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

Abstract

The application discloses a low-concentration gas safety gas distribution control method, system, equipment and storage medium, and comprises the following steps: setting a gas distribution after gas production flow basic value, a gas production methane concentration setting value, and collecting a current supply concentration of low-concentration gas in real time; calculating a supply flow setting value of the low-concentration gas according to a formula; 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 after stabilizing the low-concentration gas input pressure; calculating an air real-time demand flow of air mixed according to a formula; 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. 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, timeliness and safety 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 safe gas distribution 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 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 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 after the gas is collected 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 the defects of poor adjustment accuracy and timeliness (time distribution accuracy) and safety risk of the running equipment, 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 taken as admitting that the information forms prior art that is already known to those of ordinary skill 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, and the safety of the equipment operation.

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

[0008] S11, setting a gas distribution flow basic value ASV1 (Nm3 / h) and a gas production 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;

[0010] S13, obtaining a real-time inlet pressure of the low-concentration gas inlet in the gas safety protection pipe section and a preset inlet pressure threshold, and determining an opening value of an overpressure vent valve arranged in the gas safety protection pipe section according to a difference between the real-time inlet pressure and the preset inlet pressure threshold;

[0011] S14, determining a gas inlet valve opening value of a gas supply pipe section connected with the gas safety protection pipe section according to the supply flow setting value; another end of the gas supply pipe section is connected with a mixer;

[0012] S15, calculating 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 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.

[0013] Preferably, in the present application, further comprising:

[0014] S14, obtaining real-time collected monitoring information data; the monitoring information data includes a current value of a gas methane concentration after gas distribution in real time collected in the gas output pipe section, and a current value of a gas flow FIQ103_PV;

[0015] S15, calculating a methane concentration calculation value APV1 according to a formula APV1=(FIC101_SV'×AW) / FIQ103_PV;

[0016] S16, 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 gas methane concentration is less than a first preset value.

[0017] Preferably, in the present application, the preset rule further includes judging whether a difference between the set value of the gas methane concentration and the current value of the gas methane concentration is less than a second preset value.

[0018] Preferably, in the present application, the preset rule further includes judging whether a difference between the current value of the gas flow and the basic value of the gas flow is less than a third preset value.

[0019] Preferably, in the present application, further comprising:

[0020] When the judgment result of whether the gas distribution is completed is no, closing a gas valve arranged in the gas output pipe section and opening a vent valve arranged in the gas output pipe section; when the judgment result of whether the gas distribution is completed is yes, closing the vent valve and opening the gas valve.

[0021] In another aspect of the present application, a low-concentration gas safety gas mixing control system is also provided, comprising a gas safety protection pipe section, a gas supply pipe section, an air supply pipe section, a gas output pipe section, a mixer, and a low-concentration gas safety gas mixing control device.

[0022] One end of the gas safety protection pipe section is connected to a low-concentration gas output port, and the other end is connected to the gas supply pipe section. The gas safety protection pipe section is also provided with an overpressure venting valve. The gas supply pipe section connected to the mixer is provided with a gas inlet valve. The air supply pipe section connected to the mixer is provided with an air inlet valve. The gas output pipe section for connecting the mixer and the oxidation device is provided with a gas valve.

[0023] The low-concentration gas safety gas mixing control device comprises:

[0024] A preset unit is configured to set a gas output flow basic value ASV1 (Nm3 / h) and a gas methane concentration set value ASV2 (%) after gas mixing, and to collect a current supply concentration AW (%) of the low-concentration gas in real time.

[0025] An inlet flow calculation unit is configured to calculate a supply flow set value FIC101_SV' (Nm3 / h) of the low-concentration gas according to the formula FIC101_SV' = ASV1 × ASV2 / AW.

[0026] An inlet pressure stabilizing unit is configured to obtain a real-time inlet pressure of the low-concentration gas inlet in the gas safety protection pipe section and a preset inlet pressure threshold value, and to determine an opening value of the overpressure venting valve provided in the gas safety protection pipe section according to a difference between the real-time inlet pressure and the preset inlet pressure threshold value.

[0027] An inlet flow control unit is configured to determine a gas inlet valve opening value of the gas supply pipe section connected to the gas safety protection pipe section according to the supply flow set value. The other end of the gas supply pipe section is connected to the mixer.

[0028] An air flow control unit is configured to calculate an air real-time demand flow FIC102_SV' (Nm3 / h) of the mixed air according to the formula FIC102_SV' = ASV1 × (AW–ASV2) / AW, and to determine an air inlet valve opening value of the air supply pipe section connected to the mixer according to the air real-time demand flow.

