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

Abstract

The application discloses a low-concentration gas rapid gas distribution method, system, equipment and storage medium, and comprises the following steps: presetting a first corresponding relationship, a gas production flow basic value and a methane concentration setting value; collecting a current supply concentration and a pipeline pressure value of the low-concentration gas in real time; calculating a supply flow setting value of the low-concentration gas according to a formula; determining a gas inlet valve opening value of a gas supply pipeline according to the supply flow setting value and the first corresponding relationship; calculating an air real-time demand flow of air mixing according to a formula; and determining an air inlet valve opening value of an air supply pipeline connected with a mixer according to the air real-time demand flow. According to the fluctuation of the concentration of the input low-concentration gas, the application directly generates a 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 rapid gas distribution method, device, equipment and storage medium. BACKGROUND

[0002] At present, low-concentration gas with a concentration of less than 30% pumped by a gas pump 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 that can be utilized 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 gas obtained by the concentration sensor.

[0004] The inventor finds that the control of the mixing ratio of the low-concentration gas and the air in the prior art has the defects of poor adjustment accuracy and timeliness (time distribution accuracy), and cannot timely adjust the gas production according to the fuel demand of the oxidation device such as the heating furnace, thereby being not conducive to the normal operation of the heating furnace.

[0005] The information disclosed in this part of the background is only intended to increase the understanding of the overall background of the present application, and should not be regarded as acknowledging or implying in any form that the information constitutes prior art known to those skilled in the art. 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 application, the present application provides a low-concentration gas rapid gas distribution method, comprising the steps of:

[0008] S11, presetting a first correspondence relationship between a gas inlet valve opening value and a low-concentration gas flow when a preset pipeline pressure value in a gas supply pipeline connected with a mixer, and a basic gas production flow value ASV1 (Nm3 / h) and a methane concentration setting value ASV2 (%) after gas distribution;

[0009] S12, real-time acquisition of a current supply concentration AW (%) of the low-concentration gas, and a pipeline pressure value of the gas supply pipeline;

[0010] S13, 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 the gas intake valve opening value according to the supply flow set value and the first corresponding relationship;

[0011] S14, 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 intake valve opening value of an air supply pipeline connected with the mixer according to the air real-time demand flow.

[0012] Preferably, in the present application, further comprising:

[0013] S15, acquiring real-time monitoring information data; the monitoring information data includes a current value of the methane concentration of the produced gas after gas distribution in the produced gas output pipeline, and a current value of the produced gas flow FIQ103_PV;

[0014] S16, calculating a methane concentration calculation value APV1 according to a formula APV1=(FIC101_SV'*AW) / FIQ103_PV;

[0015] S17, judging whether the gas distribution is completed according to a preset rule; the preset rule includes 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.

[0016] Preferably, in the present application, the preset rule further includes judging whether a 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.

[0017] Preferably, in the present application, the preset rule further includes judging whether a 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.

[0018] Preferably, in the present application, further comprising:

[0019] a second corresponding relationship between an air intake valve opening value and an air flow when a preset pipeline pressure value in an air supply pipeline connected with the mixer is preset;

[0020] The air intake valve opening value of the air supply pipeline connected with the mixer according to the air real-time demand flow includes determining the air intake valve opening value according to the air real-time demand flow and the second corresponding relationship.

[0021] Preferably, in the present application, the first correspondence relationship comprises: setting the low-concentration gas flow to a preset number of gears, and determining the gas intake valve opening value corresponding to each gear respectively;

[0022] The second correspondence relationship comprises: setting the air flow to a preset number of gears, and determining the air intake valve opening value corresponding to each gear respectively.

[0023] Preferably, in the present application, it further comprises:

[0024] When the judgment result of judging whether the gas distribution is completed is yes, the vent valve is closed and the gas production valve is opened, otherwise the gas production valve arranged in the gas production output pipeline is closed and the vent valve arranged in the gas production output pipeline is opened.

[0025] In another aspect of the present application, a low-concentration gas rapid gas distribution system is also provided, comprising a gas supply pipeline, an air supply pipeline, a gas production output pipeline, a mixer, and a low-concentration gas rapid gas distribution device;

[0026] The gas supply pipeline connected with the mixer is provided with a gas intake valve; the air supply pipeline connected with the mixer is provided with an air intake valve; and the gas production output pipeline for connecting the mixer and the oxidation device is provided with a gas production valve;

[0027] The low-concentration gas rapid gas distribution device comprises:

[0028] A preset unit is configured to preset a first correspondence relationship between a gas intake valve opening value and a low-concentration gas flow when a preset pipeline pressure value in the gas supply pipeline, and a basis value ASV1 (Nm3 / h) of a gas production flow after gas distribution and a methane concentration setting value ASV2 (%) of the gas production;

[0029] A real-time data acquisition unit is configured to acquire a current supply concentration AW (%) of the low-concentration gas and a pipeline pressure value of the gas supply pipeline in real time;

[0030] A first calculation 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 the gas intake valve opening value according to the supply flow setting value and the first correspondence relationship;

[0031] A second calculation 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 the air intake valve opening value according to the air real-time demand flow.

