Device and method for enhancing purification of organic waste gas by using water vapor

Abstract

The invention discloses a device and method for enhancing the purification of organic waste gas by using water vapor, wherein the device comprises a water vapor supplier, a washing and absorbing liquid sprayer, a condensation nucleus growing absorbing layer, a demisting layer and a recovering tank, and is characterized in that the water vapor provided by the water vapor supplier and the washing and absorbing liquid provided by the washing and absorbing liquid sprayer are used on the condensation nucleus growing absorbing layer so that the water vapor in the gas in the device reaches the saturated or supersaturated state to generate vapor condensation and generate condensation nucleus growth for enhancing the absorption of organic substances in the organic waste gas or condensation nucleus growing tiny moist in the organic waste gas so as to recover organic solvents. Meanwhile, the invention also discloses a method for purifying the organic gas by using the water vapor.

Description

technical field [0001] The invention discloses a device and a method for enhancing the purification of organic waste gas by using water vapor, and more specifically relates to a device and a method for purifying organic waste gas by using a wet scrubbing method and recovering organic solvents at the same time. Background technique [0002] Organic solvents are widely used in daily life and factory production products, and organic solvents are easy to volatilize into gases at room temperature, so they are also called volatile organic compounds (Volatile Organic Compounds, VOCs), and most VOCs have certain effects on the human body. Toxic, must be recycled to reduce harm to the human body; and the organic solvents used in different industries are also different, such as PU (polyurethane, polyurethane) production industry, technology manufacturing industry and lithium battery manufacturing industry, etc. The relevant properties of the various organic solvents mainly used in the...

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Problems solved by technology

[0008] Therefore, due to the traditional condensation recovery method, it is necessary to use refrigeration equipment to control the operating temperature at a relatively low temperature and a long enough residence time to remove VOCs through the condensation mechanism and ensure that the concentration of VOCs contained in the treated exhaust gas reaches the lowest; however, If such a traditional condensation recovery method is applied to an industry with a considerable amount of emissions and a VOCs concentration of only tens to hundreds of PPMv (<<1,000ppmv), in order to achieve high condensation efficiency, it must be reduced to an extremely low temperature (at least below zero 20℃), the energy consumption and equipment maintenance cost will be quite high; therefore, many operators often face the problem of poor recovery efficiency of condensing equipment based on the limitations of traditional condensing system design and the consideration of saving operating costs

[0009] On the other hand, for sub-micron fine mist or particles (such as high-boiling point DOP sub-micron fine mist), there is currently no better and economical method and device, such as the commonly used Venturi scrubber, if To target 0.3μm sub-micron fine mist or particles (about 50% removal efficiency), the required pressure drop must be as high as 35 inches of water column, and the liquid-gas ratio is about 2.0 liters / m3, and its removal efficiency is limited In addition, its operating cost is also quite high

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