JP2001149732A - Gas adsorption device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas adsorption device high in gas removing ratio with simple structure. SOLUTION: The air passed through an adsorption zone 2 of a first gas adsorption rotor 1 is sent to an adsorption zone 5 of a second gas adsorption rotor 4, a desorption zone 7, prezone 6 and a purge zone 8, and the air gone out the adsorption zone 5 of the second gas adsorption rotor 4 is supplied as producing air, and the air gone out the prezone 6 and the purge zone 8 of the second gas adsorption rotor 4 are sent to the desorption zone 7 of the second gas adsorption rotor 4 through a first heater 10, and the air gone out the desorption zone 7 of the second gas adsorption rotor 4 is sent to the desorption zone 3 of the first gas adsorption rotor 1 through a second heater 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas sorption device such as a dehumidifier and an organic solvent vapor concentrator, and particularly to a low dew point air supply device for an organic solvent vapor concentrator when applied to a dehumidifier. In the case of applying to the air, high-purity air can be supplied.

[0002]

2. Description of the Related Art Conventionally, a gas sorption device has been used for dehumidification, concentration and removal of organic solvent vapor, and various improvements have been made so that air having a lower dew point or air having a higher degree of cleanliness, that is, a gas removal rate can be increased. Have been.

[0003] Among such devices, a honeycomb rotor type gas sorption device in which an adsorbent or an absorbent is supported on a honeycomb body (honeycomb) has been widely used in recent years.

In order to increase the gas removal rate of such a honeycomb rotor type gas sorption device, a plurality of honeycomb rotors are provided and a plurality of honeycomb rotors are attached and collected, or the same air to be treated is repeatedly applied to the same honeycomb rotor. The gas in the air is adsorbed a plurality of times.

For example, Japanese Patent Application Publication No. 61182/1986
The device disclosed in Japanese Patent Laid-Open Publication No. 1 (1999) uses two dehumidifying rotors, and further provides a purge for both of the two dehumidifying rotors to supply air having an extremely low dew point.

[0006]

However, the conventional dehumidifier has a problem that if the dew point of the supply air is to be lowered, the air flow is complicated, a large number of blowers are required, and the energy consumption is large. .

The present invention has been made in view of the above points, and has as its object to provide a gas sorption device having a very simple structure and a high gas removal rate.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention uses air passing through an adsorption zone of a first gas adsorption rotor, an adsorption zone, a pre-zone, and a purge zone of a second gas adsorption rotor. To supply the air exiting the adsorption zone of the second gas adsorption rotor as product air,
The air that has exited the pre-zone and purge zone of the second gas adsorption rotor is sent to the desorption zone of the second gas adsorption rotor via the first heater, and the air that has exited the desorption zone of the second gas adsorption rotor is sent to the second zone. It was sent to the desorption zone of the first gas adsorption rotor via two heaters.

[0009]

DETAILED DESCRIPTION OF THE INVENTION According to the first aspect of the present invention, a first gas adsorption rotor is divided into an adsorption zone and a desorption zone, and the second gas adsorption rotor is divided into an adsorption zone, a desorption zone, and a pre-zone. And a purge zone, and the air that has passed through the adsorption zone of the first gas adsorption rotor is sent to the adsorption zone, pre-zone, and purge zone of the second gas adsorption rotor, and the adsorption zone of the second gas adsorption rotor is The discharged air is supplied as product air, and the air that has left the pre-zone and the purge zone of the second gas adsorption rotor is sent to the desorption zone of the second gas adsorption rotor via the first heater, and the second gas adsorption is performed. The air that has exited the desorption zone of the rotor is sent to the desorption zone of the first gas adsorption rotor via the second heater, and the first gas adsorption rotor performs primary dehumidification (purification).
The degassed air is further dehumidified (purified) by the second gas adsorption rotor, and the air preliminarily dehumidified (purified) by the first gas adsorption rotor pre-purges and purges the second gas adsorption rotor. Therefore, it has the effect of increasing the desorption / adsorption effect.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the gas sorption device according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a flow chart of the gas sorption device of the present invention. First, a case where a dehumidifier is used as the gas sorption device will be described.