[0032] Preferably, in the present application, the low-concentration gas rapid gas distribution device further comprises:

[0033] A monitoring information acquisition unit is configured to acquire real-time monitoring information data, wherein the monitoring information data comprises a current value of a methane concentration of the produced gas after real-time gas distribution in the gas output pipeline and a current value of a gas flow rate FIQ103_PV;

[0034] A produced gas concentration calculation unit is configured to calculate a methane concentration calculation value APV1 according to a formula APV1=(FIC101_SV'×AW) / FIQ103_PV.

[0035] A determination unit is configured to determine whether the gas distribution is qualified according to a preset rule, wherein the preset rule comprises determining 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.

[0036] Preferably, in the present application, the preset rule further comprises determining whether a 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.

[0037] Preferably, in the present application, the preset rule further comprises determining whether a difference between the current value of the gas flow rate and a basic value of the gas flow rate is less than a third preset value.

[0038] Preferably, in the present application, the low-concentration gas rapid gas distribution device further comprises:

[0039] A second corresponding relationship between an air intake valve opening degree value and an air flow rate when a preset pipeline pressure value in an air supply pipeline connected with the mixer is preset.

[0040] The air intake valve opening degree value of the air supply pipeline connected with the mixer is determined according to the real-time demand flow rate of the air, and the second corresponding relationship comprises determining the air intake valve opening degree value according to the real-time demand flow rate of the air and the second corresponding relationship.

[0041] Preferably, in the present application, the first corresponding relationship comprises setting the low-concentration gas flow rate as a preset number of gears and determining a gas intake valve opening degree value corresponding to each gear.

[0042] The second corresponding relationship comprises setting the air flow rate as a preset number of gears and determining an air intake valve opening degree value corresponding to each gear.

[0043] Preferably, in the present application, the low-concentration gas rapid gas distribution device further comprises:

[0044] The vent control unit is configured to close the vent valve and open the gas production valve when the determination result of whether the gas distribution meets the standard is yes, and otherwise, close the gas production valve arranged on the gas production output pipeline and open the vent valve arranged on the gas production output pipeline.

[0045] In another aspect of the embodiments of the present application, a low-concentration gas rapid distribution device is also provided, comprising:

[0046] a memory for storing a computer program;

[0047] a processor for calling and executing the computer program to implement the steps of the low-concentration gas rapid distribution method according to any one of the above aspects.

[0048] In another aspect of the embodiments of the present application, a storage medium having a computer program stored thereon is also provided, and the computer program is executed by a processor to implement the steps of the low-concentration gas rapid distribution method according to any one of the above aspects.

[0049] The low-concentration gas rapid distribution device comprises a computer program stored on a medium, and the computer program comprises program instructions, which, when executed by a computer, cause the computer to execute the method according to any one of the above aspects and achieve the same technical effects.

[0050] Compared with the prior art, the present application has the following beneficial effects:

[0051] As can be seen from the above scheme, the low-concentration gas rapid distribution 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 a target gas production flow (i.e., a gas production flow basic value) and a target gas production concentration (i.e., a methane concentration set value) in advance, and then calculates the gas inlet valve opening value of the gas supply pipeline according to the current supply concentration of the low-concentration gas and the preset corresponding relationship (i.e., a first corresponding relationship between the valve opening value and the gas flow in the pipeline), so that the appropriate inlet flow of the low-concentration gas and the air incorporation flow can be quickly determined according to the gas production demand. Since the present application can actively pre-adjust the gas inlet flow and the air inlet flow when the concentration of the input low-concentration gas fluctuates, the concentration fluctuation range of the produced gas 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 incorporation flow according to the fluctuation of the concentration of the input low-concentration gas, rather than 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.

[0052] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clearly understood and implemented according to the content of the description, and 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 described in detail in conjunction with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0053] In order to more clearly illustrate the technical solutions of the present application, the drawings required for the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0054] Figure 1 is a step diagram of the low-concentration gas rapid gas distribution method described in the present application;

[0055] Figure 2 is a structural schematic diagram of the low-concentration gas rapid gas distribution system described in the present application;

[0056] Figure 3 is another step diagram of the low-concentration gas rapid gas distribution method described in the present application;

[0057] Figure 4 is a structural schematic diagram of the low-concentration gas rapid gas distribution device described in the present application;

[0058] Figure 5 is a structural schematic diagram of the low-concentration gas rapid gas distribution equipment described in the present application. DETAILED DESCRIPTION

[0059] The specific embodiments of the present application will be described in detail below with reference to the drawings, but it should be understood that the protection scope of the present application is not limited by the specific embodiments.

