Pre-treatment method used for preparing biodiesel from swill oil and trench oil

A biodiesel and gutter oil technology, applied in biofuel, petroleum industry, fatty acid production, etc., can solve problems such as process instability, incomplete reaction, catalyst failure, etc., achieve obvious overall economic effect, reduce garbage discharge, and improve oil quality Improved effect

Inactive Publication Date: 2014-02-12
SHAANXI DERONG NEW ENERGY
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Problems solved by technology

[0009] The main manifestations of biodiesel production from catering waste oil, mainly swill oil and gutter oil, are: high and unstable water content in raw materials, resulting in catalyst fail

Method used

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  • Pre-treatment method used for preparing biodiesel from swill oil and trench oil

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[0031] The present invention will be further described in conjunction with the embodiments.

[0032] See figure 1 The process steps of the present invention are as follows: buy waste oil, swill oil, etc. that are acceptable through laboratory tests and technical and economic calculations as waste raw material oils, transport them by tankers or drums, direct steam purging, dump or pass through filters The pump assists in unloading into the unloading tank. Two discharge tanks (discharge tank A, discharge tank B) are used alternately. One is used and one is prepared, and the material is discharged alternately when full. When the unloading tank has a large storage capacity, the steam (heat source A) is indirectly heated to keep the waste oil in a liquid state.

[0033] A height-adjustable submersible pump with a filter screen is used to pump material into the acidification tank, and about 20% by mass of acid water (which can be acid-containing wastewater, which saves costs) is added...

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Abstract

The invention discloses a pre-treatment method used for preparing biodiesel from swill oil and trench oil. The pre-treatment method comprises following steps: step 1, swill oil and trench oil are chosen as waste raw oil, and are delivered into a discharging pond; step 2, an acid solution is added, and the mixed solution is heated and mixed so as to realize complete acidification of the waste raw oil; step 3, after acidification, the mixed solution is allowed to stand so as to realize liquid separation, and an upper oil layer, a middle waste water layer and a lower residue layer are obtained; step 4, the upper oil layer is collected, and is filtered so as to remove slag; step 5, after filtration , a concentrated acid is added into the filtered oil layer, and the mixture is boiled by heating so as to realize carbonization polymerization and precipitation separation of a large amount of impurities, and obtained acidized oil; and step 6, the acidized oil is subjected to water washing, dehydrating and decolouring so as to obtain refined waste oil. Beneficial effects of the pre-treatment method are that: the pre-treatment method is capable of preparing refined waste oil, which is low in water content and impurity content, is uniform in quality, and is suitable for application in stable biodiesel production lines, from waste cooking oil with complex composition and nonuniform quality.

Description

Technical field [0001] The invention relates to a biodiesel production process, in particular to a pretreatment process for producing biodiesel by using swill oil and waste oil to prepare refined waste grease meeting the requirements of biodiesel production to ensure the stability of the biodiesel process. Background technique [0002] Biodiesel is a fatty acid monoalkyl ester obtained by transesterification of animal and vegetable oils and alcohols (such as methanol or ethanol). The most typical one is fatty acid methyl ester, represented by BD100, which implements the national standard GB / T20828~2007. Biodiesel blended fuel (B5) implements the national standard GB / T25199~2010. Biodiesel is an excellent supplement and substitute for petrochemical diesel. [0003] In the development process of biodiesel, there have been production methods such as direct mixing method, microemulsification method, pyrolysis method and transesterification method. The direct mixing and micro-emulsifi...

Claims

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Application Information

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IPC IPC(8): C11C3/00C11C1/08C10L1/02
CPCY02E50/13Y02E50/10
Inventor 姚东阳陈涛高静
Owner SHAANXI DERONG NEW ENERGY
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