process innovations, inc.
equipment for the process industries
     
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Representing FLSmidth Krebs in Upstate New York:

For spare parts or service outside of New York State, please go to the FLSmidth Krebs web site or call them at 520-744-8200.

 

FL Smidth Krebs is the world’s leader in hydrocyclone separation solutions. Serving the process industries since 1952, Krebs Engineers is recognized around the world for its knowledge and expertise in the use of hydrocyclones for the recovery and classification of solids, removal of oil from water and severe-duty slurry pumping. Krebs Engineers works with an unrelenting focus on customer satisfaction and technical excellence. The result is a reputation for innovative engineering, quality products and unmatched service!
Shown, left, are two views of Krebs' Hydrocyclones for recycling and reuse of water, wastewater and particle separation from liquids. Please read, below, for more information on how these cyclones work in your industry.

Krebs Engineering has long been involved in separation technology through the engineering and sales of their hydrocyclones. With the increased interest in preserving natural resources, these units have become popular in the process industries. The following will provide some insight into applications that Krebs has been involved with over the years. We’re quite sure that you will be able to find use for these units in one or more areas around your plant for solids separation or liquid—liquid separation. Here are some real life applications in their respective fields:

 

INDUSTRIAL/MUNICIPAL WASTEWATER TREATMENT

Krebs’ hydrocyclones are a valuable tool in both municipal and industrial waste treatment facilities for several reasons. The primary functions for use of a hydrocyclone in wastewater treatment are to increase efficiency by cutting down on wear of more expensive downstream equipment, to remove oversized particles to cut down on plugging issues, to remove solids from process streams to minimize scaling, to remove abrasive materials to reduce costly equipment maintenance, to increase capacity on downstream equipment, and to concen trate slurries to increase a plant’s efficiency in solids separation. Listed in the following are other more specific uses for this technology: To remove sand loading to cut down on pump and valve erosion problems and also to decrease the size and output of settling ponds To clean industrial plant effluent for reuse in plant operations to comply with government regulations on the amount of solids allowed to be discharged into wastewater facilities For use in cooling tower applications to remove airborne dust and grit that collects in the cooling tower, as well as solids that accumulate in piping and heat exchangers In steel mills, hydrocyclones can remove mill scale solids from the plant cooling water, virtually eliminating the need to clean solids out of the cooling water pits. The underflow discharge reports to a separate pit where the water overflows and is recycled back to the feed. To provide a simple, economical, yet highly efficient means of continuously removing dirt, grit, and other abrasive solids from injection liquid for mechanical pump seals To both remove particulate in scrubbing systems in order to recycle effluent but also to prevent spray nozzles from clogging In converting salt water to fresh water, hydrocyclones remove sand from seawater or brackish well water ahead of expenseive membranes used in the reverse osmosis units Used in printed circuit board production, hydrocyclones recover photoresist, copper particulates and fine pumice from rinse water in glass or metal polishing operations With higher drag forces on the particulates, solids can be removed from fiberous materials such as in the fiberglass industry where glass shot is removed from the process stream before filtration

PULP & PAPER

There are two basic functions of a hydrocyclone in pulp plants: to continuously remove fine sands from paper pulp, typically in multiple stages, or to intermittently clean the larger reject material and discharge it intermittently to minimize fiber loss. In both kraft pulping facilities and recycled fiber mills, contaminants can easily be separated from the usable pulp prior to other screening equipment, greatly increasing the wear life of the screen baskets and other equipment. FOOD In the food industry, many applications have surfaced over the years and we’ll touch on the more popular of these applications here. If you have a specific food application that you would like us to examine, please call us as Krebs may very well be the answer. In the food industry, hydrocyclones are widely used to : Remove sand from vegetable wash water Remove grit, tramp metal, and other debris from wine, juices, and purees -- ahead of equipment such as homogenizers, food mills and centrifuges Remove grit from wastewater taking the loading off wastewater treatment facilities Remove starch from wastewater to reduce the BOD demand at waste water treatment facilities Removing sand and shells from cooked seaweed Removing crumbs from cooking oil More specifically, in cheese processing, Krebs has used their hygenic de-sanders in place of other costly, high maintenance equipment to recover cheese fines from whey in dairy process water and also in recovering fat from the processing of both mozzarella and ricotta fines.

POWER PLANTS

In using calcium carbonate in wet flue gas desulfurization systems, cyclones can be effective in many process steps. First, a cyclone can be used to classify and redirect oversized particles of calcium carbonate back to the ball mill for further grinding. Second, during the formation of gypsum, cyclones dewater and thicken the slurry prior to sending to a dewatering belt. In applications where chlorides might come into play, hydrocyclones can be manufactured of FRP with replaceable gum rubber liners for abrasion resistance. Hydrocyclone apexes can be manually adjustable gum rubber liners or fixed silicon carbide ceramic inserts. Radial manifold assemblies for the hydrocyclones are fabricated from carbon steel and have spark tested, vulcanized gum rubber and/or chlorobutyl lining. Exposed carbon steel surfaces are epoxy painted for corrosion resistance.

METAL SLURRY PUMPS

The primary applications for the Krebs Metal Slurry Pumps are mill discharge, crusher slurry, sand and aggregate or any coarse solids or other severe, abrasive slurries, especially useful in copper, gold, lead-zinc, coal or phosphate plants. The most dramatic savings will be in these applications although savings will also be substantial on fine solids such as iron ore or kaolin. With the advantages of 10-30% lower power consumption than other slurry pumps, long even wear life and less pump downtime, the savings is clear.

COMPLETE SYSTEMS

Although the hydrocyclone can work well alone, Krebs specializes in complete systems approaches to water and wastewater applications as well as oil and water separation problems. With many configurations such as manifold systems and spider manifolds, we are confident that we can assist you in finding a stand alone unit or entire systems approach to your wastewater issues.

 

 

Featured, left, is a complete solids removal system for particulate from a wastewater stream. Krebs has over fifty years of experience in cyclonic separation. Please call us or visit our information request page for additional information.