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A fully automatic sampling method

A fully automatic, sampling tube technology, applied in sampling, sampling devices, instruments, etc., can solve problems affecting the accuracy of gas analysis, affecting sampling efficiency, sampling sample distortion, etc., to ensure sampling stability, improve sampling efficiency, and ensure filtration effect of effect

Active Publication Date: 2019-03-22
成都市倍诚分析技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The gas sampling method disclosed in this patent document does not have backflushing. When the sampling probe works for a long time, the pipeline is easily blocked by dust, resulting in poor sampling stability and affecting sampling efficiency; moreover, the moisture in the sample gas is easy to condense, resulting in Distortion, which affects the accuracy of gas analysis

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A fully automatic sampling method comprising the steps of:

[0048] a. Insert the filter of the automatic sampling device into the industrial pipeline to be sampled;

[0049] b. Close the blowback solenoid valve 11 through the PLC controller, pass instrument air or nitrogen into the thermal bath thermostat of the automatic sampling device, and turn on the electric heater 2; open the needle valve 13, and discharge the heated gas through the vent pipe 12 instrument air or nitrogen;

[0050] c. The sample gas in the industrial pipeline to be sampled enters the sampling pipe 8 after being filtered by a filter, and the sampling solenoid valve 9 is opened by the PLC controller to take out the sample gas;

[0051] d. After taking out the sample gas, open the backflush solenoid valve 11 through the PLC controller and close the sampling solenoid valve 9, and perform backflush cleaning on the filter with instrument air or nitrogen.

[0052] This embodiment is the most basic imp...

Embodiment 2

[0054] A fully automatic sampling method comprising the steps of:

[0055] a. Insert the filter of the automatic sampling device into the industrial pipeline to be sampled;

[0056] b. Close the blowback solenoid valve 11 through the PLC controller, pass instrument air or nitrogen into the thermal bath thermostat of the automatic sampling device, and turn on the electric heater 2; open the needle valve 13, and discharge the heated gas through the vent pipe 12 instrument air or nitrogen;

[0057] c. The sample gas in the industrial pipeline to be sampled enters the sampling pipe 8 after being filtered by a filter, and the sampling solenoid valve 9 is opened by the PLC controller to take out the sample gas;

[0058] d. After taking out the sample gas, open the backflush solenoid valve 11 through the PLC controller and close the sampling solenoid valve 9, and perform backflush cleaning on the filter with instrument air or nitrogen.

[0059] In the step b, the heating temperatur...

Embodiment 3

[0063] A fully automatic sampling method comprising the steps of:

[0064] a. Insert the filter of the automatic sampling device into the industrial pipeline to be sampled;

[0065] b. Close the blowback solenoid valve 11 through the PLC controller, pass instrument air or nitrogen into the thermal bath thermostat of the automatic sampling device, and turn on the electric heater 2; open the needle valve 13, and discharge the heated gas through the vent pipe 12 instrument air or nitrogen;

[0066] c. The sample gas in the industrial pipeline to be sampled enters the sampling pipe 8 after being filtered by a filter, and the sampling solenoid valve 9 is opened by the PLC controller to take out the sample gas;

[0067] d. After taking out the sample gas, open the backflush solenoid valve 11 through the PLC controller and close the sampling solenoid valve 9, and perform backflush cleaning on the filter with instrument air or nitrogen.

[0068] In the step b, the heating temperatur...

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Abstract

The invention discloses a full-automatic sampling method and belongs to the technical field of gas analysis. The method comprises the following steps: a, allowing a filter of a full-automatic sampling device to stretch into a to-be-sampled industrial pipeline; b, closing a blowback solenoid valve by virtue of a PLC (Programmable Logic Controller), introducing instrument air or nitrogen into a heating bath thermostat, and opening an electric heater; opening a needle valve, and discharging the heated instrument air or nitrogen by virtue of a blow-down pipe; c, filtering the sample gas by a filter, allowing the sample gas to enter a sampling pipe, and opening a sampling solenoid valve to take sample gas by virtue of the PLC; and d, opening the blowback solenoid valve and closing the sampling solenoid valve by virtue of the PLC after the sample gas is taken out, and performing blowback cleaning on the filter by using the instrument air or nitrogen. According to the sampling method disclosed by the invention, a heat balance can be maintained by the heating bath thermostat, so that the sample gas is always positioned at a relatively high temperature, the sample gas is kept undistorted, the sampling stability is guaranteed, the sampling efficiency is improved, and the subsequent gas analysis precision is further improved.

Description

technical field [0001] The invention relates to the technical field of gas analysis, in particular to a fully automatic sampling method suitable for continuous sampling of post-combustion industrial flue gas, kiln gas, blast furnace gas, open hearth furnace top blowing gas, metallurgical furnace gas and waste gas from waste incineration method. Background technique [0002] As the sample gas processing technology becomes more and more mature, in recent years, the development of online gas analysis is also getting faster and faster. On-line gas analysis is widely used in industries such as petroleum, chemical industry, building materials, metallurgy, pharmaceuticals, food, energy, energy conservation, environmental protection, and resource development. And production capacity, quality control, promotion of technological transformation and other aspects have made great contributions. [0003] The core component in online gas analysis is the sample gas processing system. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/22
CPCG01N1/2205
Inventor 魏闻魏东魏正森
Owner 成都市倍诚分析技术有限公司
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