Intelligent control system and method for combustor for suspension kiln

Abstract

The invention discloses an intelligent control system and method for a combustor for a suspension kiln. The system comprises a suspension kiln collection module, a PLC control system, a combustor control actuator, a combustion fan and a primary fan. Wherein the suspension kiln collecting module is used for collecting combustion parameter information of a suspension kiln and transmitting the combustion parameter information to the PLC control system, and the PLC control system conducts combustion optimization on the basis of an air-fuel ratio combustion optimization model according to gas real-time flow obtained in the combustion parameter information of the suspension kiln. The method comprises the following steps: generating a ratio of gas flow to air flow after analysis and calculation, generating an air-fuel ratio parameter control signal of an igniter, and adjusting a corresponding pneumatic valve of a combustor through a combustor control actuator. Intelligent analysis can be carried out in analysis and calculation of the combustion energy consumption ratio, and the effect of the suspension kiln combustor on sufficient combustion of materials is improved.

Description

Technical Field

[0001] The invention relates to the technical field of suspension kiln combustion, in particular to an intelligent control system and method for a burner used in a suspension kiln. Background Art

[0002] The burner of the suspension kiln is a device that continuously delivers fuel and air into the furnace, rationally organizes the coal powder airflow, and makes them well mixed, ignited and burned quickly and stably. It is also widely used in boilers, asphalt mixing plants, oil fields, incinerators, hot blast furnaces, foundry machinery, and industrial kilns.

[0003] The suspension kiln has a simple structure, convenient operation, and good stability. The materials in the suspension kiln are suspended in the kiln, and the heat and mass transfer rate is much greater than that of the materials in the fixed bed and the fluidized bed. The gas in the furnace is in a fierce turbulent state, the fuel burns evenly, the furnace temperature is uniform, and the materials are heated evenly. However, the existing suspension kiln is not intelligent enough in the control of reaction time, temperature and flow rate, which is mainly reflected in the control and adjustment of the energy consumption ratio of full combustion. The optimization of the key parameters of the suspension kiln burner is the key to further uniform combustion of the suspension kiln, full combustion of materials in the furnace, and energy saving and consumption reduction. At the same time, the traditional optimization setting of the parameters of the full combustion energy consumption ratio of the suspension kiln burner is basically based on manual calculation, analysis and setting, which is generally accurate and relatively lagging. Based on the above-mentioned shortcomings of the intelligence, accuracy, efficiency, and real-time performance of the analysis and calculation of the full combustion energy consumption ratio of the suspension kiln burner at this stage, we propose an intelligent control system and method for the suspension kiln burner. Summary of the invention

[0004] In view of the above problems existing in the existing suspension kiln burner, the present invention is proposed.

[0005] Therefore, one of the objects of the present invention is to provide an intelligent control system and method for a burner for a suspension kiln, which, by constructing an integrated intelligent control system for the burner and an intelligent analysis method for the combustion energy consumption ratio, can perform intelligent analysis in the analysis and calculation of the combustion energy consumption ratio, thereby improving the effect of the suspension kiln burner on the full combustion of materials, and has the effects of full combustion of materials and energy saving and consumption reduction.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] In one aspect, the present invention provides an intelligent control system for a burner of a suspension kiln, comprising:

[0008] The suspension kiln acquisition module is used to collect the combustion parameter information of the suspension kiln and transmit it to the PLC control system. The suspension kiln acquisition module includes a temperature transmitter, a pressure transmitter and a gas flow meter. The temperature transmitter, the pressure transmitter and the gas flow meter are sequentially arranged in the pipeline of the gas inlet. After the temperature transmitter, the pressure transmitter and the gas flow meter are converted into digital signals, the combustion parameter information is transmitted to the PLC control system;

[0009] A PLC control system is connected to the suspension kiln acquisition module, and is used to generate the ratio of the gas flow rate to the air flow rate and generate an air-fuel ratio parameter control signal of the igniter after analyzing and calculating the real-time gas flow rate obtained from the combustion parameter information of the suspension kiln and based on the air-fuel ratio combustion optimization model, so as to obtain the air flow rate value and gas flow rate for full combustion;

