Grate block family 206
Grate block family 206
A grate block width of 103mm was previously the standard for many waste to energy facilities. The permanent requirement to reduce downtime and maintenance costs, is obviously also valid for the heart of a waste incineration plant, the grate.
Double width
– half the effort
One approach to this is to double the width of grate blocks to 206mm, which has several advantages. On the one hand, the width of 206mm allows the blocks to be bolted together to a stable row. This results in saving of many parts previously required, such as elaborately manufactured tie rods, but, nevertheless, the undesirable tendency of individual blocks to stand up is reduced.
In addition, eliminating numerous parts saves a significant amount of working hours, so the EL Grate Block 206 is contributing to the reduction of maintenance costs.
As a further benefit, doubling the width of each block halves the number of gaps between the blocks, thereby reducing ash leakages.
The number of primary air holes has been reduced by half, while the total outlet area of the primary air has been kept the same. This significantly reduces the clogging tendency of primary air holes during operation and thus ensures a permanently homogeneous air distribution.
In the course of the development the topology of the grate block was optimised based on the mechanical and thermal loads. On the one hand, this results in a weight close to 25kg for a 206 block – a saving of approx. 25% compared to two standard blocks of 103mm; nevertheless, the service life of the previous 103 block was at least maintained.
Compared to the standard block, the 206 has the same outlet area for the primary air, based on 2 standard blocks. This significantly reduces the tendency for primary air holes to get clogged during operation.
The above advantages also apply to the 206+. This block goes one step further in terms of primary air distribution; the primary air is guided through a channel that cools the entire front surface of the block. This reduces the tendency for the primary air supply to become blocked further, hence, it ensures a permanently homogeneous air distribution even under particularly demanding operating conditions.
Features
Material
Heat-resistant cast steel
Advantages
– Lower costs
Faster installation due to reduced number of parts. Significant reduction in labour hours and service costs.
– Less material
The bolted system eliminates many positions – lower costs and reduced inventory.
– Less grate throughfall
Fewer gaps in the grate and less lifting of individual blocks, thus less grate throughfall (ash throughfall)
206
206+
Dimensions
206x530x147 mm
206x563x147 mm
Weight
Primary air supply
Implementation
Application
Your contact person
Laurent Ludwig
CEO
Tel +41 56 511 03 33