Low-concentration gas distribution control method, system, device and storage medium

Abstract

The application discloses a low-concentration gas distribution control method, system, equipment and storage medium. The method comprises the following steps: setting a gas distribution flow basic value, a methane concentration setting value of the produced gas, and collecting the current supply concentration of the low-concentration gas in real time; calculating the supply flow setting value of the low-concentration gas according to a formula; determining the gas inlet valve opening value of the gas supply pipe section connected with the mixer according to the supply flow setting value; calculating the real-time demand flow of the air mixed with the low-concentration gas according to a formula; and determining the air inlet valve opening value of the air supply pipe section connected with the mixer according to the real-time demand flow of the air. According to the fluctuation of the input low-concentration gas concentration, 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 regulation accuracy and timeliness of the gas distribution regulation can be effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of energy utilization, in particular to a low-concentration gas mixing control method, device, equipment and storage medium. BACKGROUND

[0002] At present, low-concentration gas with a concentration of less than 30% pumped by a gas pumping station generally cannot be directly utilized. In order to save energy, the low-concentration gas can be mixed in a mixing device, the concentration of the gas is reduced to about 1.2% by mixing air, and then the gas is transported into an oxidation device (such as a heating furnace) to generate energy by oxidation and heat release. The control of the mixing ratio of the low-concentration gas and the air is the key to energy saving.

[0003] In the prior art, the mixing ratio of the low-concentration gas and the air is controlled by adjusting the low-concentration gas inlet valve and the air inlet valve according to the concentration of the mixed air obtained by the concentration sensor.

[0004] The inventor finds that when the supply concentration and flow of the low-concentration gas fluctuate, the control of the mixing ratio of the low-concentration gas and the air in the prior art has defects of poor adjustment accuracy and timeliness (time matching accuracy), which is not conducive to the normal operation of the system.

[0005] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the background of the present application and should not be regarded as an acknowledgment or any form of suggestion that this information forms prior art that is publicly known. SUMMARY

[0006] The purpose of the present application is to improve the adjustment accuracy and timeliness of the control of the mixing ratio of the low-concentration gas and the air.

[0007] In order to achieve the above-mentioned purpose of the present application, the present application provides a low-concentration gas mixing control method, comprising the steps of:

[0008] S11, setting a gas mixing flow basis value ASV1 (Nm3 / h) and a gas methane concentration setting value ASV2 (%), and collecting a current supply concentration AW (%) of the low-concentration gas in real time;

[0009] S12, calculating a supply flow setting value FIC101_SV' (Nm3 / h) of the low-concentration gas according to the formula FIC101_SV' = ASV1 x ASV2 / AW, and determining a gas inlet valve opening value of a gas supply pipe section connected with a mixer according to the supply flow setting value;

[0010] S13, calculating the air real-time demand flow FIC102_SV' (Nm3 / h) of the air mixed according to the formula FIC102_SV'=ASV1×(AW-ASV2) / AW, and determining the air inlet valve opening value of the air supply pipe segment connected with the mixer according to the air real-time demand flow.

[0011] Preferably, in the present application, further comprising:

[0012] S14, acquiring the real-time monitoring information data; the monitoring information data includes the current value of the methane concentration of the produced gas after the gas distribution is collected in real time in the produced gas output pipe segment, and the current value of the produced gas flow FIQ103_PV;

[0013] S15, calculating the methane concentration calculation value APV1 according to the formula APV1=(FIC101_SV'×AW) / FIQ103_PV;

[0014] S16, judging whether the gas distribution is completed according to the preset rule; the preset rule includes judging whether the difference between the methane concentration calculation value and the current value of the methane concentration of the produced gas is less than a first preset value.

[0015] Preferably, in the present application, the preset rule further includes judging whether the difference between the set value of the methane concentration of the produced gas and the current value of the methane concentration of the produced gas is less than a second preset value.

[0016] Preferably, in the present application, the preset rule further includes judging whether the difference between the current value of the produced gas flow and the basic value of the produced gas flow is less than a third preset value.

[0017] Preferably, in the present application, further comprising:

[0018] When the judgment result of whether the gas distribution is completed is no, closing the produced gas valve arranged in the produced gas output pipe segment and opening the vent valve arranged in the produced gas output pipe segment; when the judgment result of whether the gas distribution is completed is yes, closing the vent valve and opening the produced gas valve.

