JPH1163414A - Radiant superheater structure of boiler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiant superheater structure of a boiler of which heat exchange area can be controlled easily, simple structured and the easiness of designing, producing and installing it can be improved. SOLUTION: An inlet header 3b and an outlet header 3c are arranged to the inside of a ceiling enclosure 1b covering the ceiling 1a of a boiler main body 1, a heat exchanger tube 3d of which base edge is connected to the inlet header 3b is pierced through the ceiling 1a, suspended inside the boiler main body 1, extended upward folding it in zigzag horizontally, the point edge of it is pierced through the ceiling 1a connecting to the outlet header 3c, a part of the heat exchanging tube 3d of which point edge is connected to an inlet header 3b is pierced through the ceiling 1a to be suspended to the position crossing the heat exchange tubes 3d as hanger tubes 3d' and extended upward merging with the zigzag heat exchanging tubes 3d and the edge of it is connected to the outlet header 3c through the ceiling 1a and the hanger tubes 3d suspends the heat exchange tubes 3d.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiant superheater for a boiler.

[0002]

2. Description of the Related Art FIG. 4 shows an example of a boiler, in which 1 is a boiler main body, 2 is a burner for injecting fuel into a boiler main body 1 for combustion, and 3 is a radiant superheater.
The fuel is injected from the burner 2 into the boiler main body 1 and burned, and the steam or water flowing in the radiant superheater 3 is heated using the radiant heat of the flame, and the combustion gas generated by the combustion of the fuel; Heat exchange is performed between steam or water flowing inside the plate superheater, the final superheater, the reheater, the primary superheater, and the economizer, not shown, and the superheated superheated steam is not shown. Leading to a steam turbine,
While the steam turbine is driven to drive the generator, the exhaust gas after heat exchange flows out to the exhaust gas duct 4.

The radiant superheater 3 is provided with an inlet manifold 3a extending in the width direction of the boiler main body 1 (a direction orthogonal to the plane of FIG. 4) at a required position on the front side of the boiler main body 1.
An inlet header 3b extending in the vertical direction is connected to the inlet manifold 3a, and an outlet header 3c extending in the front-rear direction of the boiler main body 1 is disposed in a ceiling enclosure 1b covering the ceiling 1a of the boiler main body 1. The heat transfer tube 3d whose base end is connected to the header 3b extends through the furnace wall 1c on the front side of the boiler main body 1 and extends upward in the boiler main body 1, and its tip penetrates the ceiling 1a of the boiler main body 1 to the outlet header 3c. It has a configuration that is connected.

The radiant superheater 3 shown in FIG. 4 is a radiant superheater of a type called a furnace upper division wall type, but other types include a suspended type as shown in FIG. There is also a radiant superheater 3 of the type called.

A radiant superheater 3 of a type referred to as the suspended type
As shown in FIG. 5, an inlet manifold 3a extending in the width direction of the boiler main body 1 is disposed in a ceiling enclosure 1b covering a ceiling 1a of the boiler main body 1, and the inlet manifold 3a
And an outlet header 3b extending in the front-rear direction of the boiler main body 1, and an outlet manifold 3e extending in the width direction of the boiler main body 1 in a ceiling enclosure 1b covering a ceiling 1a of the boiler main body 1. An outlet header 3c extending in the front-rear direction of the boiler main body 1 is provided on the outlet manifold 3e, and a heat transfer tube 3d having a base end connected to the inlet header 3b is connected to the boiler main body 1e. Through the ceiling 1a of the boiler main body 1, and the heat transfer tube 3d hung down in the boiler main body 1 is folded back and extended upward, and its tip penetrates through the ceiling 1a of the boiler main body 1 to the outlet header 3c. It has a configuration that is connected.

