adjustment means than adjusting the control valve can be adapted to the present invention, and are also included within the scope of the present invention and are incorporated herein by reference.
FIG. 8 is a flow chart of a combustion controller control method according to another embodiment of the present invention.
Step S101 and step S103 are the same as or similar to the corresponding steps shown in fig. 7, and therefore are not described herein again and are included herein by way of reference.
In step S104, the combustion controller 10 interacts with the sensor corresponding to the natural gas burner or other devices capable of providing corresponding signals to obtain at least any one of a dynamic signal of the dynamic sensor of the natural gas burner, an exhaust signal of the exhaust sensor, and a temperature signal of the temperature sensor as a feedback signal.
Then, step S102 obtains the measurement result sent in step S101 and obtains the feedback signal sent in step S104, inputs the measurement result and the feedback signal as input data into a preset control model, and directly or indirectly determines the measurement result and the control information corresponding to the feedback signal according to the output result of the control model on the input data. Wherein the control model is related to the gas composition and corresponding content in the natural gas and the feedback signal.
For example, the control model may directly include different control information corresponding to different feedback signals under different natural gas components and contents; alternatively, the control model includes different natural gas components and contents, and different intake air flow rates corresponding to different feedback signals, and then, in step S102, the combustion controller 10 determines corresponding control information, such as increasing or decreasing the flow rate, according to the intake air flow rate.
Those skilled in the art will appreciate that the control model may be presented as a multidimensional curve, such as one axis of abscissa representing the hydrogen content, one or more axes of abscissa representing the value of a feedback signal, and one or more axes of ordinate representing the natural gas flow value; but also tables or other presentation means.
Wherein, the determination of the control model can comprise two modes: first, based on manual settings; second, real-time adjustments are made based on the feedback signal based on default settings.
Preferably, the control logic of the control model is also related to the arrangement position of the sensor. The control logic is a logic for determining a corresponding output (i.e. corresponding control information) based on a certain input (i.e. the type and corresponding value of the feedback signal). And when the arrangement positions of the sensors are different, the control information corresponding to the same feedback signals is different.
For example, if a certain temperature sensor is located closer to the flame than another temperature sensor is located at the natural gas burner, the control model for the former is different from the control model for the latter, for example, the alarm temperature of the former may be higher than the alarm temperature of the latter.
Preferably, the method further comprises a step (not shown) of triggering an alarm message, in particular, in which if each type of sensor arranged on the natural gas burner to which said combustion controller 10 corresponds comprises one or more, said combustion controller 10 triggers an alarm message if at least any one of said arranged types of sensors fails.
Taking fig. 10 as an example, fig. 10 shows a schematic diagram of a natural gas burner comprising two sensors according to an embodiment of the invention. Two temperature sensors 701,702 are arranged on the natural gas burner 40, which together detect the temperature of the natural gas burner. If one of the temperature sensors, for example, the temperature sensor 701 fails, the combustion controller 10 no longer obtains a temperature signal from the temperature sensor 701, so that it is determined that the temperature sensor 701 fails, and an alarm message is sent by the alarm unit.
FIG. 9 is a flow chart of a combustion controller control method according to another embodiment of the invention.
Step S101, step S102, step S103, and step S104 are the same as or similar to the corresponding steps shown in fig. 7 or fig. 8, and therefore are not repeated herein and are included herein by way of reference.
In step S105, the combustion controller 10 can obtain the measurement result from step S101, and determine the current corresponding risk level, for example, a high risk level, a medium risk level, and a low risk level, according to the measurement result.
In step S106, the combustion controller 10 triggers an operation corresponding to the risk level based on the risk level.
Taking the measurement of hydrogen content as an example:
if the hydrogen content exceeds the normal limit and reaches a low risk level, sending alarm information;
triggering the natural gas burner to be closed if the hydrogen content exceeds the normal limit and reaches a medium risk level;
if the hydrogen content exceeds normal limits and reaches a high risk level, the natural gas burner is triggered to trip.
Preferably, in step S105, the combustion controller 10 may also determine the current corresponding risk level and trigger the corresponding operation in combination with other signals. For example, if the hydrogen content exceeds normal limits and reaches a high risk level while the booming of the natural gas burner exceeds a certain level for a certain duration, the natural gas burner is triggered to trip. The growl may be obtained by placing a growl sensor on the natural gas burner.
