Whether from the advocacy of various environmental protection policies or the original intention of sludge treatment, the realization of "four modernizations" after sludge treatment should be regarded as the ultimate goal. Then, what kind of sludge treatment is adopted by the ultra-high pressure sludge dryer to realize the "four modernizations" of sludge disposal.
Four modernizations: reduction, harmlessness, stabilization and recycling.
1. Sludge disposal reduction: before sludge treatment, if the moisture content is more than 97%, it is generally necessary to concentrate first to make the sludge form large particle precipitation, and preliminarily reduce the moisture content of sludge to make it suitable for entering the sludge drying equipment through the sludge feed pump. The thickened sludge is added with conditioner to destroy the molecular structure of sludge and reduce its affinity with water, so as to form super dry mud cake after mechanical drying, so as to realize the reduction treatment of sludge.
2. Sludge harmless treatment: sludge conditioning and sludge mechanical drying stage is also the stage of sludge harmless treatment. The conditioner can separate the heavy metals and other harmful substances in the sludge, eliminate the organic substances and other harmful substances, and then press them dry through the ultra-high pressure sludge dryer. The harmful substances flow away through water and are deeply decomposed in the sewage treatment.
3. Sludge stabilization: sludge produced by sewage treatment plants or industrial enterprises is easy to diffuse, difficult to transport, unable to store temporarily, etc. due to high moisture content, and is easy to corrupt and produce stench. The sludge treated by the sludge dryer forms a mud cake with a moisture content of 15% - 50%. At this stage, the mud cake has been formed, has no viscosity and has been stabilized. It is not a problem whether it is transported or stored for a short time.
4. Sludge recycling: at present, the ways of sludge recycling are gradually diversified, but it is common for sludge to make organic soil for urban greening and flower market, and sludge cake to be used as building materials and subgrade. Sludge deep dewatering is the basis and premise of sludge resource disposal, and the sludge dryer completes the process of sludge treatment.
For the "four modernizations" of sludge, deep dewatering of sludge is very key, which directly affects the whole sludge treatment process and the final disposal effect. Therefore, ultra-high pressure sludge dryer is specialized in deep dewatering of sludge, providing more convenience for sludge treatment enterprises to realize the "four modernizations" of sludge.