JPS6014146Y2 - horizontal capacitor - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a horizontal condenser in which a heat exchanger block consisting of one or more plate-fin type heat exchangers is disposed within a horizontal cylindrical container mainly used in an air separation chamber or the like.

In rectification operations, such as petroleum refineries and air separation equipment, in which components are separated based on their boiling point differences, condensers are used to exchange heat between high-boiling point components and low-boiling point components to perform condensation-vaporization operations. There is.

In recent years, as devices have become larger, horizontal capacitors have come to be used, in which a heat exchanger block is installed inside a so-called horizontal cylindrical container, in which a cylindrical container is used horizontally due to the relationship between capacity and heat exchange effect. .

However, due to its structure, the horizontal condenser has to be arranged along the central axis in the longitudinal direction of the horizontal cylindrical container in order to install plate-fin type heat exchangers forming a heat exchanger block in parallel. A space cannot be avoided at the bottom.

Therefore, when starting up the horizontal condenser, there is an inconvenience that it takes a long time for the liquid refrigerant introduced into the horizontal cylindrical container to completely immerse the heat exchanger block.

This will be explained with reference to FIGS. 1 and 2 by illustrating a capacitor used in an air separation device.

FIG. 1 is a front view showing the internal structure of a conventional horizontal capacitor with the outer tank cut away, and FIG. 2 is a sectional view taken along the line 1--2 of FIG.

A liquid refrigerant, for example, liquefied oxygen, is introduced into the horizontal cylindrical container 1 from a low-pressure column (not shown) of an air separation device through a nozzle 2. 2, low-temperature oxygen gas is introduced to the outside through a nozzle 3 opened near the top of the horizontal cylindrical container 1.

Next, liquefied oxygen is introduced through the nozzle 2 into the horizontal cylindrical container 1.
While cooling, the liquid is gradually stored in the horizontal cylindrical container 1 and the heat exchanger block 4 is immersed in the fluid introduced into the heat exchanger block 4, for example, from a high pressure column (not shown) of an air separation device. Heat exchanges with nitrogen gas to cool the gas, and part of it becomes oxygen gas, which is then sent out from nozzle 3. Part of it remains in the liquefied oxygen state and is sent to the outside (low pressure tower or product °tank).

The liquefied oxygen liquid level is maintained at the upper end of the heat exchanger block 4 or slightly above the upper end.

On the other hand, nitrogen gas introduced from the nozzle 6 into the heat exchanger block 4, for example, from a high pressure column (not shown) of an air separation device, undergoes heat exchange with liquefied oxygen, cools and condenses, becomes liquefied nitrogen, and flows down to the nozzle 7.
to the outside (for example, a high pressure column).

The conventional horizontal condenser is started up as described above, but in order to effectively use the limited space and arrange the plate-fin heat exchangers forming the heat exchanger block 4 in parallel in the horizontal cylindrical container, it is necessary to Since it is structurally arranged near the central axis in the longitudinal direction of the horizontal cylindrical container, a space is created between the bottom surface of the container and the heat exchanger block 4.

Therefore, when the heat exchanger block 4 is immersed in liquefied oxygen, the liquefied oxygen naturally remains in the space that does not affect the performance of the heat exchanger block 4, that is, between the bottom of the horizontal cylindrical container 1 and the lower end of the heat exchanger block 4. However, it takes a lot of time to store the liquid to a predetermined height through this wasted space, which causes the inconvenience that the startup time is delayed by that time.

Furthermore, since the opening of the nozzle 2 for introducing liquefied oxygen needs to be placed at the top in relation to the liquid level stored in the horizontal cylindrical container, the low-temperature oxygen gas introduced from the nozzle 2 during the pre-cooling stage is The vaporized gas is immediately discharged from the nozzle 3 near the top of the horizontal cylindrical container 1, resulting in only partial cooling of the cylindrical container.

Therefore, in order to cool the entire horizontal cylindrical container 1, it is necessary to introduce liquefied oxygen little by little from the nozzle 2 for cooling, and then introduce a specified amount of liquefied oxygen once cooling is sufficient. Even the pre-cooling stage had to take a lot of time.

The present invention was proposed in view of the above circumstances, and its purpose is to improve the conventional horizontal condenser to make better use of the cold of refrigerants such as liquefied oxygen, thereby shortening the start-up time. The feature is that a partition formed by a protruding plate is provided at the bottom of a conventional horizontal condenser to reduce the wasted space, and the end of the partition is connected to the partition and opens into the space above the refrigerant liquid level. This is because a pipe was installed.

An embodiment of the horizontal capacitor of the present invention will be described below with reference to FIGS. 3 and 4, in which the same components as in FIG. 1 are given the same reference numerals as in FIG. 1.

