JPS6133218A - Centrifugal type gas treating device - Google Patents

Abstract

PURPOSE:To decrease the overload to be exerted to rotary cylinders when said cylindres slow down by communicating the damper chambers of respective centrifugal gas treating machines with each other. CONSTITUTION:The damper chambers 13 of the centrifugal gas treating machines 1 are communicated with each other by connecting, for example, the chambers 13 by connecting pipes 26 having connecting valves 27 so that the remaining gas in the machine 1 under slow-down to the other machine under the normal rotation. As a result, if it is assumed that a fault arises in, for example, the central machine 1 and that the rotary cylinder 3 thereof slows down, a gas feed valve 20 and discharge valve 21 for said cylinder close and the gas moves to the other machine 1 under the normal rotation as shown by an arrow according to the decrease in the rotating speed of the machine 1 and therefore the remaining gas in the slowing down machine 1 is discharged and the overload condition is lessened even if a discharged device is not specifically provided.

Description

Detailed Description of the Invention The present invention relates to a centrifugal gas processing device such as a centrifugal gas concentration separation device or a centrifugal gas boosting device, and particularly relates to a centrifugal gas processing device such as a centrifugal gas concentration separation device or a centrifugal gas boosting device. The present invention relates to a centrifugal gas processing device that reduces the amount of gas.

FIG. 1 shows a conventional example of a centrifugal gas processing apparatus in which a plurality of (three in this figure) centrifugal gas processing apparatuses 1 are connected in parallel. In general, centrifugal gas processing machines have a limited processing capacity due to the high speed rotation and restrictions such as the strength of the materials used. The gas treatment equipment becomes the core wall. Each of the centrifugal gas processing machines 1 introduces processing gas from an air supply pipe 18 into the center of a rotating barrel that rotates at high speed within a casing kept in a high vacuum state, and introduces processing gas from near the inner periphery of the rotating barrel. The gas is led out through a discharge pipe 19. The air supply pipe 18 of each processing machine 1 is connected to the air supply header 22 via each air supply valve 20,
The discharge pipe 19 is connected to a discharge header 24 via each discharge valve 21. The air supply header 22 is connected to a gas supply process (not shown) through a piping 23, and the discharge header 24 is connected to a piping 25.
The cine is connected to the gas intake process shown. During steady operation, the space between the outer surface of the rotary shell and the casing of each machine 1 and the center of the rotary shell are in a high vacuum state, but gas is concentrated in the inner circumference of the rotary shell and the pressure is high. It's going up.

In the centrifugal gas treatment apparatus shown in Fig. 1 above, any one of
When an abnormality occurs in the centrifugal gas processing machine 1 and its rotary cylinder becomes inactive or stopped, the air supply valve 20 and discharge valve 21 for the centrifugal gas processing machine must be closed. This is because if both valves 20 and 21 are left open, the gas before treatment and the gas after treatment will pass through the air supply pipe 18 and discharge pipe 19 of the centrifugal gas processor 1, which is in an active or stopped state. If the pressure on the discharge side is higher than the pressure on the supply side, a backflow phenomenon may occur, which may affect the gas feeding process (not shown). be.

In this way, when an abnormality occurs, the centrifugal gas processor 1 is in a fast state, and its air supply valve 20 and discharge valve 21 are closed, so that it is in a sealed state completely isolated from the outside), its rotating body, and its air supply pipe. The residual gas in the casing 18 and the discharge pipe 19 moves as the rotational speed of the rotating drum decreases so that the pressure in each part of the casing becomes uniform. As a result, the pressure on the outer circumferential surface of the rotary cylinder increases and the rotary cylinder becomes overloaded.
There is a risk that the rotating body may be destroyed due to abnormal vibrations. As a countermeasure against this, there is an example of installing an emergency exhaust system, but this has the disadvantage of requiring extra equipment.

Therefore, it is an object of the present invention to provide a centrifugal gas processing device that can reduce the overload on the rotary barrel that occurs in the centrifugal f-gas processing machine under abnormal speed conditions as described above, with a simple and economical configuration. It is on offer.

