JP3011142U - Vertical once-through boiler - Google Patents

Abstract

(57) [Summary] [Purpose] The object is to provide a vertical type once-through boiler that has good productivity in the manufacturing process and workability in assembly work, and that can save resources. [Structure] An open portion 2 of an outer tube body 1 having a substantially C-shaped cross section is arranged toward a flue 3, and an open portion 5 of an inner tube body 4 having the same cross section is directed to the back side of the outer tube body 1. , Are arranged concentrically and at appropriate intervals, and the upper ends of both pipes 1 and 4 are connected to an annular upper header 6 and a lower end to an annular lower header 7, respectively.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to the structure of a vertical once-through boiler.

[0002]

[Prior art]

 Conventionally, in a vertical once-through boiler, the inner and outer water pipe rows are welded and joined with a spacer or a fin, a groove is formed in the water pipe to be used as an annular water pipe wall, or there is a gap between the two inner and outer water pipes. Since it was surrounded by fins for blockage, and a large number of combustion gas passages with a substantially triangular cross section were formed in the circumferential direction, the manufacturing process took a long time, productivity was poor, and assembly work on site was troublesome. It has a drawback that it is difficult to work with. Moreover, since many water pipes are used, there was a problem to be improved in terms of resource saving.

[0003]

[Problems to be solved by the device]

 The present invention has been made in order to solve the drawbacks and problems described in the prior art, and aims to provide a vertical once-through boiler which has good productivity and assembling workability and can save resources. Is.

[0004]

[Means for Solving the Problems]

 The outer tube with an approximately C-shaped cross section is placed with the open part facing the flue, and the inner tube with the same cross-sectional shape is opened with the open part facing the back side of the outer tube, concentrically with appropriate intervals. The pipes are placed side by side, and the upper ends of both pipes are connected to the annular upper pipe header and the lower ends to the annular lower pipe header.

[0005]

[Action]

After the combustion gas heats the inner wall surface of the inner tube, it escapes from the open part to the back part of the outer tube, where it is divided into left and right, and while passing through the above-mentioned gap, the inner wall of the outer tube and the inner tube The outer wall surface of the is heated, passes through the open part of the outer tube to the flue, and is discharged.

[0006]

【Example】

 Referring to the drawings showing an example of an embodiment of the present invention, an open portion 2 of an outer tube body 1 having a substantially C-shaped cross section is arranged toward a flue 3, and an inner tube body 4 having the same cross section is arranged. The open portions 5 are arranged concentrically and at appropriate intervals toward the back side of the outer tubular body 1, and the upper ends of the two tubular bodies 1 and 4 are arranged in an annular upper pipe shifter 6 and the lower ends are formed in an annular lower pipe. Connect to group 7.

In the embodiment, the case where the wall surfaces of the inner and outer tubular bodies 1 and 4 are smooth has been shown, but the present invention is not limited to this, and in order to increase the surface area of the wall surface and improve the heat exchange efficiency. The surface can be freely wavy, diamond-shaped, sinusoidal, or the like.

Further, in the embodiment, an example of a cylindrical boiler is shown, but the shape is not limited to this, and it may be a polygon such as a hexagon or an octagon. In this case, of course, it is necessary to make the shapes of both pipes 1 and 4 into a C-shape composed of polygons to match the shape of the boiler. In FIG. 1, 8 indicates a combustion chamber, 9 indicates a refractory material, and arrows indicate a passage direction of combustion gas.

[0009]

【effect】

 Since the present invention is configured as described above, it has the following effects.

Rather than manufacturing and assembling a large number of tube groups as in the past, it is only necessary to manufacture the inner and outer tube bodies and connect them to the upper and lower tube headers, so productivity in the manufacturing process and work in the assembly process Significantly improved.

As compared with the conventional one, the material used can be saved, so that the resource can be saved. Naturally, the cost can be reduced. The present invention has the above effects, and its industrial utility value is remarkable.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the invention.

FIG. 2 is a sectional view taken along the line AA in FIG.

[Explanation of code number]

 1 Outer tube 2 Open part of outer tube 3 Flue 4 Inner tube 5 Open part of inner tube 6 Upper tube drawer 7 Lower tube drawer 8 Combustion chamber 9 Refractory material

Claims (1)

[Scope of utility model registration request] 1. An open section (2) of an outer tube (1) having a substantially C-shaped cross section is arranged toward a flue (3), and an inner tube (4) having the same cross section is formed in the open section. (5) is arranged concentrically and at appropriate intervals toward the back side of the outer tubular body (1), and the upper ends of both tubular bodies (1, 4) are placed in an annular upper tubular header (6). Vertical through-flow boiler characterized in that the lower end is connected to an annular lower header (7)