The turnkey straw plant in St. Merlose has ensured large savings on straw and contributed to a reduction in CO2 emission.</p>
<p>consumers, some of which are large consumers. Until 1988 an oil based heating plant supplied the area, before the switch to straw was made. In early 2013 Linka was tasked with delivering a new, turnkey straw plant, which will supply the entire area with reliable, CO2 neutral heat. In addition to delivering the complete machine plant Linka was also responsible for building the boiler room and a 550 m2 straw storage.</p>
<p>Once again straw was chosen as fuel, since this is the cheapest source for heating. In addition straw is also a CO2 neutral heating source.</p>
<p>St. Merlose has an annual consumption of 3,000 tons of straw, all supplied by local farmers.

The straw plant at St. Merlose consists of a large 4,500 kW hot water boiler in 5-pass. The boiler is hereby designed for a better exploitation of the heat which results in better efficiencies and larger savings on fuel. In addition the boiler is designed for an operating pressure of 6 bars.</p>
<p>A straw crane ensures automatic fuel feed, where the straw bale is picked up from the storage and delivered into a safety box, also placed in the storage. The straw bale is then hydraulically moved into the cutter, which cuts off a slice that is fed into the boiler.</p>
<p>In addition a 1,000 m3 accumulator tank is installed. This can hold one million liters of water and hereby supply the entire area for 1-2 days, e.g. during service.</p>
<p>The automatic ash removal system transports the ash from the boiler to a 15 m3 ash container, placed outside the building. In addition a 4,500 kW oil boiler is installed as backup.

In the autumn of 2016 Linka delivered a new boiler system for Osterild District Heating. By using wood chips as fuel the heating plant can offer their customers 100 % CO2 neutral heat, while achieving large savings on fuel costs.

The Danish district heating plant has supplied the citizens of Osterild since 1991. Today more than 250 consumers are attached to the plant, and their overall heat consumption is 5.5 million kWh per year.

Before installation of the new boiler Osterild used wood pellets for heating, and oil during periods with an extra high heating demand. Wood chips are generally cheaper and the heating plant has chosen to use dry forest chips in the future. This will be delivered from local forests. An existing wood chips storage and crane unit is reused,

while Linka has installed a new feeder funnel. The boiler’s automatic ash removal system will be attached to the existing ash system, which is also being reused.

With the new wood chips plant Osterild will replace the use of oil, even during the coldest season. The existing oil boiler will only be used as a backup.

Linka delivered a complete boiler system with a 2,000 kW Linka H boiler, designed for a maximum operating pressure of 4 bars and a maximum flow temperature of 110°C.

16 pressure tanks with soot valves are mounted on the boiler. These eject air through the boiler’s flue pipes to keep them clean. An additional six soot valves are mounted on the back of the boiler for cleaning the second flue pass. This means that manual cleaning is only necessary a few times every year.

A PLC control system is installed on the plant for monitoring the performance of the system. The control system can be accessed through an internet connection, which enables online service and trimming from Linka.

In 2016 Boulstrup-Hou Heating Plant needed to expand their capacity, and once again Linka was chosen as the turnkey supplier of the new straw plant.

The Danish heating plant has been delivering heat for the entire Boulstrup-Hou area for more than 20 years. Since 2009 the heat has been supplied by a Linka straw plant. The heating plant has more than 650 consumers attached including some large consumers.

In 2009 Linka delivered a 950 kW straw plant for Boulstrup-Hou, which could now offer their users CO2 neutral heat.

Boulstrup-Hou needed to replace their existing straw plant with a new, larger plant in 2016, so they could double their capacity.

The heating plant had their older straw shredder replaced in 2013, with a larger TWIN shredder with a 24 meter double conveyor. These were adjusted for the new plant in 2016, so they could be reused. The straw is still being supplied by local suppliers.

As a turnkey contractor Linka was responsible for delivering a new biomass plant along with building a new boiler room and converting their existing building to the new, larger plant.

The new straw plant in Boulstrup-Hou consists of a 2,000 kW Linka H boiler designed for a maximum operating pressure of 6 bars. With a built-in step grate and Linka’s patented combustion technology, a complete burnout of the straw is ensured. A bag filter is also installed, where the flue gas is cleaned to reduce dust from the plant.

A high automation is achieved by adding an automatic string remover onto the existing conveyor. Earlier the conveyor was filled manually twice a day, but in June 2017 Linka installed a straw crane, which will fill the conveyor automatically and hereby reduce the operational need.

In addition an external ash container is placed outside the building. The ash is automatically transported from the boiler to the container.