[0019] In another aspect of the present application, a low-concentration gas distribution control system is also provided, which comprises a gas supply pipe segment, an air supply pipe segment, a produced gas output pipe segment, a mixer, and a low-concentration gas distribution control device.

[0020] The gas supply pipe segment connected with the mixer is provided with a gas inlet valve; the air supply pipe segment connected with the mixer is provided with an air inlet valve; the produced gas output pipe segment for connecting the mixer and the oxidation device is provided with a produced gas valve.

[0021] The low-concentration gas distribution control device comprises:

[0022] The preset unit is configured to set a gas production flow basic value ASV1 (Nm3 / h) and a gas production methane concentration setting value ASV2 (%) after gas distribution, and obtain a current supply concentration AW (%) of low-concentration gas collected in real time;

[0023] The intake flow control unit is configured to calculate a supply flow setting value FIC101_SV' (Nm3 / h) of the low-concentration gas according to a formula FIC101_SV' = ASV1 × ASV2 / AW, and determine a gas intake valve opening value of the gas intake valve according to the supply flow setting value.

[0024] The air flow control unit is configured to calculate an air real-time demand flow FIC102_SV' (Nm3 / h) of the mixed air according to a formula FIC102_SV' = ASV1 × (AW-ASV2) / AW, and determine an air intake valve opening value of the air intake valve according to the air real-time demand flow.

[0025] Preferably, in the present application, the low-concentration gas distribution control device further comprises:

[0026] The monitoring information acquisition unit is configured to obtain monitoring information data collected in real time; the monitoring information data includes a current value of the methane concentration of the gas produced after distribution and a current value of the gas production flow FIQ103_PV collected in real time in the gas output pipe section.

[0027] The gas production concentration calculation unit is configured to calculate a methane concentration calculation value APV1 according to a formula APV1 = (FIC101_SV' × AW) / FIQ103_PV.

[0028] The determination unit is configured to determine whether the gas distribution is completed according to a preset rule; the preset rule includes determining whether a difference between the methane concentration calculation value and the current value of the methane concentration of the gas produced is less than a first preset value.

[0029] Preferably, in the present application, the preset rule further includes determining whether a difference between the methane concentration setting value of the gas produced and the current value of the methane concentration of the gas produced is less than a second preset value.

[0030] Preferably, in the present application, the preset rule further includes determining whether a difference between the current value of the gas production flow and the gas production flow basic value is less than a third preset value.

[0031] Preferably, in the present application, the low-concentration gas distribution control device further comprises:

[0032] The vent control unit is configured to close a gas production valve arranged in the gas production output pipe section and open a vent valve arranged in the gas production output pipe section when the result of the judgment on whether the gas distribution is completed is no, and close the vent valve and open the gas production valve when the result of the judgment on whether the gas distribution is completed is yes.

[0033] Preferably, in the present application, a flame arrester is further included in the gas production output pipe section.

[0034] Preferably, in the present application, an explosion suppression water spraying device is further included in the gas production output pipe section.

[0035] In another aspect of the embodiments of the present application, a low-concentration gas distribution control device is further provided, comprising:

[0036] A memory for storing a computer program;

[0037] A processor for calling and executing the computer program to realize each step of the low-concentration gas distribution control method according to any one of the above aspects.

[0038] In another aspect of the embodiments of the present application, a storage medium having a computer program stored thereon is further provided, and the computer program is executed by a processor to realize each step of the low-concentration gas distribution control method according to any one of the above aspects.

[0039] The low-concentration gas distribution control device includes a computer program stored in a medium, and the computer program includes program instructions which, when executed by a computer, cause the computer to perform the method according to any one of the above aspects and achieve the same technical effects.

[0040] Compared with the prior art, the present application has the following beneficial effects:

[0041] From the above scheme, the low-concentration gas gas distribution control method provided by the present application no longer simply adjusts the low-concentration gas inlet valve and the air inlet valve according to the concentration of the mixed gas obtained by the concentration sensor, but sets the target gas production flow (i.e. the gas production flow basic value) and the target gas production concentration (i.e. the methane concentration setting value) in advance, and then calculates the gas inlet valve opening value of the gas supply pipe section according to the current supply concentration of the low-concentration gas, so that the appropriate inlet flow of the low-concentration gas and the air mixing flow can be quickly determined according to the gas production demand. Since the present application can actively adjust the gas inlet flow and the air inlet flow when the concentration of the input low-concentration gas changes, the concentration fluctuation range of the gas production caused by the concentration fluctuation of the input low-concentration gas can be effectively reduced. In addition, the present application directly generates the control amount of the air mixing flow according to the fluctuation of the concentration of the input low-concentration gas, instead of passively adjusting when the concentration and flow of the mixed gas change, so that the adjustment accuracy and timeliness (time allocation accuracy) of the gas distribution adjustment can be effectively improved.

