• Created by user-8da17, last modified by user-4b5d1 on Oct 26, 2009

You are viewing an old version of this page. View the current version.

Compare with Current View Page History

« Previous Version 3 Next »

Prototype Doser Frame

Abstract

A full scale proto-type is being created.  This model will allow us to run full flow/ full scale accuracy tests in the lab. Additionally, this model will be taken to the EP3 conference this spring.

Proto-type Design

  • Monica Hill
  • Harrison
  • Akta
  • The proto-type is made up of two sections: the structural frame work and the moving lever-arm.  All components will be fabricated using a modular aluminum framing system manufactured by a company called 80/20.  Affectionately called "The Industrial Erector Set," this company offers a wide variety of components along with an Auto-cad plug-in of each of their components.  With these tools, we have been able to design and evaluate multiple proto-types.
  • The structural framework is designed with the same dimensions as the entrance tank except actual tank measures 1 meter x 1 meter and our framework is 1 meter by ½ meter. This was done only as a space saving measure.  The height of our framework however is the same as the height of the entrance tank. Entrance tanks dimensions are based off the relationship between the design flow rate through the plant and the orifice. We also need to accommodate the length of the rapid-mix tube and approximately *** feet of free board. (If no one else is showing these calculations, I can put them here, or we can include them elsewhere).
  •  In addition, the frame work includes a table to hold a small stock tank and another table to hold the constant-flow device.  Ideally, there should be 30 cm between the orifice and the low water lever of the stock tank.  This dimension has been taken into account in our design.
  • We have designed three different lever systems with the current-final lever presented here. There are a number of constraints in the design of this lever arm.  First, we need to facilitate a way to attach the floats and counter-weight.  Secondly, we must have a way to adjust the distance the orifice travels down the arm.  It was also requested that the operators be given a means to manually "shut off" the flow.   There was another request to have a second slide to facilitate attaching a second dosing pH control system.
  • As shown on this system, all of the above listed constraints can be met.  We are using a slide mechanism that has a manual "brake" that allows the slide to be clamped in any position.  There are slides on both sides of the lever to allow both alum and lime dosing.  Each slide can be moved independently and can be moved to the center line to allow the operator to secure flow if needed. The floats and weights will be attached via the brackets at the endpoints.  
  • A material list has been created which lists each of these components, part number, quantity and associated fasteners.  This material list needs to be updated to reflect our most recent design once this design has been approved by all members of the team.  At that point, the design will be sent out for pricing and the components will be ordered.  Upon arrival of the parts, we will be able to build our full scale model, attach the hydraulic components and begin testing.

BLah - ignore the stuff written below, it's part of the template

  • (Place Challenge here)
    • (Who is working on this, approximately when will they work on it?)
  • (Place Challenge here)
    • (Who is working on this, approximately when will they work on it?)
  • (Place Challenge here)
    • (Who is working on this, approximately when will they work on it?)

Bibliography

List references for your project that your team has found in literature searches.

Deliverables

What do you plan on "handing in" by the end of the semester? Designs, programs, separate reports for publication, etc.

  •  
  •  
  •  
  • No labels