JPH0780234A - Rotary type gas separating apparatus - Google Patents

Abstract

PURPOSE:To improve the durability and gas sealing properties of a rotary sliding part by lining either one of sliding face of a valve plate or an adsorption apparatus with a wear resistant resin, inserting an intermediate material made of a polymer material different from the resin lining between the wear resistant resin lining and one of the base materials of valve plate and the adsorption apparatus, and bonding the intermediate material to them. CONSTITUTION:A rotary type gas separation apparatus has an adsorption apparatus which has a plurality of partitioned chambers partitioned in circumferential direction and a valve plate 4 which is provided with two or more ports and brought into contact with the adsorption apparatus and the separation apparatus carries out continuous gas treatment by relative rotation of the valve plate 4 and the adsorption apparatus. In the rotary type gas separation apparatus, either one sliding face 16 of the valve plate 4 or the adsorption apparatus is lined with a wear resistant resin 18, an intermediate material 17 made of a polymer material different from the resin lining 18 and formed into a monolayer or a multilayer body is inserted between the resin lining material 18 and either one of base materials of the valve plate 14 or the adsorption apparatus, and it is bonded to them. As a result, the durability and gas sealing properties of the rotary sliding part are improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure swing type rotary gas separation device for separating a specific gas from a mixed gas by adsorption and releasing the adsorbed gas.

[0002]

2. Description of the Related Art Gas recovery equipment (solvent recovery equipment, CO₂Times
Collection device) and gas separation device (N₂, O ₂Generator etc.)
Then, a pressure swing type gas separator is used. Figure 2
Fig. 4 shows a conventional pressure swing type gas recovery device.
You The raw material gas is boosted by the blower 13 and is supplied to the lower valve plate.
From the raw material gas port 8 of No. 4, it is supplied to the adsorption tower 1. This
The adsorption tower 1 is divided into a plurality of compartments 2 in the circumferential direction by the partition plate 3.
The gas supplied to the compartment 2 is divided into
The adsorbent filled in the same compartment 2 selectively features
The constant gas is adsorbed, and the gas not adsorbed is the upper valve plate 5.
It is discharged as a purified gas via the port 9 of.

With the rotation of the adsorption tower 1, the compartment 2 in which the specific gas is adsorbed moves away from the raw material gas port 8 of the lower valve plate 4. Then, subsequently, the new compartment filled with the regenerated adsorbent adsorbs the specific gas from the gas supplied to the raw material gas port 8 and discharges the purified gas.

On the other hand, the compartment 2 that has been adsorbed with the specific gas and has moved away from the raw material gas port 8 comes into communication with the specific gas recovery port 7 of the lower valve plate 4 as the adsorption tower 1 rotates. The specific gas that has been adsorbed by being decompressed by the vacuum pump 14 connected to the port 7 is desorbed and recovered, and the adsorbent is also regenerated, so that a new state in which the specific gas can be adsorbed is restored. At this time, in order to facilitate desorption of the specific gas, the purified gas is supplied as the purge gas from the purge gas port 10 of the upper valve plate 5.

The adsorption tower 1 is rotated by a drive shaft 6 via a key 15. A detent 11 is provided to prevent the upper and lower valve plates 4 and 5 from moving around with the adsorption tower 1. By the way, the surface where the rotating adsorption tower 1 is in contact with the valve plates 4 and 5 is a sliding surface 16 having a sealing action to prevent gas leakage between them, and in order to improve the sealing performance,
A load is applied to the sliding surface 16 by the spring 12 so as to reduce the gap on the sealing surface.

[0006]

The sliding surface 16 between the rotating adsorption tower 1 and the valve plates 4 and 5 is a dry surface, and a small load (contact pressure) is applied in the normal combined state of carbon steel and low alloy steel. In this case, seizure and abnormal wear occur, which causes problems such as an increase in gas leak amount and device stoppage. For this reason, methods such as reducing the load (contact pressure) and combining materials with excellent dry slidability are adopted, but when the amount of treated gas increases, the adsorption tower diameter and valve plate diameter increase. As a result, the flatness cannot be obtained because the processing accuracy of the sealing surface is reduced. Therefore, if the load (surface pressure) is reduced, the seal gap on the sliding surface cannot be reduced, and the gas leak amount cannot be kept to an allowable value.

Further, when resin materials such as Teflon having good dry slidability are used, these resin materials are bonded to the base material with an adhesive, but the temperature rise due to frictional heat generation of the sliding surface. Due to the influence, there is a drawback that thermal stress is repeated due to the difference in linear expansion coefficient between the resin material and the base material, the adhesive layer peels off early, and gas leaks from there.

It is an object of the present invention to provide a rotary gas separation device capable of improving the durability and gas tightness of a rotary sliding portion and easily manufacturing a large size one.

[0009]

The present invention has an adsorber having a plurality of compartments partitioned in the circumferential direction, and a valve plate having two or more ports and abutting against the adsorber. However, in order to solve the above-mentioned problems in the rotary gas separation device that continuously processes the gas by the relative rotation of the valve plate and the adsorber, at least one sliding surface of the valve plate and the adsorber is resistant. At least one of the valve plate and the adsorber is provided with an intermediate member which is provided with a wear resin lining and is formed of a polymer material such as resin, plastic, rubber or the like different from the resin lining in a single layer or a laminated state. The base material and the wear resistant resin lining material are inserted and bonded.