[0029] Preferably, in the present application, the low-concentration gas safety gas mixing control device further comprises:

[0030] The monitoring information acquisition unit is configured to acquire real-time monitoring information data, wherein the monitoring information data comprises a current value of the methane concentration of the produced gas after real-time gas distribution in the produced gas output pipe section and a current value of the produced gas flow FIQ103_PV;

[0031] The produced gas concentration calculation unit is configured to calculate a methane concentration calculation value APV1 according to the formula APV1=(FIC101_SV'xAW) / FIQ103_PV.

[0032] The determination unit is configured to determine whether the gas distribution is completed 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.

[0033] 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.

[0034] Preferably, in the present application, the preset rule further comprises determining 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.

[0035] Preferably, in the present application, further comprising:

[0036] The vent control unit is configured to close a produced gas valve arranged in the produced gas output pipe section and open a vent valve arranged in the produced gas output pipe section when the determination result of whether the gas distribution is completed is no, and close the vent valve and open the produced gas valve when the determination result of whether the gas distribution is completed is yes.

[0037] Preferably, in the present application, the produced gas output pipe section further comprises a flame arrester.

[0038] Preferably, in the present application, the produced gas output pipe section further comprises an explosion suppression water spraying device.

[0039] In another aspect of the embodiment of the present application, a low-concentration gas safety gas distribution control device is further provided, comprising:

[0040] The memory is configured to store a computer program.

[0041] The processor is configured to call and execute the computer program to realize each step of the low-concentration gas safety gas distribution control method according to any one of the above.

[0042] In another aspect of the embodiment of the present application, a storage medium having a computer program stored thereon is further provided, wherein the computer program is executed by a processor to realize each step of the low-concentration gas safety gas distribution control method according to any one of the above.

[0043] The low-concentration gas safety gas mixing control device comprises a computer program stored on a medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform the method described in the above aspects and achieve the same technical effects.

[0044] Compared with the prior art, the present application has the following beneficial effects:

[0045] From the above scheme, it can be seen that the low-concentration gas safety gas mixing 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 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 pipe section according to the current supply concentration of the low-concentration gas. In this way, 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 first adjusts the pressure of the input low-concentration gas, and then actively adjusts the gas inlet flow and the air inlet flow according to the fluctuation of the concentration of the input low-concentration gas, the fluctuation range of the gas production concentration caused by the fluctuation of the concentration 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, rather than passively adjusting when the concentration and flow of the mixed gas change, so the adjustment accuracy and timeliness (time adjustment accuracy) of the gas mixing adjustment can be effectively improved.

[0046] In the present application, the pressure of the input low-concentration gas can be pre-stabilized when the pressure fluctuates through the overpressure vent valve of the gas safety protection pipe section, and the related risks of subsequent equipment can be avoided in time through venting when the pressure is abnormal, thereby improving the safety of equipment operation.

[0047] 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, and 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 described below, and the drawings are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the present application, the drawings required by the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0049] Figure 1is a step diagram of the low-concentration gas safety gas distribution control method in the present application;

[0050] Figure 2 is a structure schematic diagram of the low-concentration gas safety gas distribution control system in the present application;

[0051] Figure 3 is a step diagram of the low-concentration gas safety gas distribution control method in the present application;

[0052] Figure 4 is a structure schematic diagram of the low-concentration gas safety gas distribution control device in the present application;

[0053] Figure 5 is a structure schematic diagram of the low-concentration gas safety gas distribution control equipment in the present application. DETAILED DESCRIPTION

[0054] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of protection of the present application is not limited by the specific embodiments.

[0055] Unless otherwise explicitly indicated, in the entire specification and claims, the term "comprise" or its variants such as "contain" or "include" and the like will be understood to include the stated element or component without excluding other elements or components.

[0056] In this paper, the terms "first", "second", etc. 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", etc. can also be interchanged with each other.

[0057] Example One

[0058] In order to effectively improve the adjustment accuracy and timeliness of gas distribution adjustment, and the safety of equipment operation, such as Figure 1 As shown in the embodiments of the present application, a low-concentration gas safety gas distribution control method is provided, comprising the steps of:

[0059] S11, setting the gas distribution after gas flow basic value ASV1 (Nm3 / h) and gas methane concentration setting value ASV2 (%), and real-time acquisition of the current supply concentration AW (%) of low-concentration gas;

[0060] The low-concentration gas safety gas distribution control method in the embodiments of the present application can be realized in a specific low-concentration gas safety gas distribution control system, which includes, for example Figure 2The working equipment of the illustrated entity: including a gas safety protection pipe section 01, a gas supply pipe section 11, an air supply pipe section 21, a gas output pipe section 41, a mixer 31, and, as Figure 4 The illustrated computing processing equipment: a low-concentration gas safety gas distribution control device; wherein the low-concentration gas safety gas distribution control device, as an equipment with data processing function, can work with the automatic control device of the valve control to implement the low-concentration gas safety gas distribution control method in the embodiment of the application, and control the valves in each pipe section to realize the control of the gas flow in each pipe section, and further achieve the purpose of safe gas distribution regulation.

