Compound sludge dewatering conditioner adaptable to incineration treatment technology of excess sludge as well as preparation method and application of conditioner

A technology for sludge dehydration and excess sludge, which is applied in the direction of dehydration/drying/concentrated sludge treatment, etc. It can solve the problems of large amount of chemical addition, insignificant conditioning effect, and influence on comprehensive utilization of sludge, and achieves simple and efficient dehydration. Low cost and the effect of reducing the cost of sludge incineration

Inactive Publication Date: 2015-09-09
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the amount of medicament added is large, it cannot act on the water inside the cells, the conditioning effect is not significant, and the addition of conditioners affects the comprehensive utilization of subsequent sludge and other problems that need to be solved urgently.

Method used

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  • Compound sludge dewatering conditioner adaptable to incineration treatment technology of excess sludge as well as preparation method and application of conditioner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Sludge, biomass, municipal waste and fly ash for removal of chlorine-containing plastics according to SiO 2 (10%):Al 2 o 3 (5%): Fe 2 o 3 (1%): CaO (10%): C (60%) mixed in mass ratio, other non-heavy metal element content is not limited, mixing method: sludge, biomass and municipal waste are uniformly mixed and a layer of pulverized coal is spread on it ash, and then spray a kind of landfill leachate, accounting for 10% of the total weight, with a total height of 1 meter, and then pile up the second layer, and so on, after the pile, carry out anaerobic fermentation for 10 days, ventilate the fermentation mixture for 20 days, and stack the finished product It can be used as sludge dehydration conditioner.

[0023] The sludge conditioner is added to the sludge, and the amount of the sludge conditioner added is 60% of the mass percentage of the dry weight of the sludge. Stir evenly, perform anaerobic fermentation for 5 days, and ventilate the mixture after fermentation...

Embodiment 2

[0025] Sludge, biomass, municipal waste and fly ash for removal of chlorine-containing plastics according to SiO 2 (20%):Al 2 o 3 (8%): ​​Fe 2 o 3 (5%): CaO (6%): C (50%), (the content of other non-heavy metal elements is not limited) mixed in mass ratio, mixing method: sludge, biomass and municipal waste are evenly mixed and spread a layer on it Fly ash is then sprayed with 97% anaerobic water treatment to produce residual sludge or river silt accounting for the total weight (7%), with a total height of 3 meters, and then pile the second layer, and so on, carry out anaerobic treatment after the pile Ferment for 5 days, stack the finished product and ventilate for 15 days, it can be used as a sludge dehydration conditioner.

[0026] Add the sludge conditioner to the sludge, the amount of the sludge conditioner added is 40% of the mass percentage of the dry weight of the sludge, stir evenly, perform anaerobic fermentation for 3 days, press and dehydrate, and ventilate the m...

Embodiment 3

[0028] Sludge, biomass, municipal waste and fly ash for removal of chlorine-containing plastics according to SiO 2 (15%):Al 2 o 3 (10%): Fe 2 o 3 (10%): CaO (0.5%): C (50%) (other non-heavy metal element content is not limited) mass ratio mixing, mixing method: sludge, biomass and municipal waste are uniformly mixed and then spread a layer of powder on it Coal ash is then sprayed with river channel silt accounting for the total weight (5%), and the total height is 2 meters, and then the second layer is piled up, and so on, and anaerobic fermentation is carried out for 4 days after the pile, and the finished product is ventilated for 5 days, which can be used for sewage treatment. Mud dehydrating conditioner.

[0029] The sludge conditioner is added to the sludge, and the amount of the sludge conditioner added is 10% of the mass percentage of the dry weight of the sludge. Stir evenly, perform anaerobic fermentation for 3 days, and ventilate the mixture after fermentation an...

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Abstract

The invention relates to a compound sludge dewatering conditioner adaptable to an incineration treatment technology of excess sludge as well as a preparation method and an application of the conditioner. The conditioner comprises components as follows: 10%-20% of SiO2, 5%-10% of Al2O3, 1%-10% of Fe2O3, 0.5%-10% of CaO and 15%-60% of C. The preparation method comprises steps as follows: fly ash, urban garbage with chlorine-containing plastic removed, sludge, biomass, excess sludge which contains 97% of moisture and is produced by anaerobic water treatment and landfill leachate are evenly mixed in proportion, subjected to anaerobic fermentation for 3-5 days, pressed, dewatered and ventilated for 5-20 days, so that the conditioner is obtained. The compound sludge dewatering conditioner dewaters the sludge with a lysis technology, is non-toxic and harmless and cannot cause secondary pollution to the environment, and the dewatering cost is low; when the conditioner is applied to deep sludge dewatering, the method is simple, the moisture content can be decreased to 5-30%, preparation of sludge boiler fuel rods is facilitated, and the sludge incineration cost is reduced.

Description

technical field [0001] The invention belongs to the field of sludge dehydration composite conditioner and its preparation and application, and in particular relates to a sludge dehydration composite conditioner suitable for the incineration treatment process of surplus sludge, its preparation method and application. Background technique [0002] Sludge is a viscous substance produced in the process of sewage treatment. It is mainly composed of aerobic and anaerobic microorganisms. It has a high content of organic matter and is closely combined with water. Generally, the water content of the sludge in the secondary sedimentation tank of the sewage plant is 97% to 99%, of which the interstitial water accounts for about 70%, the capillary water accounts for about 20%, the adsorbed water is about 7%, and the intracellular water is about 3%. At present, after sedimentation and dehydration of sewage plant sludge, the water content is 75% to 85%. At this time, the water form in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14
Inventor 李登新蔡文倍
Owner DONGHUA UNIV
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