Guangzhou Longyue Environmental Protection Machinery Equipment
Contact: Luo Manager
Address: No. 46, Hongmian Avenue, Huadu District, Guangzhou
Mud is an inevitable product of sewage treatment plant and sewage station sewage treatment, without proper treatment and disposal of sludge into the environment, direct water and air bring secondary pollution, poses a serious threat to the ecological environment and human activities. Sludge can be divided into sludge dewatering process and sludge drying process. The following describes the advantages of different types of sludge dewatering machines. After the sedimentation treatment, the sewage will produce a lot of sludge. Even after concentration and digestion, the moisture content is still as high as 96% and the volume is large. It is difficult to dispose and dispose, and it must be dehydrated to increase the solid content of the mud cake so as to reduce the pollution. The floor area of mud stacking. The
Large and medium-sized sewage treatment plants generally use mechanical dewatering. There are many types of dewatering machines, which can be divided into vacuum filtration dewatering, pressure filtration dehydration and centrifugal dewatering according to the principle of dehydration.
The working principles of the filter presses (including belt filter presses and plate and frame filter presses) and centrifugal dewatering machines often used by domestic wastewater treatment plants, and the issues to be considered when selecting the equipment and maintenance operating costs Wait for an introduction.
1, belt filter press is affected by the impact of sludge load fluctuations, but also has a low moisture content out of the mud and less stable work and start-up, management and control is relatively simple, the characteristics of the operating personnel are not high quality. At the same time, as the belt filter press dewatering machine entered the country earlier, a considerable number of manufacturers have been able to produce such equipment. In the decision-making of the sewage treatment project, belt filter presses can be used to reduce the investment in the project. At present, most domestic new sewage treatment plants use belt pressure filter dewatering machines. For example, the first phase of the Hebei Wastewater Treatment Plant is a belt filter press dewatering machine. The filter belts and roller cylinders are in good condition since they were put into operation. Therefore, this model was still selected during the second stage equipment selection.
2. Compared with other types of dewatering machines, the general plate and frame filter press has the highest solids content of 35%. If considering the reasons for reducing the land occupation of sludge stacking, the plate and frame filter press should be the first choice. Program. How the filter plate moves. The requirement can be fully or semi-automatically completed by a hydraulic pneumatic device. The operation is inconvenient. The filter cloth oscillating device can make the filter cake easy to fall off. Compared with other type of dewatering machines, the biggest disadvantage of plate and frame filter presses is the larger floor space. The belt filter press used in the first phase of the sewage treatment plant and the plate and frame filter press used in the Anshan Industrial Wastewater Treatment Plant are taken as an example for comparison: the wastewater treatment plant has a wastewater volume of 500,000 t/d, sludge dewatering sludge The output is 1852.5m3/d, and the dry matter is 92.63t/d. Five KLEIN-KS30 belt type filter presses are used in Germany. The base area of each filter press is only 2750*3500mm. The Anshan Wastewater Treatment Plant For 22t/d, dry matter 275t/d, six plate and frame filter presses are used. The base area of each filter press is 2400*12000mm. At the same time, due to the intermittent operation of the plate and frame filter press, The efficiency is low, the operation environment is poor, and there is secondary pollution. The domestic large-scale wastewater treatment plants have rarely used it.