Burner for hydrogen generating device and hydrogen generating device containing it

Abstract

To provide a burner for a hydrogen generation system having an excellent combustion stability which can be achieved at low costs, and a hydrogen generation system having such a burner. A burner for hydrogen generation systems according to the present invention includes a combustion chamber that has a taper that enlarges in a flame radiation direction, and a distributor having an upper-stage gas injection ports for injecting utility gas and off-gas into the combustion chamber. Air injection ports are formed in the tapered side wall of the combustion chamber for injecting combustion air into the combustion chamber. The air injection ports are generally opposed to the upper-stage gas injection ports formed in the distributor.

Description

technical field [0001] The present invention relates to a combustor for a hydrogen generator of a fuel cell power generator that generates hydrogen from a raw material containing a compound consisting of at least carbon and hydrogen, and a hydrogen generator having the combustor generate electricity. Background technique [0002] As a first prior art related to a burner for a hydrogen generator of a fuel cell power generation device (hereinafter, simply referred to as a burner for a hydrogen generator), there is a circular burner with a flame hole on the outer peripheral wall and a combustion chamber inside. A cylindrical combustion head; and the first and second introduction pipes that respectively introduce high-calorie gas and low-calorie gas into the combustion chamber of the combustion head, and provide gases with different heats into the combustion chamber through a common flame hole , so that combustion can be performed (for example, refer to JP-A-2001-185186). In t...

AI Technical Summary

Problems solved by technology

Although it is not difficult to ensure the stability of combustion even if there is a slight change in the flow rate in the case of burning gases with a small difference in combustion velocity, if the gas with a large difference in combustion velocity is mixed as mentioned above, Mixing and burning, if the flow rate of the gas in the burner for the hydrogen generator changes, it is extremely difficult to ensure the stability of the combustion

[0007] In the case of the aforementioned first prior art, the flame is blown out due to an increase in the gas flow rate, so when the gas flow rate changes as described above, there is a so-called problem that stable combustion cannot be performed.

In addition, since the combustion area is limited to the narrow space in the cylindrical combustion chamber, if the combustion amount increases, there is a so-called problem that the flame temperature rises significantly and a large amount of nitrogen oxides are produced.

In addition, since the flame is burned in a narrow space, the shape of the flame changes unsteadily. As a result, there is a so-called problem of noise generated by the combustion.

[0008] In addition, in the case of the second prior art, although the so-called problems of blowing out of the flame and increase in the concentration of nitrogen oxides do not occur even if the gas flow rate increases, in order to achieve a structure in which the diameter of the combustion chamber changes stepwise, The so-called manufacturing process of welding multiple parts with different diameters is necessary, which has the problem of increasing the manufacturing cost.

For this reason, although it has the so-called excellent characteristics of high stable combustion, it is still difficult to use in practice

[0009] Also, in the burner of the third prior art, similar to the second prior art, although it is difficult to cause the problem of flame blowout, according to this technology, since only the gas and the combustion air are supplied separately The flame hole, so their mixing is insufficient, when the combustion load changes sharply, the flame goes out, etc., and the combustion stability is not enough

Images