Key Benefits

  • Efficient, versatile separation of very fine solids
  • Low capital cost, small footprint
  • Easy operation, easy maintenance

Simply effective: industrial desander vessels for fine separation

In a market where numerous industries require separation of fine solids from liquid matter and each situation is unique, we know your solution needs to be thorough and complete. At FLSmidth, we keep a solid (and fluid) focus on hydrocyclone applications throughout all phases of separation.

In a market where numerous industries require separation of fine solids from liquid matter and each situation is unique, we know your solution needs to be thorough and complete. We keep a solid (and fluid) focus on hydrocyclone applications throughout all phases of separation.

 

KREBS® CP Vessels, in a nutshell, are simply pressurized containers that hold from a few up to hundreds of small, high-capacity cyclones. As a system, the vessel uniformly distributes the feed with one feed inlet, and collects the overflow and underflow with one outlet for each. The hydrocyclones are closely packed inside a three-chamber vessel, with stainless steel plates separating the overflow and underflow from the feed chamber.

 

 

It all boils down to separation

Our customers always ask about separation. And we tell them our CP Vessels can make separations as fine as 5 microns, depending on their slurry characteristics. 

 

Typically, we talk in terms of D98, or the point where 98% of solids at a certain size are removed. For example, at an inlet concentration of 1% solids with sand and water, our 50mm (2-in) gMAX Cyclone will remove 98% of 2.65-specific-gravity solids that are 12 microns and larger.

 

 

Sample separation capabilities

 

Krebs Model gMAX1 (0.28" Vortex Finder)

Solid Specific Gravity

At 30 psi pressure drop

D50 (Microns) 

D98 (Microns)

 1.4  7 15 
 2.65  3.5 7.5
3.5   3 6
7.5   2 4

For liquid with viscosity of 1 cP and specific gravity of 1.0.
0.5 wt% feed solids, solid specific gravity as shown in above table, for spherical solid particles.

 

Krebs Model gMAX2 (0.8" Vortex Finder)
 Solid Specific Gravity  At 30 psi pressure drop
 D50 (Microns)  D98 (Microns)
 1.4  13  29
 2.65  6.5  14
 3.5  5  11.5
 7.5  3  7
 

For liquid with viscosity of 1 cP and specific gravity of 1.0.

0.5 wt% feed solids, solid specific gravity as shown in above table, for spherical solid particles.

 

Krebs Model gMAX3 (1.2" Vortex Finder)
 Solid Specific Gravity

At 30 psi pressure drop

 D50 (Microns) D98 (Microns) 
1.4   16 35.5
 2.65  8 17.5
3.5  6.5 14
7.5  4 9

For liquid with viscosity of 1 cP and specific gravity of 1.0.
0.5 wt% feed solids, solid specific gravity as shown in above table, for spherical solid particles.

Krebs close packed cyclone vessel inside view of cyclones
KREBS® gMAX® Cyclone cartridge in Close-Packed Vessel for quick and safe lift from when maintenance or cleaning is needed.

Specified to your unique application

We establish vessel size based on your application’s total flow rate. We then determine proper hydrocyclone size by the separation you require for your application. With this information, we help you choose the exact vessel size and geometry, and the correct number of properly sized cyclones, based on the specific gravity of your solid and liquid materials, the viscosity, and the desired particle size to be recovered

Desander vessels are even more efficient when incorporated with our high-capacity gMAX cyclone technology. The advanced gMAX hydrocyclone requires fewer cyclones for optimal performance, and will produce finer and sharper separations.

Krebs CP close packed cyclone vessel desander
KREBS® CP Vessel on the right is shown with a glass shell to view our gMAX® Cyclones. Glass vessel is for illustration purposes only.

Versatile for a number of industries

CP Vessels are ideal for the removal of fine solids in the automotive, chemical, power and petroleum industries, as well as in food, steel, mining and machining. Our CP vessels are extremely efficient and have a wide range of applications for oil refinery and petrochemical processes. Applications are categorised into three separation types.

