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System calibration method of gas flowmeter

A technology of gas flowmeter and calibration method, which is applied in the direction of liquid/fluid solid measurement, test/calibration device, measurement device, etc., and can solve the problems that the detection accuracy cannot be guaranteed.

Inactive Publication Date: 2017-12-01
BEIJING SHOUGANG AUTOMATION INFORMATION TECH
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Problems solved by technology

Affected by the accuracy of the process parameters provided by the company and the installation environment such as the length of the straight pipe section, the smoothness of the inner wall of the pipe, etc.; at the same time, due to the errors in the design, transportation, and installation links, the detection accuracy of the entire system cannot be guaranteed

Method used

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  • System calibration method of gas flowmeter

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Embodiment Construction

[0021] Specific implementation examples

[0022] Taking the gas flow meter of the hydrogen flow rate of our company as an example, the specific implementation method is stated, and the specific calibration steps are as follows:

[0023] 1. Choose a 0.05-level digital high-precision standard pressure gauge to replace the original storage tank gas capacity pressure gauge.

[0024] 2. Inflate the gas tank and the pipe network. When the pressure P of the gas tank rises to the maximum working pressure Pmax, the two-position valve for supplying gas to the pipe network will be closed; at the same time, record the pressure value of the gas tank Pmax and the value of the calibrated gas flow accumulator value at this time. In this implementation case, the pressure value of the gas tank is Pmax=1.5MPa, and the measured value Q1 of the calibrated gas flow accumulator=15536.6Nm 3 .

[0025] 3. The stored gas of the total gas capacity starts to supply gas to the user. When the pressure o...

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Abstract

The invention relates to a system calibration method of a gas flowmeter and belongs to the technical field of energy gas metering of metallurgy and chemical enterprises. The method is characterized in that the existing energy medium pipeline network, storage tank gas capacitor and related metering equipment resources of the enterprises are utilized to calibrate the online gas flowmeter and correct the system errors of flow metering; the method relates to equipment such as an enterprise energy gas main pipeline, a gas supply two-position valve for the pipeline network, the storage tank gas capacitor, a storage tank gas capacitor standard pressure gauge, a gas conveying pressure reducing valve group, a temperature correction gauge for the to-be-calibrated gas flowmeter, a pressure correction gauge for the to-be-calibrated gas flowmeter, a primary differential pressure gauge for the to-be-calibrated gas flowmeter, a secondary flow accumulator for the to-be-calibrated gas flowmeter and a user check valve. By the method, errors of throttling device design and mounting links can be effectively overcome, the system errors of energy gas online metering are quantified and corrected, and metering data accuracy and reliability are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of energy gas metering in metallurgy and chemical enterprises. Utilize the company's existing energy medium pipe network, storage tank gas capacity and related metering equipment resources to calibrate the online gas flowmeter and correct the system error of flow metering, which can be widely used in the calibration of energy gas meters in metallurgical and chemical enterprises . Background technique [0002] The energy gas flow measurement and detection system usually consists of a throttling device, a primary differential pressure gauge, a temperature correction gauge, a pressure correction gauge, and a secondary flow accumulator. Due to the design error and installation error of the throttling device, as well as the influence of measurement errors in the primary differential pressure gauge, temperature correction table, pressure correction table, and secondary flow accumulator, the system error of gas fl...

Claims

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Application Information

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IPC IPC(8): G01F25/00
CPCG01F25/15
Inventor 韩占春畅晓光王春燕徐锦垒沈志勇赵广恩
Owner BEIJING SHOUGANG AUTOMATION INFORMATION TECH
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