How much do you know about filter press?

Filter Press dividedBox filter press,Plate and frame filter press,Diaphragm filter press,Automatic filter press,Round filter pressEtc;

I. Components

Filter Press structure consists of three parts:

1, rack

Rack is filter press Base parts, both ends are thrust plate and compaction, on both sides of the beam will both with persistent up, beam to support sheets, lv kuang and pressing board. In order to meet the needs of advanced hygiene, the rack needs to be wrapped with stainless steel. The package stainless steel technology of Hangzhou Gerent can be used as a reference, and its quality can meet the needs of European customers.

A. Thrust Plate: it connects with the bearing to place one end of the filter press on the foundation. In the middle of the thrust plate of the box-type filter press is the feed hole, and there are four holes at four corners, the holes in the upper two corners are the inlet of washing liquid or squeezing gas, while the lower two corners are the outlet (undercurrent structure or the outlet of filtrate ).
B. Compressing plate: it is used to compressing the filter frame of the filter plate, and the rollers on both sides are used to support the compressing plate to roll on the track of the girder.
C. Girder: it is a load-bearing component. According to the anticorrosion requirements of the using environment, hard PVC, polypropylene, stainless steel coating or new anticorrosion coating can be chosen.

2. Compressing mechanism

Manual pressing, mechanical pressing and hydraulic pressing.

A. Manual pressing: push the pressing plate with spiral mechanical Jack to press the filter plate tightly.
B. Mechanical compaction: The compaction mechanism consists of electric motor (equipped with advanced overload protector) reducer, gear holder, screw rod and fixed nut. When compressing, the motor rotates forward, driving the reducer and the gear pair, making the lead screw rotate in the fixed silk thread, pushing the compressing plate to compact the filter plate and the filter frame. When the pressing force more and more large motor load current enlargement, when large to protector set current value when maximum pressure force, motor cut off the power, stop, because screw rod and fixed si mu with reliable self-locking helix angle, can reliably guarantee in the work process pressing state, back when motor reversal, when pressing board pressing block, contact stress to travel switch when back to stop.
C, hydraulic pressure: hydraulic pressing mechanism of the from the hydraulic station, cylinder, piston, piston rod and pressing board connection Havran card hydraulic station structure: motor, oil pump, relief valve (adjustable pressure) reversing valve, pressure gauge, circuit, tank. Hydraulic pressure when the machine is pressed, the hydraulic station supplies high pressure oil, and the component cavity consisting of oil cylinder and piston is filled with oil. When the pressure is greater than the friction resistance of the operation of the pressing plate, the pressing plate slowly presses the filter plate, when pressing reaches relief valve set pressure value (by pressure gauge pointer display) when, plate, lv kuang (frame) or filter plate (van) quilt compression, relief valve start unloading, then, cutting motor power, pressing action complete, return when reversing valve reversing, pressure oil into cylinder rod cavity, when oil pressure can overcome pressing board friction resistance when pressing board start returned. When the hydraulic pressure is automatic pressure maintaining, the pressing force is controlled by the electric contact pressure gauge. Set the upper limit pointer and the lower limit pointer of the pressure gauge at the numerical value required by the process. When the pressing force reaches the upper limit of the pressure gauge, when the power supply is cut off, the oil pump stops supplying power, and the pressure tightening force decreases due to the possible internal and external leakage of the oil circuit system. When it drops to the lower limit pointer of the pressure gauge, the power supply is switched on, and the oil pump starts to supply oil. When the pressure reaches the upper limit, when the power supply is cut off, the oil pump stops supplying oil, so as to achieve the effect of ensuring the tightening force in the process of filtering materials.

3, filter mechanism

Filter mechanism by filter plate, lv kuang, filter cloth, press diaphragm composition, filter plate on both sides by filter cloth coated, for configuration press diaphragm when a group filter plate by diaphragm plate and side panels. Diaphragm plate substrate sides coated with rubber diaphragm, diaphragm outside coated the filter cloth, side panel, the common filter plate. Material from thrust board when liao kong entry into the filter chamber, solid particles for its particle size greater than filter medium (filter cloth) aperture interception in filter chamber in, filtrate from the filter plate below the outlet liquid hole outflow. Filter cake need dry when remove for diaphragm press outer, also compressed air or steam, from washing port access, air flow rushed filter cake moisture in the, to reduce a cake of water content.

(1) filter way filtrate outflow way dividing unlike filter and undertow filtering.

A, unlike filtering: each filter plate below the outlet liquid hole women's tops with shui ju, filtrate intuitively from shui ju flow out in.
B undercurrent filtering: each plate in below with outlet fluid Channel way hole, several block plate in outlet liquid hole together into one outlet fluid Channel way, by thrust plate below the outlet liquid hole connected pipe discharge.

(2) washing cake need washing the sometimes flow one-way washing and two-way washing, undercurrent one-way washing and two-way washing.