Preferably, when step S105 is capable of obtaining the feedback signal from step S104 (not shown in the figure), in step S105, the combustion controller 10 may determine the current corresponding risk level according to the gas component and the corresponding content in the measurement result, in combination with the feedback signal. For example, if the hydrogen content exceeds the normal limit, and the emission signal of the emission sensor shows that the emission content exceeds the standard, the current corresponding risk level can be determined as the medium risk level; if the hydrogen content exceeds the normal limit, and meanwhile, the emission signal of the emission sensor shows that the emission content exceeds the standard and the temperature signal of the temperature sensor shows high temperature, the current corresponding risk grade can be determined to be the high risk grade; or if the value of the hydrogen content exceeding the normal limit is high and the temperature signal of the temperature sensor shows high temperature, determining that the current corresponding risk level is a high risk level.
It will be understood by those skilled in the art that the foregoing description is by way of example only, and not limiting of the invention, and that other combinations of determining the risk level are equally applicable to the present invention and are within the scope of the invention.
It will be understood by those skilled in the art that various changes and modifications may be made to the embodiments disclosed above without departing from the spirit of the invention. Accordingly, the scope of the invention should be determined from the following claims.

Claims (11)

1. A method of combustion monitoring of a natural gas burner (40), wherein the natural gas burner (40) is connected to an intake conduit (30), the intake conduit (30) being connected to a natural gas combustion control system comprising a gas analyzer (20) and a combustion controller (10), the method comprising:
the gas analyzer (20) samples from the gas inlet pipeline (30) and analyzes the sampled natural gas to obtain a measurement result, wherein the measurement result comprises gas components and corresponding contents in the natural gas;
the gas analyzer (20) sending the measurement results to the combustion controller (10);
the combustion controller (10) inputs the measurement results into a preset control model to determine control information corresponding to the measurement results, wherein the control model is related to the gas components in the natural gas and the corresponding content;
the combustion controller (10) adjusts the natural gas flow rate in the intake duct (30) of the natural gas burner (40) according to the control information,
wherein the natural gas combustion control system further comprises at least any one of a dynamic sensor (80), an emissions sensor (90), a temperature sensor (701,702), the dynamic sensor (80) being arranged in a combustion chamber of the natural gas combustor (40), the emissions sensor (90) being arranged downstream of the natural gas combustor (40), the temperature sensor (701,702) being arranged on the natural gas combustor (40), the method further comprising:
the combustion controller (10) acquires at least any one of a dynamic signal of the dynamic sensor (80), an emission signal of the emission sensor (90), and a temperature signal of the temperature sensor (701,702) as a feedback signal;
wherein the step of the combustion controller (10) determining control information comprises:
the combustion controller (10) inputs the measurement and the feedback signal into a preset control model to determine control information corresponding to the measurement and the feedback signal, wherein the control model is related to the gas component and the corresponding content in the natural gas and the feedback signal.
2. The method of claim 1, wherein the combustion controller (10) further obtains the feedback signal, the method further comprising:
the combustion controller (10) determines the current corresponding risk level according to the gas components and the corresponding contents in the measurement result and by combining the feedback signal;
triggering an operation corresponding to the risk level.
3. A method of combustion monitoring of a natural gas burner (40) at a combustion controller (10), wherein the method comprises:
obtaining a measurement of natural gas in an intake duct (30) of the natural gas burner (40), wherein the measurement comprises gas components and corresponding contents in the natural gas;
inputting the measurement result into a preset control model to determine control information corresponding to the measurement result, wherein the control model is related to the gas component in the natural gas and the corresponding content;
adjusting the natural gas flow in an intake duct (30) of the natural gas burner (40) in accordance with the control information,
wherein the method further comprises:
acquiring at least any one of a dynamic signal of a dynamic sensor (80) of the natural gas combustor (40), a discharge signal of a discharge sensor (90), and a temperature signal of a temperature sensor (701,702) as a feedback signal;
wherein the step of determining control information comprises:
inputting the measurement result and the feedback signal into a preset control model to obtain control information corresponding to the measurement result and the feedback signal, wherein the control model is related to the gas component in the natural gas and the corresponding content and the feedback signal.
4. The method of claim 3, wherein the method further comprises:
determining the current corresponding risk grade according to the gas components and the corresponding contents in the measurement result;
triggering an operation corresponding to the risk level.