The present invention focuses on the fact that a normally rotating centrifugal gas processor has the property of sucking gas from outside the rotating barrel into the rotating barrel, and the present invention has developed a system that combines multiple centrifugal gas processors connected in parallel. In this centrifugal gas processing equipment, in order to reduce abnormal vibrations caused by overload conditions in the centrifugal gas processing machine during abnormal operation, residual gas in the centrifugal gas processing machine during normal rotation is removed. The basic idea is to bring the damper chambers of these centrifugal gas processors into communication so that they can be moved to other centrifugal gas processors.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a cross-sectional view of one of the plurality of centrifugal saturation machines used in the embodiment of the present invention. The centrifugal gas treatment machine 1 has a cylindrical casing 2, the inside of which is maintained in a negative pressure state. A cylindrical rotating body 3 is housed inside the cage 7 so that its axis substantially coincides with that of the rotating body 3, and a shaft 5 attached to its lower end 4 is attached to a bearing plate 6.
It is supported by a bigot bearing. A magnet 9 is attached around an opening υ formed in the upper end 7 of the rotating body 3. A through hole 11 is provided in the center of the upper partition plate 10 of the casing 2, which faces the opening 8 of the rotating body 3, and a magnet 12 is attached to the lower surface of the partition plate around the through hole 11. Together, they constitute a magnetic bearing for the upper part of the rotating body 3.

The space above the partition plate 10 of the casing 2 serves as a damper chamber 13.

A motor stator 14 is attached to the inner surface of the lower end of the casing 2, and a motor rotor 15 is attached to the lower surface 4 of the rotating body, both of which constitute a motor that rotates the rotating body.

A bond seal 16 is provided at the upper part of the vertical part where the rotary shell 3 and the casing 2 extend, and this sucks up gas existing below the bond seal 16 to the upper part as the rotary shell 30 rotates. do the work.

In the center of the upper wall 17 of the casing 2, an air supply pipe 18 that introduces the processing gas into the machine and a discharge pipe 19 that leads it out of the machine airtightly pass through. This air supply pipe 18 and discharge pipe 19f'i
,, Partition plate 100 through hole 11 and rotating body opening 8't
- extends downwardly through and into the interior of the rotating barrel. The tip of the air supply pipe opens at the center of the rotating body 3, and the discharge pipe 19
is bent horizontally within the rotary drum, and its tip is open near the inner circumferential surface of the rotary drum.

The operation of the centrifugal gas processing machine described above will be explained below. After increasing the speed of the rotary drum 3 to the rated rotational speed while maintaining the inside of the casing 2 at a high vacuum, the processing gas is passed through the air supply pipe 18 to the rotary drum 3. Introduce it into the center of the interior. The introduced gas rotates inside the rotary shell and gradually moves to the inner peripheral surface of the rotary shell (due to centrifugal force).

This moved gas enters the opening at the tip of the discharge pipe 19 and is led out of the machine through the discharge pipe 19. In steady operation, the center of the rotating shell, the four chambers, and the space between the outer periphery of the rotating shell and the casing 2 are in a high vacuum state, while gas is concentrated in the inner periphery of the rotating shell. The pressure is rising.

Now, in this embodiment, the above-mentioned centrifugal gas treatment machine 1
As shown in FIG. 3, a plurality of units (three units in the figure) are connected in parallel to form a centrifugal gas processing apparatus. FIG. 4 schematically illustrates this. The air supply pipe 18 of each centrifugal gas processor is connected to the air supply header 22 through each air supply valve 20, and the discharge pipe 19 is connected to the discharge header 2 through each discharge valve 21.
Connected to 4. The gas supply head 22 is connected to a gas supply process (not shown) via piping 23, and to a discharge header 24.
An f-socket (not shown) is connected to a feeding process via a pipe 25.

