JPS625007B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an adsorption device, and particularly to an adsorption device suitable for application to an air separation device, a gas separation device, etc.

A conventional adsorption device will be explained using an adsorption device commonly used in an air separation device shown in FIG.

In FIG. 1, two adsorption towers 10a and 10b are installed in parallel and used selectively. Adsorption tower 10a, 1
Conduits 11a and 11b are connected to the top of 0b, and conduits 12a and 12b are connected to the bottom of 0b, respectively. Check valves 13a, 1 are provided in the conduits 11a, 11b.
3b, and the check valve 13c, 1
3d is connected to the conduit 15.
Switching valves 16a, 16b are provided in the conduits 12a, 12b.
The conduit 17 in which the switching valves 16c and 16d are arranged
A conduit 18 is connected to the conduit 18. Between the check valves 13a and 13b of the conduit 14, a conduit 21a for supplying regeneration gas is connected, which is provided with a double-acting cylinder-driven valve 19a that is opened and closed by gas and a heater 20 that heats the regeneration gas. has been done. Valve 19
A regeneration gas supply conduit 21b that branches from the conduit 21a on the upstream side of the heater 20 and is connected to the conduit 21a on the downstream side of the heater 20 has a double-acting cylinder-driven valve 19b that is opened and closed by gas. It is provided. Valve 1
9a, 19b have gas supply conduits 22a, 2.
2b is connected to a solenoid valve 23 that opens and closes with an electric signal.
A gas supply conduit 22c connected to a and 23b
~22f are connected. The regeneration gas pressure regulating device is composed of a pressure regulator 24, a regeneration gas discharge conduit 25, and a pressure control valve 26 provided in the conduit 25 and connected to the pressure regulator 24.
A is provided with a pressure regulator 24 and is connected to a conduit 25. Check valve 13 for conduit 15
Between c and 13d, there is a conduit 27 for delivering purified air.
However, a conduit 28 for supplying raw air is connected between the switching valves 16a and 16b of the conduit 17, and a conduit 29 for exhausting regeneration gas is connected between the switching valves 16c and 16d of the conduit 18. .

Now, the adsorption tower 10a is in the adsorption process, and the adsorption tower 10b is in the adsorption process.
is in the regeneration process, the switching valves 16a, 16
d is opened, the switching valves 16b and 16c are closed, and raw air is supplied to the adsorption tower 10a through the conduits 28, 17, and 12a. In the adsorption tower 10a, impurities such as moisture and carbon dioxide gas (hereinafter abbreviated as impurities) in the supplied raw material air are adsorbed and removed. The purified air from which impurities have been removed is sent out from the adsorption tower 10a via a check valve 13c and through conduits 11a, 15, and 27 to a separate destination. On the other hand, gas is supplied via the conduits 22a and 22d through the open solenoid valve 23a, and the regeneration gas is supplied to the heater 20 via the conduit 21a through the valve 19a, which is opened, and is heated here. Conduit 21 via check valve 13b
It is supplied to the adsorption tower 10b via a, 14, and 11b. The adsorption tower 10b is heated and regenerated with this regeneration gas, and the regeneration gas used for regeneration is passed through the switching valve 16d.
via conduits 12b, 18, 29. After the heating regeneration of the adsorption tower 10b is completed, the valve 19a
is closed by supplying gas through the solenoid valve 23a and through the conduits 22a and 22c, and the valve 19b is closed.
The conduits 22b, 2 are connected via the open solenoid valve 23b.
Gas is supplied through 2f and opened. In this way, when the valve 19a is closed and the valve 19b is opened, the adsorption tower 10b is connected to the conduits 21a and 2 through the valve 19b.
Regeneration gas is supplied through conduits 14, 11b via check valve 13b. The adsorption tower 10b is cooled with this regeneration gas,
The regeneration gas used for cooling is discharged through the conduits 12b, 18, and 29 via the switching valve 16d. When the adsorption tower 10b is cooled to a predetermined temperature, the valve 19
b is closed after gas is supplied through the electromagnetic valve 23b and through the conduits 22b and 22e, thereby stopping the supply of regeneration gas to the adsorption tower 10b and completing the regeneration of the adsorption tower 10b. When the regeneration of the adsorption tower 10b is completed, the switching valves 16b and 16c are opened and the switching valves 16a and 16d are closed, and the impurities in the feed air are adsorbed and removed in the adsorption tower 10b, while the adsorption tower 10a is operated as described above. It is played back by certain operations. In this case, valve 19b is closed and valve 1 is closed.
9a is closed, or conversely, when valve 19a is closed and valve 19b is closed, the pressure of the regeneration gas flowing through conduit 21a increases. This pressure increase is detected by pressure regulator 24 and the pressure is adjusted. At step 24, the pressure regulating valve 26 is operated in the opening direction, and the regeneration gas is released from the conduit 25. Further, the valve 19a is opened while the valve 19b is closed, but conversely, when the valve 19b is opened while the valve 19a is closed, the pressure of the regeneration gas flowing through the conduit 21a decreases. The pressure regulator 24 detects the pressure, and the pressure regulator 24 operates the pressure regulating valve 26 in the closing direction, thereby opening the conduit 25.
The amount of regeneration gas released is reduced or the release is stopped.

