Lyns Ltd - MSW SPP Series recycling plant

MSW Pre-processing 

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Introduction to MSW Pre-processing Equipment

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Pre-processing Plant Video

A.) Waste Pits Feed Conveyor System

1. Function: A crane feeds the raw materials from the waste pits onto a motorized feed conveyor. A central computer control system varies the rate of feed and to boot and close the system.

B.) Double Layer Finger Shape Vibration Screening System

1. Function: A motorized vibrating sieve. The double screens automatically sort the waste by the size of object. The first layer is a coarse finger shape screen and the second layer below this is a fine screen. The separated waste is then fed on two conveyors for further processing.

2. The main function of this unit is to separate the waste by size, for example, the coarse material e.g. garbage bags, stone, tiles, wood, fabric, plastic waste containers, bottles, etc.; and the mainly fine materials e.g. coal cinders, soil, small stones, glass, small batteries, sludge, etc. The coarse material conveyor system waste is fed into the breaking bags system to shred any plastic bags. The conveyor feeds the small screen waste to the rolling, bouncing Screen Machine to continue the screening.

3. A central computer control system varies the rate of feed and to boot and close the system.

C.) Bag Shredding System

1. Function: The bag shredding equipment is motor driven and is fed coarse waste from the coarse vibrating sieve. The unit shreds the plastic trash bags and is then fed to the coarse sieve screen and manual screening stations. Plastic bags from 5 ~ 50 cms are shredded extremely fast.

2. A central computer control system varies the rate of feed and to boot and close the system.

D.) Stellate Gear Rolling Bouncing Screening Equipment

1. Function: This screening equipment and the double layer finger shape vibration screening equipment continuously screens all incoming waste and has an independent motorized power supply. All the fine waste is fed to this small/fine screen equipment. The coarse and fine material is fed onto conveyors through a magnetic separation system to separate the fine metals.

2. A central computer control system varies the rate of feed and to boot and close the system.

E.) Small Footprint Manual Screening Station Conveyor System And Suction Bag System

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1. This manual screening station is designed for short pipeline length and floor space, It has three sections and three layers to connect to the conveyors, each section is 20 metres and total length is 60 meters. The three-dimensional overlap has a feed down conveyor convergence system and has its own motorized power supply.

2. The screening station has nine semi-automatic air suction devices for plastic bag screening.

3. Magnetic Separator System: this screening station has a front and rear magnetic separation system. The screened waste is now manually screened to ensure all non-magnetic metals are removed.

4. Below the screening station there is a waste recycling conveyor system: Below the manual screening station platform, there are three recycling conveyors which send the manual screening recycled products into next double layer conveyor for secondary manual sorting.

5. A double-layer secondary manual screening recovery system:

From previous manual screening station the recyclable waste is returned into the system for a second time for fine sieve classification, these remaining items are for further processing such as cloth, diapers and so on.

6. A central computer control system varies the rate of feed and to boot and close the system.

F.) Heavy Duty Grinding Equipment

This equipment is an independent motorized engine and power console. It has very powerful pulverizing capability and has the following function: after the manual selection by the front-end screening stations the large waste items such as furniture and wood are crushed into small ‘fluffy’ particles for fermentation into organic matter. The quality of the fermentation process is related to the contents of the organic raw materials. The ‘fluffy’ fermentation of organic materials allows oxygen easy access to ferment the compost by activating the bacteria faster therefore improving the timing and quality of the compost.

G.) Plastic Bag Suction Equipment

1. Functions: The large suction equipment are installed in front of each of the initial screening stations and the drum sieve. There are a total of nine suction bag hoods (6 in the initial stage and a further 3 in the dump). The process is semi-automatic and it sucks the waste plastic bags for further processing.

2. The plastic bag processing: The front-end screening station automatically sucks the plastic bags, and then they are automatically fed into the isolation pulse unit. At the bottom of the unit there are automatic valves to emit the plastic bags to a conveyor. The pulse equipment separates the bags and dust, dust entering to the dust collection equipment, plastic bags through the valve, plastic bags collect in the buffer pool and then transferred to a special infrared conveyor. This special conveyor has infrared sensors for computer-controlled screening.

3. A central computer control system varies the rate of feed and to open and close the valves

H.) Plastic Bag Induction System and Automatic Positioning Screening System

1. Function: This state of the art automatic computer controlled system controls the various plastic products by utilising a high-tech sensor positioning system to identify the various plastic components. Data is fed into the computer system by the sensors and in turn segregates the plastic by the positioning system. The system can size nine different plastic components and the customer can change the setup depending on the various plastic waste components.

2. This system has independent power and automatic computer controls.

I) The Plastic Bag Cleaning and Sewage Treatment Systems

1. The mesh drum washer utilizes strong water and a biochemical formula for the cleansing of the plastic bags.

2. The sewage treatment system: the cleaning pools and sewage treatment pond is a matched system. The sludge and dirty water are automatically emitted and converted into recycled clean water by chemical and precipitation treatment. A sewage disposal system is used for other wastewater treatment.

3. This system has it’s own motors and an independent PLC automatic control.

J.) Automatic Plastic Extrusion Baler

Function: This baling unit is designed to squeeze and pack the ‘fluffy’ bags, plastic and paper containers into bales. This saves space and handling is more convenient. This unit is controlled by an independent PLC automatic system, which will automatically feed the bales onto a conveyor. The user can adjust compression the speed and packing weight.

K.) Insecticide and Deodorant Spray System

Deodorant sprinkler systems: deodorant & insecticide spray guns are installed in the waste feed pits, manual screening station and all the exposed pit roofs.

1. In addition fine nozzle spray guns are installed in the selection and fermentation plant workshop roof space so all areas are covered. This will remove all smells and insects.

2. There are two kinds of deodorants; chemical deodorant – vegetable type (high-tech extraction) which is harmless to the human body. The other type is a biological deodorant, derived from organic fertilizer and this is the preferred option.

L.) PLC Computer Control and Monitoring System

1. The whole screening system is controlled automatically by an advanced a PLC computer control system and positioning system. It controls the main power, conveyor speeds and ancillary system devices and all displayed on an annunciator panel.

2. A computer screen displays the performance and all services.

3. A fast computer printer is used for data logging and records.