JP2003139309A - Burner for gasifying furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a burner for a gasifying furnace capable of elongating residence time in a gasifying furnace of injected fuel and improving gasification efficiency. SOLUTION: By obliquely arranging a spacer 10 interposed between an outer burner tip 8 and a slurry burner tip 9 at a required angle θ1 to a communicating direction of primary oxygen and obliquely arranging a spacer interposed between the slurry burner tip 9 and an oxygen burner tip 11 at a required angle to a communicating direction of fuel slurry, the primary oxygen and the fuel slurry are injected while swirling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gasifier burner.

[0002]

2. Description of the Related Art In general, as shown in FIG. 7, a coal gasification facility includes a gasification furnace 1 for partially oxidizing coal as a fuel with an oxidizing agent such as oxygen, and a gasification in the gasification furnace 1. The gas cooling device 2 for cooling the generated gas that has been turned into a gas and the gas refining device 3 for refining the generated gas cooled by the gas cooling device 2 are provided.

In the case of coal gasification equipment, as a method of supplying fuel to the gasification furnace 1, there are a wet method (supply of fuel slurry in which coal and water are mixed) and a dry method (air flow transfer of pulverized coal by carrier gas). However, FIG. 7 shows a wet type.

On the other hand, the gasification reaction of coal in the gasification furnace 1 is as follows: -water evaporation (only in the case of wet type, hardly occurs in the case of dry type) -vaporization of volatile matter

[Chemical 1] Coal → C _(S) + C _n H _m + O ₂・ Oxidation of volatile matter

Embedded image C _n H _m + (n + m / 4) O ₂ → nCO ₂ + m / 2H ₂ O

[Chemical Formula 3] C _(S) + 1 / 2O ₂ → CO CO + 1 / 2O ₂ → CO ₂ · Gasification reaction

[Chemical formula 4] C _(S) + CO ₂ → 2CO C _(S) + H ₂ O → CO + H ₂ C _(S) + 2H ₂ → CH ₄ · Gas phase equilibrium

[Chemical Formula 5] CO + H ₂ O = CO ₂ + H ₂ , and the coal is reacted with oxygen in the oxidizer at high temperature and high pressure to generate a fuel gas containing CO, H _{2 and the} like as main components (however, , C _(S) in the above reaction formula is solid carbon in char produced by removing volatile components from coal.).

During operation of the coal gasification equipment, the fuel slurry in which coal and water are mixed is supplied to the gasification furnace 1 and an oxidizing agent such as oxygen is supplied, and the fuel slurry is partially converted by the oxidizing agent in the gasification furnace 1. The generated gas that has been oxidized and gasified in the gasification furnace 1 is cooled in the gas cooling device 2, and the generated gas cooled in the gas cooling device 2 is purified in the gas purification device 3. The generated gas purified by the gas purification device 3 is guided to the gas turbine 4 and burned, and a generator (not shown) is driven by the drive of the gas turbine 4 to generate electricity and drive the gas turbine 4. The discharged exhaust gas is introduced into the exhaust heat recovery boiler 5, the heat of the exhaust gas is recovered in the exhaust heat recovery boiler 5, steam is generated from the feed water, and the steam turbine 6 is driven by the steam. To generate electricity by driving a generator (not shown), the exhaust gas after passing through the exhaust heat recovery boiler 5 is adapted to release from the stack 7 to the atmosphere.

In the gas cooling device 2, the generated gas gasified in the gasification furnace 1 is cooled by water supply, and the steam generated by heat recovery from the generated gas is recovered by the exhaust heat recovery. The steam generated in the boiler 5 is introduced into the steam turbine 6 together with the steam.

By the way, a burner for a gasification furnace is inserted and arranged in the gasification furnace 1. The burner for the gasification furnace is, for example, as shown in FIG. 8, a slurry in an outer burner chip 8. The burner tip 9 is concentrically arranged via a spacer 10, and the slurry burner tip 9
An oxygen burner tip 11 is concentrically arranged inside a spacer 12, and a primary oxygen oxidant is supplied to a primary oxygen flow path 13 between the outer burner tip 8 and the slurry burner tip 9. Oxygen and a slurry flow path 14 between the slurry burner tip 9 and the oxygen burner tip 11
Fuel slurry to be supplied to the oxygen burner tip 1
The secondary oxygen as an oxidant supplied to the secondary oxygen flow path 15 in 1 is injected into the gasification furnace 1 (see FIG. 7) to be mixed.

