JPS6126721Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention relates to a double furnace structure boiler.

(b) Conventional technology Conventionally, there is a sectional boiler as one type of boiler.

Such a boiler is, for example, Utility Model No. 51-96101.
As described in the publication, the lower part has a substantially rectangular opening for forming a combustion chamber, the upper part has upper and lower openings for forming a flue and an opening for forming a steam or hot water communication path, and has a water storage section inside. The boiler body is constructed by polymerizing multiple pieces of the boiler with a certain thickness.
In the boiler body, a combustion chamber, a flue, and a steam or hot water communication path are sequentially formed from the bottom to the top, and one side of the combustion chamber is communicated with a fire pit.

(c) Problems that the invention aims to solve: However, in such a boiler, the combustion gas combusted in the combustion chamber flows directly into the flue through the combustion gas passage on the boiler component installed above the boiler. Sufficient combustion time could not be ensured, and only radiant heat transfer could be expected to the side surfaces of the combustion chamber, so it was not possible to improve combustion efficiency and heat exchange rate.

(d) Means for solving the problem In this invention, an inner furnace is formed in the combustion chamber of the boiler, a certain gap is provided between the combustion chamber wall and the outer wall of the inner furnace, and the air flow from the inner furnace is provided in the same gap. The boiler is configured to allow heat to pass through so that contact heat transfer occurs on the combustion chamber wall, increasing thermal efficiency.Moreover, the boiler itself is constructed by polymerizing boiler component pieces of a certain thickness, allowing the volume of the boiler itself to be changed. In line with this, the inner furnace itself can be assembled into inner furnace component pieces of a certain thickness, and the size of the inner furnace can be increased or decreased as needed according to the size of the combustion chamber, allowing for flexible construction. It is an object of the present invention to provide a boiler with a double furnace structure that allows the combination of the combustion chamber and inner furnace of the boiler.

(e) Examples This invention will be explained in detail based on examples shown in the drawings.

In Fig. 1, A indicates a boiler, and the boiler A has a substantially rectangular opening for forming a combustion chamber in the lower part, and openings for forming a flue and a steam or hot water communication path in the upper part. The boiler component A is constructed by assembling a required number of cast iron wheeler component pieces a provided with openings, and the boiler component pieces a have a constant thickness L and overlap each other to form the boiler A.

Reference numeral 1 denotes a combustion chamber formed when boiler component a as a section is assembled, and is formed in the lower half.

2 is a fire outlet, and 3 is a flue; the flue 3 is inserted above the combustion chamber 1, and partition flanges 4 are provided on both left and right sides and on the bottom side, so that the combustion gas detours and reaches the flue 3. That's what I do. 5 is a combustion gas path from the combustion chamber 1 to the flue 3. Reference numeral 6 denotes a water section communication port provided below the combustion chamber 1, and the inside of the boiler component a as each section is hollow and a water storage section 8 is provided.
The water storage section 8 is connected to a water section communication port 6 and a steam or hot water communication port 7, respectively.

The gist of this invention is that in a cast iron boiler with such a configuration, the inner furnace B is housed in the combustion chamber 1, and the inner furnace B is formed by polymerization with the inner furnace constituent piece b as a section. Yes, and will be explained in detail below.

That is, the inner furnace B can be constructed by stacking a required number of cast iron inner furnace constituent pieces b having a constant thickness and consisting of rectangular annular bodies, and can form a combustion space inside.

Further, the number of sections can be increased or decreased depending on the size of the combustion chamber 1, so that it can be used in a manner that is compatible with the combustion chamber of any cast iron boiler, and can also be housed in an existing cast iron boiler.

The inner furnace B assembled from the inner furnace constituent pieces b as sections has notches provided on both sides of the lower half of the inner furnace B to form the combustion gas flow holes 9 as vertically elongated holes.