[0061] One end of the gas safety protection pipe section 01 is connected with a low-concentration gas output port, and the other end is connected with the gas supply pipe section 11, and the gas safety protection pipe section 01 is further provided with an overpressure venting valve 02; 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; the gas output pipe section 41 for connecting the mixer 31 and the oxidation device is provided with a gas valve 42.

[0062] In the embodiment of the application, the low-concentration gas safety gas distribution control refers to adjusting and controlling the proportion of low-concentration gas and air when mixing the low-concentration gas and air, so that the methane concentration of the mixed gas (i.e. the generated gas) can meet the specific industrial application requirements, and the embodiment of the application takes the generated gas generated after mixing by the mixer to supply the oxidation device as an example to carry out oxidation and heat release.

[0063] In actual application, the smaller the flow fluctuation and the smaller the methane concentration fluctuation of the generated gas generated 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 beneficial to the normal operation of the downstream device (such as the oxidation device).

[0064] In order to reduce the flow and methane concentration fluctuation of the generated gas, the embodiment of the application pre-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 set value); and then the corresponding air supply amount can be calculated according to the two set values and the current supply concentration of the low-concentration gas.

[0065] In the embodiment of the 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 set value (ASV2 (%)) refers to the pre-set 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 set 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).

[0066] 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;

[0067] According to the functional relationship between the gas concentration and the volume (the embodiment of the present application takes the flow as an indirect parameter equivalent to the volume), the embodiment of the present application sets a formula (formula 1) for calculating the supply flow set value of the low-concentration gas into the gas supply pipe section 11;

[0068] FIC101_SV'=ASV1*ASV2 / AW, formula (1)

[0069] In formula (1), FIC101_SV' is the supply flow set value of the low-concentration gas, with the unit of (Nm3 / h); ASV1 is the set gas distribution basis value of the gas production flow, with the unit of (Nm3 / h); ASV2 is the set gas production methane concentration value, with the unit of (%); and AW is the current supply concentration of the low-concentration gas collected in real time, with the unit of (%).

[0070] S13, obtaining a real-time inlet pressure of the low-concentration gas inlet in the gas safety protection pipe section and a preset inlet pressure threshold, and determining an opening value of an overpressure vent valve arranged in the gas safety protection pipe section according to a difference between the real-time inlet pressure and the preset inlet pressure threshold;

[0071] In the actual equipment operation process, the inlet pressure of the initially input low-concentration gas may fluctuate. On the one hand, this will have a negative impact on the flow control difficulty and control effect of each subsequent pipe, and on the other hand, since the object of gas distribution is a flammable and explosive dangerous gas, pressure fluctuation may also cause safety risks. Therefore, in the embodiment of the present application, a gas safety protection pipe section 01 is first arranged at the initial output port of the low-concentration gas, and an overpressure vent valve 02 is arranged in the pipe section to stabilize and safely control the low-concentration gas for gas distribution.

[0072] Specifically, one or more pressure thresholds can be set, or the adjustment range of the opening value of the overpressure vent valve 02 can be determined by establishing a corresponding relationship between multiple pressure values and the opening value of the overpressure vent valve 02. In this way, by adjusting the opening value of the overpressure vent valve 02, the pressure value of the low-concentration gas in the gas safety protection pipe section 01 is kept within a stable threshold range.

[0073] S14, determining a gas inlet valve opening value of a gas supply pipe section connected with the gas safety protection pipe section according to the supply flow set value; the other end of the gas supply pipe section is connected with the mixer;

[0074] After obtaining the low-concentration gas with stable pressure, the opening value of the gas inlet valve 12 (i.e., the gas inlet valve opening value) is determined according to the corresponding relationship between the gas flow and the valve opening and the calculated supply flow setting value.

[0075] It should be noted that this step can be implemented when the gas is initially distributed, or 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.

[0076] S15, calculating the real-time air demand flow FIC102_SV' (Nm3 / h) of the air to be mixed according to the formula FIC102_SV' = ASV1 × (AW-ASV2) / AW; and determining the air inlet valve opening value of the air supply pipe section connected with the mixer according to the real-time air demand flow.

[0077] On the basis of the appropriate opening value of the gas inlet valve 12, the amount of air to be supplied also needs to be further determined; 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 real-time air demand flow of the air to be mixed in the air supply pipe section 21;

[0078] FIC102_SV' = ASV1 × (AW-ASV2) / AW, (Formula 2);

[0079] In Formula (2), FIC102_SV' is the real-time air demand flow of the air to be mixed, and the unit is (Nm3 / h).

[0080] Then, the opening value of the air inlet valve 22 (i.e., the air inlet valve opening value) is determined according to the corresponding relationship between the gas pressure, the gas flow and the valve opening and the calculated air demand.