As shown in FIGS. 9, 10 and 11, the spacer 10 is formed so as to radially project from the outer peripheral surface of the slurry burner tip 9, and the spacer 12 is formed as shown in FIG. As shown in FIGS. 13 and 14, the oxygen burner tip 11 is formed so as to radially project from the outer peripheral surface.

[0009]

In the gasifier furnace burner as described above, the quality of the fuel spray greatly affects the gasification efficiency. However, as in the conventional case, the fuel slurry and the primary oxygen as the oxidizer are simply used. Injecting the secondary oxygen and the secondary oxygen into the gasification furnace 1 shortens the residence time of the fuel in the gasification furnace 1, while atomizing the atomized particle size of the fuel to generate primary oxygen and secondary oxygen as the oxidizer. It became difficult to promote mixing with secondary oxygen, and it was difficult to increase gasification efficiency.

In view of such circumstances, the present invention makes it possible to prolong the residence time of the injected fuel in the gasification furnace, while atomizing the atomized particle size of the fuel to produce primary oxygen and an oxidant. An object of the present invention is to provide a burner for a gasification furnace, which can promote mixing with secondary oxygen and can improve gasification efficiency.

[0011]

According to the present invention, a slurry burner tip is concentrically arranged via a spacer in an outer burner tip inserted and placed in a gasification furnace, and the slurry burner tip is provided in the slurry burner tip. Oxygen burner chips are arranged concentrically via a spacer, primary oxygen supplied to the primary oxygen flow path between the outer burner chip and the slurry burner chip, and the slurry burner chip and the oxygen burner chip. A burner for a gasification furnace for injecting into the gasification furnace a fuel slurry supplied to a slurry flow path between the fuel burner and the secondary oxygen supplied to the secondary oxygen flow path in the oxygen burner chip and mixing them. In, while the spacer interposed between the outer burner tip and the slurry burner tip is arranged to be inclined at a required angle with respect to the flow direction of the primary oxygen, the slurry By arranging a spacer interposed between the inner tip and the oxygen burner tip at a predetermined angle with respect to the flow direction of the fuel slurry, the primary oxygen and the fuel slurry are swirled and injected. The present invention relates to a gasification furnace burner.

In the gasifier burner, the spacers are arranged so as to be inclined so that the swirling directions of the primary oxygen and the fuel slurry are the same, or the spacers are arranged so that the swirling directions of the primary oxygen and the fuel slurry are opposite to each other. Can be tilted.

According to the above means, the following effects can be obtained.

When the spacers are arranged so as to be inclined so that the swirling directions of the primary oxygen and the fuel slurry are the same, the primary oxygen and the fuel slurry are injected as swirling flows in the same direction by the spacers, which is the same as in the conventional case. Unlike the case of simply injecting the fuel slurry and the primary oxygen and the secondary oxygen as the oxidizer into the gasification furnace, the residence time of the fuel in the gasification furnace becomes longer and the gasification efficiency can be improved. It will be possible.

Further, when the spacers are arranged so as to be inclined so that the swirling directions of the primary oxygen and the fuel slurry are opposite to each other, the primary oxygen and the fuel slurry are injected into a swirling flow in the opposite directions by the spacers, so that the fuel The atomized particle size is atomized to promote the mixing with the primary oxygen and the secondary oxygen serving as the oxidant, and the gasification efficiency can be increased.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 6 show an example of an embodiment for carrying out the present invention. In the drawings, the parts denoted by the same reference numerals as those in FIGS. 7 to 14 represent the same things, and the basic structure is 7 to 1
4 is similar to the conventional one, but the feature of this example is that the spacer 10 interposed between the outer burner tip 8 and the slurry burner tip 9 is shown in FIGS. Is the required angle θ _{1 with} respect to the primary oxygen flow direction.
And a spacer 12 which is inclinedly disposed between the slurry burner tip 9 and the oxygen burner tip 11.
Is inclined with respect to the flow direction of the fuel slurry at a required angle θ ₂ , so that the primary oxygen and the fuel slurry are swirled and injected.

In the illustrated example, the spacers 10 and 12 are arranged so that the primary oxygen and the fuel slurry rotate in the same direction.

The angles θ ₁ and θ ₂ are approximately 10
It can be appropriately selected within the range of about 30 ° to 30 °.

Next, the operation of the illustrated example will be described.

As described above, when the spacers 10 and 12 are inclined so that the swirling directions of the primary oxygen and the fuel slurry are the same, the primary oxygen and the fuel slurry are separated from each other by the spacers 10 and 12.
12 becomes a swirling flow in the same direction and is injected, which is different from the conventional injection of fuel slurry and primary oxygen and secondary oxygen as oxidants into the gasifier 1. The residence time of the fuel in the gasification furnace 1 becomes longer, and the gasification efficiency can be improved.

