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Desanding method used in process for producing ethanol by adopting cassava

A production process and technology for ethanol, applied in the field of ethanol production from cassava, can solve the problems affecting the service life of equipment, loss of cassava starch, and reduction of alcohol yield, etc., so as to improve energy utilization rate, reduce starch loss, and reduce the amount of processed materials. Effect

Active Publication Date: 2012-03-28
中石油吉林化工工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. At present, the sand in cassava dry raw materials has a particle size of less than 5mm, a large sand content, and a very low sand removal rate, only about 30%.
[0004] 2. Moreover, the starch granules contained in the sand are not easy to wash out and are thrown away together with the sand
[0005] 3. Cause the loss of cassava starch, resulting in a decrease in alcohol yield
[0006] 4. The material liquid contains sand, which seriously wears out the equipment during the production process and seriously affects the service life of the equipment.

Method used

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  • Desanding method used in process for producing ethanol by adopting cassava
  • Desanding method used in process for producing ethanol by adopting cassava

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Mixing with sandy cassava flour: Sandy cassava flour is mixed in a mixing tank. Mix sandy cassava flour and hot water in a ratio of 1:3. After mixing, the temperature is 60°C. Add high-temperature-resistant amylase in an amount of 21u / g per gram of cassava flour. Stir evenly, and the number of revolutions of the agitator is 50 rpm / min, stirring and heat preservation for 40min.

[0029] First-stage sand removal and separation, the uniformly mixed cassava flour feed liquid is input into the upper part of the first-stage long strip-shaped square tank, kept at 60°C, stirred and settled, stirred evenly, and the rotation speed of the agitator is 60 rpm. Sand and material liquid are separated to obtain sand-containing sediment and sand-free material liquid. A grit collection tank is installed at the bottom of the long strip-shaped tank, and the grit collection tank is connected to an automatic unloader to obtain the first-stage Sandy cassava flour feed liquid is processed a...

Embodiment 2

[0036] Mixing with sandy cassava flour: Sandy cassava flour is mixed in a mixing tank. Mix cassava flour with sand and hot water in a ratio of 1:5, the temperature after mixing is 62°C, add high-temperature-resistant amylase, the addition amount is 30u / g per gram of cassava flour, stir evenly, and the number of revolutions of the agitator is 41 rpm / min, stirring and heat preservation for 60min.

[0037] First-stage sand removal and separation, the uniformly mixed cassava flour feed liquid is input into the upper part of the first-stage long strip-shaped square tank, kept at 62°C, stirred and settled, stirred evenly, and the rotation speed of the agitator is 50 rpm. Sand and feed liquid are separated to obtain sand-containing sediment and sand-free feed liquid. A grit collection tank is installed at the bottom of the long strip-shaped tank, and the grit collection tank is connected to an automatic unloader to obtain the first-stage sand-free liquid. The cassava flour feed liq...

Embodiment 3

[0044] Mixing with sandy cassava flour: Sandy cassava flour is mixed in a mixing tank. Mix sandy cassava flour and hot water in a ratio of 1:3. After mixing, the temperature is 62°C. Add high-temperature-resistant amylase in an amount of 27u / g per gram of cassava flour. Stir evenly, and the number of revolutions of the agitator is 45 rpm / min, stirring and heat preservation for 60min.

[0045] First-level sand removal and separation, the uniformly mixed cassava flour liquid is input into the upper part of the first-level long strip-shaped square tank, kept at 62°C, stirred and settled, stirred evenly, and the rotation speed of the agitator is 41 rpm. Sand and feed liquid are separated to obtain sand-containing sediment and sand-free feed liquid. A grit collection tank is installed at the bottom of the long strip-shaped tank, and the grit collection tank is connected to an automatic unloader to obtain the first-stage sand-free liquid. The cassava flour feed liquid is processed...

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Abstract

The invention relates to a method for producing ethanol by adopting cassava, in particular to a desanding method used in process for producing ethanol by adopting cassava, which is characterized by comprising the following steps in production: feeding of sand-containing cassava into a feed bin, blending of sand-containing cassava starch, first-stage desanding separation, second-stage desanding separation, third-stage desanding separation, fourth-stage desanding separation and sand collection. The desanding method has the advantages of being capable of improving the removal rate of sand in the cassava material (the total removal rate of sand in cassava is only 30 percent currently, and the removal rate of sand is improved to be more than 95 percent), greatly reducing the loss of starch, saving water, improving the energy utilization rate, improving the ethanol yield, and greatly prolonging the service life of alcohol production equipment. The treatment capacity of the sand-containing cassava starch after separation is greatly reduced compared with the material treatment capacity of other desanding technologies, and the desanding effect is greatly enhanced, and the desanding cost is reduced. the method has remarkable technical progress.

Description

technical field [0001] The invention relates to a production method for preparing ethanol from cassava, in particular to a sand removal method in the production process of preparing ethanol from cassava. Background technique [0002] At present, in the process of producing ethanol from dried cassava as raw material, there is a problem of difficult sand removal. Generally, the ethanol production enterprises that use dried cassava as raw material mostly adopt sand removal process after the raw material is crushed and then mixed. , the main problem exists: [0003] 1. At present, the sand in the cassava dry raw material has a particle size of less than 5mm, the sand content is large, and the sand removal rate is very low, only about 30%. [0004] 2. Moreover, the starch granules contained in the sand are not easy to wash out and are thrown away together with the sand. [0005] 3, cause the loss of tapioca starch, cause alcohol yield to reduce. [0006] 4. The material liqui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/06C12P19/14
CPCY02E50/17Y02E50/10
Inventor 岳国海杨素珍陶琳滕大君
Owner 中石油吉林化工工程有限公司
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