[0042] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application and can be implemented according to the content of the specification, at the same time, in order to make the above and other purposes, technical features and advantages of the present application more easily understood, one or more preferred embodiments are listed below, and the following detailed description is made with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed by the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0044] Figure 1 is a step diagram of the low-concentration gas gas distribution control method described in the present application;

[0045] Figure 2 is a structure schematic diagram of the low-concentration gas gas distribution control system described in the present application;

[0046] Figure 3 is another step diagram of the low-concentration gas gas distribution control method described in the present application;

[0047] Figure 4 is a structure schematic diagram of the low-concentration gas gas distribution control device described in the present application;

[0048] Figure 5 is a structure schematic diagram of the low-concentration gas gas distribution control equipment described in the present application. DETAILED DESCRIPTION

[0049] The specific embodiments of the present application will be described in detail below with reference to the drawings, but the scope of protection of the present application is not limited by the specific embodiments.

[0050] Unless otherwise clearly indicated, throughout the specification and claims, the terms "comprise", "comprising", "include", "including", "contain", "containing", or variations such as "comprises", "comprising", "includes", "including", "contains", "containing" or the like, shall not be understood to exclude other elements or components.

[0051] In this document, the terms "first", "second", etc. are used to distinguish two different elements or parts, and are not used to limit a specific position or relative relationship. In other words, in some embodiments, the terms "first", "second", etc. can also be interchanged with each other.

[0052] Example One

[0053] In order to effectively improve the regulation accuracy and timeliness of gas distribution regulation, as shown in the embodiment of the present application, a low-concentration gas distribution control method is provided, comprising the steps of: Figure 1

[0054] S11, setting the gas distribution flow basis value ASV1 (Nm3 / h) and the methane concentration setting value ASV2 (%) of the generated gas, and collecting the current supply concentration AW (%) of the low-concentration gas in real time;

[0055] The low-concentration gas distribution control method in the embodiment of the present application can be implemented in a specific low-concentration gas distribution control system, which includes physical working devices such as: Figure 2 Figure 4 The low-concentration gas distribution control method in the embodiment of the present application can be implemented in a specific low-concentration gas distribution control system, which includes physical working devices such as: Figure 4 The low-concentration gas distribution control method in the embodiment of the present application can be implemented in a specific low-concentration gas distribution control system, which includes physical working devices such as:

[0056] Low-concentration gas distribution control refers to adjusting and controlling the proportion of low-concentration gas and air when mixing low-concentration gas and air, so that the methane concentration of the mixed gas (i.e. generated gas) can meet the specific industrial application requirements. The embodiment of the present application takes the generated gas after mixing by the mixer as an example to supply the oxidation device for oxidation and heat release.

[0057] In practical application, the smaller the flow fluctuation and the methane concentration fluctuation of the generated gas after mixing by the mixer 31, the higher the utilization rate of the energy of the generated gas, and the higher the safety of production, which is also conducive to the normal operation of the downstream device (such as the oxidation device).

[0058] In order to reduce the flow fluctuation and the methane concentration fluctuation of the generated gas, the embodiment of the present application sets the supply amount of the generated gas to the oxidation device (i.e. the generated gas flow basic value) and the methane concentration of the supplied generated gas (i.e. the generated gas methane concentration setting value) in advance, and then calculates the corresponding air supply amount according to the two setting values and the current supply concentration of the low-concentration gas.

[0059] In the embodiment of the present application, the generated gas flow basic value (ASV1 (Nm3 / h)) refers to the flow of the generated gas output by the gas distribution system to the oxidation device, the generated gas methane concentration setting value (ASV2 (%)) refers to the target concentration of the generated gas required by the oxidation device, the current supply concentration (AW (%)) refers to the concentration of the low-concentration gas in the gas supply pipe section, and the supply flow setting value (FIC101_SV') refers to the target flow of the low-concentration gas in the gas supply pipe section (controlled by the gas inlet valve).

