Method for ordinary pressure continuous extraction of grease from schizochytrium limacinum cake and equipment thereof

A Schizochytrium and extraction technology, applied in the direction of fat oil/fat production, fat production, etc., can solve the problem of large microbial oil production capacity, and achieve the effect of small solvent amount and solvent loss saving

Active Publication Date: 2016-08-24
青岛海智源生命科技有限公司 +1
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AI-Extracted Technical Summary

Problems solved by technology

However, the design principle of the existing atmospheric pressure extraction device makes the production capacity too large for microbial oil. The mainstream high-cost continuous vegetable oil extraction device is rarely less than 1000TPD (tons/...
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Abstract

A method for ordinary pressure continuous extraction of grease from schizochytrium limacinum cake and equipment thereof are disclosed. The invention discloses a method for extracting residual grease from schizochytrium limacinum cake at ordinary pressure by using n-hexane. The method is characterized in that pelletized or puffed schizochytrium limacinum dry mycelium or oil-pressed cake which is used as a raw material undergoes continuous extraction in an n-hexane solvent by reflux and full immersion modes under ordinary pressure by the utilization of a specially-designed immersion-type extractor so as to obtain grease in the schizochytrium limacinum cake. The specially-designed immersion-type extractor is a shallow-bed type. An embedded scraper and a continuous-type tray are arranged inside the extractor. The solvent moves in the reverse direction of the feed scraper. During the whole extraction process, it can be guaranteed that the raw material is completely immersed in the solvent until extraction and slag emission are completed. By the design and the extraction technology, continuous production can be realized, extraction efficiency is improved, and extraction cost is reduced. The equipment of the invention is more excellent than existing subcritical and supercritical extraction technological equipment.

Application Domain

Fatty-oils/fats production

Technology Topic

SolventSlag +10

Image

  • Method for ordinary pressure continuous extraction of grease from schizochytrium limacinum cake and equipment thereof
  • Method for ordinary pressure continuous extraction of grease from schizochytrium limacinum cake and equipment thereof
  • Method for ordinary pressure continuous extraction of grease from schizochytrium limacinum cake and equipment thereof

Examples

  • Effect test(3)

Test Example

[0008] Application example 1 Use 10TPD submerged atmospheric extractor to extract DHA oil from Schizochytrium algal meal
[0009] Schizochytrium algae meal is pressed by a secondary oil press, and the remaining oil content is 8%, and the water content is 10%. About 4t of algae meal is pelletized by a pelletizer, and then enters the extractor through a hopper. The ratio of the feed volume to the solvent flow rate is maintained at 1:1.5 weight ratio, the operating temperature in the extractor is 30°C, the feed rate is 180kg/h, and the material residence time is 90min. After one extraction, the material is discharged as algae residue to obtain 240kg of crude oil. The oil yield is 75%; the attached table 1 shows the test results based on the various indicators of crude oil, indicating that it is similar to the existing general wet extraction process indicators.

Test Example

[0010] Application example 2 Using 50 tons/day submerged atmospheric pressure extractor to extract DHA oil from Schizochytrium algal meal
[0011] The dried Schizochytrium dry mycelium has a fat content of 40% and a water content of 15%. The 40t dry mycelium is first granulated by a granulator, and then expanded and enters the extractor through a hopper. The solvent flow ratio is maintained at 1:1.5 weight ratio, the operating temperature in the extractor is 30°C, the feeding speed is 1800kg/h, and the material residence time is 120min. After the material is extracted once, the material is returned to the extractor through the feed hopper again. After the second extraction, 15.5t of crude oil can be obtained at the end, and the oil yield is 97%; the residual oil rate of algal meal is not higher than 2%; according to the test of the crude oil, it is found that it is in line with the existing general wet extraction process indicators Similarly, the results shown in the attached table 1 are based on the test results of various indicators of crude oil, indicating that it is similar to the existing general wet extraction process indicators.

Test Example

[0012] Application example 3 Extraction process description
[0013] Refer to the instructions attached for typical extraction process figure 2 , The material enters the extractor through the rotary valve, and the solvent enters the extractor after being heated from the other end. The movement direction of the material is opposite to that of the solvent. After extraction:
[0014] A. The mixed oil is discharged from the overflow hole to the mixed oil temporary storage tank, and then pumped into the mixed oil filter. The filtered mixed oil is pumped into the main evaporator through the temporary storage tank for desolvation to obtain crude oil, which is pumped into crude oil In the temporary storage tank, the algae residue produced by the filter enters the airtight conveyor and is treated as B.
[0015] B. The extracted algae residue and the algae residue discharged from the mixed oil filter are airtightly transported to the desolventizing flash evaporator. After the solvent is removed, the algae residue is cooled and dried and discharged as waste. The gas generated during desolventization is passed through the solvent After the condenser is cooled, the liquid is injected into the main evaporator for heating the mixed oil, and the solvent after the heat exchange is returned to the solvent tank for recycling.
[0016] The solvent-containing gas discharged from the C extractor and the solvent-containing gas discharged from the solvent condenser and the solvent-containing gas discharged from the main evaporator are all condensed by the exhaust condenser to recover a small amount of solvent, and then the remaining gas passes through the MOS mineral oil absorption system Drain directly afterwards.
[0017] The index test results of crude oil obtained in application examples 1 and 2 of the attached table
[0018]
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Description & Claims & Application Information

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