FIG. 3 is a front view showing the internal structure of the horizontal capacitor according to the present invention with the outer tank cut away, and FIG. 4 is a sectional view taken along line IV-IV in FIG.

The partition chamber 10 is constituted by the bottom surface of the horizontal cylindrical container 1, a partition plate 8 made of a curved plate, and flat plates 9, 9 provided at both ends of the partition plate 8 to form a space that is itself sealed.

The partition plate 8 is a curved plate that bulges out from the bottom of the horizontal cylindrical container 1 toward the heat exchanger block 4 so that it can easily absorb heat shrinkage. If consideration is not required, the shape is not limited to this, and even if heat shrinkage is taken into consideration, it is not limited to a curved plate, and may be, for example, a flat plate.

A pipe 11 communicates with the partition chamber 10 , and an opening at the end of the skeleton 11 is opened above the upper end of the heat exchanger block 4 to allow the evaporated gas of the refrigerant introduced into the horizontal cylindrical container 1 to flow into the partition chamber 10 . The pressure in the partition chamber 10 is approximately the same as that in the container 1.

Therefore, there is an effect that the partition chamber 10 only needs to be strong enough to receive the head pressure of the refrigerant.

Although four skeletons 11 are provided in this embodiment, this is done to balance the flow of evaporative gas, and the number can be changed as necessary.

A nozzle 12 communicating with the partition chamber 10 is provided at the bottom of the horizontal cylindrical container 1, and communicates with a nozzle 3 outside the container 1.

In this embodiment, the nozzle 5 for deriving liquefied oxygen is a partition chamber 10.
The partitions 10 are arranged on both sides of the cylindrical container 1 to uniformly discharge liquefied oxygen, and this is because the partition 10 does not include the chain part of the cylindrical container 1, making manufacturing easy and reliable.

In this embodiment, two nozzles 7 are provided for discharging the fluid introduced into the heat exchanger block 4 and liquefied. This is because the curved portion of the heat exchanger block 4 is located directly below the lower end of the heat exchanger block 4.

By locating the top of the curved portion of the partition chamber 10 directly below the lower end of the heat exchanger block 4, space can be used effectively, wasted space can be reduced, and manufacturing can be facilitated and ensured.

Next, the activation of the horizontal capacitor configured as described above will be explained.

First, in the pre-cooling stage that is performed before introducing liquefied oxygen, the low-temperature oxygen gas introduced from nozzle 2 branches and flows vertically between nozzle 3 and nozzle 12, and during this period, the horizontal condenser is exposed to cold air. and cooled evenly.

Next, liquefied oxygen is introduced and stored, but at this time, precooling is sufficient, so there is no need to introduce it little by little as in the case of conventional horizontal condensers, and the specified amount can be introduced immediately.

Since the introduced liquefied oxygen is stored above the partition plate 8, the heat exchanger block 4 is completely immersed in a short time.

As mentioned above, since the horizontal condenser of the present invention has a partition chamber inside the cylindrical container, the utilization of the cold of the refrigerant in the cooling stage is greatly improved, the cooling time is shortened, and the space below the lower end of the heat exchanger block is reduced. Since the amount of heat exchanger is reduced by a large amount, the time during which the heat exchanger block is immersed in the refrigerant is greatly shortened, and the start-up time can be reduced by a large amount compared to conventional horizontal capacitors, which has high practical value.

[Brief explanation of the drawing]

Figure 1 is a front view with the outer tank of a conventional horizontal capacitor cut away to show the internal structure, Figure 2 is a sectional view taken along the line n-■ in Figure 1, and Figure 3
The figure is a front view of a horizontal capacitor according to an embodiment of the present invention, with the outer tank cut away to show the internal structure, and Figure 4 is Figure IV-I.
It is a V sectional view. 1 is a horizontal cylindrical container; 2. 3. 5. 6. 7. 1
2 is a nozzle, 4 is a heat exchanger block, 8 is a partition plate, 10 is a partition chamber, and 11 is a tube.

Claims (1)

[Scope of utility model registration request] A liquid refrigerant is introduced into a horizontal cylindrical container containing a heat exchanger block made of a plate fin type heat exchanger, the heat exchanger block is immersed, and the fluid introduced into the heat exchanger block is cooled and condensed, and the liquid refrigerant is In the horizontal condenser, a partition plate is protruded from the bottom surface of the container located below the heat exchanger block in the horizontal cylindrical container to form a partition chamber, and the ends thereof communicate with the partition chamber. 1. A horizontal capacitor, characterized in that a pipe opens near the top of the container, and a gas outlet nozzle extends outside the container.