[0060] S12, according to the formula FIC101_SV' = ASV1 × ASV2 / AW, the supply flow setting value FIC101_SV' (Nm3 / h) of the low-concentration gas is calculated, and the gas inlet valve opening value of the gas supply pipe section connected with the mixer is determined according to the supply flow setting value;

[0061] According to the functional relationship between the gas concentration and the volume (the flow is taken as an indirect parameter equivalent to the volume in the embodiment of the present application), the embodiment of the present application sets the formula (formula 1) for calculating the supply flow setting value of the low-concentration gas entering the gas supply pipe section 11;

[0062] FIC101_SV' = ASV1 × ASV2 / AW, formula (1)

[0063] In formula (1), FIC101_SV' is the supply flow setting value of the low-concentration gas, with the unit of (Nm3 / h); ASV1 is the set generated gas flow basic value after gas distribution, with the unit of (Nm3 / h); ASV2 is the generated gas methane concentration setting value, with the unit of (%); and AW is the current supply concentration of the low-concentration gas, with the unit of (%).

[0064] Then, according to the corresponding relationship among the gas pressure, the gas flow and the valve opening, the opening value of the gas inlet valve 12 (i.e. the gas inlet valve opening value) is determined by the calculated supply flow setting value.

[0065] It should be noted that the step can be implemented at the initial gas distribution, or can be implemented when the fluctuation of the low concentration gas concentration of the inlet gas causes the gas concentration or flow to exceed the standard, to determine the appropriate opening value of the gas inlet valve 22.

[0066] S13, according to the formula FIC102_SV' = ASV1 × (AW - ASV2) / AW, calculate the air real-time demand flow FIC102_SV' (Nm3 / h) of the air mixed; and determine the air inlet valve opening value of the air supply pipe section connected with the mixer according to the air real-time demand flow.

[0067] On the basis of the appropriate opening value of the gas inlet valve, it is also necessary to further determine the air distribution amount; according to the functional relationship between the gas concentration and the volume, the embodiment of the present application also sets a formula (formula 2) for calculating the air real-time demand flow of the air mixed in the air supply pipe section 21.

[0068] FIC102_SV' = ASV1 × (AW - ASV2) / AW, (formula 2);

[0069] In formula (2), FIC102_SV' is the air real-time demand flow of the air mixed, and the unit is (Nm3 / h).

[0070] Then, further according to the corresponding relationship among the gas pressure, the gas flow and the valve opening, the opening value of the air inlet valve 22 (i.e. the air inlet valve opening value) is determined by the calculated air demand.

[0071] Through the above steps, according to the different current supply concentration of the low concentration gas, the opening value of the gas inlet valve 12 and the opening value of the air inlet valve 22 can be timely and pre-controlled before the fluctuation of the methane concentration of the gas output pipe section 41, so that the methane concentration after the gas distribution can be basically stable, and the gas flow can be basically stable.

[0072] In summary, the low-concentration gas distribution control method provided by the embodiment of the present application no longer simply adjusts the low-concentration gas inlet valve and the air inlet valve according to the concentration of the mixed gas obtained by the concentration sensor, but sets the target gas production flow (i.e., the gas production flow basic value) and the target gas production concentration (i.e., the methane concentration setting value) in advance, and then calculates the gas inlet valve opening value of the gas supply pipe section according to the current supply concentration of the low-concentration gas, so that the appropriate inlet flow of the low-concentration gas and the air mixing flow can be quickly determined according to the gas production demand. Since the embodiment of the present application can actively adjust the gas inlet flow and the air inlet flow when the methane concentration of the input low-concentration gas changes, the fluctuation range of the methane concentration of the gas production caused by the concentration fluctuation of the input low-concentration gas can be effectively reduced. In addition, the embodiment of the present application directly generates the control amount of the air mixing flow according to the concentration fluctuation of the input low-concentration gas, instead of passively adjusting when the concentration and flow of the mixed gas change, so that the adjustment accuracy and timeliness (time adjustment accuracy) of the gas distribution adjustment can be effectively improved.