Further, a certain vertical gap S is formed between the outer circumferential surface of the inner furnace B and the inner circumferential wall surface of the combustion chamber 1,
The gap S forms a flow passage through which the combustion gas in the inner furnace B is discharged from the combustion gas distribution hole 9, and in the gap S, the combustion gas flows along the inner wall surface of the combustion chamber 1. Therefore, contact heat transfer will occur to the wall surface.

In the figure, 1 indicates the thickness of the inner furnace component b.

M indicates a flow path through which combustion gas passes.

The embodiment of this invention is constructed as described above, and to explain its operation, first, the required number of inner furnace component pieces b are stacked in the front and back direction to match the size of the combustion chamber 1 of the boiler A. Inner furnace B
If the inner furnace B is housed in the combustion chamber 1 and fuel is combusted in the combustion chamber B, the combustion gas will flow from the combustion gas distribution hole 9 of the inner furnace B into the gap S, From the gap S, the combustion gas passes through the combustion gas passage 5, reaches the flue 3, and is discharged. When passing through the gap S, the combustion gas contacts the inner wall surface of the combustion chamber 1 and conducts heat through contact with the same wall surface, resulting in combustion. This heats the chamber 1 and the water in the water storage section 8.

(F) Effects With the configuration described above, the present invention has the following effects.

An inner furnace is installed inside the combustion chamber, a combustion space is formed within the inner furnace, and heavy oil fuel is combusted in the inner furnace, so the fuel can be completely combusted and CO gas can be produced. This can improve combustion efficiency.

It also assists in the combustion of low-oxygen gases, etc.

The complete combustion gas from the inner furnace is not sent directly to the flue, but instead is sent to the vertical gap formed between the inside of the combustion chamber and the outside of the inner furnace through a large number of combustion gas distribution holes. The combustion chamber 1
It can flow along the inner wall surface of the combustion chamber, and the temperature inside the combustion chamber is heated not only by radiant heat transfer but also by contact heat transfer, so the temperature distribution in the combustion chamber is uniform and the absorption efficiency of radiant heat is improved. It is possible to improve the heat exchange rate. In addition, in actual measurements of combustion efficiency, the efficiency increased by more than 5%.

The inner furnace housed in the combustion chamber is assembled and configured so that it can be increased or decreased by the inner furnace component parts, so that the inner furnace adapted to the size of the boiler can be housed in the combustion chamber, and it can be manufactured at low cost.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view of a dual structure boiler according to the present invention. FIG. 2 is a sectional view taken along the line of FIG. 1. A: Boiler, B: Inner furnace, a: Boiler component, b: Inner furnace component, S: Vertical gap, 1: Combustion chamber, 2: Outlet, 3: Flue, 4: Flange, 5:
Combustion gas path, 6: Water connection port, 7: Steam connection port,
8: Water storage part, 9: Combustion gas distribution hole.

Claims (1)

[Scope of Claim for Utility Model Registration] The lower part has a substantially rectangular opening for forming a combustion chamber, the upper part has upper and lower openings for forming a flue and an opening for forming a steam or hot water communication path, and has a water storage section 8 inside. A boiler is constructed by polymerizing a plurality of boiler component pieces a having a constant thickness, and a combustion chamber 1, a flue 3, and a steam or hot water communication passage 7 are formed in the boiler in order from the bottom to the top, and , in a boiler in which one side of the combustion chamber 1 is communicated with the fire outlet 2, an inner furnace B is housed in the combustion chamber 1, and the inner furnace B is constructed by superposing a required number of inner furnace component pieces b, each of which is an annular body having a constant thickness. A combustion space is formed inside the inner furnace B, and a combustion gas flow passage 9 is formed by cutting out both edges of the lower side wall of each inner furnace component b.
Accordingly, the vertical gap S formed between the combustion space of the inner furnace B and the outer surface of the inner furnace B and the inner surface of the combustion chamber 1
A double furnace structure boiler characterized in that the vertical gap S is communicated with the flue 3 via the combustion gas passage 5.