Cold and hot type adsorption-desorption device and adsorption-desorption method thereof

Abstract

The invention discloses a cold and hot type adsorption-desorption device and an adsorption-desorption method thereof, belonging to a device and a method for treating organic waste gas. The device comprises an adsorption tank which is provided with an opening used for leading in waste gas and vacuumizing, a clean gas outlet, a tube pass inlet used for leading in cold medium or hot medium and a tubepass outlet used for leading out cold medium or hot medium; the adsorption tank is internally provided with tube arrays which are evenly distributed in the adsorption tank, and the two ends of the tube arrays are respectively communicated with the tube pass inlet and the tube pass outlet; a shell pass of the adsorption tank is internally filled with adsorbing medium which surrounds the tube arrays; and the adsorption tank also carries out low temperature adsorption and high temperature desorption operations. In the invention, the adsorption tank is provided with tube arrays, and cold medium or hot medium can be led into the tube arrays, thus realizing low temperature adsorption and high temperature desorption operations, reducing the level of vacuumizing, saving energy consumption, substantially reducing requirements on the device in the desorption process, improving the adsorption and desorption efficiency, prolonging the service life of the adsorption medium and saving production cost.

Description

technical field [0001] The invention relates to equipment and methods for treating organic waste gas, in particular to a cold-heat absorption-desorption device and an absorption-desorption method thereof. Background technique [0002] At present, the treatment of industrial organic waste gas generally adopts the method of adsorption recovery. Active substances such as activated carbon and activated carbon fiber are filled in the adsorption tank, and the organic waste gas is passed into the adsorption tank for adsorption treatment. The exhaust gas is treated, and its adsorption efficiency is low. When the active material is adsorbed and saturated, the active material needs to be desorbed. In the prior art, water vapor is generally used to clean the active material. However, active materials such as activated carbon and activated carbon fiber have poor waterproof performance. It is greatly reduced, and the desorption liquid still needs to be further separated and processed, w...

AI Technical Summary

Problems solved by technology

When the active material is adsorbed and saturated, the active material needs to be desorbed. In the prior art, water vapor is generally used to clean the active material. However, active materials such as activated carbon and activated carbon fiber have poor waterproof performance. It is greatly reduced, and the desorption liquid still needs to be further separated, which increases the processing cost

[0003] The Chinese invention patent with the application number 200710192211.X discloses an "organic waste gas purification device", which includes an adsorption tower, a waste gas inlet, a waste gas outlet and a waste water outlet. For absorption, the adsorption efficiency is limited, and in the desorption process, water vapor is used for desorption, and a series of operations such as separation of the collected wastewater after desorption are required to obtain the product; then the drying fan is turned on to dry the adsorption tower. Adsorbents are used to realize the reuse of adsorbents, but the waterproof performance of the adsorbents currently used is poor. Through repeated steam distillation-drying fan drying processes, the service life of the adsorbents is reduced, especially in the vacuum desorption process. It is necessary to evacuate the absorption tower to a state close to a complete vacuum, and the requirements for the adsorption and desorption equipment are extremely high in a state close to a complete vacuum; in the prior art, in the process of vacuuming, in order to make the container closer to a complete vacuum , the energy consumption will increase exponentially, and the performance requirements for equipment and the loss of equipment will also increase exponentially

[0004] The Chinese invention patent with the application number 200410023944.7 discloses "an oil vapor recovery device". The adsorption tank is equipped with a control valve and a desorption valve, and the desorption valve is connected with a vacuum pump. After the air containing oil vapor is processed When performing desorption, the adsorption tank needs to be evacuated to a complete vacuum state to complete the desorption process. The adsorption tank in the above-mentioned vacuuming process needs to be made of special materials, which increases the cost of processing air containing oil vapor, and Increased energy consumption in the process of adsorption and desorption

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