JPS6240599B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vaporizer for liquefied petroleum gas (hereinafter referred to as LPG).

(Prior Art) Conventionally, as an LPG vaporizer, a vaporizer A' as shown in a schematic vertical cross-sectional view in FIG. 3 is generally known. That is, this vaporizer A′ has
An introduction pipe 4 communicating with an LPG container 3 is installed at the bottom of a body pipe 1 filled with LPG heat exchange fins 2 in multiple stages.
A riser pipe 4' at the tip thereof is inserted into the body pipe 1 from the bottom, and an outlet pipe 6 in which a pressure reducing valve 5 is interposed is connected to the upper part of the body pipe 1, and the outer periphery of the body pipe 1 is heated. A structure in which a heating medium 9 (for example, cast metal) incorporating a temperature control switch 8 and a drain pipe 10 is connected to the lower end of the riser pipe 4' of the introduction pipe 4. It is becoming. Note that 12 is an on-off valve for the LPG container 3.

(Problems to be Solved by the Invention) However, in the conventional LPG vaporizer A', LPG enters the body pipe 1 from the lower part of the body pipe 1 through the introduction pipe 4, and enters the body pipe 1 through the introduction pipe 4. Once stored, the inner wall surface of the body pipe 1, which is heated to a predetermined temperature and the surface of the heating fin 2, is brought into contact with the surface of the heating fin 2 while rising inside the body pipe 1 to vaporize, so the contact heating is supplied to the consumer side in a state containing mist-like LPG that is not completely vaporized into superheated gas and partially vaporized.
This may result in reliquefaction if the outside air temperature on the consumer side drops. Therefore, in order to avoid such a phenomenon in the conventional apparatus, it is necessary to set the heat exchange area to be excessively large, and the filling amount of the heat exchange fins 2 increases. Furthermore, since a storage volume for LPG is required at the bottom, there is a problem in that the volume of the conventional vaporizer is considerably large. Furthermore, since the LPG drain containing high and medium boiling point components is separated by the riser pipe 4' of the LPG introduction pipe at the bottom of the vaporizer, the separation efficiency of the drain is poor, and most of the drain is separated from the inner wall of the body pipe 1. There were problems in that the gas would stick to the gas or be released while being mixed with the vaporized gas on the consumption side.

In view of the problems of such conventional vaporizers, the present invention aims to reduce the device capacity by improving heat transfer efficiency, and provides an LPG vaporizer with high efficiency in separating drains consisting of high and medium boiling point components. It was made for the purpose of providing.

(Means for Solving the Problems) The present invention will be explained below based on the attached drawings showing embodiments.

FIG. 1 shows a schematic cross-sectional view of an LPG vaporizer A of the present invention. In the following description, the same reference numerals are used for the same parts as in the conventional LPG vaporizer A' shown in FIG. 3.

In FIG. 1, the LPG vaporizer A of the present invention has a body pipe 1 in which a heating medium 9 is arranged around the outer periphery and heat exchange fins 2 are filled in multiple stages inside the body pipe 1. A hollow tubular accumulator 14 having a communication port 13 is installed vertically close to the bottom wall of the body pipe 1, and an inlet pipe 4 with a liquid volume control valve 15 is connected to the upper part of the body pipe 1. A drain pipe 6 with a valve 5 interposed therein and communicating with the liquid volume control valve 15 via a pipe 16 is connected to the upper part of the accumulator 14 , and a drain pipe 10 with a drain discharge valve 11 interposed therein is connected to the accumulator 14 . It is equipped on the bottom of the In addition, 3 in the figure is an LPG container,
7 is a heater for heating the heating medium 9; 8 is a temperature control switch for the heating medium 9; and 12 is an opening/closing valve for the LPG container 3.

(Function) The function of the LPG vaporizer A of the present invention will be explained below.

First, the body pipe 1, heat exchange fins 2, and accumulator 14 of the vaporizer A are heated to a predetermined temperature necessary for vaporizing LPG by heating the heating medium 9 to a constant temperature using the heater 7 and the temperature control switch 8. let

Next, the on-off valve 12 of the LPG container 3 is opened, and a predetermined amount of LPG corresponding to consumption on the consumer side is supplied from the upper part of the body pipe 1 to the upper surface of the heat exchange fin 2 by passing through the liquid amount control valve 15. The supplied LPG is vaporized while flowing down alternately in the direction of the arrow on the inner wall surface of the body pipe 1 and the surface of the heat exchange fins 2 packed in multiple stages. Accumulator 14 from mouth 13
It flows into the lower part of the accumulator 1 at a low flow rate.
It is heated up while rising in the hollow tube of 4.