In this way, the residence time of the injected fuel in the gasification furnace 1 can be lengthened and the gasification efficiency can be improved.

Further, in the examples shown in FIGS. 1 to 6, the spacer 1 is arranged so that the swirling directions of the primary oxygen and the fuel slurry are the same.
Although 0 and 12 are arranged in an inclined manner, for example, the spacer 10 shown in FIGS. 1 to 3 is arranged in an inclined manner on the side symmetrical with respect to the axis of the slurry burner tip 9 or in FIGS. By arranging the spacers 12 shown in FIG. 6 so as to be inclined symmetrically with respect to the axis of the oxygen burner tip 11, the swirling directions of the primary oxygen and the fuel slurry can be opposite.

When the spacers 10 and 12 are inclined so that the swirling directions of the primary oxygen and the fuel slurry are opposite to each other, the primary oxygen and the fuel slurry are separated from each other by the spacers 10 and 12.
12 becomes a swirling flow in the opposite direction and is injected, atomizing the atomized particle size of the fuel, promoting mixing with primary oxygen and secondary oxygen as oxidants, and improving gasification efficiency. It will be possible.

Thus, the atomized particle size of the fuel can be atomized to promote the mixing with the primary oxygen and the secondary oxygen as the oxidant, and the gasification efficiency can be improved.

The burner for a gasification furnace of the present invention is not limited to the above-mentioned illustrated example, and it goes without saying that various changes can be made without departing from the scope of the present invention.

[0027]

As described above, the first aspect of the present invention is as described above.
According to the gasifier burner described in any one of 3 to 3, while the residence time of the injected fuel in the gasifier 1 can be lengthened, the atomized particle size of the fuel is atomized to obtain primary oxygen as an oxidizer. Further, it is possible to promote the mixing with secondary oxygen, and it is possible to exert an excellent effect that the gasification efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a side view of a slurry burner tip according to an example of an embodiment of the present invention.

FIG. 2 is a view taken along the line II-II of FIG.

FIG. 3 is a view on arrow III-III in FIG. 1.

FIG. 4 is a side view of an oxygen burner tip according to an example of an embodiment of the present invention.

5 is a view taken along the line VV of FIG.

6 is a VI-VI arrow view of FIG. 4. FIG.

FIG. 7 is an overall schematic configuration diagram showing an example of a coal gasification facility adopting a conventional wet coal feeding system.

FIG. 8 is a cross-sectional view showing an example of a conventional gasifier burner.

FIG. 9 is a side view of a slurry burner tip in an example of a conventional gasifier furnace burner.

10 is a view on arrow XX in FIG. 9. FIG.

11 is a view taken in the direction of arrows XI-XI in FIG.

FIG. 12 is a side view of an oxygen burner tip in an example of a conventional gasifier burner.

FIG. 13 is a view on arrow XIII-XIII in FIG.

FIG. 14 is a view on arrow XIV-XIV in FIG. 12;

[Explanation of symbols]

1 Gasification Furnace 8 Outer Burner Chip 9 Slurry Burner Chip 10 Spacer 11 Oxygen Burner Chip 12 Spacer 13 Primary Oxygen Flow Path 14 Slurry Flow Path 15 Secondary Oxygen Flow Path θ ₁ Angle θ ₂ Angle

Claims (3)

[Claims] 1. A slurry burner chip is concentrically arranged via a spacer in an outer burner chip inserted into a gasification furnace, and an oxygen burner chip is inserted in the slurry burner chip via a spacer. Primary oxygen supplied to the primary oxygen flow path between the outer burner chip and the slurry burner chip, and the slurry flow path between the slurry burner chip and the oxygen burner chip are arranged concentrically. In a burner for a gasification furnace for injecting and mixing a fuel slurry to be supplied and a secondary oxygen supplied to a secondary oxygen flow path in the oxygen burner chip, the outer burner chip and the slurry A spacer interposed between the burner tip and the slurry burner tip and the oxygen burner are arranged at a predetermined angle with respect to the primary oxygen flow direction. Gasification, characterized in that the primary oxygen and the fuel slurry are swirlingly injected by arranging a spacer interposed between the fuel and the fuel slant at a required angle with respect to the flow direction of the fuel slurry. Burner for furnace. 2. The gasifier burner according to claim 1, wherein the spacers are arranged so as to be inclined so that the swirling directions of the primary oxygen and the fuel slurry are the same. 3. The gasifier burner according to claim 1, wherein the spacers are arranged so as to be inclined so that the swirling directions of the primary oxygen and the fuel slurry are opposite to each other.