[0081] Through the above steps, 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 according to the different current supply concentrations of the low-concentration gas, so that the methane concentration after the gas distribution can be kept basically stable, and the gas flow can be basically stable.

[0082] In summary, the low-concentration gas safety gas blending 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 a target gas production flow (i.e., a gas production flow basic value) and a target gas production concentration (i.e., a gas production methane concentration set 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. In the embodiment of the present application, the pressure of the input low-concentration gas is first adjusted, and then the gas inlet flow and the air inlet flow are actively adjusted according to the fluctuation of the concentration of the input low-concentration gas, so that the fluctuation range of the gas production concentration caused by the fluctuation of the concentration of the input low-concentration gas can be effectively reduced. In addition, the control amount of the air mixing flow is directly generated according to the fluctuation of the concentration of the input low-concentration gas in the embodiment of the present application, instead of being passively adjusted when the concentration and flow of the mixed gas change, so that the adjustment accuracy and timeliness (time adjustment accuracy) of the gas blending adjustment can be effectively improved.

[0083] In the embodiment of the present application, the pressure of the input low-concentration gas can be pre-stabilized when the pressure of the input low-concentration gas fluctuates through the overpressure vent valve of the gas safety protection pipe section, and the related risks of subsequent equipment can be avoided in time through venting when the pressure is abnormal, so that the equipment operation safety is also improved.

[0084] Embodiment Two

[0085] Based on the embodiment one, as shown in the embodiment two, Figure 3 The low-concentration gas safety gas blending control method in the embodiment of the present application can further include the following steps:

[0086] S16, obtaining real-time collected monitoring information data; the monitoring information data includes a real-time collected gas production methane concentration current value of the gas blending in the gas production output pipe section, and a gas production flow current value FIQ103_PV;

[0087] In order to improve the safety and stability of automatic gas blending, the embodiment of the present application further includes a judgment step for the gas blending completion degree, for which the corresponding monitoring information data is first obtained as a judgment basis.

[0088] The real-time collected gas production methane concentration current value 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 gas production methane concentration current value), and the methane concentration value (i.e., the gas production methane concentration current value) of the gas production can be obtained in real time by arranging a concentration sensor in the gas production output pipe section 41;

[0089] In addition, the monitoring information data further includes a flow value of the produced gas (i.e., a current flow value of the produced gas) collected in real time at the produced gas output pipe section 41.

[0090] S17, a theoretical methane concentration (i.e., a calculated methane concentration value) in the produced gas output pipe section 41 is calculated according to the formula (3);

[0091] APV1=(FIC101_SV'xAW) / FIQ103_PV, formula (3);

[0092] In the formula (3), APV1 is the calculated methane concentration value, and the unit is (%); and FIQ103_PV is the flow value of the produced gas (i.e., the current flow value of the produced gas) collected in real time at the produced gas output pipe section 41.

[0093] S18, whether the gas distribution is completed is judged according to a preset rule; the preset rule includes judging whether a difference between the calculated methane concentration value and the current methane concentration value of the produced gas is less than a first preset value.

[0094] When the gas distribution is completed, the calculated methane concentration value should be basically consistent with the actually measured current methane concentration value of the produced gas, and thus whether the difference between the calculated methane concentration value and the current methane concentration value of the produced gas is less than the first preset value can be used as a main judgment basis to judge whether the gas distribution is completed.

[0095] In actual application, the first preset value can be set by a person skilled in the art according to actual conditions and a floating precision of the produced gas concentration, and is not specifically limited here.

[0096] In addition, further, in the embodiment of the present application, the preset rule can further include judging whether a difference between the set methane concentration value of the produced gas and the current methane concentration value of the produced gas is less than a second preset value.

[0097] In the embodiment of the present application, the set methane concentration value of the produced gas is set at the beginning, and the set methane concentration value of the produced gas is suitable for production requirements of the oxidation device; in order to meet safety production requirements and facilitate operation requirements of the oxidation device, whether the gas distribution is completed can be further judged by judging whether the difference between the set methane concentration value of the produced gas and the current methane concentration value of the produced gas is less than the second preset value, so as to ensure that the methane concentration of the produced gas can meet the safety production requirements and the good operation requirements of the device.

[0098] In actual application, the second preset value can also be set by a person skilled in the art according to actual conditions and a floating precision of the produced gas concentration requirement, and is not specifically limited here.

[0099] Further, in the embodiment of the present application, the preset rule can further include: judging whether the difference between the current value of the gas production flow and the basic value of the gas production flow is less than a third preset value. In this way, the stability of the gas production flow and the compliance with the expectation are taken as another judgment condition for judging whether the gas distribution is completed, thereby further increasing the safety in the actual production process and being more conducive to the demand for good operation of the device.