The accumulator 14 functions to provide a sufficient heating path necessary for superheating the vaporized LPG gas.

Further, drain consisting of high and medium boiling point components of LPG is separated and removed to the outside through a drain pipe 10 provided at the bottom of the accumulator 14. In this case, the accumulator 14 also has the function of effectively separating the drain from the LPG gas.

On the other hand, the LPG gas from which the drain has been separated is sent from the upper part of the accumulator 14 through the pressure reducing valve 5 to the outlet pipe 6 to the consumption side. Here, when gas is not used on the consumption side, it flows into the pipe 16 and the liquid volume control valve 15 is closed, and when gas is used on the consumption side, the liquid volume control valve 15 opens and the consumption amount It is automatically adjusted by a known control means (not shown) so that LPG corresponding to the amount is supplied to the vaporizer A.

(Other Embodiments) FIG. 2 shows another embodiment B of the LPG vaporization apparatus of the present invention.
A schematic cross-sectional view is shown.

The LPG vaporizer B shown in FIG. 2 is completely the same as the vaporizer A shown in FIG. There is.

That is, the liquid volume control valve 15 of the introduction pipe 4 and the body pipe 1
By providing a conduit between the opening 17 at the inner upper part inside the accumulator 14, the conduit is formed in the auxiliary heat exchanger 18. In addition, 19
are fins attached to the outer periphery of the pipe to increase the heat exchange area. When using the vaporizer B of this embodiment, the LPG supplied into the body pipe 1 via the liquid volume control valve 15 is preheated by the superheated gas rising inside the accumulator 14 when passing through the auxiliary heat exchanger 18. Promotes subsequent vaporization of LPG.
Further, the temperature of the superheated gas in the accumulator 14 that has come into contact with the auxiliary heat exchanger 18 drops to some extent, and the condensation of high and medium boiling point components in the superheated gas is promoted on the surface of the auxiliary heat exchanger 18, and drain removal is facilitated. This can be achieved more effectively.

(Effects of the Invention) As explained in detail above, in the LPG vaporizer of the present invention, LPG is flowed from the upper part into the body pipe which has a heating medium ringed around the outer periphery and which is filled with heat exchange fins. The LPG is vaporized and heated while being raised at a low flow rate from the bottom of a hollow tubular accumulator inserted through the body pipe, making the LPG heating path longer and greatly improving heat transfer efficiency. .

In addition, since the required flow rate is controlled by a liquid volume control valve, there is no need to provide an LPG storage volume at the bottom of the body pipe, which, together with the above-mentioned improvement in heat transfer efficiency, makes it possible to downsize the device. can. Furthermore, the drain is effectively separated within the accumulator and smoothly removed from the drain pipe provided at the bottom of the accumulator. Furthermore, by arranging a part of the pipe line leading into the body pipe of the LPG introduction pipe in the accumulator and functioning as an auxiliary heat exchanger, it is possible to simultaneously promote LPG vaporization and drain removal. has.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical cross-sectional view of a liquefied petroleum gas vaporization device of the present invention, FIG. 2 is a schematic vertical cross-sectional view of a liquefied petroleum gas vaporization device showing another embodiment of the present invention, and FIG. 3 is a schematic longitudinal sectional view of a liquefied petroleum gas vaporization device of the present invention. A schematic vertical cross-sectional view of a gas vaporization device is shown. 1... body pipe, 2... heat exchange fin, 3... LPG
Container, 4... Inlet pipe, 6... Outlet pipe, 8... Temperature control switch, 9... Heating medium, 10... Drain pipe, 13
...Communication port, 14...Accumulator, 15...Liquid amount control valve, 18...Auxiliary heat exchanger.

Claims (1)

[Claims] 1 A hollow tubular accumulator having a communication port in the lower part of the body pipe is inserted through a body pipe with a heating medium arranged around the outer periphery and heat exchange fins filled inside, and a liquid volume control valve is interposed therein. An inlet pipe is connected to the upper part of the inside of the body pipe, an outlet pipe is connected to the upper part of the accumulator through which a pressure reducing valve is interposed and communicates with the liquid volume control valve, and a drain pipe is provided to the bottom of the accumulator. A liquefied petroleum gas vaporization device characterized by: