JPS58150706A - Blast burner - Google Patents

Abstract

PURPOSE:To achieve a stable combustion and compactness in construction, by providing a burner tip such an improvement as that a secondary air may be favorably mixed with a combustible gas, and adequately fed to a combustion section, while allowing a circulation flow to prevent a lift back of flame. CONSTITUTION:A gas drawing force is generated by a primary air upon it being injected out of an air nozzle 22, whereby delivering a combustible gas into a venturi mixing tube 20 out of a gas nozzle 23. A air-gas mixture reaches a burner top via a diffusion screen 25, and wherein the mixture impinges against a ceiling plate 50 and is circulated in a circumferential direction. Thereafter the mixture is injected radially from a gas outlet 43 and ignited for forming a flame. On the other hand, a secondary air which flows through a secondary air tube 12 impinges against a baffle plate 64 and is diffused in a secondary air flow space 61, and is subsequently delivered radially out of a secondary air outlet 62. An arrangement is also provided such that the secondary air is continuously fed to a lower part of flame, thereby suppressing a poor combustion result and development of CO which deficiency of fresh air can cause. In addition, a thorough agitation of primary air with a combustible gas and a decelerated air-gas mixture by impinging and circulating movement can serve to prevent a lifting of flame.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plast burner used in hot water boilers and the like.

Plast burners, where all the combustion air is forcibly supplied by a fan, generally eject primary air into the mixing tube and supply secondary air to the combustion section, but in order to obtain good combustion, These include sufficient mixing of primary air and combustible gas, supply of sufficient secondary air to the combustion section, and prevention of flame lift and back.

In order to solve these problems, the structure tends to be complicated and large. The present invention aims to solve the above-mentioned problems by improving the burner top of the Plast Burner, and at the same time provides a Plast Burner that achieves miniaturization of the burner. explain.

In the illustrated embodiment, a vent pipe (20) is connected to a fan (not shown) for supplying pressurized air and fixed to the companion manifold (10) by opening a hole in the rear end surface (21)' of a small inner diameter. The rear end surface (21,) is provided with an air nozzle (22) that blows out pressurized primary air along the axis of the bench mixing tube (20), and the tip of the air nozzle (22) A gas nozzle (23) is provided on the side wall of the Venturi mixing tube (20) at a position C opposite to the spout (22a) from the lateral direction.The large inner diameter tip surface (24) of the Venturi mixing tube (20) Net (25)
' to create a disc-shaped mounting plate (3o).

A gas vent (31I'f'') opened on the mounting plate (30)
Matched and fixed. The mounting plate (3o) has a secondary air vent (32) in addition to the gas vent (31), and the secondary air vent (32) and the manifold (10)
A secondary air pipe (1) is connected between the secondary air hole (11) bored in the
2) is piped.

Next, to explain the entire structure of the burner top, it includes an inner cylindrical body (40) having a circular flange portion (41) k at its tip, and a disc-shaped ceiling plate placed on the front of the inner cylindrical body (40). (50)
This creates a gas flow space (42) and an annular gas discharge port (4
3), and a circular flat plate (44) and a circular flame hole dividing plate (45) are arranged alternately between the flange portion (41) and the peripheral end portion (51) of the ceiling plate. It is laminated,
The gas discharge port (43) is divided into a large number of small flame holes. An outer body (60) is coaxially provided on the outer periphery of the cylindrical body (40), and an inner cylindrical body (40) and an outer cylindrical body (60)
), a cylindrical secondary air flow space (61) and an annular secondary air outlet (62) are formed at the Yν end of the waste outlet (43).
) is provided. The rear end surface (46) of the cylindrical body (40)
) and the rear end surface (63) of the outer cylinder (60) are fixed to the mounting plate (30), and the rear end surface (63) of the inner cylinder (40) is fixed to the mounting plate (30).
46) is matched with the gas vent (31), and the inner cylinder body (
40) rear end surface (46) and rear end surface (6
3), the secondary air vent (32) is opened, and a buckle play (64) is provided protruding from the outlet side of the secondary air vent (32).

