Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B30—PRESSES
  • B30B—PRESSES IN GENERAL
  • B30B9/00—Presses specially adapted for particular purposes
  • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
  • B30B9/04—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams
  • B30B9/047—Control arrangements
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B30—PRESSES
  • B30B—PRESSES IN GENERAL
  • B30B9/00—Presses specially adapted for particular purposes
  • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
  • B30B9/04—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B30—PRESSES
  • B30B—PRESSES IN GENERAL
  • B30B9/00—Presses specially adapted for particular purposes
  • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
  • B30B9/22—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using a flexible member, e.g. diaphragm, urged by fluid pressure

Definitions

• the invention relates to a method for determining and using the filling quantities of pressed material in the solid-liquid separation with a filter press comprising a press chamber in which liquid is pressed out of pressed material under the action of a press element subjected to pressure by means of several successive lifting processes, during the course of a filling phase of
• a filling quantity is introduced into the pressing chamber in each lifting process.
• Presses are discharged to the outside via filters.
• the pressure is applied directly to the food by a rigid pressure plate or pneumatically or hydraulically via a flexible membrane.
• a rigid pressure plate or pneumatically or hydraulically via a flexible membrane.
• the question arises as to what quantity has to be pre-filled in the press so that there is a press cushion sufficient for a first pressing. It should be noted that when the pressure plate or membrane is in front, the ratio between the effective filter area and the current volume of the press space is greater than when the press element is retracted.
• the pre-fill quantity has a very negative effect on the yield / performance.
• the invention is therefore based on the object of eliminating the stated problems by means of an optimized method for determining and using the filling quantities of press material in a filter press.
• the solution to this problem is achieved by the following steps: 1) a measurement and filling process is used to carry out a filling and pressing process which, in the yield / power diagram, corresponds to a first operating point with known power and
• Yield leads; 2) for at least one subsequent second filling and pressing operation, which leads to a second operating point in the yield / performance diagram, we at least one process size for the second operating point and then using relationships for the changes in performance and yield in the solid-liquid separation the filling and pressing processes with the interposition of a fictitious working point determines and uses a filling quantity which is necessary so that a maximum product of
• FIG. 1 shows a schematic section through a filter press with a free piston along with a graphical representation of the time course of piston strokes and supply of the press material in the case of different control processes
• FIG. 2 shows a schematic section through a filter press with free-moving pistons along with a graphical representation of the chronological course of piston strokes and feeding of the pressed material in further control processes
• FIG. 1 shows a horizontal filter piston of the known type. It comprises a press jacket 11. Inside the press jacket 11 there is a press piston 6 which is attached to a piston rod 14. The piston rod 14 is in a hydraulic
• Cylinder is movably mounted and carries out the pressing operations via the pressing piston 6.
• the material to be pressed 7, which penetrates a plurality of drainage elements not shown, is introduced into the press jacket 11 via a closable filler opening by means of a pump 8.
• the drainage elements conduct the liquid phase of the material to be pressed 7 to the outside into a drain line 10 under the pressure effect of the pressing piston 6.
• the pressed material can be fruit and the liquid phase can therefore be fruit juice.
• the entire press unit shown in FIG. 1 is rotated about the central axis
• the "pre-filling" process is ended as soon as the press piston 6 no longer reaches the position HS during its advance. Then, in a subsequent step, the filling is only carried out in discontinuous phases, each of which begins with the retraction of the press piston 6. First of all, a filling control ensures that the press piston 6 always reaches an identical end position lying in front of the HS with each lifting operation.
• the press piston 6 reaches positions which progressively fill from the HS as the press space fills up.
• FIG. 2 shows, in a representation similar to FIG. 1, in which the same reference numerals indicate the same functions, separate filling and pressing processes.
• a working point denoted by 1 in FIG. 3 corresponds to an instantaneous operating state of the press as it rode within a sequence of individual pressings of the type described for FIGS. 1 and 2 immediately after the end of a lifting operation.
• the press piston 6 is still in the press position at working point 1, but the working press pressure has already been reduced.
• the previous cubing process started in working point 1 '.
• the working points 1 ', 1 differ only in this cubing process. If a certain filling quantity of pressed material is fed into the working point 1, the working point 1 changes into a working point 3 ', the power L increasing and the yield A decreasing.
• FIG. 4 shows a straight-line course of the pressing characteristics in the course of several pure pressing processes. It has
• FIG. 5 shows a comparison of the power-yield combinations which can be achieved with different controls for the pressing processes.
• the pressing process R2 shows a control with the goal of a constant power with approximately sufficient refilling power.
• the course b shows a press step with insufficient refilling.
• the course a finally shows three parts, which result in succession b constant end position of the pressing element for each pressing stroke, with constant yield and finally after the end of the filling.
• 6 shows in the yield / performance diagram the course of a single pressing operation, in which the performance is kept constant between the working points 1 at the beginning and 4 at the end. One can see an improvement in the product of performance and yield.
• FIG. 7 shows in the yield / performance diagram the course of an individual freezing process in which the quantity of pressed material supplied is determined between the working points 1 at the beginning and 4 at the end, so that the yield is kept constant. If the goods can be pressed differently, a point 4 with greater performance to the right of point 1 can also result.
• FIG. 8 shows in the yield / performance diagram the course of a pre-pressing process in which no pre-pressing is carried out during a pre-pressing process which follows the pre-filling R1 and comprises several piston strokes. This process was described in relation to FIG. 2.
• a pre-press-free is connected to the pre-press
• FIG. 9 shows how the influence of a replenishment quantity supplied can be determined in the yield / performance diagram by a theoretical consideration. Similar to FIG. 3, the operating point 1 corresponds to the current operating state immediately after the end of a single previous press stroke. The press piston 6 (FIG. 1) is still in the press position HS, but the press pressure has already been reduced. Due to the refill quantity
• A2 AI (G1 / G2) (1)
• A4 A0 - ((L4 / L3) * (A0-A3)) (4)
• FIG. 10 shows, similar to FIGS. 3 and 9, in a yield / performance diagram the operating points which result if the condition 4 is reached for the second operating point 4 reached from working point 1 by a single filling and lifting process, that is, the associated ones Values of Yield A4 and power L4 of this working point 4 define a point 4 on the connecting straight line between the first working point 1 and a working point AF on the yield axis, which corresponds to a fixed maximum theoretical yield value for the press material in question.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Control Of Presses (AREA)
• Sampling And Sample Adjustment (AREA)
• Soy Sauces And Products Related Thereto (AREA)
• Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
• Filtration Of Liquid (AREA)
• Non-Alcoholic Beverages (AREA)
• Basic Packing Technique (AREA)
• Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
• Separation By Low-Temperature Treatments (AREA)
• Crystals, And After-Treatments Of Crystals (AREA)
• Press Drives And Press Lines (AREA)
• Extrusion Moulding Of Plastics Or The Like (AREA)

