Spent solution concentrators working by water evaporation and subsequent condensation as distillate.
 
Heat Pump working scheme
Energy Source: Electric Power
Reduced Capacity: Generally no more than 300–400 l/day
1 Compressor (Freon); 2 Boiling Chamber; 3 Heat Exchanger; 4 Expansion Valve; 5 Steam Condenser; 6 Ejector; 7 Pump; 8 Distilled Water Tank; 9 Concentrate Pump.

Filtration is the general unitary operation able to remove solid particle from a liquid solid particle. The filtration is applied on solid that normally take long time for sedimentation or for high flow rate.

The sedimentation time depends from the velocity of sedimentation of the particle.

The velocity of sedimentation depends from difference in density of sludge and liquid («Stoke» law). As is possible to understand, if the flow rate is high or if the sludge as very low density the time for sedimentation became huge.

CIE realize his multimedia sand and charcoal filtration with 3 different layers of 99% pure silica. The most important part for the realization of mechanical filtration is to find the correct velocity for the water passing through the filters.

This value is carefully calculated by CIE technicians based on the data of the process and the type of solid to be removed. The fouling and clogging of the filter is monitored with a ΔP. When the pressure difference reaches the set point the back-wash cycle is automatically performed with air and water to have a fluidification of the filter bed.

CIE uses reverse osmosis technology in membrane wastewater treatment plants. This process allows the transfer of molecules from one saline solution to another. As a result, R.O. technology frees the water from unwanted substances.

The phenomenon of osmosis occurs when pure water flows from a dilute saline solution through a membrane into a higher concentrated saline solution.

A semi-permeable membrane is placed between two compartments. “Semi-permeable” means that the membrane is permeable to some species, and not permeable to others. Assume that this membrane is permeable to water, but not to salt. Then, place a salt solution in one compartment and pure water in the other compartment. The membrane will allow water to permeate through it to either side. But salt cannot pass through the membrane.

As a fundamental rule of nature, this system will try to reach equilibrium. That is, it will try to reach the same concentration on both sides of the membrane. The only possible way to reach equilibrium is for water to pass from the pure water compartment to the salt-containing compartment, to dilute the salt solution.

If a force is applied to this column of water, the direction of water flow through the membrane can be reversed. This is the basis of the term reverse osmosis. Note that this reversed flow produces a pure water from the salt solution, since the membrane is not permeable to salt.

RINSEGUARD is a specific unit dedicated to evaluate and feed only the required water to provide suitable rinsing on a Metal Finishing Line.

Use of the CIE RINSEGUARD System with reduce water consumption, and associated costs, up to 30% by avoiding unnecessary high rinse water flow rates

CHEMGUARD automatically measures baths concentration and provides important data such as acidity, alkalinity, pH and more.
It also adjusts the dosing rate of chemicals according to this data, checking and maintaining each bath’s pre-set values.

CHEMGUARD can also measure rinse conductivity, to help save water and insure perfect rinse quality.
The computerized system for Monitoring, controlling and feeding ALUMINUM FINISHING LINES (Chemical bathes and Rinses)

• Directly measuring bath concentrations to provide operational data (acidity, alcalinity, pH, etc.)
• Measuring rinse water conductivity and controlling rinse water flow rate to insure excellent rinse quality
• Automatic checking and maintaining baths values of each bath, driving the feed of chemicals by a modular and reliable proportional band way

To keep rinse waters at salinity level to saving water and provide excellent quality:

• Calculate, record and elaborate all data and alarms, including trends and diagrams, conforming to the requirements of ISO 9000.
• Calculate and record the chemical consumption, per each bath and per each chemical
• File all data/values with the possibility to visualise or export them by CD to other systems (excel, access, etc.)
• Export all data through a common browser on Internet or Ethernet network
• Tele-assistance from long distance through Internet connection

The CIE systems employs a unique regeneration process where HCl and NaOH usage are optimized and the regeneration waste volumes are less than 50% of current technology.

Purification plants with Ion Exchange (I.X.) technology, able to deliver demineralized water with a low salt concentration and conductivity able to produce process quality demineralized water for either rinse water recycling or once through operations.

CIE has patented a special technology called PUR-ALL, which is a chemical-physical process used for specific water treatment plants for fluorides and sulphates removal. The main purpose of this system is infact the abatement of sulphates, fluorides and aluminum, in order to obtain clean water from these elements, and therefore reusable.

PUR-ALL is based on a combined action between a chemical additive (PUR-ALL 03S) and application technology. Thanks to that combination, Sulfates and Fluorides are precipitated as ‘total insoluble complex’ of Al3O3, CaO, CaSO4, CaF2.

PUR-ALL process, allow to leave waste water with extremely low pollution

• Sulphates: ≤ 150 ppm
• Fluorides: ≤2 ppm
• Conductivity: ≤ 400 µS/cm

PUR-ALL find its application on any acidic section containing H2SO4 and HF such as:

• Aluminum Anodizing and Painting
• Stainless Steel Pickling
• Aluminum Cans & Coil

PUR-ALL technology is Barium and Barium salts free
PUR-ALL is also propaedeutic to ZLD (Zero Liquid Discharge) technology