Sludge drying system for wastewater treatment process

Abstract

The invention discloses a sludge drying system for a wastewater treatment process in the technical field of environment protection. The sludge drying system for the wastewater treatment process comprises a feeding buffer bin, a spiral conveyer, a rotary feeder and the like. The system provided by the invention is operated based on a sewage treatment system; sludge produced from a sewage treatmentprocess is mechanically dewatered and then enters the feeding buffer bin; the water-containing sludge in the feeding buffer bin is conveyed through the spiral conveyer, and the feed quantity of the water-containing sludge is controlled through the rotary feeder, so as to ensure that the water-containing sludge continuously and stably enters a drying machine from the feeding buffer bin; the water-containing sludge is continuously dried in the drying machine, the dried sludge is discharged through a rotary discharging device, and the discharged sludge is out-sourced for treatment; the water content of sludge from the wastewater treatment process generally is 75 to 85 percent by weight, the drying machine adopts steam as a heating medium, and the water-containing sludge is dewatered so as toobtain the dried sludge, and the water content of the sludge is reduced to 1.50 percent by weight or below, and the sludge quantity is greatly reduced; then sludge is out-sourced for treatment, thus the out-sourced treatment cost is saved by 73.5 percent or above.

Description

technical field [0001] The invention relates to the technical field of environmental protection, and specifically relates to a sludge drying system in a waste water treatment process. Background technique [0002] The wastewater treatment process is accompanied by the generation of sludge. The sludge volume is large and the water content is high. The treatment process is complex, difficult and costly. The wastewater produced in the production process of most substances in the industry has complex components and is difficult to directly biochemically treat. It needs to be discharged after physical, chemical, biochemical and advanced treatment. For example, in the production process of toluene diisocyanate, the physical and chemical sludge produced in the wastewater treatment process And biochemical sludge, after centrifugal treatment, the water content is as high as 80±5wt%, and the annual output is 6,000-8,000 tons. It needs to be transported by means of transportation to a ...

AI Technical Summary

Problems solved by technology

[0002] During the wastewater treatment process, sludge is produced, the sludge volume is large and the water content is high, the treatment process is complex, difficult and costly

The wastewater produced in the production process of most substances in the industry has complex components and is difficult to directly biochemically treat. It needs to be discharged after physical, chemical, biochemical and advanced treatment. For example, in the production process of toluene diisocyanate, the physical and chemical sludge produced in the wastewater treatment process And biochemical sludge, after centrifugal treatment, the water content is as high as 80±5wt%, and the annual output is 6,000-8,000 tons. It needs to be transported by means of transportation to a designated processing unit for treatment. The transportation process is heavy and the transportation cost is high;

[0003] The existing treatment technology has a large workload and high cost. The ability of mechanical filtration to reduce sludge is limited, and the discharge after treatment will still cause environmental pollution. In order to achieve sludge reduction and reduce the overall operating cost of the wastewater treatment system , reduce the impact of sludge after wastewater treatment on the environment, and propose a sludge drying system in the process of wastewater treatment

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