Method for producing ethanol and biogas and co-producing electricity by using corn straws
A technology of corn stalks and ethanol, which is applied in fermentation, biofuels, machines/engines, etc., can solve problems such as difficult large-scale production, failure to adopt, and environmental pollution, so as to improve comprehensive utilization rate, increase energy utilization rate, and reduce The effect of production costs
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Example Embodiment
[0077] Example 1
[0078] Such as figure 2 As shown in the flow chart, corn stalks are processed by the following methods to produce ethanol and biogas while co-generating electricity.
[0079] ①Pre-impregnation: first take corn stalks, crush the stalks to 1 to 5 cm with a hammer mill, and then use 0.2% sulfuric acid to pre-impregnate the corn stalks at room temperature and pressure for 120 minutes.
[0080] ②Steam explosion treatment: Put the pre-impregnated straw in a steam explosion reactor at a temperature of 190℃ (pressure 1.25MPa) for 10 minutes, then open the valve instantly (less than 0.5 seconds), and the straw is formed after pretreatment The straw pulp is washed into the flash tank.
[0081] ③ Simultaneous saccharification and fermentation and distillation: The straw pulp in the flash tank is placed in the fermentation tank so that the solid-liquid mass percentage in the fermentation system is 10%, and the fermentation system also contains 0.5g / l diammonium hydrogen phosph...
Example Embodiment
[0091] Example 2
[0092] Such as figure 2 As shown in the flow chart, corn stalks are processed by the following methods to produce ethanol and biogas while co-generating electricity.
[0093] ①Pre-impregnation: first take the corn stalks, use a hammer mill to crush the stalks to 1 to 5 cm, and then use 1% acetic acid to pre-impregnate the corn stalks at room temperature and pressure for 120 minutes.
[0094] ②Steam explosion treatment: place the pre-impregnated straw in a steam explosion reactor and hold it at a temperature of 200°C (pressure 1.55MPa) for 5 minutes, then open the valve instantly (less than 0.5 seconds), and the straw is formed after pretreatment The straw pulp is washed into the flash tank.
[0095] ③Synchronous saccharification and fermentation and distillation, ④Combustion of solid residue for power generation, ⑤Anaerobic fermentation steps are the same as in Example 1.
[0096] The relevant technical indicators are as follows:
[0097] The recovery rate of glucose...
Example Embodiment
[0103] Example 3
[0104] Such as figure 2 As shown in the flow chart, corn stalks are processed by the following methods to produce ethanol and biogas while co-generating electricity.
[0105] ①Pre-impregnation: first take the corn stalks, use a hammer mill to crush the stalks to 1 to 5 cm, and then use 1% acetic acid to pre-impregnate the corn stalks at room temperature and pressure for 120 minutes.
[0106] ②Steam explosion treatment: place the pre-impregnated straw in a steam explosion reactor and hold it at a temperature of 200°C (pressure 1.55MPa) for 5 minutes, then open the valve instantly (less than 0.5 seconds), and the straw is formed after pretreatment The straw pulp is washed into the flash tank.
[0107] ③ Simultaneous saccharification and fermentation and distillation: The straw pulp in the flash tank is placed in the fermentation tank so that the solid-liquid mass percentage in the fermentation system is 10%, and the fermentation system also contains 0.5g / l diammonium...
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