JPS5811303A - Multitubular type once-through boiler - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-tubular once-through boiler that prevents noise generation.

Conventional multi-tubular once-through boilers have had the problem of noise being generated from the chimney and the like. As a countermeasure, sound-absorbing material was installed inside the chimney, but this had the disadvantage of complicating the structure of the chimney.

FIG. 1 shows a conventional multi-tube once-through boiler, in which a can cover 7 is provided outside the 8 groups of water tubes, and a combustion gas passage 5 is formed between the 8 groups of water tubes and the can cover 7. ing. A heat insulating material 4 is provided on the outside of the can body cover 7.

A casing 8 is provided outside the heat insulating material 4. A combustion chamber 9 is formed inside the water layer 8 group.

The purpose of this invention is to provide a multi-tube once-through boiler with a simple structure that prevents the generation of noise, and in which a heat insulating material is provided on the outside of the water tube group. It is characterized by a can cover provided on the outside.

FIG. 2 shows an embodiment of the invention, in which an upper header 1 and a lower header 2 are connected by a large number of water pipes 3. This is a so-called multi-tubular once-through boiler. A heat insulating material 4 is provided outside the 8 groups of water tubes, and a combustion gas passage 5 is formed between the 3 groups of water tubes and the heat insulating material '4. The heat insulating material 4 is, for example, glass wool or the like, and has heat insulating and sound absorbing effects. It is desirable that the heat insulating material 4 is fixed using a punching plate 6 or the like. A can cover 7 is provided on the outside of the heat insulating material 4 to prevent combustion gas from leaking.

In the figure, 8 is a 2-sing provided on the outside of the can cover 7. A combustion chamber 9 is formed inside the 8 groups of water tubes. A combustion device 10 is provided inside the upper header l. If desired, this combustion device 10 can also be placed in a space formed inside the lower header 2.

Next, to explain the effects of this invention, the heat insulating material 4 is provided in the part that comes in contact with the combustion gas, and the heat insulating material 4 has a sound absorbing effect in addition to the heat insulating effect, so that the combustion noise generated in the combustion chamber 9 is reduced. The sound is absorbed by the heat insulating material 4, and almost no sound is emitted to the outside of the boiler.

As explained above, the present invention can provide a multi-tubular once-through boiler that prevents the generation of noise.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing a conventional multi-tubular once-through boiler, and FIG. 2 is a vertical sectional view showing an embodiment of the present invention. 1 is an upper header, 2 is a lower header, 8 is a water pipe, 4 is a heat insulator, 5 is a combustion gas passage, 6 is a punching plate, 7 is a can body cover, 8 is a casing, 9 is a combustion chamber, 10 is a combustion Device. Patent applicant: Miura Kogyo Co., Ltd. Representative: Tamotsu Miura Figure 1 Figure 2

Claims (1)

[Claims] In a multi-tube once-through boiler in which an upper header 1 and a lower header 2 are connected by a large number of water pipes 8, a heat insulating material 4 is provided outside the group of water pipes 8, and a combustion gas passage is created between the group of water pipes 8 and the heat insulating material 4. 5, a can cover 7 is provided on the outside of the heat insulating material 4, and a combustion chamber 9 is formed inside the group of 8 water tubes.