Process and apparatus for adjusting the filling level in a floating bed reactor

A process for adjusting the filling level in a gasifier for carbonaceous material in the form of a floating bed reactor, in which biomass and/or coke (K) is transformed into a product gas, comprising the steps of:

• providing a substantially conical, downwardly tapering floating bed reactor comprising an upper reactor ceiling and a lower inlet opening into which biomass and/or coke (K) are introduced into the floating bed reactor from below and a gaseous gasification agent (V) is introduced upwardly, so that a fixed bed, which is elevated from the location of the inlet opening and held in suspension, forms within the conical reactor,
• wherein the flow rate of the gaseous gasification agent (V) together with the biomass and/or the coke (K) is adapted in such a way to the shape of the flow cross-section of the conical reactor taking into account the material properties of the biomass and/or the coke that a stable bed held in suspension is formed in the floating bed reactor,
• wherein the filling level of the fixed bed held in suspension within the floating bed reactor is adjusted by
• extracting gas, together with particles, through an extraction pipe in the reactor ceiling, which pipe protrudes downwardly into the reactor room, wherein the position of the lower end of the extraction pipe defines the upper position of the floating bed within the reactor.