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Chemical
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Dose
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Controller
Overview
The AguaClara Dose Controller is a critical piece of the technology. It has evolved steadily with major advances every year. The ability to accurately and predictably control the alum and chlorine dosages without using electricity sets the AguaClara technology apart from previous technologies. Our Dose Controller technology that couples plant flow rate and chemical dose is novel.
Figure 1: General Schematic of Chemical Dose Controller|align=centre,width=32,height=32
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In
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the
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latest
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design,
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the
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makes
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it
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possible
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for
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an
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operator
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to
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set
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the
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chemical
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dose
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without
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referring
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to
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any
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tables.
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This
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could
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be
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a
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significant
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advantage.
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The
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disadvantage
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is
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that
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this
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design
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is
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more
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complex
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and
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thus
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we
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will
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need
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to
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work
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this
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carefully
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to
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ensure
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that
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the
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CDC
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technology
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is
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sustainable.
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Current
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Research
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Team
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- The
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- summer
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- research
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- team
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- will
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- serve
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- to
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- validate
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- the
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- Nonlinear
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- Chemical
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- Doser
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- by
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- measuring
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- both
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- precision
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- and
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- accuracy.
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- A
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- battery
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- of
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- tests
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- will
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- be
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- performed
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- to
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- determine
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- the
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- best
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- manufacturing
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- techniques,
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- document
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- surface
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- tension
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- issues
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- and
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- to
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- determine
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- if
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- material
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- selection
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- plays
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- a
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- role
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- in
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- accuracy
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- or
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- precision.
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- The
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- team
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- will
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- also
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- investigate
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- various
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- materials
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- and
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- determine
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- the
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- most
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- appropriate
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- components
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- to
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- use.
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- The
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- team
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- will
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- document
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- and
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- standardize
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- these
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- components
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- so
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- that
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- end
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- users
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- can
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- either
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- obtain
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- them
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- locally
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- or
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- understand
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- when
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- parts
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- may
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- need
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- to
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- come
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- from
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- an
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- outside
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- source
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- with
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- the
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- idea
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- being
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- to
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- limit
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- the
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- parts
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- coming
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- from
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- outside
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- sources.
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Future
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Research
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Goals
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- This
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- research
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- team
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- will
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- continue
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- to
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- improve
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- on
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- the
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- design
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- of
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- the
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- Nonlinear
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- Dose
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- Controller
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- (NDC)
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- that
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- was
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- developed
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- during
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- the
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- Academic
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- Year
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- 2009/2010.
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- This
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- team
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- will
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- continue
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- with
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- validation
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- studies
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- completed
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- during
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- the
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- Summer
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- 2010
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- term.
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- The
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- fundamental
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- design
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- of
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- the
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- NDC
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- will
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- be
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- changed
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- to
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- accommodate
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- dosing
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- all
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- process
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- chemicals.
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- Additionally,
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- as
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- the
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- design
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- and
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- components
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- are
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- finalized,
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- this
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- information
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- needs
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- to
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- be
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- incorporated
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- into
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- the
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- Automated
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- Design
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- Tool.
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Past
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Research
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Teams
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- Redesigning a chemical doser with a precise nonlinear chemical dose response to changes in plant flow while also minimizing aeration in an attempt in prevent surface foams.
Summer 2009 Research: Surface Foam Formation
- Trying to model the surface foam formation that takes place at the end of rapid mix in current plants and come up with a retrofit design that will minimize air entrainment.
Linear Chemical Dose Controller
- The linear dose controller uses major losses to adjust chemical doses to the plant as raw water flow rates change.
Nonlinear Chemical Dose Controller Fall08-Summer09
- Major losses cannot be used to adjust chemical flow rates when flow in the dosing tube is turbulent. Therefore, a chemical doser with a precise nonlinear chemical dose response to changes in plant flow is being designed.
Rapid Mix Chamber Design Program
- The design of the entrance tank for high flow rate plants such as Gracias.