5. A natural gas combustion control system, wherein the natural gas combustion control system comprises a gas analyzer (20) and a combustion controller (10):
the gas analyzer (20) is connected with an air inlet pipeline (30) of a natural gas burner (40), and the gas analyzer (20) is used for sampling from the air inlet pipeline (30); analyzing the sampled natural gas to obtain a measurement result, wherein the measurement result comprises gas components and corresponding contents in the natural gas; and sending the measurement result to the combustion controller (10);
the combustion controller (10) includes:
an acquisition unit (101) for acquiring the measurement results sent by the gas analyzer (20);
a determination unit (102) for inputting the measurement results into a preset control model to determine control information corresponding to the measurement results, wherein the control model is related to the gas components in the natural gas and the corresponding content;
an adjustment unit (103) for adjusting a natural gas flow rate in an intake duct (30) of the natural gas burner (40) according to the control information, wherein the natural gas combustion control system further includes at least any one of a dynamic sensor (80), an emission sensor (90), and a temperature sensor (701,702), the dynamic sensor (80) being arranged in a combustion chamber of the natural gas burner (40), the emission sensor (90) being arranged downstream of the natural gas burner (40), the temperature sensor (701,702) being arranged on the natural gas burner (40), the combustion controller (10) further includes:
a feedback unit (104) for acquiring at least any one of a dynamic signal of the dynamic sensor (80), a discharge signal of the discharge sensor (90), and a temperature signal of the temperature sensor (701,702) as a feedback signal;
wherein the determination unit (102) is configured to:
inputting the measurement result and the feedback signal into a preset control model to determine control information corresponding to the measurement result and the feedback signal, wherein the control model is related to the gas component and the corresponding content in the natural gas and the feedback signal.
6. The natural gas combustion control system according to claim 5, wherein the control logic of the preset control model is further associated with an arrangement position of the sensor (80,90,701, 702).
7. The natural gas fired control system as claimed in claim 6, wherein each type of sensor arranged on one of the natural gas burners (40) comprises one or more, wherein the combustion controller (10) further comprises:
and the alarm unit is used for triggering alarm information if at least any one of the arranged sensors in each type fails.
8. The natural gas combustion control system as claimed in claim 5, wherein the combustion controller (10) further comprises:
the wind control unit (105) is used for determining the current corresponding risk level according to the gas components and the corresponding content in the measurement result;
a triggering unit (106) for triggering an operation corresponding to the risk level.
9. The natural gas combustion control system of claim 8, wherein when the combustion controller (10) further comprises the feedback unit (104), the wind control unit (105) is configured to:
and determining the current corresponding risk level according to the gas components and the corresponding contents in the measurement results and by combining the feedback signals.
10. A combustion controller (10) for combustion monitoring of a natural gas burner (40), wherein the combustion controller (10) comprises:
an acquisition unit (101) for acquiring a measurement result of natural gas in an intake duct (30) of the natural gas burner (40), wherein the measurement result comprises gas components and corresponding contents in the natural gas;
a determination unit (102) for inputting the measurement results into a preset control model to determine control information corresponding to the measurement results, wherein the control model is related to the gas components in the natural gas and the corresponding content;
an adjustment unit (103) for adjusting the natural gas flow in the intake duct (30) of the natural gas burner (40) in accordance with the control information,
wherein the combustion controller (10) further comprises:
a feedback unit (104) for acquiring at least any one of a dynamic signal of a dynamic sensor (80) of the natural gas burner (40), a discharge signal of a discharge sensor (90), and a temperature signal of a temperature sensor (701,702) as a feedback signal;
wherein the determination unit (102) is configured to:
inputting the measurement result and the feedback signal into a preset control model to obtain control information corresponding to the measurement result and the feedback signal, wherein the control model is related to the gas component in the natural gas and the corresponding content and the feedback signal.
11. The combustion controller (10) according to claim 9 or 10, wherein the combustion controller (10) further comprises:
the wind control unit (105) is used for determining the current corresponding risk level according to the gas components and the corresponding content in the measurement result;
a triggering unit (106) for triggering an operation corresponding to the risk level.
CN201610133736.5A 2016-03-09 2016-03-09 Combustion monitoring method, device and system of natural gas combustor Active CN107178789B (en)

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