[0073] Embodiment two

[0074] Based on the embodiment one, as shown in the low-concentration gas distribution control method in the embodiment of the present application can further include the following steps: Figure 3

[0075] S14, obtain the real-time collected monitoring information data; the monitoring information data includes the real-time collected methane concentration current value of the gas production after the gas distribution in the gas production output pipe section, and the gas production flow current value FIQ103_PV;

[0076] In order to improve the safety and stability of automatic gas distribution, the embodiment of the present application further includes a judgment step for the gas distribution completion degree, for which the corresponding monitoring information data is first obtained as the judgment basis.

[0077] The methane concentration current value of the gas production real-time collected in the gas production output pipe section 41 is the most intuitive result index of the methane concentration of the gas production (i.e., the methane concentration current value of the gas production), which can be obtained in real time by arranging the concentration sensor in the gas production output pipe section 41.

[0078] In addition, the monitoring information data further includes the flow value of the gas production real-time collected in the gas production output pipe section 41 (i.e., the gas production flow current value);

[0079] S15, the methane concentration (i.e., the methane concentration calculation value) in the gas production output pipe section 41 can also be calculated according to formula (3);

[0080] ​APV1 = (FIC101_SV' x AW) / FIQ103_PV, equation (3);

[0081] In equation (3), APV1 is the calculated value of methane concentration, with unit of (%); FIQ103_PV is the flow value of the produced gas (i.e., the current value of the produced gas flow) collected in real time at the produced gas output pipe section 41.

[0082] S16, judging whether the gas distribution is completed according to the preset rule; the preset rule includes judging whether the difference between the calculated value of methane concentration and the current value of the produced gas methane concentration is less than a first preset value.

[0083] When the gas distribution is completed, the calculated value of methane concentration should be basically consistent with the actually measured current value of the produced gas methane concentration, thus, whether the difference between the calculated value of methane concentration and the current value of the produced gas methane concentration is less than the first preset value can be taken as a main judging basis to judge whether the gas distribution is completed.

[0084] In actual application, the first preset value can be set by the person skilled in the art according to the actual situation and the floating precision of the produced gas concentration, which is not specifically limited here.

[0085] In addition, further, in the embodiment of the present application, the preset rule can further include 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.

[0086] In the embodiment of the present application, the set value of the produced gas methane concentration of the final produced gas is set at the beginning, which is suitable for the production demand of the oxidation device, in order to meet the safety production demand and the demand for good operation of the oxidation device, the embodiment of the present application can further judge whether the gas distribution is completed 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 the second preset value, to ensure that the methane concentration of the final produced gas can meet the safety production demand and the demand for good operation of the device.

[0087] In actual application, the second preset value can also be set by the person skilled in the art according to the actual situation and the floating precision of the produced gas concentration demand, which is not specifically limited here.

[0088] In addition, further, in the embodiment of the present application, the preset rule can further include judging whether the difference between the current value of the produced gas flow and the basic value of the produced gas flow is less than a third preset value. In this way, the stability of the produced gas flow and the meeting of the expectation are taken as another judging condition of whether the gas distribution is completed, thereby further increasing the safety in actual production process, and being more beneficial to the demand for good operation of the device.

[0089] In actual application, in order to ensure the safety of gas distribution, avoid the non-standard gas production to downstream equipment (such as oxidation device), the embodiment of the present application can further include the steps of:

[0090] When the judgment result of whether the gas distribution is completed is no, the gas valve 42 arranged in the gas output pipe section is closed and the vent valve 43 arranged in the gas output pipe section is opened; when the judgment result of whether the gas distribution is completed is yes, the vent valve 43 is closed and the gas valve 42 is opened.

[0091] In this way, according to the judgment result of whether the gas distribution is completed, the opening and closing of the vent valve 43 and the gas valve 42 are controlled correspondingly, so that the gas production is put into production after the gas distribution is completed, thereby ensuring the safety of the production process.

[0092] Preferably, in the embodiment of the present application, a gas return pipe section (not shown in the figure) can be arranged between the vent valve 43 and the gas inlet end of the gas inlet valve 12, so as to realize the recycling of the gas production which does not meet the requirements of the downstream device into the gas supply pipe section, thereby avoiding the waste of energy.

