Demineralizer Regeneration Frequency Determination

Routinely, I am asked how long will one of our cation-anion two bed demineralizers operate before it has to regenerate. To determine this, we need to know the flow rate and the inlet water quality.  The flow is generally known, but the water quality generally is not early in a water treatment project.  The easiest way is to use conductivity as a rough approximation of water quality for budget purposes only.  Before a system is purchased, a complete water analysis is required to verify with one of the ion exchange resin sizing programs to purchase the correctly sized demineralizer.

Here are a series of graphs I sent to the prospect to help get a budget determined.  The graphs include run times for a DT36072, DT54072 and a DT60072 dual bed demineralizers from Res-Kem. 

For Additional Information:
Ten Questions to Properly Size a Water Treatment System Including a Deionizer/Demineralizer
Equipment Bulletin for a Res-Kem DT36072 Cation-Anion Demineralizer
Equipment Bulletin for a Res-Kem DT54072 Cation-Anion Demineralizer
Equipment Bulletin for a Res-Kem DT60072 Cation-Anion Demineralizer
Need Technical Help sizing a unit?

Temporary Exchange Softeners for Unplanned Equipment Repairs

Temporary, skid mounted softeners can get you back up and running when unplanned repairs are required to your in-house zeolite softeners.   Depending on the extent of the problems, repairs can take several weeks or longer.  Tanks are simply hooked up to your water source via cam-lock connections and 2" industrial Goodall hose.  As the tanks exhaust, Res-Kem will bring new tanks with regenerated resin.  No backwash is required, no salt is required and no hard piping is required.  

Skid-mounted Exchange Water Softener form Res-Kem

In order for water tube or firetube boilers to operate efficiently they need low hardness quality feedwater. If you've recently had a boiler opening and discovered scaled boilertubes due to non-functioning boiler pretreatment zeolite softeners and ineffective boiler internal chemical treatment. Res-Kem can provide ASME code 100 psig temporary skid mounted softeners good for flow ranges- 15-120 gpm. These tanks can be provided within a 150 miles radius of our locations in near Philadelphia, PA, New Britain, CT, Avon, MA and Colonial Heights, VA.

The tanks are delivered via a Res-Kem truck with a liftgate for dock deliveries or ground deliveries.  We transport the tanks short distances within your plant to the point of use via a motorized pallet jack.

 

Failing Water Softener.  Look familiar?

Growing DI Exchange Business Means Additional DI Tanks Needed

As the number of customers continues to increase for our deionized water exchange service, Res-Kem General Water continues to heavily invest in new DI (deionization) tanks and mixed bed ion exchange resin.  We just received our first of three shipments of our all stainless steel DI12 and DI30 tanks.  Res-Kem continues to have the largest fleet of stainless steel deionization exchange tanks on the East Coast.  

All Stainless Steel Service DI Tanks Received at Res-Kem for Growing DI Exchange Business

These exchange tanks and resin are used to produce high purity to ultrapure water for many industries including power, cogeneration, beverages, electronics, semiconductors, universities, corporate research campuses, pharmaceuticals, and manufacturers of most any type where high purity water is used in the product or touches the product.

Locations Served:
Res-Kem will use these primarily for customers in our southern region which includes New York, New Jersey, Pennsylvania, Delaware, Maryland, DC, Virginia and North Carolina out of our Aston, PA and Colonial Heights, VA locations.

Also, we have a large fleet of DI tanks serving our northern region New York, Connecticut, Massachusetts, Rhode Island, New Hampshire, Vermont, and Maine out of our New Britain, CT and Avon, MA locations.

For More Information:On Res-Kem General Water's DI Exchange Service
Technical and/or sales questions

DI System Shipping to Washington Chemical Plant

Shipping today is a two bed (cation ion exchange tank followed by an anion ion exchange tank) demineralizer for a chemical plant in Washington State. This unit is a DI60072 and will be used in parallel with several other older systems currently installed at the same plant to increase treated water capacity.

150 gpm Demineralizer Showing NEMA 4X Control Panel with Panel View 300 HMI

The system will use the existing bulk acid and caustic for regeneration of the cation resin and anion resin respectively.

150 gpm Demineralizer Compact Design of Piping

System Design:

Normal Service Flow Rate:	150 gpm
Maximum Service Flow Rate:	230 gpm
Vessel Size:	60" x 72" Diameter x Straight side
Volume of Cation (SAC) Resin	66 cu ft
Volume of Anion (Type 1) Resin	77 cuft
Cation Vessel Internals:	Header Lateral Design PVC Schedule 80
Anion Vessel Internals:	Header Lateral Design 316L SS Schedule 10
Automatic Valves:	Butterfly valves 316L SS disc with Air to Open Spring to Close Actuators
Controls:	Allen Bradley Micrologix PLC Panelview 300 HMI NEMA 4X FRP panel
Instrumentation:	Signet Flow meter Totalizer Thornton Conductivity Meter

Additional Information:
For our complete demineralizer/deionizer product line.
For help sizing a DI system, please contact us.

