A temperature and humidity controllable droplet evaporation experiment device and a temperature and humidity adjusting method thereof

By designing a droplet evaporation experimental device with controllable temperature and humidity and a temperature and humidity adjustment method, the problem of simulating the humidity of salt lake brine was solved, and a high-precision droplet evaporation experiment was achieved, providing a reliable experimental basis for optimizing the salt lake brine concentration process.

CN122377142APending Publication Date: 2026-07-14XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XI AN JIAOTONG UNIV
Filing Date
2026-04-09
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing experimental equipment cannot accurately simulate the humidity environment under the high salinity characteristics of salt lake brine, resulting in a large deviation between experimental data and industrial reality, and thus failing to provide reliable support for optimizing the salt lake brine concentration process.

Method used

A droplet evaporation experimental device with controllable temperature and humidity was designed. Through the gas path system and data acquisition and recording system, the airflow humidity can be precisely controlled. The semi-open structure facilitates droplet suspension and replacement. Combined with temperature and humidity adjustment methods, the droplets are ensured to evaporate at the target temperature and humidity.

Benefits of technology

The study achieved uniformity and measurement accuracy in the droplet evaporation process, providing high-precision experimental data support and laying the foundation for the establishment of a single-droplet evaporation model for brine.

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Abstract

This invention discloses a controllable temperature and humidity droplet evaporation experimental device and its temperature and humidity regulation method, belonging to the technical field of precision experimental instruments for complex multiphase flow systems and solution microphase change thermal physics. The device includes a gas path system, a semi-open pneumatic evaporation chamber, a precision micro-area droplet suspension device, and a multi-channel photoelectric heterogeneous data acquisition and recording system. The gas path system is used for environmental reconstruction, and the micro-area droplet suspension device is placed in the semi-open pneumatic evaporation chamber to resist interference. The temperature and humidity regulation method adopts a thermodynamic state feedforward decoupling control path: based on the preset target temperature and humidity, the saturated air dew point temperature corresponding to the target absolute moisture content is calculated in reverse; after the forced airflow reaches a high humidity state through a mixing humidification device, it is introduced into a refrigeration dehumidification device for forced cooling to the dew point temperature, causing water exceeding the saturated moisture content to condense and precipitate, thus locking the absolute moisture content of the airflow; then, the airflow is heated to the target dry-bulb ambient temperature by a gas heater. This invention also utilizes a high-speed orthogonal dual-camera array to capture the minute elastic deflection displacement of the metal suspension wire through machine vision algorithms, and non-contactly inverts the droplet mass decay data. This invention overcomes the shortcomings of traditional humidity feedback regulation, such as lag, spatial stratification, and waste gas accumulation in closed chambers. It can achieve high-precision in-situ synchronous measurement of multiple parameters, such as mass loss rate, phase change temperature, and micromorphology, of a single droplet of a complex solution during its entire evaporation life cycle under stable convective boundary conditions. This provides a high-end experimental platform to support CFD simulation modeling of spray drying and concentration theory.
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