Method and apparatus for starting up gasifying reactors operated with combustible dust
A technology of gasification reactor and powdered fuel, which is applied in the direction of granular/powdered fuel gasification, gasification process, manufacture of combustible gas, etc., to achieve the effect of avoiding adverse effects
Active Publication Date: 2015-03-18
西门子能源全球两合公司
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Problems solved by technology
Due to the very different flow characteristics of many pulverized fuels, even this method is only limitedly suitable for load control of high-power gasification reactors
[0007] No device is known from the prior art that enables the start-up of a gasification reactor for pulverized fuels in such a way that no pressure surge occurs due to the gas quantities released suddenly during start-up
Method used
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[0034] In order to illustrate the meanings of related terms and concepts, as they should be understood in the present invention, some following terms and concepts are defined below.
[0035] "Starting" of the gasification reactor is understood to start operation by igniting the burner. If all burners of the gasification reactor are firing, the start-up is ended and the gasification reactor works in normal operation.
[0036] The concept of "fuel charge" refers to the mass flow or volume flow of fuel, which may be gaseous, liquid and / or solid fuel converted by the gasification reactor. The burner of the gasification reactor must operate at a "minimum output velocity" at the burner outlet when ignited, which is in the range of 3 to 5 m / s to avoid flame backlash (flashback).
[0037]In a gasification reactor, a "synthesis gas" comprising carbon monoxide and hydrogen is obtained from the fuel employed, and the resulting synthesis gas is further utilized in downstream processing s...
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Abstract
The invention relates to a method for starting up a gasifying reactor comprising a plurality of burners. Each burner is thereby charged with combustible dust from a metering vessel (1) via a dense flow conveyor line (51, 52, 53, 54), which is assigned thereto, and with fuel gas via a gas conveyor line (62, 63), wherein a fuel mixture of combustible dust and combustible gas is provided prior to a moment of ignition of a burner, wherein a first composition of combustible dust and combustible gas, with which a first burner is charged for ignition, is regulated as a function of the fuel quantity, which was supplied to the second burner for ignition, after the ignition of a second burner, which is charged with a second composition of combustible dust and combustible gas for ignition, following the ignition of the first burner, so that the starting up of each of the plurality of burners of the gasifying reactor takes place under a regulated supply of the fuel load. The invention further relates to a gasifying reactor (7) for carrying out the method according to the invention.
Description
technical field [0001] The invention relates to a method and a device for starting a gasification reactor operated with pulverized fuel. Background technique [0002] It is known that gasification reactors with a high specific power, in particular above 200 MW, are equipped with a plurality of burners for supplying gasification medium and fuel, whether with gaseous, solid or liquid fuel. Here, the load is changed mainly by switching on or off a single burner arranged on top of the gasification reactor and within a defined range by means of A variable pressure differential regulation takes place with a variable fuel supply. [0003] The output velocity of pulverized fuel on the burner should not fall below a minimum of 3 to 5 m / s to avoid flame backlash (flashback). Therefore, during start-up of a high-power gasification reactor, considerable amounts of gas are released during ignition, which cannot be used up at once in the downstream processing stages and must therefore b...
Claims
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IPC IPC(8): C10J3/30C10J3/50
CPCC10J2200/152C10J3/30C10J3/50C10J3/723C10J2300/1223C10J2300/0933C10J3/726
Inventor O·斯库尔兹A·奥尔特拉普M·格特克B·穆勒R·格伦瓦尔德W·拉贝G·朔尔茨
Owner 西门子能源全球两合公司