Method for improving straw enzymolysis efficiency by synergistic pretreatment of Steam Explosion and ultra micro-pulverization
A technology of ultrafine pulverization and pretreatment, which is applied in the direction of water/steam pretreatment, fine split raw material pretreatment, fiber raw material treatment, etc. It can solve the problems of incomplete enzymatic hydrolysis of hemicellulose, re-pollution of cellulose, waste of resources, etc. problems, to achieve the effect of increasing chemical reactivity, increasing particle surface area, and saving energy consumption
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Embodiment 1
[0022] Add 20g of rice straw with a water content of 10% into the steam explosion pot, the blasting condition is steam pressure 1.3Mpa, hold for 2 minutes, release the pressure instantly to obtain steam-exploded wheat straw, then air-dry the steam-exploded wheat straw to obtain a moisture content of 6 % air-dried steam-exploded straw; air-dried steam-exploded rice straw is pulverized by a fluidized bed jet-type airflow ultrafine pulverizer, and the steam-exploded rice straw ultrafine powder obtained is 90%; the fluidized bed used in the present embodiment The grading wheel frequency of the jet-type airflow ultrafine pulverizer is 20Hz, the pulverization time is 10min, and the feeding speed is 10Kg / h; the powder particle size is mainly distributed in the range of 63-237 microns, the average fiber length is 180 microns, and the composition cells of the powder account for The proportions were 53.1% for fibroblasts, 26.2% for parenchyma cells, 19.6% for epidermal cells, and 1.1% fo...
Embodiment 2
[0025]Add 20 g of straw with a water content of 15% into the steam explosion tank, the blasting condition is a steam pressure of 1.2Mpa, the holding time is 4 minutes, and the pressure is released instantly to obtain steam-exploded wheat straw; then the steam-exploded wheat straw is air-dried to a water content of 6%; The steam-exploded rice straw after the air-drying is pulverized with a fluidized bed jet-type airflow ultrafine pulverizer, and the technical parameters of the fluidized-bed jet-type airflow ultrafine pulverizer used in this embodiment are: classifying wheel frequency 30Hz, pulverization time 15 minutes, the feeding speed is 15Kg / h, and the yield of ultra-micro steam-exploded rice straw powder is 84%. The particle size of the powder is mainly distributed between 40-160 microns, the average fiber length is 110 microns, and the proportions of the constituent cells of the powder are respectively 45.1% of fibroblasts, 36.6% of parenchyma cells, 17.1% of epidermis cel...
Embodiment 3
[0028] Add 20 g of straw with a water content of 20% into the steam explosion pot, the blasting condition is a steam pressure of 1.0 Mpa, and the pressure is released instantly for 5 minutes to obtain steam-exploded wheat straw, and then the steam-exploded wheat straw is air-dried to a moisture content of 6%. The air-dried steam-exploded rice straw is pulverized with a fluidized bed counter-jet airflow ultrafine pulverizer. The technical parameters of the fluidized bed counter-jet airflow ultrafine pulverizer used in this embodiment are: grading wheel frequency 40Hz, pulverization time 10min, feeding The material speed is 16Kg / h, and the yield of ultra-micro steam-exploded rice straw powder is 82%. The particle size of the powder is mainly distributed in 40-100 microns, the average fiber length is 70 microns, and the proportions of the constituent cells of the powder are 34.8% of fibroblasts, 48.8% of parenchyma cells, 15.0% of epidermis cells, and 1.3% of ducts.
[0029] The ...
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