Polypropylene diaphragm filter plate
Polypropylene diaphragm filter plateIt is made of two pieces of membrane and a core plate combined with high temperature thermal bonding, and the extrusion chamber (hollow) is formed between the membrane and the core plate. The external medium (water or compressed air, etc.) enters into the chamber between the core plate and the membrane, so that the membrane swells and compresses the cake in the filter chamber, thus realising the second extrusion of dewatering of the filter cake. The membrane is modified with high quality TPE elastomer, which has high strength, high resilience and high temperature and pressure resistance; the working filtration pressure is up to 1.2MPa, and the pressing pressure is up to 2.5MPa; the filter plate adopts a special runner design, which can increase the filtration speed by about 20% and the water content of the filter cake is lower.
polyethylenefilter plateTPE elastomer and alkali-free glass fibre polypropylene materials are used to enhance the modification, so that the filter plate has strong toughness and rigidity, improve the sealing performance of the filter plate compression, corrosion resistance; temperature resistance up to 150 ℃, pressure resistance up to 2.0MPa; the filter plate adopts a special design of the flow channel, the filtration speed is fast to achieve the fast flow of water to improve the service life of the high filter plate.
Role of the filter plate
The filter plate is built to store the middle of the filter cake. When the filter press plate is designed and manufactured at the beginning, there is an inward depression design, and the diaphragm filter plate automaticfilter pressThe design is to store the volume of filter cake when the filter cloth intercepts the cake, and the blind spot at the bottom is also to increase the friction on the cake, which is used to support the cake more. So it seems that the filter plate plays a role in storing and supporting the filter cake.
Filter Press Plates
1、Filter press filter plate is used in:Chemical industry
Dyestuffs, pigments, caustic soda, chlorinated mud, silica, chorine, graphite, bleaching powder, lite powder, phosphor, insurance powder, chloric acid powder, copper sulphate, manganese sulphate, ferrous sulphate, ferric hydroxide, water purifying agent (aluminium sulphate, polymerised aluminium chloride, alkaline aluminium chloride), and so on.
2,filter pressFilter plate applications: pharmaceuticals
Antibiotics (gentamycin, erythromycin, spiramycin, wellbutrin, madecassic, tetracycline, safranin, oxytetracycline), calcium phytate, herbal medicines, inositol, growth derived yarns, organophosphorus, saccharomyces cerevisiae etc.
3、Filter press plates are used in: foodstuffs, yellow wine, white wine, fruit juice, beverages, beer, yeast, citric acid, vegetable proteins, vegetable molassesin, glucose, maltose, starch sugar, starch, rice flour, corn syrup, gums, carrageenan, monosodium glutamate, spices, sauce liquids, oral liquids, soya milk and seaweeds, anandamide tablets, Benadryl tablets and so on.
4,Filter Press PlateApplication: metallurgy, gold ore, silver ore, copper ore, iron ore, zinc ore, rare earth and other powder beneficiation and so on.
5、Filter press filter plate is used in: oil refining, white oil, fragrance oil, light oil, glycerin, mechanical oil, vegetable oil, etc.
6、Filter press filter plate is applied to: clay, kaolin, bentonite, active soil, porcelain clay, electronic ceramic soil, etc.
7 Filter press filter plates are used in: sewage treatment, chemical sewage, smelting sewage, electroplating sewage, electrolysis sewage, leather sewage, printing and dyeing sewage, brewing sewage, pharmaceutical sewage, environmental sewage, paper sewage and so on.
8、Filter press filter plate is used in: coal selection industry, coal processing, tailing coal treatment, coking coal and so on.
9、Filter press filter plates are used in: infrastructure, foundation piling, tunnelling, etc.
10、Filter press filter plate is applied to: municipal city sewage, river dredging, etc.
Difference between chamber and plate and frame filter plates compared to diaphragm filter plates:
1. With compartments and platesFrame Filter PressIn contrast to filter plates, diaphragm filter plates have a back-and-forth movable filter surface - the diaphragm. When a pressing medium (e.g. compressed air or water) is introduced on one side of the diaphragm, these movable diaphragms bulge out in the direction of the filter chamber, so that the cake in the chamber is uniformly pressurised over the entire filter surface, i.e. after the filtration process is complete, the filter plate, squeezes the cake again.
