Gas automatic gas distribution method, system, equipment and storage medium for heating furnace

Abstract

The application discloses a gas automatic gas distribution method, system, equipment and storage medium for a heating furnace, and comprises the following steps: calculating a fuel flow demand value according to the real-time working condition of the heating furnace and the fuel methane concentration; collecting the current supply concentration of low-concentration gas in real time; calculating the supply flow set value of the low-concentration gas according to a formula; determining the gas inlet valve opening value of the gas supply pipeline connected with the mixer according to the supply flow set value; calculating the real-time demand flow of air mixed with air according to a formula; and determining the air inlet valve opening value of the air supply pipeline connected with the mixer according to the real-time demand flow of air. According to the fluctuation of the concentration of the input low-concentration gas, the application directly generates the control amount of the air mixing flow, instead of passively regulating when the concentration and flow of the mixed gas change, so that the adaptability and timeliness of the gas distribution regulation to the demand of the heating furnace can be effectively improved.

Description

Technical Field

[0001] This invention relates to the field of energy utilization, and in particular to an automatic gas distribution method, apparatus, equipment, and storage medium for heating furnaces. Background Technology

[0002] Currently, low-concentration methane pumped by gas pumping stations with a concentration below 30% generally cannot be used directly. In order to save energy, low-concentration methane can be mixed into a mixing device to reduce the methane concentration to about 1.2% by incorporating air, and then transported to an oxidation device (such as a heating furnace) to generate usable energy through oxidation and heat release.

[0003] In existing technologies, gas distribution systems generally control the mixing ratio of low-concentration gas and air by adjusting the low-concentration gas inlet valve and the air inlet valve based on the concentration of gas after mixing with air collected by a concentration sensor.

[0004] Through research, the inventors discovered that the existing gas distribution system has defects in the control of the mixing ratio of low-concentration gas and air, with poor adjustment accuracy and timeliness (time-matching accuracy). It cannot adjust the gas production in a timely manner according to the fuel demand of oxidation devices such as heating furnaces, which is not conducive to the normal operation of heating furnaces.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to improve the adaptability to the fuel requirements of heating furnaces.

[0007] To achieve the above-mentioned objective, the present invention provides an automatic gas distribution method for a heating furnace, comprising the following steps:

[0008] S11. Calculate the fuel flow requirement of the heating furnace based on the real-time operating conditions of the heating furnace and the concentration of methane in the fuel.

[0009] S12. Real-time acquisition of the current supply concentration AW (%) of low-concentration methane in the methane supply pipeline;

[0010] S13. Using the fuel methane concentration as the setpoint ASV2 (%) for the gas concentration after gas mixing, and the fuel flow demand as the base value ASV1 (Nm3 / h) for the gas production flow, calculate the setpoint FIC101_SV' (Nm3 / h) for the supply flow of low-concentration gas according to the formula FIC101_SV' = ASV1 × ASV2 / AW; and determine the opening value of the gas inlet valve of the gas supply pipeline connected to the mixer according to the setpoint for the supply flow.

[0011] S14. Calculate the real-time air demand flow rate FIC102_SV' (Nm3 / h) for mixed air according to the formula FIC102_SV'=ASV1×(AW–ASV2) / AW; and determine the air intake valve opening value of the air supply pipeline connected to the mixer based on the real-time air demand flow rate.

[0012] Preferably, in this invention, it further includes:

[0013] S14. Acquire real-time monitoring information data; the monitoring information data includes the current value of the methane concentration in the gas produced after gas distribution, and the current value of the gas production flow rate FIQ103_PV, which are collected in real time in the gas production output pipeline.

[0014] S15. The calculated methane concentration APV1 is obtained by using the formula APV1=(FIC101_SV'×AW) / FIQ103_PV;

[0015] S16. Determine whether gas mixing is completed according to preset rules; the preset rules include: determining whether the difference between the calculated methane concentration and the current value of the produced methane concentration is less than a first preset value.

[0016] Preferably, in this invention, the preset rule further includes: determining whether the difference between the set value of the gas produced methane concentration and the current value of the gas produced methane concentration is less than a second preset value.

[0017] Preferably, in this invention, the preset rule further includes: determining whether the difference between the current value of the gas production flow rate and the basic value of the gas production flow rate is less than a third preset value.

[0018] Preferably, in this invention, it further includes:

[0019] If the result of determining whether gas distribution is complete is negative, close the gas generation valve located in the gas generation output pipeline and open the vent valve located in the gas generation output pipeline; if the result of determining whether gas distribution is complete is positive, close the vent valve and open the gas generation valve.

[0020] In another aspect of the invention, an automatic gas distribution system for a heating furnace is also provided, including a gas supply pipeline, an air supply pipeline, a gas production output pipeline, a mixer, and an automatic gas distribution device for a heating furnace.

