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Flameless combustion device

A flameless combustion and combustion device technology, which is applied in combustion equipment, indirect carbon dioxide emission reduction, lighting and heating equipment, etc., and can solve the problems of increasing equipment costs

Active Publication Date: 2012-07-11
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The current flameless combustion device mainly uses preheated air, built-in stirring reactor, heat storage body or catalyst, etc., which will inevitably increase the cost of equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026]In this embodiment, the combustion device can be applied to a gas turbine. First supply air with a stoichiometric ratio, then open the igniter (2), inject fuel from the fuel nozzle (1), the liquid fuel is not lower than 1.0MPa, close the igniter (2) after ignition and retreat to the refractory coating In the layer (8), the air volume is slightly increased, the first air (A1) entrains the surrounding high-temperature gas and assists in the atomization of the fuel, which can stabilize the flame during ignition, and the oil-air mixture after ignition is driven by aerodynamic forces while burning , increase the volume of the fourth air (A4) at this time, the mixture of the reactant and the product flows back to the fuel inlet along the direction of the fourth air (A4) to dilute and mix with the new feed reactant and preheat it; The second air (A2) can reduce the temperature of the refractory coating (8) above the combustion chamber; the third air (A3) can control the residen...

Embodiment 2

[0031] In this embodiment, the combustion device can also be applied to industrial kilns, and the start-up, operation process, and shutdown are all the same as above; the height of the combustion chamber is increased according to the thickness of the calcined piece, and the height of the space below the partition (9) is kept constant. Increase the height of the space above the dividing plate (9), the vertical positions of the fuel nozzle (1), the second stream of air (A2) and the third stream of air (A3) are all constant relative to the upper wall (5); The flow field structure in the plane parallel to the vertical axis of the original combustion chamber is similar, so the internal width of the combustion chamber is extended several times, and the number of fuel nozzles (1) is doubled accordingly; the fourth air (A4) and the lower wall can be kept The vertical distance of (11) is constant, and the calcined part is horizontally placed in the reflux vortex (25) above the dividing ...

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PUM

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Abstract

The invention discloses a combustion device employing a flameless combustion technology. The device is suitable for liquid fuels. A combustion chamber comprises a front cover plate, a back cover plate, a front wall, a back wall, an upper wall, a lower wall, a separating plate, a refractory coating, a fuel nozzle, an igniter, an air inlet pipe I, an air inlet pipe II, an air inlet pipe III, and a heat-insulation layer. The combustion chamber is characterized in that the combustion chamber is rectangular; air is sprayed in with multiple whiffs; except A1, other 3 whiffs are sprayed by air inlet holes provided on the air inlet pipes arranged on different positions, such that an annular reflux composition is formed in the combustion chamber. Therefore, high-temperature flue gas reflux can be ejected, and a combustion process can be stabilized, such that a condition for stable and flameless combustion of the liquid flue is formed. The separating plate is horizontally arranged in the middle-lower part of the combustion chamber. An exhaust opening is arranged on the middle-lower position of the back cover plate. With the flameless combustion device, at a fuel-lean state approaching an equivalent weight, lean combustion with a small amount of flame can be formed; at a condition with a relatively high excessive air coefficient, flameless combustion can be formed, such that low NOx discharging can be maintained.

Description

technical field [0001] The invention belongs to the technical field of combustion equipment, in particular to a combustion device adopting a flameless combustion method. Background technique [0002] Burning fossil fuels to obtain heat and power has remained the main way of energy utilization for a long period of time. Improving combustion efficiency and reducing pollutant emissions have become one of the important research directions for energy utilization. Flameless combustion technology is known as one of the most promising combustion technologies in the new century because of its high efficiency and low pollution. This technology is expected to solve the pollution emission problems of various combustion equipment. [0003] Flameless combustion is a spatially distributed combustion mode in which reactants are diluted in a low-oxygen atmosphere. It is also called flameless oxidation (Flameless oxidation, Abbreviated as FLOX), soft combustion (Moderate&intense low oxygen d...

Claims

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Application Information

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IPC IPC(8): F23C7/00
CPCY02E20/34
Inventor 崔运静林其钊
Owner UNIV OF SCI & TECH OF CHINA