2. ForChamber Filter PressAnd plate and frame filter plate, if you want to achieve a high solid content of the cake, the filter chamber must be completely filled. With the continuation of the filtration process, the thickness of the cake gradually increases, and the resistance to dewatering increases exponentially, the filter plate wholesale, which leads to a sharp decline in the handling capacity. Generally for the chamber filter press, in the first half of the cycle of filtration, chamber filter plate wholesale manufacturers, the processing capacity exceeds the total processing capacity of 70%, while the second half of the cycle is less economical.
3,diaphragm filter pressIt precisely overcomes those disadvantages of the chamber filter press. As the diaphragm moves, the thickness of the cake is variable, one can choose between processing capacity and filtration time to achieve the right amount of feed, and the solids content of the cake is controlled by the amount of post-press pressure.
4, with the increase of filtration pressure, the danger of generating differential pressure at the end of each filtration cycle also increases rapidly, while the diaphragm technology advocates low-pressure filtration and high-pressure pressing, which greatly avoids the generation of differential pressure, which is another advantage of the diaphragm filter plate.
Why the filter press plate is designed with a concave shape?
filter plateThe external shape of the filter plate: the shape of the filter plate is concave on both sides towards the centre, and there will be numerous blind spots on the bottom side.
The purpose is that the solids intercepted by the filter cloth during the filtering process of the filter press can have a storage space. Then the design of the blind spot also has its own secret, that is to store the solids, increase the friction between the filter plate and the filter cake, effectively support the cake, and another purpose is to let the dialysed water can have a usual circulation route, conducive to let the water flow out of the equipment quickly, to increase the working efficiency of the equipment. One of the large filter plate will also appear a few with the same thickness of the filter plate tab, the purpose of doing so is to let the pressure can be very good one by one to pass each other down, but also to prevent the filter plate space gap, can not withstand the strong pressure and damage.
Filter press filter plate from the material, structure, use to distinguish between
1, from the material to distinguish: filter press filter plate is divided into polypropylene filter plate, polyethylene filter plate, cast iron filter plate, stainless steel filter plate.
2, from the structural distinction: filter press filter plate is divided into, chamber filter plate, plate and frame filter plate, diaphragm press filter plate, round filter plate.
3, the difference in use: plate and frame filter plate, by a solid filter plate and a hollow filter plate, mainly used in the oil and grease industry, can be added to assist the filter paper, as a kind of fine filtration equipment, suitable for solid materials, especially less industry.
Filter press plate material advantages and disadvantages
1, PP polypropylene is currently commonly used, that is, polymer polypropylene. This material, for a variety of acid and alkali resistance is very good, including strong acid hydrofluoric acid, have good resistance. But the working temperature range is relatively small. Most can only withstand a short period of time 70 ° of the material. High-temperature filter plate is acid-resistant, temperature-resistant organic materials, normal temperature resistance can reach about 150 °, but the alkali resistance is very poor.
2, diaphragm filter plate, good elasticity, the water content of the cake has been done below 30%.
3, Rubber filter plate, acid and alkali resistance, high temperature resistance, high sealing.
4, Aluminium filter panels, of all metal filter panels, are light, but relatively less resistant to acidity.
5, cast iron filter plate, heavy weight, poor acid resistance, temperature resistance.
6, stainless steel filter plate, acid and alkali resistance is better, but the price in all the filter plate z big, after all, the material itself is expensive, and machining time-consuming is very big.
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Sales:181-181-000-11
Selection:188-517-18-517
Mailbox:suton@su-ton.com
Filter Press Plate
Filter press plate is the key to the filter press treatment process, the quality of the filter plate, the selection directly affects the final results of the filter press.
Filter press plate pressing method
Chamber Filter Plate: It consists of several filter plates with holes in the middle, which can be applied to most of the industries, and is characterised by fast filtration speed and high filtration pressure.
Plate and frame filter press filter plate: it is filled with slurry between the filter plate.The water is squeezed out by squeezing the filter plate and the sludge is filtered through the filter cloth to finally achieve dewatering..
Diaphragm press type filter plate: It consists of a filter plate with a hole in the centre and a membrane plate that can be inflated internally. It is mainly used to pump air into the membrane plate after filter pressing to further squeeze the filter cake and press it twice to achieve the effect of further reducing the liquid content of the filter plate.