[0006]

In a radiant superheater 3 of a type called a furnace upper division wall type as shown in FIG. 4, it is attempted to adjust the heat transfer area to make the outlet superheated steam temperature a desired value. If you change the number of heat transfer tubes 3d,
Alternatively, there is no other method than changing the length of the heat transfer tubes 3d in the boiler main body 1, but it is almost impossible to change the number of the heat transfer tubes 3d. In order to change the heat transfer area, the positions of the inlet manifold 3a and the inlet header 3b must be changed accordingly, which has a drawback that the adjustment of the heat transfer area is extremely difficult in structure.

In the case of a radiant superheater 3 of a type called a suspension type as shown in FIG. 5, the heat transfer area can be adjusted relatively easily by changing the length of the heat transfer tube 3d. However, in addition to the inlet header 3b and the outlet header 3c, an inlet manifold 3a and an outlet manifold 3e are required, and the height levels of the inlet manifold 3a and the inlet header 3b and the outlet manifold 3e and the outlet header 3c are shifted. Need to be installed, the structure is complicated,
It had the drawback of poor manufacturing and installation.

The present invention has been made in view of the above circumstances, and has a radiant superheater structure for a boiler that can easily adjust a heat transfer area, has a simple structure, and can improve design, manufacture, and installation. It is something to offer.

[0009]

According to the present invention, an inlet header and an outlet header are arranged in a ceiling surrounding a ceiling of a boiler body, and a heat transfer tube having a base end connected to the inlet header is connected to the ceiling of the boiler body. And the heat transfer tubes suspended in the boiler main body are extended upward so as to be arranged in a zigzag manner in the horizontal direction, and the ends thereof penetrate the ceiling of the boiler main body, and the outlet header is formed. Connect to
A part of the heat transfer tube whose base end is connected to the inlet header penetrates the ceiling of the boiler main body and is hung as a hanger tube at a position intersecting with the zigzag heat transfer tube in the boiler main body, and A heat transfer tube as a hanger tube suspended in the boiler main body is extended upward so as to be arranged in a zigzag shape in the horizontal direction in such a manner as to merge with the heat transfer tube arranged in a zigzag shape, and the tip of the heat transfer tube is extended to the boiler main body. A radiant superheater structure for a boiler, characterized in that the ceiling is penetrated and connected to an outlet header, and the hanger tube supports the zigzag-shaped heat transfer tube.

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

When the heat transfer area is adjusted to make the outlet superheated steam temperature a desired value, the length of the heat transfer tubes arranged in a zigzag shape in the horizontal direction is changed by changing the number of zigzag scans. Since it is possible to easily change the position of the inlet header and the outlet header without changing the position, the adjustment of the heat transfer area becomes very easy, and structurally,
An inlet header and an outlet header may be simply provided in a ceiling surrounding the ceiling of the boiler main body, and the design, manufacture, and installation are improved.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show an embodiment of the present invention. In the drawings, the same reference numerals as those shown in FIGS. 4 and 5 denote the same parts. 1a, an entrance header 3b and an exit header 3c in a ceiling enclosure 1b.
Are disposed so as to extend in the width direction of the boiler main body 1, and a heat transfer tube 3 d whose base end is connected to the inlet header 3 b is made to penetrate through the ceiling 1 a of the boiler main body 1, and hang down into the boiler main body 1. The heat transfer tube 3d hung down in the boiler main body 1 is extended upward so as to be arranged in a zigzag manner in the horizontal direction, and its tip penetrates through the ceiling 1a of the boiler main body 1 and is connected to the outlet header 3c. Part of the heat transfer tube 3d whose base end is connected to 3b is connected to the ceiling 1a of the boiler main body 1.
As a hanger tube 3d ', which is hung as a hanger tube 3d' in the boiler body 1 at a position intersecting with the zigzag-shaped heat transfer tube 3d, and hung inside the boiler body 1 as a hanger tube 3d '. 3d is extended upward so as to be arranged in a zigzag shape in the horizontal direction in such a manner as to join the heat transfer tubes 3d arranged in a zigzag shape, and its tip is passed through the ceiling 1a of the boiler body 1 and connected to the outlet header 3c. Then, the heat transfer tube 3d arranged in a zigzag shape is supported by the hanger tube 3d 'to constitute the radiant superheater 3.