[0021] The gas supply pipeline connected to the mixer is equipped with a gas inlet valve; the air supply pipeline connected to the mixer is equipped with an air inlet valve; and the gas output pipeline used to connect the mixer and the heating furnace is equipped with a gas generation valve.

[0022] The automatic gas distribution device for the heating furnace includes:

[0023] The real-time data acquisition unit is used to collect the current supply concentration AW (%) of low-concentration methane in the methane supply pipeline in real time.

[0024] The first calculation unit is used to take the fuel methane concentration as the gas concentration setpoint ASV2 (%) of the gas after gas mixing, take the fuel flow demand value as the gas production flow base value ASV1 (Nm3 / h), and calculate the low-concentration gas supply flow setpoint FIC101_SV' (Nm3 / h) according to the formula FIC101_SV'=ASV1×ASV2 / AW; and determine the gas inlet valve opening value of the gas supply pipeline connected to the mixer according to the supply flow setpoint.

[0025] The second calculation unit is used to calculate the real-time air demand flow rate FIC102_SV' (Nm3 / h) of the mixed air according to the formula FIC102_SV'=ASV1×(AW–ASV2) / AW; and to determine the air intake valve opening value of the air supply pipeline connected to the mixer according to the real-time air demand flow rate.

[0026] Preferably, in this invention, the automatic gas distribution device for the heating furnace further includes:

[0027] The monitoring information acquisition unit is used to acquire real-time monitoring information data; the monitoring information data includes the current value of the methane concentration in the gas produced after gas distribution, and the current value of the gas production flow rate FIQ103_PV, which are collected in real time in the gas production output pipeline.

[0028] The gas production concentration calculation unit is used to calculate the methane concentration APV1 based on the formula APV1=(FIC101_SV'×AW) / FIQ103_PV.

[0029] The determination unit is used to determine whether gas mixing is completed according to preset rules; the preset rules include: determining whether the difference between the calculated methane concentration and the current value of the produced methane concentration is less than a first preset value.

[0030] Preferably, in this invention, the preset rule further includes: determining whether the difference between the set value of the gas produced methane concentration and the current value of the gas produced methane concentration is less than a second preset value.

[0031] Preferably, in this invention, the preset rule further includes: determining whether the difference between the current value of the gas production flow rate and the basic value of the gas production flow rate is less than a third preset value.

[0032] Preferably, in this invention, it further includes:

[0033] The vent control unit is used to close the gas generation valve in the gas generation output pipeline and open the vent valve in the gas generation output pipeline when the judgment result of whether the gas distribution is completed is negative; and to close the vent valve and open the gas generation valve when the judgment result of whether the gas distribution is completed is positive.

[0034] Preferably, in this invention, the gas output pipeline further includes a flame arrester.

[0035] Preferably, in this invention, the gas output pipeline further includes an explosion-suppressing water spray device.

[0036] In another aspect of this invention, an automatic gas distribution device for a heating furnace is also provided, comprising:

[0037] Memory, used to store computer programs;

[0038] A processor is used to invoke and execute the computer program to implement the various steps of the automatic gas distribution method for a heating furnace as described in any of the preceding claims.

[0039] In another aspect of the present invention, a storage medium is also provided, on which a computer program is stored, which, when executed by a processor, implements the various steps of the automatic gas distribution method for a heating furnace as described in any of the preceding claims.

[0040] The automatic gas distribution device for the heating furnace includes a computer program stored on a medium. The computer program includes program instructions that, when executed by the computer, cause the computer to perform the methods described in the above aspects and achieve the same technical effect.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] As can be seen from the above scheme, the automatic gas distribution method for heating furnaces provided by this invention no longer simply adjusts the low-concentration gas inlet valve and air inlet valve based on the concentration of gas after mixing with air collected by a concentration sensor. Instead, it organically combines the operating conditions and demands of its downstream equipment (heating furnace). After calculating the required fuel flow rate based on the real-time operating conditions of the heating furnace and the fuel methane concentration, the opening values ​​of the gas inlet valve and air inlet valve are adjusted according to the actual demand. This allows for the rapid determination of the appropriate low-concentration gas flow rate based on the heating furnace's requirements. The invention can proactively adjust the gas and air intake flow rates when the heating furnace's requirements change or when the concentration of the input low-concentration gas changes. This effectively reduces the fluctuation range of gas concentration caused by fluctuations in the input low-concentration gas concentration. Since the invention does not passively adjust the mixed gas flow rate only when the concentration and flow rate change, it effectively improves the adaptability and timeliness (time-matching accuracy) of the gas distribution adjustment to the heating furnace's requirements, thus facilitating the normal operation of the heating furnace.

[0043] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, and to make the above and other objects, technical features and advantages of the present invention easier to understand, one or more preferred embodiments are listed below and described in detail with reference to the accompanying drawings. Attached Figure Description

[0044] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a flowchart illustrating the steps of the automatic gas distribution method for a heating furnace described in this invention.

[0046] Figure 2 This is a schematic diagram of the automatic gas distribution system for a heating furnace described in this invention;

[0047] Figure 3 This is another step diagram of the automatic gas distribution method for heating furnaces described in this invention;

[0048] Figure 4 This is a schematic diagram of the automatic gas distribution device for a heating furnace described in this invention;

[0049] Figure 5This is a schematic diagram of the automatic gas distribution device for heating furnaces described in this invention. Detailed Implementation

[0050] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0051] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0052] In this document, the terms "first," "second," etc., are used to distinguish two different elements or parts, and are not used to define specific positions or relative relationships. In other words, in some embodiments, the terms "first," "second," etc., can also be used interchangeably.

[0053] Example 1

[0054] In order to effectively improve the adjustment accuracy and timeliness of valve timing, such as Figure 1 As shown, an embodiment of the present invention provides an automatic gas distribution method for a heating furnace, comprising the following steps:

[0055] S11. Calculate the fuel flow requirement of the heating furnace based on the real-time operating conditions of the heating furnace and the concentration of methane in the fuel.

[0056] The automatic gas distribution method for a heating furnace according to embodiments of the present invention can be implemented in a specific automatic gas distribution system for a heating furnace, which includes, for example, […]. Figure 2 The physical working equipment shown includes a gas supply line 11, an air supply line 21, a gas output line 41, a mixer 31, and, as well as... Figure 4 The working equipment shown is an automatic gas distribution device for a heating furnace. As a device with data processing capabilities, the automatic gas distribution device for the heating furnace can work in conjunction with an automatic control device for valve regulation to implement the low-concentration gas distribution control method in this embodiment of the invention, so as to regulate the valves in each pipeline, thereby controlling the gas flow in each pipeline and achieving the purpose of gas distribution regulation.

[0057] Automatic gas distribution for heating furnaces refers to the process of mixing low-concentration gas and air, and adjusting and controlling the ratio of low-concentration gas and air to ensure that the methane concentration of the mixed gas (i.e., the produced gas) meets the specific industrial application requirements. In this embodiment of the invention, the produced gas generated after mixing by a mixer is supplied to the heating furnace for oxidation and exothermic processes.

[0058] In practical applications, the smaller the fluctuation in methane concentration in the gas produced after mixing by the mixer, the higher the energy utilization rate of the gas and the higher the safety of production. In addition, the ability of the gas flow rate to be adapted to the needs of downstream devices in real time is also conducive to the normal operation of downstream devices (such as heating furnaces) and improves production efficiency.

[0059] Therefore, in this embodiment of the invention, the supply flow rate of low-concentration methane in the gas supply pipeline 11 can be determined by calculating the fuel flow rate requirement of the heating furnace based on the real-time operating conditions of the heating furnace and the methane concentration of the fuel.

[0060] In practical applications, the fuel flow demand of the heating furnace can be calculated based on the real-time operating conditions and fuel methane concentration. This can be generated by heat conversion calculation or by using historical operating data of the heating furnace as modeling data. A predictive model that can predict the corresponding fuel flow demand based on the real-time operating conditions of the heating furnace can be generated through data training. This enables the calculation of the fuel flow demand of the heating furnace based on the real-time operating conditions and fuel methane concentration.

[0061] S12. Real-time acquisition of the current supply concentration AW (%) of low-concentration methane in the methane supply pipeline;

[0062] When calculating the supply of low-concentration gas, it is necessary to calculate based on the concentration of low-concentration gas in the gas supply pipeline 11, and therefore the current supply concentration of low-concentration gas AW (%) must also be obtained.

[0063] S13. Using the fuel methane concentration as the setpoint ASV2 (%) for the gas concentration after gas mixing, and the fuel flow demand as the base value ASV1 (Nm3 / h) for the gas production flow, calculate the setpoint FIC101_SV' (Nm3 / h) for the supply flow of low-concentration gas according to the formula FIC101_SV' = ASV1 × ASV2 / AW; and determine the opening value of the gas inlet valve of the gas supply pipeline connected to the mixer according to the setpoint for the supply flow.

[0064] Based on the functional relationship between gas concentration and volume (in this embodiment of the invention, flow rate is used as an indirect parameter equivalent to volume), this embodiment of the invention sets a formula (Formula 1) for calculating the supply flow rate setting value of low-concentration gas entering the gas supply pipeline 11.

[0065] FIC101_SV'=ASV1×ASV2 / AW, formula (1)

[0066] In formula (1), FIC101_SV' is the set value of the supply flow rate of low-concentration methane, in units of (Nm3 / h); ASV1 is the set base value of the gas production flow rate after gas distribution, in units of (Nm3 / h); ASV2 is the set value of the methane concentration in the gas production, in units of (%); AW is the current supply concentration of low-concentration methane collected in real time, in units of (%).

[0067] Next, based on the correspondence between gas pressure, gas flow rate and valve opening, the opening value of gas inlet valve 12 (i.e., gas inlet valve opening value) is determined by calculating the supply flow rate set value.

[0068] In this embodiment of the invention, the basic value of gas production flow rate refers to the flow rate of gas produced by the gas distribution system to the heating furnace; the set value of gas production methane concentration refers to the target concentration of gas produced required by the heating furnace; the current supply concentration (AW(%)) refers to the concentration of low-concentration gas in the gas supply pipeline 11; and the supply flow rate set value (FIC101_SV') refers to the target flow rate of low-concentration gas in the gas supply pipeline 11 (controlled by the gas inlet valve 12).

[0069] It should be noted that this step can be performed during the initial gas mixing, or when fluctuations in the low concentration of gas in the intake cause the gas concentration or flow rate to exceed the standard, in order to determine the appropriate opening value of the gas intake valve.

[0070] S14. Calculate the real-time air demand flow rate FIC102_SV' (Nm3 / h) for mixed air according to the formula FIC102_SV'=ASV1×(AW–ASV2) / AW; and determine the air intake valve opening value of the air supply pipeline connected to the mixer based on the real-time air demand flow rate.

[0071] Based on the gas inlet valve 12 being at a suitable opening value, it is necessary to further determine the air supply amount; according to the functional relationship between gas concentration and volume, this embodiment of the invention also sets a formula (Formula 2) for calculating the real-time air demand flow rate in the air supply pipeline 21.

[0072] FIC102_SV'=ASV1×(AW–ASV2) / AW, (Formula 2);

[0073] In (Formula 2), FIC102_SV' is the real-time air demand flow rate with added air, in units of (Nm3 / h).

[0074] Next, based on the relationship between gas pressure, gas flow rate and valve opening, the opening value of air intake valve 22 (i.e., air intake valve opening value) is determined by calculating the required air volume.

[0075] Through the above steps, the opening values ​​of the gas inlet valve 12 and the air inlet valve 22 can be controlled in a timely manner according to the different current supply concentrations of low-concentration gas, before the methane concentration of the produced gas fluctuates, or when the fuel demand of the heating furnace changes. This ensures that the methane concentration after gas distribution remains basically stable, and that the flow rate of the produced gas can be adapted to the fuel supply demand of the heating furnace in real time.

[0076] In summary, the automatic gas distribution method for a heating furnace provided by this invention no longer simply adjusts the low-concentration gas inlet valve and air inlet valve based on the concentration of gas after mixing with air collected by a concentration sensor. Instead, it organically integrates the method with the operating conditions and demands of the downstream equipment (heating furnace). After calculating the required fuel flow rate based on the real-time operating conditions of the heating furnace and the fuel methane concentration, the opening values ​​of the gas inlet valve and air inlet valve are adjusted according to the actual demand. This allows for the rapid determination of a suitable inlet flow rate for low-concentration gas based on the heating furnace's requirements. The volume and air inlet flow rate; because the embodiments of the present invention can actively pre-adjust the gas inlet flow rate and air inlet flow rate when the demand of the heating furnace changes, or when the concentration of the input low-concentration gas changes, the concentration fluctuation of the generated gas caused by the concentration fluctuation of the input low-concentration gas can be effectively reduced; because the embodiments of the present invention do not wait for the concentration and flow rate of the mixed gas to change before passively adjusting, the adaptability and timeliness (time-matching accuracy) of the gas distribution adjustment to the demand of the heating furnace can be effectively improved, which is conducive to the normal operation of the heating furnace.

[0077] Example 2

[0078] Based on Example 1, such as Figure 3 As shown, the automatic gas distribution method for a heating furnace in this embodiment of the invention may further include the following steps:

[0079] S15. Acquire real-time monitoring information data; the monitoring information data includes the current value of the methane concentration in the gas produced after gas distribution, and the current value of the gas production flow rate FIQ103_PV, which are collected in real time in the gas production output pipeline.

[0080] To improve the safety and stability of automatic gas distribution, this embodiment of the invention further includes a step for judging the completion of gas distribution. To do this, relevant monitoring information data must first be obtained as the basis for judgment.

[0081] The current value of the methane concentration in the gas produced by the gas output pipeline 41 is the most intuitive result indicator of the methane concentration in the gas produced (i.e., the current value of the methane concentration in the gas produced). By installing a concentration sensor in the gas output pipeline 41, the methane concentration value in the gas produced (i.e., the current value of the methane concentration in the gas produced) can be obtained in real time.

[0082] In addition, the monitoring information data also includes the gas production flow rate value (i.e., the current value of gas production flow rate) collected in real time on the gas production output pipeline 41.