[0010] The burner control actuator is connected to the PLC control system and is used to respond to the ignition opening parameter signal sent by the PLC control system. During the ignition process of the burner, after receiving the ignition opening parameter signal through the burner control actuator, the ignition opening of the pneumatic valve is controlled according to the ignition opening parameter, and the corresponding pneumatic valve of the burner is adjusted to control the flame shape and temperature of the suspension kiln burner;

[0011] A combustion-supporting fan connected to the burner, for responding to and adjusting the combustion-supporting fan parameters according to the air-fuel ratio parameter control signal sent by the PLC control system;

[0012] A primary air fan is connected to the burner and is used to respond to the primary air fan target parameter of the PLC control system to perform a primary air blowing control operation.

[0013] As a preferred solution of the present invention, the pneumatic valve of the burner control actuator includes a high fire valve pneumatic valve and a low fire valve pneumatic valve.

[0014] As a preferred solution of the present invention, it also includes: an emergency shut-off valve, a pneumatic regulating valve, a relief valve, a purge valve and a main emergency valve;

[0015] The emergency shut-off valve is connected to the gas flowmeter, the pneumatic regulating valve is connected to the emergency shut-off valve, the main emergency valve is connected to the pneumatic regulating valve, the purge valve is connected to the air inlet end of the main emergency valve, the purge valve is connected to the air outlet end of the main emergency valve, the air inlet ends of the high fire valve and the low fire valve are both connected to the air outlet end of the main emergency valve, and the air outlet ends of the high fire valve and the low fire valve are connected to the air inlet end of the burner.

[0016] As a preferred solution of the present invention, the combustion parameter information includes igniter parameters, purge parameters, fire detection parameters, ignition opening parameters, combustion-supporting fan parameters, air-fuel ratio parameters, fire detection status parameters, primary fan parameters and combustion-supporting fan parameters.

[0017] As a preferred solution of the present invention, wherein: the igniter parameters include cooling time and ignition time parameters, the cooling time is the time data for the igniter to cool within a preset time threshold after ignition, and the ignition time parameter is the maximum time parameter for a single continuous ignition;

[0018] The purge parameter is a time parameter for the inert gas to purge the gas in the burner during the ignition or flameout process;

[0019] The fire detection parameter is a fire detection delay time parameter during which flame output still occurs within the fire detection delay time;

[0020] The ignition opening parameter is a setting parameter of the ignition opening of the pneumatic valve during the automatic ignition process;

[0021] The combustion-supporting fan parameter is a setting parameter for the combustion-supporting fan ignition speed ratio during the automatic ignition process;

[0022] The air-fuel ratio parameter includes gas flow and combustion-supporting air flow parameters, and is parameter information of the flow ratio of gas to combustion-supporting air. At the same time, the combustion-supporting air fan automatically adjusts the combustion-supporting air flow parameters according to the gas flow and air-fuel ratio parameters.

[0023] The fire detection state parameters are parameters when the burner is in a default fire state;

[0024] The primary fan parameters are changed by switching the source of the primary fan target parameters in the automatic mode, and the primary fan parameters include the primary fan hook state, and the primary fan hook state is that the primary fan target parameters are automatically converted and generated by the gas flow;

[0025] The combustion-supporting fan parameters are changed by switching the source of the next combustion-supporting fan target parameters in the automatic mode, and the combustion-supporting fan parameters include a combustion-supporting fan hook state, and the combustion-supporting fan hook state is that the combustion-supporting fan target parameters are automatically converted and generated by the combustion-supporting air flow rate.

