Disclosed is a waste thermal energy recovery device for optimizing machine, equipment and system efficiency by reducing energy released to the environment. A most outer heat insulation layer directs heat leakages to heat transfer chambers, functions as the last layer of heat transfer by circulating fresh air entering through the fresh air inlets, has an air flow space with the heat recovery outlet chamber, and a chimney outlet. A heat recovery outlet supplies fresh air with the heat recovered. A waste heat recovery inlet for waste fluid has thermal energy coming from the discharge fan of the machine or equipment to which the device is connected. An adapter cap provides adaptation of the device to the heat recovery outlet of the machine or equipment, insulates the fresh air inlets from the environment thermally, and provides that the fresh air inlet is made from the heat recovery outlet.

Disclosed is a waste thermal energy recovery device for optimizing machine, equipment and system efficiency by reducing energy released to the environment. A most outer heat insulation layer directs heat leakages to heat transfer chambers, functions as the last layer of heat transfer by circulating fresh air entering through the fresh air inlets, has an air flow space with the heat recovery outlet chamber, and a chimney outlet. A heat recovery outlet supplies fresh air with the heat recovered. A waste heat recovery inlet for waste fluid has thermal energy coming from the discharge fan of the machine or equipment to which the device is connected. An adapter cap provides adaptation of the device to the heat recovery outlet of the machine or equipment, insulates the fresh air inlets from the environment thermally, and provides that the fresh air inlet is made from the heat recovery outlet.

Disclosed is a waste thermal energy recovery device for optimizing machine, equipment and system efficiency by reducing energy released to the environment. A most outer heat insulation layer directs heat leakages to heat transfer chambers, functions as the last layer of heat transfer by circulating fresh air entering through the fresh air inlets, has an air flow space with the heat recovery outlet chamber, and a chimney outlet. A heat recovery outlet supplies fresh air with the heat recovered. A waste heat recovery inlet for waste fluid has thermal energy coming from the discharge fan of the machine or equipment to which the device is connected. An adapter cap provides adaptation of the device to the heat recovery outlet of the machine or equipment, insulates the fresh air inlets from the environment thermally, and provides that the fresh air inlet is made from the heat recovery outlet.

Disclosed is a waste thermal energy recovery device for optimizing machine, equipment and system efficiency by reducing energy released to the environment. A most outer heat insulation layer directs heat leakages to heat transfer chambers, functions as the last layer of heat transfer by circulating fresh air entering through the fresh air inlets, has an air flow space with the heat recovery outlet chamber, and a chimney outlet. A heat recovery outlet supplies fresh air with the heat recovered. A waste heat recovery inlet for waste fluid has thermal energy coming from the discharge fan of the machine or equipment to which the device is connected. An adapter cap provides adaptation of the device to the heat recovery outlet of the machine or equipment, insulates the fresh air inlets from the environment thermally, and provides that the fresh air inlet is made from the heat recovery outlet.

A system for crosslinking a continuous mat of mineral and/or plant fibers, includes a crosslinking oven for the mat including at least one heating box, each heating box being connected to a combustion chamber. The crosslinking system further includes an injection system arranged outside the crosslinking oven and configured to inject hot air into at least one combustion chamber of a heating box, the hot air thus injected replacing a given fraction of hot air produced by at least one burner attached to the said at least one combustion chamber.

A system for crosslinking a continuous mat of mineral and/or plant fibers, includes a crosslinking oven for the mat including at least one heating box, each heating box being connected to a combustion chamber. The crosslinking system further includes an injection system arranged outside the crosslinking oven and configured to inject hot air into at least one combustion chamber of a heating box, the hot air thus injected replacing a given fraction of hot air produced by at least one burner attached to the said at least one combustion chamber.

A cement clinker producing system, capable of providing a gas containing a carbon dioxide gas at a high concentration by increasing a carbon dioxide gas concentration for a part of an exhaust gas, includes a cyclone preheater to preheat a cement clinker raw material, a rotary kiln to burn the preheated cement clinker raw material so as to provide cement clinker, a calcination furnace to promote decarbonation of the cement clinker raw material, a clinker cooler to cool the cement clinker, a kiln exhaust-gas discharge passages to discharge an exhaust gas generated in the rotary kiln, a combustion-supporting gas supply device to supply a combustion-supporting gas having a higher oxygen concentration than air, a combustion-supporting gas supply passage to guide the combustion-supporting gas to the calcination furnace, and a calcination furnace exhaust-gas discharge passage to discharge a carbon dioxide gas-containing exhaust gas generated in the calcination furnace.

A cement clinker producing system, capable of providing a gas containing a carbon dioxide gas at a high concentration by increasing a carbon dioxide gas concentration for a part of an exhaust gas, includes a cyclone preheater to preheat a cement clinker raw material, a rotary kiln to burn the preheated cement clinker raw material so as to provide cement clinker, a calcination furnace to promote decarbonation of the cement clinker raw material, a clinker cooler to cool the cement clinker, a kiln exhaust-gas discharge passages to discharge an exhaust gas generated in the rotary kiln, a combustion-supporting gas supply device to supply a combustion-supporting gas having a higher oxygen concentration than air, a combustion-supporting gas supply passage to guide the combustion-supporting gas to the calcination furnace, and a calcination furnace exhaust-gas discharge passage to discharge a carbon dioxide gas-containing exhaust gas generated in the calcination furnace.

A method of establishing a furnace atmosphere in a directly heated heat treatment furnace is provided. A heat treatment furnace has at least one burner which is operated with a fuel gas and an oxygenous gas that are combusted to give a combustion gas. The combustion gas has a defined composition having a defined partial water vapor pressure. Hydrogen is used in the fuel gas with a proportion of at least 10% by volume. The heat treatment furnace is additionally flooded with a water vapor-free and/or hydrogen-free gas, as a result of which the water vapor-free and/or hydrogen-free gas mixes with the combustion gas so as to bring about a partial water vapor pressure of the mixture in the furnace atmosphere of the heat treatment furnace that is less than the defined partial water vapor pressure of the combustion gas.

A method of establishing a furnace atmosphere in a directly heated heat treatment furnace is provided. A heat treatment furnace has at least one burner which is operated with a fuel gas and an oxygenous gas that are combusted to give a combustion gas. The combustion gas has a defined composition having a defined partial water vapor pressure. Hydrogen is used in the fuel gas with a proportion of at least 10% by volume. The heat treatment furnace is additionally flooded with a water vapor-free and/or hydrogen-free gas, as a result of which the water vapor-free and/or hydrogen-free gas mixes with the combustion gas so as to bring about a partial water vapor pressure of the mixture in the furnace atmosphere of the heat treatment furnace that is less than the defined partial water vapor pressure of the combustion gas.