A, unlike one-way wash is, lotion from thrust plate lotion intake and hole turn into, wear filter cloth again through the filter cake, from non-porous filter plate outflow when there was A orifice outlet liquid shui ju is off, no orifice outlet liquid shui ju is open.
B, unlike two-way wash is, lotion from thrust plate above on both sides of the fluid intake and hole twice washing that lotion first from one side washing up the other side washing, fluid of exit with the imported is diagonal direction, so called two-way cross-washing.
C undercurrent unidirectional flow polyester is, lotion from thrust plate lotion intake and hole turn into with orifice, wear filter cloth again through the filter cake, from non-porous filter plate outflow.
D undercurrent two-way wash is lotion from stop board above the two sides of the fluid intake and hole twice washing, the washing first from one side washing up the other side washing, fluid of exit is diagonal direction, so called undercurrent two-way cross-washing.

(3) filter cloth: filter cloth is a major filter media, filter cloth selection and use, to filter effect with decisive role, choose when used according to the filter materials PH, solid particle size etc. factors the appropriate choice of filter cloth material and aperture to ensure low filter cost, and high filtration efficiency, when used, to ensure filter cloth flat discount, aperture unimpeded.

Two, sewage treatment filter press assortment

Plate and frame filter press

By the alternating arranged filter board and lv kuang a group of filter chamber. Filter plate of the surface of groove, its convex parts to support filter cloth. Lv kuang and plate on the corners with through hole, after assembly form the complete channel, can the suspension, washing water and outgoing filtrate. Board, frame on each side of the handle occlusal rest on the beam, by pressing device pressing board, box. Board, frame between the filter cloth from the function of sealing gasket. By feed pump will suspension press filter chamber in filter cloth formed on residue, until full filter chamber. Filtrate wear filter cloth and along the plate groove flows to plate-and-frame corner channel, concentrated discharge. Filter., can access-cleaning washing water washing residue. After washing, sometimes also the compressed air, remove remaining washing liquid. Then open the filter press dismount residue, cleaning filter cloth, re-pressing board, frame, start the next cycle of work.

Plate and frame filter press for residue large compressibility or nearly incompressible suspension can apply. For the suspension of solid particles concentration is generally 10% the following, operating pressure is generally 0.3 ~ 0.6 MPa, special up to 3 MPa or higher. Filter area can used plate and frame number increase or decrease. Plate and Frame usually square, lv kuang the inner side length 200 ~ 2000mm, frame thick 16 ~ 80mm, filter area 0.5 ~ 1200 m. Plate and Frame for manual spiral, electric spiral and hydraulic etc. way pressing. Plate and Frame for wood, cast iron, cast steel, stainless steel, polypropylene and rubber materials.

Box filter press

Filter Press structure and working principle of and frame filter similar, the difference is that filter plate sides recessed, every two block filter plate combined into car-shaped filter chamber, save lv kuang, filter plate Center has round hole this inflows each filter chamber. This filter applies to need at higher pressure filter and filter residue don't need washing the suspension.

Vertical pressure filter

Filter plate horizontal and up and down overlay, form a group filter chamber, a compact footprint. It uses a continuous belt, complete the filter rear, mobile belt the unloading slag and cleaning belt, automatic operation. Filter Press wide application range, structure is simple. Plate and Frame of the compacted and pull unloading slag and cleaning filter cloth can implement automation operation, conducive to filter press to the large-scale development. Filter Press filter chamber in additional elastic rubber diaphragm rear, can filter end for high pressure water or compressed air with rubber diaphragm compression filter residue, to filter residue further press desoldering liquid, formation filter chamber volume variable, residue by compressed diaphragm press filter, its pressure up to 1 ~ 2 MPa.

Three, sewage treatment filter press installation debugging

1, filter press should be installed on a flat concrete basis. Feed end thrust plate ji jiao with anchor bolts fixed on; support end no anchor bolt, or anchor bolts positioning rear with two nut locking, nut gasket and machine feet between leave appropriate gap, this ji jiao can trace telescopic. Positioning front mounting staff should correction beam and thrust plate large plane's verticality.

2, foundation structure should by the building engineering staff by device load design, anchor bolt to reserve hole twice grouting is appropriate.

3, filter press around should have enough operation maintenance space hydraulic pressure filter press to select the appropriate position place hydraulic station, ensure hydraulic station can work properly.

4, by job requirements away filter plate, layout feed, washing, and drainage pipe line. Equipped with filter pressure show tables and control filter pressure backflow channel. So diaphragm squeeze-, the layout compressed air pipe run.

5, hydraulic filter press, hydraulic station fuel tank injection clean 20 #-40 # hydraulic oil use temperature>-5 °c; such as environmental temperature low, optional for similar viscosity, low freezing point of hydraulic oil. Hydraulic oil shall be subject to the 80-100 mesh strainer to join.