[0026] As a preferred solution of the present invention, the air-fuel ratio combustion optimization model is an air-fuel ratio optimization control based on online analysis of the suspension kiln, specifically using PID control algorithm and parameter adjustment calculation to achieve optimal control of the air-fuel ratio in the suspension kiln, as follows:

[0027]

[0028] In formula (1), u(t) is the control amount of air-fuel ratio, k pis the proportional gain, e(t) is the deviation between the controlled amount of the air-fuel ratio and the preset value, T I Integration time constant, T D is the differential time constant, dt is the differential symbol;

[0029]

[0030] In formula (2), T is the total number of time series, α(t) is the control amount of the simulated air-fuel ratio at the current time t, and w t is the calibration parameter adjustment weight coefficient of the simulated air-fuel ratio at the current time t;

[0031]

[0032] In formula (3), R t is the output value of the ignition opening of the PLC control system, Q t is the heat sampling value at the current time t, Q t-1 is the heat signal sampling value at the previous moment t-1, F t is the combustion air flow sampling value at the current time t, F t-1 It is the combustion-supporting air flow sampling value at the previous moment t-1.

[0033] As a preferred solution of the present invention, the combustion-supporting fan is provided with a frequency converter, and the fan frequency converter frequency is controlled by a PLC control system to adjust the fan speed, thereby completing the adjustment of the combustion-supporting air flow rate.

[0034] As a preferred solution of the present invention, the PLC control system also includes an early warning module, which is used to automatically shut down for protection when the fire detection function is turned on and the flame detector does not detect a flame signal when the burner intelligent control system is in automatic mode, and to issue an alarm message and generate alarm data. At the same time, when the flame signal is unstable and the fire detection function is disabled, manual monitoring of the flame status is notified and arranged.

[0035] On the one hand, the present invention provides a method for an intelligent control system of a burner for a suspension kiln, which is an air-fuel ratio optimization control method for an online analysis of a suspension kiln, and is specifically as follows:

[0036] The target data of the combustion parameter information of the suspension kiln is preset, and the size of the gas electric regulating valve is automatically controlled through the PLC control system to ensure that the actual gas flow rate matches the target flow rate;

[0037] After the gas inlet is connected and the gas volume is increased, the PLC control system obtains the real-time flow, pressure and temperature parameter information of the gas through the suspension kiln acquisition module, and combines the air-fuel ratio combustion optimization model to analyze and calculate the optimal combustion ratio of gas and air flow, and obtain the air flow value information for full combustion;

[0038] The PLC control system generates control signals for the combustion-supporting fan and the burner control actuator according to the air flow value information of sufficient combustion, and performs air flow control after matching the control signals. The air flow control is specifically obtained by presetting the target data of the combustion parameter information of the suspension kiln, that is, by analyzing and calculating the real-time gas flow and air-fuel ratio, and controlling the ignition opening parameter to control the ignition opening of the pneumatic valve through the PLC control system, and controlling the fan inverter frequency to adjust the fan speed to complete the regulation of the combustion-supporting air flow.

[0039] Compared with the prior art, the present invention has the following beneficial effects: the present invention, by constructing an integrated intelligent control system for burners and an intelligent analysis method for combustion energy consumption ratio, can perform intelligent analysis in the analysis and calculation of the combustion energy consumption ratio, thereby improving the effect of the suspension kiln burner on the full combustion of materials, and has the effects of full combustion of materials and energy saving and consumption reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0041] Figure 1 It is a schematic diagram of the modular structure of the system of the present invention;

[0042] Figure 2 A schematic diagram of the pipeline connection of the burner for the suspension kiln of the system of the present invention;

[0043] Figure 3 Another schematic diagram of the connection of the burner pipeline for the suspension kiln of the system of the present invention;

[0044] Figure 4 It is a schematic diagram of the graphical interface of the parameter page in the PLC control system of the present invention;

[0045] Figure 5 It is a schematic diagram of the graphical interface of the manual page in the PLC control system of the present invention;

[0046] Figure 6 It is a flow chart of the air-fuel ratio optimization control method of the suspension kiln online analysis of the present invention;

