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Oxygen fired boiler unit with three combustion zones and method of operation thereof

A technology of combustion area and furnace, which is applied in the direction of combustion method, combustion air/fuel supply, combustion type, etc., and can solve problems such as low efficiency and system degradation

Active Publication Date: 2018-08-14
GENERAL ELECTRIC TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such systems are prone to inefficiencies and system degradation

Method used

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  • Oxygen fired boiler unit with three combustion zones and method of operation thereof
  • Oxygen fired boiler unit with three combustion zones and method of operation thereof

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Embodiment Construction

[0013] The applicants have found that mixing oxygen to form a separate oxidant stream and subsequently feeding the separate oxidant stream to the boiler may affect system efficiency and degradation. For example, using a separate oxidant stream to feed oxygen to the boiler may result in inefficient use of oxygen and unstable combustion of the fuel. Furthermore, the use of a separate oxidant stream may result in damage to components, or require more expensive materials, such as piping for delivering the oxidant stream to boilers or heaters, since the oxygen concentration in the oxidant stream may require high concentrations, which may Contributes to the corrosion of metals in such components. The foregoing problems are addressed by a typical boiler design and method of operating a boiler disclosed herein for an oxygen-based system.

[0014] figure 1 A typical oxy-fired boiler unit is shown as part of a power production system which may include one or more boiler units. A boil...

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Abstract

The invention discloses an oxygen-fired boiler unit, which includes a burner (100) for burning fuel and for discharging flue gas produced by the combustion. The furnace has first (100a), second (100b) and third (100c) combustion zones and an air separation unit (106) for separating oxygen (118) from air and separating the separated A first portion (119) of the oxygen is supplied to the first oxidant stream (115), a second portion (120) is supplied to the second oxidant stream (117), and a third portion (121) of the separated oxygen is supplied to the combustion chamber. First (100a), second (100b) and third (100c) combustion zones of a furnace (100). The controller, together with the control valve and measuring unit, causes the separated oxygen (118) to be distributed so that the first (115) and second (117) oxygen streams have the desired oxygen content and the first (117) of the burner (100) The ( 100a ), second ( 100b ) and third ( 100c ) zones receive the required amount of oxygen based on combustion zone stoichiometry control. The flue gas oxygen content is determined in order to control the differential oxygen content and the amount of separated oxygen produced.

Description

[0001] Statement Regarding Federally Funded Research [0002] The US Government has rights in this invention under Grant under Contract No. DE-NT0005290 from US Department of Energy / National Energy Technology Laboratory (NETL). technical field [0003] The present disclosure relates to an oxy-fired boiler unit, an energy production system utilizing at least one such boiler unit, and a method of operation thereof. Background technique [0004] Boiler units for energy production systems have been used in coal-fired power plants, among others. This boiler unit takes air and sends it to a burner to burn coal to produce steam, which is then used to generate electricity. Boiler units for electricity production and other components of such systems are described in, for example, Patent Application Publication Nos. .6,505,567 is described. [0005] Oxygen was developed for carbon dioxide capture and sequestration in power plants burning fossil fuels (such as coal, etc.) to replace...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C6/04F23C9/00F23L7/00F23L15/00F23N5/00
CPCF23C6/045F23C9/003F23C2201/101F23C2202/30F23C2900/06041F23L7/007F23L15/00F23L2900/07001F23L2900/07005F23L2900/07006F23L2900/07007F23N5/006F23N2221/08F23N2237/26Y02E20/32Y02E20/34F23C6/04F23C7/008F23N3/00
Inventor X.娄J.张A.乔斯J.A.麦科姆贝A.A.勒瓦斯塞厄
Owner GENERAL ELECTRIC TECH GMBH