The coefficient of linear expansion of this intermediate member is smaller than that of the surface sliding material, but larger than that of the base material, and the longitudinal elastic coefficient of the intermediate material is the longitudinal elastic coefficient of the surface resin material. It is preferable to approach

[0011]

The function of the adhesive layer fatigue peeling when a resin material having good slidability is lined must first be solved by suppressing the temperature rise which is the cause. For this purpose, it is required to reduce the load (contact pressure) on the sliding surface. In this case, however, there is a problem that the conventional method cannot reduce the seal gap. However, in the present invention, since a polymer-based intermediate member (having a small longitudinal elastic coefficient) that causes large elastic deformation under a small load is inserted between the wear-resistant resin lining material and the base material, the processing accuracy is reduced. Due to this, the increased seal gap can be reduced with a small load, and the rise in the temperature of the lining material is suppressed, and peeling is prevented.

However, if the linear expansion coefficient of the intermediate member is the same as that of the wear-resistant resin lining material on the surface, the thermal stress between the base materials increases due to the increase in the lining thickness including the intermediate member, and the temperature rises. The effect of suppressing is completely lost. Therefore, if the linear expansion coefficient of the intermediate member is made smaller than that of the lining material on the surface and larger than that of the base material, the thermal stress due to the increase in thickness acts more than the increase in thermal stress. It is also preferable to make the longitudinal elastic modulus of the intermediate member close to that of the wear-resistant resin material on the surface because it acts in the direction of reducing thermal stress.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotary gas separation device according to an embodiment of the present invention will be specifically described below with reference to the drawings. The entire structure of the rotary gas separation apparatus according to this embodiment is the same as that of the conventional apparatus shown in FIGS. 2 to 4, and therefore redundant description will be omitted. The lining portion of the lower valve plate 4 in this embodiment is shown in a partially enlarged sectional view in FIG. First, an adhesive (for example, a two-component epoxy adhesive) is used to attach a resin material 18 having excellent wear resistance to the intermediate member 17.
The lower valve plate 4 is bonded to the base material of the lower valve plate 4. The adhesive layer 19 has a thickness that maximizes shear strength.

The resin material 18 to be the abrasion resistant resin lining on the surface is a material having excellent abrasion resistance and seizure resistance in a dry sliding state (for example, aromatic polyester resin and PTFE.
(Filled with), the minimum thickness was taken into consideration in consideration of wear life. Here, the intermediate member 17 is made of a resin material having a single layer (for example, polyether sulfone which is a thermoplastic heat resistant resin) having a high elastic deformability without considering wear resistance and seizure resistance at all. Although it is used, a laminate of different materials can be used.

For example, even if a material having a large longitudinal elastic modulus and a small elastic deformability is used, if the adhesive strength between the lower valve plate 4 and the base material can be increased, it is made thin and the intermediate member 17 is used.
It is also possible to use it as the space 17 between the intermediate members by adhering to. The above is similarly applied to the upper valve plate 5. In the above embodiment, the adsorption tower 1 is rotated and the valve plates 4 and 5 are stationary, and the abrasion resistant resin lining is provided on the valve plate which is easy to maintain. The case of application to the plate rotating type can be performed in exactly the same manner as this embodiment.

As described above, since the wear resistant resin lining material is applied to the surface and the polymer-based intermediate member is put under the lining material, the seal gap is reduced due to the elastic deformation of the intermediate member, and the sliding surface pressure is reduced. Can be made smaller, and peeling of the lining material due to temperature rise can be prevented. The present invention has been specifically described above based on the illustrated embodiments, but the present invention is not limited to these embodiments, and within the scope of the present invention set forth in the claims, various shapes and structures can be used. It goes without saying that changes may be made. For example, in the above embodiment, the wear-resistant resin lining material is provided on the valve plate, but it may be provided on the sliding surface of the adsorption tower, or it may be provided on both sliding surfaces of the valve plate and the adsorption tower. Good.

[0017]

As described above in detail, according to the present invention, the wear resistance resin lining and the intermediate member are used, and the durability and gas sealing of the rotary sliding portion, which have been problems of the rotary gas separator, have been solved. It is possible to improve the sex. Further, conventionally, when the size is increased, special processing (such as hand finishing) is required so as not to reduce the processing accuracy of the sliding surface, that is, the sealing surface. The cost can be reduced by machining.

[Brief description of drawings]

FIG. 1 is a partially enlarged vertical cross-sectional view of a wear-resistant resin lining portion in a rotary gas separator according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a conventional rotary gas separator using a pressure swing.

3 is a sectional view taken along the line AA of FIG.

4 is a sectional view taken along the line BB of FIG.

[Explanation of symbols]

 1 adsorption tower 2 division chamber 3 partition plate 4 lower valve plate 5 upper valve plate 6 drive shaft 7 specific gas recovery port 8 raw material gas port 9 purified gas discharge port 10 purge gas port 11 whirl stop 12 spring 13 blower 14 vacuum pump 15 key 16 Sliding surface 17 Intermediate material 18 Surface resin material 19 Adhesive layer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiichiro Ogawa 2-5-1, Marunouchi, Chiyoda-ku, Tokyo Sanryo Heavy Industries Co., Ltd.

Claims (1)

[Claims] 1. An adsorber having a plurality of compartments partitioned in the circumferential direction, and a valve plate having two or more ports and abutting on the adsorber, the valve plate and the adsorption plate In a rotary gas separation device for continuously performing gas treatment by relative rotation of a vessel, an abrasion resistant resin lining is applied to at least one sliding surface of the valve plate and the adsorber, and the resin lining is An intermediate member formed of a different type of polymer material as a single layer or a laminated state is inserted and bonded between at least one of the base material of the valve plate and the adsorber and the wear resistant resin lining material. Rotating gas separator.