[0047] Numbers in the figure: 100, suspension kiln acquisition module; 101, PLC control system; 102, burner control actuator; 103, combustion-supporting fan; 104, primary fan; 200, temperature transmitter; 201, pressure transmitter; 202, gas flow meter; 203, pneumatic regulating valve; 204, main emergency valve; 205, high fire valve; 206, low fire valve. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0049] Reference Figure 1-Figure 6 , is an embodiment of the present invention, which provides an intelligent control system for a burner for a suspension kiln and a method thereof, and the intelligent control system for a burner for a suspension kiln includes:

[0050] The suspension kiln acquisition module 100 is used to collect the combustion parameter information of the suspension kiln and transmit it to the PLC control system 101. The suspension kiln acquisition module 100 includes a temperature transmitter 200, a pressure transmitter 201 and a gas flow meter 202. The temperature transmitter 200, the pressure transmitter 201 and the gas flow meter 202 are sequentially arranged in the pipeline of the gas inlet, and the temperature transmitter 200, the pressure transmitter 201 and the gas flow meter 202 convert the combustion parameter information into digital signals and transmit them to the PLC control system 101.

[0051] The PLC control system 101 is connected to the suspension kiln acquisition module 100, and is used to generate the ratio of the gas flow rate to the air flow rate after analysis and calculation based on the combustion parameter information of the suspension kiln and the air-fuel ratio combustion optimization model, and generate the air-fuel ratio parameter control signal of the igniter, so as to obtain the air flow rate value and gas flow rate for full combustion;

[0052] The burner control actuator 102 is connected to the PLC control system 101 and is used to respond to the ignition opening parameter signal sent by the PLC control system 101. During the ignition process of the burner, after receiving the ignition opening parameter signal through the burner control actuator 102, the ignition opening of the pneumatic valve is controlled according to the ignition opening parameter, and the corresponding pneumatic valve of the burner is adjusted to control the flame shape and temperature of the suspension kiln burner;

[0053] The combustion-supporting fan 103 is connected to the burner and is used to respond to and adjust the parameters of the combustion-supporting fan 103 according to the air-fuel ratio parameter control signal sent by the PLC control system 101;

[0054] The primary air fan 104 is connected to the burner and is used to respond to the primary air fan 104 target parameters of the PLC control system 101 to perform a primary air blowing control operation.

[0055] Specifically, in this embodiment, the pneumatic valve of the burner control actuator 102 includes a high fire valve 205 pneumatic valve and a low fire valve 206 pneumatic valve.

[0056] Specifically, this embodiment also includes: an emergency shut-off valve, a pneumatic regulating valve 203, a relief valve, a purge valve and a main emergency valve 204; wherein the emergency shut-off valve is connected to the gas flow meter 202, the pneumatic regulating valve 203 is connected to the emergency shut-off valve, the main emergency valve 204 is connected to the pneumatic regulating valve 203, the purge valve is connected to the air inlet end of the main emergency valve 204, the purge valve is connected to the air outlet end of the main emergency valve 204, the air inlet ends of the high fire valve 205 and the low fire valve 206 are both connected to the air outlet end of the main emergency valve 204, and the air outlet ends of the high fire valve 205 and the low fire valve 206 are connected to the air inlet end of the burner.

[0057] Specifically, in this embodiment, the combustion parameter information includes igniter parameters, purge parameters, fire detection parameters, ignition opening parameters, combustion-supporting fan 103 parameters, air-fuel ratio parameters, fire detection status parameters, primary fan 104 parameters and combustion-supporting fan 103 parameters.

[0058] Among them, the igniter parameters include cooling time and ignition time parameters. The cooling time is the time data for the igniter to cool down within a preset time threshold after ignition. The ignition time parameter is the maximum time parameter for a single continuous ignition.

