JPS59213427A - Detection of abnormality in gas separation apparatus - Google Patents

Abstract

PURPOSE:To discriminate an abnormal part by measuring the pressure at the central part of a rotating drum of a centrifuge on the lighter component discharging side of a cascade and the pressure between cascades, and conducting a logical judgement on the basis of the same measured value of the cascade using a supply apparatus in common. CONSTITUTION:When a gasification apparatus or a supply apparatus is abnormal, each pressure gauge 17 for a centrifuge provided to the centrifuge at the lighter component discharging part of a cascade apparatus shows high pressure and an output is present. Consequently, the output of an OR circuit of O1 and the output of an AND circuit of A4 are present. In this way, the generation of the abnormality in a gas separation apparatus is detected. When only one of the pressure gauges for the centrifuge of the cascade apparatus outputs and the others do not output, the cascade apparatus having the outputting pressure gauge is judged to generate abnormality.

Description

[Detailed Description of the Invention] Field of Application of the Invention The present invention relates to a method for detecting an abnormality when nitrogen gas leaks into the interior of a gas separation device operated under negative pressure, and particularly relates to a method for detecting an abnormality when nitrogen gas leaks into a gas separation device operated under negative pressure. The present invention relates to a method for detecting abnormalities in gas separation equipment suitable for detecting and identifying abnormalities.

[Background of the invention]

Since the centrifugal separator t used in the waste separation device is generally operated under negative pressure, pressure gauges are installed at various locations inside the device i to monitor it. In a cascade system consisting of a large number of centrifugal separators, a method is used in which pressure gauges are installed in header piping to monitor pressure and detect abnormalities.

If there is a relatively large number of leaks, the pressure inside the device will rise dramatically, so the above method can be used to detect all abnormalities, but in the case of small leaks, it is difficult to detect abnormalities. . In other words, in the part of the waste generator and the supply device 1"A, the pressure is set to 11 to keep the pressure constant, so even if a small leak occurs in this MB, the pressure remains within the range that the control can follow. There is no phenomenon called "upper case".

For this reason, the leakage will be supplied to the cask T/equipment R, but the pressure in the hexagonal piping also shows a normal value. , the monitoring pressure H1 is not considered abnormal.

1. In a centrifugal separator, scum that is as light as air is not easily affected by centrifugal force, so the pressure at the center of the rotating barrel and the area surrounded by the outer IHj of the rotating barrel and the outer surface of the casing increases. The centrifuge will be overloaded.

Regarding the above, <In the conventional example, even if a small leak occurs in the part where the supply is connected to the cascade device, an abnormality cannot be detected."
There is a drawback that the IL/minute N1F may become overloaded and lead to failure.

[Objective of the Invention J The present invention aims to solve the problem of minute 11
- To provide an anomaly detection method suitable for detecting the occurrence of the problem early and in which part of the waste separator it is generated. [Summary of the Invention] In the cascade device, the 9 qi moves in a car containing a large amount in the main component gas, and is collected at the light component gas exit ``,'l i+t11'' on the west side of the cascade device. The main component of the device (Jj r-
1-1411 The pressure at the center of the rotating body of a centrifugal separator equipped with a VC, or the pressure on the outer surface of the rotating body and outside the casing.
Detect abnormalities by measuring them, and identify abnormalities by making simple logical judgments based on similar measurement values of cascade devices that share the supply device'f! :Characteristic 6. [Embodiment of the Invention] An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

The amount of waste generated in the waste generator 1 is connected to the inlet valve 3 of the supply device 2 and the pressure? The pressure is passed through the A-node valve 4 to the 8-cycle phasing 5. This pressure gauge 4 regulating tank 5 is a pressure regulator J
It is adjusted to one foot pressure by y M l' b.

j Tamariku+! At the output 1 of the tank 5, there are a Yamaguchi valve 7, a flow control valve 8, a flow control valve 8, a ηt, lj4 controller 9. By adjusting the flow rate control valve 8, a predetermined amount of gas to be separated is transferred to the heater pipe 1.
Supply to 0. .

The supplied or separated gas from the supply device Li, 2 is distributed and supplied to each cascade device i'<12 via a feeder pipe 10 and a supply valve 11.

Cascade device i 12-, ~. It is separated into main component gas and Mi component gaff, and one component gas is released [1 valve 13].
is sent to the stem component collection and recovery device M':15 rL,
The component gases are sent to the heavy component extraction and recovery device i''+: 16 through the heavy component port valve 14, where they are collected and recovered.

Cascade device J1t12. The trunk component outlet part (thump stage) K of 3 to 3 is a pressure section 17- for a centrifuge related to the present invention.
3 to 3 are provided for each cascade pupil.