[0060] Unless otherwise explicitly stated, throughout the specification and claims, the term "comprise" or its variants such as "comprises" or "comprising" will be understood to include the stated element or component, but not to exclude other elements or components.

[0061] In this document, the terms "first", "second", and the like are used to distinguish two different elements or parts, and are not used to define a specific position or relative relationship. In other words, in some embodiments, the terms "first", "second", and the like can be interchanged with each other.

[0062] Example 1

[0063] In order to effectively improve the adjustment accuracy and timeliness of gas distribution adjustment, such as Figure 1As shown, in the embodiment of the present application, a low-concentration gas rapid gas distribution method is provided, comprising the steps of:

[0064] S11, preset the first correspondence relationship between the gas inlet valve opening value and the low-concentration gas flow when the preset pipeline pressure value in the gas supply pipeline connected with the mixer, and the gas production flow basic value ASV1 (Nm3 / h) and the gas production methane concentration set value ASV2 (%);

[0065] The low-concentration gas rapid gas distribution method in the embodiment of the present application can be realized in a specific low-concentration gas rapid gas distribution system, such as Figure 2 As shown, in the low-concentration gas rapid gas distribution system, it comprises the physical working equipment as shown in Figure 2 The gas supply pipeline 11, the air supply pipeline 21, the gas output pipeline 41, the mixer 31, and the computing processing equipment as shown in Figure 4 The low-concentration gas rapid gas distribution device; wherein the low-concentration gas rapid gas distribution device as a device with data processing function can work with the automatic control device of valve control to implement the low-concentration gas distribution control method in the embodiment of the present application, and control the valves in each pipeline to realize the control of the gas flow in each pipeline, and then achieve the purpose of gas distribution regulation.

[0066] The low-concentration gas rapid gas distribution refers to the mixing of low-concentration gas and air, by adjusting and controlling the proportion of low-concentration gas and air, so that the methane concentration of the mixed gas (i.e. the production gas) can meet the specific industrial application requirements, and the embodiment of the present application takes the production gas generated after mixing by the mixer to supply the oxidation device for example.

[0067] In actual application, the smaller the flow fluctuation and the methane concentration fluctuation of the production gas generated after mixing by the mixer 31, the higher the utilization rate of the energy of the production gas, and the higher the safety of production, which is also beneficial to the normal operation of the downstream device (such as the heating furnace and other oxidation devices).

[0068] In order to reduce the fluctuation of the flow and the methane concentration of the production gas, the embodiment of the present application presets the supply amount of the production gas to the oxidation device (i.e. the production gas flow basic value), and the methane concentration of the supplied production gas (i.e. the production gas methane concentration set value); then the corresponding air supply amount can be calculated according to the two set amounts and the current supply concentration of the low-concentration gas.

[0069] In addition, in order to further improve the response speed, the application further presets a first corresponding relationship between the gas inlet valve opening value and the low-concentration gas flow when the preset pipeline pressure value in the gas supply pipeline 11; specifically, in the actual production environment, the pressure of the collected low-concentration gas reaching the gas distribution system is generally basically stable, and the concentration may fluctuate; only by controlling the flow in the gas supply pipeline 11 can the final gas production concentration and flow be kept stable, in order to quickly control the flow in the gas supply pipeline 11 through valve control, the application further presets a corresponding relationship between the gas inlet valve opening value and the low-concentration gas flow (i.e., the first corresponding relationship); in this way, after obtaining the required flow of the low-concentration gas, the corresponding opening value of the gas inlet valve 12 can be quickly determined, and the response speed of the control is further improved.

[0070] For similar purposes, in the application, a corresponding relationship between the air inlet valve opening value and the air flow (i.e., the second corresponding relationship) can also be preset; in this way, after obtaining the required flow of the air, the corresponding opening value of the air inlet valve 22 can be quickly determined, and the response speed of the control is further improved.

[0071] In actual application, the first corresponding relationship and the second corresponding relationship can be obtained in the following manner: under a specific pipeline pressure value (such as the conventional pipeline pressure when the gas supply pipeline 11 is working, and the conventional pipeline pressure when the air supply pipeline 21 is working), a plurality of flow positions can be set, and then the opening value of the valve corresponding to each position is obtained through experiments.

[0072] In a specific example, the first corresponding relationship can be as follows:

[0073] The working pressure of the gas supply pipeline 11 is: the pressure before the valve: 0.2 MPa; the pressure after the valve: 0.19 MPa; the parameters and working conditions of the gas inlet valve 12 are: the valve type: CV-3000 regulating valve, product type: TCB; flow characteristic: percentage; pressure rating: ANSI 150; flange form: RF; pressure recovery coefficient: 0.9; valve body diameter DN80; valve seat diameter DN80; valve body, valve core, valve seat material: 316L; packing: graphite; upper cover type: normal temperature type; action form: air opening.

