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Method and device for graded utilization of livestock and poultry manure pyrolysis residues

A technology of livestock and poultry manure and pyrolysis, which is applied in the field of resource utilization of livestock and poultry manure, can solve the problems of insufficient high-value utilization of livestock and poultry manure, and achieve deep resource utilization of manure, which is convenient for storage and application strong effect

Active Publication Date: 2020-11-17
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem of insufficient high-value utilization of livestock and poultry manure existing in the prior art, and to provide a method and system for graded utilization of livestock and poultry manure pyrolysis residues. After the phosphorus element is extracted, good adsorption and decolorization materials are obtained by classification, and the deep resource utilization of livestock and poultry manure can be realized, which can not only obtain phosphorus resources, but also avoid phosphorus pollution caused by the pyrolysis residue of livestock and poultry manure used for adsorption and decolorization materials and other issues, with good environmental and economic benefits

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  • Method and device for graded utilization of livestock and poultry manure pyrolysis residues
  • Method and device for graded utilization of livestock and poultry manure pyrolysis residues

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Embodiment 1

[0048] This example is used to illustrate the method for graded utilization of animal manure pyrolysis residue provided by the present invention.

[0049] S1. Raise pig manure from room temperature to 300-700°C at a rate of 25°C / min under anaerobic conditions, and then cool it to room temperature at a rate of 8°C / min to obtain heat Solution residue. Among them, the pyrolysis residues obtained at the final pyrolysis temperatures of 300°C, 400°C, 600°C, and 700°C are called PM3, PM4, PM6, and PM7, respectively.

[0050] S2. Finely grind the pyrolysis residue to a particle size of <100 mesh by dry method, then add sulfuric acid aqueous solution and oscillate and impregnate in a shaker at a temperature of 30°C and a rotation speed of 200r / min for 24h, and the solid-liquid mixing ratio is 20g / L. Afterwards press filtration and dehydration to obtain press filtration solid phase and liquid phase. The liquid phase is rich in phosphorus and can be used as a phosphorus chemical raw mat...

Embodiment 2

[0057] This example is used to illustrate the method for graded utilization of animal manure pyrolysis residue provided by the present invention.

[0058] S1. Raise pig manure from room temperature to 600°C at a rate of 25°C / min under anaerobic conditions, and then cool it to room temperature at a rate of 8°C / min to obtain a pyrolysis residue .

[0059] S2. Finely grind the pyrolysis residue to a particle size of <100 mesh by dry method, then add sulfuric acid aqueous solution and oscillate and impregnate in a shaker at a temperature of 30°C and a rotation speed of 200r / min for 20h, and the solid-liquid mixing ratio is 20g / L. Afterwards press filtration and dehydration to obtain press filtration solid phase and liquid phase. The liquid phase is rich in phosphorus elements and can be used as phosphorus chemical raw materials. Parts with ≥200 mesh and <200 mesh are used as adsorption decolorization materials. Among them, the concentration of sulfuric acid aqueous solution is 0...

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Abstract

The invention belongs to the technical field of livestock and poultry manure resource utilization, and discloses a method and a device for graded utilization of livestock and poultry manure pyrolysisresidues. The method comprises the following steps: S1, carrying out anaerobic pyrolysis on livestock and poultry manure to obtain pyrolysis residues; and S2, crushing the pyrolysis residues until theparticle size is less than 100 meshes, carrying out oscillation extraction on the crushed product by using a sulfuric acid solution, carrying out solid-liquid separation to obtain a solid phase and aliquid phase, drying the solid phase, crushing, separating out a product with the particle size of less than 200 meshes as an adsorption decolorization material, and directly taking the phosphorus-rich element in the liquid phase as a phosphorus chemical raw material. According to the method, phosphorus can be obtained from the livestock and poultry manure pyrolysis residues, phosphorus loss is avoided, solid residues obtained after phosphorus extraction are subjected to grading treatment to obtain the good decolorization material. The decolorization material has a good crystal structure, rich surface functional groups and increased active sites, and therefore the adsorption decolorization capacity of the decolorization material is enhanced; and the decolorization rate can reach 98% or above.

Description

technical field [0001] The invention relates to the technical field of resource utilization of farmed livestock and poultry manure, in particular to a method and device for graded utilization of livestock and poultry manure pyrolysis residues. Background technique [0002] With the expansion of the scale of livestock and poultry breeding in my country and the continuous improvement of the degree of breeding intensification, the production of livestock and poultry manure has increased, the recycling rate has decreased, and the amount of loss into the environment has continued to increase, environmental pollution has gradually deteriorated, and the environmental problem of phosphorus pollution has become increasingly serious. serious. Phosphorus pollution caused by livestock and poultry manure is mainly manifested in two aspects: First, excessive application of mineral phosphate fertilizers and livestock and poultry manure in farmland leads to the accumulation of phosphorus in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/10C01B25/00C02F103/20
CPCC02F11/10C01B25/00C01B25/003C02F2103/20Y02W10/40Y02P20/129
Inventor 余广炜江汝清汪印
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI