Chemical Peeler Centrifuge (HX)
Chemical Peeler Centrifuge (HX)
The Chemical Peeler Centrifuge is designed for high throughput industrial liquid or solid separation applications.
The Chemical Peeler Centrifuge offers fast and efficient filtration for chemical applications on an industrial scale, in an automatic and sealed environment. It is used for the production of chemical products where it is absolutely necessary to avoid contact between the product and the operators.
This version for the chemical industry, with a perforated basket or with rotating siphon, is normally used on products with good filterability. The cycle (loading, washing, centrifuging and cutting) can be performed at maximum speed, for high production rates while reaching lower residual liquid (or moisture).
Production Cycle and Design Advantages
Overview
Loading
The solid-liquid suspension (slurry) is fed through the feed pipe into the centrifuge. The slurry moves towards the filter cloth under the action of centrifugal force, and onto a perforated basket. The solid part of the suspension is retained by the filter cloth, forming a cake, while the liquid filters through the cake, through the filter cloth, and through the holes of the basket. The growth of the cake thickness is controlled by a mechanical or laser cake detector, which can automatically stop the feeding phase when the desired cake thickness is reached.
Cake Washing
Cake washing removes any impurities present in the cake. The washing liquid is distributed onto the product in the basket, through nozzles located along the washing pipe. The liquid passes through the product, then passes from the filter cloth and the holes of the basket, removing impurities present in the cake.
Centrifugation
Once the washing phase is complete, the centrifuge accelerates to the maximum speed and maintains that speed for a given amount of time to achieve the desired level of residual humidity in the product. At the end of the centrifugation, the centrifuge decelerates to the discharge speed.
Discharge
After reaching the discharge speed, the knife increment command is activated. The scraping knife starts cutting the cake, moving the product into the screw conveyor or discharge chute and into the product collection systems (drums, bin, dryers, mixers).
Heel cake removal
At the end of the product discharge phase, a heel cake of about 4-5 mm remains on the filtering cloth. This heel cake can be removed, to improve the filterability of the product, through the high-pressure nitrogen blow from the outside diameter of the basket.
Clean in Place (C.I.P.)
The centrifuge should be cleaned at every change of product to avoid cross contamination between campaign productions. The fully automated centrifuge cleaning system is composed of 2 main stages: Washing Machine Effect and cleaning with spray balls, which can be alternated to achieve maximum cleaning and to optimize the consumption of the cleaning liquid.
Main Components - Centrifuge with Perforated Basket
- Knife
- Feed pipe
- Wash pipe
- Screw conveyor
- Solid discharge flange
- Manual closing system
- Sight glass
- Screw conveyor gearbox and motor
Main Components - Centrifuge with Rotary Siphon
- Automatic clamping ring (only for HX/L/S 1850/1300 and 2000/1400)
- Knife
- Feed pipe
- Screw conveyor
- Solid discharge chute
- Motor
- Basket inspection door
- Light glass
- Sight glass
- Liquid discharge outlet
Main Components - Centrifuge with Rotary Siphon
- Knife
- Screw conveyor
- Skimmer (if necessary)
- Feed pipe
- Wash pipe
- Basket
Typical Applications
- Petrochemical
- Intermediates
- Catalysts
- Chlorides
- Calcium Compounds
- Sodium Compounds
- Amino Acids
- Agrochemical
- Fertilizers
- Herbicides
- Pesticides
- Fungicides
- Active Ingredients
Highlights
- Ideal for chemical applications
- Horizontal basket assures even loading and uniform cake distribution
- Lower residual cake moisture due to high centrifugal forces
- Perforated basket or rotary siphon basket
- Cake peeling at full rotational speed, obtaining a high hourly production
- Laser cake detector (external to the process chamber)
- Visual access to the process area from the front door and inspection ports
- No contact between the operator and product during operation
- Excellent wash result
- Increased filtration capacity. The creation of a vacuum beneath the filter cloth increases the filtration pressure and boosts the filtration rate (fast filtration) (rotary siphon centrifuge)
- Regeneration of the residual heel by backwash through the filter media increases the heel filterability without removing it (rotary siphon centrifuge)
- Sizes range from 500mm (19.7 in.) diameter to 2000mm diameter (78.7 in.) – See chart below
Discharge
- Discharge at maximum speed
- Knife scraper blade (peeler)
- Steep solids discharge chute or screw conveyor
- Heel removal assist with optional reverse blow back
Control Options
- Automatic operation
- Complete PLC controls with touch-screen interface
- Switch between automatic, semiautomatic, and manual operation
- Variable frequency drive (VRD) speed control
- Automatic clamping ring for comfortable and quick front door opening/closing – available only for HX/L/S 1850/1300 and 2000/1400
- ATEX electrical enclosures
- Optional instrumentation integrated into the control system including oxygen monitoring, temperature, pressure, liquid feed flow, N2 purge flow, effluent particle detection and fluid clarity
Cleaning
- The highly effective C.I.P. system (Clean-in- Place) uses a Washing Machine Effect cycle and spray balls
- Multi-purpose application: The C.I.P. system avoids cross-contamination between products from one campaign production to another, which makes the machine suitable for multi-purpose applications
- Washing Machine Effect
- The centrifuge is filled with the washing liquid up to a predetermined height and is put in rotation. During the automatic washing sequence, the basket rotates both clockwise and counterclockwise. The knife goes in and out so that the washing liquid reaches all points of the process area, including the discharge chute.