[0083] S16. According to formula (3), the theoretical methane concentration in the gas output pipeline 41 (i.e., the calculated methane concentration) can also be calculated.

[0084] APV1=(FIC101_SV'×AW) / FIQ103_PV, formula (3);

[0085] In formula (3), APV1 is the calculated methane concentration in (%); FIQ103_PV is the gas flow rate value collected in real time in the gas output pipeline 41 (i.e., the current gas flow rate value).

[0086] S17. Determine whether gas mixing is completed according to preset rules; the preset rules include: determining whether the difference between the calculated methane concentration and the current value of the produced methane concentration is less than a first preset value.

[0087] Once the gas mixing is complete, the calculated methane concentration should be basically consistent with the actual measured current value of the produced methane concentration. Therefore, whether the difference between the calculated methane concentration and the current value of the produced methane concentration is less than the first preset value can be used as a primary criterion to determine whether the gas mixing is complete.

[0088] In practical applications, the first preset value can be set by those skilled in the art based on the actual situation and the fluctuation accuracy of the gas production concentration, and no specific limitation is made here.

[0089] Furthermore, in this embodiment of the invention, the preset rule may also include: determining whether the difference between the set value of the gas produced methane concentration and the current value of the gas produced methane concentration is less than a second preset value.

[0090] In this embodiment of the invention, a set value for the final methane concentration of the produced gas is initially set. This set value is suitable for the production requirements of the heating furnace. In order to meet the requirements of safe production and the operation requirements of the heating furnace, in this embodiment of the invention, the gas distribution can be further determined by judging whether the difference between the set value of the produced gas methane concentration and the current value of the produced gas methane concentration is less than a second preset value, so as to ensure that the final methane concentration of the produced gas meets the requirements of safe production and good operation of the device.

[0091] In practical applications, the second preset value can also be set by those skilled in the art based on the actual situation and the required floating accuracy of the gas concentration, and no specific limitation is made here.

[0092] Furthermore, in this embodiment of the invention, the preset rule may further include: determining whether the difference between the current value of the gas production flow rate and the baseline value of the gas production flow rate is less than a third preset value. In this way, the stability and conformity of the gas production flow rate to expectations are used as another criterion for determining whether gas distribution is complete, thereby further increasing safety in the actual production process and better meeting the requirements for smooth operation of the device.

[0093] In practical applications, to ensure the safety of gas distribution and prevent substandard gas from being used in downstream equipment (such as heating furnaces), embodiments of the present invention may further include the following steps:

[0094] If the result of determining whether gas distribution is complete is negative, the gas generation valve 42 located in the gas generation output pipeline 41 is closed and the vent valve 43 located in the gas generation output pipeline is opened; if the result of determining whether gas distribution is complete is positive, the vent valve 43 is closed and the gas generation valve 42 is opened.

[0095] Based on the judgment result of whether gas distribution is completed, the opening and closing of the vent valve 43 and the gas production valve 42 are controlled accordingly, so that gas production is put into operation only after gas distribution is completed, thereby ensuring the safety of the production process.

[0096] Preferably, in this embodiment of the invention, a return gas pipeline 51 can be provided between the vent valve 43 and the gas inlet valve 12, so as to recover and utilize the generated gas that does not meet the needs of the downstream device into the gas supply pipeline 11, thereby avoiding energy waste.

[0097] Example 3

[0098] Corresponding to the method embodiment, another aspect of the present invention provides an automatic gas distribution system for a heating furnace, including an automatic gas distribution device for the heating furnace. Figure 4 This diagram illustrates the structure of an automatic gas distribution device for a heating furnace according to an embodiment of the present invention. The automatic gas distribution device for the heating furnace is... Figure 1 or Figure 3 The device corresponding to the automatic gas distribution method for the heating furnace described in the corresponding embodiment is implemented through a virtual device. Figure 1 or Figure 3 In the corresponding embodiment, the automatic gas distribution method for the heating furnace, each virtual module constituting the automatic gas distribution device for the heating furnace can be executed by electronic devices, such as network devices, terminal devices, or servers.

[0099] Specifically, refer to Figure 2The automatic gas distribution system for a heating furnace in this embodiment of the invention includes physical working equipment: a gas supply pipeline, an air supply pipeline, a gas production output pipeline, and a mixer, as well as physical working equipment: an automatic gas distribution device for a heating furnace.

[0100] The gas supply pipeline 11 connected to the mixer 31 is provided with a gas inlet valve 12; the air supply pipeline 21 connected to the mixer 31 is provided with an air inlet valve 22; the gas output pipeline 41 used to connect the mixer 31 and the heating furnace is provided with a gas output valve 42.

