A laminar flow-type stair-shaped porous material adsorption unit and an adsorption method thereof

Abstract

The present invention provides a laminar flow-type stair-shaped porous material adsorption unit which includes an adsorption tower and is characterized in that a feed hopper (1), an air-inlet grille (4), an air-outlet grille (7), a master feed pipe (10), a saturated material receipt hopper (12), an unsaturated material receipt hopper (13) and multilayer porous material bed layers (11) arranged in a stair-shaped manner are disposed in the adsorption tower; the feed hopper (1) is connected with the porous material bed layers (11) via a feed pipe (2) and the master feed pipe (10); the air-inlet grille (4) is located at the flue gas inlet side of each layer of the porous material bed layers (11), the air-outlet grille (7) is located at the flue gas outlet side of each layer of the porous material bed layers (11); and the porous material bed layers (11) are connected with the material receipt hopper (12) and the material receipt hopper (13) via material receipt pipes (6). The adsorption unit and an adsorption method of the invention have a high contaminant removal efficiency and low operating costs; and the space utilization is high, the construction cost is low, energy consumption is saved.

Description

technical field [0001] The invention relates to a laminar-flow stepped porous material adsorption device and an adsorption method thereof. Background technique [0002] Porous material gas adsorption technology is applied to the adsorption and purification treatment of various types of polluted gases, and its application scope covers the adsorption and purification treatment of various types of polluted gases in many fields such as electric power, chemical industry, metallurgy, glass, and pharmaceuticals. The porous material is a carbon-based adsorbent, which is both an adsorbent and a catalyst, and can also be used as a catalyst carrier. Porous materials can be used to adsorb common gaseous pollutants such as SO 2 , HCl, HF and dioxin and other toxic and harmful organic gases can also be adsorbed and solidified such as Hg 0 Heavy metal gases that are extremely difficult to purify and remove can also be used for low-temperature catalytic reduction such as NO X Such pollut...

AI Technical Summary

Problems solved by technology

The disadvantages are: since the flue gas enters the absorption tower at the bottom, the air intake area is small, the air velocity of the gas in the gas distribution section in the tower is high, the local resistance is large, and the bed resistance of the system is relatively large; Air outlet and porous material feeding and receiving space, so the space utilization rate in the convective absorption tower is low

Disadvantages: The flue gas enters the porous material bed from the side, and the porous material close to the flue gas inlet first undergoes an adsorption reaction and reaches saturation first, and the flue gas moves horizontally, and the adsorption saturation of the porous material in the horizontal direction decreases successively. The distribution is that the adsorption saturation amount of the porous material decreases in the horizontal direction from the inlet to the outlet, and increases in the vertical direction from the top to the bottom. The adsorption amount of the porous material near the flue gas outlet is less, so that the exhausted The porous material contains a large part of the porous material that has not been fully adsorbed, so that part of the nearly fresh porous material is discharged and sent to regeneration, thereby increasing the circulation of the porous material, increasing the desorption energy consumption and the amount of damage during the transportation process, and the system The operating cost of the tower has increased significantly; because the porous material in the upper part of the tower is relatively fresh, the desulfurization efficiency is high, while the adsorption saturation of the porous material in the lower part of the tower is too large, and the removal efficiency of pollutants is reduced. Efficiency and adaptability to flue gas pollutant concentrations are not ideal

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