JPS60188750A - Hot-water boiler - Google Patents

Abstract

PURPOSE:To form the hot-water boiler, easy to assemble, without deteriorating heat efficiency, by a method wherein a combustion gas path, through which the combustion gas passes, is formed between a baffle body and an outer wall, provided outside a water-tube wall, and baffle plates are arranged in the combustion gas path. CONSTITUTION:A nozzle 6, communicated with a ventilating path 9, and an air injecting port 7 are penetrated through an insulating member 10 and the outer wall 12 so as to be opened in a combustion chamber 4. The baffle body 17, having a tubular configuration and whose upper and lower ends are opened, is supported by an exhaust port lid 19 through hanging fitments 18 so as to be located inside the water-tube wall consisting of water tubes 3. The combustion gas path 20 is formed between the insulating membmer 10 and the baffle body 17 and corrugated baffle plates 21 are arranged in the combustion gas path 20 between water tubes 3. According to this method, the high thermal efficiency of multi-tube type boiler may be maintained and man-hours for assembling may be shortened since the constitution thereof does not include welding between the water tubes and the baffle plates.

Description

[Detailed description of the invention] 4ζ11 river fields of “Industry” The present invention relates to a single flush boiler.

Structure of the conventional example and its problems The conventional RF+IF water boiler, as shown in Figs. , this water Qi'3 formed water Ii+,%. Water i; i<: The inside of the wall is the combustion chamber 4, and the nozzle/I/6 is located approximately in the center of the bottom plate 5.
An air blowout hole 7 was installed facing the combustion chamber 4, and a blowing passage 9 was installed on the lower surface of the bottom plate 5, which communicated with the air blowout hole 7 and a fan 8. A 1tli thermal insulation layer 10 is wrapped closely around the outer peripheral surfaces of the first header 1 and the second header 2, and a partition plate 11 is installed at the upper end of the first header 1.
A10, an outer wall 12 was installed on the outside of the partition plate 11, and an air loss hole 13 was installed on the upper circumferential surface of the heat insulating cover 10. Between the water pipes 3, on the inside, an inner buff (v14) facing -1- is fixed at its lower end to the second header 2, and on the outside, a downward-facing outer buff (v14) whose upper end is fixed to the first header 1 is fixed. 7 full 15 was stuck.

The high-temperature combustion gas 16 generated from the nozzle /l/6 collides with the partition plate 11 as shown by the arrow, then bounces off due to the opening force, passes from the combustion chamber 4 to one side of the water pipe 3, and flows between the water pipes 3. is introduced, descends between the inner and outer baffle plates 14 and 15, comes out from the bottom of the outer baffle v15, ascends between the outer baffle 15 and the insulation plate 10, and enters the υ1 pores 13 by 2J. + was given. Therefore, conventionally, the flow field of the combustion gas 16 is disturbed by making the combustion gas 16 meander downward, increasing the heat transfer coefficient, and further increasing the internal flow.

By using the outer baffle plates 14 and 15 as fins of the water tubes 3, the heat transfer area is increased and the thermal efficiency is improved. However, this vertical meandering configuration had the following problems.

(1) It is necessary to weld both ends of the inner and outer baffle plates 14 and 15 to the m walls of the water pipe 3, which requires a long welding length and increases the process time.

(2) Both inner and outer vasosol 14 and 15 1 + 111
Since all ends are fixed to the water pipe 3, the inner and outer buffs/I/41y, 14, 16 cannot freely expand thermally due to thermal stress and are easily deformed, making maintenance difficult. , (3)? The combustion gas 16 descends through a very narrow passage between the inner and outer pan full plates 14 and 15, and the combustion gas 16 rises at the outer buff/L'1501 section, causing a sudden change in direction, which increases the passage resistance. It gets bigger and requires a large fan 8.
become.

OBJECTS OF THE INVENTION The present invention solves these conventional problems, and aims to provide an inexpensive hot water boiler that is easy to assemble, reduces process costs, and does not reduce thermal efficiency. .

Structure of the Invention In order to achieve this object, the present invention forms a combustion gas path through which combustion gas passes between a panful body and an outer wall installed outside the water pipe wall, and a baffle plate is provided in this combustion gas path. is arranged.

