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burner

A burner and fuel technology, applied in the direction of burner, combustion type, flue gas combustion, etc., can solve the problems of increased emissions, flame front does not ensure uniform combustion, etc.

Active Publication Date: 2020-09-15
SOFINTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These burners of the prior art have several disadvantages: the flame front does not ensure uniform combustion and an excess of oxidizer must be used to ensure complete combustion of the supplied fuel
In fact it is well known that these flame stabilizers cause NO x increased emissions

Method used

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Examples

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example 1

[0105] The combustion process is like Figure 1a In accordance with the present invention and connected to the burner of an industrial refractory boiler. The burner is used at 100% (100% load) of its thermal power. The fuel supply is natural gas (about 95% methane, 2.5% ethane, 0.2% propane, 0.06% butane, 0.02% pentane + C 10 H 22 Mixture, 1.6% nitrogen, 0.7% CO 2 , H 2 O trace and H 2 S). The combustible material is atmospheric air at room temperature.

[0106] The air supply pressure is 12000 Pa. Gaseous fuel is supplied downstream of the injector 1 by the second fuel injection system 8. The fuel supply pressure is 250,000Pa.

[0107] The air excess is 1.5%. Calculated based on dry gas, the oxygen contained in the flue gas is 0.3% by volume. The temperature of the flue gas output from the boiler is 1320°C.

[0108] The volume ratio of recirculated flue gas / combustion aid is 45%. CO exhaust pipe emission ≤ 20 ppmv and NO x ≤15ppmv.

example 2

[0110] Example 1 is repeated, but the injection of natural gas is performed upstream of the injection section 1 through the first fuel injection system 5.

[0111] CO exhaust pipe emission ≤ 10 ppmv and NO x ≤10 ppmv.

example 4

[0118] The combustion process is carried out in a burner connected to an industrial boiler according to the present invention. The burner is used at 100% of its thermal power. Fuel oil with a nitrogen content of 0.2% by weight is used. The combustion aid used was the same as in Example 1.

[0119] The air supply pressure is 12000 Pa. Fuel is supplied by the first fuel injection system 5 upstream of the injection section 1. The fuel supply pressure is comprised between 10 and 15 bar (10000-15000 KPa). The air excess is 5%. The oxygen contained in the flue gas is 1% by volume in the dry gas. The temperature of the flue gas output from the boiler is 1250°C.

[0120] The volume ratio of recirculated flue gas / combustion aid is 42%. The exhaust pipe emission of CO is ≤40 ppmv and NO x It is ≤80ppmv.

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Abstract

A burner operating under flameless combustion, comprising a system for drawing recirculated flue gas directly from the combustion chamber by means of an injector (1) fed with oxidizer, located between recirculated flue gas and oxidizer A heat exchange system between, a system for injecting fuel directly into the recirculation flue gas, the latter with or without a combustor, wherein a fuel-recirculation flue is formed in the zone around the outlet of the combustor injector Gas-combustor mixture and then introduce this mixture into the combustion chamber.

Description

Technical field [0001] The invention relates to a burner for fuel and its working process. Background technique [0002] The burner is a device for generating heat for various industrial applications, such as an industrial boiler for generating steam or electric power, a melting furnace for metal melting, and the like. [0003] Combustion in the burner usually takes place through a flame, and liquid, solid or gaseous fuel is supplied by means of a suitable device, thereby obtaining controlled combustion. [0004] The existing flame burner is Figure 4 In schematic longitudinal section view Figure Shown in. in Figure Among them, 23 is the internal part of the combustor, 21 is the fuel injector or fuel injection nozzle, 22 is the flame stabilizer, 20 is the fuel supply nozzle, and 24 is the burner sheath. in Figure In the figure, the white arrows show the flow of combustion-supporting materials (usually air). The Figure Specifically, it is shown that the combustion-supporting str...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23L15/04F23C9/00F23C9/08F23D17/00
CPCF23L15/04F23C1/08F23C2201/301F23C2202/20F23C2900/09002F23C2900/99001F23C9/08Y02E20/34F23C9/00F23D17/002
Inventor L.莫兰蒂
Owner SOFINTER