Reference numeral 1 denotes a first gas adsorption rotor, which has a honeycomb body carrying silica gel or hydrophilic zeolite. The first gas adsorption rotor is divided 3: 1 into an adsorption zone 2 and a desorption zone 3 by a sealing means (not shown). Here, the technology for dividing the gas adsorption rotor by the sealing means is described in Utility Model Application Publication No.
Since it is publicly known in, for example, Japanese Patent Publication No. 93, the description is omitted.

Reference numeral 4 denotes a second gas adsorption rotor, which is also a first gas adsorption rotor.
As in the case of the gas adsorption rotor 1, the honeycomb body carries silica gel or hydrophilic zeolite. Then, the second gas adsorption rotor 4 is sealed to the adsorption zone 5, the pre-zone 6, the desorption zone 7 and the purge zone 8 by the sealing means in a ratio of 4: 1:
It is divided into 2: 1.

The second gas adsorption rotor 4 has twice the thickness of the first gas adsorption rotor 1. The first gas adsorption rotor 1 and the second gas adsorption rotor 4 are each driven to rotate by a motor (not shown).

Reference numeral 9 denotes a cooler, which is cooled by a refrigerator. One-sixth of the air exiting the adsorption zone 2 of the first gas adsorption rotor 1 is branched and sent to the pre-zone 6 of the second gas adsorption rotor 4. 5/6 of the air leaving the adsorption zone 2 of the first gas adsorption rotor 1 passes through a cooler 9.

One sixth of the air passing through the cooler 9 is sent to the purge zone 8 of the second gas adsorption rotor 4, and 4/6 of the air passing through the cooler 9 is sent to the adsorption zone 5.

The air exiting the pre-zone 6 and the purge zone 8 of the second gas adsorption rotor 4 passes through the first heater 10 and is sent to the desorption zone 7 of the second gas adsorption rotor 4. The air that has left the desorption zone 7 of the second gas adsorption rotor 4 passes through the second heater 11 and passes through the first gas adsorption rotor 1.
To the desorption zone 3.

Reference numerals 12 and 13 denote blowers.
Is the adsorption zone 2 of the first gas adsorption rotor 1
, And the blower 13 sucks air from a flow path that ends in the desorption zone 3 of the first gas adsorption rotor 1.

The dehumidifier configured as described above operates as follows. First, the air to be treated is sent to the adsorption zone 2 of the first gas adsorption rotor 1 by the blower 12. Here, the air to be treated is primarily dehumidified, branched as described above, and 1/6 is sent to the pre-zone 6 of the second gas adsorption rotor 4.

The temperature of the air leaving the adsorption zone 2 rises due to the heat of adsorption. In particular, in the case of primary dehumidification, the humidity of the air to be treated may be high, and in this case, the temperature of the air exiting the adsorption zone 2 increases. The prezone 6 is heated by the high temperature air.

5/6 of the air leaving the adsorption zone 2 passes through the cooler 9 to lower the temperature, and 4/6 is sent to the adsorption zone 5 where it is subjected to secondary dehumidification. In this secondary dehumidification, since the temperature is lowered, adsorption is effectively performed, and the air leaving the adsorption zone 5 can lower the dew point temperature to -70 ° C.

One-sixth of the air leaving the adsorption zone 2 passes through the cooler 9 and is sent to the purge zone 8 of the second gas adsorption rotor 4. Since the temperature of the air sent to the purge zone 8 is lowered by the cooler 9, the temperature of the second gas adsorption rotor 4 is sufficiently lowered in the purge zone 8, and the temperature of the second gas adsorption rotor 4 becomes low, and the temperature of the second gas adsorption rotor 4 becomes low. Moving. Therefore,
For this reason, the secondary dehumidification in the adsorption zone 5 is effectively performed.

The temperature of the air exiting the pre-zone 6 and the purge zone 8 has risen,
Heat at 0 and send to desorption zone 7. The second gas adsorption rotor 4 is desorbed by this high-temperature air.

The second gas adsorption rotor 4 is used for secondary dehumidification of air that has already been primary dehumidified by the first gas adsorption rotor 1, and the amount of adsorbed moisture is small.
The moisture content of the air leaving the desorption zone 7 is not so large.

