JP2004257672A - Tubular flame burner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tubular flame burner allowing compact desulfurization, wherein gas containing fuel and oxygen is blown to the tangential direction of the inner peripheral face of a combustion chamber to form tubular flames. <P>SOLUTION: On a central portion of a tube axis at the rear end of the combustion chamber 10, a neutralizer blowing nozzle 13 is provided for blowing into the combustion chamber 10 a neutralizer which causes neutralizing reaction with SOx. The neutralizer blowing nozzle 13 has a spark plug 14 provided at the center, and the neutralizer is blown from a gap around the spark plug 14. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a tubular flame burner to be attached to a furnace or a combustor.
[0002]
[Prior art]
As a burner attached to a furnace or a combustor, it has a tubular combustion chamber called a tubular flame burner with an open end, and a nozzle that blows fuel gas near the closed end of the rear end of the combustion chamber and an oxygen-containing gas. There is known a burner in which a nozzle for blowing air is provided in a tangential direction of an inner peripheral surface of the combustion chamber (for example, see Patent Document 1).
[0003]
In this tubular flame burner, NOx and SPM (suspended particulate matter) are generated because the injected fuel gas and the oxygen-containing gas are uniformly mixed in a high-speed turbulent mixing state and pass through a continuous flame zone. This is a burner that can suppress the occurrence of odor.
[0004]
[Patent Document 1]
JP-A-11-281015 [0005]
[Problems to be solved by the invention]
It is disclosed that the tubular flame burner described in Patent Literature 1 can suppress the generation of NOx and SPM, but does not specifically describe the suppression of sulfur oxide (SOx) emission.
[0006]
Generally, there are wet desulfurization method and dry desulfurization method as methods for suppressing SOx emission.The former is a method of absorbing and recovering SOx by spraying an alkaline solution into flue gas, and the latter is by adsorption and absorption on a solid surface. This is a method for removing SOx.
[0007]
However, although the wet desulfurization method shows a high desulfurization rate, the temperature of the exhaust gas decreases and the rise of smoke from the chimney deteriorates.
[0008]
On the other hand, the dry desulfurization method does not require an afterburner due to a small decrease in temperature. However, in order to increase the desulfurization rate, the equipment becomes large and a regenerator is required.
[0009]
The present invention has been made in view of the above circumstances, and has as its object to provide a tubular flame burner to be attached to a furnace or the like, which can perform compact desulfurization.
[0010]
[Means for Solving the Problems]
In order to solve the above problems, the present invention has the following features.
[0011]
[1] A tubular combustion chamber having an open end, a fuel injection nozzle whose nozzle injection opening is open on the inner surface of the combustion chamber, and whose injection direction is substantially coincident with a tangential direction of a peripheral surface of the combustion chamber, and an oxygen-containing gas. A tubular flame burner provided with a blowing nozzle, further comprising a neutralizing material blowing nozzle for blowing a neutralizing material for neutralizing a sulfur oxide into the combustion chamber.
[0012]
[2] The tubular flame burner according to [1], wherein the neutralizing material injection nozzle is provided at a central portion of a tube axis at a rear end of the combustion chamber.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
One embodiment of the present invention is described below.
[0014]
FIG. 1 is a longitudinal sectional view showing a tubular flame burner according to one embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a tubular flame burner according to this embodiment, and a tip portion is attached to a furnace 2.
[0015]
The tubular flame burner 1 includes a tubular combustion chamber 10 having a tip open toward the inside of the furnace 2, a fuel injection nozzle 11 on an outer peripheral surface near a rear end of the combustion chamber 10, and an oxygen-containing gas injection nozzle 12. Have. A predetermined number of fuel injection nozzles 11 are arranged in the circumferential direction of the combustion chamber 10, the injection ports are opened on the inner surface of the combustion chamber 10, and the injection direction substantially matches the tangential direction of the inner circumferential surface of the combustion chamber 10. . A predetermined number of the oxygen-containing gas blowing nozzles 12 are also arranged in the circumferential direction of the combustion chamber 10, the injection ports are opened on the inner surface of the combustion chamber 10, and the injection direction substantially matches the tangential direction of the inner circumferential surface of the combustion chamber 10. I have.
[0016]
Note that gas fuel or liquid fuel is used as the fuel to be blown. The oxygen-containing gas refers to a gas that supplies oxygen for combustion, such as air, oxygen, oxygen-enriched air, and a mixed gas of oxygen and exhaust gas.
[0017]
A neutralizing material injection nozzle 13 for injecting a neutralizing material for causing a neutralization reaction with SOx into the combustion chamber 10 is provided at a central portion of the rear end of the combustion chamber 10. The neutralizing material blowing nozzle 13 has an ignition plug 14 provided at the center thereof, and the neutralizing material is blown from a gap around the ignition plug 14. When blowing the neutralizing material, the powdered neutralizing material is blown in an air stream, or an emulsion of the neutralizing material is blown with high-pressure water.
[0018]
When combustion is performed using the tubular flame burner having such a configuration, fuel is injected at a high speed from the fuel injection nozzle 11 in a tangential direction of the inner peripheral surface of the combustion chamber 10, and oxygen is injected from the oxygen-containing gas injection nozzle 12. The contained gas is blown at a high speed toward the tangential direction of the inner peripheral surface of the combustion chamber 10, and a swirling flow is formed while the fuel and the oxygen-containing gas are efficiently mixed in a region near the inner peripheral surface of the combustion chamber 10. It has become. When the swirling mixed gas is ignited by the ignition plug 14, a tubular flame is generated in the combustion chamber 10.
[0019]
Then, a neutralizing material that neutralizes with SOx from the neutralizing material blowing nozzle 13 provided at the center of the tube axis at the rear end of the combustion chamber 10 toward the center of the tubular flame formed in the combustion chamber 10 Is blown. As the neutralizing material, an alkaline material such as lime (CaO, Ca (OH) ₂ ) is used. As a result, the neutralizing material reacts with and polymerizes with SOx in the region of the tubular flame, thereby suppressing the generation of SOx.
[0020]
Furthermore, if a suitable swirl is applied during the injection of the neutralizing material, a more favorable reaction / polymerization of the neutralizing material and SOx becomes possible.
[0021]
Thus, in this embodiment, the neutralizing material blowing nozzle 13 is provided at the rear end of the combustion chamber 10 of the tubular flame burner, and the neutralization reaction with SOx is performed toward the tubular flame formed in the combustion chamber 10. Since the neutralizing material is blown, compact desulfurization can be performed.
[0022]
【The invention's effect】
Since the tubular flame burner of the present invention is provided with the neutralizing material injection nozzle for injecting the neutralizing material for causing a neutralization reaction with SOx, compact desulfurization can be performed.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a tubular flame burner according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tubular flame burner 2 Furnace 10 Combustion chamber 11 Fuel injection nozzle 12 Oxygen-containing gas injection nozzle 13 Neutralizing material injection nozzle 14 Ignition plug

Claims (2)

A tubular combustion chamber having an open end, a nozzle injection opening opening on the inner surface of the combustion chamber, and a fuel injection nozzle and an oxygen-containing gas injection nozzle whose injection direction substantially matches the tangential direction of the peripheral surface of the combustion chamber. A tubular flame burner provided with a neutralizing material blowing nozzle for blowing a neutralizing material for neutralizing a sulfur oxide into the combustion chamber. The tubular flame burner according to claim 1, wherein the neutralizing material injection nozzle is provided at a central portion of a tube axis at a rear end of the combustion chamber.

Images