Next, the cascade device 12 will be explained with reference to FIG.

The cascade device tllj is a system in which a large number of centrifugal separators 18 are arranged in a cascade through piping connections, and the gas to be separated is supplied from the supply header piping 19 to each center-of-gravity front unit 18, where it is separated from the main component gas and generated. Separated into dregs. The main component gas is transferred to the main component header piping 20, and the product gas is transferred to the heavy component header pipe 21, and sent to the supply piping 19 for the upper and lower stages, respectively.

Furthermore, the structure of the centrifugal separator 18 used in the cascade apparatus 12 as described above will be explained with reference to FIG.

The rotary drum 24 rotating at speed A in the goo song 23 held in a negative pressure state is opposed to a magnet 26 that is attached around an opening 25 provided at the center of the end of the rotary drum 24. The upper magnetic bearing formed by the magnet 28 fixed to the partition plate 27 supported by the casing 23 makes one sound.
It is supported by a lower bearing 29.

Pass through the upper part of the casing 23 and open the opening 2 of the rotary cylinder 24.
5, an air supply pipe 30 for supplying the gas to be separated into the vicinity of the central axis in the rotary cylinder, and a light component extraction pipe 31 and a claw component extraction pipe 32 for extracting the separated light component gas and heavy component waste. Set up, fl.

Also, a motor rotor 3 mounted on the lower end of the rotating body 24
The rotary cylinder 24 is moved by a motor consisting of a motor stator 34 and a motor stator 34 facing the motor stator 34 and fixed to the casing 23.

The centrifugal separator 18 installed at the first part (top stage) of the light component outlet of the cascade unit η12 is connected to the H of the tamper chamber 35 surrounded by the partition plate 27 and the second part of the thing 23 as shown in FIG. - A pressure cutter 17 for the centrifugal separator is provided which applies the force.

In the gas separation device 4 as described above, t
l. The pressure in each part of the gas separation device is maintained within a constant pressure range:
i'1 is there. ,% The internal pressure of the centrifuge 18 in the cascade device K12 is as shown by curve A in FIG. The pressure in the gap surrounded by the outside and the casing 23 is maintained at a high level in the chamber 35.

However, if a gas such as 9 qi is not supplied into the 'IJ' separator, the pressure at the center of the rotating cylinder and outside the rotating cylinder will rise, as shown in curve 13 in Figure Hayashi 1.4. .

In cascade decoration, when a light gas such as an empty package is mixed in, it mixes with the light component gas of the gas to be separated and gradually moves to the light component outlet side (tosog stage side) of the cascade device.
As a result, light gas such as empty cartridges is accumulated in the centrifugal separator of the light component extraction section (top stage) of the cascade device.

In the wooden axis example, the Il component quantity IJ part of the cascade device (
The centrifugal separator (tongue stage) is equipped with a pressure gauge 17 for centrifugation as shown in Figure 5, so this pressure gauge can be used to detect if a leak (leakage of gas) occurs in the gas separation device. It is possible to detect even the smallest leaks at an early stage.

Next, using Fig. 6, we will explain the detection of minute leak abnormalities in the gas separation device and the identification logical judgment of the location where they occur.1-
Ru.

(1) Abnormal gas generation equipment or supply equipment The amount of gas generated by the generator is received by the supply device.

The state will be controlled and the pressure will not increase. Therefore, the pressure gauges (for example, the pressure regulator 6, etc.) in the gas generator and supply device cannot detect abnormalities.

However, the air is mixed in the device and is supplied to the cascade device.

In this case, the light component outlet section (top stage) of the cascade device
Pressure gauge for centrifugal separation installed in the centrifugal separator 17. ~
．． In both cases, the pressure becomes high and there is output. Therefore, the output of the OR circuit of 0+ and the output of the AND circuit of A4 are present, and it is possible to detect that an abnormality has occurred in the gas separation equipment, and the location of the abnormality can be determined from the common gas generator or supply equipment. It can be determined that there is part V.

If the amount of retarder is large and exceeds the pressure adjustable range of the gas generator or supply device, the pressure gauges (for example, pressure regulator 6, etc.) provided in each device will become abnormally high and will be detected.

(2) If only one of the centrifuge river pressure gauges 17-5 to 17-5 of the abnormal cascade equipment in the cascade is outputting and the others are not, the pressure gauge that is outputting It is determined that an abnormality has occurred in the cascade device having 7. For example, pressure gauge 17-
1 detects high pressure, pressure gauge 17-2 and pressure gauge 17
-3, if the entire pressure surface is not detected, N2 and N
The output of the NOT circuit of , is positive, the condition of the A1 (ANI) circuit is satisfied, and it is determined that the cascade device Ki, 12 is abnormal.

