Adaptive control system of hot air drying

A self-adaptive control and hot air drying technology, which is applied in the direction of drying solid materials, drying, lighting and heating equipment, etc., can solve the problem of not overcoming the influence of changes in the working conditions of the dryer, the inability to evaluate the control accuracy of the drying process, and the lack of drying process control, etc. question

Inactive Publication Date: 2007-01-31
SOUTH CHINA AGRI UNIV
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Problems solved by technology

As far as drying is concerned, this control method belongs to feedforward control, which cannot overcome the disturbance in the drying process, so it cannot evaluate its control accuracy on the drying process
The other type is a feedback control system that realizes drying control by feeding back the moisture content of the machine material or exhaust parameters, because the control sy

Method used

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  • Adaptive control system of hot air drying

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Embodiment

[0015] Principle frame of the present invention is as figure 1 As shown, it includes a sensor group 1, a material moisture sensor 2, a transmitter 3, an impedance transmitter 4, a controller 6, a frequency converter 9, a discharge device 10, and a host computer 13, among which the sensor group 1 and the material moisture sensor The output signal of 2 is connected with the input terminal of controller 6 through transmitter 3 and impedance transmitter 4 respectively, and the input and output interface of controller 6 and the output and input interface of host computer 13 realize two-way communication through communication interface, control The output interface of the device 6 is connected with the discharge device 10 in the hot air drying heat exchange chamber through the frequency converter 9 . In this embodiment, the sensor group 1 includes a drying temperature detection sensor, an ambient temperature detection sensor, a humidity detection sensor, a wind pressure detection se...

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Abstract

The invention relates to a kind of hot-wind desiccation controlling system. It includes a sensor group(1), a water sensor of the material(2), a transducer(3), a impedance transducer(4), a controller(6),a converter(9),a blowdown device(10) and a superior computer(13). The output signal of the sensor group(1) and the water sensor of the material(2) connect with the input end of the controller(6) individually through the transducer(3) and the impedance transducer(4). The input and the output interface of the controller (6) and the output and the input interface of the superior computer (13) realize the two-direction communication through the communication interface. The output interface of the controller (6) connects with the blowdown device (10) of the hot-wind desiccation chamber through the converter (9). The input quantity and the change rule of the system is not predefined but determined real time by the superior computer according to the online measuring value. It can save the energy loss, increase the desiccation efficiency and security and improve the hot-wind desiccation quality farthest as the character of the material in desiccation.

Description

Technical field: [0001] The invention relates to a hot air drying control system, in particular to a hot air drying self-adaptive control system, which belongs to the transformation technology of the hot air drying control system. Background technique: [0002] Hot air drying equipment has various types such as flat bed type, tower type, warehouse type, and circulation type. Various types of dryers have been formed due to different drying processes or processing methods. There are roughly two types of control schemes used by various types of dryers. One is to control the air inlet conditions (such as temperature, humidity, and air volume), and use the maximum safety limit value of the material during the entire drying process to limit the hot air at the inlet. physical parameters. As far as drying is concerned, this control method belongs to feed-forward control, which cannot overcome the disturbance in the drying process, so its control accuracy on the drying process cann...

Claims

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Application Information

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IPC IPC(8): F26B25/22
Inventor 李长友班华
Owner SOUTH CHINA AGRI UNIV
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