Therefore, the air having a slightly lower temperature after passing through the desorption zone 7 is passed through the second heater 11, and the temperature is further raised and passed through the desorption zone 3 of the first gas adsorption rotor 1. The first gas adsorption rotor 1 is desorbed by the high-temperature air.

In the above example, the dehumidifier has been described. However, by carrying hydrophobic zeolite or activated carbon on the honeycomb bodies of the first gas adsorption rotor 1 and the second gas adsorption rotor 4, the organic solvent vapor is concentrated and removed. It can be a device.
In this case, the operation is similar to that described above.

[0026]

Since the gas sorption device of the present invention is constructed as described above, the flow of the air to be treated and the flow of the desorption air can be combined into two systems. Therefore, all air flows can be covered by only two blowers, and the structure is simplified.

Further, in the gas sorption device of the present invention, the air is cooled by the cooling device before being sent to the adsorption zone, the desorption zone and the purge zone of the second gas adsorption rotor. The adsorption becomes effective and the gas removal rate increases.

Since the second gas adsorption rotor is thicker than the first gas adsorption rotor, both rotors can be completely attached and detached. In other words, when performing the desorption of the first gas adsorption rotor having a relatively large amount of adsorption, the temperature of the high-temperature air drops rapidly in the desorption zone. There is no remains. On the other hand, the second gas adsorption rotor has a small amount of adsorption, has a small temperature drop in the desorption zone of high-temperature air, and has no desorption residue even if the thickness of the rotor is increased.

Further, the gas sorption device of the present invention divides the first gas adsorption rotor into an adsorption zone and a desorption zone at a ratio of 3: 1 and divides the second gas adsorption rotor into an adsorption zone, a pre-zone, a desorption zone and a purge zone. Since the diameters of the first gas adsorption rotor and the second gas adsorption rotor are the same, the area of the adsorption zone of the first gas adsorption rotor and the area of the first gas adsorption rotor are equal to each other. The total area of the adsorption zone, the pre-zone and the desorption zone of the second gas adsorption rotor becomes equal. Therefore, when the diameters of the first gas adsorption rotor and the second gas adsorption rotor are the same, the surface wind speeds of the respective parts match. That is, the diameters of both gas adsorption rotors can be made equal, and the whole system can be easily assembled.

Then, the temperature of the second gas adsorption rotor is raised by passing the air whose temperature has risen due to the heat of adsorption of the first gas adsorption rotor through the pre-zone of the second gas adsorption rotor, thereby wasting energy. Few.

[Brief description of the drawings]

FIG. 1 is a flowchart showing Embodiment 1 of a gas sorption device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st gas adsorption rotor 2 adsorption zone 3 desorption zone 4 2nd gas adsorption rotor 5 adsorption zone 6 pre-zone 7 desorption zone 8 purge zone 9 cooler 10 first heater 11 second heater 12, 13 blower

Claims (3)

[Claims] A first gas adsorption rotor divided into an adsorption zone and a desorption zone; and a second gas adsorption rotor divided into an adsorption zone, a desorption zone, a pre-zone, and a purge zone. And the air that has passed through the adsorption zone of the first gas adsorption rotor is sent to the adsorption zone, pre-zone and purge zone of the second gas adsorption rotor,
The air exiting the adsorption zone of the second gas adsorption rotor is supplied as product air, and the air exiting the pre-zone and purge zone of the second gas adsorption rotor is supplied to the second gas adsorption rotor via the first heater. The air that has been sent to the desorption zone of the second gas adsorption rotor and has exited the desorption zone of the second gas adsorption rotor is supplied to the first heater via the second heater.
A gas sorption device, wherein the gas is sent to a desorption zone of a gas adsorption rotor. 2. The gas sorption device according to claim 1, wherein air is cooled by a cooling device before being sent to an adsorption zone, a desorption zone, and a purge zone of the second gas adsorption rotor. 3. The gas sorption device according to claim 1, wherein the second gas adsorption rotor is thicker than the first gas adsorption rotor.