[0093] Embodiment three

[0094] Corresponding to the method embodiment, the low-concentration gas distribution control system including the low-concentration gas distribution control device is also provided in another aspect of the embodiment of the present application, Figure 4 The structure schematic diagram of the low-concentration gas distribution control device provided by the embodiment of the present application is shown, and the low-concentration gas distribution control device is a virtual device corresponding to the low-concentration gas distribution control method in the corresponding embodiment, Figure 1 Or Figure 3 The device corresponding to the low-concentration gas distribution control method in the corresponding embodiment, that is, the virtual device is realized by means of Figure 1 Or Figure 3 The low-concentration gas distribution control method in the corresponding embodiment, each virtual module constituting the low-concentration gas distribution control device can be executed by an electronic device, such as a network device, a terminal device, or a server.

[0095] Specifically, referring to Figures 1 to 3 The low-concentration gas distribution control system in the embodiment of the present application includes a gas supply pipe section 11, an air supply pipe section 21, a gas output pipe section 41, a mixer 31, and a low-concentration gas distribution control device as shown in Figure 1 Or Figure 3 The low-concentration gas distribution control device;

[0096] The gas supply pipe section 11 connected with the mixer 31 is provided with a gas inlet valve 12; the air supply pipe section 21 connected with the mixer 31 is provided with an air inlet valve 22; and the gas output pipe section 41 for connecting the mixer 31 and the oxidation device is provided with a gas valve 42;

[0097] The low-concentration gas distribution control device comprises:

[0098] A preset unit 01 is configured to set a gas distribution flow basis value ASV1 (Nm3 / h), a gas distribution methane concentration set value ASV2 (%), and obtain a current supply concentration AW (%) of the low-concentration gas collected in real time.

[0099] An air flow control unit 03 is configured to calculate an air real-time demand flow FIC102_SV' (Nm3 / h) of the mixed air according to a formula FIC102_SV' = ASV1 × (AW-ASV2) / AW, and determine an air inlet valve opening value of the air inlet valve 22 according to the air real-time demand flow.

[0100] An air flow control unit 03 is configured to calculate an air real-time demand flow FIC102_SV' (Nm3 / h) of the mixed air according to a formula FIC102_SV' = ASV1 × (AW-ASV2) / AW, and determine an air inlet valve opening value of the air inlet valve 22 according to the air real-time demand flow.

[0101] Further, in the embodiment of the present application, the low-concentration gas distribution control device can further comprise:

[0102] A monitoring information acquisition unit 04 is configured to obtain monitoring information data collected in real time; the monitoring information data comprises a current value of the gas distribution methane concentration and a current value of the gas flow FIQ103_PV collected in real time at the gas output pipe section 41.

[0103] A gas concentration calculation unit 05 is configured to calculate a methane concentration calculation value APV1 according to a formula APV1 = (FIC101_SV' × AW) / FIQ103_PV.

[0104] A determination unit 06 is configured to determine whether the gas distribution is completed according to a preset rule; the preset rule comprises determining whether a difference between the methane concentration calculation value and the current value of the gas distribution methane concentration is less than a first preset value.

[0105] Preferably, in the embodiment of the present application, the low-concentration gas distribution control device can further comprise:

[0106] A vent control unit (not shown in the figure) is configured to close a gas valve 42 arranged at the gas output pipe section 41 and open a vent valve 43 arranged at the gas output pipe section 41 when the determination result of whether the gas distribution is completed is no, and close the vent valve 43 and open the gas valve 42 when the determination result of whether the gas distribution is completed is yes.

[0107] In addition, in order to improve the safety of the gas distribution control process, the gas production output pipe section can be further provided with a flame arrester and / or explosion suppression water spraying device, so as to avoid the occurrence of dangerous accidents such as accidental combustion and explosion.

[0108] It should be noted that the specific implementation modes and technical effects of the low-concentration gas distribution control system and the low-concentration gas distribution control device in the embodiments of the present application can refer to the corresponding low-concentration gas distribution control method in the embodiments of the present application, which will not be repeated here. Figure 1 and Figure 3 The corresponding low-concentration gas distribution control method in the embodiments of the present application, which will not be repeated here.

[0109] Embodiment four

[0110] Corresponding to the method embodiment, the present embodiment also provides a low-concentration gas distribution control device, which is a terminal, a server, etc. The server can be a physical server, a server cluster or a distributed system composed of multiple physical servers, a cloud server providing cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDNs, and big data and artificial intelligence platforms, etc. Basic cloud computing services. The terminal can be a smart phone, a tablet computer, a notebook computer, a desktop computer, etc., but is not limited thereto.