[0100] In actual application, in order to ensure the safety of the gas distribution and avoid the substandard gas production to downstream equipment (such as an oxidation device), the embodiment of the present application can further include the following steps:

[0101] When the judgment result of whether the gas distribution is completed is no, the gas valve 42 arranged at the gas production output pipe section is closed and the vent valve 43 arranged at the gas production 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.

[0102] 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 completion of the gas distribution, thereby ensuring the safety of the production process.

[0103] 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, thereby realizing the recycling of the gas production that does not meet the requirements of the downstream device into the gas supply pipe section, so as to avoid the waste of energy.

[0104] Embodiment three

[0105] Corresponding to the method embodiment, the embodiment of the present application further provides a low-concentration gas safety distribution control system including a low-concentration gas safety distribution control device, Figure 4 The structure schematic diagram of the low-concentration gas safety distribution control device provided by the embodiment of the present application is shown, and the low-concentration gas safety distribution control device is a virtual device corresponding to the low-concentration gas safety distribution control method in the embodiment of the present application. Figure 1 Or Figure 3 The device corresponding to the low-concentration gas safety distribution control method in the corresponding embodiment, that is, the low-concentration gas safety distribution control device is realized in the form of a virtual device Figure 1 Or Figure 3 The low-concentration gas safety distribution control method in the corresponding embodiment, each virtual module constituting the low-concentration gas safety distribution control device can be executed by an electronic device, such as a network device, a terminal device, or a server.

[0106] Specifically, referring to Figures 1 to 3 The low-concentration gas safety distribution control system in the embodiment of the present application includes a gas safety protection pipe section 01, a gas supply pipe section 11, an air supply pipe section 21, a gas production output pipe section 41, a mixer 31, and a gas inlet valve 12, a vent valve 43, and a gas valve 42.Figure 4 The illustrated computing processing device: low-concentration gas safety gas distribution control device; wherein the low-concentration gas safety gas distribution control device as a device with data processing function, can work with the automatic control device of valve regulation to implement the low-concentration gas safety gas distribution control method in the embodiment of the application, the valve in each pipe section is regulated, so as to realize the control of gas flow in each pipe section, and then the purpose of safe gas distribution regulation is achieved.

[0107] One end of the gas safety protection pipe section 01 is connected with the low-concentration gas output port, and the other end is connected with the gas supply pipe section 11, and the gas safety protection pipe section 01 is also provided with an overpressure vent valve 02; 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; the gas production output pipe section 41 for connecting the mixer 31 and the oxidation device is provided with a gas production valve 42.

[0108] In the embodiment of the application, the low-concentration gas safety 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. gas production) can meet the specific industrial application requirements, and the embodiment of the application takes the mixed gas generated after the mixer as an example to supply the oxidation device to perform oxidation and heat release.

[0109] In actual application, the smaller the flow fluctuation and the smaller the methane concentration fluctuation of the mixed gas generated after the mixer 31, the higher the utilization rate of the energy of the gas production, and the higher the safety of the production, which is also beneficial to the normal operation of the downstream device (such as the oxidation device).

[0110] The low-concentration gas safety gas distribution control device comprises:

[0111] The preset unit 101 is used for setting the gas production flow basic value ASV1 (Nm3 / h) and the gas production methane concentration setting value ASV2 (%) after gas distribution, and collecting the current supply concentration AW (%) of low-concentration gas in real time;

[0112] The inlet flow calculation unit 102 is used for calculating the supply flow setting value FIC101_SV' (Nm3 / h) of low-concentration gas according to the formula FIC101_SV'= ASV1*ASV2 / AW;

[0113] The inlet pressure stabilizing unit 103 is used for obtaining the real-time inlet pressure of low-concentration gas inlet in the gas safety protection pipe section and the preset inlet pressure threshold value, and determining the opening value of the overpressure vent valve arranged in the gas safety protection pipe section according to the difference between the real-time inlet pressure and the preset inlet pressure threshold value.

[0114] The gas inlet flow control unit 104 is configured to determine the gas inlet valve opening value of the gas supply pipe section connected with the gas safety protection pipe section according to the supply flow set value; the other end of the gas supply pipe section is connected with the mixer;

[0115] The air flow control unit 105 is configured to calculate the air real-time demand flow FIC102_SV'(Nm3 / h) of the mixed air according to the formula FIC102_SV' = ASV1 x (AW-ASV2) / AW, 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.

[0116] Further, in the embodiment of the present application, the low-concentration gas safety gas distribution control device can further comprise:

[0117] The monitoring information acquisition unit 106 is configured to acquire the real-time collected monitoring information data; the monitoring information data comprises the current value of the methane concentration of the produced gas after the real-time gas distribution of the produced gas output pipe section, and the current value of the produced gas flow FIQ103_PV;

[0118] The produced gas concentration calculation unit 107 is configured to calculate the methane concentration calculation value APV1 according to the formula APV1 = (FIC101_SV' x AW) / FIQ103_PV;

[0119] The determination unit 108 is configured to determine whether the gas distribution is completed according to a preset rule; the preset rule comprises: determining 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.

