With the increase of sewage, the quantity of sludge raw materials also increases. What’s more, sludge drying disposal charging policy also brings basic development guarantee. With the improvement of living standard, various sludge qualities also brings wide development path for sludge recycling system.
Environmental XPRT is a global environmental industry marketplace and information resource. Online product catalogs, news, articles, events, publications & more. Regional disposal options, such as agricultural application, will steadily decrease in the future.
If a chamber temperature is detected to be above the control temperature, the energy inlet is interrupted and the dryer is turned off. The relevant information is sent to those responsible via the communication module. On the exhaust pipe over the sound absorber, a t-piece is fitted with a dual action exhaust gas valve.
The sludge shaping machines outlet communicates with the inside of the sludge microwave dryer; the microwave generating device is connected to the sludge microwave dryer through the waveguide. The dust collection unit includes a cyclone dust collector, a rotary dust discharge gate, and an exhaust fan. The exhaust fans inlet is connected with the cyclone dust collector through a pipeline.
The dewatered sludge cake is driven through the gap between the cone and the basket and drops onto a conveyor or directly into a dumpster. The screw flights are provided with brushes for continuous internal cleaning of the wedge section basket. Spray nozzles are also provided for periodic cleaning of the basket from the outside with spray water. The basket is provided with a cover for housekeeping and odor containment. Sludge is applied to the cells of the sand drying bed through a pressurized pipe with a valved outlet to each cell or with a shear gate at the end of the outlet to each cell. Provisions should be made to flush the piping and, if necessary, to prevent it from freezing in cold climates.
The sludge will be dried during the heat transfer between hot air and sludge. Sewage sludge dryer is designed with the best working conditions, which enables it to save 10-15% of energy and increase 10-15% of productivity compared with common dryers. Sludge dewatering is the process to reduce the water after thickening process.
Control processing temperature under 75ºC with outlet dried sludge temperature below 50ºC. The frame construction is produced in a modular design of strong-walled stainless steel profiles. All elements within the drying chambers that come into contact with the material are designed in stainless steel. All the interior cladding of the dryer rooms is non-corrosive material. The external cladding of the dryer is produced from stainless steel profiles with 60mm of mineral wool insulation.
This is an essential stage because, quite often during the handling processes, the sludge’s granular structure can be damaged, at least in part. Furthermore, this unit must be protected by stringent safety rules . The central shaft of the rotor is the bearing part of the dry rotary plate, with a hollow structure.