When one centrifugal gas treatment machine 1 that is in operation develops an abnormality and its rotary cylinder becomes unstable, the air supply valve 20 and discharge valve 21 belonging to that centrifugal gas treatment machine should not be closed. This is the same as described for the conventional example shown in FIG. If no other means are provided as in the conventional example, in the centrifugal gas processing machine of the descending company, the VS is cut off by closing the air supply valve 20 and the discharge valve 21, and the airtight state is established. , the residual gas in the rotary shell 3, the air supply pipe 18, and the discharge pipe 19 moves so that the pressure in each part of the casing becomes uniform as the rotation speed of the rotary shell decreases, and the pressure on the outer peripheral surface of the rotary shell 3 decreases. As mentioned above in connection with the prior art example, there is a risk of overloading the rotary cylinder due to the rise of the rotary cylinder, resulting in destruction.

In order to prevent this, in this embodiment, the dump chambers 13 of each centrifugal gas processing PAx are connected to each other by a communication pipe 26 having a communication valve 27 (which is always open). There is.

For example, if an abnormality occurs in the central centrifugal gas processing machine in Fig. 3 and its rotary cylinder is in a high state, the air supply valve 20 and discharge valve 21 for it will close, and the rotational speed of the rotary cylinder will increase. As it descends, the gas moves to other centrifugal gas processors that are rotating normally, as shown by the arrow, so even if a special exhaust system is not installed, the residual gas in the centrifugal gas processors that are descending will be exhausted and the excess gas will be exhausted. The load condition is reduced. After the centrifugal gas processing machine that has caused the abnormality is stopped, it can be inspected and maintained after being shut off from other processing machines by closing the communication valve 27.

FIG. 5 shows another embodiment of the present invention, in which the same or corresponding parts as in FIGS. 1 to 4 are given the same reference numerals. In this embodiment, each centrifugal gas processing machine is not separate, but
These rotary cylinders 3 are housed in one casing 2 and have a common damper chamber 13. In this embodiment, the connecting pipe 26 shown in FIGS. 3 and 4 is omitted, making the overall structure of the device simple and economical. It is clear that this embodiment also has the effect of reducing the overload on the rotary drum during emergency landings, similar to the previous embodiment.

As described above, according to the present invention, in a centrifugal gas processing apparatus consisting of a plurality of centrifugal gas processing machines, the overload that is applied to the centrifugal gas processing machines during descent due to an abnormality can be overcome with a simple structure. It has an excellent effect on reducing stress.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing Torora's centrifugal gas processing equipment, Figure 2
The figure is a sectional view of a centrifugal gas treatment machine used in an embodiment of the present invention, FIG. 3 is a schematic sectional view of an embodiment of the present invention, FIG. 4 is a schematic diagram of the embodiment, and FIG. FIG. 3 is a schematic cross-sectional view of another embodiment of the invention. 1... Centrifugal gas treatment machine, 2... Casing,
3... Rotating cylinder, 8... Upper opening of rotating cylinder, 9... Magnet, 10... Partition plate, 11... Through hole, 12... Magnet, 1
3."Damper chamber, 14, 15...Motor, 1
6... Pump, seal, 18... Air supply pipe, 19
...Discharge pipe, 20...Air supply valve 21...
・Discharge valve, 26...Communication pipe, 27...Communication valve. Figure 3 Figure 1 Figure 2 Figure 4 Figure 5

Claims (1)

[Scope of Claims] 1. A casing whose interior is kept in a negative pressure state, a rotating body having an opening in the center of the end wall and rotatably supported within the casing, and an end wall of the casing an air supply pipe that penetrates and extends into the rotary shell through the opening of the rotary shell and opens near the center of the rotary shell; a discharge pipe that opens near the inner circumferential surface of the rotary shell; and an outer periphery of the rotary shell. A centrifugal gas treatment machine includes a pump seal provided at one end of the gap with the inner wall of the casing, and a damper chamber formed within the casing on one side of the opening of the rotating barrel and in a state of ventilation with the inside of the rotating barrel. In a centrifugal gas processing device consisting of multiple units connected in parallel,
A centrifugal gas processing device characterized in that damper chambers of each of the centrifugal gas processing devices are communicated with each other. 2. The centrifugal gas processing device according to claim 1, wherein the damper chambers of each centrifugal gas processing device are communicated with each other through a communication pipe having a valve. 3. The centrifugal gas treatment device according to claim 1, wherein the damper chambers of each centrifugal gas treatment device form one common chamber.