Recycling method of naturally volatile ammonia gas

Abstract

The invention relates to a recycling method of naturally volatile ammonia gas. The method comprises the following steps that in a finished product ammonium hydroxide storage process, part of the ammonia gas diffuses into the air from ammonium hydroxide, pressure of the ammonia-containing air above ammonium hydroxide tanks builds up to generate positive pressure, and under the action of differential pressure, the ammonia-containing air flows in a direction of an atmospheric spraying absorption tower and enters the spraying absorption tower from the tower bottom of the spraying absorption tower;the ammonia-containing air goes up from an inlet of the tower bottom, and meanwhile, soft water is sprayed from the tower top to make the ammonia-containing air and the soft water subjected to countercurrent contact; in a countercurrent contact process, ammonia gas in the ammonia-containing air is completely dissolved in water and falls to the tower bottom along with liquid, so that purified airgoes up continuously to the tower top for emptying; after absorbing the ammonia gas, the soft water on the tower bottom is fed back to the tower top again through a circulating pump, and added again for purifying ammonia-containing air. According to the recycling method of the naturally volatile ammonia gas, the ammonia gas which diffuses above the finished product ammonium hydroxide tanks is effectively collected to form dilute waste ammonium hydroxide liquid, in-organization diffusion is prevented, and the dilute waste ammonium hydroxide liquid is used for carbonizing the soft water of a system, so that resources are reasonably used.

Description

technical field [0001] The invention relates to a recycling method for naturally volatilized ammonia gas, belonging to the technical field of waste gas treatment. Background technique [0002] During the product storage process of the synthetic ammonia industry, the ammonia gas absorbed in the finished ammonia water tank is easy to diffuse into the air at the top of the tank. This part of the naturally volatilized ammonia gas is produced slowly and will accumulate in the ammonia water tank to cause positive pressure. If it is not collected and treated, waste gas will be diffused indiscriminately; if the air is introduced to the waste gas treatment device, an induced air flow will be generated in the ammonia water tank, or even a slight negative pressure, which will accelerate the overflow of ammonia gas in the ammonia water, which is not conducive to the safety of the product stability. Contents of the invention [0003] Aiming at the above-mentioned technical problems o...

AI Technical Summary

Problems solved by technology

If it is not collected and treated, it will diffuse indiscriminately to generate waste gas; if the air is introduced to the waste gas treatment device, an induced air flow will be generated in the ammonia water tank, or even a slight negative pressure, which will accelerate the overflow of ammonia gas in the ammonia water, which is not conducive to the safety of the product stability

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