JPS5849437A - Production of cartridge type adsorbent - Google Patents

Abstract

PURPOSE:To improve the strength of adsorbents and to facilitate their handling by omitting molding stages using dies and molding the adsorbents directly by the use of cartridge vessels. CONSTITUTION:Pellet- or bead-like adsorbents are allowed to absorb water up to a satd. state and are then mixed with a binder such as cement. Said mixture is packed directly in cartridge vessels of aluminum or stainless steel without using dies, and is cured. The higher the humidity, the better. The adsorbents molded in such a way are activated by heating to produce final products. Since there is no replacement of the adsorbents from dies to cartridges in such a production stage, there is no failure of the moldings and the cartridge type adsorbents having sufficient strength are obtained easily in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a cartridge-type adsorbent, which is formed by adding a binder to a pellet-like or bead-like adsorbent.

One of the fields of use of adsorbents is as a dehumidifier that adsorbs and removes moisture from the air.

Dehumidifying operations using adsorbents have a long history, including silica gel,
Alumina gel and other materials have been widely used depending on their performance due to their surface porosity and affinity for water. Furthermore, the synthetic zeolite introduced by Linde in 1954 has attracted attention as a new type of moisture absorbent due to its water vapor and moisture absorption properties. Synthetic zeolites used as moisture absorbers are mainly type A zeolites, and the pore diameters vary depending on the substituted cations.

Na* has a pore size of about 4X, KA has a pore size of about 3X, and CaA has a pore size of about 5X. Synthetic zeolite Ru. Zeolite X also includes NaX (13X), CaX (IOX)
) has a substitution type.

These adsorbents are originally in powder form, and are molded using an inert substance as a binder in order to be filled into an adsorption tower as a moisture absorbent, and are often used as pellet- or bead-shaped molded products 1.

The single unit type dehumidifier shown in Figure 1 is used for pressurized air sources such as air brakes of vehicles, instrument air sources, and spray guns. etc. are filled in the inner adsorption layer (2).

The humid air from the compressor (11) passes through the adsorption bed (2), is dehumidified, and is sent to the source air reservoir (4) as dry air.When the pressure approaches the upper limit of the set value (6 to 8/cd) .

Compressor (1) stops. At the same time, the pressurized air inside the device passes through the exhaust device Ql and is released to the atmosphere, and the dry air flowing back from the regeneration air reservoir (3) flows through the adsorption layer (2) to perform regeneration and desorption. When the air in the regeneration air reservoir (4) is consumed, the regeneration is completed.

The pressure of the dry air in the source air reservoir (4) decreases due to consumption, and when it reaches the lower limit of the set pressure, the compressor (1) starts operating. The compressor (1) starts operating, 6. At the same time, the device is sealed and the adsorption operation under pressure starts.
Dry air is sent to the source air reservoir (4). At this time, one part of the dry air is filled into the regeneration air reservoir (31.+51 in Fig. 1. (61, (7), (8) are valves.

(9) is an orifice, and αυ is a conduit communicating with a device using pressurized dry air.

However, when such a dehumidifier is used, for example, for the width of a vehicle, the adsorption layer part vibrates during use, and if the adsorbent is filled with pellets or beads as described above, the adsorbent is There is a risk of it turning into powder. Therefore, most of this type of adsorbent is used in a cartridge type by adding a binder such as cement or clay to a pellet or bead-shaped adsorbent and forming it into a cylindrical shape, for example, and storing it in a special cartridge container.

Conventionally, most of these cartridge-type adsorbents are made of synthetic zeolite (6) or alumina gel, which are made of pellet or bead-like adsorbents, cemented or clay as a binder, and then molded into a cylindrical shape using a mold. The adsorbent was activated, loaded into a cartridge container made of aluminum or stainless steel, and used by installing it in a dehumidifying device as shown in FIG. However, in the conventional method, the molding mold is removed, the molded body inside is taken out and placed in another cartridge container, which is time-consuming and involves many manufacturing steps. There was a risk that the molded body would be damaged during filling.

The inventors of the present invention have conducted extensive research in order to find a method for manufacturing a molded product that improves the above drawbacks, and as a result, the inventors of the present invention have developed a molding process using a mold instead of the conventional method for manufacturing an adsorbent using a mold. By molding directly using a cartridge container.

We have found a method for producing a car that is strong and easy to handle, with at least one simple manufacturing process that prevents damage to IJ-type adhesives.

That is, the present invention provides a method for producing a cartridge-type adsorbent in which a binder is added to a pellet-shaped, bead-shaped, or bead-shaped adsorbent to form the cartridge-type adsorbent. After that, mix the binder.

After filling the mixture into a cartridge container and solidifying it,
The present invention proposes a method for producing a Kerr-ridge type adsorbent, which is characterized by heat treatment.

The present invention will be explained in detail below.

When an adsorbent is left in the atmosphere, it adsorbs moisture in the atmosphere, but the amount of adsorption depends on the storage conditions of the adsorbent, that is, the atmospheric humidity, the length of storage time, etc.

Not constant. Therefore, in order to keep the wetness of the mixture of adsorbent and binder within a certain range, it is necessary to make the amount of moisture adsorbed by the adsorbent constant in advance. let The adsorbent thus absorbed is mixed with a binder such as cement.

Conventionally, cement or clay has been used to form this type of adsorbent, but when clay is used as a binder, it is used to dehydrate clay minerals.

High temperature treatment at 600-700°C is required.

On the other hand, when Portland cement is used as the binder, the cement hardens at room temperature, so heating is performed only to activate the adsorbent, and the treatment temperature is 2.
The temperature may be 0.0 to 300°C.

Therefore, as the binder in the present invention, a binder that can be used in low-temperature processing is appropriate, taking into consideration the suppression of high-temperature oxidation of cartridge containers made of aluminum, stainless steel, etc., and cement is one example. It will be done.

After mixing the adsorbent and binder, the cough mixture is directly poured into a car (made of aluminum or stainless steel, etc.) without using a mold.
After filling the IJudge container, curing is performed. When cured using Shichimen and To as a binder, sufficient strength is developed even at room temperature. Preferably, the higher the humidity, the better! If it is desired to obtain strength in a short period of time (t+-1), it is preferable to perform curing with high temperature steam. After curing, the thus formed adsorbent is activated by heating to produce a cartridge-type adsorbent.

According to the method of the present invention, the manufacturing process for IJ Soji type seed absorbent is significantly shortened, and there is no intermediate step of removing the molded body from the mold and filling it into a cartridge container, so that the molding process can be significantly shortened. There are advantages such as eliminating breakage during rest and improving the yield of the cartridge-type adsorbent, which is a molded product.

Next, the present invention will be explained in more detail with reference to Examples.

Example 1゜Alumina gel and molecular sieve 4A with a diameter of 2vm
each car by a primary operation using a bead)
A prototype adsorbent was produced.

After immersing the adsorbent beads in a container filled with water for 1 hour, they were transferred to a spool of water and drained. Next, this moisture absorbent 10
Ordinary 0 parts by weight to 15 parts by weight? Rutland cement was added and then water was added and kneaded. This mixed wire material was filled into an aluminum cylinder with a 50-mesh stainless steel wire gauze stretched below, and was lightly pressed from above to form the product.

Next, put an aluminum cylinder on it for 20 tons? .

The adsorbent was cured for 19 weeks in an atmosphere with a humidity of 95 - to remove moisture held by the adsorbent and activate it.

Heat treatment was performed at 30″θ°C for 5 hours. After that.

A 50-mesh stainless wire mesh was attached to the top of the aluminum cylinder to complete the production of the cartridge type adsorption agent.

In this way, it was possible to obtain a cartridge-type adsorbent much more easily than with conventional methods, and without damage.

Example 2 The same pressing as in Example 1 was carried out to obtain a molded body of beads of alumina gel and molecular/particle 4A.

20℃ and humidity 9 with the al-'z)ium cylinder attached.
After curing for 24 hours in an atmosphere of 5℃ and then 24 hours in an atmosphere of 8℃ and humidity of 90 to 95℃,
Heat treatment was carried out at 'C for 5 hours. Thereafter, a 507/:L stainless steel wire mesh was attached to the top of the aluminum cylinder, completing the production of the Car-1 trisoji type adsorbent.

In this way, it was possible to obtain a cartridge-type adsorbent with sufficient strength much more easily and in a shorter time than with conventional methods.

As mentioned above, the present invention proposes a method for manufacturing a cartridge-type adsorbent simply and in a short time.
It is industrially useful because it contributes to labor saving.

[Brief explanation of the drawing]

FIG. 1 is an exemplary diagram of a dehumidifying device using a cartridge type adsorbent.

Claims (1)

[Claims] In a method for producing a cartridge-type adsorbent in which a binder is added to a pellet-like or bead-like adsorbent and molded, a binder is mixed after the pellet-like or bead-like adsorbent absorbs water to a saturated state; A method for producing a cartridge-type adsorbent, which comprises filling the mixture into a cartridge container, solidifying the mixture, and then heat-treating the mixture.