1. Screw type sludge dehydrator structure principle
The main body of Screw type sludge dehydrator is a filtration device consisting of a fixed ring and a moving ring stacked on top of each other and a screw shaft running through it. The front section is the thickening section, and the rear section is the dewatering section. The filtration slit between the fixed and moving rings and the pitch of the screw shaft gradually decreases from the thickening section to the dewatering section.
The rotation of the screw shaft drives the sludge from the thickening section to the dewatering section, and at the same time drives the moving ring to clean the slit to prevent clogging.
2. Screw type sludge dehydrator dewatering principle
After the sludge is thickened by gravity in the thickening section, the Screw type sludge dehydrator is transported to the dewatering section, and in the process of moving forward, the filter slit and the pitch gradually become smaller, and the back pressure plate blocks the sludge, generating a great internal pressure and reducing the volume continuously to achieve the purpose of full dewatering.
3.Screw type sludge dehydrator scope of application
1) Applicable to sludge from municipal sewage, food, beverage, chemical, leather, welding, paper, printing and dyeing, pharmaceutical and other industries.
2)Screw type sludge dehydrator is suitable for dewatering high and low concentration sludge. When dewatering sludge with low concentration (2000mg/L~), there is no need to build thickener and storage tank, which reduces the construction cost and the release of phosphorus and anaerobic odor.
4. Screw type sludge dehydrator has three advantages
1) Energy-saving principle design, compact size, strong working reliability, long service life, and can keep continuous operation all year round.
2) High degree of automation, easy to operate, can add automatic control system according to the user's demand, realize fully automatic unmanned operation, and can realize dewatering without secondary pollution for toxic sludge.
3) High dewatering efficiency, up to about 75%-85%, low energy consumption, made of all stainless steel, strong corrosion resistance.
5. What are the elements that affect the drying speed in the work of Screw type sludge dehydrator equipment?
Screw type sludge dehydrator is compact in design, and the dewaterer contains inside the electric control cabinet, metering tank, flocculation mixing tank and the main body of the dewaterer.
1) Quality of heat supply installation and fuel
The heat source is a very important part of the sludge drying operation. If the sludge dryer is equipped with reasonable heat supply installation, the fuel used is of high quality, high combustion value and can be completely extinguished, then the speed of sludge drying will be accelerated. On the contrary, it will reduce the efficiency of sludge drying.
2) Humidity of sludge
For all drying equipment, the humidity of the material affects the efficiency of the equipment, and the sludge dryer is no exception. If the moisture content of the sludge is too large, more heat will be consumed in the process of Screw type sludge dehydrator, which will increase the running time of the sludge in the dryer accordingly, thus reducing the speed of sludge drying.
3) The goal of sludge treatment and disposal is to realize the reduction, stabilization and harmlessness of sludge; encourage the recovery and utilization of energy and resources in sludge. Adhere to the premise of environmental protection and economy to achieve the treatment and disposal of sludge and comprehensive utilization, to achieve the purpose of energy saving and emission reduction and development of circular economy.
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