Heterogeneous condensation gas source system with adjustable granularity, concentration and flow

Abstract

The invention relates to a heterogeneous condensation gas source system with adjustable granularity, concentration and flow. The heterogeneous condensation gas source system comprises a gas pipeline,an aerosol pipeline, a proportional controller, a concentration detector, a mixing pipeline for outputting a condensation gas source, and a control part. The aerosol pipeline comprises a mixing container and a thermostat, monodisperse aerosol enters the mixing container through a flow regulating valve and then is mixed with second input gas in the mixing container, then the temperature is regulated through the thermostat, and the monodisperse aerosol enters the mixing pipeline through the aerosol regulating valve; proper heating temperature values of the gas heater and the thermostat are set to ensure that the temperatures of the gas pipeline and the aerosol pipeline are consistent when the gas pipeline and the aerosol pipeline are mixed; and the flow valve is used for controlling the flowof the monodisperse aerosol entering the mixing container, the concentration detector is arranged on the mixing pipeline, and the proportion controller is used for carrying out adjustment during two-way mixing according to a preset value in order to control the proportion of the monodisperse aerosol in the mixing pipeline.

Description

technical field [0001] The invention relates to a non-homogeneous condensing gas source system with adjustable particle size, concentration and flow rate, which belongs to the technical field of condensation and separation. Background technique [0002] Steam condensation can be divided into two types: homogeneous nucleation and heterogeneous nucleation. After reaching the critical supersaturation state, when the steam contains enough impurities or droplets, the steam molecules will continue to condense on the condensation core, and finally grow into droplets with a certain size, which is heterogeneous nucleation; when the steam When there is no droplet or impurity in the air, the condensation nuclei are formed by the reunion of the vapor molecules themselves, which is called homogeneous nucleation. In most cases, heterogeneous nucleation requires lower steam supersaturation than homogeneous nucleation. In industry, agriculture, and medicine, the heterogeneous nucleation o...

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Problems solved by technology

[0004] The present invention aims at the problems existing in the above-mentioned background technology, based on the heterogeneous condensation theory, cooperates with the experimental pipeline, and improves the adjustment of the core parameters of aerosol condensation. Condensation air source system, to solve the disadvantages of poor practicability, non-adjustable and poor stability of existing air source devices

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