Method and device for preparing phosphorus-rich biofertilizer

A bio-fertilizer and phosphorus-enriched technology, applied in the direction of waste fuel, etc., can solve the problems of insufficient utilization of livestock and poultry manure resources, large energy consumption, and large floor area, and achieve significant energy-saving benefits, low operating costs, and excellent performance. Effect

Active Publication Date: 2016-03-23
中科环境科技研究院(嘉兴)有限公司
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  • Description
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  • Application Information

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Problems solved by technology

[0006] The invention overcomes the deficiencies of the existing diseased and dead poultry treatment technology and insufficient utilization of livestock and poultry manure resources, easy to produce secondary pollution, large energy consumption in the treatment process, and large floor area, and provides a method for utilizing livestock and poultry waste and livestock and poultry waste. The method and system for prep...

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  • Method and device for preparing phosphorus-rich biofertilizer
  • Method and device for preparing phosphorus-rich biofertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Extrude livestock and poultry manure to obtain an extruded solid phase with a moisture content of less than 30%, mix it with the foreign solid phase at a mass ratio of 2 / 3 for 30 minutes, and perform drying treatment after mixing. The drying temperature is 80°C, and the product Carry out carbonization, the carbonization temperature is 500°C, and the material residence time is 30 minutes to obtain pyrolytic charcoal. The pyrolytic charcoal is finely ground and sorted to obtain materials with a particle size of 30%) and high phosphorus content (>30%), it can be used as a biological fertilizer, which is environmentally friendly and has excellent performance; the latter is used as a carbon adsorption material, and its specific surface area is >300m 2 / g, the adsorption performance is better.

[0070] Specifically, the foreign solid phase includes the solid phase obtained by solid-liquid separation after crushing and hydrothermal treatment of livestock and poultry waste. Spec...

Embodiment 2

[0075] Extrude livestock and poultry manure to obtain an extruded solid phase with a moisture content of less than 30%, mix it with the foreign solid phase at a mass ratio of 4:1 for 5 minutes, and then carry out drying treatment at a drying temperature of 150°C. The product Carry out carbonization, the carbonization temperature is 1100°C, and the material residence time is 3 minutes to obtain pyrolytic charcoal. The pyrolytic charcoal is finely ground and sorted to obtain materials with a particle size of <100 μm and materials with a particle size of ≥100 μm. The former is used as a phosphorus-rich fertilizer , the latter as carbon adsorption material.

[0076] The foreign solid phase includes the solid phase obtained by solid-liquid separation after crushing and hydrothermal treatment of livestock and poultry waste. Specifically, the temperature of hydrothermal treatment is 100°C, the pressure is 2bar, and the time is 60min; the product of hydrothermal treatment is subjected ...

Embodiment 3

[0081] The livestock and poultry manure is subjected to extrusion treatment in the extrusion dehydration device (1), the obtained extrusion liquid phase is sent to the liquid phase mixing device (15), and the obtained extrusion solid phase is sent to the To the solid phase mixing device (3), after the extruded solid phase and the foreign solid phase are fully mixed in the solid phase mixing device (3), they are sent to the low temperature drying device (4) for drying, and then to the high temperature carbonization device ( 5) for carbonization, then sent to the cooling device (6) for cooling, after cooling, sent to the fine grinding device (8) for fine grinding through the conveying device (7), and then sent to the sorting device through the conveying device (9) The device (10) sorts to obtain materials with a particle size of <100 μm and materials with a particle size of ≥100 μm, the former is used as a phosphorus-rich fertilizer, and the latter is used as a carbon adsorption ...

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Abstract

The invention relates to a method and device for preparing phosphorus-rich biofertilizer. Phesphorus-rich fertilizer and a carbon adsorption material are obtained through livestock faeces in the steps of squeezing, mixing, drying, carbonization, fine grinding and sorting. Subsequent products obtained after smashing, hydro-thermal treatment and solid-liquid separation of livestock waste can be combined in the preceding steps to be further used, and purified water finally generated can be used for greening. According to the method and device, the livestock faeces and the livestock waste can be effectively used, waste is turned into wealth, the concept of circulating economy and clean production is fully reflected, the adverse influence and risk to the environment are reduced, operation is easy, the technological process saves energy and is remarkable in benefit, operation cost is low, and high-additional-value utilization of products is achieved while harmless treatment of sick and dead livestock is achieved. The method and device have good social benefits, economic benefits and environmental benefits.

Description

technical field [0001] The invention relates to a method and device for recycling resources, in particular to a preparation method and device for phosphorus-rich biological fertilizer. Background technique [0002] With the acceleration of China's urbanization process, intensive livestock and poultry breeding technology occupies an increasingly important position in the national economy, and the scale of breeding continues to grow, and the accompanying problem of livestock and poultry manure disposal is also becoming more and more serious. Livestock and poultry manure pollution has been regarded as the first source of agricultural environmental pollution. In 2011, the total amount of livestock and poultry manure discharged in my country was about 2.12 billion tons, and it is expected to reach 2.875 billion tons in 2020, of which more than 80% were directly applied to farmland without any treatment. The amount of nitrogen and phosphorus discharged through livestock and poult...

Claims

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Application Information

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IPC IPC(8): C05D9/00C01B31/02
CPCC05D9/00C01P2004/60Y02E50/30
Inventor 余广炜汪印李智伟
Owner 中科环境科技研究院(嘉兴)有限公司
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