- Cleaning with spray balls
- The washing liquid is sprayed through spray balls on all the surfaces of the process area to completely remove any residue of product still present
Machine Characteristics
- Pressure tight to 400mm H20 (0.6 psig)
- Inert gas purging
- Installation on concrete or carbon steel inertia base with anti-vibration dampers
- Easily replaceable endless filter cloth, thermo-welded, in polypropylene, PEEK, Halar, PTFE, or metallic of various weaves and sizes
- Construction materials
- Parts in contact with the product: all stainless steels and special alloys are available, such as AISI 316L, AISI 904L, hastelloy, monel, alloy 59, 254 SMO, nickel, titanium, SAF 2205
- Surface coating option: Halar (ECTFE)
- Elastomers: antistatic and FDA certified, Teflon ETFE, and hard rubber
Technical Services
- Field service and technical support available
- Mechanical and electrical parts
- Process control and maintenance manuals
- Certifications and construction documentation
- Mechanical and electrical upgrades
Standard Sizes and Technical Data
| Centrifuge model: HX Unit |
Basket Diameter mm |
Filtering Surface m2 |
Cake Volume liter |
Max Load kg |
Max Speed RPM |
G Factor xg |
Weight With no Motor kg |
With Inertia Base & Motor kg |
| 500/150 | 500 | 0.24 | 15 | 19 | 2700 | 2037 | 650 | 1700 |
| 650/180 | 650 | 0.37 | 27 | 34 | 2400 | 2093 | 1400 | 3100 |
| 650/320 | 650 | 0.65 | 48 | 60 | 2400 | 2093 | 1550 | 3800 |
| 850/400 | 850 | 1.06 | 96 | 120 | 1900 | 1715 | 2750 | 6300 |
| 850/500 | 850 | 1.33 | 120 | 165 | 1900 | 1715 | 3200 | 7600 |
| 1000/500 | 1000 | 1.57 | 165 | 206 | 1550 | 1343 | 3600 | 12300 |
| 1000/650 | 1000 | 2.04 | 215 | 269 | 1550 | 1343 | 4200 | 12800 |
| 1250/650 | 1250 | 2.55 | 346 | 433 | 1300 | 1180 | 6500 | 16000 |
| 1300/850 | 1300 | 3.47 | 500 | 700 | 1250 | 1135 | 8500 | 21000 |
| 1700/920 | 1700 | 4.91 | 922 | 1290 | 1030 | 1000 | 14000 | 42000 |
| 1700/1150 | 1700 | 6.14 | 1152 | 1614 | 1030 | 1000 | 26000 | 58000 |
| 1850/1300 | 1850 | 7.55 | 1520 | 2130 | 985 | 1003 | 26000 | 58000 |
| 2000/1440 | 2010 | 9 | 2023 | 2823 | 950 | 1000 | 32500 | 70000 |
| 2100/1550 | 2100 | 10.2 | 2328 | 3260 | 900 | 950 | 33500 | 73000 |
