Method and apparatus for burning gaseous or liquid fuels
A fuel and burner technology, which is applied in the direction of gas fuel burners, combustion methods, combustion equipment, etc., can solve the problems that the high local thermal stress of the combustion chamber components cannot be prevented, and the temperature gradient cannot be solved.
Active Publication Date: 2021-10-29
METSO OUTOTEC (FINLAND) OY
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Problems solved by technology
[0007] However, these solutions described do not protect the combustion chamber components from high localized thermal stresses
Also, these literatures do not address the fundamental effects of temperature gradients, but merely attempt to avoid high temperature hotspots that can lead to high NOx emissions
Method used
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Embodiment Construction
[0045] figure 1 A typical design of a pellet roaster according to the prior art, in particular an iron ore pellet roaster, is shown. A burner assembly 1 according to the prior art (eg US 2016 / 0201904 A1) is shown in section.
[0046] The burner assembly 1 has a combustion chamber 2 which is cylindrical with a cross-sectional diameter D and therefore symmetrical about its center line a. The combustion chamber 2 serves as a flame reaction space.
[0047] exist figure 1 On the left side, the combustion chamber 2 leads to the furnace 3. On the other side, the burner lance 4 is positioned at position o. Such as figure 1 Shown according to the known situation of the prior art, the position o lies on the center line a, resulting in the distance |d 1 |Equal to 0.
[0048] The furnace 3 is designed such that two burner assemblies in opposite positions are used, indicated by the plane of symmetry b.
[0049] Via a burner lance 4 , a liquid or gaseous fuel and a primary oxidant, ...
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The invention relates to a method and related apparatus for combusting gaseous or liquid fuels in a combustion chamber having a hydraulic diameter D. Fuel and primary oxidant are introduced into the combustion chamber through the burner lance, and the fuel and primary oxidant have a certain average velocity u at the entrance of the burner lance into the combustion chamber 1 , and the secondary oxidant travels through the downdraft at an average velocity u 2 introduced into the combustion chamber. The burner lance is arranged at a position p such that the position p has a distance |d defined as the minimum distance between p and the combustion chamber centerline a 1 |, the distance from the position p to the intersection point i of the intersection area S of the combustion chamber and the downdraft and the centerline of the downdraft|d 1 |less than the distance from the intersection point of the shortest line between p and the center line a of the combustion chamber and the center line of the combustion chamber to the intersection point i of the intersection area S between the combustion chamber and the downdraft and the centerline c of the downdraft|d c |.
Description
technical field [0001] The present invention relates to a method for burning gaseous fuel or liquid fuel in a combustion chamber and its corresponding burner assembly. or liquid fuel and primary oxidizer at an average velocity u 1 introduced into the combustion chamber. Background technique [0002] The secondary oxidant is transported via the downdraft at an average velocity u 2 introduced into the combustion chamber. Certain industrial processes, such as the heating of charge in associated furnaces, rely on the heat generated by the combustion of fuel and oxidant. The fuel is usually natural gas or oil. The oxidizing agent is usually air, polluted air, oxygen or oxygen-enriched air. The burner assembly used generally has a combustion chamber with at least one burner lance for the introduction of a gaseous or liquid fuel and a primary oxidant; optionally also with a secondary oxidant supply, e.g. for secondary air descending airway. According to the prior art, the co...
Claims
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IPC IPC(8): F23D14/22F23D99/00
CPCF23C2900/06041F23D14/22F23D91/02F23C2900/03005F23D14/24
Inventor R·马杜塔M·施特勒德A·穆恩科
Owner METSO OUTOTEC (FINLAND) OY