A general diluting method and a general diluting device

Abstract

The invention relates to a general diluting method and a general diluting device. The method includes extracting a dynamic fluid from a diluting fluid source through a power pump, adjusting the flow rate of the extracted dynamic fluid through a dynamic flow rate adjusting valve, filtering to remove impurities in the dynamic fluid through an efficient filter to form a clean fluid, injecting the clean fluid into a Venturi ejector through a dynamic inlet, allowing the clean fluid to flow through a part near a suction inlet of the Venturi ejector to form negative pressure in the suction inlet, allowing a fluid to be diluted to be inhaled through the suction inlet of the Venturi ejector, adjusting the flow rate of the fluid to be diluted which is inhaled from a source of the fluid to be diluted through a suction flow rate adjusting valve, allowing the fluid to be diluted and the clean fluid to be mixed efficiently in the Venturi ejector to obtain a mixed and diluted fluid, ejecting the mixed and diluted fluid from a dynamic outlet, feeding the mixed and diluted fluid from the dynamic outlet of the Venturi ejector to a buffer to release pressure, and sampling through a sampling port of the buffer. The method and the device can be widely applied in the fields of high-concentration fluid source monitoring, preparation of calibration fluids with given concentrations, dilution of expensive fluids, and the like.

Description

technical field [0001] The invention relates to a universal dilution method which can adjust the dilution ratio arbitrarily and an aerosol dilution device based on the method. Background technique [0002] Dilution device is a pre-processing device widely used in laboratory and on-site sampling monitoring. This device dilutes high-concentration sampling gas or standard gas to the most sensitive and precise concentration range for instrument operation. Its application areas include: [0003] Calibrate gas analyzers, such as gas chromatography, gas sensors, gas alarms, etc.; [0004] Simulated gas environment, used for simulation experiments of harmful gases, explosion-proof, air pollution, etc.; [0005] Standard equipment for dynamic calibration of ambient air monitoring instruments; [0006] Use a minimum of expensive multi-component gas cylinders to prepare a variety of standard gas mixtures with different concentrations. [0007] At present, the dilution device genera...

AI Technical Summary

Problems solved by technology

It is necessary to use multiple precise mass flow controllers to precisely control the flow of sample gas and diluent gas. It is also necessary to design a gas buffer tank to buffer and mix the diluent gas. For applications with high requirements for dilution uniformity, sometimes two or more stages are required. Level gas distribution design, not only high cost, but also complex structure, taking up a lot of space

In particular, in the on-line monitoring test research of harmful gases, explosion-proof, pollution sources, etc., due to space and place and safety considerations, the use of this gas distribution device is limited

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