Earth Equipment Supply a new CRS Recycling Plant to Smith Recycling
12th September 2016
Earth Equipment are extremely excited to announce the installation of a state of the art CRS new recycling plant with Smith Recycling in Milton Keynes. The new recycling plant consists of a combination of a lights (C&I) line and a heavies (C&D) line in one system. This new recycling plant is using the space provided to its uttermost capabilities achieving exceptional results.
Utilising a finger screen just after the feeder, the material is separated into a 100mm minus fraction and a 100mm plus fraction. 100mm plus going straight ahead onto a 1500mm wide conveyor belt straight into a 6 bay picking station. The 100mm minus drops through the fingers of the finger screen and then goes into a 820 trommel, where the 40mm minus is extracted and then goes through a separate fines clean up plant. The 40mm plus goes forward onto a 1200mm wide conveyor belt straight into a 6 bay picking cabin where the different materials are recovered. This new recycling plant has been designed to keep the footprint within a certain size whilst maximising throughput potential, therefore we have combined the C&I line (1500mm wide belt) and the C&D line (1200mm wide belt) into the one colossal picking cabin. both lines then after the picking cabin go through a magnetic separator and then to a ASU (Air Separation Unit) to give a very clean hardcore. (If you would like to discuss this plant or a recycling plant that you have in mind please do get in contact)
Using the accumulated knowledge of Earth Equipment, the knowledge of Luke Smith and Paul Usher (Smith Recycling Milton Keynes) who knew what they wanted and how they wanted it combined with the immense engineering capabilities of CRS we were able to produce the ultimate solution for Smith Recycling achieving and out performing any prerequisite.
Thank you to Smith Recycling for the trust in Earth Equipment to supply the solution for their recycling needs with this exceptional new recycling plant.
Why Use a Static Recycling Plant Picking Station
The days of a skip being tipped on the ground and numerous labourers crowding around to separate the materials on the ground is a thing of the past, whilst some operators still use this technique it is dangerous practice and a very slow way to carry out this task. The utilisation of a static recycling plant means that material from a skip is tipped up on the ground, an excavator with grab then drops that material into a large hopper where it is sorted by means of mechanical or manual means presenting it to manual pickers in a safe and measured way.
The general process of a simple static recycling plant includes:-
Feeder – material is fed into a feeder with a grab, the feeder has a variable speed control
Trommel or Screen – the use of either a trommel or a screen depends upon the waste stream and the piece size required, generally C&I (commercial and Industrial) waste is screened with a flat deck screen, whereas C&D (construction & demolition) waste is generally screened through a trommel.
- Trommel – Material enters the trommel and gets tumbled around and around, the outer circumference of the drum is perforated with the required hole size, i.e. 40mm. As the material tumbles around the drum, the fines are liberated and sift through the holes. This process reduces the weight of the input material and means that oversize material is cleaner to sort. (See fines system to see how the -40mm material is sorted). Trommel screens are generally used with C&D (construction & Demolition) waste or in line with a screen in various other recycling plants.
- Screen – The use of a screen is very useful with C&I material because large bulky material that would get tumbled and tangled in a trommel doesn’t get treated the same way with a flat deck screen. Screens vibrate with a linear motion, so the screen is positioned at a decline angle. With the use of fingers or punch plate or both the material is then sifted through the holes in that media. The draw back of the screen is that sometimes material can sit on top of a large piece of card board or plastic and vibrate down the screen but not get separated. Screens have to be setup the right way and it is very important to get the right screening decks in the unit.
Picking Station – After the material is screened it is then ready to enter the picking station where manual labour is used to separate the recyclable materials, i.e. cardboard, wood, hard plastics, soft plastics etc…
Magnet – the material then travels under an over band magnet which will pull out the ferrous material and drop it into a designated bay
Eddy Current – not a lot of plants utilise eddy currents as they are very expensive, but the eddy current similar to the magnet will separate the non ferrous metal material and drop it into a designated bay
Air Seperation Unit (ASU) – This is generally the last stage of the process, as the material reaches the end of the belt, most recyclables have been picked out, the ASU is a drum separator with an air knife blowing against it. The drum rotates and can be moved closer, further away, higher or lower depending upon the density of the material to be separated. The hardcore is too dense so it drops, paper and card is blown against or over the drum, when the card or paper is saturated with water it is more dense, so with the assistance of the movable rotating drum it will travel over the drum and drop in the designated lights bay keeping the hard core clean.
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