Priority Applications (1)

Applications Claiming Priority (3)

Publications (2)

Family

ID=4198847

Family Applications (1)

Country Status (24)

Families Citing this family (4)

Family Cites Families (14)

• 1994
  • 1994-03-30 CH CH00946/94A patent/CH689381A5/de not_active IP Right Cessation
• 1995
  • 1995-03-21 WO PCT/CH1995/000062 patent/WO1995026874A1/fr not_active Ceased
  • 1995-03-21 AU AU18878/95A patent/AU681947B2/en not_active Ceased
  • 1995-03-21 PL PL95311196A patent/PL178564B1/pl not_active IP Right Cessation
  • 1995-03-21 ES ES95911183T patent/ES2123961T3/es not_active Expired - Lifetime
  • 1995-03-21 SK SK1437-95A patent/SK281001B6/sk not_active IP Right Cessation
  • 1995-03-21 MD MD95-0444A patent/MD950444A/ro unknown
  • 1995-03-21 JP JP52532695A patent/JP3633623B2/ja not_active Expired - Fee Related
  • 1995-03-21 NZ NZ281909A patent/NZ281909A/en unknown
  • 1995-03-21 DE DE59503840T patent/DE59503840D1/de not_active Expired - Lifetime
  • 1995-03-21 CZ CZ952909A patent/CZ284424B6/cs not_active IP Right Cessation
  • 1995-03-21 AT AT95911183T patent/ATE171893T1/de active
  • 1995-03-21 RU RU95122564A patent/RU2127193C1/ru not_active IP Right Cessation
  • 1995-03-21 EP EP95911183A patent/EP0701507B1/fr not_active Expired - Lifetime
  • 1995-03-21 CA CA002163971A patent/CA2163971C/fr not_active Expired - Fee Related
  • 1995-03-21 HU HU9503400A patent/HU215633B/hu not_active IP Right Cessation
  • 1995-03-21 CN CN95190250A patent/CN1061601C/zh not_active Expired - Fee Related
  • 1995-03-21 SI SI9530176T patent/SI0701507T1/xx unknown
  • 1995-03-21 BR BR9505797A patent/BR9505797A/pt not_active IP Right Cessation
  • 1995-03-21 US US08/553,337 patent/US5575200A/en not_active Expired - Lifetime
  • 1995-03-28 TR TR00325/95A patent/TR28738A/xx unknown
  • 1995-03-29 HR HR00946/94-7A patent/HRP950165A2/xx not_active Application Discontinuation
  • 1995-03-29 YU YU19995A patent/YU19995A/sh unknown
  • 1995-03-30 ZA ZA952551A patent/ZA952551B/xx unknown

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events