New Two Bed Demineralizer Technical Bulletins

Res-Kem has a complete 2-Bed demineralizer product line designed for industrial water production.  The standard tank sizes range from 18" to 96". 

Two-Bed Demineralizer with
PVC Tank Coating and PVC Face Piping

These two-bed deionizers are designed for fully or semi-automatic production of water with a conductivity of less than 10 micro-ohms and feature:  

• Flow rates from 10 - 220 gpm and capacities from 140,000 - 2,200,000 grains.
• Strong acid 8% crosslinked cation and type 2 strong base anion resins as the standard, with other resins available as an option.
• Microprocessor based control system with conductivity monitor and flow sensor for regeneration initiation.
• Electrical enclosures are NEMA 4XFG corrosion resistant fiberglass, which reduces maintenance costs.
• PVC coated steel vessels depending on size and customer requirements.
• Optional ASME code vessels.
• Factory assembled and skid mounted for quick installation and minimum startup cost.
• Schedule 80 PVC piping package including air operated true union ball valves are standard. Air or electric actuated ball or butterfly valves are available as an option.
• Pressure regulators, rotameters and metering valves supplied for accurate and safe control of regeneration water and chemical introduction.
• Internal distributors are corrosion resistant, designed for optimum efficiency and are fully supported where required.

Technical Bulletins:
The following are the standard system sizes available from Res-Kem:

DI18072	Dual 18-inch diameter demineralizer system
DI24072	Dual 24-inch diameter system
DI30072	Dual 30-inch diameter system
DI36072	Dual 36-inch diameter system
DI42072	Dual 42-inch diameter system
DI48072	Dual 48-inch diameter system
DI54072	Dual 54-inch diameter system
DI60072	Dual 60-inch diameter system
DI66072	Dual 66-inch diameter system
DI72072	Dual 72-inch diameter system
DI78072	Dual 78-inch diameter system
DI84072	Dual 84-inch diameter system
DI90072	Dual 90-inch diameter system
DI96072	Dual 96-inch diameter system

For further information, please contact Res-Kem or call 800-323-1983.

Automatic DI Bank Switching and Data Acquisition Controller

Res-Kem has developed an integrated DI Bank Switching and Data Acquisition Automation Controller. The system monitors the inlet and outlet resistivity and the flow rate. At one of several alarm points, the system will send a text message to any number of email addresses and mobile devices. As part of a service agreement with Res-Kem/General Water, the system will warn Res-Kem/General Water personnel to prepare for a replacement of the soon to be exhausted bank of DI bottles.

Depending upon the system programming the bank will attempt to rinse to quality in several stages. If it does not succeed, the bank will switch to a standby bank and notify Res-Kem that the bank is exhausted fully and needs to be changed out.

The reason why Res-Kem developed this product is many people were having problems getting replacement parts and proprietary circuit boards for the excellent product called the Aquaswitch II a registered trademark of Myron L. Also, with reduced staffing at most of our customers, people do not have the time to monitor a stack light or resistivity monitor. As a result, the quality can be poorer than required potentially damaging down stream processes and products.

Deionizer/Demineralizer System with Packaged Design Introduced

Res-Kem recently introduced packaged DI Water Systems for Commercial and Light Industrial applications. The OHM-TECH Series two-bed deionizers for commercial and light industrial applications are designed for semi-automatic production of water with a conductivity of less than 10 micro-ohms and feature:

• Flow rates from 1 - 40 gpm
• Ion exchange Capacities from 9,000 - 90,000 grains.
• Strong acid cation and type 1 strong base anion resins.
• Microprocessor based control system with conductivity monitor and flow sensor for regeneration initiation.
• Corrosion resistant fiberglass electrical enclosures which reduces maintenance costs.
• Resin vessels are polyethylene-lined fiberglass.
• ASME code vessels.
• Factory assembly and skid mounting for quick installation and minimum startup cost.
• Schedule 80 PVC piping package using a multi-function hydraulically operated composite valve.
• Metering valves for accurate and safe control of regeneration water and chemical introduction.
• Internal distributors are corrosion resistant, designed for optimum efficiency.

These following facilities are examples of ideal applications for Res-Kem's demineralizer and deionizer (DI) equipment:

• Food and Beverage Processing Plants
• Power plants
• Chemical plants
• Pharmaceutical Plants
• High pressure boiler feedwater
• Manufacturing Plants
• Laboratories
• Autoclaves
• Steam Generators
• Electronic Products
• Medical Device Production
• Alloy Metal Fabrication
• Aerospace
• Humidification Systems
• Metal Treating
• Plating
• Printed Circuit Boards