Ceramic drying method and equipment selection

1 requirements for the production of sanitary ceramics for dryers
(1) to have a good dry quality, and dry system to be easy and control, easy to operate and flexible.
(2) the yield should be high, and to facilitate the next process.
(3) less energy consumption, wherever possible, make use of plant waste heat.
Dry in the natural dry old enterprises in the high energy consumption, and some even reached 40% of energy consumption. As the dry operating temperature is low, and ceramic firing can not be separated from high temperature furnace, so the general ceramic factory has a lot of waste heat available.
(4) high production intensity, less land.
(5) effort, the provincial process, especially easy and before and after the process into an automatic line, reducing the number of handling.
(6) small environmental pollution. Modern grouting workshop has a large number of sophisticated machinery and equipment, and sometimes need to arrange two or three classes of production. Therefore, can not adapt to high temperature and humidity environment.
2 dryer classification
(1) whether the dry system is controlled
Can be divided into: natural dry and artificial dry. As the artificial drying is artificially controlled drying process, it is also called forced drying.
(2) according to the different drying methods can be divided into:
1) convection drying is characterized by the use of gas as a drying medium, at a certain rate to blow the surface of the body, so that the body can be dried.
2) Radiation drying is characterized by the use of infrared, microwave and other electromagnetic radiation energy, irradiation of the dried body to be dry.
3) Vacuum drying This is a method of drying the body under vacuum (negative pressure). The green body does not need to heat up, but the use of pumping equipment to produce a certain negative pressure, so the system needs to be closed, difficult to continuous production.
4) joint drying is characterized by the comprehensive use of two or more drying methods to play their respective strengths, complementary advantages, often can be more ideal drying effect.
(3) whether the dry system is divided into continuous intermittent dryer and continuous dryer.
Continuous dryer can be divided into the drying medium and the movement of the green body is divided into downstream, countercurrent and mixed flow; according to the different shape of the dryer is divided into room dryer, tunnel dryer and so on.
3 forming workshop drying system
This drying system is mainly applied to the gypsum mold only once a day (day shift forming) of the factory, according to intermittent operation. According to the drying system can be divided into the following two drying system. They have the common advantage is: the body in the mold after the mold, no need to move to dry, without the need to build a dryer, saving investment: to take full advantage of the formation of the workshop heat and space.
(1) traditional forming workshop drying system
The traditional way in the past is to install steam pipes and heat sinks in the forming plant. After the forming workers get off work, open the steam valve, improve the temperature inside the forming room, the body for heating and drying.
As the humidity inside the workshop can not control, heating efficiency is very low, is now less used.
(2) with the temperature, humidity, automatic control of the forming workshop drying system
This system is already dry, and the blowing duct (3 or more) is evenly set between the groups. The fresh air is sucked into the pipe by the exhaust port and mixed with the dry exhaust gas recirculated in the indoor part. The impurities in the air are removed by the filter, and then the cooling pipe and the heater are finally pressurized by the ventilator and sent to the blow pipe. The wet billet is bit dried.