[0059] The purge parameter is the time parameter for the inert gas to purge the gas in the burner during the ignition or flameout process;

[0060] The fire detection parameter is the fire detection delay time parameter during which there is still flame output within the fire detection delay time;

[0061] The ignition opening parameter is the ignition opening setting parameter of the pneumatic valve during the automatic ignition process;

[0062] The combustion-supporting fan 103 parameter is a setting parameter for the ignition speed ratio of the combustion-supporting fan 103 during the automatic ignition process;

[0063] The air-fuel ratio parameter includes the gas flow rate and the combustion-supporting air flow rate parameters, and is the parameter information of the flow rate ratio of the gas to the combustion-supporting air. Meanwhile, the combustion-supporting air fan 103 automatically adjusts the combustion-supporting air flow rate parameters according to the gas flow rate and the air-fuel ratio parameters;

[0064] The fire detection state parameters are the parameters when the burner is in the default fire state;

[0065] The primary fan 104 parameters change the source of the primary fan 104 target parameters in the automatic mode by switching, and the primary fan 104 parameters include the primary fan 104 hook state, and the primary fan 104 hook state is that the primary fan 104 target parameters are automatically converted and generated by the gas flow;

[0066] The combustion-supporting fan 103 parameters are changed by switching the source of the next target parameters of the combustion-supporting fan 103 in the automatic mode, and the combustion-supporting fan 103 parameters include the hook state of the combustion-supporting fan 103, and the hook state of the combustion-supporting fan 103 is that the target parameters of the combustion-supporting fan 103 are automatically converted and generated by the combustion-supporting air flow.

[0067] Specifically, the air-fuel ratio combustion optimization model is an air-fuel ratio optimization control based on online analysis of the suspension kiln, and specifically uses PID control algorithm and parameter adjustment calculation to achieve optimal control of the air-fuel ratio in the suspension kiln, as follows:

[0068]

[0069] In formula (1), u(t) is the control amount of air-fuel ratio, k p is the proportional gain, e(t) is the deviation between the controlled amount of the air-fuel ratio and the preset value, T I Integration time constant, T D is the differential time constant, dt is the differential symbol;

[0070]

[0071] In formula (2), T is the total number of time series, α(t) is the control amount of the simulated air-fuel ratio at the current time t, and w t is the calibration parameter adjustment weight coefficient of the simulated air-fuel ratio at the current time t;

[0072]

[0073] In formula (3), R t is the output value of the ignition opening of the PLC control system 101, Q t is the heat sampling value at the current time t, Q t-1 is the heat signal sampling value at the previous moment t-1, F t is the combustion air flow sampling value at the current time t, F t-1 It is the combustion-supporting air flow sampling value at the previous moment t-1.

[0074] In the preferred embodiment of the present invention, the combustion-supporting fan 103 is provided with a frequency converter, and the fan frequency converter frequency is controlled by the PLC control system 101 to adjust the fan speed, thereby completing the adjustment of the combustion-supporting air flow rate.

[0075] In addition, the PLC control system 101 of this embodiment also includes an early warning module, which is used when the burner intelligent control system is in automatic mode. When the fire detection function is turned on and the flame detector does not detect a flame signal, it will automatically shut down for protection, issue an alarm message and generate alarm data. At the same time, when the flame signal is unstable and the fire detection function is disabled, it will notify and arrange for manual monitoring of the flame status.

[0076] At the same time, this embodiment also provides an air-fuel ratio optimization control method for online analysis of a suspension kiln, which is as follows:

[0077] The target data of the combustion parameter information of the suspension kiln is preset, and the size of the gas electric regulating valve is automatically controlled by the PLC control system 101 to ensure that the actual gas flow rate matches the target flow rate;

[0078] After the gas inlet is connected and the gas volume is increased, the PLC control system 101 obtains the real-time flow, pressure and temperature parameter information of the gas through the suspension kiln acquisition module 100, and analyzes and calculates the optimal combustion ratio of the gas and air flow in combination with the air-fuel ratio combustion optimization model to obtain the air flow value information for full combustion;

[0079] The PLC control system 101 generates control signals for the combustion-supporting fan 103 and the burner control actuator 102 according to the air flow value information of sufficient combustion, and performs air flow control after matching the control signals, wherein the air flow control is specifically obtained by presetting the target data of the combustion parameter information of the suspension kiln, that is, by analyzing and calculating the real-time gas flow and air-fuel ratio, and controls the ignition opening parameter to control the ignition opening of the pneumatic valve through the PLC control system 101, and controls the fan inverter frequency to adjust the fan speed to complete the regulation of the combustion-supporting air flow.

