阅读说明：本技术 一种燃气电厂天然气系统的泄露检测方法 (Leakage detection method for natural gas system of gas power plant ) 是由 毕天盛 章恂 谢远宏 陈锦富 于 2020-12-28 设计创作，主要内容包括：本发明涉及一种燃气电厂天然气系统的泄露检测方法,包括如下步骤：第一步,将燃气管道上的接口处的外部套有套管；第二步,套管上设置有出气孔,出气孔上设置有细管道,细管道与可燃气体测量仪连接；第三步,每个细管道均连接一个可燃气体测量仪,每个可燃气体测量仪均与自动控制装置电连接；第四步,自动控制装置与电脑工作站通讯连接。本发明中的检测方法与自动控制装置连接,通过自动控制装置进行自动检测,从而节省人力,并且避免了人工检测带来的一些弊端；通过电脑工作站控制自动控制装置,电脑工作站具有预警功能,从而通过电脑判断是否需要对接口进行维修。采用本发明中的检测方法,检测更加灵活,可以根据需要设置检测的频率。(The invention relates to a leakage detection method of a natural gas system of a gas power plant, which comprises the following steps: firstly, sleeving a sleeve on the outer part of an interface on a gas pipeline; secondly, an air outlet is formed in the sleeve, a thin pipeline is arranged on the air outlet and is connected with a combustible gas measuring instrument; thirdly, each thin pipeline is connected with a combustible gas measuring instrument, and each combustible gas measuring instrument is electrically connected with the automatic control device; and fourthly, the automatic control device is in communication connection with the computer workstation. The detection method is connected with the automatic control device, and automatic detection is carried out through the automatic control device, so that labor is saved, and some defects caused by manual detection are avoided; the automatic control device is controlled by the computer workstation, and the computer workstation has an early warning function, so that whether the interface needs to be maintained or not is judged by the computer. By adopting the detection method, the detection is more flexible, and the detection frequency can be set according to the requirement.)

1. A leakage detection method for a natural gas system of a gas power plant is characterized by comprising the following steps:

firstly, sleeving a sleeve outside an interface on a gas pipeline, and tightly wrapping two ends of the sleeve by using tinfoil paper;

secondly, an air outlet is formed in the sleeve, a thin pipeline is arranged on the air outlet and is connected with a combustible gas measuring instrument;

thirdly, each thin pipeline is connected with a combustible gas measuring instrument, and each combustible gas measuring instrument is electrically connected with the automatic control device;

and fourthly, the automatic control device is in communication connection with a computer workstation, and the computer workstation controls the automatic control device to control the combustible gas measuring instrument to measure the leaked gas, so that manual itinerant measurement is not needed, only computer control is carried out, and automatic measurement is completed.

2. The gas power plant natural gas system leak detection method of claim 1, wherein the shape of the sleeve is the same as the shape of the joint, and the distance between the wall of the sleeve and the joint is 2 mm.

3. A gas power plant natural gas system leak detection method as claimed in claim 1, wherein said combustible gas meter is removably mounted to adjacent piping at the interface to facilitate replacement when a problem occurs with the combustible gas meter.

4. The leakage detection method of the natural gas system of the gas power plant as claimed in claim 1, wherein the computer workstation is provided with an early warning indicator light, when gas leakage is detected, different early warning indications are given according to the detected gas amount, the early warning indicator light corresponding to each gas measuring instrument is green under normal conditions, when trace gas is detected, the early warning indicator light is yellow, and when a large amount of gas is detected, the early warning indicator light is red.

5. The gas power plant natural gas system leak detection method of claim 1, wherein the combustible gas meter is capable of trace detection.

Technical Field

The invention relates to the technical field of natural gas safety production, in particular to a leakage detection method for a natural gas system of a gas power plant.

Background

The natural gas power plant adopts natural gas as energy, has obvious green and low carbon effects, and has little influence on the environment compared with coal-electricity. The natural gas is a general name of mixed gas mainly containing hydrocarbon, has the specific gravity of about 0.65, is lighter than air, has the characteristics of no color and no smell, has the explosion limit of 5-15 percent, is the maximum dangerous source of a natural gas power plant natural gas system, and ensures that the natural gas system is strict and has no leakage, which is the most fundamental precondition for ensuring the natural gas power plant.

The method for measuring the leakage of the natural gas commonly adopted by the natural gas power plant at present comprises the following steps: each flange, interface, etc. of the natural gas system is measured using a combustible gas meter.