 

Removal of solids from water:

  • Waste water grit removal and clean-up
  • Coke fines removal from cutting water and calciners
  • Intake water and fire suppression water systems
  • Solids and oil removal from desalter system

 

Removal of solids from hydrocarbon streams

  • Catalyst removal
  • Wash solids from tank residues
  • Refinery amine system to separate solids, metals and coke fines
  • Hydrocracker and fluid unit feed to separate coke fines from HGO/LGO product streams
  • Removing organic from electrolyte and raffinate in SX applications

 

Removal of oil and hydrocarbons from water

  • Waste water clean-up
  • Hydrocarbon recovery
  • Oil removal from desalter brine
  • Coke blowdown/sour water treatment
  • Treat feed to sour water stripper
  • Removing oil from wash-down and runoff water

 

In the automotive paint industry, our CP Vessels efficiently and effectively remove very fine solids from the paint, including weld balls and car sealant, resulting in a much better paint job. Prior to the advent of cyclones, automobile manufacturers and body shops used bag filters, which would blind over, allowing such solids to pass through and affect the paint job quality. 

High-capacity desander vessels in a small footprint

Efficient, versatile separation of very fine solids

Small-diameter cyclones maximize our unit’s separation abilities to efficiently remove very fine solids. The advantage we provide is a finer cut point than other cyclones can achieve. The features that back up these advantages include a redesigned inlet that separates solids as they enter our hydrocyclone, and a patented double cone angle, which keeps fine solids in high velocity areas, preventing them from exiting the cyclone overflow. 

Low capital cost, small footprint

CP Vessels are extremely compact, as compared to an external manifold system configuration. This reduces your capital outlay and installation headaches.

Easy operation, easy maintenance

The system is simple to operate, as it has no moving parts. By combining our world-class gMAX separation technology with an optimal maintenance design, we have created a system that is easy, fast and safe for removal, replacement and cleaning the vessel.

The power of many cyclones in one simple vessel

KREBS CP Vessels comprise a system of compact, high-capacity, centrifugal separator cyclones, designed to efficiently separate fine solid particles from liquid.

The vessel accommodates many individual hydrocyclones, each uniformly fed using one common feed nozzle, providing consistent operation of all units. The system includes a single feed inlet, and single overflow and underflow outlets.


Cyclones used within the CP Vessels range in size from 13 mm to 76 mm (0.5-in to 3-in in diameter, depending upon your application.


Using computer simulation, we are able to accurately predict your desander vessel’s performance, ensuring the ideal system for your application and eliminating the need for onsite testing. Our use of cyclone “blanks” allows for operational flexibility, where flow rates may change from the original design conditions.

KREBS close packed vessel cyclones
Custom gMAX® Cyclone (CP) Close-Packed Vessel used in an industrial plant water treatment application.

We construct CP Vessels of carbon steel and stainless steel as standard. We also build vessels to withstand high temperatures and pressures, and be certified per ASME requirements or specific customer specifications.

 

CP Vessels have are easy to install and maintain, due to flanged connections and a removable cover for inspection and/or maintenance. We can supply isolation valves at the inlet, if desired, to allow isolation of the vessel for internal inspection. An automatic valve controls discharge of the underflow steam, to purge solids as required.

 

As an option, CP Vessels can be built with an open underflow. This design allows for easy visual inspection and includes a sloped underflow launder directly attached to the vessel to allow discharge of solids.

 

Our CP Vessels have a mounting lug design attached to the vessel shell and the design also provides legs. The support saddles are only supplied on the W model Desanders.

Basic features:

  • Carbon steel or stainless steel construction is standard
  • Variety of construction materials available as an option
  • Able to be ASME code-stamped for high temperature and pressure
  • Use of cyclone “blanks” allows for operational flexibility where flow rates may change from the original design conditions
  • Continuous or intermittent solids discharge
  • Assembly tools provided for easy installation or removal of hydrocyclones
  • Shipped fully assembled from the factor



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