Drum scraper dryer is a kind of drying equipment widely used in industrial production, its main purpose is to dry wet materials through hot air to achieve drying and processing of materials.
This report will introduce in detail the working principle, characteristics and application areas of the drum scraper dryer, and analyze its advantages and disadvantages.
First, the working principle.
Drum scraper dryer is a kind of indirect heating drying equipment, and its working principle mainly includes the following steps:
1.Material feeding: Wet material enters the inside of the drum scraper dryer through the feed port.
2.Hot air heating: The hot air generated by the burner or electric heater enters the drum scraper dryer and raises its internal temperature.
3.The drum begins to rotate, and the wet material is constantly in contact with and collides with the drum wall under the action of gravity and centrifugal force inside the drum.
4.Scraping of the scraper: While the drum rotates, the scraper scrapes the material off the wall of the drum to form a film and fully exchange heat with the hot air.
5.Drying and discharge: Wet materials gradually lose moisture during heat exchange with hot air, forming dry materials, which are then discharged through the discharge port.
2. Features. The drum scraper dryer has the following characteristics:
1.Stable operation: The drum is made of high-temperature resistant materials, which can withstand high temperature and high pressure working environment, has good wear resistance and corrosion resistance, and can run stably for a long time.
2.High thermal efficiency: The drum scraper dryer adopts indirect heating mode, so that the hot air is fully in contact with the material, and the heat utilization rate is high, which can quickly dry the material and reduce energy consumption.
3.Good drying effect: the scraper scrapes the material off the drum wall to form a film, which increases the contact area between the material and the hot air and has a better drying effect.
4.Wide range of application: The drum scraper dryer is suitable for drying materials of various humidity and viscosity, and has a large range of application.
Third, the field of application.
Drum scraper dryers have been widely used in many industries, mainly in the following fields:
1.Chemical industry: used to dry chemical raw materials, granules, powders and other materials, such as fertilizers, plastics, rubber, pigments, etc.
2.Food industry: used for drying food raw materials, food additives, agricultural products, etc., such as cereals, beans, vegetables, etc.
3.Pharmaceutical industry: used to dry pharmaceutical raw materials, Chinese herbal medicines, pharmaceutical intermediates, etc., such as pharmaceutical powder, pills, tablets, etc.
4.Metallurgical industry: used for drying ore, coal, metal powder, etc., such as iron ore, copper powder, aluminum powder, etc.
5.Environmental protection industry: used for drying waste, waste water, waste gas, etc., such as sludge drying, waste gas treatment, etc.
4. Advantages and disadvantages.
Drum scraper dryer has the following advantages:
1.The drying efficiency is high and the drying speed is fast, which can greatly improve the production efficiency.