1 Hygienic ceramics production requirements for dryers (1) Must have good drying quality, and the drying system should be easy to control and easy to operate. Tylvalosin Tartrate,Tylvalosin Premix,Tylvalosin Veterinary Drug,Tylvalosin Tartrate Pig Shandong Shengli Bioengineering Co., Ltd , https://www.shenglipharm.com
(2) The output should be high and it is conducive to the next process.
(3) The energy consumption should be small, and the waste heat of the factory should be used whenever possible.
Dry energy consumption in modern, dry, and dry enterprises is high, and some even reach 40% of production energy. Since the drying operation temperature is low, and the ceramic firing is inseparable from the high temperature furnace, the general ceramic factory has a large amount of waste heat available for use.
(4) High production intensity and small land occupation.
(5) Labor-saving, provincial process, especially easy to connect with the front and rear processes into automatic lines, reducing the number of handling.
(6) Small pollution to the environment. There are a lot of sophisticated machinery in the modern grouting workshop, and sometimes it is necessary to arrange two or three shifts. Therefore, it cannot adapt to the environment of high temperature and high humidity.
2 Classification of dryers (1) According to whether the drying system is controlled, it can be divided into: natural drying and artificial drying. Since artificial drying is an artificial control of the drying process, it is also called forced drying.
(2) Classification according to different drying methods can be divided into:
1) Convection drying is characterized by using gas as a drying medium to blow the surface of the body at a certain speed to dry the body.
2) Radiation drying is characterized by the use of radiant energy of electromagnetic waves such as infrared rays and microwaves to illuminate the dried body to be dried.
3) Vacuum drying This is a method of drying a green body under vacuum (negative pressure). The blank does not need to be heated, but it needs to use the pumping equipment to generate a certain negative pressure, so the system needs to be sealed and it is difficult to continuously produce.
4) Joint drying is characterized by comprehensive use of two or more drying methods to exert their respective characteristics, complementary advantages, and often can obtain a more ideal drying effect.
(3) According to whether the drying system is continuously divided into a batch dryer and a continuous dryer.
The continuous dryer can be divided into downstream, countercurrent and mixed flow according to the direction of movement of the drying medium and the blank; according to the shape of the dryer, it is divided into a chamber dryer and a tunnel dryer.
3 Forming shop drying system This drying system is mainly suitable for the factory where the plaster mold is only formed once a day (white shift forming), and it is operated in a batch mode. According to whether the drying system can be adjusted, it can be divided into the following two drying systems. They have the common advantage that the blank can be dried without being moved after demolding, without the need for a separate dryer, saving investment: making full use of the heat and space in the forming workshop.
(1) Conventional Forming Workshop Drying System The traditional way in the past was to install steam pipes and radiators in the forming shop. After the forming worker gets off work, the steam valve is opened to raise the temperature in the forming chamber, and the body is heated and dried.
Since the humidity in the workshop cannot be controlled, the heating efficiency is very low and it is now used less.
(2) Forming workshop drying system with automatic control of temperature and humidity This system has been artificially dried, and uniform blowing pipes (3 or more) are arranged between each group of stands. The outdoor fresh air is sucked into the pipeline by the exhaust vent, mixed with the dry exhaust gas partially recirculated in the room, and the impurities in the air are removed through the filter, and then passed through the cooling pipe and the heater, and then pressurized by the ventilator and sent to the blower branch pipe. The wet blank is subjected to para-drying.