[0074] The first corresponding relationship obtained is shown in the following table:

[0075] Flow rate m 3 / h]] Valve opening % Flow rate m 3 / h]] Valve opening % Flow rate m 3 / h]] Valve opening % 40 27.1 130 57.23 220 70.68 50 32.8 140 59.12 230 97.81 60 37.47 150 60.89 240 72.9 70 41.41 160 62.54 250 73.95 80 44.82 170 64.09 260 74.95 90 47.83 180 65.55 270 75.91 100 50.52 190 66.93 280 76.84 110 52.96 200 68.24 290 77.74 120 55.18 210 69.49 300 78.61

[0076] It should be noted that the first corresponding relationship and the second corresponding relationship in the application can also include a plurality of corresponding relationships corresponding to different pipeline pressures, i.e., a plurality of corresponding corresponding relationships are generated according to different pipeline pressures.

[0077] S12, collecting the current supply concentration AW(%) of the low-concentration gas in real time, and collecting the pipeline pressure value of the gas supply pipeline;

[0078] In actual production, the concentration of the low-concentration gas can change, and therefore corresponding valve control is required to ensure the stability of the concentration and flow rate of the produced gas; therefore, the current supply concentration of the low-concentration gas is collected in real time.

[0079] On the other hand, the first corresponding relationship in the embodiment of the present application is the corresponding relationship between the flow rate and the valve opening value at a specific pipeline pressure, and therefore the pipeline pressure value of the gas supply pipeline 11 is determined, so that the effectiveness of the first corresponding relationship is determined, or when the first corresponding relationship includes the corresponding relationship between the low-concentration gas flow rate and the gas inlet valve opening value at multiple pipeline pressures, the matching of the corresponding relationship is determined.

[0080] S13, calculating the supply flow rate set value FIC101_SV'(Nm3 / h) of the low-concentration gas according to the formula FIC101_SV'=ASV1×ASV2 / AW, and determining the gas inlet valve opening value according to the supply flow rate set value and the first corresponding relationship;

[0081] According to the functional relationship between the gas concentration and the volume (the embodiment of the present application takes the flow rate as an indirect parameter equivalent to the volume), the embodiment of the present application sets a formula (formula 1) for calculating the supply flow rate set value of the low-concentration gas entering the gas supply pipeline 11;

[0082] FIC101_SV'=ASV1×ASV2 / AW, formula (1)

[0083] In formula (1), FIC101_SV' is the supply flow rate set value of the low-concentration gas, with the unit of (Nm3 / h); ASV1 is the set basis value of the gas distribution flow rate, with the unit of (Nm3 / h); ASV2 is the set value of the methane concentration of the produced gas, with the unit of (%); and AW is the current supply concentration of the low-concentration gas collected in real time, with the unit of (%).

[0084] Then, according to the corresponding relationship between the gas flow rate and the valve opening (i.e., the first corresponding relationship), the opening value of the gas inlet valve 12 (i.e., the gas inlet valve opening value) is determined by the calculated supply flow rate set value.

[0085] In the embodiment of the present application, the gas production flow rate basic value (ASV1 (Nm3 / h)) refers to the flow rate of the gas output by the gas distribution system to the oxidation device; the gas production methane concentration set value (ASV2 (%)) refers to the target concentration of the gas required by the oxidation device; the current supply concentration (AW (%)) refers to the concentration of the 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 the low-concentration gas in the gas supply pipeline 11 (controlled by the gas inlet valve 12).

[0086] It should be noted that this 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 production concentration or flow rate to exceed the standard, to determine the appropriate opening value of the gas inlet valve 12.

[0087] S14, according to the formula FIC102_SV' = ASV1 × (AW - ASV2) / AW, calculating the air real-time demand flow rate FIC102_SV' (Nm3 / h) of the air to be mixed; and determining the air inlet valve opening value of the air supply pipeline connected with the mixer according to the air real-time demand flow rate.

[0088] On the basis of the gas inlet valve 12 being at the appropriate opening value, it is further necessary to determine the air distribution amount; according to the functional relationship between the gas concentration and the volume, the embodiment of the present application further sets a formula (Formula 2) for calculating the air real-time demand flow rate of the air to be mixed in the air supply pipeline 21;

[0089] FIC102_SV' = ASV1 × (AW - ASV2) / AW, (Formula 2);

[0090] In the formula (2), FIC102_SV' is the air real-time demand flow rate of the air to be mixed, with the unit of (Nm3 / h).

[0091] Then, further according to the corresponding relationship between the gas flow rate and the valve opening (such as the second corresponding relationship), the opening value of the air inlet valve 22 (i.e. the air inlet valve opening value) is determined by the calculated air demand.

[0092] Through the above steps, according to the different current supply concentrations 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 production, so that the methane concentration after the gas distribution can be kept basically stable, and the gas production flow rate can be basically stable.

