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Thick and thin flame burner and combustion device

A flame combustion and rich flame technology, applied in the field of rich and thin flame burners, can solve the problems of uneven concentration supply and achieve the effect of simple structure

Active Publication Date: 2015-08-12
NORITZ CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, especially if Figure 18 It is considered that when the eccentric position of the discharge nozzle 105 is displaced in the left and right directions with respect to the mixing chamber 100 due to an assembly error, it is easy to cause a concentration on the left and right sides. Concentration (primary excess air ratio) and non-uniformity of the supply amount of the rich mixture supplied by the flame holes 103 and 103

Method used

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  • Thick and thin flame burner and combustion device
  • Thick and thin flame burner and combustion device
  • Thick and thin flame burner and combustion device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0045] like figure 2 As shown, each pair of three types of plate members 4, 4, 5, 5, 6, 6 and a pair of flame hole forming members 7, 7 are used to make the three types of each pair of plate members 4, 4, 5 , 5, 6, and 6 are joined to face each other in sequence as follows, thereby forming an example of the first embodiment of the rich-lean flame burner 3, and each of the three types of a pair of plate members 4, 4, 5, 5, 6 , 6 is made of sheet metal and processed into a predetermined shape by punching and bending. Such a rich-lean flame burner 3 is formed in a flat shape as a whole. if the image 3 The left-right direction in the is set to the longitudinal direction (front-back direction), and image 3 The direction perpendicular to the plane of the paper is set as the short-side direction (width direction), and the rich-lean flame burner 3 is formed so that one side ( image 3 left), the opening of the first supply port 31 is at the lower position, and the opening of th...

no. 2 Embodiment approach

[0059] Figure 11This is the third plate member 6a used in the rich-lean flame burner 3 of the second embodiment. The second embodiment differs from the first embodiment only in that a pair of third plate members 6 and 6 is integrated into a single piece instead of the pair of third plate members 6 and 6 used in the first embodiment. The other structure of the plate member (third plate member 6a) is completely the same as that described in the first embodiment. Therefore, in the following description, the said 3rd plate member 6a which differs from 1st Embodiment is mainly demonstrated, and the overlapping description of other structures is abbreviate|omitted.

[0060] The third plate member 6a of the present embodiment is formed by using a single plate member material in a state where the plate portions 65 and 65 are arranged line-symmetrically on both sides with the bending line T passing through the center. Each plate portion 65 is press-molded so as to have the same shap...

no. 3 Embodiment approach

[0064] Figure 13 FIG. 3 is a diagram showing a third embodiment in which a plurality of communication holes opened in the cylindrical portion 38 serving as a mixing chamber serving as a rich mixture gas and a rich mixture gas introduction passage are provided so as to provide a plurality of communication holes to serve as a cylindrical portion. The hole diameter of the communication hole is set so that the upstream side of the portion 38 on the side of the second supply port 32 has a large hole diameter and a small hole diameter on the downstream side. The structure other than that is the same as that of the first embodiment or the second embodiment. Therefore, the same reference numerals as those of the first embodiment are assigned to the structures shown in the drawings, and repeated detailed descriptions will be omitted. Explain the difference. in addition, Figure 13 The mesh part in the figure shows the joining part of the other 3rd plate member 6 or the plate member ...

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PUM

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Abstract

A row of rich-side flame holes of a combustion burner is arranged in center. Two rows of lean-side flame holes are arranged respectively on sides of the rich-side flame hole row. Two rows of rich-side flame holes are arranged respectively on the outsides of the two lean-side flame hole rows. Supply of lean-side mixture is provided to the lean-side flame hole rows from a tubular part. A lower end part of a central rich-side burner part is projected into a tubular part, into which the rich-side mixture is introduced, to establish lateral fluid communication, with its lower end edge placed in a state of non-contact with the inner surface of the tubular part. First communication holes in fluid communication with an internal space are opened in the lower end part. Communication holes in fluid communication with the outer rich-side flame holes are opened in the inside of the tubular part.

Description

technical field [0001] The present invention relates to a rich and thin flame burner with rich flame holes and thin flame holes. In particular, the present invention relates to a technique for uniformizing the concentration and supply amount of the rich air-fuel mixture supplied to the rich flame holes. Background technique [0002] Conventionally, various types of rich-lean flame burners have been proposed. In order to reduce NOx, a lean air-fuel mixture having an excess air ratio of more than 1 is burned in a thin flame hole, and in order to stabilize the combustion flame, a rich flame has been proposed. The hole is adjacent to the thin flame hole for combusting a rich mixture having an excess air ratio of less than 1 (for example, refer to Patent Documents 1 and 2). In particular, Patent Document 3 proposes a rich-lean flame burner in which, when fuel gas and air are supplied to a mixing chamber to be mixed to generate a rich mixture, a mixing promoting member such as a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23D14/08
CPCF23D2900/00003F23C6/02F23D14/586F23D2900/14641F23C2201/20F23D14/04F23D14/62F23D23/00
Inventor 秋山隆和田宪英若田武志栗山靖隆马越亮辅永井逸夫
Owner NORITZ CORP