6, mechanical or hydraulic pressing device, power starter motor should work correctly. Hydraulic pressure in pressure gauge should be steady rise, hydraulic system no discharge phenomenon, according to models correct size adjusting hydraulic station working pressure, test machine rear found to fuel tank oil storage insufficient shall be refill.

Four-, sewage treatment filter press use maintenance small print

L, debug, normal filter press may feed work, per shift work front to machine a comprehensive inspection. Mechanical pressure transmission parts and gearbox must add the lubricating oil; hydraulic pressing review fuel tank oil storage volume and hydraulic station working pressure, hydraulic oil general once a year, when the replacement to hydraulic system-comprehensive cleaning, hydraulic station working pressure is less than cylinder maximum working pressure, but minimum cannot Under filter pressure allowed values, too small will cause large leakage, ever general assembly mechanical damage.

2, prohibited in filter plate less than the required amount of factory boot work, to avoid damage to parts. Feeding front Inspection filter plate alignment, filter cloth can't have folding phenomenon, prevent larger leakage; cake discharge rear plate must immediately pressing neatly arranged.

3, stay everything normal rear can pressing plate pressure filter, filter pressure and temperature must be within prescribed bounds, filter pressure is too high will cause leakage, filter high temperature plastic plate deformation, feeding when suspension to concentration evenly. There shall be no impurity; cake discharge rear filter cloth and filter plate to be flushed clean, not allowed residue paste in the sealing surface or feed channel inner, otherwise it will affect the feeding smooth and plate in sealing, thus phase causes filter plate sides pressure imbalance, lead to filter plate deformation damage.

4, filter cloth choice must match filter paddle filter technology requirements, new filter cloth making should be shrunk before, opening diameter should be less than filter plate aperture, supporting plate when hole plate hole should be relative concentric, feed hole cloth Jane should snap Wall, otherwise it will cause, filter can't, filtration rate low, cloth tube rupture, than expected filter objective to consequences.

5, filter press in pressure filtration early, filtering is cloudy, when filter cloth on form a layer cake after filtrate will clear. Such as filtrate always cloudy or with-cleaning cloudy, may be a filter cloth broken or hole plate hole deviation, the to close the valve or stop feeding replacement filter cloth. Filter plate between allowed filter cloth capillary phenomenon caused a small amount of leakage.

6, mobile filter plate when hard should be uniform appropriate, shall not collision, beat, so as to avoid damage to the sealing surface and filter wrench bar. Filter cloth after a period of use Harden performance decline, this is subject to regular inspection if you see existing change impact filtering rate phenomenon, the available corresponding low concentration ablc neutralized cleaning, to filter cloth recovery function, cannot recover the timely replacement.

7, slurry, lotion or compressed air valve, must by operating enabled, cannot be enabled at the same time, diaphragm squeeze when compressed air pressure cannot exceed filter pressure.

Five, sewage treatment filter press to the correct use

1, prohibited in filter plate less than the required amount of factory boot work, to avoid damage to parts. Feeding front Inspection filter plate alignment, filter cloth can't have folding phenomenon, prevent larger leakage; cake discharge rear plate must immediately pressing neatly arranged.

2, debug, normal filter press may feed work, per shift work front to machine a comprehensive inspection. Mechanical pressure transmission parts and gearbox must add the lubricating oil; hydraulic pressing review fuel tank oil storage volume and hydraulic station working pressure, hydraulic oil general once a year, when the replacement to hydraulic system-comprehensive cleaning, hydraulic station working pressure is less than cylinder maximum working pressure, but minimum cannot Under filter pressure allowed values, too small will cause large leakage, ever general assembly mechanical damage.

3, stay everything normal rear can pressing plate pressure filter, filter pressure and temperature must be within prescribed bounds, filter pressure is too high will cause leakage, filter high temperature plastic plate deformation, feeding when suspension to concentration evenly. There shall be no impurity; cake discharge rear filter cloth and filter plate to be flushed clean, not allowed residue paste in the sealing surface or feed channel inner, otherwise it will affect the feeding smooth and plate in sealing, thus phase causes filter plate sides pressure imbalance, lead to filter plate deformation damage.

4, filter cloth choice must match filter paddle filter technology requirements, new filter cloth making should be shrunk before, opening diameter should be less than filter plate aperture, supporting plate when hole plate hole should be relative concentric, feed hole cloth Jane should snap Wall, otherwise it will cause, filter can't, filtration rate low, cloth tube rupture, than expected filter objective to consequences.

5, filter press in pressure filtration early, filtering is cloudy, when filter cloth on form a layer cake after filtrate will clear. Such as filtrate always cloudy or with-cleaning cloudy, may be a filter cloth broken or hole plate hole deviation, the to close the valve or stop feeding replacement filter cloth. Filter plate between allowed filter cloth capillary phenomenon caused a small amount of leakage.