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3-DEM® Transfer Point Curve Chute Technology

Source:Hubei creating     Author:     Pubdate:2014-11-18     View:1562

Application of 3-DEM® Curve Chute Technology makes the flow of materials in Chute orderly, avoids producing dust caused by collision of the materials, ensures absolute alignment of the material on the belt, and prevents disalignment of the belt caused by uneven material, thus reducing material impact failure to the equipment, putting an end to tearing the belt, reducing noise, preventing material blockade, and inhibiting generation of dust. Implementation of 3-DEM® Curve Chute Technology can cancel Buffer Air Lock, optimize the structure of Chute, and reduce the project cost. Besides, it can also increase the service life of the equipment, reduce the gallery flushing times, save water, ensure clean gallery environment, increase the service life of the equipment of Transfer Point , and greatly reduce the running and maintenance cost.

Design and type selection of Top Hopper, Chute, Buffer Unit, Electric Y Pipe, Buffer Manifold of Bulk Material Belt Conveyer Transfer Point System shall always comply with Typical Design and Selection Manual for Belt Conveyer with the traditional design philosophy of reducing equipment wear by forming "material grinding material" in Chute and decreasing the material flow speed by means of the material impacting Chute to reduce the material impact on the belt; although traditional design philosophy of "material grinding material" can partly reduce material impact the belt and wear of partial equipment, it will severely impact Chute, Buffer Air Lock, Electric Y Chute during the material handling, reduce the service life of equipment, and cause poor sealing of Chute Wall for material falling point and severe powder leakage; mutual impact of bulk materials and impact between materials and Chute result in material leakage and serious dust emission, thereby forming poor working condition of Transfer Point. Disalignment of materials at material falling points on the belt will cause disalignment of the belt, thus resulting in belt wear and tearing, high running and maintenance cost caused by frequent equipment failures, waste of water caused by frequent gallery flushing. Design of "material grinding material" causes severe Chute blockage when conveying materials of high moisture content, which significantly constraints the conveying efficiency of the system.

 3-DEM® Transfer Point Curve Chute Technology 

Fast falling bulk materials in Chute shear air and form induced air. Impact to the belt or Chute corners easily causes accumulation and blockage of materials, material leakage and dust emission, and primary dust caused by impact and squeeze between materials will form more severe dust at material falling points under the action of induced air.

Although the "material grinding material" design at the Top Hopper reduces the wear of materials to the Hopper, it causes accumulation and blockage of materials, material leakage and dust emission, in addition, "collapse" of stacking materials causes instant severe overload of subsequent belts and further results in material dripping, and materials in the  Top Hopper fall scattered and disorderly falling of materials in the Top Hopper results in that it is difficult to switch Y Pipe plate and easily causes blockage of  Top Hopper.

For  ordinary Chute, the corners are prone to blockage, the underlying cause is not because of low material speed and insufficient angle of repose, but because that the locations prone to blockage are based on traditional design guide of "material grinding material" so that the fine materials flow at about 0 m/s at the corners, stick to Chute, and the stuck materials further stick stronger, causing blockage, material leakage and dust emission.

Material falling dispersedly will cause disalignment of materials on the belt, and further disalignment of belt, which will intensify the wear of Chute Wall and Conveyor Skirting, and cause material leakage and serious dust emission.

Basicprinciple of 3-DEM® Transfer Point Curve Chute Technology:

Basedon discrete element method, 3-DEM® Curve Chute Technology adopts SolidWorks 3D design and 3D modeling technology to conduct true simulation to the behavior characteristics of the particulate system during conveying the bulk material with the help of advanced EDEM so as to help the designers to design, test and optimize bulk material handling equipment. Equipped with Curve Material Diversion Equipment on the top, 3-DEM® Curve Chute can make the materials gradually contact with diversion baffle plate with a smaller angle of impact (theoretical digging angle < 30°) to reduce the material impact to the baffle plate; Chute body adopts curve streamline structure, and generally adopts "U" shaped or round section; the outlet adopts variable cross section spoon structure which expands forward, goes deep into Chute Wall, and about 150-350mm away from the bottom of the belt. 3-DEM® Curve Chute Technology can reduce impact, prevent Chute blockage, inhibit induced air, and reduce dust concentration by collecting material and controlling disorderly bulk materials. 3-DEM® Curve Chute Technology ensures that materials will go to subsequent belt parallel to the current belt at a speed close to that of the current belt, can reduce material impact on the belt, put an end to belt tearing, and ensure material disalignment with the belt, thus improving the conveying efficiency of the belt.

Design theory of 3-DEM® Curve Chute Technology:

1. Curve Chute Technology is a targeted non-standard design based on forms of layout of  Transfer Point;

2. Design of Curve Chute is to ensure the materials flow together by optimizing the radian and cross section of Chute;

3. Curve Chute is designed to ensure that the angle of impact between the materials and any part of Chute< 30°;

4. Curve Chute is designed to ensure that the materials will not directly impact subsequent belt, and that the materials must slide onto the belt through Chute;

5. Curve Chute is designed to ensure that the materials fed on subsequent belt are centered, and that material impact to the belt should be reduced as much as possible;

6. Curve Chute is designed to inhibit the formation of induced air through changing Chute section and the material direction so as to reduce dust emission;