TWI454567B - Cinder chute at burners to the protection of down-flowing cinder - Google Patents

Description

Burner slag chute for preventing slag flowing downward

SUMMARY OF THE INVENTION The present invention is directed to a slag chute on a burner or burner cavity for preventing downward flow of slag which is subjected to vaporization of a ash-containing fuel which is cracked into fine particles in a vaporizer.

When such a fuel is vaporized, the slag adheres to the furnace wall and flows in the direction of gravity, possibly at least partially blocking the outlet of the burner. Such slag is produced, for example, by a fluffy vaporization process of ash-containing fuel, which is cracked into fine particles, for example, a dusty fuel (<0.5 mm) such as coal, petroleum-based coke, bio-waste or biomass fuel, or mist. The vaporization process of liquid fuels, such as petroleum, asphalt, refining residues, and the like, is carried out by an oxygenation vaporizer, pressurized, and at a temperature above the melting point.

In order to protect the burner cavity, a pipe projecting from the pipe wall is disclosed in the German patent document DE 36 13 508 A1, in which cooling water flows in between and a curved bend is formed above the burner outlet. The refractory lining is at least partially laid on the curved elbow, but is not completely surrounded by the refractory material to avoid overheating of the bottom of the tube. The slag film flowing downward is only slightly separated from the burner port in the vaporizer, and it is not effective and cannot completely prevent the slag.

A similar solution is disclosed in the patent document WO 2008/119753 A1, which has the same disadvantages as described above.

A further disadvantage of the conventional solution is that the oxygen flowing out of the combustion chamber can be directed to change direction towards the wall shell, so that the impacted wall shell is damaged by a very hot flame (>2000 ° C). This results in a complete failure of the system with circulating water flow as a protective cover, particularly in the prior art, when there is any damage to the protective cover, there will be system failure. Even the conventional guidance of slag changing direction does not help, especially when a large amount of slag is present. In the prior art, there is neither sharp slag cracking edge nor sufficient reversal.

The object of the present invention is therefore to provide a proper protection of the burner outlet and the burner cavity to avoid clogging by the slag.

This object of the present invention is achieved in the slag chute of the foregoing type in that the slag chute is formed by a plurality of arc-shaped curved tubes through which the refrigerant flows, and after assembly, forms a vaporized interior facing the vaporizer and faces the vaporizer wall. Tilting, and in the area of the chute and the area above the direction of gravity of the burner cavity, the chute faces the combustion chamber wall shell at a substantially sharp angle.

This design provides a cooled slag chute that ensures proper slag steering to the combustion chamber opening even if a large amount of slag emerges.

Other designs of the invention are described in the dependent claims.

In the present invention, the curved elbow constituting the slag chute may be constituted by a pipe section whose inlet and outlet penetrate the vaporizer wall casing and are connected to the vaporizer in a gastight manner.

This structure can provide a slag chute with its own cooling cycle, which can withstand very high temperatures and will not be damaged. Even if damage occurs, the vaporizer wall shell is not damaged, and the slag chute can be separated and extended without affecting other structures.

The present invention also contemplates that the curved elbow forming the slag chute is composed of a cooling pipe section of the vaporizer wall casing, and the cooling pipe section is bent, turned, and bent back to the wall surface of the vaporizer in the vaporizer, and at least the composition may be formed therebetween. The tube section of the slag chute is partially bent to the vaporizer wall shell and bent back to the vaporizer wall surface.

Another embodiment of the invention consists in that the curved elbow forming the slag chute is formed by a portion of the burner nozzle and slides into the interior of the combustion chamber at an appropriate ratio. The portion of the burner nozzle that slides into the air chamber directly constitutes a slag chute that is slag that is slid down by the wall of the combustion chamber.

The present invention also provides that the curved elbow forming the slag chute is preferably subjected to a bolting method and a refractory lining.

As described at the beginning of this specification, it is advantageous that the curved bend of the slag chute is provided with a proprietary refrigerant inflow and refrigerant outflow, which is also the design in the present invention. Another design consists in that the curved elbow of the slag chute is integrated in the cooling cycle of the burner nozzle or, depending on the configuration, the curved elbow of the slag chute is integrated in the cooling cycle of the carburetor.

A burner 2 is disposed on the wall casing 1 of one of the vaporizers not shown in detail, and is located inside the burner nozzle generally represented by numeral 3. The combustion chamber wall casing 1 has a cooling pipe 4 on which a refractory lining 5 is laid. The burner mouth 3 also has a tube 6 for cooling the burner nozzle and, if necessary, as part of the vaporizer line.

Above the direction of gravity of the burner opening represented by 7 is the slag chute of the present invention, generally indicated at 8, and consists of a cooling tube 9, which is also surrounded by a refractory lining 5.

In the embodiment shown in Fig. 1, the slag chute 8 is located approximately above the burner opening 7, and in the embodiment of Fig. 2, it is directly on the line of the burner nozzle 3 line. The inflow and outflow of the refrigerant are represented by 10 in Figs. 1 and 2, and the element is mounted in a gastight manner on the combustion chamber wall casing 14, which is not further illustrated in the drawings.

As can be seen in Figure 2, the burner opening 7 can of course be laid with a refractory lining 5'. The slag chute 8 can also be part of the burner nozzle, and a portion of the burner nozzle slides into the combustion chamber of the carburetor, so that the leading edge of the burner nozzle substantially constitutes the first three arc-shaped cooling bends, and then directly constitutes the slag chute. .

As can be seen from Fig. 3, neither the vaporizer wall shell 1 nor the slag chute 8 has a refractory lining. In this embodiment, the slag chute 8 is constructed by the tube 9 in a single curved manner. A further potential is not depicted, i.e., a dedicated cooling cycle is provided to the slag chute 8 or it is coupled to the line of the burner nozzle 3.

Another embodiment of the slag chute 8 is shown in Figures 5 and 6, mainly in that the cooling line of the vaporizer wall casing 1 is designed to be properly curved. In Figure 5, the individual pipe road signs are numbered to illustrate the pipe trend. The numbers 1 to 6 are selected in the figure, which are not the same as the above figures in this specification, and are only the indications of the cooling pipes in Figures 5 and 6.

It can be seen that the cooling tube of the vaporizer wall housing indicated by numeral 2 extends to the edge of the burner opening 7, which is represented by the numeral 2' in Fig. 5. The tube 2 is then bent upward at an oblique angle and continues to extend in an arc across the opening 7. As can be seen from Fig. 5, the tube "2" on the left forms a half arc, and the tube on the right in the upper view "2" Form a half arc to the right. Then, after the tube "2" is bent back to the vaporizer wall casing 1, from then to the outside and down, the shovel again extends in the vaporizer wall casing 1.

Through the special bending of the tube 2, between the curved elbows, as represented by the numeral 2a in Fig. 5, the gap formed is formed by a cooling tube of another vaporizer wall shell that fits the curve to fill the gap, which is 5 is represented by the number 3. The line surrounding the burner opening 7 is looped back, leaving the vaporizer wall shell, surrounding the burner opening 7, and back to the vaporizer wall casing 1.

It will be apparent that many variations of the described embodiments of the invention are within the scope of the basic concepts of the invention. Thus, the present invention is not limited to a defined arcuate elbow constituting the slag chute, nor is it limited to the number of arcuate bends constituting the slag chute, and the like.

1. . . Wall shell (vaporizer)

2. . . burner

3. . . Burner nozzle

4. . . Cooling tube

5. . . Refractory lining

6. . . Pipeline

7. . . Burner opening

8. . . Slag chute

9. . . Cooling tube slag chute

10. . . Refrigerant--flowing---outflow

Further features, details and advantages of the invention will be described in the following description.

Figure 1 is a schematic cross-sectional view showing the cutting of a vaporizer wall shell having a burner nozzle and a slag chute of the present invention,

Figure 2 is a schematic cross-sectional view similar to Figure 1 showing another embodiment of the slag chute,

Figure 3 is a view seen in the direction of arrow III in Figure 1.

Figure 4 is a view seen in the direction of arrow IV in Figure 3,

Figure 5 is another modified embodiment of the slag chute of the present invention, showing a top view of a vaporizer wall shell, and

Figure 6 is a side view showing the view in Figure 5 as seen from arrow VI.

1. . . Wall shell (vaporizer)

2. . . burner

3. . . Burner nozzle

4. . . Cooling tube

5. . . Refractory lining

6. . . Pipeline

7. . . Burner opening

8. . . Slag chute

9. . . Cooling tube slag chute

Claims (9)

A slag chute on a burner or burner cavity for preventing downward flow of slag, which occurs in a vaporizer during the vaporization of a fine ash-containing fuel in a vaporizer, characterized by: slag chute (8) A curved elbow (9) through which a plurality of refrigerant flows, the arcuate elbow forming a guard groove surface in the region above the direction of gravity of the burner (2) and the burner cavity (7) after assembly The guard groove faces the inside of the vaporizer, tilts the vaporizer wall shell (1), and forms a substantially sharp angle (α) to the burner wall shell (1). The slag chute as described in claim 1, wherein the curved elbow (9) constituting the slag chute (8) is composed of a single pipe section, and both the inlet and the exit (10) pass through the vaporizer wall casing (1) And connected to the vaporizer wall shell (1) in an oxygen-tight manner. The slag chute according to claim 1, wherein the curved elbow (9) constituting the slag chute (8) is composed of a cooling pipe section of the vaporizer wall casing (1), and the cooling pipe section is regionally folded in the vaporizer chamber. Bend, turn and fold back to the wall surface of the vaporizer chamber. The slag chute as described in claim 3, wherein at least some of the elbow regions constituting the slag chute (8) are partially bent behind the vaporizer wall shell (1) and bent back to the vaporizer wall surface. The slag chute as described in claim 1, wherein the curved elbow (9) constituting the slag chute (8) is composed of a part of the burner nozzle, and the curved elbow slides into the combustion chamber at an appropriate ratio unit. For example, the slag chute described in the first aspect of the patent application, wherein the curved elbow (9) constituting the slag chute (8) is subjected to a bolt welding method and a refractory lining. For example, the slag chute described in claim 1 of the patent scope, wherein the curved elbow (9) of the slag chute (8) is provided with a dedicated refrigerant inflow and outflow. The slag chute as described in claim 1, wherein the curved elbow (9) of the slag chute (8) is integrated in the refrigerant circulation of the burner nozzle. The slag chute as described in claim 1, wherein the curved elbow (9) of the slag chute (8) is integrated in the refrigerant circulation of the vaporizer.