JP3007822B2 - Can body structure of multi-tube once-through boiler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-tube type once-through boiler having a rectangular parallelepiped can body for flowing combustion gas in a direction crossing a water pipe.

[0002]

2. Description of the Related Art In the case of a boiler in which a rectangular parallelepiped can is formed by water pipes connecting upper and lower headers, a burner is provided on one side of the can and a chimney is provided on a surface facing the burner surface. The burner and the chimney are connected so that the combustion gas flows in the longitudinal direction of the rectangular parallelepiped can body, so that the burner, the water pipe group, and the chimney are aligned. In addition, there is a problem that the length corresponding to the depth when the burner installation side is set to the front is extremely long.

[0003]

An object of the present invention is to reduce the length in the depth direction and reduce the installation area of a boiler having a rectangular parallelepiped can.

[0004]

The upper header and the lower header are arranged at the upper part and the lower face of the upper header and the lower header are opposed to each other in a rectangular shape. The water tube row connecting the header and the lower header is formed as a water pipe wall by closing the gap between each adjacent water pipe with fins, and the four sides of the rectangular parallelepiped space sandwiched by the upper and lower headers are also closed by the water pipe wall. An opening that penetrates the upper header of the portion upstream of the combustion gas flow is provided, a burner that forms a flame toward the can body is installed at the upper portion of the opening, and the upper pipe of the portion corresponding to the downstream of the combustion gas flow is provided. The opening also has an opening penetrating the upper header, a chimney for discharging combustion exhaust gas is connected to the opening, and a water pipe connecting the upper and lower headers between the upper and lower headers other than the two openings. Many are provided.

[0005]

The burner can be provided above the can body by providing an opening penetrating the upper header at a portion corresponding to the upstream side of the combustion gas, and a space for installing the burner which was necessary on the side of the can body is required. Disappears. By providing an opening that penetrates through the upper header in a portion corresponding to the downstream side of the combustion gas, the chimney can be provided above the can body, and the space for installing the chimney that was necessary on the side of the can body is not required. . Therefore, the space above the can body can be effectively used, the length in the depth direction is shortened, and the installation area can be reduced.

[0006]

An embodiment of the present invention will be described with reference to the drawings.
An upper header 1 is provided at an upper part, and a lower header 2 is provided at a lower part.
The opposing surfaces of the upper header 1 and the lower header 2 are rectangular, and a row of water tubes 7 provided on the peripheral portion of the opposing surface and connecting the upper header 1 and the lower header 2 has a gap between the adjacent water tubes 7. Fin 1
0 is closed, and a rectangular parallelepiped can is formed as a water pipe wall with four sides closed. A cylindrical burner opening 3 penetrating through the upper header 1 is provided in a portion of the upper header 1 adjacent to the water pipe wall on one side of the narrow water pipe wall. A burner 4 is provided for forming a flame toward the can body. A portion of the upper header 1 close to the water pipe wall facing the water pipe wall on the side where the burner opening 3 is provided has a cylindrical flue opening 5 penetrating the upper header 1.
Is provided, and a chimney 6 is connected to the flue opening 5 so that the combustion exhaust gas can be discharged. Upper header 1 other than the portion provided with burner opening 3 and flue opening 5
The lower header 2 is connected to the lower header 2 by a number of water pipes 7, and a water supply pipe 8 is connected to the lower header 2, and a steam extraction pipe 9 is connected to the upper header 1.

When the operation of the boiler is started, the combustion air and fuel sent to the burner 4 are injected from the burner 4 into the can, and a flame is formed in the can. The high-temperature combustion gas generated by the flame heats the water pipe 7 while flowing in a direction crossing the water pipe 7, is sent to the chimney 6 through the flue opening 5, and is discharged as combustion exhaust gas. The water sent from the water supply pipe 8 to the lower header 2 is heated in the water pipe 7 to generate steam because the water pipe 7 is heated, and the steam passes through the upper header 1 and the steam extraction pipe 9. Taken out.

[0008]

According to the present invention, the space above the can body can be effectively used, and it is not necessary to provide a burner or a chimney on the side surface. The area can be reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an embodiment according to the present invention.

FIG. 2 is a cross-sectional view of one embodiment according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper header 2 Lower header 3 Burner opening 4 Burner 5 Flue opening 6 Chimney 7 Water pipe 8 Water supply pipe 9 Steam extraction pipe 10 Fin

Claims (1)

(57) [Claims] An upper header and a lower header are disposed at an upper portion and a lower header at a lower portion. Opposing surfaces of the upper header and the lower header are rectangular, and an upper header and a lower tube provided on a peripheral portion of the facing surface. The water pipe row connecting the water pipes is made up of water pipe walls by closing the gaps between adjacent water pipes with fins, and the four side faces of the rectangular parallelepiped space sandwiched by the upper and lower water pipes are also closed by water pipe walls, An opening that penetrates the upper header of the upstream part of the gas flow is provided, and a burner that forms a flame toward the can body is installed at the top of the opening, and the upper header of the part that falls downstream of the combustion gas flow is also installed An opening penetrating the header is provided, and a chimney for discharging combustion exhaust gas is connected to the opening, and a large number of water pipes connecting the upper and lower headers are provided between the upper and lower headers other than the two openings. Multi-tube type once-through boiler can body structure.