(3) Abnormality of the light component and heavy component collection and collection equipment - centrifugal Nf machine pressure d [17-1
~, if high pressure is not detected in either case, N,, N
The outputs of the NOT circuits 2 and N are present, and the AND circuit condition of A is satisfied, resulting in an output. In such a state, the pressure gauge of the light component extraction and recovery device (not shown in Figures 1 to 5) of the heavy component extraction and recovery device
When detects a high pressure and outputs, the AND circuit condition of A or A is established, and it is determined that the light component collection and recovery device is broken or the iQ component collection and recovery device is abnormal.

Therefore, it is possible to detect the presence or absence of an abnormality even if there is a minute leak, and it is also possible to identify which part of the gas separation equipment the abnormality is occurring in, so that measures can be taken early to prevent damage to the equipment. However, when performing maintenance such as repairing an abnormal part, since the area of the abnormal part is immediately limited, the time required for maintenance can be shortened.

A pressure gauge for centrifugal separation has the same effect even when measuring the center of the rotating barrel or measuring the force area surrounded by the outside of the rotating barrel and the inner surface of the casing. In addition, if there are multiple centrifuges at the light component outlet (top stage) of a cascade device, make sure to install one with a common pressure gauge.
, - also has the same 9J) vermilion.

〔Effect of the invention〕

According to the present invention, minute leaks can be detected early and abnormal parts can be identified, thereby preventing damage to equipment within the device 1.
This has the effect that it is possible to prevent 1) and 2) from occurring, and to shorten the time it takes to repair abnormal parts.

[Brief explanation of drawings]

;is Figure 1 shows an embodiment of the present invention, a device for separating small and pregnant females.
Figure 2 is an explanatory diagram of the cask°-dog target, Figure 3 is a 4N diagram of a centrifuge, Figure 4 is an explanatory diagram of pressure distribution inside the centrifuge, and Figure 5 is a diagram of the centrifugal separator. Pressure cup for minute 1Iiti machine
Of course, there is an example of Kazuo's drawing of a centrifugal separator in which f is multiplied by η. DESCRIPTION OF SYMBOLS 1... Gas generator, 2... Supply device, 3... Population valve, 4... Pressure adjustment valve, Death... Pressure adjustment tank, 6...
・Pressure adjustment 1l-17...Output (-1 valve, 8...Flow control valve, 9...Flow rate controller, 1 (J...Henter piping, 11...Supply valve, 12. ~3... Cascade device, 13... Light component outlet valve, 14...l (L component outlet valve, 15... Phase = component collection and recovery device name °, 16...
jI■ component collection and recovery device n, 17. ~3... Pressure gauge for separator, 18... Centrifugal separator, 19... Supply hender piping, 20... Light component-\inter piping, 21... Ivy piping to city component, 22...Pressure elbow for looking down, 23...
Casing', 24...Rotating body, 25...Open ITI
Part, 26... Magnet, 27... Partition plate, 28... Magnet, 29... Lower bearing, 3o... Air supply pipe, 31...
Light component extraction pipe, 32...R positive component extraction pipe, 33...Motor rotor, 34...Motor stator, 35...Damper chamber. Figure 7! Figure 3

Claims (1)

[Claims] 1. A casing that maintains an internal state of negative pressure, a rotating body that rotates at high speed within the casing, an upper bearing and a lower bearing that support the rotating body, and an opening that passes through the casing and is located near the central axis of the rotating body. is inserted into the rotating cylinder through the
The separation element is a centrifugal separator having an air supply pipe for supplying the gas to be separated and a discharge pipe for extracting the separated light component gas and heavy component gas, and multiple centrifuges are arranged in a cascade. multiple connected cascade devices,
A gas generator that generates gas to be separated, and a gas generator K
A supply device that supplies the gas to be separated to a constant pressure and a predetermined flow rate to the cascade device, and a light component collection and recovery device that collects the light component gas and heavy component gas separated by the cascade device, respectively, and the heavy component gas. In a method for detecting an abnormality in a gas separation device consisting of a collection and collection device, the pressure at the center of the rotating body of a centrifuge provided at the light component gas outlet portion of the cascade device or the pressure at the center of the rotating body and the area surrounded by the outside of the rotating body and the casing is determined. A pressure gauge is provided to measure the pressure, and the measurement values of this pressure gauge, the pressure M1 and flow meter installed in the supply device, and the pressure gauges installed in the light component and heavy component collection device are measured. A specially developed method for detecting abnormalities in gas separation equipment that uses logical judgments based on values to detect abnormalities in gas separation equipment and identify areas where abnormalities occur.