[0120] Preferably, in the embodiment of the present application, the low-concentration gas safety gas distribution control device can further comprise:

[0121] The vent control unit (not shown in the figure) is configured to close the produced gas valve 42 arranged in the produced gas output pipe section 41 and open the vent valve 43 arranged in the produced 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 produced gas valve 42 when the determination result of whether the gas distribution is completed is yes.

[0122] In actual application, the specific control mode of the overpressure vent valve 02 and the gas inlet valve 12 in the embodiment of the present application can be as follows:

[0123] One of them can be that the inlet flow value of the low-concentration gas before the overpressure vent valve 02 and the pressure value of the low-concentration gas after the overpressure vent valve 02 are used together with the opening value of the overpressure vent valve 02 and the gas inlet valve 12, which is the same control loop, and a simple PID control algorithm is adopted.

[0124] In addition, the low-concentration gas safety gas distribution control system can also be used to control the opening value of the overpressure vent valve 02 and the opening value of the gas inlet valve 12 by using the inlet flow value of the low-concentration gas before the overpressure vent valve 02 and the pressure value of the low-concentration gas after the overpressure vent valve 02. When the opening value of the gas inlet valve 12 is adjusted, the opening of the overpressure vent valve 02 is adjusted. Here, it is also the same control loop, but has control priority, and adopts a simple PID control algorithm.

[0125] In addition, the low-concentration gas safety gas distribution control system can also be used to control the opening value of the overpressure vent valve 02 and the opening value of the gas inlet valve 12 by using the inlet flow value of the low-concentration gas before the overpressure vent valve 02 and the pressure value of the low-concentration gas after the overpressure vent valve 02. When the opening value of the gas inlet valve 12 is adjusted, the opening of the overpressure vent valve 02 is adjusted. Here, it is also the same control loop, but has control priority, and adopts a simple PID control algorithm.

[0126] In addition, in order to improve the safety of the gas distribution control process, the gas production output pipe section can also be provided with a flame arrester and / or explosion suppression water spraying device, so as to avoid the occurrence of accidental combustion and other dangerous accidents.

[0127] It should be noted that the specific implementation mode and technical effect of the low-concentration gas safety gas distribution control system and the low-concentration gas safety gas distribution control device in the embodiment of the present application can refer to the corresponding low-concentration gas safety gas distribution control method in Figure 1 and Figure 3 The specific implementation mode and technical effect of the low-concentration gas safety gas distribution control system and the low-concentration gas safety gas distribution control device in the embodiment of the present application can refer to the corresponding low-concentration gas safety gas distribution control method in

[0128] Embodiment four

[0129] Corresponding to the method embodiment, the embodiment of the present application also provides a low-concentration gas safety gas distribution control device, such as a terminal, a server, etc. The server can be an independent 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 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.

[0130] An example diagram of a hardware structure block diagram of the low-concentration gas safety gas distribution control device provided by the embodiment of the present application is shown in Figure 5 which can include:

[0131] a processor 1, a communication interface 2, a memory 3, and a communication bus 4;

[0132] The processor 1, the communication interface 2, and the memory 3 can communicate with each other through the communication bus 4;

[0133] Optionally, the communication interface 2 can be an interface of a communication module, such as an interface of a GSM module.

[0134] The processor 1 can be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement one or more embodiments of the present application.

[0135] 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.

[0136] The processor 1 is specifically configured to execute a computer program stored in the memory 3 to perform the following steps:

[0137] S11, setting a gas production flow rate basis value ASV1 (Nm3 / h) and a gas production methane concentration set value ASV2 (%) after gas distribution, and collecting a current supply concentration AW (%) of low-concentration gas in real time;

[0138] S12, calculating a supply flow rate set value FIC101_SV' (Nm3 / h) of the low-concentration gas according to the formula FIC101_SV' = ASV1 x ASV2 / AW;

[0139] S13, acquiring a real-time inlet pressure of low-concentration gas inlet in the gas safety protection pipe section and a preset inlet pressure threshold, and determining an opening value of an overpressure vent valve arranged in the gas safety protection pipe section according to a difference between the real-time inlet pressure and the preset inlet pressure threshold;

[0140] S14, determining a gas inlet valve opening value of a gas supply pipe section connected with the gas safety protection pipe section according to the supply flow rate set value; the other end of the gas supply pipe section is connected with a mixer;

[0141] S15, calculating an air real-time demand flow rate FIC102_SV' (Nm3 / h) of air mixed with air according to the formula FIC102_SV' = ASV1 x (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 rate.