Since the present invention is configured as described above, the air nozzle (
Due to the suction energy generated by the jet of primary air ejected from the gas nozzle (23), the combustible gas is discharged into the pentieri mixing pipe (20), and the mixed gas (i) passes through the diffusion network (25) and reaches the burner top. Here, the mixed gas collides with the ceiling plate (50), diffuses, swirls in the circumferential direction, is discharged radially from the gas discharge port (43), is ignited, forms a deposit, and also flows into the secondary air pipe (12). , l' collides with the baffle play (64), diffuses into the secondary air flow space (61), and exits the secondary air outlet (62).
It is discharged radially from the

Characteristic effects of the present invention include the following points.

First of all? ! Since the air gas is discharged radially relative to the burner axis, the contact area with the air is larger than that of a gun-type flame, and secondary air is constantly supplied from the bottom of the flame base, so the combustion air This can suppress poor combustion due to insufficient combustion and the generation of CO that accompanies this.The mixed gas that flows into the burner top from the second V, Penchiley Mixture Blue (20) collides with the ceiling plate (50) and diffuses. However, the air and combustible gas are sufficiently stirred here, resulting in excellent mixing properties.

Since the mixed gas is decelerated by collision and swirling, lifting of the flame can be prevented.Fifth, the secondary air flow space (61)' flows into the secondary air flow space (61)' and flows out from the secondary air outlet (62). The next air is the flange part (41) that constitutes the flame mouth part.
It has the effect of cooling down the flame, and reduces the amount of flame caused by the flame becoming red hot.
It is possible to prevent burnout due to scratching phenomenon and abnormal heating.

Fourthly, apply the Plastburner of the present invention to the can body.

If installed vertically, the flame will be formed in a radial pattern, which will heat the bottom of the can evenly and close to the can, improving thermal efficiency. In this case, the ceiling plate (50) can prevent combustion condensate from falling into the burner top and causing corrosion.Fifth, the flat plate (44) and the flame hole partition plate (4
5) are stacked alternately to divide the gas discharge port (43) into a large number of small flame holes, and the input per port is set to be small, so combustion is fully stabilized and combustion noise is suppressed. When manufacturing the Plastburner of the present invention, there is a means for setting the flame hole load and increasing or decreasing the number of flat plates (44) and flame hole dividing plates (45) interposed between the gas discharge ports. As a result, a burner with several levels of combustion capacity can be obtained, so common parts can be used instead of manufacturing different models with different combustion capacities, making production management easy and reducing costs. be able to. An example of the design standard is as shown in the table below. Gas discharge port (43J.

Since the secondary air discharge port (62)' is provided in an annular shape, it has a flatter vcH compared to conventional products, and there is no need to provide a large diameter cylindrical body called a flame holding tube in the combustion part as in conventional products. It is manufactured in a small size and has practical effects such as fewer restrictions on the design dimensions of one device.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view. FIG. 2 is an exploded perspective view of the main parts. lO・・War manifold 20＠・・Pentier mixing tube 30・・Mounting plate 40・・・Inner cylinder body 42
・Wound/Gas flow space 43...Gas discharge port 44・
・・Flat plate 45 ・ Flame hole partition plate 50 ・ Ceiling plate 60 ・φO outer cylinder 61 ・・O secondary air flow space 62 ・ Secondary air discharge port

Claims (1)

[Claims] An inner cylindrical body (4) with a circular flange (41) at its tip.
0) and a disk-shaped ceiling plate (50) placed on the front side of the cylindrical body (, 10), a gas flow space (42) and an annular gas discharge port (43) are provided. Flange part (41
) and the peripheral edge of the ceiling plate (51).
) and circular flame hole partition plates (45) are stacked alternately to form the gas outlet (43) Jk area + mi L, , in front of the gas outlet (43).
A plasto burner comprising a cylindrical body (40), an external cylindrical air discharge port (62) coaxially provided on the outer periphery of the cylindrical body (10), and a metal fitting to form a burner top.