Pollution-free gas drying agent and drying method thereof

Abstract

The invention relates to a pollution-free gas drying agent which has high dehumidifying efficiency, slow dissolving speed and no pollution after dissolution, and can be directly dissolved in water to be exhausted to the environment, and a drying method thereof. The method comprises the steps that: wet air enters through an inlet which is positioned in the center of the bottom of a dryer container, so that the compressed air is uniformly distributed and flows upwards through the uniform diversion of a splitter plate, and the air is fully contacted with a moisture-absorbing agent layer; the wetair is firstly contacted with the moisture-absorbing agent layer in a reaction zone, and the moisture-absorbing agent absorbs plenty of water in the wet air, so that the moisture-absorbing agent undergoes chemical reaction; the wet air enters a drying zone of the moisture-absorbing agent layer, and the moisture-absorbing agent further dries the wet air, so that the dew point of the wet air reaches the required dew point; and finally, the fully dried compressed air is exhausted through an air outlet at the upper end of the container by passing through a preparation area of the moisture-absorbing agent. The dryer of the invention overcomes the defect that the conventional dryer has complex structure, high energy consumption, and environmental pollution, and has the advantages of stable performance, low energy consumption, low cost, no pollution, and low requirement on the working environment.

Description

technical field [0001] The invention relates to a pollution-free gas desiccant and drying method with high dehumidification efficiency, slow dissolution speed, no pollution after dissolution, and can be directly dissolved in water and discharged into the environment. Drying belongs to the field of desiccant manufacture. Background technique [0002] Silica gel adsorbent is a kind of hard, amorphous chain and network structure of silicic acid polymer particles, the molecular formula is SiO2.nH2O, which is a hydrophilic polar adsorbent. It treats the aqueous solution of sodium silicate with sulfuric acid to form a gel, washes it with water to remove sodium sulfate, and then dries to obtain glassy silica gel. It is mainly used for drying, separation of gas mixtures and petroleum components, etc. Silica gel used in industry is divided into two types: coarse pores and fine pores. Under the condition of saturated relative humidity, the adsorption capacity of coarse-porous silica...

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of the above-mentioned adsorbents: none of them can be directly dissolved in water and discharged, causing more or less environmental pollution

The cold dryer equipment integrates capacitors. Its heat exchanger adopts a shell-and-tube heat exchanger. The shell is made of carbon steel. It will be in contact with humid air for a long time and produce rust, which will affect the quality of the finished air at the outlet. The condensed water discharged from it contains oil. , rust, is a kind of pollution to the environment

Its shortcomings: First, the cold dryer includes a circulating refrigeration system, including a refrigerant compressor and a condenser. The refrigerant medium is Freon, which will damage and pollute the environment if it leaks; second, the cold dryer and suction dryer equipment They are all integrated with capacitors, the structure is more complicated, and the workplace has requirements. They can only be installed indoors, and cannot be installed outdoors. When running, they must be managed by special personnel. Complicated; the third is that the pressure dew point of the processed product gas is greatly affected by the inlet pressure, inlet temperature and ambient temperature, that is, the performance is not stable enough

Its disadvantages: First, the equipment of the drying machine is also integrated with capacitors, and it must be managed by special personnel in normal operation. Because the adsorbent needs to be regenerated, it will consume about 10% of the finished gas, which consumes more energy for the long-term operation of the equipment; Second, when the adsorbent reaches a certain working life, all must be replaced. The replaced adsorbent is worthless and will cause chemical pollution to the environment; third, when the equipment fails, professionals must go to the site to deal with it, and the maintenance cost is relatively high; Fourth, the pressure dew point of the finished gas of the equipment is greatly affected by the inlet pressure and inlet temperature, and the performance is not stable enough

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