[0142] Preferably, the embodiments of the present application can further include:

[0143] S16, acquiring monitoring information data collected in real time; the monitoring information data includes a current value of the gas production methane concentration after gas distribution and a current value of the gas production flow rate FIQ103_PV collected in real time in the gas production output pipe section;

[0144] S17, calculating a methane concentration calculated value APV1 according to a formula APV1=(FIC101_SV'xAW) / FIQ103_PV;

[0145] S18, judging whether the gas distribution is completed according to a preset rule; the preset rule includes judging whether a difference between the methane concentration calculated value and the current methane concentration value of the produced gas is less than a first preset value.

[0146] The product can execute the method provided by the embodiment of the application, has the function modules and beneficial effects corresponding to the execution method. Technical details not described in detail in the embodiment can be referred to the low-concentration gas safety gas distribution control method provided by the embodiment of the application.

[0147] Embodiment five

[0148] 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:

[0149] S11, setting a produced gas flow basis value ASV1 (Nm3 / h) and a methane concentration set value ASV2 (%) after gas distribution, and collecting a current supply concentration AW (%) of the low-concentration gas in real time;

[0150] S12, calculating a supply flow set value FIC101_SV' (Nm3 / h) of the low-concentration gas according to a formula FIC101_SV'=ASV1xASV2 / AW;

[0151] S13, acquiring a real-time inlet pressure of the low-concentration gas inlet in the gas safety protection pipe section and a preset inlet pressure threshold, and determining an opening value of an overpressure vent valve arranged in the gas safety protection pipe section according to a difference between the real-time inlet pressure and the preset inlet pressure threshold;

[0152] S14, determining a gas inlet valve opening value of a gas supply pipe section connected with the gas safety protection pipe section according to the supply flow set value; the other end of the gas supply pipe section is connected with a mixer;

[0153] S15, calculating an air real-time demand flow FIC102_SV' (Nm3 / h) of the air mixed with the air according to a formula FIC102_SV'=ASV1x(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.

[0154] Preferably, the embodiment of the application can also include:

[0155] S16, acquire the real-time collected monitoring information data; the monitoring information data includes a current value of the methane concentration of the produced gas after the gas distribution in the produced gas output pipe section is collected in real time, and a current value of the produced gas flow FIQ103_PV;

[0156] S17, calculate a calculated value APV1 of the methane concentration according to a formula APV1=(FIC101_SV'xAW) / FIQ103_PV;

[0157] S18, determine whether the gas distribution is completed according to a preset rule; the preset rule includes determining whether a difference between the calculated value of the methane concentration and the current value of the methane concentration of the produced gas is less than a first preset value.

[0158] Optionally, the refinement function and the expansion function of the program can refer to the description above.

[0159] 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 detail in the embodiments can refer to the method provided by other embodiments of the application.

[0160] 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 mode depends on the specific application and design constraints of the technical solutions. The skilled person can use different methods for each specific application to realize the described functions, but such implementation should not be considered beyond the scope of the present application.

[0161] 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 displayed or discussed each other can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0162] The units described as separate components can or can not be physically separated, and the components displayed as units can or can not be physical units, that is, they can be located in one place, or can be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0163] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0164] It should be understood that the embodiments of the present application, from the right, each embodiment, features can be combined with each other, all can achieve the solution of the foregoing technical problems.

[0165] The functions described can be implemented in software, firmware, hardware, or any combination thereof. If implemented in software, the functions can be stored or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media include both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage medium can be any available medium that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or any other medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor, then the coaxial cable, fiber optic cable, twisted pair, DSL, or all other medium is properly termed a computer-readable medium. Therefore, a computer-readable medium can also be called a computer-readable storage medium.

[0166] The above description of disclosed embodiments allows a person skilled in the art to implement or use the present application. Various modifications to these 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 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 low concentration gas safety gas distribution control method, characterized by, The method comprises the steps of: S11, setting a gas production flow rate base value ASV1 and a methane concentration setting value ASV2 after gas distribution, and collecting a current supply concentration AW of low-concentration gas in real time; S12, calculating a supply flow rate setting value FIC101_SV' of low-concentration gas according to the formula FIC101_SV' = ASV1×ASV2 / AW; S13, obtaining a real-time inlet pressure of low-concentration gas inlet in the gas safety protection pipe section and a preset inlet pressure threshold, and determining an opening value of an overpressure vent valve arranged in the gas safety protection pipe section according to the difference between the real-time inlet pressure and the preset inlet pressure threshold; S14, determining a gas inlet valve opening value of a gas supply pipe section connected with the gas safety protection pipe section according to the supply flow rate setting value; the other end of the gas supply pipe section is connected with a mixer; S15, calculating an air real-time demand flow rate FIC102_SV' of air mixed with air according to the 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 rate; S16, obtaining monitored information data collected in real time; the monitored information data comprises a current value of the methane concentration of the gas production after gas distribution and a current value of the gas production flow rate FIQ103_PV collected in real time in the gas production output pipe section; S17, calculating a methane concentration calculation value APV1 according to the formula APV1= (FIC101_SV'×AW) / FIQ103_PV; S18, 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 gas production is less than a first preset value.

