A self-adaptive energy-saving control method for material drying characteristics

Abstract

The invention belongs to the technical field of drying methods. Solve the problems of whether the drying capacity matches the moisture evaporation capacity of the material, high energy consumption, and difficult control of empirical data and control parameters. The self-adaptive energy-saving control method of material drying characteristics is to pass dry gas into the air inlet of the drying box, set the time period, measure the temperature and humidity of the dry gas and exhaust gas in each time period, and calculate the moisture content of the exhaust gas and dry gas If the temperature of the drying gas in the previous time period is higher than that of the previous one, the humidity difference of the drying gas in this time period is higher than that of the previous one. increase or decrease, the drying gas temperature in the next time period will continue to increase or decrease. If the drying gas temperature in the previous time period is lower than that of the previous one, and the moisture content difference of the drying gas in this time period is higher or lower than that in the previous time period, then the drying gas temperature in the next time period will continue to decrease or increase.

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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