A recent example of an integrated project
undertaken by WellmanWulff describes
activities at the Shell green site in widnes,
home to the Mersey Valley Processing
centre.

WellmanWulff successfully manufactured
and installed a heat recovery steam
generator (HRSG), a type of waste heat
recovery unit, and associated equipment as
part of a complex sludge incinerator plant.

The need was driven by United Utilities
implementing a complete revamp of its
dewatering plant.

The total project, known as Shell Green –
Stream 3 Joint Venture – has been lead by
Veolia and Costain. The objective was to
design and install a stationary fluidised bed
combustor, waste heat boiler, steam turbine
and flue gas cleaning system.

WellmanWulff ‘s responsibility lay with
ensuring the integrated plant took the waste
heat gas from the fluidised bed incinerator,
and passed it through a two-pass boiler
producing 16,000kg/h of steam at 40bar, at
a temperature of 400°C. This superheated
steam is then used to generate electrical
power via a steam turbine.

WellmanWulff also manufactured and
installed a large economiser, steam drum,
electro static precipitator and ash silo
system. In the final phases of the process,
the flue gases enter the ESP, where most
particulates from the gas stream are
removed.