|
 Industrial Wastewater
Krebs Cyclones in industrial water treatment have several forms. They are usually D-series Cyclones (with or without grit pots) or large KS or KD DeSanders. The selection of the hydrocyclone depends upon the particle size, flow rate and percent solids loading. Liners can be elastomeric, hardened steel or ceramic. Liner choice is based on the abrasiveness of the particles, temperature and pH.
GENERAL APPLICATIONS:
 |
Increase plant efficiency, cut equipment wear. |
|
Remove oversized particles to reduce pluggage. |
|
Remove solids from process streams to minimize scaling. |
|
Remove abrasive material to reduce costly operator maintenance. |
|
Reduce solids loading to increase the capacity and performance of downstream equipment. |
|
Concentrate slurries to increase capacity and performance of downstream equipment. |
SPECIFIC APPLICATIONS:
Remove Sand from Plant Intake Water
Industrial plants using water from rivers with heavy sand loading experience serious pump and valve erosion problems if they don’t take steps to remove the sand from the water. Settling ponds are one solution but they require a lot of space and must be regularly dredged. Hydrocyclones for sand removal, on the other hand, take up little space and the sand separator discharge can be put into a much smaller settling pond.
Clean up Plant Effluent
Hydrocyclones are used to clean industrial plant effluent for reuse in plant operations. Government agencies have also established a minimum amount of solids an industrial plant can discharge into wastewater facilities. Hydrocyclones can be used to remove a good deal of the settleable solids in order to meet these requirements.
Remove Solids from Cooling Tower Water
Hydrocyclones are used in cooling tower applications to remove airborne dust and grit that collects in the cooling tower, as well as solids that accumulate in the piping and heat exchanger. Removing solids ahead of the heat exchanger is especially critical because the tubes are difficult to clean.
Remove Solids from Steel Plant Quench Water
Steel mills use hydrocyclones to remove mill scale solids from the plant cooling water. The system virtually eliminates 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. Steel mills, in general, can use up to 33" diameter hydrocyclones and typically handle up to 5,000 gpm. Krebs Cyclones are provided with replaceable abrasion resistant ceramic liners for long wear life. The liners are field replaceable with hand tools.
Remove Solids Ahead of Pump Seals
Krebs Cyclones provide a simple, economical, yet highly efficient means of continuously removing dirt, grit, and other abrasive solids from injection liquid for mechanical pump seals. As shown in the drawing, a small amount of the pump feed is piped into the separator. The degritted liquid is piped from the overflow to the pump seal and the solids are returned to the pump section from the bottom of the separator.
Scrubber Applications
Krebs Cyclones are used on scrubbers to remove solids from the scrubber effluent. The degritted hydrocyclone overflow can then be reused as make-up liquid in the scrubber. Solids must be removed to prevent clogging because spray nozzles are used in the scrubbing process.
Salt Water Conversion
Hydrocyclones are used in systems designed to convert salt water to fresh water. They remove sand from seawater or brackish well water ahead of reverse osmosis units. This extends the life of the expensive membranes used in the reverse osmosis units.
Electronics Manufacturing
Hydrocyclones are used in printed circuit board production to recover photoresist from stripping solutions, to recover copper particulates from solutions and to recover fine pumice from rinse water in glass or metal polishing operations.
Remove Glass Shot from Fiberglass Slurry streams
Hydrocyclones can be used to remove solids from fiberous materials because of the higher drag forces on the particulates. This physical property is put to use in the fiberglass industry where hydrocyclones are used in series and parallel applications to remove glass shot from the process stream before being filtered.
|