How to reduce the volume and weight of heavy metal sludge in low temperature sludge dryer

With the rapid development of China's economy, people's understanding of environmental protection is also improving. The treatment and disposal of solid and hazardous waste sludge produced in the production process of enterprises has become a problem that environmental protection departments pay more and more attention to. Due to the different moisture content of various sludge and its high humidity and viscosity, the treatment is difficult and the cost is high. Is there a good treatment method to reduce the weight and volume of hazardous waste sludge, so as to reduce the disposal cost of enterprises?

The metal sludge mainly comes from the solid waste produced by the industrial electroplating plant. Due to the different production processes of various electroplating plants, the composition of the metal sludge is also relatively complex, such as chromium, iron, copper, zinc and other heavy metals. Through the low temperature sludge drying machine, the disposal cost of sludge can be greatly reduced. It is an important way to realize the reduction of sludge volume and weight, harmless disposal and recovery of valuable metals.

At present, the low-temperature sludge dryer with three-stage multi loop technology core can effectively reduce the volume and weight of metal sludge by 60%, and reduce the moisture content of sludge to about 25%. For the current treatment cost of hazardous waste sludge, enterprises can recover the cost quickly.

So how to reduce the sludge weight in low temperature?

The drying speed of sludge is affected by temperature, wind speed, contact area with hot air and moving state. Low temperature drying technology is a drying method to increase the wind speed on the basis of reducing the drying temperature. The advantage of this technology is that there is no high-temperature drying will produce a lot of waste gas, and the drying rate will not affect the quality of finished products. Moreover, the cost of heating will be greatly reduced due to the low temperature. At present, the application of low-temperature drying technology is more and more extensive, which can be applied to the drying of solid hazardous waste sludge, sewage treatment, papermaking sludge, leather sludge, textile sludge, electroplating sludge, printing and dyeing sludge, chemical sludge, coal sludge and other sludge. It provides solutions and technical support for sludge disposal, metal recovery and solid waste disposal enterprises. As a new technology of environmental protection and energy saving, it solves the problems of high energy consumption and difficult waste gas treatment of traditional dryer to a great extent.

Technical features of low temperature sludge dryer:

Automatic control. It has the advantages of high intelligence, simple and convenient operation, stable performance and continuous operation.

Save space. It occupies a small area and reduces investment. The equipment is easy to install and debug. It can be installed indoors and outdoors, saving land.

Energy saving and environmental protection. It adopts "three-stage multiple sealing", with negative pressure operation, good sealing performance and good insulation effect, which can effectively reduce energy consumption; the operation of the whole system has no harmful gas and dust overflow; after drying, the waste gas is sent to the dust removal device, which reaches the emission standard through filtration and sedimentation, which has little impact on the environment;

Waste heat utilization. The boiler tail gas produced by the enterprise is used for drying, which can save energy and environmental protection, reduce energy consumption, save resources and improve economic benefits.