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Method for producing solid fuel by exploding biomass waste through flue gas

A biomass waste and solid fuel technology, applied in the field of waste recycling and biomass energy, can solve the problems of high water content, high energy consumption, and difficult molding, so as to reduce production energy consumption and material crushing energy consumption , strong applicability

Active Publication Date: 2014-12-17
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a simple, energy-saving and easy-to-form solid fuel production method for the problems of difficulty in forming biomass solid fuel and high energy consumption, and high water content in extrusion molding of existing steam explosion pretreatment materials. At the same time, a method for resource utilization of flue gas is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this embodiment, blasting wheat straw with flue gas is used to prepare molded granular fuel, including the following steps:

[0028] a. Raw materials and processing: freshly harvested wheat straw has a moisture content of 46%, and is crushed to 20-40mm.

[0029] b. Flue gas blasting: put the crushed wheat straw into the steam explosion chamber, the filling volume is 2 / 3 of the volume of the explosion chamber, close the spherical valve and feed the compressed high-pressure and high-temperature flue gas, and ventilate for 45 seconds to make the pressure reach 2.5MPa After closing the inlet valve, the temperature in the tank is maintained at 130-140°C for 15 minutes, and then the material is blasted;

[0030] c. Gas explosion material drying: the moisture content of the material after blasting is 32%, and it is dehydrated and dried to a moisture content of 15-17% through the flue gas fluidized bed;

[0031] d. Molding: The dry material is extruded through a ring die fo...

Embodiment 2

[0034] In this embodiment, the pelletized fuel is prepared by blasting pine blocks with flue gas, including the following steps:

[0035] a. Raw materials and treatment: Air-dried pine wood with a moisture content of 9% is crushed into 10-30×20-30×10-30mm, and then added with water to adjust the humidity overnight to a moisture content of 18%;

[0036] b. Flue gas blasting: crushed pine wood chips are loaded into the steam explosion chamber, and the filling volume is 2 / 3 of the volume of the explosion chamber. After closing the spherical valve, the high-temperature and high-pressure flue gas is introduced for 42 seconds, so that the pressure reaches 2.5 MPa and then the air intake is closed. Valve, the temperature in the tank is maintained at 160-170°C for 15 minutes, and then the material is blasted;

[0037] c. Direct molding of gas-exploded materials: the water content of pine wood materials after blasting is 14%, which can be directly used for molding, and extruded by a ri...

Embodiment 3

[0040] In this embodiment, fresh rice is exploded with flue gas to prepare shaped block fuel, which includes the following steps:

[0041] a. Raw materials and processing: Fresh rice straw with a moisture content of 60% is chopped into 100-150mm;

[0042] b. Flue gas steam explosion: put the shredded straw into the steam explosion chamber, the filling volume is 2 / 3 of the volume of the explosion chamber, close the spherical valve and feed the flue gas for 45 seconds to make the pressure reach 2.6MPa and then close the intake valve , the temperature in the tank is maintained at 160-170°C for 10 minutes, and then the material is blasted;

[0043] c. Drying of steam-exploded materials: the moisture content of the rice straw material after explosion is 38%, and it is dehydrated and dried to a moisture content of 17% by flue gas fluidized bed;

[0044] d. Molding: After drying, the material is extruded through a ring die forming machine to obtain a shaped block fuel.

[0045] The...

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Abstract

The invention discloses a method for producing solid fuel by exploding biomass waste through flue gas and relates to the field of waste resource recycling and biomass energy sources. The method comprises the steps of 1) biomass waste crushing, including cutting up the biomass waste to 10-150 mm; 2) flue gas explosion, including filling the biomass waste into a steam explosion tank, after the steam explosion tank is sealed, feeding flue gas in for 10-60 seconds until reaching a pressure of 1.0-3.0 MPa, and after the temperature is maintained to be 100-200 DEG C for 0.5-30 minutes, relieving the valve suddenly to achieve instant releasing and decompression of materials; (3) extrusion forming, including extruding the steam-exploded biomass waste into extrusion-formed solid fuel through a forming machine. The method for producing the solid fuel by exploding biomass waste through the flue gas has the advantages of reducing the collecting, conveying and storing cost of raw materials; reducing the energy consumption during raw material crushing and extrusion forming; facilitating recycling and reduction of the flue gas; being easy to operate, high in processing efficiency, low in cost and applicable to mass production.

Description

technical field [0001] The invention relates to the fields of waste resource utilization and biomass energy, including flue gas purification and resource utilization and utilization of biomass waste resources, and specifically relates to a method for preparing solid fuel by using flue gas blasting to pretreat biomass waste . Background technique [0002] my country is a large agricultural production country with abundant biomass resources. The annual output of crop straw exceeds 700 million tons, equivalent to about 350 million tons of standard coal. There are still about 250 million tons of straw that can be used to produce briquettes. In addition, the annual biomass resources of the forestry industry are about 1.3 billion tons, and the urban domestic solid waste is about 150 million tons. These organic wastes will provide the development of biomass solid briquettes. Guaranteed. On the other hand, the combustion performance of biomass is improved by an average of 20% after ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/44
CPCY02E50/10Y02E50/30
Inventor 孙付保张震宇许银彪
Owner JIANGNAN UNIV
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