An environment control system utilizes oxygen and humidity control devices that are coupled with an enclosure to independently control the oxygen concentration and the humidity level within the enclosure. An oxygen depletion device may be an oxygen depletion electrolyzer cell that reacts with oxygen within the cell and produces water through electrochemical reactions. A desiccating device may be g, a dehumidification electrolyzer cell, a desiccator, a membrane desiccator or a condenser. A controller may control the amount of voltage and/or current provided to the oxygen depletion electrolyzer cell and therefore the rate of oxygen reduction and may control the amount of voltage and/or current provided to the dehumidification electrolyzer cell and therefore the rate of humidity reduction. The oxygen level may be determined by the measurement of voltage and a limiting current of the oxygen depletion electrolyzer cell. The enclosure may be a food or artifact enclosure.

A complex malodor removing equipment includes: a neutralizing module which dissolves a portion of malodor-causing substances, in malodorous gas introduced from malodor-producing equipment, in liquid water and removes same, which includes an acidity neutralizing module that introduces an alkaline substance from outside and removes an acidic malodor-causing substance from the malodor-causing substances, and an alkaline neutralizing module that introduces an acidic substance from outside and removes an alkaline malodor-causing substance from the malodor-causing substances, and which connects the acidity neutralizing module and the alkaline neutralizing module; and a balancing module which dissolves the remainder of the malodor-causing substances, in the malodorous gas introduced from the neutralizing module, in water and removes same, which includes an oxidation balancing module that introduces an oxidizing agent from outside and balances the malodor-causing substances, and a reduction balancing module that introduces a reducing agent from outside and balances the malodor-causing substances.

The present disclosure relates to an electric roaster equipped with a dual air purification and circulation system, wherein a suction fan consists of a first suction fan and a second suction fan disposed at both sides of a lower space of a roaster main body with an oil receiver, which is disposed under oil discharge nozzles of a roasting plate, disposed therebetween, the first suction fan forms a first air circulation flow by sucking air containing oil vapor, smoke, heat and odor generated at the top of the roasting plate through the oil discharge nozzles and supplying the air back to the top of the roasting plate through first discharge holes of a heat protection plate, the second suction fan forms a second air circulation flow by sucking air containing oil vapor, smoke, heat and odor generated at the top of the roasting plate through the oil discharge nozzles and supplying the air back to the top of the roasting plate through second discharge holes of the heat protection plate, and the air containing oil vapor, smoke, heat and odor discharged from the oil discharge nozzles by the suction force of the first suction fan and the second suction fan is purified by contact with water stored in the oil receiver disposed under the oil discharge nozzles and then introduced into the first suction fan and the second suction fan.

A system for removing carbon dioxide from flow of gas having carbon dioxide including a venturi eductor configured to receive the flow of gas having carbon dioxide therein and a flow of an alkaline solution at a predetermined pH range. The venturi eductor is configured to introduce and mix the flow of gas having carbon dioxide therein into the flow of the alkaline solution to induce the transfer of the carbon dioxide into a carbonic acid solution and the subsequent conversion of the carbonic acid solution into a solution having metal carbonate therein. A reactor is coupled to the venturi eductor includes a volume of the alkaline solution and is configured to provide sufficient reaction time to augment the transfer of carbon dioxide into the carbonic acid solution and the subsequent conversion of the carbonic acid solution into a solution having metal carbonate therein and output a flow of treated gas having a majority of the carbon dioxide removed. A pump coupled to the reactor is configured to recycle the flow of alkaline solution from the reactor to the venturi eductor such that the venturi eductor introduces and mixes the flow of gas with the flow of the alkaline solution. An output is coupled to the reactor and is configured to output a flow of a solution having metal carbonate therein to minimize the formation of metal carbonate precipitate in the reactor. A pH adjustment subsystem is configured to maintain the pH of alkaline solution at the predetermined pH range.

The present invention relates to a process for taking up one or more nitrogen oxide(s) from a medium using at least one particulate magnesium ion-comprising material, a particulate magnesium ion-comprising material obtained by the process as well as an adsorbing material comprising said at least one particulate magnesium ion-comprising material and the use of at least one particulate magnesium ion-comprising material having a BET specific surface area as measured by the BET nitrogen method in the range from 4 to 400 m.sup.2/g for taking up one or more nitrogen oxide(s) from a gaseous and/or aero

Systems, devices and methods provide energy recover, modular systems to build and revise commercial kitchen services, closed circuit exhaust, and high efficiency capture and containment of fumes from cooking processes.

An exhaust hood may have an exhaust inlet; a shroud having a lower edge and being movable, the shroud being configured to define an enclosed space over and adjacent a cooking surface, the enclosed space being in communication with the exhaust inlet. The shroud is movable to a first position providing clearance between the cooking surface and the shroud lower edge and a second position providing substantially less than the clearance provided by the first position. A vertical jet at the lower edge is aimed upwardly and along an inside of the shroud when the shroud is in the second position and the vertical jet is in the enclosed space. A horizontal jet is provided at a top of the shroud and aimed along an inside of the shroud when the shroud is in the second position and the vertical jet being in the enclosed space.

An indoor smoker includes a cabinet including an exhaust duct, a smoking chamber, a firebox, and a bypass duct extending between the firebox and the exhaust duct. A damper is movable between a first position for closing the smoking chamber when a firebox temperature is outside a desired range and a second position for blocking the bypass duct when the firebox temperature is within the desired range. The damper thus regulates the flow of smoke such that only good smoke is directed into the smoking chamber, while bad smoke is routed directly to the exhaust duct.

An indoor smoker includes a cabinet including an exhaust duct, a smoking chamber, a firebox, and a bypass duct extending between the firebox and the exhaust duct. The indoor smoker further includes a system of dampers and check valves to regulate the flow of smoke and air within the indoor smoker. A controller may regulate these features to terminate a smoking process by asphyxiating the combustible material and evacuating the smoking chamber, to pause a process by evacuating the smoking chamber while permitting bleed air into the smoldering chamber, or to continue a normal smoking operation.

An indoor smoker includes a cabinet defining a discharge vent, a smoking chamber having a chamber outlet, and an exhaust assembly including an exhaust duct and a recirculation duct providing fluid communication between the chamber outlet and the discharge vent. An air handler urges a flow of smoke through a catalytic converter positioned within the exhaust duct to lower volatile organic compounds prior to discharging the smoke. A recirculation port may be defined between the recirculation duct and the exhaust duct upstream of the catalytic converter and a damper may direct the flow of smoke through the recirculation port when the smoke contains unacceptable levels of volatile organic compounds.