Constituent analyzer adopting negative pressure balancing gas collecting mode

Abstract

An elemental analyzer whose operation is in the way of subpressure balanced gas collection is provided, which comprises a control mechanism, a furnace body, a sample transfer mechanism as well as a filtering apparatus, a gas-collecting cylinder, an analysis pool and a pump fixed on the base plate. The furnace body is equipped with a combustion tube whose tail end is connected with the filtering apparatus. The entry of the furnace body is mounted with a sample transfer nozzle connected with an oxygen cylinder connecting with the sample transfer mechanism. The pipeline between the filtering apparatus and the gas-collecting cylinder is provided with a first; the pipeline between the gas-collecting cylinder and the analysis pool is equipped with a third solenoid pilot actuated valve; the bi-directional between the gas-collecting cylinder and the pump are respectively equipped with the fourth solenoid pilot actuated valve and the fifth solenoid pilot actuated valve. The fourth and the fifth solenoid pilot actuated valves can be conducted with the air, the gas-collecting cylinder and the pump. The invention has the advantages of simple and compact structure and practical use, which can improve the working stability and the testing accuracy as well as effectively lower the running cost.

Description

technical field [0001] The invention mainly relates to the field of measuring instruments for analyzing the element content of combustible substances, in particular to an elemental analyzer adopting a negative pressure balance gas collection method. Background technique [0002] Except for some mineral impurities and water, the combustible substances are all organic substances. Organic substances in coal are mainly composed of five elements such as carbon, hydrogen, oxygen, nitrogen, and sulfur. They are one of the indicators for scientific classification of coal, and can also be used to calculate the calorific value of coal, estimate and predict the low-temperature dry distillation products of coal , is the basic basis for evaluating the quality of combustibles. All measuring instruments that analyze the content of these five main elements in combustible substances are collectively called elemental analyzers. [0003] Although there are many types of elemental analyzers, ...

AI Technical Summary

Problems solved by technology

High-pressure gas must put forward higher requirements on the airtightness of the entire pipeline during the flow process, otherwise it will easily cause air leakage, increase oxygen consumption, and increase the operating cost of the instrument; Insufficient oxygen supply will cause insufficient combustion of the sample and affect the experimental results

In addition, when emptying the residual gas in the gas collection cylinder, it is necessary to provide a gas source with a certain pressure from the gas cylinder to push the piston to move. There is an additional gas consumption point, which doubles the gas consumption of the instrument, which is not economical and practical.

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