The Natural Philosopher wrote:

You would be better off making a small steam engine and burning your
rubbish.

Hmm...that IS a thought actually..and an electric fan once it gets going
to 'turbocharge' the boiler..

There are all kinds of regulations and qualifications needed when you
have a steam boiler, because they are dangerous when they blow up.
But to avoid that why have a steam reservoir at all? Just have a block
of hot steel, and inject some water when needed that turns into steam
and runs a turbine & generator.