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Method for preparing solid forming fuel with pig manure as raw material

A technology of solid molding fuel and pig manure, which is applied in the field of solid waste recycling, can solve the problems that are not conducive to large-scale industrial production, fuels are prone to odor, difficult to use and store, etc., so as to facilitate large-scale industrial production and reduce waste. Secondary pollution and long service life of wearing parts

Active Publication Date: 2013-12-04
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most technologies adopt the method of pressing first and then drying to produce solid fuel, but it is easy to crack during the drying process, reducing its strength, and it is also easy to break during transportation
The fuel produced by most of the technologies has not undergone desulfurization, deodorization and anti-mildew process, so the fuel is prone to odor and mildew, and even causes serious secondary pollution when used, making it difficult to use and store
In addition, some researchers add binders in the raw material preparation process, which increases production costs and is not conducive to large-scale industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of the solid briquette fuel with pig manure as raw material of the present embodiment comprises the following steps:

[0029] a. Pretreatment: Dry the pig manure obtained by the dry manure cleaning method to reduce the moisture content to 15%, then crush and sieve the dried pig manure to obtain pig manure raw materials, and the particle size of pig manure raw materials is ≤ 5mm; then add desulfurization, deodorization and anti-mildew additives according to 5% of the dry basis of pig manure, and stir evenly to obtain dried pig manure raw materials. It is made by mixing 92% quicklime, 6% ferrous sulfate and 2% chitosan fiber.

[0030] b. Mixing and molding: Under the conditions of molding pressure of 90MPa and molding temperature of 90°C, the dried pig manure raw material is extruded through a ring die molding machine to obtain solid molding fuel.

[0031] The solid briquette fuel obtained in this example is granular, with a diameter of 8mm, a leng...

Embodiment 2

[0033] The preparation method of the solid briquette fuel with pig manure as raw material of the present embodiment comprises the following steps:

[0034] a. Pretreatment: Dehydrate the pig manure after solid-liquid separation by water flushing method to reduce the moisture content to 50%, and then dry the pig manure with a dryer to reduce the moisture content to 18% %, then crush and sieve the dried pig manure to obtain pig manure raw material, the particle size of pig manure raw material is ≤4mm; then add desulfurization, deodorization and anti-mold additives according to 3% of the dry weight of pig manure, and stir evenly to obtain Pig manure drying raw material, the dry basis calorific value of pig manure drying raw material is 4465 kcal / kg, the additive is prepared by mixing 90% quicklime, 5% ferrous sulfate, and 5% magnesium carbonate in terms of mass fraction.

[0035] b. Mixing and forming: 60% pig manure drying raw material and 40% straw are mixed and stirred evenly ...

Embodiment 3

[0038] The preparation method of the solid briquette fuel with pig manure as raw material of the present embodiment comprises the following steps:

[0039] a. Pretreatment: Dry the pig manure obtained from the biogas digester to reduce the moisture content to 20%, then crush and sieve the dried pig manure to obtain the raw material of pig manure. The particle size of the raw material of pig manure is ≤3mm ; Then add desulfurization, deodorization and anti-mildew additives by 2% of the dry mass of pig manure, stir to obtain the dry raw material of pig manure, the dry basis calorific value of the dry raw material of pig manure is 2575 kcal / kg, and the additive is calculated by mass fraction It is made by mixing 90% quicklime, 4% ferrous sulfate, 4% magnesium carbonate and 2% chitosan fiber.

[0040]b. Mixing and molding: 50% pig manure drying raw material, 30% fungal residue and 20% anthracite were mixed and stirred evenly by dry weight to obtain a raw material mixture. The dry ...

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Abstract

The invention discloses a method for preparing solid forming fuel with pig manure as raw material. The method comprises the steps as follows: firstly, drying the pig manure to enable the moisture content of the pig manure to be reduced to 10%-25%, then crushing the pig manure and adding the additive capable of desulfuration, deodorization and mold prevention via 2%-5% dry basis quality of the pig manure so as to form the dried pig manure raw material; uniformly mixing and stirring 20%-100% of the dried pig manure raw material, 0%-80% of biomass and 0%-20% of coal by dry weight to obtain the raw material mixture, and then utilizing forming machine to perform hot-pressing formation, so as to obtain the solid forming fuel. The method has the characteristics of simplicity, convenience, feasibility, energy conservation and environmental protection, high treatment efficiency, low production cost, and high convenience for large-scale industrialized production, and the solid forming fuel has no odor, is not easy to mildew, is convenient in transportation and storage and high in combustion efficiency and has fewer secondary pollutant emissions. Therefore, harmless treatment and resource utilization of the pig manure are realized, and the problem about treatment and disposal of the excessive pig manure can be effectively solved.

Description

technical field [0001] The invention belongs to the field of solid waste recycling, and in particular relates to a method for preparing solid briquette fuel by using pig manure as a main raw material. Background technique [0002] In 2000, my country's pig manure production was 1.54 billion tons, equivalent to 1.6 times the industrial solid waste production (950 million tons) in the same period, and the pig manure production increased by 1-2 times every 10 years. The huge production of pig manure makes the amount of pig manure far exceed the reasonable usage and the processing capacity of the surrounding environment. Moreover, the traditional methods of processing pig manure, such as composting and fermentation capacity, are difficult to realize the harmless treatment and resource utilization of pig manure. [0003] In recent years, domestic and foreign literature and patents also have reports on the technology of preparing fuel from pig manure. Most technologies adopt the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/46C10L5/40
CPCY02E50/30Y02E50/10
Inventor 袁兴中肖智华李辉蒋龙波林宁波郭晶晶王侯曾光明
Owner HUNAN UNIV
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