Double-roller dryer

Abstract

The invention relates to the technical field of dryers, in particular to a double-roller dryer. The double-roller dryer comprises a first roller and a second roller, wherein the first roller and the second roller are arranged in parallel and are opposite in rotation direction, a material spraying device is arranged above the first roller and the second roller, a gap smaller than 5 cm is reserved between the first roller and the second roller, and the material spraying device is aligned to the gap. A material bin is arranged on the side opposite to the gap between the first roller and the second roller, a scraping plate is arranged on the material bin, the other end of the scraping plate is in circular contact with the periphery of the first roller and the periphery of the second roller, guide grooves are formed in the positions in contact with the first roller and the second roller, of the scraping plate, and the other end of each guide groove is connected with the inside of the material bin. By means of the technical scheme, the double-roller dryer enables materials to be dried easily and facilitates material discharge.

Description

technical field [0001] The invention relates to the technical field of dryers, in particular to a double-drum dryer. Background technique [0002] Drum dryer (also known as drum dryer, rotary dryer, etc.) is a contact type internal heating conduction drying machine. During the drying process, the heat is transferred from the inner wall of the drum to the outer wall, and passes through the dried material attached to the outer wall of the drum to evaporate the water on the material. It is a continuous drying production machine. Drum dryers are widely used in chemical industry, brewing, manufacturing, pharmaceutical, fertilizer, municipal sludge treatment, etc. The working principle of the drum dryer is: the material to be dried flows into the drum dryer, the material is attached to the surface of the drum, and the heating medium is passed through the drum, and the heat source of the drying material is generally selected as hot air, high-temperature flue gas, water vapor, etc....

AI Technical Summary

Problems solved by technology

[0007] The double-drum dryer adopting the above-mentioned technical scheme has the following advantages: 1. Through the gap between the two drums, the heating surface between the material and the drum dryer is increased, and at the same time, because the rotation directions of the two drums are opposite, the drums can be rotated. In the middle, the air flow is smooth, which is convenient for the heat dissipation and drying of the drum, which improves the drying efficiency of the drum, overcomes the disadvantages of inconvenient control of the diameter of a single drum and slow heat dissipation of the drum in the prior art, and the material is easy to dry; 2. A scraper is installed on the silo , the connection between the scraper and the silo increases the stability of the connection and helps the scraper to scrape the material. At the same time, the scraper is set on the side of the drum, and the scraper also helps to form a channel for diversion while scraping the material , to facilitate the whereabouts of the material, and the material is not easy to stick to the drum, ensuring the smoothness of the discharge

Images