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Method for preparing granular fuel from organic wastes

A technology of organic waste and pellet fuel, which is applied in the field of solid waste recycling, can solve the problems of low calorific value of pellet fuel, high pollution caused by product incineration, supplementing the heat of waste incineration, etc., so as to increase unit calorific value, improve efficiency, and The effect of economic benefits

Inactive Publication Date: 2020-03-24
中车环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology of using biomass to prepare organic pellet fuel has problems such as low calorific value of pellet fuel and high pollution of product incineration, and the pellets produced cannot be used to supplement the heat of waste incineration

Method used

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  • Method for preparing granular fuel from organic wastes

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing granular fuel from organic waste, specifically comprising the following steps:

[0022] Step 1: Pretreatment of raw materials: corn stalks are used as raw materials, which are pretreated by mechanical cutting, and the particle size after treatment reaches below 20mm;

[0023] Step 2: Drying and cracking: Send the pretreated moist corn stalk raw material into the anaerobic drying and cracking furnace 1, continuously roll the raw material through the spiral agitator 2, while maintaining the temperature of the cracking furnace at 370-380°C, and dry it. The duration is 30min, and the cracked gas produced in the cracking process is collected into the combustion boiler 7 for combustion, and the heat generated is used to maintain the temperature of the anaerobic dry cracking furnace 1 through the steam generated by the heat exchanger 8;

[0024] Step 3: Granule preparation: The cracked product enters the pressing and granulating equipment to make cylindr...

Embodiment 2

[0037] A method for preparing granular fuel from organic waste, specifically comprising the following steps:

[0038] Step 1: Raw material pretreatment: 50% corn stalks and 50% pine wood are used as raw materials, which are pretreated by mechanical cutting, and the particle size after treatment reaches below 25mm;

[0039] Step 2: Drying and cracking: send the pretreated wet corn stalks and pine wood raw materials into the anaerobic drying and cracking furnace 1, and continuously roll the raw materials through the spiral agitator 2, while maintaining the temperature of the cracking furnace at 380-385°C , the drying duration is 35min, and the cracked gas produced in the cracking process is collected into the combustion boiler 7 for combustion, and the heat generated is used to maintain the temperature of the anaerobic dry cracking furnace 1 through the steam generated by the heat exchanger 8;

[0040] Step 3: Granule preparation: The cracked product enters the pressing and gran...

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Abstract

The invention discloses a method for preparing a granular fuel from organic wastes. The method comprises the following concrete steps: raw material pretreatment: a step of subjecting biomass materialsused as raw materials to mechanical cutting pretreatment until the particle size of the biomass materials reaches 10-20 mm; drying and cracking: a step of sending pretreated raw materials into an oxygen-free drying cracking furnace, allowing the raw materials to be continuously turned over through a spiral stirrer, maintaining the temperature of the cracking furnace at 360-380 DEG C, collecting cracking gas generated in the cracking process, allowing collected cracking gas to enter a combustion boiler for combustion, and allowing generated heat to maintain the temperature of the oxygen-free drying cracking furnace through water vapor generated by a heat exchanger; granule preparation: a step of allowing a cracked product to enter a pressing and granulating device so as to prepare cylindrical granules with a diameter of 6-8 mm and a length of 5-8 cm, and carrying out cooling and discharging; and tail gas treatment: a step of allowing tail gas generated by combustion of the combustion boiler to enter an equipped tail gas treatment system. The method provided by the invention has the following technical effects: the granular fuel prepared by using the method has high product calorific value; and the preparation method is highly-efficient, economical, energy-saving and environmentally-friendly.

Description

technical field [0001] The invention relates to the technical field of solid waste recycling, in particular to a method for preparing granular fuel from organic waste. Background technique [0002] The average calorific value of domestic waste is low, and additional fuel is required during incineration to ensure that the combustion temperature reaches above 850°C, thereby avoiding the generation of dioxins. At present, in order to ensure the treatment effect, most waste incineration projects often use the method of adding granular coal and natural gas to supplement heat, which invisibly greatly increases the operating cost of the project. Therefore, finding an efficient and economical fuel with high calorific value is of great practical significance for reducing the operating cost of waste incineration projects. [0003] On the other hand, my country is a large agricultural country with extremely rich biomass resources and great potential for development and utilization. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/44
CPCC10L5/442C10L5/445Y02E50/10Y02E50/30
Inventor 王琛高明李艳秋陈红瑞李旻
Owner 中车环境科技有限公司