CN-115406497-B - Gas flow indication method and system

Abstract

The application relates to the technical field of gas monitoring, in particular to a gas flow indication method and a gas flow indication system. The method comprises the steps of obtaining a differential pressure test section, obtaining differential pressure information according to the differential pressure test section, judging whether the differential pressure information meets preset differential pressure conditions, obtaining corresponding differential pressure measuring points if the differential pressure information meets the preset differential pressure conditions, obtaining corresponding pipe section information according to the differential pressure measuring points, analyzing pipe section types of the pipe section information, setting corresponding differential pressure sampling points, obtaining target differential pressure according to the differential pressure sampling points, processing the target differential pressure according to preset differential pressure rules to generate target gas flow rate, obtaining relation curve data according to the target differential pressure and the target gas flow rate, and combining the relation curve data and the pipe section information to generate a gas flow indication value. The gas flow indication method and the gas flow indication system provided by the application have the effect of improving the gas flow indication performance in the pipeline.

Inventors

• Request for anonymity

Assignees

• 上海优咨环境科技有限公司

Dates

Publication Date

20260508

Application Date

20220829

Claims (8)

1. 1. A method of indicating gas flow, comprising the steps of: acquiring a differential pressure test section; acquiring pressure difference information according to the pressure difference test section; judging whether the differential pressure information accords with a preset differential pressure condition or not; If the preset pressure difference condition is met, acquiring a corresponding pressure difference measuring point; acquiring corresponding pipe section information according to the differential pressure measuring point; analyzing the pipe section type of the pipe section information, and setting a corresponding differential pressure sampling point; Acquiring a target pressure difference according to the pressure difference sampling point; processing the target pressure difference according to a preset pressure difference rule to generate a target gas flow rate; Acquiring relation curve data according to the target pressure difference and the target gas flow rate; generating a gas flow indication value by combining the relation curve data and the pipe section information; The differential pressure test section is a differential pressure test section for flow monitoring, wherein the differential pressure test section is selected according to the specific condition of the gas pipe network system and is used for selecting a pipeline which needs to be subjected to flow monitoring in the gas pipe network system, the differential pressure information is differential pressure numerical information between differential pressure test sections in the pipeline, the preset differential pressure condition is differential pressure detection standard and detection position information according to the stipulation in the pipeline monitoring system, and the differential pressure measurement point is differential pressure detection position which accords with the preset differential pressure condition in the differential pressure information; the analyzing the pipe section type of the pipe section information and setting the corresponding differential pressure sampling point comprises the following steps: Judging the pipe section type of the pipe section information; If the straight pipe section is the straight pipe section, acquiring pipe diameter information, and setting a straight pipe section pressure difference sampling point according to a preset straight pipe setting rule and the pipe diameter information; If the mixing pipe is a mixing pipe section, mixing pipe information is acquired, and pressure difference sampling points of the mixing pipe section are set according to preset mixing pipe setting rules and the mixing pipe information; the step of setting the differential pressure sampling point of the mixing pipe section according to the preset mixing pipe setting rule and the mixing pipe information comprises the following steps: Acquiring elbow port position information according to the mixing pipe information; Obtaining a target distance standard according to the preset mixing tube setting rule; and setting the differential pressure sampling point of the mixing pipe section according to the target distance standard and the elbow port position information.
2. 2. The method of claim 1, wherein the processing the target pressure difference according to a preset pressure difference rule to generate a target gas flow rate comprises the steps of: Acquiring a corresponding resistance coefficient according to the pipe section type of the pipe section information; Acquiring the pipe section gas density in the pipe section information; and calculating the target pressure difference, the resistance coefficient and the pipe section gas density according to a preset pressure difference rule to generate the target gas flow rate.
3. 3. The gas flow indicating method according to claim 2, wherein the obtaining the corresponding drag coefficient according to the pipe section type of the pipe section information comprises the steps of: acquiring corresponding pipe section specification information according to the pipe section type of the pipe section information; And calculating the pipe section specification information according to a preset resistance rule to obtain a corresponding resistance coefficient.
4. 4. The gas flow indicating method according to claim 1, wherein the pipe section type of the pipe section information includes straight pipe specification information and mixed pipe specification information, and the acquiring the relationship curve data according to the target pressure difference and the target gas flow rate further includes the steps of: Acquiring corresponding along-path resistance according to the straight pipe specification information; Obtaining corresponding local resistance according to the specification information of the mixing tube; and calculating the on-way resistance and the local resistance according to a preset flow rule, and obtaining relation curve data.
5. 5. A gas flow indicating method according to claim 1, wherein said combining said relationship data and said pipe segment information to generate a gas flow indicating value comprises the steps of: acquiring the corresponding pipe network gas temperature according to the pipe section information; judging whether the gas temperature of the pipe network exceeds a preset temperature difference threshold value or not; If the preset temperature difference threshold value is not exceeded, the relation curve data are read, and the gas flow indicated value is generated; if the preset temperature difference threshold value is exceeded, partitioning the gas temperature of the pipe network to generate a target temperature partition; Acquiring the current gas temperature according to the target temperature partition; and calculating the target pressure difference and the current gas temperature according to a preset flow rule, and generating the gas flow indicated value.
6. 6. The gas flow indicating method according to claim 5, wherein said obtaining the current gas temperature according to the target temperature zone comprises the steps of: acquiring a temperature fluctuation value of the target temperature partition according to a preset duration standard; judging whether the temperature fluctuation value exceeds a preset fluctuation threshold value or not; And if the temperature fluctuation value exceeds the preset fluctuation threshold, carrying out temperature correction on a target temperature partition, and acquiring the current gas temperature of the corrected target temperature partition until the temperature fluctuation value of the current gas temperature is in the preset fluctuation threshold.
7. 7. The gas flow indicating method according to claim 5, further comprising the steps of, after said calculating said target differential pressure and said current temperature according to a preset flow rule, generating said gas flow indicating value: Acquiring a real-time gas flow value according to the gas flow indication value; judging whether the real-time gas flow value accords with a preset flow deviation standard or not; And if the preset flow deviation standard is not met, generating an alarm signal according to the real-time gas flow value.
8. 8. A gas flow indicating system, comprising: The first acquisition module (1) is used for acquiring a differential pressure test section; the second acquisition module (2) is used for acquiring pressure difference information according to the pressure difference test section; the judging module (3) is used for judging whether the differential pressure information accords with a preset differential pressure condition or not; The third acquisition module (4) acquires a corresponding differential pressure measuring point if the differential pressure condition is met; a fourth obtaining module (5) for obtaining corresponding pipe section information according to the differential pressure measuring point; The analysis module (6) is used for analyzing the pipe section type of the pipe section information and setting corresponding differential pressure sampling points; a fifth acquisition module (7) for acquiring a target differential pressure according to the differential pressure sampling point; the processing module (8) is used for processing the target pressure difference according to a preset pressure difference rule to generate a target gas flow rate; a data module (9) for acquiring relationship curve data according to the target pressure difference and the target gas flow rate; And the generation module (10) is used for combining the relation curve data and the pipe section information to generate a gas flow indication value.