For the natural gas that prevents the natural gas system and reveal gathers and arouse fire explosion harm, natural gas power plant generally carries out open-air arrangement with natural gas conveying system, so that the natural gas that reveals can be smooth diffusion to the atmosphere in, use combustible gas measuring apparatu its small volume of revealing to be difficult to be surveyed when measuring open-air natural gas system flange, interface etc. because a small amount of natural gas just is diluted by the air very fast, under windy condition, the natural gas of microleakage is blown away by the wind very easily, lead to combustible gas measuring apparatu can't accurately survey whether there is the natural gas leakage condition in every flange of natural gas system, interface etc..

If the flange or the interface is measured by adopting a manual method, the problem of missing measurement can occur, and the measurement time is uncontrollable. The invention designs a leakage detection method for a natural gas system of a gas power plant.

Disclosure of Invention

In order to solve the problems, the invention discloses a leakage detection method for a natural gas system of a gas power plant

A leakage detection method for a natural gas system of a gas power plant comprises the following steps:

firstly, sleeving a sleeve outside an interface on a gas pipeline, and tightly wrapping two ends of the sleeve by using tinfoil paper;

secondly, an air outlet is formed in the sleeve, a thin pipeline is arranged on the air outlet and is connected with a combustible gas measuring instrument;

thirdly, each thin pipeline is connected with a combustible gas measuring instrument, and each combustible gas measuring instrument is electrically connected with the automatic control device;

and fourthly, the automatic control device is in communication connection with a computer workstation, and the computer workstation controls the automatic control device to control the combustible gas measuring instrument to measure the leaked gas, so that manual itinerant measurement is not needed, only computer control is carried out, and automatic measurement is completed.

Furthermore, the shape of the sleeve is the same as that of the joint, and the distance between the wall of the sleeve and the joint is 2 mm.

Further, the combustible gas measuring instrument detachably install on the adjacent pipeline of kneck, when the combustible gas measuring instrument goes wrong, be convenient for change.

Further, the computer workstation on be equipped with the early warning pilot lamp, when detecting that there is the gas to leak, according to the volume of the gas that detects, make different early warning instructions, the early warning pilot lamp that every combustible gas measurement appearance corresponds under the normal condition is green, when detecting minim, the early warning pilot lamp becomes yellow, when detecting a large amount, the early warning pilot lamp is red.

Furthermore, the combustible gas measuring instrument can realize trace detection.

The invention has the beneficial effects that: the detection method is connected with the automatic control device, and automatic detection is carried out through the automatic control device, so that labor is saved, and some defects caused by manual detection are avoided; the automatic control device is controlled through the computer workstation, and the computer workstation has an early warning function, so that whether the interface needs to be maintained or not is judged through a computer. The detection method is more flexible in detection, and the detection frequency can be set according to the requirement to realize real-time detection.

Drawings

Fig. 1 is a schematic structural diagram of an interface corresponding to a leakage detection method for a natural gas system of a gas power plant in an embodiment of the present invention.

Fig. 2 is a control flow chart of an interface corresponding to a leakage detection method for a natural gas system of a gas power plant in an embodiment of the present invention.

Detailed Description

The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

With reference to the description accompanying figures 1 and 2,

a leakage detection method for a natural gas system of a gas power plant comprises the following steps:

firstly, sleeving a sleeve outside an interface on a gas pipeline, and tightly wrapping two ends of the sleeve by using tinfoil paper;

secondly, an air outlet is formed in the sleeve, a thin pipeline is arranged on the air outlet and is connected with a combustible gas measuring instrument;

thirdly, each thin pipeline is connected with a combustible gas measuring instrument, and each combustible gas measuring instrument is electrically connected with the automatic control device;

and fourthly, the automatic control device is in communication connection with the computer workstation, and the computer workstation controls the automatic control device to control the combustible gas measuring instrument to measure the leaked gas, so that manual itinerant measurement is not needed, only computer control is carried out, and automatic measurement is completed.

Further, the shape of the sleeve is the same as the shape of the joint, and the distance from the sleeve wall to the joint is 2 mm.

Further, the combustible gas measuring instrument is detachably installed on the adjacent pipeline at the interface, and when the combustible gas measuring instrument goes wrong, the combustible gas measuring instrument is convenient to replace.

Further, be equipped with the early warning pilot lamp on the computer workstation, when detecting that there is the gas to leak, according to the volume of the gas that detects, make different early warning instructions, the early warning pilot lamp that every combustible gas measurement appearance corresponds under the normal condition is green, and when detecting the trace, the early warning pilot lamp becomes yellow, and when detecting a large amount of, the early warning pilot lamp is red.

Further, the combustible gas measuring instrument can realize trace detection.

The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features.