Description of the embodiment: An embodiment of the present invention will be described below in Section 31, Section 1. This will be explained using FIG. The combustion chamber 4 is exposed through the nozzle 6 and the air jet hole 7, which communicate with the air blowing passage 9, through the heat insulating material 1o and the outer wall 12. Baffle body 17 in the shape of a middle cylinder with closed upper and lower ends
Alternatively, it is supported by the exhaust hole cover 19 via a hanging fitting 18 so as to be located inside the water pipe wall formed by the water pipe 3. A heat insulating material 10 is wrapped tightly around the outside of the water pipe wall formed by the outer peripheral surfaces of the first header 1 and the second header 2 and the water pipe 3, and an outer wall 12 is provided to support the heat insulating material 10. , forming a sealed structure. A combustion gas path 20 is formed between the heat insulating material 1o and the baffle body 17, and a corrugated baffle plate 21 is arranged in this combustion gas path 2o and between the water pipes 3. There is.

A middle cylinder 22 communicating with the air blowing passage 9 is provided approximately at the center of the bottom plate 6, and an auxiliary combustion cylinder 23 is provided on the same axis as the middle cylinder 22. outside of this middle cylinder 22)? A large number of secondary air ejection holes 24 are arranged on eight sides to eject secondary air in the same direction and in a tangential direction. In addition, the same month as in Figure 1 is shown on the same cloth.

(10) In the configuration described above, the liquid combustion sprayed from the nozzle V6 is vaporized in the auxiliary combustion tube 23 and combusted in the secondary air injection hole 24 to generate high-temperature combustion gas 16.

After this combustion gas 16 directly exchanges heat with the water pipe 3 without swirling, it enters the combustion gas path 20 formed between the heat insulating material 10 and the baffle body 17, collides with the baffle plate 21, and enters the water pipe 3.
It flows while exchanging heat. The combustion gas 16 flows quickly through a narrow combustion gas path and collides with the buff) V handler 21,
The more turbulent the flow, the higher the heat transfer, and as a result, a sufficient heat exchange rate can be obtained.

The panful plate 21 is resistant to deformation because it can freely thermally expand downward in response to thermal stress. In addition, the baffle body 17
By removing the AK upward, maintenance of the inside of the AK combustion chamber 4 can be easily performed.

Since the combustion gas passage 2o has a wider cross-sectional area and a shorter length than the conventional combustion gas passage 2o, the passage resistance is small and the fan can be small.

If a baffle plate 21 is provided between the water pipe 3 and the exhaust body 17, and between the water IHp; 3 and the heat insulating material 10, the thermal efficiency will be further improved.

Effects of the Invention As described above, the hot water boiler of the present invention in which the combustion gas path is formed by the baffle body and the outer wall, and the baffle plate is arranged between the water tubes, maintains the high thermal efficiency of the multi-tube type and has the following advantages: (1) Compared to the conventional example, since there is no welding between the water pipe and the baffle plate, the assembly process time can be shortened and the required cost can be saved, so an inexpensive hot water boiler can be provided.

Since the baffle plate is placed in the narrow combustion gas path, the combustion gas flows quickly and unturbulently into the water pipes, making it possible to obtain sufficient thermal efficiency.

(3) Because the baffle plate can freely expand thermally,
It is strong and has strong horns. By removing the baffle body, maintenance inside the combustion chamber can be easily performed.

(4) Since the ventilation resistance of the combustion gas path is smaller than that of the conventional example, a small fan can be used satisfactorily.

[Brief explanation of drawings]

1 is a vertical sectional view of a hot water boiler equipped with a conventional multi-tubular once-through heat exchanger, FIG. 2 1 is a sectional view taken along line AA' in FIG. 1, and FIG. FIG. 4 is a vertical sectional view of the hot water boiler according to the embodiment, and FIG. 4 is an enlarged perspective view of section B in FIG. 3. 1...First header, 2...Second header
iL"-13...Water pipe, 12...Outer wall, 17...Baffle body, 20...Combustion waste path, 21...Baffle plate Name of agent: Patent attorney Toshio Nakao and one other person (No. 1)
Figure 21-j Figure 3

Claims (1)

[Claims] The first header formed in an annular shape and the second header are connected by a large number of water pipes, a water pipe wall is formed by the large number of water pipes, and a baffle body in the shape of a hollow oil is provided inside the water pipe wall. An anchor or water boiler in which a combustion gas path through which combustion scum passes is formed between the water tube wall and an outer wall, and a baffle plate is installed in this combustion gas path.