[0093] In summary, the low-concentration gas rapid gas distribution 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 pipeline according to the current supply concentration of the low-concentration gas and the preset corresponding relationship (i.e., the first corresponding relationship, the corresponding relationship between the valve opening value and the gas flow in the pipeline), so that the appropriate inlet flow of the low-concentration gas and the air incorporation 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 incorporation 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.

[0094] Embodiment two

[0095] Based on the embodiment one, as shown in the low-concentration gas rapid gas distribution method in the embodiment of the present application can further include the following steps: Figure 3

[0096] S15, obtaining the real-time collected monitoring information data; the monitoring information data includes the real-time collected methane concentration current value of the gas production in the gas production output pipeline and the gas flow current value FIQ103_PV;

[0097] In order to improve the safety and stability of the automatic gas distribution, the embodiment of the present application further includes a judgment step for the gas distribution completion degree. For this purpose, the corresponding monitoring information data is first obtained as the judgment basis.

[0098] The methane concentration current value of the gas production in the gas production output pipeline 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). The methane concentration value (i.e., the methane concentration current value of the gas production) of the gas production can be obtained in real time by arranging the concentration sensor in the gas production output pipeline 41.

[0099] In addition, the monitoring information data further includes the flow value (i.e., the gas flow current value) of the gas production collected in real time in the gas production output pipeline 41.

[0100] S16, the methane concentration (i.e., the methane concentration calculation value) in the gas production output pipeline 41 can also be calculated according to formula (3).​

[0101] APV1 = (FIC101_SV' x AW) / FIQ103_PV, equation (3);

[0102] 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 pipeline 41.

[0103] S17, 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.

[0104] When the gas distribution is completed, the calculated value of methane concentration should be substantially consistent with the actually measured current value of the produced gas methane concentration, and 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 used as a main judging basis to judge whether the gas distribution is completed.

[0105] 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, and is not specifically limited here.

[0106] 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.

[0107] 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 requirement of the oxidation device, and in order to meet the safety production requirement and the requirement of good operation of the 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, so as to ensure that the methane concentration of the final produced gas can meet the safety production requirement and the requirement of good operation of the device.

[0108] 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 requirement, and is not specifically limited here.

[0109] 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 used as another judging condition of whether the gas distribution is completed, so as to further increase the safety in the actual production process and be more beneficial to the requirement of good operation of the device.

[0110] In actual application, in order to ensure the safety of gas distribution, avoid the non-standard gas production to downstream equipment (such as heating furnace and other oxidation devices), the embodiment of the present application can also include the following steps:

[0111] When the result of judging whether the gas distribution is completed is no, the gas valve 42 arranged in the gas output pipeline 41 is closed and the vent valve 43 arranged in the gas output pipeline 41 is opened; when the result of judging whether the gas distribution is completed is yes, the vent valve 43 is closed and the gas valve 42 is opened.

[0112] In this way, according to the result of judging 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 completion of the gas distribution, thereby ensuring the safety of the production process.

[0113] Preferably, in the embodiment of the present application, a gas return pipeline 51 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 pipeline 11, thereby avoiding the waste of energy.

[0114] Embodiment three

[0115] Corresponding to the method embodiment, the embodiment of the present application also provides a low-concentration gas rapid distribution system comprising a low-concentration gas rapid distribution device, Figure 4 The structure schematic diagram of the low-concentration gas rapid distribution device provided by the embodiment of the present application is shown, and the low-concentration gas rapid distribution device is a virtual device corresponding to the low-concentration gas rapid distribution method in the embodiment of the present application, Figure 1 Or Figure 3 The device corresponding to the low-concentration gas rapid distribution method in the corresponding embodiment, that is, the virtual device is realized by means of Figure 1 Or Figure 3 The low-concentration gas rapid distribution method in the corresponding embodiment, each virtual module constituting the low-concentration gas rapid distribution device can be executed by an electronic device, such as a network device, a terminal device, or a server.

[0116] Specifically, referring to Figure 2 The low-concentration gas rapid distribution system in the embodiment of the present application comprises a gas supply pipeline 11, an air supply pipeline 21, a gas output pipeline 41, a mixer 31, and a low-concentration gas rapid distribution device.

[0117] The gas supply pipeline 11 connected with the mixer 31 is provided with a gas inlet valve 12; the air supply pipeline 21 connected with the mixer 31 is provided with an air inlet valve 22; and the gas output pipeline 41 for connecting the mixer 31 and an oxidation device is provided with a gas valve 42.

[0118] The low-concentration gas rapid distribution device comprises:

[0119] The preset unit 01 is configured to preset a first corresponding relationship between a gas intake valve opening value and a low-concentration gas flow when a preset pipeline pressure value in a gas supply pipeline, and set a gas production flow basis value ASV1 (Nm3 / h) and a gas production methane concentration set value ASV2 (%);

[0120] The real-time data acquisition unit 02 is configured to acquire a current supply concentration AW (%) of the low-concentration gas and a pipeline pressure value of the gas supply pipeline in real time.