[0101] The automatic gas distribution device for the heating furnace includes:

[0102] Fuel demand generation unit 01 is used to calculate the fuel flow demand value of the heating furnace based on the real-time operating conditions of the heating furnace and the methane concentration of the fuel.

[0103] Real-time data acquisition unit 02 is used to collect the current supply concentration AW (%) of low-concentration methane in the methane supply pipeline in real time;

[0104] The first calculation unit 03 is used to take the fuel methane concentration as the gas concentration setpoint ASV2 (%) of the gas after gas mixing, take the fuel flow demand value as the gas production flow base value ASV1 (Nm3 / h), calculate the low-concentration gas supply flow setpoint FIC101_SV' (Nm3 / h) according to the formula FIC101_SV'=ASV1×ASV2 / AW; and determine the gas inlet valve opening value of the gas supply pipeline connected to the mixer according to the supply flow setpoint.

[0105] The second calculation unit 04 is used to calculate the real-time air demand flow rate FIC102_SV' (Nm3 / h) of the mixed air according to the formula FIC102_SV'=ASV1×(AW–ASV2) / AW; and to determine the air intake valve opening value of the air supply pipeline connected to the mixer according to the real-time air demand flow rate.

[0106] Furthermore, in this embodiment of the invention, the automatic gas distribution device for the heating furnace may further include:

[0107] The monitoring information acquisition unit 05 is used to acquire real-time monitoring information data; the monitoring information data includes the current value of the methane concentration in the gas produced after gas distribution, and the current value of the gas production flow rate FIQ103_PV, which are collected in real time in the gas production output pipeline.

[0108] The gas production concentration calculation unit 06 is used to calculate the methane concentration APV1 based on the formula APV1=(FIC101_SV'×AW) / FIQ103_PV;

[0109] The determination unit 07 is used to determine whether gas mixing is completed according to preset rules; the preset rules include: determining whether the difference between the calculated methane concentration and the current value of the produced methane concentration is less than a first preset value.

[0110] Preferably, in embodiments of the present invention, it may further include:

[0111] The vent control unit is used to close the gas generation valve in the gas generation output pipeline and open the vent valve in the gas generation output pipeline when the judgment result of whether the gas distribution is completed is negative; and to close the vent valve and open the gas generation valve when the judgment result of whether the gas distribution is completed is positive.

[0112] Preferably, in this embodiment of the invention, a return gas pipeline can also be provided between the vent valve and the gas inlet valve, so as to realize the recovery and utilization of the produced gas that does not meet the needs of the downstream device into the gas supply pipeline, thereby avoiding energy waste.

[0113] In addition, to improve the safety of the gas distribution control process, in this embodiment of the invention, a flame arrester and / or an explosion-suppressing water spray device may also be provided in the gas output pipeline to avoid the occurrence of dangerous accidents such as accidental combustion and explosion.

[0114] It should be noted that the specific implementation methods and technical effects of the automatic gas distribution system and automatic gas distribution device for the heating furnace in the embodiments of the present invention can be found by referring to... Figure 1 and Figure 3 The corresponding automatic gas distribution method for heating furnaces will not be elaborated here.

[0115] Example 4

[0116] Corresponding to the method embodiments, this invention also provides an automatic gas distribution device for a heating furnace, which may include, for example, a terminal or a server. The server can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms. The terminal can be a smartphone, tablet, laptop, desktop computer, etc., but is not limited to these.

[0117] An example diagram of the hardware structure block diagram of the automatic gas distribution device for a heating furnace provided in this application embodiment is shown below. Figure 5 As shown, it may include:

[0118] Processor 1, communication interface 2, memory 3, and communication bus 4;

[0119] The processor 1, communication interface 2, and memory 3 communicate with each other via communication bus 4.

[0120] Optionally, communication interface 2 can be an interface of a communication module, such as the interface of a GSM module;

[0121] Processor 1 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0122] Memory 3 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0123] Specifically, processor 1 is used to execute the computer program stored in memory 3 to perform the following steps:

[0124] S11. Calculate the fuel flow requirement of the heating furnace based on the real-time operating conditions of the heating furnace and the concentration of methane in the fuel.

[0125] S12. Real-time acquisition of the current supply concentration AW (%) of low-concentration methane in the methane supply pipeline;

[0126] S13. Using the fuel methane concentration as the setpoint ASV2 (%) for the gas concentration after gas mixing, and the fuel flow demand as the base value ASV1 (Nm3 / h) for the gas production flow, calculate the setpoint FIC101_SV' (Nm3 / h) for the supply flow of low-concentration gas according to the formula FIC101_SV' = ASV1 × ASV2 / AW; and determine the opening value of the gas inlet valve of the gas supply pipeline connected to the mixer according to the setpoint for the supply flow.

[0127] S14. Calculate the real-time air demand flow rate FIC102_SV' (Nm3 / h) for mixed air according to the formula FIC102_SV'=ASV1×(AW–ASV2) / AW; and determine the air intake valve opening value of the air supply pipeline connected to the mixer based on the real-time air demand flow rate.

