Belt press mud dewatering in the sludge treatment process may encounter some problems, such as high mud moisture content, mud cake too wet, mud extrusion during press filtration. In order to solve these problems and achieve deep dewatering of sludge, the following measures can be taken:
One. Optimization of sludge conditioning
Use of sludge conditioner: By adding sludge conditioner (such as polyacrylamide, etc.), change the physical and chemical properties of sludge and improve its dewatering performance. The selection and use of the conditioner should be adjusted according to the specific nature of the sludge to achieve the best dewatering effect.
Improve mixing conditions: To ensure that the conditioner is fully mixed with the sludge, it can be achieved by adjusting the dosing point and dosing method, and optimizing the operating parameters of the mixing equipment.
Two, adjust the belt machine operating parameters
Adjust the filter speed: Reducing the filter speed can extend the filtration time, thereby improving the dehydration effect. However, too low filter speed can lead to reduced processing power, so it needs to be balanced according to the actual situation.
Adjust the band pressure: Increasing the band pressure can improve the efficiency of dehydration, but too high a band pressure may cause damage to the filter band or the mud is squeezed out. Therefore, it is necessary to adjust according to the nature of the sludge and the bearing capacity of the belt machine.
Three, improve equipment and maintenance
Check and clean the filter belt: check and clean the filter belt regularly to ensure that its surface is clean and non-clogged to ensure a good filtering effect.
Maintenance equipment: Regular maintenance and maintenance of the belt machine, including inspection of bearings, lubrication parts, replacement of damaged parts, etc., to ensure the normal operation of the equipment and extend the service life.
Four, the use of deep dehydration technology
For sludge that needs to achieve a higher degree of dehydration, deep dehydration technology can be considered, such as high pressure belt continuous sludge deep dehydration technology. In this technology, the cell wall of microorganisms in the sludge is destroyed by adding modifiers, the internal bound water and the intracellular water are released, and then the high pressure belt continuous sludge deep dewatering machine is used for physical extrusion treatment to achieve deep dehydration.
Five, comprehensive treatment strategy
Combined with other dehydration methods: according to the nature of the sludge and treatment requirements, other dehydration methods can be combined, such as centrifugal dehydration, plate and frame press filtration dehydration, etc., to achieve better dehydration effects.
Consider the final disposal of the sludge: the deep dehydration of the sludge is not only to reduce the volume and facilitate transportation, but more importantly, for subsequent safe disposal and utilization. Therefore, when selecting the dehydration method, it is necessary to consider the final disposal method of the sludge.
In summary, to solve the problem of mud dewatering by belt press and achieve deep dewatering of sludge, it is necessary to start from many aspects, including optimizing sludge conditioning, adjusting the operating parameters of belt press, improving equipment and maintenance, adopting deep dewatering technology and developing comprehensive treatment strategies. Through the implementation of these measures, the dewatering efficiency and quality of sludge can be effectively improved, and favorable conditions can be created for the subsequent disposal and utilization of sludge.