Thermal desorption regeneration system

Hydrogen peroxide saturated activated alumina pellet thermal desorption regeneration system

Process flow description
As a hazardous waste, the disposal cost of hydrogen peroxide industrial waste Al2O3 pellets is a key problem that plagues the production cost of enterprises. The recycling and separation of harmful substances have attracted more and more people's attention. We have studied the regeneration method of alumina adsorbent samples discarded in the hydrogen peroxide industry, and found that solvent washing is difficult to remove the adsorbed anthraquinones in the material; high-temperature burning can successfully regenerate the material, but the burning temperature has a value ( 700oC), when the temperature is lower than 700oC, the material appears gray, and the residual carbides on the surface are not removed. When burning at higher than 800oC, the specific surface of the material decreases significantly, the pore size becomes larger, and the key performance indicators as an adsorbent material are reduced; 700oC burning Sintering can better preserve the pore structure and specific surface of the material on the premise of removing the adsorbate residue in the sample, which is beneficial to the reuse of the material and reduces the rate of waste alumina adsorbent produced by the hydrogen peroxide industry. This not only saves a considerable amount of hazardous waste disposal costs for enterprises, but the recycling of hazardous wastes greatly reduces production costs and increases corporate profits, while saving the country's mineral resources.
The designed pyrolysis process is as follows: through the feeding conveying system and the closed feeding device, it enters the head of the rotary pyrolysis furnace, and then gradually moves forward with the rotation of the cylinder, and at the same time, the pellets are continuously heated. , in the primary rotary desorption kiln at -200℃, the water vapor and a small amount of organic waste gas are thermally decomposed. The solid and gas generated at the end of the rotary pyrolysis furnace are led to the waste gas treatment system, and the solid pellets are led to the secondary rotary pyrolysis furnace. The head then gradually moves forward with the rotation of the cylinder. At the same time, the pellets are continuously heated, and all the high-boiling organic waste gas is decomposed by thermal desorption in the final rotary desorption kiln at -750°C. The solid and gas generated at the tail of the furnace are decomposed, the waste gas is led to the waste gas treatment system, and the hot pellets of solid regeneration are introduced into the head of the third-stage rotary cooler, and then gradually advance with the rotation of the cylinder. The balls are continuously cooled by cold air contact, and the solid and gas generated at the tail of the rotary cooler are led to the exhaust gas treatment system, and the regenerated normal temperature balls are introduced into the transportation and storage system.