In sludge drying production line, low temperature sludge drying equipment is more common, which can reduce the moisture content of high water content material and heat separation by heat exchange, so as to meet the drying requirements of users. With the increase of sludge treatment and disposal demand in the drying market, there are more and more different low-temperature sludge drying equipment. Generally speaking, the drum type low-temperature sludge drying equipment technology can be divided into two types: single drum and three drum.
Introduction of single drum low temperature sludge drying equipment technology
The single drum low temperature sludge drying equipment is one of the drum dryers. The main machine is a separate rotary cylinder. There are various kinds of lifting plates and dispersal devices distributed inside the cylinder. In this way, the material enters into the contact process of the cylinder and high temperature air flow. With the rotation of the cylinder, the material is broken into small particles by the breaking device, and continuously under the action of the lifting plate Lift up and fall, increase the contact area between material and hot air, and dry the sludge by heating through the way of downstream or reverse flow drying.
The single tube low temperature sludge drying equipment is simple, easy to operate, and has less investment in one time, and has a high bearing capacity, and can operate continuously for a long time. It is suitable for drying materials with low water content.
Introduction of three drum low temperature sludge drying equipment technology
The process of three tube low temperature sludge drying equipment is relatively complex. The main structure is composed of three tubes nested with each other. After the wet materials are sent into the cylinder through the feeding device, the material and hot air shall be transferred by different ways in the inner, middle and outer tubes, thus realizing the process of fully drying the moisture inside the wet sludge. Compared with other materials, the three tubes of low temperature sludge drying equipment has higher thermal efficiency, smaller volume, small floor area and better insulation effect, which is suitable for drying large quantities of high humidity and high viscosity materials. Because the material has been dried in the cylinder by many ways, such as the following flow, reverse flow and reciprocating drying, the thermal drying efficiency is higher, the heat energy loss is less, and the equipment operation cost is reduced.
After understanding the above two different technologies of low temperature sludge drying equipment, users can choose the equipment according to the actual production situation. If the moisture content of the dried material is high and the viscosity is large, in order to avoid blocking the sticking wall in the drying process, the three tube drying process can be selected as much as possible. If the treated material has small moisture and strong dispersibility, and has no great viscosity, the drying process of single cylinder can be considered.
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