[0121] The first calculation unit 03 is configured to calculate a supply flow set value FIC101_SV' (Nm3 / h) of the low-concentration gas according to a formula FIC101_SV' = ASV1 × ASV2 / AW, and determine the gas intake valve opening value according to the supply flow set value and the first corresponding relationship.

[0122] The second calculation unit 04 is configured to calculate an air real-time demand flow FIC102_SV' (Nm3 / h) of the air mixed in according to a formula FIC102_SV' = ASV1 × (AW-ASV2) / AW, and determine the air intake valve opening value according to the air real-time demand flow.

[0123] Further, in the embodiment of the present application, the low-concentration gas rapid gas blending device can further comprise:

[0124] The monitoring information acquisition unit 04 is configured to acquire monitoring information data acquired in real time; the monitoring information data comprises a current value of the gas production methane concentration after gas blending acquired in real time in the gas production output pipeline, and a current value of the gas production flow FIQ103_PV.

[0125] The gas production concentration calculation unit 05 is configured to calculate a methane concentration calculation value APV1 according to a formula APV1 = (FIC101_SV' × AW) / FIQ103_PV.

[0126] The determination unit 06 is configured to determine whether the gas blending 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 production methane concentration is less than a first preset value.

[0127] Preferably, in the embodiment of the present application, the low-concentration gas rapid gas blending device can further comprise:

[0128] The vent control unit (not shown in the figure) is configured to close a gas production valve 42 arranged in the gas production output pipeline 41 and open a vent valve 43 arranged in the gas production output pipeline 41 when the determination result of whether the gas blending is completed is no, and close the vent valve 43 and open the gas production valve 42 when the determination result of whether the gas blending is completed is yes.

[0129] Preferably, in the embodiment of the present application, a gas return pipeline 51 can be arranged between the vent valve and the gas inlet end of the gas inlet valve 12 of the gas supply pipeline 11, so as to recycle the gas produced which does not meet the requirements of the downstream device into the gas supply pipeline 11, thereby avoiding waste of energy.

[0130] In addition, in order to improve the safety of the gas distribution control process, in the embodiment of the present application, a flame arrester and / or explosion suppression water spraying device can be arranged in the gas production output pipeline 41, so as to avoid the occurrence of dangerous accidents such as accidental combustion and explosion.

[0131] It should be noted that the specific implementation modes and technical effects of the low-concentration gas rapid distribution system and the low-concentration gas rapid distribution device in the embodiment of the present application can refer to the corresponding low-concentration gas rapid distribution method in Figure 1 and Figure 3 Therefore, details are not repeated here.

[0132] Embodiment Four

[0133] Corresponding to the method embodiment, the embodiment of the present application also provides a low-concentration gas rapid distribution device, which can be a terminal, a server, etc. The server can be a stand-alone physical server, a server cluster or a distributed system composed of multiple physical servers, or 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 basic cloud computing services such as big data and artificial intelligence platforms. The terminal can be a smart phone, a tablet computer, a notebook computer, a desktop computer, etc., but is not limited thereto.

[0134] An example diagram of a hardware structure block diagram of the low-concentration gas rapid distribution device provided by the embodiments of the present application is shown in Figure 5 As shown in the figure, the low-concentration gas rapid distribution device can include:

[0135] a processor 1, a communication interface 2, a memory 3, and a communication bus 4;

[0136] The processor 1, the communication interface 2, and the memory 3 can communicate with each other through the communication bus 4;

[0137] Optionally, the communication interface 2 can be an interface of a communication module, such as an interface of a GSM module.

[0138] 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.

[0139] The memory 3 can comprise a high-speed RAM memory and can also comprise a non-volatile memory, such as at least one disk memory.

[0140] The processor 1 is specifically configured to execute the computer program stored in the memory 3 to perform the following steps:

[0141] S11, a first correspondence relationship between a preset pipeline pressure value in a gas supply pipeline connected with the mixer and a gas inlet valve opening degree value and a low-concentration gas flow, and a gas production flow basic value ASV1 (Nm3 / h) and a gas production methane concentration setting value ASV2 (%) after gas distribution;

[0142] S12, real-time collection of a current supply concentration AW (%) of the low-concentration gas and a pipeline pressure value of the gas supply pipeline;

[0143] S13, calculation of a supply flow setting value FIC101_SV' (Nm3 / h) of the low-concentration gas according to a formula FIC101_SV' = ASV1 x ASV2 / AW, and determination of the gas inlet valve opening degree value according to the supply flow setting value and the first correspondence relationship;

[0144] S14, calculation of an air real-time demand flow FIC102_SV' (Nm3 / h) of the air mixed into the low-concentration gas according to a formula FIC102_SV' = ASV1 x (AW-ASV2) / AW, and determination of an air inlet valve opening degree value of an air supply pipeline connected with the mixer according to the air real-time demand flow.

