Device and method for automatic tail gas collection in gas calorific value metering system

A metering system, a technology of gas calorific value, applied in the direction of detecting fluid flow by measuring differential pressure, volume/mass flow generated by mechanical effects, etc., can solve the problems of backwardness, inability to meet the rapid development of gas energy, etc., and improve the accuracy of volume measurement Effect

Inactive Publication Date: 2017-04-12
CHINA JILIANG UNIV
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Problems solved by technology

my country is still relatively backward in terms of gas calorific value measurement base standards including natural gas, and the existing gas calorific value measurement system cannot meet the rapid development of gas energy

Method used

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  • Device and method for automatic tail gas collection in gas calorific value metering system
  • Device and method for automatic tail gas collection in gas calorific value metering system
  • Device and method for automatic tail gas collection in gas calorific value metering system

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Embodiment Construction

[0017] Such as figure 1 , figure 2 , image 3 and Figure 4 As shown, the present invention discloses an automatic tail gas collection device in a fuel gas calorific value metering system. The upper end of the piston cylinder 7 is fixed on the plane of the bracket 6 by screws, and the upper end of the plane of the bracket 6 is fixed to the sleeve 3 by screws; it is installed on the piston cylinder 7 One end of the inner piston rod 16 is connected to the piston, and the other end is welded on the connecting plate 5; the two ends of the connecting plate 5 are equipped with guide rods 4, and the magnetic scale reading head 22 is fixed on one side of the connecting plate 5 through the support 24, And the corresponding magnetic strip 25 is pasted on the inner wall of the sleeve 3; the lower end of the ball screw 20 is connected with the piston rod 16, and the other end passes through the sleeve 3 and is connected with the servo motor 1 through the coupling 21, and the ball screw...

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Abstract

The invention discloses a device and a method for automatically collecting tail gas in a gas heat value metering system. The method and the device are characterized in that a piston cylinder is used as a flow metering unit, a buffer box, a flue gas analysis sampling container and a small vacuum pump are respectively arranged at access openings of the piston cylinder via a four-way valve, electromagnetic valves are respectively arranged on gas channels from the four-way valve to the buffer box, the flue gas analysis sampling container and the small vacuum pump, and a motor can be adjusted when rotating by the aid of difference values of a pressure sensor on a gas inlet pipeline and a pressure sensor of a cylinder cover, so that the internal volume of the piston cylinder can be changed. The device and the method have the advantages that the volume of collected tail gas can be detected by the intelligent automatic control device for collecting the tail gas, the volume of the piston cylinder is used as a metering standard of the integral device, displacement of a piston is fed to a control system by the aid of a magnetic grating scale, and accordingly the closed-loop measuring system can be implemented; the device is further provided with pressure sensors and a temperature sensor, accordingly, temperatures and pressures can be compensated for the system, and the volume measurement precision of the device can be greatly improved.

Description

technical field [0001] The invention relates to a tail gas collection device and a corresponding collection method thereof, in particular to a tail gas automatic collection device and method in a fuel gas calorific value measurement system. Background technique [0002] In recent years, the research work on natural gas calorific value measurement has been carried out in many scientific research institutes. Energy measurement reflects the thermal energy of natural gas. As a reasonable and scientific measurement method that can best reflect the characteristics of its fuel, it is used in natural gas trade broadly used. [0003] However, volume measurement is still widely used as the basis for natural gas trade settlement in China. my country is still relatively backward in terms of gas calorific value measurement base standards including natural gas, and the existing gas calorific value measurement system cannot meet the rapid development of gas energy. Contents of the inven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F1/34
Inventor 胡佳成竺林坤李东升
Owner CHINA JILIANG UNIV
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