Metered system for automatically capturing fluid flux

Abstract

The invention discloses a fluid flow auto acquisition metering system, comprising a control center station, a remote control unit and a communication network. The invented fluid flow auto acquisition metering system is provided with advantages of high metering accuracy, strong function, low power consumption, strong anti-interference ability and convenient operation, and can be used widely for flow metering of water, aqueous vapour, and sewage in industry of petroleum, natural gas, chemical industry, electric power and metallurgy. Metering performance stability of in-line meter is assured to implement office automation.

Description

technical field [0001] The invention belongs to the technical field of energy applications, and in particular relates to an automatic flow collection and metering system for fluids such as water, water vapor, and sewage in industries such as petroleum, natural gas, chemical industry, electric power, and metallurgy. Background technique [0002] In recent years, with the completion of long-distance natural gas pipelines such as Shaanxi-Beijing and West-East Gas Transmission, the application of natural gas in my country has become more and more extensive. The accuracy and reliability of its measurement are directly related to the economic interests of both supply and demand. [0003] According to the "Measurement Law" and the requirements of the flowmeter verification regulations, the accuracy of the flowmeter in the custody transfer measurement of the natural gas long-distance pipeline must be regularly verified and calibrated. Currently, the most widely used verification meth...

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Problems solved by technology

It is only suitable for orifice plates, nozzles and Venturi flowmeters, and the verification accuracy is low, and it is impossible to qualitatively or quantitatively grasp the errors of the tested flowmeters, directly calibrate or assign values ​​to flowmeters, and cannot eliminate additional errors such as installation.

[0005] At present, the following problems generally exist in domestic natural gas flow measurement: 1. Most of the eight physical parameters that affect natural gas flow are three-parameter single methods, and the resulting calculation error is at most about 0.01%; 2. Only natural gas components are considered Several parameters such as methane, nitrogen, carbon dioxide and their relative density; 3. Mass measurement and energy measurement are not introduced; 4. Most of them use a single meter, and there is no verification system. During the online measurement process, there is a large deviation in measurement performance ;5. Most of them use software configuration to realize online measurement. There is no professional measurement calculation module and function, and the complex processing ability for measurement results is relatively weak.

[0006] To sum up, there are many domestic flowmeter manufacturers, lack of flow calculation principles and on-site practical experience, the level of research and development technology is different, or the user sets parameters improperly, resulting in flow measurement inaccuracy sometimes as high as 10%. The environment is different, the flow rate cannot be reproduced, and it takes a long time for the measurement system to be verified by the legal metrology institution, resulting in immeasurable economic losses

The natural gas flow metering management system has been widely used in the natural gas flow metering of various metering stations in various industries, but the use of conventional metering systems is relatively scattered, and it is difficult to maintain and manage the system

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