Direct heating device

Details Direct heating device Direct heating device

2002-07-03

2003-10-28

Wilson, Gregory (Department: 3749)

Liquid heaters and vaporizers

Cleaning

Fluid jet

C122S438000, C122S442000, C239S138000

Reexamination Certificate

active

06637380

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a water heating device. More particularly, the present invention relates to a heavy-duty fast-speed direct heating device which uses steam as its heat source.
BACKGROUND OF THE INVENTION
Water heating devices using steam as heat resources have two major categories, that is, the direct heating type and the indirect heating type. Indirect water heating devices have many limitations in actual production and application due to their low heat efficiency, low heating speed, large heat exchanger size, as well as their vulnerability to clogging due to incrustation.
Although direct water heating devices have the advantages of higher heat efficiency, higher heating speed, smaller size and no incrustation, they can generate enormous noises and shrewd shocks when the steam comes into contact and mixes with the cold water. Therefore, this type of heating devices are usually used where industrial production requires instant heating of a large amount of water.
FIG. 1
is a cross-sectional view of a conventional heater, which includes a casing
21
, a steam inlet
24
on one end of the casing
21
, and a water outlet
25
on the other end of the casing
21
. A steam pipe
22
is coupled to one end of the casing
21
. A water inlet
23
is provided on the wall of the casing
21
. Such a conventional heater produces considerable noises during operation due to the lack of silencing and depressurization measures.
SUMMARY OF THE INVENTION
The present invention provides a direct heating device having advantages, such as low working noise and shock level, high heat efficiency, fast heating speed, small size, high incrustation resistance, high reliability, low maintenance, long service life, flexible and convenient use, as well as high or super high temperature.
The direct heating device can comprise a main casing. The main casing can have a first end adapted to be coupled with a support structure, such as a monoblock fastening flange. One or more water inlets can be formed in the wall member of the main casing near its first end. One or more water outlets can be provided at the second end of the main casing. A sprinkler head can be provided inside the main casing. The sprinkler head can be in a funnel shape having its large diameter end coupled with the support structure, such as the monoblock fastening flange. A critical nozzle in the shape of a long trumpet can be coupled with the small diameter end of the sprinkler head.
In the direct heating device, the water inlets can be spaced away from the first end of the main casing. For example, the water inlets can be spaced from the first end for a distance of about one fourth of the casing length. Additionally or alternatively, the water inlets can be equally spaced on the wall member of the main casing. The number of the water inlets can range from two to six. Additionally or alternatively, the water outlets can be provided in the wall member near the second end of the main casing. The number of the water outlets can range from two to six.
If desired, a high pressure mixing chamber can be provided between the critical nozzle and the water outlets. The mixing chamber can be a round tube.
Optionally, an elbow portion can be mounted to the support structure, for example, on an opposite side of the monoblock fastening flange.
Additionally or alternatively, the main casing can be a double layer construction and comprise outer and inner wall members forming a silencing and shock-isolation chamber therebetween. One or more water inlets can be formed in the inner wall member. The number of the water inlets in the inner wall member can be up to six.
Additionally or alternatively, a pressure relief damper can be provided in the direct heating device. The pressure relief damper can comprise a tail end coupled with the main casing and a tapered end extending into the main casing.
These and other features and advantages of the present invention will be readily apparent from the following detailed description of the invention, the scope of the invention being set out in the appended claims.


REFERENCES:
patent: 123264 (1872-01-01), Korting
patent: 1801811 (1931-04-01), Haber
patent: 4036020 (1977-07-01), Bagley
patent: 5462229 (1995-10-01), Tanaka et al.
patent: 6093310 (2000-07-01), Swan

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