The regeneration method of the charge of the air cleaning unit or artificial breathing gas environment

 

(57) Abstract:

The invention relates to the field of chemical technology, in particular to methods of regeneration of catalysts and adsorbents for the recovery of their properties. Regeneration of the mixture containing the catalyst and the adsorbent, the air cleaning unit or artificial breathing gas environment is carried out by blowing air or air-gas mixture that does not contain catalyst "poisons", at 100 to 220oWith the specific rate of 0.2-1.0 l/(mins2within 40-55 hours Blowing is carried out at normal or reduced pressure, equal 300-600 mm RT.article The regeneration method can be used to restore the properties of the catalyst and adsorbent mixture of blocks and air filters or artificial breathing gas environment directly on the object without dismantling and recharge. 1 C.p. f-crystals.

The invention relates to the field of chemical technology, in particular to methods of regeneration of catalysts and adsorbents charge of the cleaning unit, and can be used to restore the properties of the catalyst based on palladium, providing the oxidation of carbon monoxide to dioxide, and particulate adsorbent of harmful substances.

m or increased pressure of carbon monoxide based on the oxidation of CO to CO2at the palladium catalyst of the type AK-62, and from such waste products like ammonia, hydrogen sulfide, hydrocarbons and other harmful substances by absorption of solid adsorbents, such as cuprite.

The palladium catalyst is very effective in a wide range of relative humidity of the gas environment (up to 99%), at normal and elevated temperatures (up to 100oC) and in large intervals volumetric velocity of the purified gas.

However, the catalyst activity is reduced by the presence in the gas environment, the so-called catalyst "poisons", which include ammonia, hydrogen sulfide and other substances. Therefore, to ensure the efficient operation of palladium catalyst in air filters and artificial gas environment need to be protected from its harmful toxic substances. As a means of protection from the catalyst "poisons" is used supramid, which not only provides protection palladium catalyst "poisons", but at the same time cleans the gas environment from harmful for human breathing substances.

Activity Capranica cleaning gas environment from harmful substances with increasing operating time decreases, which entails pereterli solid adsorbent, for example zeolite, mainly in dehumidifiers by heating the adsorbent by blowing hot air with an initial temperature of 230-300oC with subsequent cooling of the cartridges in an airtight container (Klimov, L. N., Obukhov N. I. and Belinsky, S. P. Method of regeneration of the solid adsorbent. A. C. 502644 from 06.09.74).

The disadvantages of this method of recovery adsorption properties are low efficiency, large energy consumption of the process and regeneration time.

There is a method of regeneration of the palladium catalyst on the carrier for deep oxidation of organic substances, including processing chemical reagent - aqueous alkaline oxidizing solution (and.with. 1300713, class B 01 J 23/96, 1992), as well as the regeneration method of the aluminum-palladium catalyst used for the hydration of acetylene hydrocarbons in the process of refining hydrocarbon, C4different degrees of saturation from acetylene hydrocarbons by treatment of the catalyst attivazione mixture containing 0.5 - 5% oxygen at 260 - 350oC, followed by reduction with hydrogen (SU and.with. 801875, class B 01 J 23/96, 1981).

As can be seen from the technical solutions known methods include reg the Task, on the solution of the invention, is in the process of regeneration at the same time and catalyst and adsorbent by a purge air or gas-air mixture under certain conditions, the catalyst and the adsorbent should be considered as part of one batch of the air cleaning unit or artificial breathing gas environment.

The proposed method of recovery is that the recovery of palladium catalyst is carried out simultaneously with the adsorbent of harmful substances (copromotor) by blowing through the purification filter (without discharge) air or air-gas mixture that does not contain catalyst "poisons", at 100 220oC with the specific flow rate of 0.2 - 1.0 l/(mins2within 40-55 hours While purging is carried out at atmospheric or reduced pressure, equal 300-600 mm RT. Art. carrying out the process under reduced pressure increases the regeneration efficiency and reduces the time to restore the activity of the catalyst and adsorbent.

This method can be used for regeneration of the charge units and air filters and artificial breathing gas mixtures directly naoka and filter air cleaning or artificial gas environment from carbon monoxide and harmful substances on the object, and saves the expensive helium and reduces the likelihood of leakage due to a sharp reduction in the number of labor-intensive recharge units high pressure.

The application of the proposed method increases the service life of the catalyst and the adsorbent of harmful substances due to their frequent use in long-term operation.

In addition, this method of regeneration of the catalyst and the adsorbent of harmful substances increases the efficiency and reliability of the block or filter cleaning air or breathing gas environment from harmful substances, which is especially important to ensure that people are staying on objects at normal and elevated pressures.

1. The regeneration process of the mixture containing the catalyst and the adsorbent, the air cleaning unit or artificial breathing gas environment from carbon monoxide and harmful substances, which consists in the fact that the regeneration is carried out by blowing air or gas-air mixture at 100 - 200oWith the specific rate of 0.2 - 1.0 l/(mins2) during the 40 55 PM

2. The method according to p. 1, characterized in that the blowing is carried out at atmospheric pressure or reduced pressure, equal to 300 - 600 mm RT.article

 

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4 ex

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1 tbl, 13 ex

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22 cl, 2 tbl, 16 ex

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3 cl, 2 tbl, 6 ex

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18 cl, 11 tbl, 46 ex, 10 dwg

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