NSI Equipments Pvt. Ltd. Meerut, Uttar Pradesh

Suspension / MountingAll the bottom driven basket centrifuges can be supplied either in 3 point type suspension or the newer 4 point type mounting (on VISCO Damper / Sordino Damper) anti vibration mounts.

Material of constructionCarbon Steel, Stainless Steel, Hastalloy, Rubber Lined, Fluoro Polymer Coatings like Halar (ECTFE), PVDF (ETFE ), Teflon (PFA) etc. Lining / Coating can be provided on the contact parts as well as on the exterior body for prevention from spillage and corrosive atmosphere.

Advantages of 4 Point Mounting

• Level of vibration is much lower & operates very smoothly.
• Can be mounted on upper floor and can be easily relocated.
• Almost negligible maintenance cost.
• Working area is free from abstracts and a clean area can be maintained.

Types / Models of Basket Centrifuges

• Pilot Plant Centrifuge
• Bottom Driven Top Discharge Type Centrifuge
• Bag Lifting Type Centrifuge
• Bottom Discharge Type Centrifuge with/without Scrapper
• Top Driven Bottom Discharge Centrifuge

Additional Features (Optional)

• Residual Heel (Cake Removal System)
• Cleaning in Place (CIP)
• Leak Test as per DIN 24 400
• Nitrogen Blanking System
• Speed Indication with Zero Speed Switch
• Automation
• Cake Sensor

Features

• Mechanical clutch pulley
• Standard 3 pendulum suspension
• Variable frequency drive (inverter)
• Inertia plate and anti vibration mounts (4 point mounting) Simple construction
• Low maintenance cost
• Suitable for sticky, hard and lumpy products

Application

• Centrifuges/Hydro Extractors are perfect for extraction of water/liquid in Pharmaceutical
• Chemical, Textile Industries and ETP plants.

Typical Bottom Discharge Cycle

• Feeding : A filter media is fixed to the cylindrical surface of a perforated basket. The feed slurry is directed to the basket wall using a feed pipe. Feeding is carried out while the basket is rotating at an appropriate speed. After the required cake is built, feeding is stopped. The centrifuge is run for some time to partially de-water the solids. Feeding can be repeated if there is adequate space for further build up of cake.
• Washing : After feeding, washing is carried out by pumping wash liquid through the wash pipe.
• Spinning : The basket is run at the spinning speed to complete the de-watering process.
• Scraping : The speed of the basket is reduced to the scraping speed (slow speed). A scraper knife cuts the solids, discharging them through the chute.
• Heel Removal - Optional : Some material remains on the filter media after scraping and is called residual heel. This heel can be removed by using the heel removal system.
• Cleaning In Place - Optional : The centrifuge can be cleaned using a CIP system.
• Dynamic Braking :The centrifuge basket is braked or slowed down using an electrical braking system. The back EMF generated by the motor when idling is used to create the breaking impulse. This braking ensures a safe and friction free means of halting the rotating assembly.
• Seperate heat sinks are given to ensure that the heat generated is dissipated effectively and the unit can be located even outdoors.

Advantages

• Cake Discharge in powder form.
• Solid discharge in closed environment
• Operation can be automated using a PLC.
• Heel Removal System enables regenerating of filter media.
• Toxic, allergic or hazardous material can be safely handled.
• Minimum attrition of crystal due to scraping at low speeds.
• No contact between product and operator during operation.
• Drastic reduction in manual labour due to discharge of filter cake with help of a scraper.

Material of construction

• Stainless Steel , Carbon Steel, Hastelloy, Rubber Lined , Fluoro Polymer Coating / Lining viz.- Halar (ECTFE), Teflon (PFA )
• Lining/ Coating can be provided not only on the contact parts but also on the exterior body for prevention from spillage and corrosive atmosphere.

NoteBottom Discharge Centrifuge is advised for a non-sticky crystalline product which can be easily cut by the scraper blade.