How to make the best use of multi-layer sludge drying equipment

Sludge contains a large number of heavy metals, bacteria, pathogens and other pollutants, which will cause serious harm to the environment, animals and plants. Therefore, sludge as a source of pollution is often rejected by people, but on the other hand, sludge is also a great treasure house. After being dried by multi-layer sludge drying equipment, the sludge volume and weight reduction effect is very obvious. After subsequent processing, it can be made into environmental protection brick, ceramsite, combustion power generation, land use, etc., which can be said to make the best use of everything.

The quality of sludge drying effect affects the value of subsequent sludge resource utilization, so what factors cause the drying effect? There are many reasons, such as material characteristics and size, moisture content before drying, heat source temperature, air volume, drying process, etc. Next, we will introduce the more important parts:

1. Material characteristics and size

The particle size and viscosity of sludge affect the drying effect of the equipment. Due to the multi-layer sludge drying equipment is used to dry materials by water evaporation under the high-temperature thermal drying technology, so in the drying process, the materials will also evaporate water, and the internal moisture needs to be transferred to the surface of bulk materials for evaporation. Therefore, the smaller the size of the material, the better, so as to reduce the moisture transfer process. Therefore, the inner part of the dryer cylinder is often equipped with a crushing device and a material lifting and guiding system, whose function is to disperse the crushed sludge, increase the contact area between the sludge and the hot air, and prevent the sludge from sticking and caking.

2. Moisture content before drying

Usually, some pretreatment operations will be done before sludge drying, such as sludge conditioning, sludge dewatering and other steps, in order to make the sludge easier to dehydrate and avoid high moisture content. Otherwise, more heat energy and longer drying time will be used in drying, which is unfavorable to accelerating drying efficiency.

3. Temperature and wind speed

Temperature, air volume, wind speed and other parameters play an important role in sludge drying effect. Experienced equipment operators can quickly adjust the parameters to the appropriate range, so as to give full play to the performance advantages of multi-level sludge drying equipment.