JPS60202219A - Burner - Google Patents

Abstract

PURPOSE:To reduce production of NOX and to enable increasing of a throttle ratio because of a burner body being a Bunsen type, by a method wherein main burner ports are decreased in heat capacity of a wire net and the like, burner bodies each having a burner port load of 1kcal/hrmm.<2> or less are located in juxtaposition with each other, the one burner body is of a Bunsen 2-stage system, and the other burner body is of a total primary system. CONSTITUTION:Main burner ports 5 and 5' are decreased in heat capacity of a wire net and the like, and burner port, having a burner port load of 1kcal/hrmm.<2> or less, has burner bodies 6, 6', combustion chambers 7, 7', and secondary burner ports 8, 8'. The burner bodies 6 and 6' are located in juxtaposition with each other, and the burner body 6 is a Bunsen system having a primary air ratio of 100% or less and of a Bunsen 2-stage combustion system in which a primary flame and a secondary flame are formed at the main burner port 5 and a secondary burner port 8, respectively. Meanwhile, the burner body 6' is a total primary system burner having a primary air ratio of 100% or more, and of a system in which complete combustion is effected in the main burner 5'. In this constitution, 70% throttle is effected by the total primary system burner body, and 1/3-1/4 throttle is effected by the Bunsen system burner body, and this reduces a value of NOX to 10ppm or less and allows throttle of 1/5 or more.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a burner with a large aperture ratio for indoor open-type household combustors such as stoves and fan heaters.

Conventional structure and its problems ゛ Conventionally, in consideration of cleanliness such as low NOx, the burner of this type of indoor open type combustor has a burner body 2 having a full-scale wire mesh flame hole 1 as shown in Fig. 1. The mainstream is a configuration in which a plurality of . 3 indicates a fuel nozzle, and 4 indicates a combustion chamber. Figure 2 shows combustion amount and Co/CO2.

It shows N08 characteristics, but in Figure 1 it is 1500Kcal.
/hτ of two burners, in the case of an all-order burner, the Turn Down Ratio (hereinafter abbreviated as TDR) can only have a coefficient of 70, and as shown in the figure, only the ranges A and B can be Co/00m 0. Since the combustion range of 001 cannot be secured, it has the disadvantage that a linear aperture ratio and TDR performance cannot be achieved. Even if the No. 1 type is clean at 5 to 6 ppm or less, if the squeezing property is not good, there are disadvantages in terms of usability, such as the on/off process, which causes a lot of odor when igniting, and the fact that it cannot be squeezed to 1/3 or less, which goes against energy conservation. Ta. Also, although not shown in the diagram, the aperture ratio is 1/4 to 11 like the in-burner.
There are burners that can achieve 5.5, but there are also combustion methods that contain NOx of 30 ppm or more and have problems with cleanliness, and the reality is that there are no burners that are clean and have a large TDR.

OBJECTS OF THE INVENTION The present invention solves these conventional problems and aims to provide a burner with low NOx (high TDR).

Structure of the Invention In order to achieve this object, the present invention uses a wire mesh or the like for the main flame hole, and has a burner body with a small heat capacity and a flame hole load of 1 Kcal/hr or less, arranged in parallel, and Each burner device has a combustion chamber and a secondary flame hole is formed in the upper part of the combustion chamber, one of the main flame holes of the burner body is a Bunsen type burner body with a primary air ratio of 100 inches or less, and the other burner body has a combustion chamber. One side is configured to be a full-order type burner body with a primary air ratio of 100 inches or more, and with this configuration, the full-order type burner body performs a restriction of 70 inches, and the Bunsen type burner body performs 1/3 to 1/3 By restricting the aperture to 1/4, NOx is reduced to 10
It has the function of being a burner device that can reduce the aperture to 1/15 or more at ppm or less.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 3 and 4. The main flame holes 5 and 5 are made of wire mesh or the like with a small heat capacity and have a flame hole load of less than IKcai/h-, and have burner bodies 6 and 6, combustion chambers 7 and 7', and secondary flame holes 8 and 8, respectively. It is a Bunsen type burner with burner bodies 6 and 6, and the burner body 6 has a burner ratio of 100 or less, with the primary flame in the main flame hole 5 and the secondary flame in the secondary flame hole 8. This is the so-called Bunsen two-stage combustion method in which a secondary flame is formed. On the other hand, the burner body 6' is a full-order type burner with a primary air ratio of 100eI6 or more, and complete combustion occurs in the main flame hole 5'.

In the above configuration, the burner body 6 has a capacity of 2500Kcal/h.
r's Bunsen two-stage combustion system, 6' is 1500Kcal/
If we use the full-fire combustion method of hr, as shown in Figure 5,
3000 Kcal/hr ~600 Kcal/hr
Co up to the combustion range shown by C in the diagram up to TDR of 115 r.
/C02 (OOO1) allows for linear combustion and reduces Nox to 10 ppm or less.The Bunsen method also reduces the flame hole load to I
Kcal/hr- or less, the flame reaction temperature is low because the metal net is low, and the reaction temperature is lower due to the two-stage combustion.
20-30 ppm N compared to Kcal/hzd)
The configuration also reduces Ox. Since the burner body 6 is a Bunsen type, a TDR of 1/4 to 115 is possible and 2
500 Kcal/hr to 500-600 Kcal/
You can also see that you can narrow it down with hr i. However, the burner body 6' is approximately 1/2 in the 70 section of 1500 Kcal/hr.
3's 500 Kcal/hr I can't narrow it down to L, so I use a good combination of 6 and 6' to make T D R3000 Kcal
/hr ~600 Kcal/hr.

Effects of the Invention As described above, the burner of the present invention provides the following effects.

(1) The heat capacity of the main flame hole and wire mesh is small, and the flame hole load is reduced to I.
Burner bodies with Kcal/hr or less are installed side by side, and one burner body uses the Bunsen two-stage combustion method, and the other burner body uses the full-order method, so the flame hole load is small and the Bunsen two-stage and full-order combustion are performed. Because of this, it has low NOx, and because it is a Bunsen type, it can have a large aperture ratio, so it has the effect of becoming a high TDR burner.

(2) By achieving a high TDR, there is no on-off combustion caused by a rise in room temperature as in the conventional case, which has the effect of eliminating noise during on-off and odor during ignition.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of a conventional low No The perspective view and FIG. 5 are combustion characteristics diagrams of the same burner. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Ol000 21) 3000 Amount of incubation - Arc Figure 3 Pile Figure 4

Claims (1)

[Claims] A material with a small heat capacity such as a wire mesh is used for the main flame hole, the flame hole load of the main flame hole is set to I Kcal/hr or less, a plurality of burner bodies having the main flame hole are arranged in parallel, and each of the above-mentioned Each has a combustion chamber above the main flame hole, and a secondary flame hole is formed above the combustion chamber. Burna.