[0080] It should be emphasized in this embodiment that there are two PID controls in the PLC control system 101, namely, gas flow control: setting the target flow, the PLC automatically controls the size of the gas electric regulating valve to ensure that the actual gas flow matches the target flow; air flow control: setting the air target flow, calculated through the real-time gas flow and ratio, the PLC controls the fan inverter frequency to adjust the fan speed to adjust the air flow.

[0081] The main process is to increase the gas volume, and then PLC obtains the real-time gas flow. Combining the optimal combustion ratio of gas and air flow, the air flow value for full combustion can be obtained, and PLC automatically adjusts the fan speed to achieve the target air flow.

[0082] The gas and air flow rates are theoretical values, which are the ratios of gas and oxygen for full combustion. The change in fan speed affects the size of the air flow rate. Referring to the size of the electric fan, the air flow rate can be regarded as the oxygen content. The larger the amount of gas we give, the faster the fan should turn. For example, the ratio of gas and oxygen for full combustion is 1:8. Now, by adjusting the size of the gas electric regulating valve, the flame can be controlled in the required state.

[0083] To further illustrate, if the current gas flow rate is 8m3 / h, then the air flow rate should be 64m 3 / h(8*8). At this time, the fan inverter will automatically adjust the fan speed to make the air flow reach 64m 3 / h; at the same time, the flow meter will read the real-time flow of gas and air. If the ratio of gas and oxygen for complete combustion is 1:8. If the current real-time flow of gas is 8m 3 / h, then according to the ratio of 1:8, the real-time air flow rate should be 64m 3 / h(8m 3 / h*8).

[0084] In summary, the present invention has built a highly integrated intelligent control system by integrating advanced sensor technology, control algorithm and data processing technology. The system can monitor key parameters in the combustion process in real time, such as temperature, pressure, air-fuel ratio, etc., and use PID control algorithm to perform intelligent analysis and adjustment based on these data to achieve the best combustion effect; at the same time, through parameter adjustment calculation, it can identify and predict abnormal conditions in the combustion process, so as to make real-time adjustments to avoid energy waste and improve combustion efficiency; that is, by accurately controlling the air-fuel ratio and optimizing the combustion parameters, the combustion effect of the suspension kiln burner on the material is significantly improved. At the same time, it not only ensures the full combustion of the material, but also reduces the pollutant emissions caused by incomplete combustion.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0086] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0087] Any process or method description in the flow chart or otherwise described herein can be understood to represent a module, fragment or portion of a code including one or more executable instructions for implementing the steps of a specific logical function or process. And the scope of the preferred embodiment of the present application includes other implementations, in which the functions may not be performed in the order shown or discussed, including in a substantially simultaneous manner or in a reverse order according to the functions involved.

[0088] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, which can be embodied in any computer-readable medium for use by an instruction execution system, apparatus or device (such as a computer-based system, a system including a processor or other system that can fetch instructions from an instruction execution system, apparatus or device and execute instructions), or used in combination with these instruction execution systems, apparatuses or devices.

[0089] It should be understood that the various parts of the present application can be implemented with hardware, software, firmware or a combination thereof. In the above embodiments, multiple steps or methods can be implemented with software or firmware stored in a memory and executed by a suitable instruction execution system. All or part of the steps of the above embodiment method can be completed by instructing the relevant hardware through a program, which can be stored in a computer-readable storage medium, and when the program is executed, it includes one of the steps of the method embodiment or a combination thereof.