Filter press plate classification, material, discharge, feed, washing method
Filter Press PlateDivided into chamber, plate and frame, diaphragm type, closed embedded;
Material: PP polymerPolybutylene, PVDF organic, rubber, cast iron, aluminium, stainless steel and other materials;
Filter plate discharge methods are, open flow, concealed flow;
The filter plate feeding methods are, corner feeding, middle feeding, and middle and upper feeding;
Cake washing methods are, open flow washable, dark flow washable, closed embedded filter plate sealing surface sealing strip has EPDM sealing, Viton sealing, filter cloth is embedded.
Difference between chamber and plate and frame filter plates compared to diaphragm filter plates:
1. With compartments and platesFrame Filter PressIn contrast to filter plates, diaphragm filter plates have a back-and-forth movable filter surface - the diaphragm. When a pressing medium (e.g. compressed air or water) is introduced on one side of the diaphragm, these movable diaphragms bulge out in the direction of the filter chamber, so that the cake in the chamber is uniformly pressurised over the entire filter surface, i.e. after the filtration process is complete, the filter plate, squeezes the cake again.
2. ForChamber Filter PressAnd plate and frame filter plate, if you want to achieve a high solid content of the cake, the filter chamber must be completely filled. With the continuation of the filtration process, the thickness of the cake gradually increases, and the resistance to dewatering increases exponentially, the filter plate wholesale, which leads to a sharp decline in the handling capacity. Generally for the chamber filter press, in the first half of the cycle of filtration, chamber filter plate wholesale manufacturers, the processing capacity exceeds the total processing capacity of 70%, while the second half of the cycle is less economical.
3,diaphragm filter pressIt precisely overcomes those disadvantages of the chamber filter press. As the diaphragm moves, the thickness of the cake is variable, one can choose between processing capacity and filtration time to achieve the right amount of feed, and the solids content of the cake is controlled by the amount of post-press pressure.
4, with the increase of filtration pressure, the danger of generating differential pressure at the end of each filtration cycle also increases rapidly, while the diaphragm technology advocates low-pressure filtration and high-pressure pressing, which greatly avoids the generation of differential pressure, which is another advantage of the diaphragm filter plate.
Why the filter press plate is designed with a concave shape?
filter plateThe external shape of the filter plate: the shape of the filter plate is concave on both sides towards the centre, and there will be numerous blind spots on the bottom side.
The purpose is that the solids intercepted by the filter cloth during the filtering process of the filter press can have a storage space. Then the design of the blind spot also has its own secret, that is to store the solids, increase the friction between the filter plate and the filter cake, effectively support the cake, and another purpose is to let the dialysed water can have a usual circulation route, conducive to let the water flow out of the equipment quickly, to increase the working efficiency of the equipment. One of the large filter plate will also appear a few with the same thickness of the filter plate tab, the purpose of doing so is to let the pressure can be very good one by one to pass each other down, but also to prevent the filter plate space gap, can not withstand the strong pressure and damage.
Filter press filter plate from the material, structure, use to distinguish between
1, from the material to distinguish: filter press filter plate is divided into polypropylene filter plate, polyethylene filter plate, cast iron filter plate, stainless steel filter plate.
2, from the structural distinction: filter press filter plate is divided into, chamber filter plate, plate and frame filter plate, diaphragm press filter plate, round filter plate.
3, the difference in use: plate and frame filter plate, by a solid filter plate and a hollow filter plate, mainly used in the oil and grease industry, can be added to assist the filter paper, as a kind of fine filtration equipment, suitable for solid materials, especially less industry.
Filter press plate material advantages and disadvantages
1, PP polypropylene is currently commonly used, that is, polymer polypropylene. This material, for a variety of acid and alkali resistance is very good, including strong acid hydrofluoric acid, have good resistance. But the working temperature range is relatively small. Most can only withstand a short period of time 70 ° of the material. High-temperature filter plate is acid-resistant, temperature-resistant organic materials, normal temperature resistance can reach about 150 °, but the alkali resistance is very poor.
2, diaphragm filter plate, good elasticity, the water content of the cake has been done below 30%.
3, Rubber filter plate, acid and alkali resistance, high temperature resistance, high sealing.
