Related Manuals for VINCENT KP Series
Summary of Contents for VINCENT KP Series
- Page 1 Operation & Maintenance Manual KP-6 – KP-16 (Including KP-10L – KP-16L) Screw Press Vincent Corporation 2810 East 5th Avenue Tampa, FL 33605-5638 www.vincentcorp.com vincent@vincentcorp.com...
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Page 3: Table Of Contents
Screens…………………………………………………………………………... 15 Cord Cutter and Stripper Pins…………………………………………………… 16 Motor / Gearbox………………………………………………………………….17 A-plate Shaft Seal……………………………………………………………….. 17 Variable Frequency Drives (VFDs)……………………………………………... 18 Vincent Cone Timers (VCTs)……………………………………………………18 Start Up..........................19 Screw Speed (RPM) ......................19 Feeding the Press / Pre-Thickening.................20 Building a Plug.......................21 Additional Hints......................21... - Page 4 Instruments……………………………………………………………………….21 Stopping the Press………………………………………………………………..22 Double Pressing…………………………………………………………………. 22 Moisture Content………………………………………………………………... 22 Compression…………………………………………………………………….. 23 Measuring Throughput………………………………………………………….. 23 Screw Life………………………………………………………………………..24 Pie Cutting………………………………………………………………………. 24 Jamming / Plugging……………………………………………………………... 26 Screen Blinding…………………………………………………………………. 26 Channeling………………………………………………………………………. 27 Purging………………………………………………………………………….. 27 Bridging…………………………………………………………………………. 28 Fluid Injection……………………………………………………………………28 Polymer Usage…………………………………………………………………... 29 Press Aid………………………………………………………………………… 29 Hydrated Lime, Gypsum, and Alum……………………………………………..
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Page 5: Overview
Overview The Vincent KP Press consists of a screw rotating within a screen housing, a flanged inlet hopper, and a discharge opening. At the discharge end, the mouth of the screen housing is closed by a pneumatically actuated cone which moves back and forth on the screw shaft in proportion to the internal pressure in the screen frame. -
Page 6: Rigging
, 90 either way. Consult the gearbox manual or Vincent factory in these situations as it is likely that the oil level in the gearbox will have to be adjusted. Material can be fed into the press many ways. You may need to allow for return of overflow material if more is fed to the press than it can take. -
Page 7: Press Components
A variable frequency drive (VFD) programmed for either variable speed or auto-reversing may be required, depending on the application. If not, the use of a reversing starter switch is recommended; they cost only a little extra. Such a switch is handy for clearing a jammed press. -
Page 8: Discharge Cone
Air to cylinder Supply Vent Regulator 4-way Valve Discharge Cone The principal adjustment of the press is made with the discharge cone. The cone is the component at the cake discharge end of the press that acts as a door or stopper plug to restrict material from leaving the press. - Page 9 The duration of the "cone open" period is long enough to dump much of the press cake that has been formed. Vincent Cone Timer panels are available at a minimal cost.
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Page 10: Rotating Cone Option
whenever the press is turned off; this will normally clear on its own accord on restarting the press. To prevent a potential jam upon restarting, it is a good idea to open the cone for a few minutes prior to shutting down the press, after flow to the press has been stopped. Although there will be solids left in the press, they won't be highly compacted. -
Page 11: Four-Bar Mechanism
- KP-16 presses. These should be the high pressure (900 psi) electric or battery variety. Vincent provides these for critical applications, especially pulp & paper. Liquid leaking past the cone bushings drains out the back of the cone (at the air cylinder end of the press). -
Page 12: Screw / Screw Configurations
Spin Stop in Spout Screw / Screw Configurations Most Vincent screw presses use the Interrupted Flight Screw design. The interruptions leave room for stationary resistor teeth that are mounted outside of the screen. These teeth go through the screen and reach almost to the shaft of the screw. This design of screw press stands in contrast to a Continuous Screw design. -
Page 13: Wing Feeders
Screw with Tapered (Conical) Shaft All screws start with a feeder section of continuous flights. This picks up material in the inlet hopper and pushes it into the screen section. The feeder section ends at the first resistor tooth. This feeder section of the screw is followed by compression stages where the flights have reduced pitch. -
Page 14: Notches
Notching is easy to do while in the field, using a grinder with cutting wheel or a portable band saw. Typically, notching is done from the B-plate to the second resistor tooth. Many Vincent presses are supplied with notches. Grinding Notches on Screw Flights... -
Page 15: Screens
Sometimes resistor teeth are bent by tramp material so that they are hit by the screw flights. Grinding a little off such a tooth with an angle grinder is an acceptable alternative to trying to straighten a bent tooth. Screens The screen of the press is made either of wedgewire or profile bar (slotted screen) or perforated stainless sheet (round holes). -
Page 16: Cord Cutter And Stripper Pins
The most common damage to a wedgewire screen is for part of the surface to be smeared over from being rubbed by the screw. This rarely is bad enough to affect press performance. Profile bar screens generally work satisfactorily with 30% or even more of their surface smeared over. -
Page 17: Motor / Gearbox
Cord Cutter Motor / Gearbox Vincent presses are supplied complete with a motor. Standard motors are 60 Hz, Inverter Duty, TEFC, 230/460 V. We will supply whatever motor is called for where the press is headed, 575 V, 50 Hz, IEC, whatever. Motors used are standard, off the shelf motors, easily replaced if needed from your local motor distributor. -