As shown in FIGS. 2 and 3, the hanger tubes 3d 'are formed in pairs, and one hanger tube 3d' is connected to the heat transfer tube 3d arranged in a zigzag manner in the horizontal direction. At the crossing position, the heat transfer tube 3d is bent to one side in the width direction of the boiler main body 1, and the other hanger tube 3d 'is positioned at a position crossing the heat transfer tube 3d arranged in a zigzag manner in the horizontal direction. A support bracket 5 is formed by bending the heat transfer tube 3d to the other side in the width direction of the boiler main body 1 and protruding from the hanger tubes 3d '.
On the other hand, the leg member 6 fixed to the lower surface of the heat transfer tube 3d is placed to support the heat transfer tube 3d.

The two hanger tubes 3d 'are
A leg member 8 fixed to the lower surface of the upper heat transfer tube 3d and a lower heat transfer tube 3d connected between the vertically adjacent heat transfer tubes 3d are connected by the connecting member 7.
A receiving member 9 fixed to the upper surface of the heat transfer tube is disposed, and the leg member 8 is placed on the receiving member 9 to prevent the heat transfer tube 3d from bending.

In the radiant superheater 3 configured as described above, when the heat transfer area is adjusted to make the outlet superheated steam temperature a desired value, the heat transfer tube 3d disposed in a zigzag shape in the horizontal direction is used. Since the length can be easily changed without changing the positions of the entrance header 3b and the exit header 3c by changing the number of scans in zigzag, the heat transfer area can be easily adjusted. In addition, structurally, the entrance header 3b and the exit header 3c may be simply disposed in the ceiling enclosure 1b that covers the ceiling 1a of the boiler main body 1, and the design, manufacture, and installation are improved.

Thus, the heat transfer area can be easily adjusted, the structure is simple, and the design, manufacture, and installation can be improved.

The structure of the radiant superheater of the boiler of the present invention is as follows.
It is needless to say that the present invention is not limited to the illustrated example described above, and various changes can be made without departing from the scope of the present invention.

[0019]

As described above, according to the radiant superheater structure of the boiler of the present invention, the heat transfer area can be easily adjusted, and the structure is simple, and the design, manufacture and installation are easy. An excellent effect that improvement can be achieved can be achieved.

[Brief description of the drawings]

FIG. 1 is an overall schematic configuration diagram of an example of an embodiment of the present invention.

FIG. 2 is an enlarged view of a portion II in FIG.

FIG. 3 is an enlarged perspective view of a part III in FIG. 2;

FIG. 4 is an overall schematic configuration diagram of a conventional example (furnace upper divided wall radiant superheater).

FIG. 5 is a perspective view of another conventional example (suspended radiant superheater).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Boiler main body 1a Ceiling 1b Ceiling enclosure 3 Radiant superheater 3b Inlet header 3c Outlet header 3d Heat transfer tube 3d 'Hanger tube

Claims (1)

[Claims] An inlet header and an outlet header are provided in a ceiling surrounding a ceiling of the boiler main body, and a heat transfer tube having a base end connected to the inlet header is passed through the ceiling of the boiler main body to enter the boiler main body. The heat transfer tubes, which are hung down and hung in the boiler body, are extended upward so as to be arranged in a zigzag manner in the horizontal direction, and the ends thereof penetrate through the ceiling of the boiler body and are connected to an outlet header. A part of the heat transfer tube whose base end is connected to is penetrated through the ceiling of the boiler body, and is hung as a hanger tube at a position intersecting with the heat transfer tube arranged in a zigzag shape in the boiler body, and inside the boiler body. A heat transfer tube as a hanger tube hanging downward is extended upward so as to be arranged in a zigzag manner in the horizontal direction in such a manner as to merge with the heat transfer tube arranged in a zigzag manner, and the end thereof is boiled. Radiant superheater structure of a boiler connected to the outlet header are passed through the ceiling, characterized in that allowed supporting the hanger heat transfer tubes are arranged in the zigzag to the tube body.