4, Aluminium filter panels, of all metal filter panels, are light, but relatively less resistant to acidity.
5, cast iron filter plate, heavy weight, poor acid resistance, temperature resistance.
6, stainless steel filter plate, acid and alkali resistance is better, but the price in all the filter plate z big, after all, the material itself is expensive, and machining time-consuming is very big.
Calculation of the dewatering area of a filter press:
Where: A-filter press dewatering area, m;
QS-volume of sludge per dewatering (feed volume), m;
q-Dewatering load, m/(m-h);
t-Time of each dehydration, h.
Calculation of filter area of filter press cloth:
Where: A1 - Filter area of filter press cloth (m2);
W - Productivity of the filter press (m3/h);
C - Filtering rate of the filter press (kg/(m2-h));
T - daily working time of the filter press (h);
f - Utilisation usage factor for filter press cloth, f = 0.9;
r-Reliability coefficient of filter press filtration speed, r = 1.0 to 1.5.
Calculation of daily dry sludge production from filter presses:
Where: W1 - Volume of dry sludge produced per day;
S1 - Suspended matter content of municipal wastewater (mg/L) (generally 10,000 mg/L).
S2 - Amount of quicklime per tonne of wastewater (mg/L) (generally 4000 mg/L).
Q - Daily wastewater production.
Calculation of the wet sludge cake content of a filter press for primary filtration:
Where: W2 - Plate and frame filter press filtering a wet sludge cake volume (T);
W1- Volume of dry sludge produced per day;
n - Number of filter presses per day for plate and frame filter presses;
P-Moisture content of wet sludge cake.
Plate and frame filter presses have a filter press area of:
Where: S-the filter press area of the filter press plate and frame (m2);
W2 - Volume of wet sludge cake (T) filtered once by plate and frame filter press;
t-Thickness of wet sludge cake after filter press;
G - Volume weight of wet sludge cake treated in filter press.
For more information about the filter press plate, please contact us through the following ways.
Contact Us
Sales:181-181-000-11
Selection:188-517-18-517
Mailbox:suton@su-ton.com
Damage to filter press plates is the biggest pain point for users.
Damage to the filter plate increases the operating cost of the filter press. As each manufacturer uses a different filter press conditions, environment, materials are different, the damage is not the same way.
In the use of the process of encountering a variety of reasons for damage, we insist on starting from the daily maintenance is a greater help to the service life of the filter plate.
1, the filter press filter plate to keep clean. Filter plate cleaning is not clean will cause the media leakage, the media leakage caused by a large number of pressure can not be raised, the mud cake can not be formed;
2. Complete a cycle to reduce the filter press plate volume;If the flow outlet is clogged with solids or the supply or outlet valve is closed at start-up, there is nowhere for pressure to escape to the point of causing damage;
3. Inspectionfilter pressFilter cloth, clean the drain, check the outlet, open the appropriate valve and release the pressure; Insufficient feed or feed containing unsuitable solid particles will likewise cause damage to the plate and frame itself by excessive force;
4, when the sludge is too thick or there are dry pieces left, it will cause the blockage of the feed port, at this time, there is no medium between the filter press plate only the pressure of the hydraulic system itself, the plate is very easy to cause damage due to long time pressure. Clean the filter plate carefully and repair the filter press plate.
5, the filter plate after a period of time, due to the impact of particulate matter and other factors, the edge of the filter plate will appear grooves, if these small injuries do not pay enough attention, it is easy to lead to the cake forming is not in place, which will cause the grooves to expand, the cake forming difficulties.
6, in general, first of all, clean up the grooves on the debris, so that the filter plate grooves become smooth and neat; and then according to the instructions for the use of the repair agent, the repair agent will be uniformly applied to the grooves of the filter plate; and finally, the prepared leather strips will be set on the set and squeezed to make the two quickly bonded.
7, the process of bonding must ensure the flatness of the grooves, the filter plate and the leather strips firmly bonded together to complete the repair of the filter plate.
Filter Press Plate Frequently Asked Questions
A. What is the reason for the sprayed material between the filter plates
1,Caused by high feed pressure. Many users do not install pressure gauges on the feed pipe, resulting in uncontrolled feed pressure, which ultimately causes spraying.
