A downward mobile gasification boiler for surface gas-phase combustion and pyrolysis of biomass briquette is provided. The boiler includes a gasification combustion chamber, a gas combustion chamber, a stranding cage slag remover, a heat exchanger, a water jacket, an air duct and an air distribution system. The air duct connected with the air distribution system is arranged in the inner cavity of the wall surface of the gasification combustion chamber. The gas combustion chamber is arranged at the upper part of the gasification combustion chamber, and an air outlet is arranged, in the middle to communicate the gas combustion chamber with the gasification combustion chamber. The lower part of a port of the gasification combustion chamber is provided with a twisting cage slag remover.

A reactor system and control method. The method includes feeding solid fuel and oxygen containing gas to a first fluidized bed reactor to form a fluidized bed of particles and combusting a first portion of the fuel in the bed with the oxygen containing gas to generate hot bed particles and a first stream of hot flue gas, conveying the first stream to the flue gas channel, transferring hot bed particles including a second portion of the solid fuel at a predetermined hot particles transfer rate from the first reactor to a second fluidized bed reactor, feeding fluidizing gas to the second reactor to form a second fluidized bed, and transferring bed particles from the second reactor to the first. The method includes first and second operation modes. In the first, the fluidizing gas is oxygen containing gas and, in the second, the gas includes steam, CO.sub.2, or inert gas.

A reactor system and control method. The method includes feeding solid fuel and oxygen containing gas to a first fluidized bed reactor to form a fluidized bed of particles and combusting a first portion of the fuel in the bed with the oxygen containing gas to generate hot bed particles and a first stream of hot flue gas, conveying the first stream to the flue gas channel, transferring hot bed particles including a second portion of the solid fuel at a predetermined hot particles transfer rate from the first reactor to a second fluidized bed reactor, feeding fluidizing gas to the second reactor to form a second fluidized bed, and transferring bed particles from the second reactor to the first. The method includes first and second operation modes. In the first, the fluidizing gas is oxygen containing gas and, in the second, the gas includes steam, CO.sub.2, or inert gas.

The present disclosure relates to a non-electric, multifunctional, configurable pellet-burning system for domestic and industrial use, which has a removable burner and an inclined hot gas outlet duct that connects said burner of the system with a heat accumulator tank that operates as a second combustion chamber and as a particle filter.

Disclosed is an outdoor cooking appliance with a smoke generator that directs smoke into a cooking chamber of the appliance without significantly increasing the temperature therein. For example, the smoke generator can include an ignitor that combusts fuel and a fan that directs air and smoke from the combustion into the cooking chamber.

The invention relates to a combustion device for burning fuel such as wood, wood chips, wood pellets, or the like, wherein the combustion device comprises a first chamber and a second chamber, wherein the second chamber is arranged underneath the first chamber and the first chamber receives the fuel, wherein the first chamber comprises, at the bottom, an intermediate layer of combustible material which holds the fuel in the first chamber as long as the intermediate layer is not damaged or destroyed by combustion and such that, following damage to or destruction of the intermediate layer, fuel located in the first chamber falls into the second chamber, wherein, during the combustion process in the first chamber, substantially gas combustion is caused and, after the fuel has been conveyed into the second chamber, coal burning preferably occurs, or the fuel may be removed from the second chamber through an opening.

The invention relates to a combustion device for burning fuel such as wood, wood chips, wood pellets, or the like, wherein the combustion device comprises a first chamber and a second chamber, wherein the second chamber is arranged underneath the first chamber and the first chamber receives the fuel, wherein the first chamber comprises, at the bottom, an intermediate layer of combustible material which holds the fuel in the first chamber as long as the intermediate layer is not damaged or destroyed by combustion and such that, following damage to or destruction of the intermediate layer, fuel located in the first chamber falls into the second chamber, wherein, during the combustion process in the first chamber, substantially gas combustion is caused and, after the fuel has been conveyed into the second chamber, coal burning preferably occurs, or the fuel may be removed from the second chamber through an opening.

A dual-fuel fireplace apparatus is described. In one example, an apparatus includes an enclosure having a door disposed thereon and a wood burning compartment disposed within the enclosure. The wood burning compartment has an insulated housing configured to support temperatures associated with burning of wood within the wood burning compartment. A gas burning compartment is also disposed within the enclosure and has a gas burner disposed therein. A mechanism including a motor is configured to cause movement between a first mode in which the wood burning compartment is viewable through the door and a second mode in which the gas burning compartment is viewable through the door.

A smoke removal device, which can burn the particulates in the smoke efficiently, includes a tube body and a combustion unit. The combustion unit is provided in the tube body and includes a main body, a gas pipeline, and a lighter. The main body is located at a first end of the tube body. A smoke passage is formed between a periphery of the main body and an inner wall of the tube body, and the smoke enters the smoke removal device through the smoke passage. The main body has a central passage therethrough, where a fuel gas is ignited. The fuel gas is guided to the central passage through the gas pipeline and then ignited by the lighter to burn the smoke particulates passing through the smoke passage.

A boiler system having a series of boilers. Each boiler includes a shell having an upstream end, a downstream end, and a hollow interior. The boilers also have an oxidizer inlet entering the hollow interior adjacent the upstream end of the shell and a fuel nozzle positioned adjacent the upstream end of the shell for introducing fuel into the hollow interior of the shell. Each boiler includes a flue duct connected to the shell adjacent the downstream end for transporting flue gas from the hollow interior. Oxygen is delivered to the oxidizer inlet of the first boiler in the series. Flue gas from the immediately preceding boiler in the series is delivered through the oxidizer inlet of each boiler subsequent to the first boiler in the series.