Tea is a widely consumed beverage with certain health functions and cultural value. Tea drying is one of the important links in tea processing, which is directly related to the quality and taste of tea. With the continuous development and progress of social science and technology, the automated control technology of tea drying line has become the main trend of tea processing enterprises. In this article, we will introduce in detail the automated control process of the tea drying line.

1. Basic process of tea drying process

Tea drying is an important part of tea processing. The process flow is as follows:

Killing: The picked fresh leaves are subjected to high temperature treatment to dehydrate them and stop the action of enzymes.

Rolling: Put the cured leaves into a rolling machine, and break the leaf cells through mechanical rolling to release the tea juice.

Fermentation: Put the rolled leaves into a fermentation room and ferment them under certain humidity and temperature conditions.

Drying: Dry the fermented leaves to reduce their water content and meet the standards for storage and drinking.

2. Problems in the traditional tea drying process

The traditional tea drying process uses manual operation, which has the following problems:

Manual operation is inefficient: The traditional tea drying process requires manual control of temperature, humidity, heat and other parameters, and requires constant adjustment, making manual operation inefficient.

Unable to guarantee drying quality: The traditional tea drying process requires manual control of temperature, humidity, heat and other parameters. Improper operation can easily lead to unstable drying quality.

Manual operation poses safety risks: The traditional tea drying process requires manual operation of the oven, which poses safety risks such as burns and explosions.

3. Basic principles of automatic control technology of tea drying line

The automated control process of the tea drying line adopts a modern control system to achieve intelligent control. The control system needs to obtain data through temperature and humidity sensors, process and analyze it, so as to realize intelligent tea production.

Drying process control. Common control systems include microcontroller control systems, PLC control systems, computer control systems, etc.

In the automated control process of the tea drying line, the control system needs to realize constant temperature and humidity control of the tea, as well as uniform control of the entire process. Therefore, it is necessary to use a PID digital display control table to control changes in temperature and humidity. The PID digital display control table is a temperature and humidity controller based on the PID algorithm, which can accurately control the temperature and humidity during the tea drying process.

In the control system, multiple sensors are needed to monitor and control the tea drying process. Common sensors include temperature and humidity sensors, oxygen sensors, CO2 sensors, air flow sensors, etc. These sensors can collect various parameter data during the tea drying process in real time and transmit the data to the control system for analysis and processing.

The control system also needs to be equipped with a variety of actuators to control all aspects of the tea drying line. For example, a motor controller can be used to control the rotation speed and steering, a cylinder controller can be used to control the lifting, forward and backward movement of the conveyor belt, and a solenoid valve controller can be used to control the flow and direction of the air flow, etc. These actuators can realize automatic control according to the instructions of the control system, thereby realizing intelligent control of the tea drying line.

In addition, in order to ensure the stable operation of the tea drying line, fault monitoring and maintenance are also required. The control system can realize fault monitoring of all aspects of the tea drying line by setting up fault monitoring programs. Once a fault is discovered, the control system can automatically alarm and take appropriate measures to repair it. In addition, regular maintenance and upkeep are required to ensure the long-term stable operation of the tea drying line.

In summary, the basic principle of the automated control process of the tea drying line is to use a modern control system to achieve intelligent control. The control system needs to collect various parameter data during the tea drying process through sensors and use actuators to achieve automated control.