GB/T 26884-2011Grain and oil machinery - Extractors (English PDF)

Foreword

Appendix A of this standard is a normative appendix. The standard proposed by the National Food Authority. This standard by the National Standardization Technical Committee OILS. This standard was drafted. State Grain Reserve Xi'an Oil Research and Design Institute, Anhui Qingfa Oil Group Limited. The main drafters of this standard. Yang Fan, Duxuan Li, Jiang Wei Wei Hu Huaidong. Oil Machinery extractor

1 Scope

China's national standard for solvent extractors used in oilseed processing. It specifies the terms and definitions, the model designation and basic parameters, the technical requirements, the test methods, the inspection rules and the marking, packaging, transport and storage of extractors, and it applies to the continuous extractors used in oil extraction plants. Solvent extraction is how the overwhelming majority of the world's vegetable oil is actually recovered, because pressing alone leaves several per cent of the oil behind and extraction leaves under one. The extractor is the vessel where it happens: prepared flakes or pressed cake move slowly through it while solvent, normally hexane, percolates counter-currently through the bed - the freshest solvent meeting the most nearly exhausted material and the strongest miscella leaving at the feed end. The counter-current arrangement is what makes the process efficient in solvent, and holding it stable is the whole design problem, since the bed has to be permeable enough to drain and deep enough to hold the material for the residence time required. What makes the machine demanding is not the extraction but the solvent. Hexane is highly flammable, its vapour is heavier than air, and the extractor is a large vessel full of it operating continuously next to rotating machinery: the plant is a hazardous area, the vessel has to be sealed against vapour escape while material flows in and out continuously, and every drive, bearing and instrument penetrating it is a potential leak and ignition source. The standard specifies the extraction performance and residual oil, the solvent ratio and drainage, the sealing, the construction and materials, the drives, the explosion protection and the safety and monitoring provisions. Issued on 29 September 2011 and in force since 1 December 2011.

This standard specifies the terms and definitions extractor, model preparation and basic parameters, technical requirements, test methods, inspection rules, marks, packages Loading, transport and storage requirements. This standard applies to oil extraction plant used continuous extractor.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB 150 steel pressure vessels

GB/T 191 Packaging - Pictorial signs

GB/T 3768 Determination of sound pressure of sound power levels of noise sources using an enveloping surface reflectance measuring surface Simple Method

GB/T 5497 grain and oilseeds - Determination of water test

GB/T 5512 Inspection of grain and grain Determination of fat content

GB/T 8873 Oils Oil Industry Terminology GB/T 13306 signs

GB 16629 vegetable oil extraction solvent

GB/T 24854 grain and oil machinery products packaging technology

GB/T 24856 Oil Machinery casting general technical conditions

GB/T 24857 Oil Machinery plates, steel plate member General technical conditions GB Z158 workplace occupational hazard warning labels JBJ6-1996 mechanical power plant design procedures NB/T 47003.1-2009 welded steel pressure vessel SBJ04 oil extraction factory fire safety norms

3 Terms and Definitions

GB/T 8873 and established in the following terms and definitions apply to this standard.

3.1 Extractor extractor Vegetable oil feedstock by solvent extraction equipment. There are common pan extractor, ring extractor, track extractor.

3.2 Mixed oil miscela Out from the solvent extraction reactor and a mixture of vegetable fats.

3.3 Shipohanrong amount solventcontentinwetmeal From out of the extractor solvent comprises wet wet meal meal quality scores.