[0145] Preferably, the method can further comprise:

[0146] S15, acquisition of real-time collected monitoring information data; the monitoring information data comprises a current value of the gas production methane concentration after gas distribution and a current value of the gas production flow FIQ103_PV collected in real time in the gas production output pipeline;

[0147] S16, calculation of a methane concentration calculation value APV1 according to a formula APV1 = (FIC101_SV' x AW) / FIQ103_PV;

[0148] S17, judgment of whether the gas distribution is completed according to a preset rule; the preset rule comprises judgment of whether a difference between the methane concentration calculation value and the current value of the gas production methane concentration is less than a first preset value.

[0149] 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 rapid gas distribution method provided by the embodiment of the application.

[0150] Embodiment five

[0151] In the embodiments of the present application, a storage medium is also provided, which can store a program suitable for a processor to execute, and the program is used for:

[0152] S11, preset a first correspondence relationship between a gas inlet valve opening degree value and a low-concentration gas flow when a preset pipeline pressure value in a gas supply pipeline connected with a mixer, and a gas production flow basic value ASV1 (Nm3 / h) and a gas production methane concentration setting value ASV2 (%) after gas distribution;

[0153] S12, collect a current supply concentration AW (%) of the low-concentration gas and a pipeline pressure value of the gas supply pipeline in real time;

[0154] S13, 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 the gas inlet valve opening degree value according to the supply flow setting value and the first correspondence relationship;

[0155] S14, calculate an air real-time demand flow FIC102_SV' (Nm3 / h) of the air mixed in according to a formula FIC102_SV'=ASV1×(AW-ASV2) / AW, and determine an air inlet valve opening degree value of an air supply pipeline connected with the mixer according to the air real-time demand flow.

[0156] Preferably, the method can further comprise:

[0157] S15, obtain monitoring information data collected in real time; the monitoring information data comprises a current value of the gas production methane concentration after gas distribution and a current value of the gas production flow FIQ103_PV collected in real time in the gas production output pipeline;

[0158] S16, calculate a methane concentration calculation value APV1 according to a formula APV1=(FIC101_SV'×AW) / FIQ103_PV;

[0159] S17, 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 production methane concentration is less than a first preset value.

[0160] Optionally, the detailed functions and extended functions of the program can refer to the description above.

[0161] The above product can execute the method provided in the embodiments of the present application, and has the corresponding function modules and beneficial effects of the execution method. Technical details not described in detail in the embodiments can refer to the method provided in other embodiments of the present application.

[0162] Those skilled in the art can understand that the units and algorithm steps of each example 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 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 the present application.

[0163] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0164] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, i.e. they can be located in one place or distributed on multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiment according to actual needs.

[0165] 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.

[0166] It should be understood that the features in the embodiments of the present application can be combined with each other to achieve the purpose of solving the above technical problems.

[0167] 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 or the essential part or part of the technical solutions that make contributions to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number 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 each embodiment 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 various program code storage media.

[0168] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and that the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Therefore, the present application is not intended 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. A method for rapidly dispensing low-concentration gas, characterized by, The method comprises the steps of: S11, a first correspondence relationship between a gas intake valve opening value when a preset pipeline pressure value in a gas supply pipeline connected with the mixer is preset and a low-concentration gas flow, and a gas production flow basic value ASV1 (Nm 3 / h) and a gas production methane concentration set value ASV2 (%) after gas distribution; S12, collecting the current supply concentration AW (%) of low-concentration gas and the pipeline pressure value of the gas supply pipeline in real time; S13, calculates a supply flow rate set value FIC101_SV' (Nm3 / h) of low concentration gas according to a formula FIC101_SV' = ASV1 x ASV2 / AW; and determines the gas intake valve opening degree value according to the supply flow rate set value and the first correspondence relationship. 3 / h); and determines the gas intake valve opening degree value according to the supply flow rate set value and the first correspondence relationship. 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, obtaining the monitoring information data collected in real time; the monitoring information data comprises the current value of the methane concentration of the produced gas after gas distribution collected in real time on the produced gas output pipeline and the current value of the produced gas flow FIQ103_PV; S16, calculating the methane concentration calculation value APV1 according to the formula APV1= (FIC101_SV'×AW) / FIQ103_PV; S17, judging whether the gas distribution is completed according to a preset rule; The preset rule comprises 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.

2. The low-concentration gas rapid gas distribution method according to claim 1, wherein The preset rule further comprises 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.

3. The low-concentration gas rapid gas distribution method according to claim 1, wherein The preset rule further comprises 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.

4. The low-concentration gas rapid proportioning method according to claim 1, characterized in that, Further comprising: A second corresponding relationship between the air inlet valve opening degree value and the air flow when the preset pipeline pressure value of the air supply pipeline connected with the mixer is preset; The air inlet valve opening degree value of the air supply pipeline connected with the mixer is determined according to the real-time demand flow of air, comprising: determining the air inlet valve opening degree value according to the real-time demand flow of air and the second corresponding relationship.

