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
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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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