The drying treatment method of domestic sewage sludge

The water content of sludge from sewage treatment plant is more than 90%, which is difficult to store and treat. Usually, the sewage treatment plant first concentrates the sludge and initially reduces its moisture content, and the moisture content of the concentrated sludge is about 60%. This is mainly based on the sludge quality, concentration reagent added, concentration time and other factors. The thickened sludge can be mechanically dehydrated by sludge dewatering equipment to further reduce the moisture content in the sludge. If you want to achieve the goal of sludge harmless, stabilization, reduction and resource treatment, you still need to use domestic sludge dryer equipment. The equipment uses high-temperature heat transfer to quickly evaporate the water in the sludge, reducing the sludge volume to one-third to one-fifth of the original, greatly facilitating the subsequent transportation, storage and resource reuse of sludge.

Introduction of equipment and process of domestic sludge dryer

The domestic sludge dryer adopts the "Rotary harrow three-cylinder multiple-loop" drying technology, which is exclusive to ZJN company. The equipment adopts the "three-stage positive and negative guiding material" and "W + s" feeding process, which greatly increases the contact between sludge and hot air, makes sludge always in the ideal drying state, improves the heat energy utilization efficiency and work efficiency, and ensures that the dried sludge is evenly dried and wet, and the original quality is stable Tissue composition did not change. At the same time, it can reduce environmental pollution and increase economic benefits for enterprises. Therefore, the domestic sludge dryer can realize the sludge harmless treatment, which meets the domestic demand of low-carbon and environmental protection.

Characteristics of domestic sludge dryer

1. Low energy consumption. The direct heating mode adopted by the equipment makes the sludge fully contact with the hot air and better realize the heat transfer. In addition, a heat preservation layer is arranged outside the cylinder of the equipment, which greatly reduces the heat loss inside the cylinder.

2. It covers a small area. The equipment adopts three sleeve structure, which not only increases the internal capacity of the cylinder, but also greatly reduces the length of the equipment. The equipment can be reasonably installed according to the actual floor area of users.

3. It has a wide range of applications. It can be used in municipal, electroplating, chemical, steel, paper, printing and dyeing, textile, pharmaceutical, leather, coal and other industries.

4. The operation is simple. The whole equipment adopts automatic control, and the operation is simple and convenient. Generally, a set of equipment only needs 2-3 people to complete the whole operation.

5. The environmental pollution is small. The whole equipment is sealed tightly, which can avoid dust overflow in the drying process. At the same time, the dried tail gas is filtered, purified and dusted by the dust removal equipment to meet the requirements of gas emission.