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Deionization

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Gaco Water Deionization System

A 6 stage water deionization system manufactured by Gaco and capable of delivering 70 cubic meters (15,000 imperial gallons) of treated water per hour. The system was started up in 1987 and operated continuously for 9 years, with the exception of yearly plant maintenance shutdowns, until August of 1996.

The system consists of the following treatment stages and equipment :

1) Activated Carbon Adsorber - for the removal of chlorine from the raw water 7 foot diam X 10 feet tall tank, epoxy lined, designed to 689 KPA (ASME Code) complete with all valving, controls and stainless steel piping.

2) Organic Trap - for the removal of organic matter from the raw water 5 1/2 foot diam X 6 feet tall tank, 5mm thick rubber lined, designed to 689 KPA (ASME Code) complete with all valving, controls and stainless steel piping.

3) Strong Acid Cation Exchanger - for the removal of dissolved mineral compounds 6 foot diam X 10 feet tall, 5mm thick rubber lined tank, designed to 689 KPA (ASME Code) complete with all valving, controls and stainless steel piping.

4) Forced Draft Decarbonator Column - carbon for the removal of dioxide gas produced by reactions in the cation exchanger, 4 foot diam X 12 feet tall, F.R.P. construction complete with all valving, controls, blower and stainless steel piping. This column is mounted on top of the Clearwell.

5) Clearwell - a reservoir below the Decarbonator Column to provide retention time in the process stream. 7 foot diam X 6 feet tall, F.R.P. construction complete with all valving, controls and instrumentation.

6) Transfer Pumps - 280 G.P.H. at 50 P.S.I.G. 316 Stainless Steel

7) Strong Base Anion Exchanger - for the removal of dissolved elements, 5 1/2 foot diam X 6 feet tall, 5mm thick rubber lined tank, designed to 689 KPA (ASME Code) complete with all valving, controls and stainless steel piping.

8) Mixed Bed Exchangers - for the polishing treatment of the demineralized water, 2 - 4 1/2 foot diam X 9 feet tall, 5mm thick rubber lined tanks, designed to 689 KPA (ASME Code) complete with all valving, controls and stainless steel piping. Only one of these exchangers is required to operate in the process stream while the other is being regenerated.

9) Mixed Bed Cartridge Filters - 10 micron filters, filter vessels constructed of 316 SS.

10) Polished Water Surge Tank - 5 diam X 5 high polyethylene construction, 3400 liter capacity, complete with level controls.

11) Polished Water Transfer Pumps - 162 G.P.H. at 90 P.S.I.G. 316 Stainless Steel

12) Polished Water Cartridge Filters - 5 micron filters, filter vessels are constructed of 316 SS. Each unit is complete with a steam heat exchanger and all valves, controls and instrumentation.

13) Neutralization Tank Accessories - pumps 265 G.P.H. at 10 P.S.I.G. and other controls, valves and instrumentation needed for a process waste neutralization tank.

14) D.I. Water Storage Tank Accessories - pumps 440 G.P.H. at 60 P.S.I.G. and other controls, valves and instrumentation needed for a deionized water storage tank.

15) Brine Solution Batch Tank - polyethylene tank and all controls, valves, pump, piping and instrumentation for a brine solution batch preparation unit.

16) Sulfuric Acid Batch Tank - polyethylene tank and all controls, valves, pump, piping and instrumentation for a sulfuric acid solution batch preparation unit.

17) Caustic Soda Batch Tank - polyethylene tank and all controls, valves, pump, piping and instrumentation for a caustic soda solution batch preparation unit.

18) Process Control and Instrumentation Console - control and instrumentation panel for the above process system.

19) Process Piping - the stainless steel piping interconnecting the above process steps is also available.

Each of the above units is mounted on a steel skid with piping, valves, wiring, on each skid kept intact. Connections between process steps and wiring to control console have been cut, as have external input lines such as compressed air, steam, and condensate lines. Original piping and control drawings for the above system are available. The process resins and activated carbon material have been retained in place in the tanks and are reusable.


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