Petrochemical sludge refers to petrochemical sludge. Petrochemical sludge, also known as "three muds" (separator sludge, flotation tank scum and residual activated sludge) usually contains a large amount of organic matter, hydrocarbons, oils, high water content, large volume, generally accounting for petrochemicals. 70-85% of the total solid waste of enterprises is classified as hazardous waste according to the National Hazardous Waste List. The treatment and disposal of petrochemical [three muds" has become an environmental issue that cannot be ignored by every petrochemical enterprise and needs to be solved urgently.
Special drying equipment for petrochemical sludge Working principle:
A hollow hollow blade is densely arranged on the hollow shaft, and the heat medium flows through the blade through the hollow shaft. The heat transfer area in the effective volume per unit is large, and the temperature of the heat medium is from -40 ° C to 320 ° C. It can be water vapor or liquid type: such as hot water and heat transfer oil. Indirect conduction heating, no air is carried away to remove heat, and heat is used to heat the material. The heat loss is only the heat dissipation to the environment through the insulation of the body. The wedge-shaped blade heat transfer surface has a self-cleaning function. The relative movement of the material particles and the wedge surface produces a scrubbing action, which can wash away the adhering material on the wedge surface, so that a clean heat transfer surface is maintained during operation. The shell of the paddle dryer is of the omega type, and two to four hollow agitating shafts are generally arranged in the casing. The housing has a sealed end cover and an upper cover to prevent material dust from leaking out and fully functioning.
The heat transfer medium passes through the rotary joint and flows through the casing jacket and the hollow agitating shaft. The hollow agitating shaft has different internal structures according to the type of the heat medium to ensure an optimal heat transfer effect.
Special drying equipment for petrochemical sludge Main features:
1. The material retention time is adjustable, it can process high water content materials, and can also obtain very low water content materials;
2, typical conduction drying method, energy saving, large transmission coefficient, high thermal efficiency, more than 30 ~ 60% energy saving than the usual convection drying.
3. Since all the required heat is supplied by hollow vanes and jackets, in order to reduce the humidity of the exhaust gas, a small amount of hot air is added, the dust entrainment is low, the exhaust gas is easy to handle, and auxiliary equipment such as dust removal is not required.
4. The blade has self-cleaning ability. The blades rotate in opposite directions, and the two inclined surfaces of the blade repeatedly stir, compress, relax and push the material, so that the page has a unique byte capacity, the heating surface is continuously updated, and the heat transfer coefficient of the blade dryer is higher than any other conduction. Drying method.
5. The heating medium is also introduced into the inside of the stirring blade, so the heat transfer area per unit volume of the dryer is larger than that of the general indirect heat transfer dryer.
6, a wide range of processing materials, due to the self-cleaning effect of the heating surface, do not have to return dry material, you can smoothly handle most high-water or viscous paste materials.
7. The amount of material in the dryer is very high, about 70-80% of the volume of the cylinder. The effective heating surface per unit volume is large, the equipment is compact, the volume is small, and the floor space is small.
8, can be easily combined with other drying methods into efficient dryers, to play their respective advantages, to obtain better economic and technical indicators, such as paddle-disc combination, paddle-flash combination.
9, can be operated under vacuum, can recover the solvent, can also complete the evaporation and removal of volatiles of high-boiling viscous materials.
What are the advantages of the configuration of the sludge drying line of the sludge drying line?
1. Hot air is supplied to the entire dryer length dryer.
2. Dry air is mixed with hot air to set the air circulation fan through segments.
3. From the bottom to the top of the product, the direct contact of the product layer, ie safe dry ventilation and with a guarantee.
4. This kind of ventilation ensures the saving of sludge glue.
5. The saturated circulating air is condensed in the conditioning unit. The heat is thus recovered and supplied again to the process.
6. The amount of exhaust air is added by the minimization of heat recovery.
Su Li dry dryer not only satisfies the customer's satisfaction in the production quality, but also makes the customer more satisfied with its service attitude. We will ask the customer's material and production demand ability when the customer purchases, and will tailor the production for the customer. Providing the use of technology, we also provide reasonable advice to customers on maintenance and other aspects, and all-inclusive after-sales maintenance, so that customers can use the dryer with confidence. The perfect combination of quality and service is the guarantee of market development.
