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A method for improving the quality of sludge pyrolysis oil

A technology for pyrolysis of oil and sludge, applied in the field of waste treatment and resource utilization, can solve the problems of high viscosity, low yield and large acid value of pyrolysis oil, reduce reaction resistance, improve quality, and increase pores rate effect

Active Publication Date: 2017-07-21
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the problems of high viscosity, high acid value and low yield of pyrolysis oil obtained by the existing sludge pyrolysis technology, and provide a method for improving the quality of sludge pyrolysis oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Sludge, peanut shells, and oyster shell ash were mixed at a weight ratio of 1:1.0:0.01, and a total of 60 g was spread in a quartz ark, placed in a φ400×600 mm fixed-bed reactor, and the flow rate of nitrogen protective gas was 250 mL / min. The above-mentioned temperature-raising program pyrolyzes in stages, and gradually raises the temperature to 550°C. The pyrolysis oil yield (anhydrous base) obtained after the generated gas is condensed in the condensing device is 36.23%, the calorific value is 33.08MJ / kg, and the viscosity is 18.06mm 2 / g;

Embodiment 2

[0021] Sludge, water hyacinth and oyster shell ash were mixed according to the weight ratio of 1:1.2:0.03, and a total of 60g was spread in the quartz ark and placed in a φ400×600mm fixed-bed reactor with a nitrogen protective gas flow rate of 250mL / min. The above-mentioned temperature-raising program pyrolyzes in stages, and gradually raises the temperature to 550°C. The bio-oil yield (anhydrous basis) obtained after the generated gas is condensed in the condensing device is 39.63%, the calorific value is 33.58MJ / kg, and the viscosity is 17.34mm 2 / g;

Embodiment 3

[0023] Sludge, bagasse, and oyster shell ash were mixed at a weight ratio of 1:1.0:0.01, and a total of 60 g was spread in a quartz ark and placed in a φ400×600 mm fixed-bed reactor with a nitrogen protective gas flow rate of 250 mL / min. The above-mentioned temperature-raising program pyrolyzes in stages, and gradually raises the temperature to 550°C. The bio-oil yield (anhydrous base) obtained after the generated gas is condensed in the condensing device is 40.38%, the calorific value is 34.12MJ / kg, and the viscosity is 16.17mm 2 / g;

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Abstract

The invention provides a method for promoting the quality of oil pyrolyzed from sludge. The method provided by the invention comprises the following steps: mixing sludge, waste biomass and a catalyst according to a weight ratio of 1: (1.0 to 1.5): (0.01 to 0.05); putting the mixture in a fixed bed reactor under a nitrogen atmosphere, segmentally pyrolyzing according to a certain temperature rise program, gradually raising the temperature to 550 DEG C, and condensing generated gas in a condensation device, wherein the yield and the quality of the obtained pyrolyzed oil, which are higher than those of oil pyrolyzed from pure sludge under the same conditions, are respectively: the oil productivity (no water base) is 35% to 45%, the lower calorific value is 30 to 35MJ / kg and the velocity is 15 to 18mm<2> / g. According to the method provided by the invention, the waste biomass and the sludge are co-pyrolyzed, the advantage that the waste biomass and the sludge are pyrolyzed separately is utilized sufficiently to supplement each other, the quality of the oil pyrolyzed from the sludge is promoted, the environmental pollution problem of the two wastes is solved, and clean and high-efficient resource utilization of the two wastes is realized.

Description

technical field [0001] The invention relates to a method for waste treatment and resource utilization, in particular to a method for improving the quality of sludge pyrolysis oil by co-pyrolyzing waste biomass and sludge. Background technique [0002] Environmental pollution and energy crisis have become two major problems in today's society, and have received widespread attention from all walks of life. How to meet the energy demand while protecting the earth environment on which human beings depend has become one of the hotspots of current scientific research. The sludge (abbreviated as sludge) of urban wastewater treatment stations is a by-product of sewage purification with complex components, huge discharge volume, and strong environmental toxicity. It is reduced, stabilized, resourced, and harmless. It has received common attention at home and abroad. Compared with traditional treatment methods such as incineration, landfill, building filler, and composting, pyrolysi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/00C10B53/00C10B53/02C02F11/10
CPCY02E50/10Y02W10/40
Inventor 李宝霞翁连进于庆杰卫文娟酒帮帮
Owner HUAQIAO UNIVERSITY
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