2, the top tightness of the filter plate is not enough, after the feed pressure rises, the force between the filter plate will support the filter plate to cause spraying.
3,filter plateThe sealing surface has filter cake and other debris adhering to the surface, there is always a large gap after the filter plate is pressed, the sealing surface should be cleaned after removing the filter cake.
4. The sealing surface of the filter plate already has through grooves or the filter plate itself has been damaged.
B. How to solve the situation of water seepage and material running between filter plates, etc.
It may be that the feed pressure is too high, resulting in the material through the filtration rate is too high; or the hydraulic system of the hydraulic pressure is low; there is also the filter cloth folds and filter cloth on the hollow or sealing surface of the lumps; there is also a possibility is not in accordance with the provisions of the cleaning of the filter cloth, or the cleaning effect is not good enough to meet the requirements.
When the fault occurs, first of all should increase the corresponding compression pressure, next if the filter cloth or sealing surface problems, we must replace the filter cloth in time, clean the sealing surface of the debris, but also on time to clean the filter cloth; Finally, is to reduce the feed pressure to the normal value.
C. What is the cause of the low speed of movement of the filter plate
The guide rods are easily contaminated with oil, which can slow down the movement of the filter plate, or even the plate can't run along the track and go off course.
In the event of sluggish movement, the guide bars should be cleaned of stains, kept clean, and lubricated evenly so that the guide bars move more smoothly.
D. How to open the filter plate
Filter presses often fail to open or stop intermittently when performing release operations after blowing.
At this time, the first must make the filter plate release pressure relief in line with the pressure standard requirements, once the pressure is not fully completed pressure relief, due to the operation of the interlocking relationship, it will lead to problems with the filter plate release action.
If the system in a long time during operation due to excessive loss, the hydraulic oil is not timely replenished, it will make the system oil supply is insufficient, resulting in the continuity of the hydraulic cylinder work is not good, the phenomenon of intermittent.
F. Why the shape or thickness of the filter cake is not uniform
The reasons for this phenomenon may be, first of all, that the material supply is insufficient, or that the concentration of the material supply is too low, or, of course, that the components are blocked during operation.It should be in the condition of ensuring the normal operation and use of plate and frame, appropriately increase the amount of filtrate feed to ensure that the feed is sufficient;
If necessary, you can also consider upgrading the existing process to improve the quality of the material and ensure that the concentration of the material is within a reasonable range; at the same time, the drainage holes of the material in the plate and frame can also be cleaned regularly to ensure that the drainage pipeline is smooth;
Finally, in the process of forming the filter plate, increase the compression pressure to ensure that the cake is well formed.
G. What to do if the filter plate action is not synchronised during the filter press closure process?
filter pressWhen working, there is a locking and linkage relationship between its internal mechanical structure, once there is a closed operation after the filter plate does not act in time to check whether the unloading trolley is in the initial position.
If the unloading trolley does not move, the position does not change, then we should further check whether the initial position detection device is normal operation, detection device failure phenomenon should be promptly overhauled.
H, filter press hydraulic system noise causes and countermeasures
Filter presses in the process of pressing, the hydraulic system has a strange noise, mainly due to the system fasteners loose or hydraulic oil viscosity is too large.
System fasteners should be checked and tightened if loose. For hydraulic fluid with excessive viscosity, reducing its viscosity is sufficient.
L, using plate and frame filter press how to judge the sludge press dry
Theoretically it is not possible to press the sludge from a plate and frame filter press dry, it can only be understood as the end of this feeding process.
The feed pressure has reached the set feed pressure limit;Filter plate discharge is significantly reduced.If you want to further reduce the water content of the filter cake, you can take the following two ways:
Increase the feed pressure (provided that the hydraulic cylinder pressure is sufficient);Pass compressed air for blowing away the moisture.
J. What is the reason for the small pressure of the filter plate closure compression?
Plate and frame filter pressIn the actual operation process if there is a hydraulic station tank level is low, may be caused by the existence of hydraulic pipeline leakage points, at this time caused by the hydraulic station pressure loss;
For more information about the filter press plate, please contact us through the following ways.
Contact Us
Sales:181-181-000-11
Selection:188-517-18-517
Mailbox:suton@su-ton.com
Plate and frame chamber diaphragm filter presses
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