Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
  • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
  • B03B4/00—Separating by pneumatic tables or by pneumatic jigs
  • B03B4/02—Separating by pneumatic tables or by pneumatic jigs using swinging or shaking tables
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
  • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
  • B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
  • B07B9/02—Combinations of similar or different apparatus for separating solids from solids using gas currents

Definitions

• the invention relates to a process for separating grain mixture, e.g. for reading out heavy admixtures such as stones from grain material, in which the material is directed in a layered manner over an inclined, air-flowing, vibrating layer table surface, and the layer air is conducted as recirculated air.
• a grain separating device operating in recirculation mode which essentially consists of a vibrating table surface and a stationary box that completely encloses the table surface.
• the stationary box In its lower area, the stationary box has a fan, by means of which the air is blown upwards through the table surface. The air flowing out from the top of the table surface is directed laterally between the swinging table surface and the walls of the stationary box back into the fan inlet. The air is circulated. This is called recirculation mode.
• This has the great advantage that complex aspiration systems with appropriate filter devices for the stratified air. The fact is, however, that to date these air circulation systems have only been able to establish themselves to a very limited extent.
• the actually unsolved point was the accumulation of dust, dirt and shell parts within the stationary box.
• the type of devices mentioned is predominantly those for separating grain and other seeds from third-party stock, for example 1-2% third-party stock is quite common.
• throughputs of, for example, 5 to 20 tons per hour, there are also large quantities for the annoying small stock. Therefore forced air systems provide to the operator "higher requirements, due to higher expenses for cleaning, otherwise they are problematic from a hygienic point of the theoretical advantages therefore remained only major practical drawbacks often occurred in the known Um Kunststoffap- Paraten dust-laden air into the environment.. off because the pressure conditions were not adequately controlled.
• the invention has for its object a new in To create a circulating air separation process that allows a high throughput while reducing the disadvantages of the known solutions as much as possible.
• the invention is achieved in a generic method in that the circulating air used for the stratification of the material is passed through separate guides for the supply and exhaust air, the. Guides are placed in common vibrations with the shift table surface.
• the invention has the advantage of a high separation quality, simple construction and clean operation.
• a particularly surprising advantage for the vibrating unit has been the attachment of the product feeder in the area of the higher table end and the air extraction, for example in the middle area above the bed table, and the air recirculation over the lower area of the bed table.
• Each of the functions can be geared to the maximum, which until now was only possible with the best individual machines without air circulation.
• the cascading, oscillating product feed or product feed, widened from top to bottom, ensures full expansion and loosening of the product right from the start, while at the same time functioning as an airlock.
• the installation of the product feed cascade in the area of the The higher end of the table ensures unobstructed and therefore manageable flow conditions not only through but also above the entire shift table area.
• the air recirculation in the form of a circulating air supply duct which is guided around the lower end of the table and opens out below this, also ensures optimal flow conditions. However, it is also very particularly important that the circulating air is guided from shift to shift operation without jolts and essentially without swirls.
• the recirculated air can now, depending on demand, be cleaned in stationary devices arranged ⁇ . Since the air in question remains in the circuit, mechanical cleaning without filtering is sufficient. However, it is also possible to pass only a small proportion of the circulating air into a dust filter. This also has the advantage that the entire system remains under negative pressure to the outside.
• the invention further relates to a device for separating grain mixtures, in particular for reading out heavy admixtures, such as stones from grain material, with an air-flowed, oscillatable, inclined shift table with air guides for circulating air operation of the device, and is characterized in that the shift table and the guides for air extraction and air recirculation form a vibrating box.
• a very particularly advantageous design idea is that one or two table surfaces can be attached in the same swinging box, the lower table taking over part of the goods of the upper table, and the product transfer can preferably take place at the higher table end.
• the upper table surface can also - possibly even additionally - have a trough-shaped depression (stone or manor swamp) with through-openings in the trough bottom to separate the product flow into a heavy and a light fraction in its lower area.
• a trough-shaped depression stone or manor swamp
• through-openings in the trough bottom to separate the product flow into a heavy and a light fraction in its lower area.
• the transfer of goods from the upper to the lower table takes place via a slide arranged in the opposite direction to the main flow direction of the upper table, which slide onto the lower table flows.
• FIG. 1 shows the simplest form of a small table reader for stones
• FIG. 2 shows the product feed on the shift table
• FIG. 4 shows a solution according to FIG. 1, but with a circulating air duct
• FIG. 5 shows a solution according to FIG. 3, but with a U air duct
• FIG. 6 shows the FIG. 5 with circulating air separator
• FIG. 7 is a solution similar to FIG. 3 with the additional formation of two heavy fractions in addition to the
• FIG. 9 shows a stone sump on the layered table surface
• FIG. 10 shows the device as in FIGS. 3, 7 and 8 with the recirculated air duct led through the box.
• 1 shows a basic type for a new stone reader 1, the fresh grain being passed through an inlet 2 to a shift table 3 and from there as cleaned grain via an outlet 4 1 is discharged.
• a closed hood 5 is arranged above the shift table 3 and has a suction opening 6.
• the hood 5 forms, together with the shift table 3, an oscillation device 7, which can be set in motion by a vibration exciter 8 with an oscillation component in the direction of the upper end of the shift table 3.
• the upper end of the layer table 3 is formed by a guide plate 19 as the end separation zone.
• the whole vibrating unit 7 is supported by spring elements 9 to 10 on a frame 10 which is fixed on a floor 11.
• a non-vibrating head piece 12 fixed to the frame 10 is a non-vibrating head piece 12, in which the inlet 2 and an air suction line 13 are attached.
• an air quantity adjusting flap 14 for adjusting the air aspirated by the entire stone reader 1 is arranged in the air suction line 13.
• the connection of the vibrating parts, or the vibrating unit 7 and the head piece 12, takes place via flexible sleeves 15, which are arranged after the inlet 2.