In such an adsorption device, the opening/closing speed of the valve that is operated by gas is fast, and the pressure adjustment speed of the regeneration gas pressure regulator cannot follow this opening/closing speed. The disadvantage was that the pressure of the engine fluctuated rapidly, making stable operation impossible.

In addition, a single-acting cylinder type valve may be used as the valve that is opened and closed by gas, but even in this case, the above-mentioned drawbacks still exist.

An object of the present invention is to eliminate the drawbacks of the prior art described above and provide an adsorption device that can be operated stably.

The present invention provides an adsorption device including an adsorption tower that is regenerated with regeneration gas, a valve that is opened and closed by gas to supply and stop the regeneration gas to the adsorption tower, and the regeneration gas that is supplied to the adsorption tower. a pressure regulator that detects the pressure of the regenerating gas, a pressure regulating valve that adjusts the amount of regenerating gas released before the regenerating gas is supplied to the adsorption tower according to a command from the pressure regulator, and when the valve is opened and closed; The gas flow rate control valve adjusts the opening/closing speed of the valve to a speed that can be followed by the opening/closing direction operation speed of the pressure control valve, so that the regeneration gas that is opened and closed by gas is supplied to the adsorption tower. This is an attempt to suppress the rapid pressure fluctuations in the regeneration gas that occur when the valves that supply and stop the gas are opened and closed.

An embodiment of the present invention will be described with reference to FIG. Note that in FIG. 2, the same devices as in FIG.

In FIG. 2, the conduits 22c to 22f include, for example,
Gas flow rate control valves 30a to 30d such as needle valves
are provided for each. Flow rate control valve 30a~
30d indicates the opening/closing speed of the double-acting cylinder-driven valves 19a and 19b, which are opened and closed by gas, and the pressure of the regeneration gas pressure regulating device, which is composed of a pressure regulator 24, a conduit 25, and a pressure regulating valve 26. The adjustment speed can be adjusted to a speed that can be followed.

The opening/closing speed of the valves 19a, 19b is
Supply to the valves 19a and 19b at such a speed that the pressure regulator 24 can detect the pressure fluctuation of the regeneration gas that occurs when opening and closing the regeneration gas 9b, and the pressure regulator 24 can operate the pressure regulating valve 26 in the closing direction and the opening direction. The flow rate of the gas is adjusted by gently decreasing and increasing the flow rate of the gas using the flow control valves 30a to 30d.

In the adsorption device of this embodiment, the opening/closing speed of the valve that is opened and closed by gas can be adjusted to a speed that can be followed by the pressure adjustment speed of the regeneration gas pressure regulator. It is possible to suppress rapid pressure fluctuations in the generated regeneration gas.

In this embodiment, a case has been described in which a double-acting cylinder-driven valve is used as the valve that is opened and closed by gas, but a single-acting cylinder-driven valve may also be used.

As explained above, the present invention provides a flow rate regulating valve that can adjust the opening/closing speed of a valve that is operated by gas to a speed that can be followed by the pressure regulating speed of the regeneration gas pressure regulating device. Since the rapid pressure fluctuation of the regeneration gas that occurs when the valve is opened and closed can be suppressed, the adsorption device can be operated stably.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of a conventional adsorption device, and FIG. 2 is a system diagram showing an embodiment of the adsorption device according to the present invention. 10a, 10b...adsorption tower, 19a, 19b...
...Valves, 21a, 21b, 22c to 22f, 25
... conduit, 24 ... pressure regulator, 26 ... pressure control valve, 30a to 30d ... flow control valve.

Claims (1)

[Claims] 1. An adsorption tower that is regenerated with regeneration gas, a valve that is opened and closed by gas to supply and stop the regeneration gas to the adsorption tower, and a pressure regulator that detects the pressure of the regeneration gas that is supplied to the adsorption tower. a pressure regulating valve that adjusts the amount of regeneration gas released before the regeneration gas is supplied to the adsorption tower according to a command from the pressure regulator; and an opening/closing direction of the pressure regulating valve when the valve is opened or closed. An adsorption device comprising: a gas flow rate control valve that adjusts the opening/closing speed of the valve to a speed that can be followed by an operating speed.