Liquid heaters and vaporizers – Indirectly heated – Separate fluid
Patent
1990-11-26
1991-12-03
Favors, Edward G.
Liquid heaters and vaporizers
Indirectly heated
Separate fluid
165161, F22B 102
Patent
active
050691694
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a heating apparatus or equipment for heating a reaction gas such as hydrogen and a fluid such as water to reaction, evaporation or predetermined temperature.
TECHNICAL BACKGROUND OF THE INVENTION
Conventionally, a heating equipment of this type utilizes radiant heat from flames obtained by combustion in one time and sensible heat of a combustion gas at a high temperature.
In such a conventional heating equipment, it raises the combustion temperature too high to control the temperature within permissible skin temperature of a heating pipe to utilize most of oxygen in the air for combustion. Thus, it has been impossible to suppress generation of pollution materials, viz., NO.sub.x and uncombustibles.
Thus, there has been no other method in a conventional combustion equipment but to elongate the length of combustion flames so as to bring the temperature of a combustion gas down to a low temperature.
Besides, there has been such a drawback that a heat exchanger becomes large in size when heat exchange is effected between combustion exhaust gas and blown air.
In case multi-stage contact combustion is utilized, there have been such drawbacks that a heating equipment has to be provided in each number of combustion times, that cost of the equipment becomes expensive, and that heat loss is increased because a surface area of the equipment is increased, thus degrading thermal efficiency.
SUMMARY OF THE INVENTION
It is an object of the present invention which has been made in view of circumstances described above to provide a heating equipment in which a heat transfer area of a surface to be heated in a heating chamber can be made small so that the whole heating equipment may be miniaturized and improvement of thermal efficiency can also be aimed at.
It is another object of the present invention to provide a heating equipment in which most of the whole quantity of oxygen in the air for combustion can be utilized and high thermal efficiency is obtainable while suppressing generation of pollution materials.
In order to achieve the objects described above, according to a first mode of the present invention, there is provided a heating equipment consisting of a heating chamber with a bottom having an opening portion in an upper part thereof, a cover body provided at the top portion of the heating chamber, a plurality of heat-exchanger pipe bodies inserted along a vertical direction at predetermined intervals in the heating chamber in diametral directions of the heating chamber, a can plate provided in the lower part of the cover body so as to block the opening portion of the heating chamber and also to support the pipe bodies, a plurality of sheets of baffle plates arranged so as to form a labyrinth stretching vertically in a row in the heating chamber and having the pipe bodies penetrate therethrough, a combustion gas inflow port provided at a bottom portion of the heating chamber or on a sidewall adjacent to the bottom portion and having an opening portion at the bottom portion of the heating chamber and an exhaust gas outflow port provided in an upper part of the heating chamber or on a sidewall adjacent to the upper part and having an opening portion in the upper part of the heating chamber, comprising a main catalytic combustion equipment located outside of the heating chamber and connected to the combustion gas inflow port, a plurality of partition plates provided in the heating chamber so as to partition the labyrinth into a plurality of chambers vertically, and a plurality of auxiliary catalytic combustion equipments provided so as to connect both chambers on the lower side and the upper side of respective partition plates.
According to a second mode of the present invention, there is provided a heating equipment described with respect to the first mode, characterized in that the main catalytic combustion equipment is composed of a first stage combustion equipment consisting of a first mixer for mixing preheated air and fuel with each other
REFERENCES:
patent: 3273542 (1966-09-01), Griffith
patent: 3766892 (1973-10-01), Webster
patent: 3827484 (1974-08-01), Wolowodiuk
patent: 3916990 (1975-11-01), Ruhe et al.
patent: 4256783 (1981-03-01), Takada et al.
patent: 4768580 (1988-09-01), Ferguson
Favors Edward G.
Nippon Chemical Plant Consultant Co., Ltd.
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