In the process of sludge filtration and treatment, the sludge treatment cost and the premise investment are two important parts of the enterprise, the sludge treatment cost affects the long-term development of the enterprise, so by choosing the right equipment, the running cost can be reduced by half or more than half. So when customers choose the equipment, they will consider the investment cost and running cost, so how much is the plate and frame filter press? Is the later running cost high? As a matter of fact, many manufacturers sell the equipment at wholesale price.
How much does plate and frame filter press cost? How much investment cost is needed?
If the raw water to be treated is 2000m3/day, the sewage treatment plant that produces 8~10
t/d of dry sludge is thickened to a mud-water mixture with a solid content of about 3% (the suspension in the water varies from industry to industry and from treatment to treatment), i.e. about 300m3/day of mud-water mixture; a centrifuge with a design capacity of 4~15m3/h can be used. A one-meter belt filter press, which has a capacity of 4 to 12m3/h or so. A 120-meter-meter automatic pull-plate plate and frame filter press, which has a processing capacity of about 3 to 10m3/h. Among these three types of equipment, the centrifuge has the lowest price and the automatic pull-plate type plate and frame filter press has the highest price.
Does plate and frame filter press have high running cost in the later stage?
a, flocculant consumption
In the centrifuge, due to the centrifugal force field is very large, fine sludge can also be separated from the water, so the amount of flocculant dosage is less, the general mixed sludge dewatering dosage is: 1.2
kg/tds or so, the sludge recovery rate of 95%
above, the dehydration of sludge cake moisture content of 65% to 80%.
The belt filter in order to improve the handling capacity, the filter belt can not be woven too dense, in order to prevent the fine sludge leakage, need to add more flocculant, in order to make the sludge form a larger floc, the general mixed sludge dewatering dosage of more than 3
kg / tds, the sludge recovery rate of 90% or so, after dewatering, the cake moisture content of 80% or so.
The dosage of decanter centrifugal dewatering machine is much more economical than that of belt filter press, and the dosage of decanter centrifugal dewatering machine is low in molecular weight and inexpensive, while the dosage of belt filter press is high in molecular weight and expensive. A one-meter belt filter press working 8 hours a day with the amount of drugs generally in four to five kilograms; a 355-type decanter centrifugal dewatering machine working 8 hours a day with the amount of drugs in two to three kilograms, depending on the sludge, centrifugal machine can even be a lot of materials can not add drugs to achieve better results. For example: papermaking, wool spinning, acetylene gas slag, human storage of fecal matter, mine tailings and other coarse particles of easily precipitated materials, do not need flocculants, and belt filter presses can not be; this greatly reduces the dosing and treatment costs.
b, electricity, water consumption
Centrifuge in use when the power consumption is higher than the belt machine three to four kilowatts, according to the daily work of eight hours a day more than thirty dollars a day. And centrifuge in the whole dehydration process, do not need water flushing. Just use a small amount of water to rinse the inner chamber when stopping. Belt filter press is different, a one-meter belt filter press needs sixty to seventy cubic meters of water for filter belt backwashing every day. These backwash water and then back to the sedimentation tank reprocessing, according to the treatment cost of 2.5 yuan per cubic meter of water per day to increase the cost of at least 150 yuan, such as the use of tap water backwash cost is higher, compared to the two can save 120 yuan per day, at least 40,000 yuan a year savings. Plate and frame filter press in the treatment of sludge, it is necessary to clean the filter cloth, otherwise it will affect the treatment effect, growth of processing time, time-consuming and laborious.
c, labor consumption
Decanteral centrifuge labor intensity is small, high degree of automation, easy to operate, a person can manage 2 to 3 units; belt filter press operation is complicated, the operator's technical requirements are high, generally 1 to 2 people to manage 1 to 2 units; plate and frame filter press operation is simple, but labor intensity is greater, the working environment conditions are poor, generally 2 people to manage 1 to 2 units, the operator's treatment requirements are higher. The operation of plate and frame filter press is simple but labor-intensive, with poor working environment conditions. If calculated according to 80 yuan / person day, decanter centrifuge for 80 yuan / day Taiwan, belt filter press for 160 yuan / day Taiwan, plate and frame filter press 100 to 160 yuan / day Taiwan.
3, the use of maintenance costs
Decanteral centrifugal dewatering machine less wearing parts, only the V-belt, bearings will be damaged, such as the replacement of only a few hundred dollars; belt filter press wearing parts, because of the characteristics of the open-type operation, the rotor shaft, gears, bearings and filter belts and other sewage corrosion and running wear and tear, easy to damage, repair and replacement of thousands of dollars or even tens of thousands of dollars; plate and frame filter press filter cloth will be damaged, replacement also requires a few thousand dollars. Replacement also requires several thousand dollars.