Description

Gas flow indication method and system Technical Field The application relates to the technical field of gas monitoring, in particular to a gas flow indication method and a gas flow indication system. Background With the improvement of the control requirement of the atmospheric pollution source, the effective collection and transportation of the atmospheric pollution source gas becomes an important control node, and the emission reduction effect of pollutants and the daily operation cost of the system are related. At present, a plurality of gas collection points are arranged on a plurality of gas collection systems in many occasions, such as a capped collection system of sewage treatment facilities of a plurality of enterprises, so as to collect polluted peculiar smell gases in different areas, and a complex gas collection and transportation pipeline system is arranged. Due to various reasons such as vibration change of the opening of the regulating valve, breakage of the gas collecting device caused by gas corrosion, deposition blockage of partial substances in the gas and the like, the gas collecting system often generates huge deviation between the gas conveying flow and the design flow during actual operation, and operators cannot timely know flow information of the gas flow in each pipeline, and cannot timely and effectively regulate and control, so that the overall collecting effect is poor. Disclosure of Invention In order to improve the indication performance of the gas flow in the pipeline, the application provides a gas flow indication method and a gas flow indication system. In a first aspect, the present application provides a method for indicating a gas flow rate, comprising the steps of: acquiring a differential pressure test section; acquiring pressure difference information according to the pressure difference test section; judging whether the differential pressure information accords with a preset differential pressure condition or not; If the preset pressure difference condition is met, acquiring a corresponding pressure difference measuring point; acquiring corresponding pipe section information according to the differential pressure measuring point; analyzing the pipe section type of the pipe section information, and setting a corresponding differential pressure sampling point; Acquiring a target pressure difference according to the pressure difference sampling point; processing the target pressure difference according to a preset pressure difference rule to generate a target gas flow rate; Acquiring relation curve data according to the target pressure difference and the target gas flow rate; and generating a gas flow indication value by combining the relation curve data and the pipe section information. By adopting the technical scheme, whether the differential pressure information of the internal pressure differential test section of the pipeline meets the preset differential pressure condition is judged, so that differential pressure measuring points corresponding to the differential pressure information meeting the preset differential pressure condition are acquired, the corresponding differential pressure sampling points are further set according to the type of the pipeline section information where the differential pressure measuring points are analyzed, the corresponding target differential pressure is acquired, the accuracy of the acquired target differential pressure is further improved, the target differential pressure is processed by utilizing the preset differential pressure rule to generate the target gas flow rate, the target differential pressure and the target gas flow rate are combined, corresponding relation curve data are acquired, and a gas flow indication value is generated according to the actual condition of the pipeline contained in the pipeline, the relation curve data and the pipeline section information, so that the indication performance of the gas flow in the pipeline is improved. Optionally, the analyzing the pipe section type of the pipe section information and setting the corresponding differential pressure sampling point include the following steps: Judging the pipe section type of the pipe section information; If the straight pipe section is the straight pipe section, acquiring pipe diameter information, and setting a straight pipe section pressure difference sampling point according to a preset straight pipe setting rule and the pipe diameter information; if the mixing pipe is the mixing pipe section, mixing pipe information is acquired, and pressure difference sampling points of the mixing pipe section are set according to preset mixing pipe setting rules and the mixing pipe information. By adopting the technical scheme, according to the actual pipe section type of the pipeline in the pipe section information, the corresponding pressure difference sampling points set by the related setting rules are further combined, so that the accuracy of acquiring th