SYSAV doubles efficiency with LYYN

Sysav South Scania Waste Company, receives, recycles and treats waste from households and businesses in southern Skåne. The company is owned by 14 municipalities with a joint population of over 665,000 and has approximately 6,000 companies as customers.

One of Sysavs methods for waste management is to incinerate and recycle energy in form of district heating and electricity. Sysav’s waste-to-energy plant has four boilers. The two oldest came into operation in 1973. They are hot-water boilers which produce district heating. Both the boilers and the system for cleaning flue gases have been reconditioned and developed in line with heightened demands on waste combustion. The two newest boilers are steam boilers and generate both electricity and district heating. They came online in 2003 and 2008 respectively.

In total, Sysav is permitted to use 550,000 tonnes of waste a year as fuel. The plant produces approximately 1,400,000 MWh of district heating a year, which roughly equates to the district heating of 70,000 small houses. The steam boilers produced around 250,000 MWh of electricity a year in total, some of which is used in the plant itself.

The Problem

The Plant incinerates 70 tonnes of waste per hour. This creates a large amount of slag and bottom ashes which is cooled with water.  The slag is then moved to a bunker for loading onto trucks for transport to an assortment process.

The loading is supervised by an operator in a control room or remotely operated from the central control room. The central control room has no visual contact with the bunker and the process is controlled with the assistance of video cameras and monitors.

The slag is hot and moist, and in lower outside temperatures a high amount of steam is created with every lift. Normally 2-3 lifts can be done before the visibility becomes too low for continuation of the operation.

Waiting time before the operation can continue is about 30 minutes.

The Solution

In the remote controlled video system a LYYN T38 was installed. This give the operator a n improved visibility and improved efficiency.

The operators estimate that it is now possible to make 6-7 lifts before the visibility gets too bad. This means a 100% performance increase in this process stage.

Loading slag on truck