Abstract:
A method is provided for managing an amount of energy utilized by a carbon dioxide capture system. The method includes providing a fuel and a feed stream to a combustion system. The feed stream includes oxygen and a portion of a flue gas stream generated upon combustion of the fuel. The method also includes subjecting the flue gas stream to a carbon dioxide capture system to remove carbon dioxide therefrom, measuring a concentration of oxygen present in the feed stream, and selectively adjusting an amount of the flue gas stream included in the feed stream based on the measured concentration of oxygen in the feed stream. The selective adjustment is performed such that the feed stream maintains an oxygen concentration in a range of between about 10% to 90% by volume and the carbon dioxide capture system operates at an energy load between 1.4 GJ/ton of carbon dioxide and 3.0 GJ/ton of carbon dioxide.
Abstract:
A method is provided for the automated setup of a metered combustion control system for controlling operation of a boiler combustion system. The automated setup process includes both commissioning and controller tuning, rather than tuning the carbon monoxide and/or oxygen trim controller after the commissioning process has been completed. The oxygen trim controller or the carbon monoxide trim controller is used to identify the air/fuel ratio.
Abstract:
An oxy-combustion boiler unit is disclosed which includes a furnace (100) for combusting fuel and for emitting flue gas resulting from combustion. The furnace has first (100a), second (100b) and third (100c) combustion zones, and an air separation unit (106) for separating oxygen gas (118) from air and providing a first portion (119) of the separated oxygen to a first oxidant flow (115), a second portion (120) to a second oxidant flow (117), and a third portion (121) of the separated oxygen gas to the first (100a), second (100b), and third (100c) combustion zones of the furnace (100). A controller together with control valves and measuring units cause the separated oxygen gas (118) to be distributed so that the first (115) and second (117) oxygen flows have a desired oxygen content, and so that the first (100a), second (100b), and third (100c) zones of the furnace (100) receive a desired amount of oxygen based on a combustion zone stoichiometry control. The flue gas oxygen content is determined in order to control the different oxygen contents and the amount of separated oxygen gas (118) produced.
Abstract:
A method of firing a burner into a furnace process chamber supplies the burner with fuel and combustion air at a ratio that provides a level of excess air. The method includes the steps of reducing the flow rate of combustion air, and maintaining the level of excess air when the flow rate of combustion air is being reduced. Other steps include withdrawing exhaust gas from the process chamber, and supplying the burner with the exhaust gas at an increasing flow rate when the flow rate of combustion air is being reduced.
Abstract:
L'invention concerne un procédé de contrôle du fonctionnement d'un brûleur assurant le chauffage des canaux de distribution de verre liquide issu d'un four verrier, ledit brûleur étant alimenté par un combustible et de l'oxygène, dans lequel un gaz additionnel est injecté en complément de l'oxygène de manière à ce que la somme du débit d'oxygène et du débit de gaz additionnel soit supérieur au débit minimal de refroidissement du brûleur D min .
Abstract:
The present invention includes four chambers (11) for containing refuse, a porous membrane (13) at least partially enclosing the chambers (11), and a housing (18) enclosing the porous membrane (13) and the chambers (11). Combustion fuel is supplied to the porous membrane so that surface combustion takes place at the surface of the porous membrane (13) facing the chamber (11) for burning the refuse contained in the chamber (11). Electrical means may also be employed to provide combustion of the refuse. Safety features include pressure feed-back means (32') for monitoring and regulating the pressure within the apparatus and temperature feed-back means (32') for monitoring and regulating the temperature within the apparatus.
Abstract:
For a plant comprising a gas/air separation unit (2) supplying a boiler (7) and a boiler-fed unit for compression and/or purification of C02 (16, 20), the quantity of fumes sent to the compression and/or purification unit is modified according to the sale price of the electricity generated and/or the cost of venting the fumes.