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A method for on-line monitoring and ventilation linkage control of gas tanks in integrated pipe gallery

A comprehensive pipe gallery and gas technology, applied in the pipeline system, gas/liquid distribution and storage, mechanical equipment, etc., can solve the problems of inability to realize timely and safe monitoring and dynamic linkage ventilation, and inability to ensure economical and effective release

Active Publication Date: 2020-04-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0026] The purpose of the present invention is to solve the problem that the technology of timely and safe monitoring and dynamic linkage ventilation cannot be realized when the gas leaks in the comprehensive pipe gallery in the existing project, and the problem that the explosion hazard cannot be guaranteed economically and effectively, and proposes a comprehensive pipe gallery On-line monitoring and ventilation linkage control method of gas cabin

Method used

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  • A method for on-line monitoring and ventilation linkage control of gas tanks in integrated pipe gallery
  • A method for on-line monitoring and ventilation linkage control of gas tanks in integrated pipe gallery
  • A method for on-line monitoring and ventilation linkage control of gas tanks in integrated pipe gallery

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specific Embodiment approach 1

[0053] Specific implementation manner 1: The method for online monitoring and ventilation linkage control of the integrated pipeline gallery gas cabin of this embodiment is:

[0054] Step 1. The natural gas concentration monitor performs real-time monitoring of the natural gas concentration in the independent gas compartment of the integrated pipeline gallery;

[0055] The pipeline pressure sensor monitors the pressure of natural gas in the pipeline in real time;

[0056] Determine whether the monitored signal corresponds to the category of "no leakage", "minor leakage", or "dangerous leakage",

[0057] If the volume fraction of gas leakage concentration measured at the measuring point in the independent gas compartment of the integrated pipeline gallery is c<1%, it belongs to the category of "no leakage";

[0058] If the volume fraction of the gas leakage concentration measured at the measuring point in the gas independent compartment of the integrated pipeline gallery is 1%≤c≤5%, the ...

specific Embodiment approach 2

[0062] Specific embodiment two: this embodiment is different from specific embodiment one in that the specific setting process of the natural gas concentration monitor in the step one is:

[0063] Separate gas compartments are equipped with a fire compartment every 200m. Therefore, the principle of monitoring natural gas leakage in the compartment is to use the least number of monitors to quickly detect the leaked natural gas;

[0064] According to the operating pressure of the natural gas pipeline in the independent compartment of the integrated pipeline gallery (less than or equal to 1.6MP) and the most unfavorable orifice leakage condition (when the orifice is 0-6.35mm, the most unfavorable orifice leakage condition is 6.35mm). Simulation method (using ANSYS pre-processing software ICEM to establish a physical model of natural gas leakage and diffusion in the integrated pipeline gallery and perform grid division, give corresponding mathematical models and boundary conditions, use...

Embodiment approach

[0066] Implementation method: According to the operating parameters of the gas cabin pipeline, the numerical simulation method is used to simulate the concentration field distribution of natural gas leakage under the most unfavorable conditions, and the natural gas concentration monitors are arranged in sequence along the maximum change point of the concentration field distribution contour , And then orthogonalize the monitors at different locations, filter out the monitoring information and present the monitors with linear correlation, and all online monitor signals are wirelessly transmitted to the integrated detection module.

[0067] Other steps and parameters are the same as in the first embodiment.

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Abstract

The invention relates to an online monitoring and ventilating linkage control method for a gas cabin of a comprehensive pipe gallery. The online monitoring and ventilating linkage control method aimsat solving the technical problem that in existing engineering, when gas in the comprehensive pipe gallery leaks, timely and safe monitoring and dynamic linkage ventilation cannot be achieved and the problem that the explosion danger cannot be relieved economically and effectively. The online monitoring and ventilating linkage control method comprises the steps that firstly, whether monitored signals correspond to the 'no-leakage' type, or the 'tiny leakage' type or the 'dangerous leakage' type is determined; secondly, distribution boundaries of 'no-leakage', 'tiny leakage' and 'dangerous leakage' in the plane are calculated, and thus corresponding areas of the 'no-leakage', 'tiny leakage' and 'dangerous leakage' in the plane are obtained; and thirdly, a controller transmits signals of thecorresponding area and the corresponding type to an actuator, and the actuator determines the number of variable-frequency ventilation times according to the signals. The online monitoring and ventilating linkage control method is used for the field of gas monitoring of the comprehensive pipe galleries.

Description

Technical field [0001] The invention belongs to the technical field of public safety, and in particular relates to a method and system for safely handling gas pipeline leakage in a small enclosed space of a comprehensive pipe gallery. Background technique [0002] Since 2013, the State Council has successively issued guidance on the construction of integrated pipeline corridors, and pilot construction of comprehensive pipeline corridors has been started across the country. The development of urban underground comprehensive pipe corridors can efficiently use underground space, while providing sufficient operation and maintenance space for pipeline operation and maintenance, and fundamentally avoid the occurrence of road zipper phenomenon. [0003] Generally, multiple pipelines are laid at the same time in the comprehensive pipeline gallery, including electricity, communication, heating, gas, and sewage pipelines. However, because the gas pipeline is a high-risk pipeline, once a lea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17D5/02F17D5/00
CPCF17D5/005F17D5/02
Inventor 谭羽非王雪梅于克成张金冬
Owner HARBIN INST OF TECH
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