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• Combined Means For Separation Of Solids (AREA)

Priority Applications (3)

Applications Claiming Priority (4)

Publications (1)

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ID=25686687

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Citations (7)

• 1988
  • 1988-11-25 CZ CS887782A patent/CZ280323B6/cs not_active IP Right Cessation
  • 1988-11-25 SK SK7782-88A patent/SK778288A3/sk unknown
  • 1988-11-28 DE DE8888119820T patent/DE3873035D1/de not_active Expired - Fee Related
  • 1988-11-28 WO PCT/EP1988/001079 patent/WO1989004722A1/de unknown
  • 1988-11-28 BR BR888807331A patent/BR8807331A/pt not_active IP Right Cessation
  • 1988-11-28 EP EP88119819A patent/EP0318053B1/de not_active Expired - Lifetime
  • 1988-11-28 DE DE88119819T patent/DE3887834D1/de not_active Expired - Fee Related
  • 1988-11-28 HU HU893383A patent/HU208501B/hu not_active IP Right Cessation
  • 1988-11-28 KR KR1019890701391A patent/KR940006018B1/ko not_active IP Right Cessation
  • 1988-11-28 JP JP1500049A patent/JP2530736B2/ja not_active Expired - Lifetime
  • 1988-11-28 ES ES88119819T patent/ES2049741T3/es not_active Expired - Lifetime
  • 1988-11-28 BR BR888807330A patent/BR8807330A/pt not_active IP Right Cessation
  • 1988-11-28 AU AU28104/89A patent/AU612451B2/en not_active Ceased
  • 1988-11-28 EP EP88119820A patent/EP0318054B1/de not_active Expired - Lifetime
  • 1988-11-28 PL PL1988276049A patent/PL161158B1/pl unknown
  • 1988-11-28 ES ES198888119820T patent/ES2033403T3/es not_active Expired - Lifetime
  • 1988-11-28 CN CN88109223A patent/CN1014870B/zh not_active Expired
  • 1988-11-28 WO PCT/EP1988/001078 patent/WO1989004721A1/de unknown
  • 1988-11-28 HU HU886800A patent/HU204449B/hu not_active IP Right Cessation
  • 1988-11-28 AU AU28082/89A patent/AU612759B2/en not_active Ceased
  • 1988-11-28 JP JP1500048A patent/JP2525493B2/ja not_active Expired - Lifetime
• 1989
  • 1989-07-24 KR KR89071390A patent/KR950011184B1/ko not_active IP Right Cessation

Patent Citations (7)

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