Page 18: Variable Frequency Drives (Vfds)
A-Plate Seal Assemblies Variable Frequency Drives (VFDs) In this era of dropping costs, Vincent recommends the use of an inverter VFD to start, protect, and operate the screw press. With a VFD it is possible to establish the optimal combination of screw speed and discharge cone air pressure. The VFD also can be used to reverse the press in case of a jam or to slow it down or speed it up during upset conditions. -
Page 19: Start Up
Alternatively, the cone timer is used with slippery or slimy press cake that cannot be dewatered to sufficient firmness to force the cone open. Cone Timer panels are available from Vincent for a minimal cost. Start Up Check the inlet hopper first. Sometimes debris (or this owner's manual) ends up in the inlet hopper. -
Page 20: Feeding The Press / Pre-Thickening
A port on the side of the inlet hopper is frequently provided on larger Vincent presses. It is used to view the level of material over the screw. It has a bolted cover because it is rarely used. -
Page 21: Building A Plug
tailings (solids) from the screen can be funneled into the press. This arrangement is desirable when the feed to the press is dilute. We're often asked what the optimal feed consistency is. It's different in just about every application, but with fibrous material, we've had success with consistency as low as 1% solids. -
Page 22: Stopping The Press
being done; the screen is blinded, low compression is taking place, or the flow into the press has stopped. In the case of pressing liquids that contain dissolved sugars or salts, a refractometer is valuable for assessing press performance. The Brix of the inbound flow, the press cake, and the press liquor will all be the same figure. -
Page 23: Compression
cake. Either way, it's a measure of the same thing, just from a different angle. When thinking of how dry something is, keep in mind that pine bark is 55% solids (45% water). A screw press separates free water. This will leave organic water in the press cake. The organic water is either bound to, or part of, the animal or vegetable molecules. -
Page 24: Screw Life
This can cause the flights to act like a putty knife, plastering solids against the screen, preventing water from coming through. Worn screws are either restored locally or returned to Vincent for rebuilding. The maximum cost of a screw rebuild is around one third the cost of a new screw. - Page 25 Pie Cutting (continued) Not Pie Cut Pie Cut...
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Page 26: Jamming / Plugging
Jamming / Plugging Definitions: Vincent speaks of jamming when a press stops and the motor trips out, typically when the material inside the press is getting very, very dry. Plugging is used to describe when the press continues to run, but solids stop moving through the press. -
Page 27: Channeling
when the screen starts to blind. This is one of the easiest possible solutions to test. Sometimes it is the only one that is effective. Many other methods are used to address blinding: 1. Adding notches to the screw 2. Reducing or eliminating pressure in the inlet hopper 3. -
Page 28: Bridging
Steam injection works well on pineapple skin, citrus waste, and raw fish. Tests run with steam injection in a Vincent press at Anheuser-Busch showed little benefit. The material being pressed, spent grain, had already been "cooked"... -
Page 29: Polymer Usage
A reaction time of several minutes must be allowed prior to pressing. Lime has been used successfully in the same manner with potato, onion, tomato, and pineapple waste. It works well on acidic materials such as strawberries and coffee bean pulp. Vincent offers lime dosing equipment. -
Page 30: Maintenance
It is unusual that the outside of the screen ever needs to be cleaned. Spray systems for this can be built into the press at the Vincent factory. Alternatively, a pressure washer or swabbing with acid solution can be used. -
Page 31: Screen Removal And Replacement
Prussian Blue can be useful in finding the spot that is rubbing. Screen Removal and Replacement Wedgewire screens in Vincent presses can be reversed in order to achieve double life. That is, wear starts at the cake discharge end of the press. When this occurs, the screen can be turned 180 so that the fresh inlet section is then in the discharge area. -
Page 32: Screw Removal And Replacement
Remove the discharge cone and its actuator mechanism. (Be careful not to pinch a finger when removing the lever arm mechanism.) Remove the resistor bar. Loosen the bolts holding the clamshell closed. (It is not necessary to remove them.) ... -
Page 33: Lubrication
Adapter Plate and the A-plate. The stub shaft can then be bored out in a large boring mill, and the screw can be repaired at the Vincent factory. When reinstalling a screw, the screw must be pulled in until the step in the shaft seats against the thrust bearing of the gearbox. - Page 34 The air regulator used with the discharge cone air cylinder may have a lubricant jar. If so, Vincent includes a can of light oil along with the air regulator which comes with our screw presses. The jar should be filled when placing the press in service and when the jar is empty, about once a year.
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Page 35: Maintenance Checklist
Maintenance Checklist KP-6 – KP-16 # from Nomenclature Every Annu- Drawing Item Monthly needed ally Motor - Check for any blockage of fan from dust Gearbox Adapter - replace lubricator (if equipped) Gearbox - Test oil. Change if needed. Seal Plate Assembly - Lubricate one shot of grease Seal Plate Assembly - Look for leakage Screw - Based on abrasiveness of product... -
Page 37: Drawing For Mounting Kp-6 On Stand
Recommended Mounting of KP-6 on Stand...
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