high efficiency ~ simple package ~ proven reliability ChromaPur Chromic Acid Purification Unit
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1 high efficiency ~ simple package ~ proven reliability ChromaPur Chromic Acid Purification Unit Achieve maximum recovery, maximum cost reduction, and maximum quality consistency with Eco-Tec s chromic acid purification system, ChromaPur Chemical Recovery
2 ChromaPur Chromic Acid Purification Unit For over 20 years, chrome platers have looked to Eco-Tec for purification systems to achieve superior cost savings. What is a ChromaPur? The ChromaPur System is a small, skid mounted device that automatically processes chromic acid plating solution from one or more plating tanks. It uses a simple PLC (programmable logic controller) in a control panel with a graphical display of the system s operation. The heart of the ChromaPur System is the Recoflo ion exchange bed, which removes metallic contaminants while allowing purified chromic acid to pass through for reuse. Why use a ChromaPur? In hard chrome plating processes, metal contaminants (Al, Cu, Fe, Cr 3+, etc.) buildup in the plating bath. These lead to a decline in performance as measured by longer plating times, higher voltages, and an increase in plating defects (eg. pitting). Eventually, bath replacement becomes necessary. Fresh chromic acid must be added and the old solution must be purified or hauled off-site for disposal. Considerable savings are possible if the metallic contamination can be removed from the spent solution with continuous purification. Savings fall into several categories: Chromic acid purchases are greatly reduced; Waste treatment costs are minimized and bath disposal is eliminated; Plating performance is improved, reducing rework; Solution conductivity is improved, reducing electrical requirements and ensuring uniform plating thickness. How Does the ChromaPur Work? A contaminated batch of chrome solution is transferred to a feed storage tank. On demand, chrome plating solution flows by gravity to the ChromaPur reservoir for processing. A pump mounted on the ChromaPur frame pumps the chrome through dual stage cartridge filters and into the resin bed, and metal contaminants are removed from the solution. Purified chromic acid flows to a Purified Storage Tank. When a preset volume of feed has been treated, the automatic regeneration begins. Regeneration uses sulfuric acid (93-96% w/w H2SO4) metered from a standard acid drum. It is diluted automatically to the correct strength before being pumped through the resin bed. ChromaPur Process Flow RINSE 1 RINSE 1 RINSE 1 FEED TANK CHROMAPUR PRODUCT TANK
3 Cost Savings It is easy to work out the savings you can expect with the installation of a ChromaPur System. Savings will vary depending on a number of factors such as hours of operation, chemical costs and disposal methods. These charts compare the cost of dumping and chemical neutralization with the costs of recovery with ChromaPur. Bath Dumping ChromaPur Installed 32% 38% 30% 9% 4% 87% Chrome Losses Treatment Chemicals Sludge Disposal Cost Savings Treatment Chemicals Sludge Disposal Basis: Chemical treatment with sodium metabisulfite and caustic soda Removal of waste material as filter cake Chromic acid = 255 g/l; Metals = 15 g/l at time of dump Chromic acid = 240g/L; Metals = 5g/L with the ChromaPur System Note: The ChromaPur System also makes it easier to achieve consistent finishes, so you may wish to factor in an allowance for reduction in rework. Installation and Use Prior to shipment of the equipment, detailed operating manuals will be mailed out. These manuals include easy to understand installation instructions. The instructions offer helpful details on locating the system, piping and wiring. Installation of a ChromaPur System is simple and straightforward. After installation is complete, the System can be started. A reference manual includes checklists and troubleshooting guides. No special adjustments are required as ChromaPur is fully tested and calibrated prior to shipment. Routine monitoring is recommended and log-sheets are provided for this purpose. Preventative maintenance schedules are also included in the manual. Regular maintenance requirements include the replacement of the filter cartridges. The System is supplied with a replacement parts kit that includes enough filters and resin to last a typical plant for about one year. ChromaPur Systems also include access to 24/7 customer service. Onsite training and assistance are available, and a full stock of replacement parts can normally be shipped within twenty-four hours.
4 Selecting ChromaPur Components It is simple to select the right ChromaPur for your needs. 1. Determine the metal buildup rate using the guide below. 2. Select a ChromaPur unit from the performance specifications chart on the following page. Choose a unit that provides enough metal removal capacity to offset the buildup rate. 3. Note that the ChromaPur capacity depends on the metal contaminant level that is to be maintained in the bath - either 5 g/l or 15 g/l contaminant levels. 4. Select a Feed Acid Storage Tank and a Product Acid Storage Tank from the tank specifications chart on page 8. Determination of Metal Buildup Rate To calculate the removal rate, you will need to analyze your bath for metal contamination concentration at two different points in time. The resulting metal buildup rate number is then used to determine the required system size. Numbers to the right are used as an example. Example: a) First sample - metal concentration (g/l) 7.5 b) Second sample - metal concentration (g/l) 15 c) Operating time between samples (hours) 115 d) Bath volume (litres) 3785 e) Metal buildup rate (g/hr) (b) 15 - (a) 7.5 (c) 115 x (d) 3785 = 250 Notes: For the example case, a CP8 can remove 250 g/hr while maintaining 5 g/l of metals in the bath. A longer time period between samples will result in better accuracy. Wait at least two weeks before taking the second sample. Ensure that production levels during the sample period are typical of normal operation. Consider repeating the sampling exercise and check to see that results from the two periods are comparable. Avoid dumping, decanting, or altering the bath chemistry during the sampling period. Trivalent chrome plating solutions and those containing strontium based catalysts are not compatible with ChromaPur.