[0090] In addition, each functional unit in each embodiment of the present application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into one module. The above-mentioned integrated module can be implemented in the form of hardware or in the form of a software functional module. If the above-mentioned integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. The storage medium can be a read-only memory, a disk or an optical disk, etc.

[0091] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An intelligent control system for a burner of a suspension kiln, characterized in that: include: The suspension kiln acquisition module is used to collect the combustion parameter information of the suspension kiln and transmit it to the PLC control system. The suspension kiln acquisition module includes a temperature transmitter, a pressure transmitter and a gas flow meter. The temperature transmitter, the pressure transmitter and the gas flow meter are sequentially arranged in the pipeline of the gas inlet. After the temperature transmitter, the pressure transmitter and the gas flow meter are converted into digital signals, the combustion parameter information is transmitted to the PLC control system; A PLC control system is connected to the suspension kiln acquisition module, and is used to generate the ratio of the gas flow rate to the air flow rate and generate an air-fuel ratio parameter control signal of the igniter after analyzing and calculating the real-time gas flow rate obtained from the combustion parameter information of the suspension kiln and based on the air-fuel ratio combustion optimization model, so as to obtain the air flow rate value and gas flow rate for full combustion; The burner control actuator is connected to the PLC control system and is used to respond to the ignition opening parameter signal sent by the PLC control system. During the ignition process of the burner, after receiving the ignition opening parameter signal through the burner control actuator, the ignition opening of the pneumatic valve is controlled according to the ignition opening parameter, and the corresponding pneumatic valve of the burner is adjusted to control the flame shape and temperature of the suspension kiln burner; A combustion-supporting fan connected to the burner, for responding to and adjusting the combustion-supporting fan parameters according to the air-fuel ratio parameter control signal sent by the PLC control system; A primary air fan is connected to the burner and is used to respond to the primary air fan target parameter of the PLC control system to perform a primary air blowing control operation.

2. The intelligent control system for a burner of a suspension kiln according to claim 1, characterized in that: The pneumatic valve of the burner control actuator includes a high-fire valve pneumatic valve and a low-fire valve pneumatic valve.

3. The intelligent control system for a burner of a suspension kiln according to claim 2, characterized in that: Also includes: Emergency shut-off valve, pneumatic regulating valve, relief valve, purge valve and main emergency valve; The emergency shut-off valve is connected to the gas flowmeter, the pneumatic regulating valve is connected to the emergency shut-off valve, the main emergency valve is connected to the pneumatic regulating valve, the purge valve is connected to the air inlet end of the main emergency valve, the purge valve is connected to the air outlet end of the main emergency valve, the air inlet ends of the high fire valve and the low fire valve are both connected to the air outlet end of the main emergency valve, and the air outlet ends of the high fire valve and the low fire valve are connected to the air inlet end of the burner.

4. The intelligent control system for a burner of a suspension kiln according to claim 1, characterized in that: The combustion parameter information includes igniter parameters, purge parameters, fire detection parameters, ignition opening parameters, combustion-supporting fan parameters, air-fuel ratio parameters, fire detection state parameters, primary fan parameters and combustion-supporting fan parameters.

