Device and method for acidifying raw materials and removing sand in ethanol production

A technology for raw materials and ethanol, which is applied in the field of devices for acidification and sand removal of raw materials, can solve the problems of difficult sand removal and incomplete sand removal, and achieves the effect of saving operation steps.

Active Publication Date: 2011-06-15
GUANGDONG ZHONGKE TIANYUAN NEW ENERGY SCI & TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The primary purpose of the present invention is to overcome the defects of difficult and incomplet

Method used

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  • Device and method for acidifying raw materials and removing sand in ethanol production
  • Device and method for acidifying raw materials and removing sand in ethanol production

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Embodiment

[0031] Take the annual output of 50,000 tons of ethanol plant in a certain cassava alcohol factory as an example, further illustrate the technological process of the present invention:

[0032] The cassava starch (still containing 5% fine sand) that removes coarse sand from pulverizing section enters mixing tank 1, and mixing tank 1 has stirring, and its working temperature is 50 ℃, air pressure normal pressure. After the cassava starch is stirred and mixed, the sand-containing powder slurry (accounting for 20% of the cassava starch quality) settles at the bottom of the mixing tank 1, and enters the middle part of the primary acidification tank 5 by means of the potential difference.

[0033] After the liquid level of the first-stage acidification tank 5 rises, steam is introduced to heat it so that the temperature in the tank reaches 90°C, the air pressure is normal pressure, and the stirring is started. At the same time, sulfuric acid with a concentration of 50% is added. 0....

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Abstract

The invention discloses a device and method for acidifying raw materials and removing sand in ethanol production. The method comprises the following steps: (1) stirring a pulverized starch slurry in a stirring tank until the sand-containing starch slurry settles at the bottom and flows into a primary acidification tank; (2) adding sulfuric acid and introducing steam into the primary acidification tank, heating, stirring until sand settles at the bottom of the primary acidification tank, and pumping sand slurry with starch into a secondary acidification tank for further acidification; (3) further stratifying the sand and the slurry, and pumping the sand slurry containing a small amount of starch into a cyclone, wherein the working principles of the secondary acidification tank is the same with those of the primary acidification tank; and (4) separating out the sand by using the cyclone, and returning the slurry containing a small amount of starch to a buffer tank. By using the method, the sand can be removed, and simultaneously, the starch can be completely recycled; the sand removal rate is up to 96%, thereby creating conditions for subsequent production; 20% of liquifying enzyme, a small amount of saccharifying enzyme and 10% of steam can be saved in the liquifying procedure; and the defects of high sand removal difficulty and imperfect sand removal effect in the prior art are overcome.

Description

technical field [0001] The invention relates to the field of ethanol production, in particular to a device and method for acidifying raw materials and removing sand during ethanol production. Background technique [0002] With the depletion of petrochemical energy, countries all over the world regard the development of renewable energy represented by bioenergy as an important part of future energy strategy, and the development of ethanol with food as raw material has been restricted, so the use of renewable non-food Substances (such as cassava and plant cellulose) are used as raw materials to produce ethanol, so as an effective substitute for fuels such as gasoline, it has become the direction of today's energy industry development. [0003] In the utilization process of cassava raw materials, the problem of sand removal has not been well solved, which is reflected in the incomplete sand removal, complicated process and unsatisfactory effect. Taking the production of cassav...

Claims

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Application Information

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IPC IPC(8): C12P7/06
CPCY02E50/17Y02E50/10
Inventor 马建智唐兆兴姜新春周宏才李超韩品谦
Owner GUANGDONG ZHONGKE TIANYUAN NEW ENERGY SCI & TECH
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