[0128] Preferably, in embodiments of the present invention, it may further include:

[0129] S15. Acquire real-time monitoring information data; the monitoring information data includes the current value of the methane concentration in the gas produced after gas distribution, and the current value of the gas production flow rate FIQ103_PV, which are collected in real time in the gas production output pipeline.

[0130] S16. The calculated methane concentration APV1 is obtained by using the formula APV1=(FIC101_SV'×AW) / FIQ103_PV;

[0131] S17. Determine whether gas mixing is completed according to preset rules; the preset rules include: determining whether the difference between the calculated methane concentration and the current value of the produced methane concentration is less than a first preset value.

[0132] The above-described product can execute the method provided in the embodiments of the present invention, and has the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in this embodiment can be found in the automatic gas distribution method for heating furnaces provided in the embodiments of the present invention.

[0133] Example 5

[0134] In this embodiment of the invention, a storage medium is also provided, which can store a program suitable for execution by a processor, the program being used for:

[0135] S11. Calculate the fuel flow requirement of the heating furnace based on the real-time operating conditions of the heating furnace and the concentration of methane in the fuel.

[0136] S12. Real-time acquisition of the current supply concentration AW (%) of low-concentration methane in the methane supply pipeline;

[0137] S13. Using the fuel methane concentration as the setpoint ASV2 (%) for the gas concentration after gas mixing, and the fuel flow demand as the base value ASV1 (Nm3 / h) for the gas production flow, calculate the setpoint FIC101_SV' (Nm3 / h) for the supply flow of low-concentration gas according to the formula FIC101_SV' = ASV1 × ASV2 / AW; and determine the opening value of the gas inlet valve of the gas supply pipeline connected to the mixer according to the setpoint for the supply flow.

[0138] S14. Calculate the real-time air demand flow rate FIC102_SV' (Nm3 / h) for mixed air according to the formula FIC102_SV'=ASV1×(AW–ASV2) / AW; and determine the air intake valve opening value of the air supply pipeline connected to the mixer based on the real-time air demand flow rate.

[0139] Preferably, in embodiments of the present invention, it may further include:

[0140] S15. Acquire real-time monitoring information data; the monitoring information data includes the current value of the methane concentration in the gas produced after gas distribution, and the current value of the gas production flow rate FIQ103_PV, which are collected in real time in the gas production output pipeline.

[0141] S16. The calculated methane concentration APV1 is obtained by using the formula APV1=(FIC101_SV'×AW) / FIQ103_PV;

[0142] S17. Determine whether gas mixing is completed according to preset rules; the preset rules include: determining whether the difference between the calculated methane concentration and the current value of the produced methane concentration is less than a first preset value.

[0143] Optionally, the refined and extended functions of the program can be found in the description above.

[0144] The above-described product can execute the methods provided in the embodiments of the present invention, and has the corresponding functional modules and beneficial effects for executing the methods. Technical details not described in detail in this embodiment can be found in the methods provided in other embodiments of the present invention.

[0145] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0146] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. Furthermore, the couplings or direct couplings or communication connections shown or discussed may be indirect couplings or communication connections through interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0147] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0148] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0149] It should be understood that in the embodiments of this application, the claims, various embodiments, and features can be combined with each other to solve the aforementioned technical problems.

[0150] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0151] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic gas distribution method for a heating furnace, characterized in that, Including the following steps: S11. Calculate the fuel flow requirement of the heating furnace based on the real-time operating conditions of the heating furnace and the concentration of methane in the fuel. S12. Real-time acquisition of the current supply concentration AW (%) of low-concentration methane in the methane supply pipeline. S13. The fuel methane concentration is used as the setpoint ASV2 (%) for the gas produced after gas mixing, and the fuel flow rate requirement is used as the base value ASV1 (Nm³) for the gas produced. 3 / h), calculate the supply flow setpoint FIC101_SV' (Nm³) for low-concentration methane according to the formula FIC101_SV' = ASV1×ASV2 / AW. 3 / h); and determine the gas inlet valve opening value of the gas supply pipeline connected to the mixer based on the supply flow rate setting value; S14. Calculate the real-time air demand flow rate FIC102_SV' (Nm³) for the mixed air according to the formula FIC102_SV' = ASV1 × (AW – ASV2) / AW. 3 / h); and determine the air intake valve opening value of the air supply pipeline connected to the mixer based on the real-time air demand flow rate; S15. Acquire real-time monitoring information data; the monitoring information data includes the current value of the methane concentration in the gas produced after gas distribution, and the current value of the gas production flow rate FIQ103_PV, which are collected in real-time from the gas production output pipeline. S16. The calculated methane concentration APV1 is obtained by using the formula APV1 = (FIC101_SV' × AW) / FIQ103_PV; S17. Determine whether the gas mixing is complete according to the preset rules; The preset rule includes: determining whether the difference between the calculated methane concentration and the current value of the produced methane concentration is less than a first preset value.

