浆纸污泥深度脱水混烧发电技术

Deep Dewatering of Pulp and Paper Sludge ＆ Co-Firing Power Generation

浆纸厂废水处理产生的初沉及三级气浮污泥，先经带压机预脱水至干度15％，再与未预脱水污泥混合至干度5％～10％，用新型高压厢式聚丙烯隔膜板框压滤机深度脱水，得干度〉38％的半干化泥饼，破碎后辅加浆渣、木屑，与煤混合去流化床锅炉燃烧产汽、发电。浆纸厂废水处理产生的二级生物污泥，用高效卧螺离心分离机初步浓缩成浓泥浆（8％～10％），再与制浆稀黑液混合，经多效蒸发、超浓蒸发，浓缩成超浓黑液，去碱回收锅炉混烧发电。

The primary settled sludge ＆ tertiary flotation sludge of pulp and paper wastewater treatment plant（ WWT）, With pre-dehydration first to dryness 15%. And then mixed with the original sludge and deep dewatering to dryness 〉 38% by new high-pressure filter press made of polypropylene chamber. The broken semi-dry cake of sludge mixed with the pulp residue, fines, coal to CFBB for Co-Firing ＆ Power Generation, extraction steam supplied to mill. The secondary bio-sludge generated in WWT, concentrated to dryness 8% - 10% by high efficien- cy decanter centrifuge, and the thick slurry mixed with the pulp WBL to multi-effect evaporation, the HBL（ dryness 〉 70% ） evaporated into a super-firing black-liquid（ FBL, dryness 〉80% by super concentrator, and then HBL pumped to the RB for co-firing ＆ power generation, extraction steam supplied to mill.