JPH045845Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a gas partition plate for swirling combustion gas within an evaporator tube group of a marine auxiliary boiler or the like.

As shown in Fig. 1, conventional marine auxiliary boilers are generally equipped with a burner B at the front of the furnace A, and the combustion gas d is heat-absorbed in the furnace A and the rear evaporator tube group C, and then discharged to the outside of the boiler. It is becoming more and more like this.

Recently, especially as shown in Fig. 2, a burner b is installed on the ceiling of the furnace as an auxiliary boiler, and a partition plate f provided in the screen wall tube e and the evaporator tube group c is used to make the inside of the evaporator tube group c. A structure has been developed that makes effective use of the boiler heat transfer area by swirling the combustion gas.

However, such a partition plate f has a complicated structure, has many gas leaks, and has problems such as promoting vibration of the evaporator tube group.

The present invention was devised in order to solve these problems in the conventional technology, and is a novel structure that has a simple structure, does not cause gas leakage, and also has anti-vibration measures for the evaporator tube group. The purpose is to provide partition plates.

In order to achieve this purpose, the gas partition plate of the present invention: A plurality of comb-teeth plates are inserted in parallel at approximately the mid-height portion of the evaporator tube group and tightly fitted with each evaporator tube to provide vibration isolation for the evaporator tubes.
To reduce gas leakage, the joints of adjacent comb teeth plates should be wrapped. It is characterized by completely eliminating gas leakage by pouring a refractory material onto the upper surface of the comb-teeth plate, dividing the evaporator tube group into approximately halves vertically, and swirling the gas within the evaporator tube group.

The present invention will be described in detail below with reference to an illustrative embodiment.

FIG. 3 shows a plan view of the side comb-teeth plate 1, the upper comb-teeth plate 2, and the lower comb-teeth plate 3, which are the constituent members of the gas partition plate of the present invention.

As shown in FIG. 3A, the side comb tooth plate 1 has a straight line on one side and a comb-shaped notch 1a on the other side. The size of this notch 1a is determined by the size of the evaporation tube 10.
(see FIG. 4, which will be described later), and is deeper than a semicircle with a radius R, and the lateral distance P between adjacent evaporation tubes 10 is the same as the lateral distance P between the evaporation tubes 10. h ₁ is the distance from one side of the bottom of the notch 1a.

As shown in FIG. 3B, the upper comb tooth plate 2 has notches 2a symmetrically formed on both sides. and,
As mentioned above, this notch 2a is slightly larger than the diameter of the evaporation tube 10, but it is shallower than the semicircle with radius R, and the distance _h2 between each symmetrical notch 2a is equal to the vertical direction of the evaporation tube 10. The horizontal distance P between adjacent notches is the same as the horizontal distance P between the evaporation tubes 10. Further, a closing plate 4 having the same thickness as each of the comb teeth plates 1, 2, and 3 is attached to one end of the upper comb teeth plate 2.

The lower comb tooth plate 3 also has a
Notches 3a are symmetrically formed on both sides. As mentioned above, this notch 3a is slightly larger than the diameter of the evaporation tube 10, but deeper than the semicircle with radius R, and the horizontal distance P of the distance _h3 between each symmetrical notch 3a is Similarly to the above, the vertical and horizontal intervals of each evaporation tube 10 are the same.

In FIG. 4, the screen wall pipe 12
An attachment 8 is attached in a straight line to the evaporation tube 10 side of the evaporator tube 10, and attachments 9 are attached in a straight line horizontally or inclinedly to the water wall tubes 11 provided on both sides.

Then, the U bolt 6 is attached to the outermost evaporation tube 10.
A support plate 5 is attached with a nut 7, and the upper surface of this support member 5 and the attachments 8, 9 form one plane.

Next, a method of assembling the partition plate using each member configured in this way will be explained.

First, the water wall pipe 11 on the upper part of each member such as the support member 5 and the attachments 8 and 9 forming one plane as described above.
A side comb tooth plate 1 is placed on the side, a lower comb tooth plate 3 is arranged at every interval of the evaporation tube 10, and an upper comb tooth plate 2 is arranged at another interval.

Since the width of the lower comb tooth plate 3 is larger than the interval between the evaporation tubes, it can be wrapped with the upper comb tooth plate 2, and the outside can be welded only on one side of this lap. (See Figure 4, B).

Finally, by pouring refractory material (not shown) onto the flat surface of each comb tooth plate 1, 2, and 3, gas leaks are completely eliminated and the evaporation tube group is divided into upper and lower halves, allowing the gas to evaporate. A baffle plate or gas partition plate is formed which is rotated within the tube bank.

Note that the notches of each of the comb teeth plates 1, 2, and 3 may be made deeper than a semicircle so that the side edges overlap each other.

As described above, according to the gas partition plate of the present invention, a plurality of comb teeth plates are inserted in parallel at approximately the mid-height portion of the evaporator tube group and are closely fitted with each evaporator tube, thereby allowing the evaporation Can provide vibration isolation for pipes.

In addition, we made the joints of adjacent comb teeth plates overlap, that is, overlapped with each other at the non-notched portions of the semicircular strips, to reduce gas leakage, and in order to completely eliminate gas leaks, we By pouring refractory material, gas leaks can be eliminated, the evaporator tube group can be divided into upper and lower halves, and gas can be swirled within the evaporator tube group.

[Brief explanation of the drawing]

Figures 1 and 2 are schematic diagrams showing two examples of conventional marine auxiliary boilers; 4A is a partially cutaway plan view of the gas partition plate of the present invention, and FIG. 4B is a partially cutaway side view of the same gas partition plate. 1... Side comb tooth plate, 2... Upper comb tooth plate, 3...
Lower comb tooth plate, 4... Closing plate, 5... Support material, 6...
... U bolt, 7 ... Nut, 8, 9 ... Attachment, 10 ... Evaporation tube, 11 ... Water wall tube, 12
...Screen wall tube.

Claims (1)

[Scope of utility model registration request] A plurality of comb-tooth plates are inserted in parallel at approximately the mid-height portion of the evaporator tube group, semicircular notches are provided in the comb-tooth plates along the outer surface of the evaporator tubes, and the comb-tooth plates overlap each other at the portions without the notches. The comb-tooth plate is placed between the evaporator tubes, and a refractory material is poured onto the top surface of the comb-tooth plate to eliminate gas leaks and divide the evaporator tube group into upper and lower halves. A gas partition plate characterized by swirling gas.