5. The intelligent control system for a burner of a suspension kiln according to claim 1, characterized in that: The igniter parameters include cooling time and ignition time parameters, wherein the cooling time is the time data for the igniter to cool down within a preset time threshold after ignition, and the ignition time parameter is the maximum time parameter for a single continuous ignition; The purge parameter is a time parameter for the inert gas to purge the gas in the burner during the ignition or flameout process; The fire detection parameter is a fire detection delay time parameter during which flame output still occurs within the fire detection delay time; The ignition opening parameter is a setting parameter of the ignition opening of the pneumatic valve during the automatic ignition process; The combustion-supporting fan parameter is a setting parameter for the combustion-supporting fan ignition speed ratio during the automatic ignition process; The air-fuel ratio parameter includes gas flow and combustion-supporting air flow parameters, and is parameter information of the flow ratio of gas to combustion-supporting air. At the same time, the combustion-supporting air fan automatically adjusts the combustion-supporting air flow parameters according to the gas flow and air-fuel ratio parameters. The fire detection state parameters are parameters when the burner is in a default fire state; The primary fan parameters are changed by switching the source of the primary fan target parameters in the automatic mode, and the primary fan parameters include the primary fan hook state, and the primary fan hook state is that the primary fan target parameters are automatically converted and generated by the gas flow; The combustion-supporting fan parameters are changed by switching the source of the next combustion-supporting fan target parameters in the automatic mode, and the combustion-supporting fan parameters include a combustion-supporting fan hook state, and the combustion-supporting fan hook state is that the combustion-supporting fan target parameters are automatically converted and generated by the combustion-supporting air flow rate.

6. The intelligent control system for a burner of a suspension kiln according to claim 1, characterized in that: The air-fuel ratio combustion optimization model is an air-fuel ratio optimization control based on online analysis of the suspension kiln. Specifically, the PID control algorithm and parameter adjustment calculation are used to achieve the optimal control of the air-fuel ratio in the suspension kiln. The details are as follows: In formula (1), u(t) is the control amount of air-fuel ratio, k p is the proportional gain, e(t) is the deviation between the controlled amount of the air-fuel ratio and the preset value, T I Integration time constant, T D is the differential time constant, dt is the differential symbol; In formula (2), T is the total number of time series, α(t) is the control amount of the simulated air-fuel ratio at the current time t, and w t is the calibration parameter adjustment weight coefficient of the simulated air-fuel ratio at the current time t; In formula (3), R t is the output value of the ignition opening of the PLC control system, Q t is the heat sampling value at the current time t, Q t-1 is the heat signal sampling value at the previous moment t-1, F t is the combustion air flow sampling value at the current time t, F t-1 It is the combustion-supporting air flow sampling value at the previous moment t-1.

7. The intelligent control system for a suspension kiln burner according to claim 1, characterized in that: The combustion-supporting fan is provided with a frequency converter, and the fan frequency converter frequency is controlled by a PLC control system to adjust the fan speed, thereby completing the adjustment of the combustion-supporting air flow rate.

8. The intelligent control system for a burner of a suspension kiln according to claim 1, characterized in that: The PLC control system also includes an early warning module, which is used to automatically shut down for protection, issue an alarm message and generate alarm data when the fire detection function is turned on and the flame detector does not detect a flame signal when the burner intelligent control system is in automatic mode. At the same time, when the flame signal is unstable and the fire detection function is disabled, manual monitoring of the flame status is notified and arranged.

9. A method for applying to the intelligent control system of a burner for a suspension kiln as claimed in claim 6, characterized in that: The method is an air-fuel ratio optimization control method for online analysis of suspension kiln, which is as follows: The target data of the combustion parameter information of the suspension kiln is preset, and the size of the gas electric regulating valve is automatically controlled through the PLC control system to ensure that the actual gas flow rate matches the target flow rate; After the gas inlet is connected and the gas volume is increased, the PLC control system obtains the real-time flow, pressure and temperature parameter information of the gas through the suspension kiln acquisition module, and combines the air-fuel ratio combustion optimization model to analyze and calculate the optimal combustion ratio of gas and air flow, and obtain the air flow value information for full combustion; The PLC control system generates control signals for the combustion-supporting fan and the burner control actuator according to the air flow value information of sufficient combustion, and performs air flow control after matching the control signals. The air flow control is specifically obtained by presetting the target data of the combustion parameter information of the suspension kiln, that is, by analyzing and calculating the real-time gas flow and air-fuel ratio, and controlling the ignition opening parameter to control the ignition opening of the pneumatic valve through the PLC control system, and controlling the fan inverter frequency to adjust the fan speed to complete the regulation of the combustion-supporting air flow.

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