1. What is sludge?

Sludge is mainly a solid waste generated during the separation and interception of domestic and industrial wastewater treatment processes. Its main components include water, organic matter, inorganic matter, viruses, insect eggs, microorganisms, etc. It is usually classified as solid waste. If sludge is directly discharged or piled up without treatment, it will cause pollution to water bodies, air, and soil, thereby endangering human health. Therefore, the treatment and disposal of sludge are very important.

2. What are the principles for the treatment and disposal of sludge?

The principles and goals of sludge treatment and disposal are reduction, harmlessness, stabilization, and resource utilization. Sludge drying can achieve sludge reduction (volume reduction), harmlessness (inactivation of viruses, parasite eggs, etc.), stabilization (conversion of perishable organic matter into stable organic matter), reduce transportation and storage costs for enterprises and factories, as well as outsourcing treatment and disposal costs, and minimize the potential harm of sludge to the environment. At the same time, the dried sludge can be better disposed of, such as co firing/incineration, biomass mixing granulation into fuel pellets, and resource utilization as fertilizer, building materials, etc.

3. What is low-temperature sludge drying equipment?

Low temperature sludge drying equipment is a device that uses low-temperature technology to dry sludge. Compared with high-temperature technology, low-temperature sludge drying can reduce the safety hazards of fire and explosion. Due to the lower temperature, harmful substances in the sludge are less likely to evaporate, thus reducing secondary pollution. At the same time, condensed water can be simply treated and discharged directly.

4. What are the common peripheral supporting equipment for low-temperature sludge dryers?

Feeding scraper conveyor, sliding wet mud bin, broken bridge bin, bottom shaftless screw conveyor, double screw conveyor, discharging scraper conveyor, discharging shaftless screw conveyor, dry material bin, screw pump, etc.

5. What is the difference between installed power, operating power, and the average operating power used to calculate the operating cost of an HP sludge drying system?

The installed power is the sum of the motor power of all equipment inside the HP low-temperature sludge drying equipment; The operating power is the sum of the operating power of all equipment inside the HP low-temperature sludge drying equipment; The average operating power is the empirical power value of HP low-temperature sludge drying equipment during actual operation. For example, HP needs to run for 24 hours, but not all internal equipment of HP runs for 24 hours. Compressor, electric heater and other equipment operate intermittently.