The two devices under the principle and advantages as below:
1, belt filter press
Belt filter press is up and down by two tension filter belt entrained mud layer, from a series of regularly arranged roller cylinder S-shaped through the relying on the tension of the filter belt to form the pressure on the mud layer and shear force , The muddy layer of water pressed dry, get a solid content of dry cake, in order to achieve mud dehydration.
General belt filter press filter belt, roller cylinder, filter belt tensioning system, filter belt deviation system, filter belt washing system and filter belt drive system. For model selection, should be considered from the following aspects:
1) Filter belt. Require it to have higher tensile strength, resistance to twists and turns, acid and alkali resistance, temperature resistance and other characteristics, but also should consider the specific properties of sludge, select the appropriate weave texture, the filter belt has good air permeability and pollution Mud particle interception performance.
2) Roller cylinder deflection system. Generally completed by the pneumatic device.
3) filter belt tensioning system. Generally controlled by the pneumatic system. Filter tension generally controlled at 0.3-0.7MPa, commonly used value of 0.5MPa.
4) with speed control. Sludge of different nature has different requirements on the belt speed, that is, there is an optimum belt speed control range for any specific sludge. Within this range, the dehydration system can guarantee a certain amount of processing capacity, and Get high-quality mud cake.
Belt filter press affected by fluctuations in the mud load is small, but also has a lower water content of the mud and stable start-up less consumption, management and control is relatively simple, the quality of the operator is not high and so on. No domestic most of the sewage treatment projects are selected belt filter press.
2, plate and frame mud dehydrator
Plate and frame filter press is squeezed through the plate frame, so that the water inside the mud through the filter cloth discharge, to achieve the purpose of dehydration. It is mainly composed of recessed type filter plate, frame, automatic-pneumatic closed system test plate suspension system, filter plate vibration system, air compression device, filter cloth high pressure flushing device and fuselage side photoelectric protection device. Equipment selection, should consider the following aspects:
1) mud cake solid content requirements. General plate and frame filter press and other types of dehydration compared to mud cake containing the highest solids rate, if from the reduction of land occupation of sludge piling considerations, you can choose plate and frame filter press.
2) frame material.
3) filter plate and filter cloth material. Requires corrosion-resistant, filter cloth to have a certain tensile strength.
4) filter plate movement. Requirements can be a hydraulic or pneumatic automatic or semi-automatic device to reduce operator labor intensity.
5) Filter cloth oscillation device, so that the cake easy to fall off. Compared with other types of dehydration machine, plate and frame filter biggest drawback is the large area, need to be elevated and require manual operation.
Belt press and plate and frame filter press the same point: Frame filter press and belt filter press equipment are used in a wide range of washing sand slurry dehydration, piling mud, river sludge, urban sewage treatment , Food processing, petrochemical, metallurgical manufacturing, mining, metal forging, pharmaceutical and pharmaceutical, electronics, chemical industry and other industries abyss of use, dealing with these industries in the industrial production of liquid-liquid mixture, they play filtration separation Function role. Recyclable materials, waste water treatment, environmental protection.
1, belt filter press
Belt filter press is up and down by two tension filter belt entrained mud layer, from a series of regularly arranged roller cylinder S-shaped through the relying on the tension of the filter belt to form the pressure on the mud layer and shear force , The muddy layer of water pressed dry, get a solid content of dry cake, in order to achieve mud dehydration.
General belt filter press filter belt, roller cylinder, filter belt tensioning system, filter belt deviation system, filter belt washing system and filter belt drive system. For model selection, should be considered from the following aspects:
1) Filter belt. Require it to have higher tensile strength, resistance to twists and turns, acid and alkali resistance, temperature resistance and other characteristics, but also should consider the specific properties of sludge, select the appropriate weave texture, the filter belt has good air permeability and pollution Mud particle interception performance.
2) Roller cylinder deflection system. Generally completed by the pneumatic device.
3) filter belt tensioning system. Generally controlled by the pneumatic system. Filter tension generally controlled at 0.3-0.7MPa, commonly used value of 0.5MPa.
4) with speed control. Sludge of different nature has different requirements on the belt speed, that is, there is an optimum belt speed control range for any specific sludge. Within this range, the dehydration system can guarantee a certain amount of processing capacity, and Get high-quality mud cake.
Belt filter press affected by fluctuations in the mud load is small, but also has a lower water content of the mud and stable start-up less consumption, management and control is relatively simple, the quality of the operator is not high and so on. No domestic most of the sewage treatment projects are selected belt filter press.
2, plate and frame mud dehydrator
Plate and frame filter press is squeezed through the plate frame, so that the water inside the mud through the filter cloth discharge, to achieve the purpose of dehydration. It is mainly composed of recessed type filter plate, frame, automatic-pneumatic closed system test plate suspension system, filter plate vibration system, air compression device, filter cloth high pressure flushing device and fuselage side photoelectric protection device. Equipment selection, should consider the following aspects:
1) mud cake solid content requirements. General plate and frame filter press and other types of dehydration compared to mud cake containing the highest solids rate, if from the reduction of land occupation of sludge piling considerations, you can choose plate and frame filter press.
2) frame material.
3) filter plate and filter cloth material. Requires corrosion-resistant, filter cloth to have a certain tensile strength.
4) filter plate movement. Requirements can be a hydraulic or pneumatic automatic or semi-automatic device to reduce operator labor intensity.
5) Filter cloth oscillation device, so that the cake easy to fall off. Compared with other types of dehydration machine, plate and frame filter biggest drawback is the large area, need to be elevated and require manual operation.
Belt press and plate and frame filter press the same point: Frame filter press and belt filter press equipment are used in a wide range of washing sand slurry dehydration, piling mud, river sludge, urban sewage treatment , Food processing, petrochemical, metallurgical manufacturing, mining, metal forging, pharmaceutical and pharmaceutical, electronics, chemical industry and other industries abyss of use, dealing with these industries in the industrial production of liquid-liquid mixture, they play filtration separation Function role. Recyclable materials, waste water treatment, environmental protection.
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