The present invention relates to the oxidative combustion of amine-containing wastewaters, especially in a process for preparing methacrolein. Methacrolein is used in chemical synthesis particularly as an intermediate for preparation of methacrylic acid, methyl methacrylate, or else of active ingredients, odorants or flavorings. More particularly, the present invention relates to an oxidative combustion of the amine-containing wastewaters with only low nitrogen oxide formation.

The present invention relates to the oxidative combustion of amine-containing wastewaters, especially in a process for preparing methacrolein. Methacrolein is used in chemical synthesis particularly as an intermediate for preparation of methacrylic acid, methyl methacrylate, or else of active ingredients, odorants or flavorings. More particularly, the present invention relates to an oxidative combustion of the amine-containing wastewaters with only low nitrogen oxide formation.

A stoker-type incinerator includes: a recirculated exhaust gas supply unit which allows exhaust gas resulting from treating combustion gas to reflux to a combustion gas channel via a recirculated exhaust gas nozzle provided on the combustion gas channel and supplies the exhaust gas as recirculated exhaust gas. The stoker-type incinerator further includes a secondary combustion air supply unit which supplies secondary combustion air on a downstream side of the recirculated exhaust gas nozzle on the combustion gas channel via a secondary combustion air nozzle provided on the combustion gas channel, in which the recirculated exhaust gas nozzle and the secondary combustion air nozzle are arranged in different positions in a plan view.

A stoker-type incinerator includes: a recirculated exhaust gas supply unit which allows exhaust gas resulting from treating combustion gas to reflux to a combustion gas channel via a recirculated exhaust gas nozzle provided on the combustion gas channel and supplies the exhaust gas as recirculated exhaust gas. The stoker-type incinerator further includes a secondary combustion air supply unit which supplies secondary combustion air on a downstream side of the recirculated exhaust gas nozzle on the combustion gas channel via a secondary combustion air nozzle provided on the combustion gas channel, in which the recirculated exhaust gas nozzle and the secondary combustion air nozzle are arranged in different positions in a plan view.

A method and device for chemical destruction of at least one feed comprising at least one organic compound are provided. The device comprises at least one inductive plasma torch, means for introducing at least one plasma-forming gas into the torch, optionally when the plasma gas(es) comprise(s) no or little oxygen, means for bringing oxygen gas into the plasma or into the vicinity of the plasma, means for introducing the feed into the torch, a reaction enclosure capable of allowing thermal destruction of the gases flowing from the torch, a device allowing mixing of the gases flowing out of the reaction enclosure to be carried out, means for introducing air and/or oxygen gas into the mixing device, a device allowing recombination by cooling of at least one portion of the gases from the mixing device, the torch, the reaction enclosure, the mixing device and the recombination device being in fluidic communication.

A method and device for chemical destruction of at least one feed comprising at least one organic compound are provided. The device comprises at least one inductive plasma torch, means for introducing at least one plasma-forming gas into the torch, optionally when the plasma gas(es) comprise(s) no or little oxygen, means for bringing oxygen gas into the plasma or into the vicinity of the plasma, means for introducing the feed into the torch, a reaction enclosure capable of allowing thermal destruction of the gases flowing from the torch, a device allowing mixing of the gases flowing out of the reaction enclosure to be carried out, means for introducing air and/or oxygen gas into the mixing device, a device allowing recombination by cooling of at least one portion of the gases from the mixing device, the torch, the reaction enclosure, the mixing device and the recombination device being in fluidic communication.

Disclosed is a system and method for the combustion of biomass material employing a swirling fluidized bed combustion (SFBC) chamber, and preferably a second stage combustion carried out in a cyclone separator. In the combustion chamber, primary air is introduced from a bottom air box that fluidizes the bed material and fuel, and staged secondary air is introduced in the tangential direction and at varied vertical positions in the combustion chamber so as to cause the materials in the combustion chamber (i.e., the mixture of air and particles) to swirl. The secondary air injection can have a significant effect on the air-fuel particle flow in the combustion chamber, and more particularly strengthens the swirling flow, promotes axial recirculation, increases particle mass fluxes in the combustion chamber, and retains more fuel particles in the combustion chamber. This process increases the residence time of the particle flow. The turbulent flow of the fuel particles and air is well mixed and mostly burned in the combustion chamber, with any unburned waste and particles being directed to the cyclone separator, where such unburned waste and particles are burned completely, and flying ash is divided and collected in a container connected to the cyclone separator, while dioxin production is significantly minimized if not altogether eliminated. A Stirling engine along with cooling system and engine control box is integrated with the SFBC chamber to produce electricity from the waste combustion process. Residual heat in the flue gas may be captured after the combustion chamber and directed to a fuel feeder to first dry the biomass. System exhaust is directed to a twisted tube-based shell and tube heat exchanger (STHE) and may produce hot water for space heating.

Disclosed is a system and method for the combustion of biomass material employing a swirling fluidized bed combustion (SFBC) chamber, and preferably a second stage combustion carried out in a cyclone separator. In the combustion chamber, primary air is introduced from a bottom air box that fluidizes the bed material and fuel, and staged secondary air is introduced in the tangential direction and at varied vertical positions in the combustion chamber so as to cause the materials in the combustion chamber (i.e., the mixture of air and particles) to swirl. The secondary air injection can have a significant effect on the air-fuel particle flow in the combustion chamber, and more particularly strengthens the swirling flow, promotes axial recirculation, increases particle mass fluxes in the combustion chamber, and retains more fuel particles in the combustion chamber. This process increases the residence time of the particle flow. The turbulent flow of the fuel particles and air is well mixed and mostly burned in the combustion chamber, with any unburned waste and particles being directed to the cyclone separator, where such unburned waste and particles are burned completely, and flying ash is divided and collected in a container connected to the cyclone separator, while dioxin production is significantly minimized if not altogether eliminated. A Stirling engine along with cooling system and engine control box is integrated with the SFBC chamber to produce electricity from the waste combustion process. Residual heat in the flue gas may be captured after the combustion chamber and directed to a fuel feeder to first dry the biomass. System exhaust is directed to a twisted tube-based shell and tube heat exchanger (STHE) and may produce hot water for space heating.

Disclosed is a combustion machine, including: a hopper, a drying mechanism and a combustion mechanism. The hopper is configured for storing materials and conveying the materials to the drying mechanism. The drying mechanism includes a conveying mechanism and a drying chamber, and the conveying mechanism is connected with the hopper and conveys the materials in the hopper to the drying chamber. The combustion mechanism includes a combustion chamber connected with the drying chamber via a material conveying pipeline, and a fire outlet pipe arranged in the combustion chamber and used for outputting flame. A hot air pipeline is connected between the combustion chamber and the drying chamber, and a first exhaust fan is arranged in the hot air pipeline.

Disclosed is a combustion machine, including: a hopper, a drying mechanism and a combustion mechanism. The hopper is configured for storing materials and conveying the materials to the drying mechanism. The drying mechanism includes a conveying mechanism and a drying chamber, and the conveying mechanism is connected with the hopper and conveys the materials in the hopper to the drying chamber. The combustion mechanism includes a combustion chamber connected with the drying chamber via a material conveying pipeline, and a fire outlet pipe arranged in the combustion chamber and used for outputting flame. A hot air pipeline is connected between the combustion chamber and the drying chamber, and a first exhaust fan is arranged in the hot air pipeline.