Foster Wheeler Energia Oy

Amec Foster Wheeler Energia Oy

Corenso United Oy Ltd.

Juha Palonen

Jorma J Nieminen

Pekka Harkki

Lauri M&auml;kipaja

Markku It&auml;pelto

Juhani M Isaksson

Reijo J Kuivalainen

Eero J Berg

Pekka Lehtonen

Timo Eriksson

Katriina Nieminen, Legal Representative

Katja Häkkinen

Sami Kokki

Charles M Davis

A method of controlling a circulating fluidized bed gasifier includes feeding first and second portions of particulate material to be gasified through inlets in a gasifier. Oxygen and steam are fed through a bottom grid into a lower portion of the gasifier to fluidize the bed. Product gas and entrained particles are discharged from an upper portion of the gasifier. Particles are separated from the product gas and a portion of the separated particles is returned to the lower portion. A portion of the returned particles is oxidized to generate heat. Heat and oxidizing products from the lower portion are transferred to the center portion to generate the product gas. A ratio of the first and second portions of particulate material to be gasified is determined on the basis of a measured temperature profile so as to control the vertical temperature distribution in the gasifier.

Method of and apparatus for controlling a gasifier

A method of and an apparatus for gasifying carbonaceous material, the apparatus including a gasification reactor, to which oxygen-containing primary gas and secondary gasification gas are introduced, whereby a portion of the material to be gasified is gasified to product gas, residual carbon contained in the fly ash extracted from the product gas is combusted in a cyclone combustor, and the exhaust gas from the cyclone combustor is guided to above the bottom level of the gasification reactor to act as secondary gasification gas.

Method of and an apparatus for gasifying carbonaceous material

An apparatus for pneumatically conveying particulate material containing reaction products of a high pressure reactor from a supply vessel at a pressure of at least two bar to a receiving vessel at a considerably lower pressure. The apparatus includes a conveyor line attached to the supply vessel, a collecting vessel between the conveyor line and the receiving vessel, the collecting vessel including (i) a discharge conduit for the carrier gas, (ii) a device for controlling the discharge velocity of the carrier gas from the collecting vessel, and (iii) a device for controlling the pressure of the material collected in the collecting vessel, and a device for conveying the material directly from the collecting vessel to the receiving vessel essentially at the same pressure as is prevailing in the receiving vessel.

Method and apparatus for treating high pressure particulate material

A process for recovering metal material from waste material including organic material and metal material in the form of thin foil metal material. The process includes steps of introducing the waste material into a fluidized bed gasifier, introducing air through a bottom grid into the gasifier for fluidizing a bed of solid particles, for gasification of the organic material therein, and production of a combustible gas, discharging separately from the gasifier bottom ash and combustible gas produced in the gasification step, maintaining the temperature in the gasifier below the melting temperature of the metal material, tearing the thin foil metal material into small metal flakes in the fluidized bed, setting the velocity of the air in the fluidized bed such that the metal flakes are entrained with the produced combustible gas, but the not-gasified waste material and the bed particles stay in the bed, discharging the metal flakes from the gasifier together with the combustible gas and introducing the combustible gas discharged from the gasifier into a separator, for separating metal material from the combustible gas.

Process for recovering metal material from waste material

Process for recycling of liquid carton waste material or other similar waste material having fibrous, metal and plastics materials. The process includes introducing the waste material and a slushing liquid into a slushing apparatus and slushing of the waste material to thereby form defibrated fibrous material therein. The treated waste material is then separated into (i) a fiber suspension which includes the defibrated fibrous material, and (ii) a reject portion which includes the metal and plastics materials. The obtained fiber suspension is cleaned and the fibrous material therein is reclaimed for further use. The reject portion is introduced into a fluidized bed gasifier so as to gasify the plastics therein to produce a hydrocarbon product gas, which is thereafter separated from the metal material.

Liquid carton waste material recycling process and apparatus for recycling liquid carton waste material

In a fluidized bed reactor system having a gas cooler, with cooling surfaces, downstream of a first cyclone separator, the cooling surfaces are cleaned by introducing sufficient concentration of bed particles into the gas during, or just prior to, cooling, so that the particles mechanically dislodge deposits from, and thereby clean, the cooling surfaces. The particles are then removed downstream of the cooler by a second separator, and the bed particles separated by the second separator may be returned to the fluidized bed reactor at or just before the cooler to again be used to effect cooling. Cleaning may be practiced in spaced time intervals only (e.g. periodically or intermittently), or continuously. Where practiced intermittently the efficiency of operation of the first separator may be diminished by introducing a fluid stream, or a solid object, into the vortex flow within the first separator, so that a sufficient number and size of particles pass through the first separator so as to effect cooler cleaning.

Growing community of inventors

Varkaus, Finland

Juha Palonen