5 Performance Specifications Typical Unit Capabilities Model Number Metallic Removal (grams per hour) Typical Stream compositions with ChromaPur (Models CP6, CP8 and CP10) Other requirements for ChromaPur (Models CP6, CP8 and CP10) Flowrates (liters per hour) Low Setting (5 g/l) High Setting (15 g/l) Feed Product Waste CP /20 75/35 85/125 CP /40 160/65 145/220 CP /65 215/ /340 ChromaPur Stream Chromic Acid (typical range) Composition (grams per liter) Sulfuric Acid Dissolved Metals Low Setting High Setting Feed Recovered Acid Waste <1 < Model Number Flowrates (liters per hour) ChromaPur Water Sulfuric Acid Evaporation Needed CP6 115/ /2.5 30/15 CP8 200/ /4.0 55/25 CP10 315/ /6.0 85/40 Notes: Certain chrome plating baths are not compatible with ChromaPur. Included are those containing strontium based catalysts, and trivalent chrome plating solutions. For flowrate columns, be aware that numbers on the left refer to the low setting condition while numbers on the right refer to the high setting condition.
6 ChromaPur Specifications The Eco-Tec ChromaPur Unit includes: dual stage cartridge filter, diaphragm feed pump and sulfuric metering pump level control modules for Purified Acid Storage Tank and Regenerant acid drum skid-mounted design with all piping and valves on a steel frame 24V control panel with graphics operating & maintenance manuals (3) spare parts kit Dimensions cm / inches Electricity Comp. Air (peak) Water (peak) Model Number bar (80 bar (30 psig) Length Width Height 110/1/60 m 3 /hr (SCFM) m 3 /hr (GPM) CP6 127/50 81/32 5 amps 1.5 (<1) 0.22 (0.6) CP8 175/69 5 amps 1.5 (<1) 0.41 (1.8) 157/62 96/38 CP10 5 amps 3.3 (<1) 0.64 (2.8) Notes: The temperature of the chromic acid added to the Feed Acid Storage Tank should be less than 55 C (131 F). This ensures that the chromic acid fed to the ChromaPur System is less than 32 C (90 F). See manual for further details. No provision has been made for the removal of oil, grease or submicron particles from the chromic acid or the water fed to the ChromaPur System. Air must be clean, dry, oil free and filtered to 40 microns. Air filters can be supplied, if required, at additional cost. Water should contain less than 200 mg/l Total Dissolved Solids (as CaCO3) and must be clean (i.e. municipal source filtered to one micron). Sulfuric acid should be 93%-96% w/w technical grade and free of inhibitors and oxidants. See manual for details.
7 Tank Specifications Eco-Tec Feed Acid Storage Tanks include: Rotationally molded seamless polyethylene construction Open top design (to promote cooling) with gusseted flange connection Eco-Tec Purified Acid Storage Tanks include: Rotationally molded seamless polyethylene construction Closed top design with all connections through top Product Transfer pump is an oil-free air diaphragm design with PE body, PFTE diaphragm, CPVC inlet and outlet valves, manual air valve and regulator supplied Feed Acid Storage Tank Purified Acid Storage Tank System Number Feed Acid Storage Tank Dimensions (cm/inches) Product Acid Storage Tank Dimensions (cm/inches) Diameter Height Diameter Height CP6 122/48 213/84 163/64 132/52 CP8 175/69 213/84 183/72 173/68 CP10 175/69 213/84 185/73 251/99 Notes: No level control modules are provided for the Feed Acid Storage Tank. Ensure that provisions are made to prevent accidental overflow during fill-up.
8 high efficiency ~ simple package ~ proven reliability Features Benefits Impacts Short bed height and small resin volume Small equipment size with easy maintenance Low operating costs Counter-current regeneration Simple, effective performance MInimal chrome losses: optimum purification Pre-assembled, skid mounted Easy installation Simple startup and operation Fully automated with full factory pre-testing Fast installation, consistent operation Minimal installation and setup costs ChromaPur Partial User s List Customer Kawasaki Steel Corp. Location Tokyo, JAPAN Precise Hard Chrome Texas, USA Jan-Eze Plating Inc. Arkansas, USA Teikoku Piston Ring Anqing, CHINA Astro Electroplating Wisconsin, USA Quinn s Oilfield Supply Alberta, CANADA Industrial Hard Chrome Illinois, USA For a Fast Quote - ChromaPur@eco-tec.com Eco-Tec Inc Squires Beach Rd., Pickering, Ontario Canada L1W 3T9 Tel: (905) Fax: (905) ecotec@eco-tec.com Eco-Tec (Europe) Ltd. Unit 29C Ring Road, Zone 3, Burntwood Business Park Burntwood, Staffordshire, England WS7 3JG Tel: (44) Fax : (44) ete@eco-tec.com All statements, information and recommendations contained herein are, to our knowledge, true and accurate. However, no guarantee or warranty is given, expressed or implicated. Nor shall any statement, information or recommendation constitute a representation unless set forth in an agreement signed by Eco-Tec. ChromaPur is a trademark of Eco-Tec Inc.. All rights reserved.
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