5. The low-concentration gas rapid proportioning method according to claim 4, characterized in that, The first corresponding relationship comprises: setting the low-concentration gas flow to a preset number of gears and determining the gas inlet valve opening degree value corresponding to each gear respectively; The second corresponding relationship comprises: setting the air flow to a preset number of gears and determining the air inlet valve opening degree value corresponding to each gear respectively.

6. The low-concentration gas rapid proportioning method according to any one of claims 1 to 5, characterized in that, Further comprising: When the judgment result of whether the gas distribution is completed is yes, closing the vent valve of the produced gas output pipeline and opening the produced gas valve of the produced gas output pipeline, otherwise, closing the produced gas valve arranged on the produced gas output pipeline and opening the vent valve arranged on the produced gas output pipeline.

7. A low concentration gas rapid gas distribution system characterized by, The method comprises a gas supply pipeline, an air supply pipeline, a produced gas output pipeline, a mixer, and a low-concentration gas rapid gas distribution device; The gas supply pipeline connected with the mixer is provided with a gas inlet valve; the air supply pipeline connected with the mixer is provided with an air inlet valve; and the produced gas output pipeline for connecting the mixer and the oxidation device is provided with a produced gas valve; The low-concentration gas rapid gas distribution device comprises: The preset unit is configured to preset a first corresponding relationship between a gas intake valve opening value and a low-concentration gas flow when a preset pipeline pressure value in a gas supply pipeline, and set a gas production flow basis value ASV1 (Nm 3 / h) and a gas production methane concentration set value ASV2 (%) after gas distribution. A real-time data acquisition unit for collecting the current supply concentration AW (%) of low-concentration gas and the pipeline pressure value of the gas supply pipeline in real time; A first calculation unit configured to calculate a supply flow rate set value FIC101_SV' (Nm 3 / h) of low-concentration gas according to a formula FIC101_SV' = ASV1 x ASV2 / AW, and determine the gas intake valve opening value based on the supply flow rate set value and the first correspondence relationship. 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 based on the real-time air demand flow rate; A monitoring information acquisition unit for obtaining the monitoring information data collected in real time; the monitoring information data comprises the current value of the methane concentration of the produced gas after gas distribution collected in real time on the produced gas output pipeline and the current value of the produced gas flow FIQ103_PV; a gas production concentration calculation unit configured to calculate a methane concentration calculation value APV1 according to a formula APV1= (FIC101_SV'xAW) / FIQ103_PV; a determination unit configured to determine whether the gas blending is qualified according to a preset rule; the preset rule comprises: determining whether a difference between the methane concentration calculation value and a current value of the methane concentration of the gas production is less than a first preset value.

8. The low-concentration gas rapid blending system according to claim 7, characterized in that, the preset rule further comprises: determining whether a difference between the set value of the methane concentration of the gas production and the current value of the methane concentration of the gas production is less than a second preset value.

9. The low-concentration gas rapid blending system according to claim 7, characterized in that, the preset rule further comprises: determining whether a difference between the current value of the gas production flow and a basic value of the gas production flow is less than a third preset value.

10. The low concentration gas quick proportioning system according to claim 7, characterized in that, Further comprising: a second corresponding relationship between an air intake valve opening degree value and an air flow when a preset pipeline pressure value in an air supply pipeline connected with the mixer is preset; the air intake valve opening degree value of the air supply pipeline connected with the mixer according to the real-time demand flow of the air comprises: determining the air intake valve opening degree value according to the real-time demand flow of the air and the second corresponding relationship.

11. The low concentration gas quick proportioning system according to claim 10, characterized in that, the first corresponding relationship comprises: setting the low-concentration gas flow as a preset number of gears and determining a gas intake valve opening degree value corresponding to each gear; the second corresponding relationship comprises: setting the air flow as a preset number of gears and determining an air intake valve opening degree value corresponding to each gear.

12. The low-concentration gas rapid proportioning system according to any one of claims 7 to 11, characterized in that, Further comprising: a vent control unit configured to close a vent valve of the gas production output pipeline and open a gas production valve of the gas production output pipeline when the determination result of whether the gas blending is qualified is yes, or close the gas production valve of the gas production output pipeline and open the vent valve of the gas production output pipeline when the determination result of whether the gas blending is qualified is no.

13. A low-concentration gas rapid gas distribution apparatus, characterized by comprising: comprising: a memory configured to store a computer program; a processor configured to call and execute the computer program to realize the steps of the low-concentration gas rapid blending method according to any one of claims 1 to 6.

14. A storage medium, characterized by a software program adapted to be executed by a processor to realize the steps of the low-concentration gas rapid blending method according to any one of claims 1 to 6.

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