Adaptive energy-saving control method for drying characteristics of materials

Abstract

The invention belongs to the technical field of drying methods, and relates to an adaptive energy-saving control method for drying characteristics of materials. The problems that the drying ability is not matched with the water evaporation ability of the materials, energy consumption is high, and experience data and control parameters are difficult to control are solved. The adaptive energy-saving control method for the drying characteristics of the materials comprises the following steps of feeding dry gas in an air inlet of a drying box; setting time periods; measuring the temperature and the humidity of the dry gas and the temperature and the humidity of discharged gas in the different time periods; and calculating the difference between the moisture content of the discharged gas and the moisture content of the dry gas. The temperature of the dry gas in the time periods is changed according to the following conditions that the constant humidity is not changed, if the temperature of the dry gas in a previous time period is increased relative to the temperature of the dry gas in a time period before the previous time period, the difference of the moisture content of the dry gas in a current time period is increased or reduced relative to the difference of the moisture content of the dry gas in the previous time period, and the temperature of the dry gas in a next time period continues being increased or reduced; and if the temperature of the dry gas in the previous time period is reduced relative to the temperature of the dry gas in the time period before the previous time period, the difference of the moisture content of the dry gas in the current time period is increased or reduced relative to the difference of the moisture content of the dry gas in the precious time period, and the temperature of the dry gas in the next time period continues being reduced or increased.

Description

technical field [0001] The invention belongs to the technical field of a drying oven or a drying room with heating or ventilation equipment and a method for drying materials or products by flowing gas on or around them. Background technique [0002] Material drying is achieved by passing dry gas into the drying box where the material is placed. The dry gas that passes through has a certain temperature and humidity, and the gas that is discharged also has a certain temperature and humidity. At present, thermal drying only uses one of the temperature points of the drying gas or exhaust gas as a control element, such as the temperature of the drying gas. There is also the use of one of the temperature and humidity points of the dry gas or exhaust gas as a control element at the same time, such as the temperature and humidity of the dry gas. However, the control parameters are set manually and are fixed within the set period of time. There are at least three deficiencies in t...

AI Technical Summary

Problems solved by technology

However, the control parameters are set manually and are fixed within the set period

There are at least three deficiencies in this method of setting control parameters: ① It requires a lot of empirical data and process tests to summarize the control parameters; ② The control parameters themselves may not be the best match with the drying characteristics of materials; There is no real-time monitoring of whether the drying capacity of the air matches the moisture evaporation capacity of the material, and the phenomenon of high drying energy consumption is prone to occur

This control method usually requires a lot of manpower and material resources to solidify the control parameters. Even so, it is difficult to meet the energy-saving requirements of some materials with a large amount of dehydration and a wide range of temperature and humidity.

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