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Sludge treatment engineering

  The company makes full use of diversified technology featuring“sanitary landfill, land utilization, building material and incineration”in terms of sludge treatment and disposition project. It provides customer with all-around sludge treatment solution to reach national standard of“minimization, stabilization, harmless and reutilization” .

  Emergent treatment technology-lime stabilization method

  Reaction Principle

  1kgCaO+0.32kgH2O→1.32kgCa (OH) 2+1177KJ

  1.32kg Ca (OH) 2+0.78kgCO2→1.78kgCaCO3+0.32kgH2O+2212KJ

  2AlPO4+3Ca (OH) 2→Ca3 (PO4) 2+2Al (OH) 3

  Technical Process

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  Land utilization technology-aerobic composting

  Technical Process

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  Technical Advantage

  Harmless: temperature rise to 60 degree, pathogenic bacteria and parasitic ovum die, foul smell disappear

  Stabilizing: organic matter decomposes and turns to stable humus by microbial action

  Reducing quantity: moisture is evaporated, organic matter decomposes, piles reduce in volume and weight reduces

  Reclamating: fermented product can be used for land improvement, landscaping, refuse landfill coverage, construction material

  Technical Feature

  Feature 1: saving occupied area

  Feature 2: control bad smell overflow

  Feature 3: no need of many auxiliary materials

  Feature 4: system is safe and reliable

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  Incineration technology——separate drying incineration

  This technology guarantees requirement on economy and environment protection by sludge treatment by balance of waste heat from sludge incineration system and head demanded by dry system. If heat demanded by dry system is too much, and waste heat supplied by incineration system is not sufficient to dry sludge to self burning, increase auxiliary thermal source. However, compared with direct combustion, increase of auxiliary heat source reduces significantly. During operation process, regulate heat source and inlet air temperature according to temperature inside the furnace, which saves energy consumption to the largest extent and increases adaption of furnace to each sludge heat value.

  Technical Process

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  Technical Equipment

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  Incineration technology——collaborative incineration

  Technical Process

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  Technical Requirement

  Garbage sludge collaborative incineration is mainly for generating electricity through refuse incineration, and for sludge treatment partially.It extracts certain steam from power generation process as heat source for sludge drying, recycle some heat source by sending dry sludge to furnace for incineration. Sludge in the furnace should meet technical requirement by garbage incineration:

  (1)Sludge in furnace should meet with requirement on heat value by garbage incineration. It should not affect or should have minimum impact on incineration environment in the furnace;

  (2)Sludge in furnace should not be higher than 15% of waste incineration amount to ensure waste heat reduction rate <5%.

  (3) The way of sludge entering furnace should meet with the requirement that sludge is mixed with garbage at certain rate. The technical part of sludge entering furnace is a key point to realize mixed combustion of garbage.

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