Title:
MULTITUBULAR ONCE-THROUGH BOILER
Document Type and Number:
Japanese Patent JP2015034687
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To prevent overheat of an upper portion of heat transfer tubes in a multitubular once-through boiler in which a water level is set in the middle way of the heat transfer tubes.SOLUTION: In a multitubular once-through boiler having a can body of a structure in which a number of heat transfer tubes 4 long in the vertical direction are annularly arranged, and a combustion chamber 6 disposed at a central part of an array of the heat transfer tubes annularly arranged, and further provided with a combustion device 5 at an upper portion in the combustion chamber to heat boiler water in the heat transfer tubes by combustion by the combustion device 5, the combustion device 5 has a cylindrical combustion portion having a number of small holes, a premixed gas is injected from the small holes to perform combustion on an outer surface of the cylindrical portion in the combustion portion, and the combustion portion has a truncated cone-shaped portion 9 of which a diameter is gradually thinned downward, and a cylindrical portion 8 disposed at a lower part of the truncated cone-shaped portion.
Inventors:
TAKASHIMA HIROSHI
KIKUCHI TAIKI
KIKUCHI TAIKI
Application Number:
JP2013166831A
Publication Date:
February 19, 2015
Filing Date:
August 09, 2013
Export Citation:
Assignee:
SAMSON CO LTD
International Classes:
F22B21/06; F23D14/02
Domestic Patent References:
| JPH01117403U | 1989-08-08 | |||
| JPH11141815A | 1999-05-28 | |||
| JP2006183927A | 2006-07-13 |
Foreign References:
| US6138457A | 2000-10-31 | |||
| WO2009008588A1 | 2009-01-15 |