JPS6212159Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improvement in an open rack type vaporizer for vaporizing a liquefied refrigerant such as liquefied natural gas.

Open rack type vaporizer has heat exchange panel 1
It has a configuration in which headers 2 and 3 are attached to the upper and lower parts to pass the liquefied refrigerant into the flow path, and the heat medium is made to flow down from the water sprinkler 4 onto the outer surface of the heat exchange panel 1. Conventionally, a plurality of finch tubes 5 are arranged vertically. Although the panels were connected by regular welding to form the heat exchange panel 1, there were problems such as a low heat exchange rate and high manufacturing cost.

Therefore, a heat exchange panel 1 was devised in which flat plates 11 and corrugated fins 12 were alternately stacked, and both sides of each flow path were closed with spacer bars 13, thereby improving thermal efficiency and reducing costs. Furthermore, the applicant has proposed a heat exchange panel 1 in which the heat transfer area is increased by fixing corrugated fins 14 to the outer surface of the flat plate 11, thereby greatly improving thermal efficiency. However, by providing the corrugated fins 14 on the outer surface, the thermal efficiency was improved, but the corrugated fins 14 and the flat plate 1
There was a problem in that ice easily formed in the space between 1 and 1, and when seawater was used as a heat medium, sea creatures were attached and it was difficult to remove them.

The purpose of this invention is to solve such problems and to propose a vaporizer that has high thermal efficiency and is easy to manufacture.

That is, this idea consists of alternately stacking flat plates and corrugated fins, closing both sides of each channel with spacer bars to form a heat exchange panel, and attaching headers to the top and bottom of the panel to close the channels. In an open rack type vaporizer in which a liquefied refrigerant is passed through and the heat medium on the outer surface of the heat exchange panel flows down, a flat plate on the outer surface of the heat exchange panel is provided with a profile material, that is, an angle member with an L-shaped cross section, and an inverted T-shaped cross section. This is an open rack type vaporizer in which molded tie members or U-shaped channel members are vertically fixed outward at regular intervals.

This invention will be explained in detail below based on drawings of embodiments. FIG. 4 is a cross-sectional top view of the heat exchange panel according to this invention.

Here, an example will be described in which there are two passages for the liquefied medium. A corrugated fin 12 is sandwiched between three parallel flat plates 11, and both ends thereof are closed with spacer bars 13 to form a vertical passage. Further, a plurality of channel members 15 each having a U-shaped cross section are fixed to the flat plate 11 constituting the outer surface at regular intervals with the openings facing outward to form the heat exchange panel 10.

Header tanks are attached to the upper and lower parts of the heat exchange panel 10 configured as described above, and when liquefied natural gas, for example, is introduced from the lower header and raised in the passage, a water sprinkler is directed from above the panel 10 to each channel material 15. Then, a heat medium such as seawater is sprinkled and flows down the entire outer surface of the panel 10 in a film form, exchanging heat, and the liquefied natural gas is vaporized and sent out from the upper header.

Since the heat exchange panel 10 according to this invention has channel materials attached at predetermined intervals, the heat transfer area of the outer surface where the heat medium flows down in a film shape is significantly increased, and the heat exchange efficiency is improved. Reduce the number of heat exchange panels used in the entire plant equipment to approximately 30 to 50.
% can be reduced.

Further, in manufacturing the heat exchange panel, after assembling the above-mentioned members, they can be integrally and firmly fixed together by brazing, which has the advantage of being easy and inexpensive to manufacture. Furthermore, since the channel material is open and fixed at predetermined intervals, ice and sea creatures adhering to the outer surface of the panel can be easily removed.

Furthermore, in addition to the above-mentioned channel material having a U-shaped cross section, the shape material used in this invention may also be an angle material having an L-shaped cross section, or a tie material having an inverted T-shaped cross section, with the same effect. is obtained.

[Brief explanation of the drawing]

FIG. 1 is a front explanatory view of the open rack type vaporizer, FIGS. 2 and 3 are cross-sectional top views of the heat exchange panel, and FIG. 4 is a cross-sectional top view of the heat exchange panel according to this invention. In the figure, 10... heat exchange panel, 11... flat plate,
12... Spacer bar, 13... Wave-shaped fin,
15...Channel material.

Claims (1)

[Scope of utility model registration request] A heat exchange panel is constructed by stacking flat plates and corrugated fins alternately and closing both sides of each channel with spacer bars.Headers are attached to the top and bottom of the panel to pass liquefied refrigerant through the channel. In an open rack type vaporizer that allows a heat medium to flow down on the outer surface of a heat exchange panel, sections of L-shaped, inverted T-shaped, or U-shaped sections are vertically spaced at regular intervals on a flat plate on the outer surface of the heat exchange panel. An open rack type vaporizer that is fixed facing outward.