Raw material air pretreatment method

Abstract

The invention discloses a raw material air pretreatment method. The method comprises the following steps: (1) air enters a packed tower from a side line at the bottom of the packed tower, high-temperature water is fed from a side line at the tower top of the packed tower and directly contacts the air in the packed tower, and then water washing purification and preheating are carried out on the air; and (2) the water after washing is heated by circulating hot water in a device or other low-temperature heat sources and then is returned to the packed tower. According to the invention, the air isdirectly subjected to countercurrent water washing with a large amount of the high-temperature water-washing water, so that the temperature and humidity of the air are improved, impurities such as dust and the like are removed, and effects of preheating, humidifying and purifying are achieved; in addition, in a direct preheating process of the air and the water-washing water, the content of saturated vapor in the air is gradually increased along with gradual increase of the temperature of the air, so that the humidity of the air is also increased accordingly; and meanwhile, high-temperature circulating water or condensate water is adopted for the water-washing water of the air, so that energy consumption required by heat dissipation of the high-temperature circulating water or cooling of the condensate water is saved, energy consumption required by air preheating is also saved, and a part of water resources are recycled.

Description

technical field [0001] The invention relates to the technical field of gas pretreatment, in particular to an air pretreatment method. Background technique [0002] Air refers to the mixed gas in the earth's atmosphere. It is transparent, colorless and odorless. It is mainly composed of inert gases, oxygen, and water vapor. It is not only the "life gas" that animals and plants breathe every day, but also plays a role in human survival and production. Significant influence. Oxygen in the air is a common strong oxidant due to the wide availability of air raw materials, so air is often used directly as a raw material for production. [0003] The oxidation process in the chemical production process, such as the partial oxidation of propylene to acrolein, the oxidation of acrolein to acrylic acid, the oxidation of n-butane to produce maleic anhydride, etc., requires a large amount of hot air to be used as a direct reaction raw material, and a certain amount of A large amount of ...

AI Technical Summary

Problems solved by technology

In summer, the temperature is high and the air humidity is high, which can be achieved in some areas, but in winter, the temperature is low and the climate is dry, and a large amount of water needs to be added for humidification, usually adding steam, which will increase energy costs for the factory

In addition, impurities such as dust entrained in the air are also easy to accumulate in the reaction system, which will have a certain impact on the reaction system.

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