[0111] The example diagram of the hardware structure block diagram of the low-concentration gas distribution control device provided by the embodiments of the present application is shown in Figure 5 As shown in the figure, it can include:

[0112] A processor 1, a communication interface 2, a memory 3 and a communication bus 4;

[0113] The processor 1, the communication interface 2, the memory 3 and the communication bus 4 can complete communication with each other through the communication bus 4;

[0114] Optionally, the communication interface 2 can be the interface of the communication module, such as the interface of the GSM module;

[0115] The processor 1 can be a central processing unit CPU, or a specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present application.

[0116] The memory 3 can include a high-speed RAM memory, and can also include a non-volatile memory, such as at least one disk memory.

[0117] The processor 1 is specifically configured to execute the computer program stored in the memory 3 to perform the following steps:

[0118] S11, set a gas production flow rate basis value ASV1 (Nm3 / h) after gas distribution, a gas production methane concentration setting value ASV2 (%), and a current supply concentration AW (%) of low-concentration gas collected in real time;

[0119] S12, calculate a supply flow rate setting value FIC101_SV' (Nm3 / h) of the low-concentration gas according to a formula FIC101_SV'=ASV1*ASV2 / AW, and determine a gas inlet valve opening value of a gas supply pipe section connected with the mixer according to the supply flow rate setting value;

[0120] S13, calculate an air real-time demand flow rate FIC102_SV' (Nm3 / h) of the air mixed with the low-concentration gas according to a formula FIC102_SV'=ASV1*(AW-ASV2) / AW, and determine an air inlet valve opening value of an air supply pipe section connected with the mixer according to the air real-time demand flow rate.

[0121] Preferably, the method further comprises:

[0122] S14, acquire monitoring information data collected in real time; the monitoring information data comprises a current value of the methane concentration of the gas after gas distribution and a current value of the gas flow rate FIQ103_PV collected in real time in the gas output pipe section;

[0123] S15, calculate a methane concentration calculation value APV1 according to a formula APV1=(FIC101_SV'*AW) / FIQ103_PV;

[0124] S16, determine whether the gas distribution is completed according to a preset rule; the preset rule comprises determining whether a difference between the methane concentration calculation value and the current value of the methane concentration of the gas is less than a first preset value.

[0125] The product can execute the method provided by the embodiment of the application, has the corresponding function modules and beneficial effects of the execution method. Technical details not described in detail in the embodiment can be referred to the low-concentration gas distribution control method provided by the embodiment of the application.

[0126] Embodiment five

[0127] In the embodiment of the application, a storage medium is also provided, which can store a program suitable for execution by a processor, and the program is used for:

[0128] S11, set a gas production flow rate basis value ASV1 (Nm3 / h) after gas distribution, a gas production methane concentration setting value ASV2 (%), and a current supply concentration AW (%) of low-concentration gas collected in real time;

[0129] S12, calculating a supply flow set value FIC101_SV' (Nm3 / h) of the low-concentration gas according to a formula FIC101_SV'=ASV1*ASV2 / AW, and determining a gas inlet valve opening value of a gas supply pipe section connected with the mixer according to the supply flow set value;

[0130] S13, calculating an air real-time demand flow FIC102_SV' (Nm3 / h) of the mixed air according to a formula FIC102_SV'=ASV1*(AW-ASV2) / AW, and determining an air inlet valve opening value of an air supply pipe section connected with the mixer according to the air real-time demand flow.

[0131] Preferably, the method can further comprise:

[0132] S14, acquiring real-time collected monitoring information data; the monitoring information data comprises a current value of the methane concentration of the produced gas after the gas distribution, and a current value of the produced gas flow FIQ103_PV;

[0133] S15, calculating a methane concentration calculation value APV1 according to a formula APV1=(FIC101_SV'*AW) / FIQ103_PV;

[0134] S16, judging whether the gas distribution is completed according to a preset rule; the preset rule comprises judging whether a difference between the methane concentration calculation value and the current value of the methane concentration of the produced gas is less than a first preset value.

[0135] Optionally, the refinement function and the expansion function of the program can refer to the description above.

[0136] The product described above can execute the method provided by the embodiments of the application, and has the corresponding function modules and beneficial effects of the execution method. Technical details not described in the embodiments can refer to the method provided by other embodiments of the application.