2. The low-concentration gas safety gas distribution control method according to claim 1, wherein The preset rule further comprises judging whether the difference between the methane concentration setting value and the current value of the methane concentration of the gas production is less than a second preset value.

3. The low-concentration gas safety gas distribution control method according to claim 1, wherein The preset rule further comprises judging whether the difference between the current value of the gas production flow rate and the gas production flow rate base value is less than a third preset value.

4. The low-concentration gas safety proportioning control method according to any one of claims 1 to 3, characterized by, Further comprising: When the judgment result of whether the gas distribution is completed is yes, closing a vent valve of the gas production output pipe section and opening a gas production valve of the gas production output pipe section, otherwise, closing a gas production valve arranged in the gas production output pipe section and opening a vent valve arranged in the gas production output pipe section.

5. A low concentration gas safety gas distribution control system, characterized by, The device comprises a gas safety protection pipe section, a gas supply pipe section, an air supply pipe section, a gas production output pipe section, a mixer, and a low-concentration gas safety gas distribution control device. One end of the gas safety protection pipe section is connected with a low-concentration gas outlet, and the other end is connected with the gas supply pipe section, and the gas safety protection pipe section is further provided with an overpressure venting valve; the gas supply pipe section connected with the mixer is provided with a gas inlet valve; the air supply pipe section connected with the mixer is provided with an air inlet valve; and the gas output pipe section for connecting the mixer and the oxidation device is provided with a gas outlet valve; The low-concentration gas safety gas distribution control device comprises: a preset unit, which is configured to set a gas distribution gas flow basic value ASV1 and a gas distribution methane concentration setting value ASV2, and to collect a current supply concentration AW of the low-concentration gas in real time; an inlet flow calculation unit, which is configured to calculate a supply flow setting value FIC101_SV' of the low-concentration gas according to a formula FIC101_SV'= ASV1×ASV2 / AW; an inlet pressure stabilization unit, which is configured to obtain a real-time inlet pressure of the low-concentration gas inlet in the gas safety protection pipe section and a preset inlet pressure threshold, and to determine an opening value of the overpressure venting valve arranged in the gas safety protection pipe section according to a difference between the real-time inlet pressure and the preset inlet pressure threshold; an inlet flow control unit, which is configured to determine a gas inlet valve opening value of the gas supply pipe section connected with the gas safety protection pipe section according to the supply flow setting value; and the other end of the gas supply pipe section is connected with the mixer; an air flow control unit, which is configured to calculate an air real-time demand flow FIC102_SV' of the mixed air according to a formula FIC102_SV'= ASV1×(AW-ASV2) / AW, and to determine an air inlet valve opening value of the air supply pipe section connected with the mixer according to the air real-time demand flow; a monitoring information acquisition unit, which is configured to acquire 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 in the gas output pipe section; a gas concentration calculation unit, which is configured to calculate a methane concentration calculation value APV1 according to a formula APV1=(FIC101_SV'×AW) / FIQ103_PV; a determination unit, which 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.

6. The low-concentration gas safety gas distribution control system according to claim 5, wherein the preset rule further comprises: determining whether a difference between the gas distribution methane concentration setting value and the current value of the gas distribution methane concentration is less than a second preset value.

7. The low-concentration gas safety gas distribution control system according to claim 5, wherein the preset rule further comprises: determining whether a difference between the current value of the gas flow and the gas flow basic value is less than a third preset value.

8. The low concentration gas safety proportion control system according to any one of claims 5 to 7, characterized in that, Further comprising: A vent control unit is configured to close a vent valve of the gas output pipe section and open a gas valve of the gas output pipe section when a result of the judgment on whether the gas distribution is completed is positive, and otherwise, to close the gas valve of the gas output pipe section and open the vent valve of the gas output pipe section.

9. The low concentration gas safety proportioning control system according to claim 5, wherein, The gas output pipe section further comprises a flame arrester.

10. The low concentration gas safety proportioning control system according to claim 5, wherein, The gas output pipe section further comprises an explosion suppression water spraying device.

11. The low concentration gas safety proportioning control system according to claim 8, wherein, Further comprising: A return pipe section for connecting the vent valve and a gas inlet end of a gas inlet valve.

12. A low concentration gas safety gas distribution control apparatus, characterized by comprising: Comprising: A memory for storing a computer program; A processor for calling and executing the computer program to implement the steps of the low-concentration gas safe distribution control method according to any one of claims 1 to 4.

13. A storage medium, characterized by A software program adapted to be executed by a processor to implement the steps of the low-concentration gas safe distribution control method according to any one of claims 1 to 4.

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