Activated Carbon It is black powder or block, granular, honeycomb shaped amorphous carbon, and also has regular arrangement of crystalline carbon. In addition to carbon element, carbon also contains two types of admixtures: one is chemically combined elements, mainly oxygen and hydrogen, which are left in carbon due to incomplete carbonization, or in the process, foreign non carbon elements are chemically combined with carbon surface; The other kind of admixture is ash, which is the inorganic part of carbon. Ash in carbon is easy to cause secondary pollution.

Taking the typical three box adsorption device in carbon fiber waste gas recovery device as an example, its equipment composition, process flow and technical characteristics are analyzed.

Equipment composition:

The adsorption equipment is composed of induced draft fan, surface cooler, filter, adsorber, layered tank, etc. The operation of the whole system is controlled by PLC program, and the adsorber is automatically switched to alternately operate the adsorption, desorption and drying process.

technological process:

The volatile gas passes through a certain pre-treatment device first, and then the impurities in the tail gas are further removed through the filter to ensure that these impurities do not occupy the pores of the carbon fiber, affecting the adsorption efficiency and service life of the carbon fiber; The filtered tail gas is introduced into the adsorption equipment through the fan.

The carbon fiber that has absorbed a certain amount of solvent is desorbed with saturated water vapor. After the desorption is completed, the filtered outside air is sent to the adsorber for drying by the fan, so that the carbon fiber bed is cooled and the residual steam is removed, so that the carbon fiber can maintain a high adsorption efficiency. The dried adsorber enters the next working procedure cycle for adsorption.

The mixed steam containing the desorbed substances enters the condenser for condensation, the condensate is cooled by the plate condenser, the condensed substances and condensed water enter the layering tank, and the upper substances automatically overflow to the storage tank after gravity layering, and then are sent to the adsorption recovery equipment by the transfer pump; The condensate in the lower layer is discharged into the wastewater treatment system.

Carbon is paid more and more attention in water treatment. However, due to the high ash content, small pore volume, wide micropore distribution, small specific surface area and poor adsorption selectivity of ordinary carbon, as well as some limitations of its surface groups and electrochemical properties, its adsorption and removal of pollutants are limited, far from meeting the requirements of domestic and international markets. Therefore, it is necessary to modify its structure and properties to increase its adsorption capacity and pollution pressure. At present, modified carbon materials are widely used in the field of sewage treatment, showing an attractive prospect in the treatment of water environmental pollution