2. The automatic gas distribution method for a heating furnace according to claim 1, characterized in that, The preset rule also includes: determining whether the difference between the set value of the gas produced methane concentration and the current value of the gas produced methane concentration is less than a second preset value.

3. The automatic gas distribution method for a heating furnace according to claim 1, characterized in that, The preset rule also includes: determining whether the difference between the current value of the gas production flow rate and the basic value of the gas production flow rate is less than a third preset value.

4. The automatic gas distribution method for a heating furnace according to any one of claims 1 to 3, characterized in that, Also includes: If the result of the judgment that the gas distribution is completed is yes, close the vent valve and open the gas production valve; otherwise, close the gas production valve located in the gas production output pipeline and open the vent valve located in the gas production output pipeline.

5. An automatic gas distribution system for a heating furnace, characterized in that, Includes gas supply pipelines, air supply pipelines, gas output pipelines, mixers, and automatic gas distribution devices for heating furnaces; The gas supply pipeline connected to the mixer is equipped with a gas inlet valve; the air supply pipeline connected to the mixer is equipped with an air inlet valve; and the gas output pipeline used to connect the mixer and the heating furnace is equipped with a gas generation valve. The automatic gas distribution device for the heating furnace includes: The fuel demand generation unit is used to calculate the fuel flow demand value of the heater based on the real-time operating conditions of the heater and the methane concentration of the fuel. The real-time data acquisition unit is used to collect the current supply concentration AW (%) of low-concentration methane in the methane supply pipeline in real time. The first calculation unit is used to use the fuel methane concentration as the setpoint ASV2 (%) for the gas produced after gas mixing, and the fuel flow rate requirement as the base value ASV1 (Nm³) for the gas produced. 3 / h), calculate the supply flow setpoint FIC101_SV' (Nm³) for low-concentration methane according to the formula FIC101_SV' = ASV1 × ASV2 / AW. 3 / h); and determine the gas inlet valve opening value of the gas supply pipeline connected to the mixer based on the supply flow rate setting value; The second calculation unit is used to calculate the real-time air demand flow rate FIC102_SV' (Nm³) of the mixed air according to the formula FIC102_SV' = ASV1 × (AW – ASV2) / AW. 3 / h); and determine the air intake valve opening value of the air supply pipeline connected to the mixer based on the real-time air demand flow rate; The monitoring information acquisition unit is used to acquire real-time monitoring information data; the monitoring information data includes the current value of the methane concentration in the gas produced after gas distribution, and the current value of the gas production flow rate FIQ103_PV, which are collected in real time in the gas production output pipeline. The gas production concentration calculation unit is used to calculate the methane concentration APV1 based on the formula APV1=(FIC101_SV'×AW) / FIQ103_PV; The determination unit is used to determine whether the gas distribution meets the standard according to preset rules; the preset rules include: determining whether the difference between the calculated methane concentration and the current value of the produced methane concentration is less than a first preset value.

6. The automatic gas distribution system for a heating furnace according to claim 5, characterized in that, The preset rule also includes: determining whether the difference between the set value of the gas produced methane concentration and the current value of the gas produced methane concentration is less than a second preset value.

7. The automatic gas distribution system for a heating furnace according to claim 5, characterized in that, The preset rule also includes: determining whether the difference between the current value of the gas production flow rate and the basic value of the gas production flow rate is less than a third preset value.

8. The automatic gas distribution system for a heating furnace according to any one of claims 5 to 7, characterized in that, Also includes: The vent control unit is used to close the vent valve and open the gas generation valve when the judgment result of whether the gas distribution meets the standard is yes; otherwise, it closes the gas generation valve provided in the gas generation output pipeline and opens the vent valve provided in the gas generation output pipeline.

9. The automatic gas distribution system for a heating furnace according to claim 5, characterized in that, The gas output pipeline also includes a flame arrester.

10. The automatic gas distribution system for a heating furnace according to claim 5, characterized in that, The gas output pipeline also includes an explosion suppression water spray device.

11. The automatic gas distribution system for a heating furnace according to claim 10, characterized in that, Also includes: A return line used to connect the vent valve and the gas inlet valve at the inlet end.

12. An automatic gas distribution device for a heating furnace, characterized in that, include: Memory, used to store computer programs; A processor for invoking and executing the computer program to implement the steps of the automatic gas distribution method for a heating furnace as described in any one of claims 1 to 4.

13. A storage medium, characterized in that, Includes a software program adapted for execution by a processor of the steps of the automatic gas distribution method for a heating furnace as described in any one of claims 1 to 4.

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