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Metering device and metering method of laboratory trace gases

A technology of trace gas and metering device, applied in the direction of measurement device, volume measurement instrument/method, measurement capacity, etc., can solve the problems affecting experimental accuracy, large range of instruments, batch use, etc., and achieves low cost, strong applicability, and production. Easy to install effect

Inactive Publication Date: 2014-03-26
AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are mainly two methods for measuring the gas production of anaerobic digestion and fermentation equipment in the laboratory. One is the wet gas flow meter, which has a large range and has large errors when measuring trace gases on a laboratory scale, which affects the accuracy of the experiment; It is directly measured by a trace gas flowmeter. This imported instrument is expensive and generally cannot be used in batches in the laboratory.

Method used

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  • Metering device and metering method of laboratory trace gases
  • Metering device and metering method of laboratory trace gases
  • Metering device and metering method of laboratory trace gases

Examples

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Effect test

Embodiment 1

[0027] A laboratory trace gas metering device, such as figure 1 As shown, it is composed of a gas purification unit, a metering collection unit and a control unit. The gas purification unit includes an inlet pipe 1, a drying column 2, a desulfurization column 4, and an intake solenoid valve 6, which are connected in series through pipelines. The drying column 2 and the desulfurization column 4 are connected in series. Both are plexiglass round tubes, with an air inlet and an air outlet at the bottom and top respectively, the drying column 2 is filled with a desiccant 3, and the desulfurization column 4 is filled with a desulfurizing agent 5; the metering and collecting unit includes a U-shaped metering tube 8, constant temperature water Bath 21, gas outlet solenoid valve 14, gas outlet solenoid valve outlet pipe 15 and gas collection bag 16, one end of U-shaped metering pipe 8 is respectively provided with U-shaped metering pipe inlet pipe 7 and U-shaped metering pipe outlet p...

Embodiment 2

[0035] A laboratory trace gas metering device, which is basically the same as that of Embodiment 1, the differences are as follows.

[0036] The device measures the amount of methane gas accumulated in the 5L anaerobic digestion reactor during the anaerobic digestion process of agricultural waste and draws the methane production rate curve. The desiccant is silica gel, the desulfurizer is granular activated carbon, and the metering liquid is 4mol / L% The NaOH solution, implementation method is as follows:

[0037] 1) Operation process: The biogas produced by the experimental reactor passes through the drying device 2 filled with calcium sulfate and the desulfurization device 4 filled with iron oxide to remove water vapor and hydrogen sulfide in the gas. At this time, the electric intake valve 6 is opened, and the solenoid valve 14 is closed. The purified gas enters the U-shaped metering tube 8 with a working scale of 25ml and filled with 4mol / L NaOH solution through the inlet ele...

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Abstract

The invention relates to a metering device of laboratory trace gases. The metering device is composed of a gas purifying unit, a metering and collecting unit and a control unit. The gas purifying device comprises a gas inlet pipe, a drying pillar, a desulfurization pillar and a gas inlet electromagnetic valve. The drying pillar is filled with drying agents and the desulfurization pillar is filled with desulfurization agents. The metering and collecting unit comprises a U-shaped metering tube, a constant-temperature water bathing groove, a gas outlet electromagnetic valve, a gas outlet electromagnetic valve outlet pipe and a gas collecting bag. Metering liquid is put in the U-shaped metering tube which is arranged in the constant-temperature water bathing groove. The control unit comprises a liquid level control device, a gas inlet electromagnetic valve control switch, a gas outlet electromagnetic valve control switch, an electronic reader and a power supply. The metering device of laboratory trace gases has the advantages of being simple in structure, convenient to manufacture and install, low in manufacturing cost, easy to implement, high in accuracy of the metering method, high in applicability, capable of accurately measuring the total gas generation amount and the target gas amount, capable of measuring the speed of gases and capable of totally meeting the laboratory study requirements.

Description

technical field [0001] The invention relates to the technical field of anaerobic digestion treatment of waste, in particular to a metering device and a metering method for laboratory trace gases. Background technique [0002] When anaerobic digestion technology is used to treat organic waste or high-concentration organic wastewater, the biogas or methane produced is a kind of clean energy, and the amount of biogas or methane produced and the composition of biogas are the key factors for evaluating the advantages and disadvantages of anaerobic digestion equipment and treatment processes. key parameter. At present, there are mainly two methods for measuring the gas production of anaerobic digestion and fermentation equipment in the laboratory. One is the wet gas flow meter, which has a large range and has large errors when measuring trace gases on a laboratory scale, which affects the accuracy of the experiment; It is directly measured by a trace gas flowmeter. This imported...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F22/02
Inventor 杜连柱张克强黄治平杨鹏梁军锋
Owner AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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