Automated cranes for wood-fired cogeneration power stations

在HH-Lohbrügge木热电联产电站

清洁能源,以造福于环境

Wood-fired cogeneration power stations offering combined heating and power generation play an important role in climate protection. Fully automated Demag crane installations ensure that solid fuel is stored and supplied to the wood firing system to meet demand.

  • 安装全天候的可靠运行
  • 节省空间的解决方案由于存储掩体
  • 干净的电源系统,无需任何排放
  • 自动混合操作保证均匀的焚烧率

The power station in Hamburg-Lohbrügge

Facility concept shows the way

The use of scrap wood not only produces clean energy, but also offers high efficiency: CO2 emissions are reduced and stocks of fossil fuels are spared. An example for such ecological and economical system solutions is the wood-fired cogeneration power station in Hamburg-Lohbrügge, which generates some 13 million kilowatt hours of electricity from renewable resources every year. Only natural woodchips from forestry and landscaping work are used. The heat generated at the same time – some 60,000 MWh – is delivered to a neighbouring district heating plant, which supplies more than 8,000 households. Combined heating and power generation provide the best possible use of the energy contained in wood solid fuel – with a utilisation factor of 85%.

The owner, KWA Bioenergie GmbH und Co. Kraftwerk Lohbrügge KG, invested a total of EUR 13 million in the construction of the wood-fired cogeneration power station in Hamburg. The installation, which was designed by Schuler Consulting Engineers based in Bietigheim-Bissingen, cuts annual carbon dioxide output by some 23,000 tonnes.

在路德维希的第二发电站,是由设计舒勒,一个德马格过程起重机还确保了材料被存储和燃料被有效和可靠地提供。必威体育

Automated crane solution

Focus on automation

专用起重机技术发挥在汉堡Lohbrügge(HHKW)木热电联产电站的过程中发挥关键作用。该自动化的解决方案确保了安装的可用性和达到最大的效率,同时保持柔韧性。

全自动双梁桥式起重机,正是由于德马格仓库管理计算机(WMC)控制。必威体育由特种起重机执行的任务包括:

  • Rapid clearance of the tipping positions
  • 在三个预定义的存储区中的燃料材料的存储
  • 供应柴火焚烧系统与燃料混合相应

Crane data at a glance:

  • 负载能力:11吨
  • Span: 16,400 mm
  • Lifting height: 24,500 mm
  • 可变长/交叉旅行和升降速度:50/40/50米/分钟。
  • 多瓣抓斗:8立方米容量

The motor-driven multi-jaw grab is specially designed for handling wood, since the material is delivered to the facility in its natural state. The unit reliably picks up loads ranging from finely shredded wood to small branches and compacted material.

At least 140 m³ of material has to be handled per hour. The tipping pit needs to be cleared quickly to avoid lengthy waiting times for incoming trucks and any bottlenecks.

一个干净的解决方案

木热电联产电站与他们的综合筒仓计划,以实现空间的最佳利用。出于这个原因,具有自动起重机溶液被赋予了由轮式装载机服务存储偏好,例如。这种替代不仅会造成更多的废气及更高的噪声排放,也将需要更多的员工来操作店。

Processes

在供应过程中的安全和可靠的负载处理

大约32,000吨木片在汉堡每年提供给燃木热电联产电站。到300立方米倾翻坑的访问是由一个集成的磁卡扫描系统来控制。一旦卡车已经通过称重站传递,阻挡被打开并且倾翻位置上方的区域被阻止任何吊车操作,以防止因掉落材料抓斗损坏。一旦卡车已经沉积其负载,起重机接收命令以开始清除倾翻坑。预先,在安装人员检查传入材料的质量,并将其分配到三个先前定义的燃料等级,这是根据三个存储区指定的一个。自动起重机存储在由各类木仓的固体燃料。

从起重机长和横行程运动导致的任何摇摆由德马格有源负载摇阻尼系统消除。必威体育这可确保操作安全,因为通过对墙壁抢任何冲突得以避免。

Fill level monitoring in the silo

除了商店,其具有900立方米的容量,也有大约700立方米的燃料的筒仓。从这里,燃料通过滑动部分输送到炉。在贮仓中的填充水平是通过固定的传感器监控。一旦达到最小填充水平,自动确保起重机的控制系统,该筒仓补给燃料的所需量。

混合和存储策略

除了其实际的运输任务,过程起重机还负责混合材料。做这个需要,例如,如果质量保证揭示了从美化工作所产生的木材屑过于潮湿或不符合最低热效率的要求,因此,他们必须从森林资源的优质木材混合。一旦所要求的混合比已经经由德马格WMS的用户界面组,起重机自动接近三个相应的区,拾取在贮仓中的材料和共混物它。必威体育

Further strategies were included in the control system by the crane supplier. For example, when the grab buries itself in the material to pick up a load, the grab jaws are not initially fully closed. The crane takes the strain and a small amount of material trickles out. The grab can then be closed with the optimum fill level.