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Dilution heating type particulate matter constant-speed sampling device with temperature compensation function

A technology of temperature compensation and constant velocity sampling, which is applied in the direction of sampling devices, sampling and measuring devices, etc., and can solve problems such as errors

Inactive Publication Date: 2021-04-06
NANJING BORY AUTOMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such sampling error cannot be compensated, and it will cause error problems for subsequent data measurement

Method used

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  • Dilution heating type particulate matter constant-speed sampling device with temperature compensation function

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Embodiment 1

[0064] see figure 1 , An embodiment provided by the present invention: a kind of dilution heating type particulate matter isokinetic sampling device with temperature compensation, including flue gas sampler, dilution gas mechanism, mixed gas mechanism, extraction power source and extraction controller. The flue gas sampler is composed of a flue gas sampling tube, a flue gas flow rate meter and a flue gas temperature meter; the dilution gas mechanism is composed of a dilution gas flow rate meter, a dilution gas temperature meter, a dilution gas source and a dilution gas controller. Other gases used to dilute the sample gas, such as nitrogen, air, etc., can use compressed gas or an air pump; the mixed gas mechanism is composed of a mixed gas flow rate meter and a mixed gas temperature meter; the particle monitor is installed in the measurement room; the extraction power source is used for The equipment for extracting the sample gas to generate the extraction power can be an air ...

Embodiment 2

[0070] An embodiment provided by the present invention: a diluted heating type particulate matter constant-velocity sampling device with temperature compensation, the extraction power source is deduced by the formula of an air pump:

[0071] The mass of the gas remains unchanged when the temperature and volume change, so it can be obtained,

[0072] Formula 1: m2=m1+mx

[0073] m2—mass of mixed gas, m1—mass of sample gas, mx—mass of diluent gas;

[0074] The pressure of flue gas, sample gas, and mixed gas is the same during constant velocity sampling, and the universal formula calculated according to gas quality: m=p×v×M÷[8.314×(273+t)]

[0075] M—mass of gas, p—pressure of gas, v—volume of gas, M—molar mass of gas, t—temperature of gas in °C;

[0076] Equation 2 is derived:

[0077] v2—volume of mixed gas, v1—volume of sample gas, vx—volume of diluted gas, t2—temperature of mixed gas in °C, t1—temperature of sample gas in °C, tx—temperature of diluted gas in °C;

[0078...

Embodiment 3

[0082] An embodiment provided by the present invention: a dilution heating type constant velocity sampling device with temperature compensation, when the extraction power source is a jet pump, according to the performance of the jet pump, the quasi-two-dimensional theoretical calculation formula is combined with a certain mass The ideal gas state equation is:

[0083] The mass of the gas remains unchanged when the temperature and volume change, so it can be obtained,

[0084] Formula 4: m2=m1+mx

[0085] m2—mass of mixed gas, m1—mass of sample gas, mx—mass of diluent gas;

[0086] The pressure of flue gas, sample gas, and mixed gas is the same during constant velocity sampling, and the universal formula calculated according to gas quality: m=p×v×M÷[8.314×(273+t)]

[0087] m—mass of gas, p—pressure of gas, v—volume of gas, M—molar mass of gas, t—temperature of gas in °C;

[0088] Equation 5 is derived:

[0089] v2—volume of mixed gas, v1—volume of sample gas, vx—volume of...

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Abstract

The invention discloses a dilution heating type particulate matter constant-speed sampling device with a temperature compensation function. The dilution heating type particulate matter constant-speed sampling device comprises a flue gas sampler, a diluent gas mechanism, a mixed gas mechanism, an extraction power source and an extraction controller. The flue gas sampler consists of a flue gas sampling pipe, a flue gas flow meter and a flue gas temperature meter; the diluent gas mechanism is composed of a diluent gas flow meter, a diluent gas temperature meter, a diluent gas source and a diluent gas controller, the diluent gas source is other gases such as nitrogen and air for diluting the sample gas, and compressed gas or a gas pump can be used; the mixed gas mechanism consists of a mixed gas flow meter and a mixed gas temperature meter; the particulate matter monitor is mounted in the measuring chamber; the extraction power source is equipment used for extracting sample gas and generating extraction power, and can be an extraction pump, a jet pump and the like; and the extraction controller is equipment for controlling sample gas extraction. The device has the advantages that the flue gas temperature, the diluent gas temperature and the mixed gas temperature are measured, compensation calculation is carried out according to the temperatures to obtain the flow velocity of the mixed gas needing to be extracted finally, and the extraction controller and the dilution controller are controlled to complete constant-speed tracking sampling according to the data.

Description

technical field [0001] The invention relates to the technical field of flue gas monitoring, in particular to a dilution heating type particulate matter isokinetic sampling device with temperature compensation. Background technique [0002] The flue gas sampler is a common device on the market at present. It is a device that extracts the flue gas in the flue for particle measurement through a probe inserted into the flue and equipped with a power device. Since the humidity of the flue gas in the flue is very high, in order to eliminate the influence of liquid water on the particle measurement and accurately measure the concentration of the particle, the humidity of the sample gas must be reduced. The liquid water is reduced to a gaseous state, so that the real particles in the gas can be measured by the particle detection instrument. At present, the heating method or dilution method is mainly used to reduce the humidity of the measured sample gas, and with the corresponding ...

Claims

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Application Information

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IPC IPC(8): G01N1/24G01N1/38G01N15/06
CPCG01N1/2258G01N1/38G01N15/06G01N2001/2264
Inventor 杜煜马博程
Owner NANJING BORY AUTOMATION TECH CO LTD
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