JPH01151004U

JPH01151004U -

Info

Publication number: JPH01151004U
Application number: JP4668688U
Authority: JP
Priority date: 1988-04-05
Filing date: 1988-04-05
Publication date: 1989-10-18

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す縦断面図、
第２図はその横断面図、第３図は第２図の要部拡
大横断面図、第４図はこの考案の別の実施例にお
ける要部拡大横断面図、第５図はこの考案の一実
施例における内方環状水管列の展開図、第６図は
この考案の別の実施例における内方環状管列の展
開図、第７図は水管の受熱量の推移を示すグラフ
、第８図は従来の伝熱面構造を示す横断面図であ
る。１……上部管寄せ、２……下部管寄せ、３……
内方の環状水管列、４……外方の環状水管列、５
……燃焼ガス通路、６……バーナ、７……燃焼室
、８……ボイラー外壁、９……燃焼室開口部、１
０……燃焼ガス通路開口部、１１……煙道、１２
……横ヒレ。 FIG. 1 is a longitudinal sectional view showing an embodiment of this invention.
Fig. 2 is a cross-sectional view of the same, Fig. 3 is an enlarged cross-sectional view of the main part of Fig. 2, Fig. 4 is an enlarged cross-sectional view of the main part of another embodiment of this invention, and Fig. 5 is an enlarged cross-sectional view of the main part of this invention. FIG. 6 is a developed view of the inner annular water tube row in one embodiment, FIG. 6 is a developed view of the inner annular water tube row in another embodiment of this invention, FIG. The figure is a cross-sectional view showing a conventional heat transfer surface structure. 1... Upper header, 2... Lower header, 3...
Inner annular water tube row, 4...Outer annular water tube row, 5
... Combustion gas passage, 6 ... Burner, 7 ... Combustion chamber, 8 ... Boiler outer wall, 9 ... Combustion chamber opening, 1
0... Combustion gas passage opening, 11... Flue, 12
...side fin.

Claims

[Scope of utility model registration request]

The annular upper header 1 and lower header 2 are connected by a large number of water pipes, and these water pipes are arranged in two rows of annular water pipe rows 3 and 4 with an interval in the radial direction. A combustion chamber 7 is formed in the inner and outer water tube rows 3 and 4, an annular combustion gas passage 5 is formed between the inner and outer water tube rows 3, a combustion chamber opening 9 communicating with the combustion gas passage 5 is provided in the inner water tube row 3, and a combustion chamber opening 9 that communicates with the combustion gas passage 5 is provided in the inner water tube row 3. The water tube row 4 on the other side is provided with a combustion gas passage opening 10 communicating with the flue 11, and flat horizontal fins 12 are arranged parallel to each other on the outer surface of the water tube on the side of the combustion gas passage 5 in the tube axis direction. In a multi-tube once-through boiler with a multi-stage configuration,
The effective total area of the horizontal fins arranged on the required number of water pipes located on the left and right sides of the combustion chamber opening 9 is the effective total area of the horizontal fins of the same number of water pipes at other locations connected to the predetermined number of water pipes. The heat transfer surface structure of a multi-tubular once-through boiler is characterized by its area being smaller than its surface area.