[0137] Those skilled in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solutions. Those skilled in the art can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the application.

[0138] In several embodiments provided by the present application, it should be understood that the disclosed system, device and method can be implemented in other manners. Further, the displayed or discussed mutual couplings or direct couplings or communication connections can be implemented in other manners, or can be implemented in electrically, mechanically or in other forms.

[0139] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e. may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0140] In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0141] It should be understood that the features in the embodiments of the present application can be combined with each other, and all can achieve the purpose of solving the above technical problems.

[0142] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of software product, and the computer software product is stored in a storage medium, including a plurality of instructions for making a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in the embodiments of the present application. The foregoing storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other various storage program codes.

[0143] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling low-concentration methane gas distribution, characterized in that, Including the following steps: S11. Set the basic value of the gas production flow rate after gas mixing as ASV1 (Nm³). 3 / h) and the setpoint for the methane concentration produced, ASV2 (%), and the current supply concentration of low-concentration methane, AW (%), are collected in real time. S12. Calculate the supply flow setpoint FIC101_SV' (Nm³) for low-concentration methane using the formula FIC101_SV' = ASV1 × ASV2 / AW. 3 / h); and determine the gas inlet valve opening value of the gas supply pipe section connected to the mixer according to the supply flow rate setting value; S13. Calculate the real-time air demand flow rate FIC102_SV' (Nm³) for the incorporated 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 pipe section connected to the mixer based on the real-time air demand flow rate; 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 pipe section. S15. The calculated methane concentration APV1 is obtained by using the formula APV1 = (FIC101_SV' × AW) / FIQ103_PV; S16. 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 low-concentration methane gas distribution control method 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 low-concentration gas distribution control method 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 low-concentration gas distribution control method according to any one of claims 1 to 3, characterized in that, Also includes: If the determination result of whether gas distribution is completed is yes, close the vent valve of the gas output pipe section and open the gas output valve of the gas output pipe section; otherwise, close the gas output valve of the gas output pipe section and open the vent valve of the gas output pipe section.

5. A low-concentration gas distribution control system, characterized in that, This includes a gas supply pipeline section, an air supply pipeline section, a gas production and output pipeline section, a mixer, and a low-concentration gas distribution control device. The gas supply pipe section connected to the mixer is equipped with a gas inlet valve; the air supply pipe section connected to the mixer is equipped with an air inlet valve; the gas output pipe section used to connect the mixer and the oxidation device is equipped with a gas production valve; The low-concentration methane gas distribution control device includes: The preset unit is used to set the basic value of the gas production flow rate ASV1 (Nm³) after gas distribution. 3 / h) and the setpoint for the methane concentration produced, ASV2 (%), and the current supply concentration of low-concentration methane collected in real time, AW (%). The intake flow control unit is used to calculate the supply flow setpoint FIC101_SV' (Nm³) for low-concentration methane based on the formula FIC101_SV' = ASV1×ASV2 / AW. 3 / h); and determine the gas intake valve opening value of the gas intake valve according to the supply flow rate setting value; The air flow control unit is used to calculate the real-time air demand flow rate FIC102_SV' (Nm³) for 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 intake valve 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 in the gas production output pipe section, and the current value of the gas production flow rate FIQ103_PV. 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 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.

6. The low-concentration gas distribution control system 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 low-concentration gas distribution control system 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 low-concentration gas distribution control system 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 of the gas output pipe section and open the gas generation valve of the gas output pipe section when the judgment result of whether the gas distribution is completed is yes; otherwise, it closes the gas generation valve of the gas output pipe section and opens the vent valve of the gas output pipe section.

9. The low-concentration gas distribution control system according to claim 5, characterized in that, The gas output pipe section also includes a flame arrester.

10. The low-concentration gas distribution control system according to claim 5, characterized in that, The gas output pipe section also includes an explosion suppression water spray device.

11. The low-concentration gas distribution control system according to claim 8, characterized in that, Also includes: A return pipe section used to connect the vent valve and the gas inlet valve at their inlet ends.

12. A low-concentration gas distribution control device, characterized in that, include: Memory, used to store computer programs; A processor is configured to invoke and execute the computer program to implement the steps of the low-concentration gas distribution control method 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 low-concentration gas distribution control method as described in any one of claims 1 to 4.

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