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Device and method for preparing biodiesel by rapid reaction in rotating fixed bed

A biodiesel and fast-response technology, applied in biofuels, petroleum industry, fatty acid esterification, etc., can solve problems such as uneven heat and mass transfer, low esterification reaction rate, untimely product separation, etc., and achieve easy manufacturing , save investment costs, good effect of reaction and mixing

Active Publication Date: 2020-07-21
SHANDONG UNIV OF TECH
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  • Description
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Problems solved by technology

[0010] The purpose of the present invention is to solve the problems of low esterification reaction rate, long reaction time, uneven heat and mass transfer, untimely product separation, etc., to provide a device and method for preparing biodiesel by rapid reaction in a rotating fixed bed, and to improve the unit output of the equipment , to achieve high-efficiency continuous production of biodiesel

Method used

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  • Device and method for preparing biodiesel by rapid reaction in rotating fixed bed

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Embodiment 1

[0036] according to figure 1Connect the various parts, and the raw oil is acidified oil with an acid value of 137.23 mgKOH / g. The acidified oil is pretreated before use, first filtered to remove impurities inside, and then rotary steamed to remove water. Methanol is first passed into a 500 mL fixed-bed reactor equipped with a cation exchange resin catalyst, which reaches about 80% of the volume of the reactor. 65 o C circulating hot water through the jacket to heat the reaction, and at the same time turn on the rotating device at a speed of 1000 r / min. The acidified oil was passed into the rotating fixed bed reactor at 5.0 mL / min. As the reaction progressed, observe the stratification of the lower cone product in time, and take samples every 10 min. Sample at 75 o Rotary steam for 15 minutes at C, then measure the acid value of the product according to GB / T 5530-2005 "Animal and Vegetable Fats and Fats - Determination of Acid Value and Acidity", and use formulas (1) and (...

example 2

[0040] according to figure 1 Connect the components, and select the raw oil as waste cooking oil with an acid value of 16.08 mgKOH / g. Waste cooking oil is pretreated before use, first filtered to remove impurities inside, and then rotary steamed to remove water. Methanol is first passed into a 1 L fixed-bed reactor equipped with a cation exchange resin catalyst, and passes to about 80% of the volume of the reactor. 65 o C circulates hot water through the jacket to heat the reaction, and at the same time turns on the rotating device at a speed of 3000 r / min. Waste cooking oil was passed into the rotating fixed bed reactor at 10.0 mL / min. As the reaction progressed, observe the stratification of the lower cone product in time, and take samples every 10 min. Sample at 75 o Rotary steam for 15 minutes at C, then measure the acid value of the product according to GB / T 5530-2005 "Animal and Vegetable Fats and Fats - Determination of Acid Value and Acidity", and use formulas (1)...

example 3

[0044] according to figure 1 Connect the parts, and the raw material oil is jatropha oil with an acid value of 36.10 mgKOH / g. Methanol is first passed into a 250 mL fixed-bed reactor equipped with a cation exchange resin catalyst, to about 80% of the volume of the reactor. 30 o C Circulating hot water passes through the jacket to heat the reaction, and at the same time, the rotating device is turned on at a speed of 600 r / min. Jatropha oil was passed into the rotating fixed-bed reactor at 2.0 mL / min. As the reaction progressed, observe the stratification of the lower cone product in time, and take samples every 10 min. Sample at 75 o Rotary steam at C for 15 minutes, then measure the acid value of the product according to GB / T 5530-2005 "Determination of Acid Value and Acidity of Animal and Vegetable Oils and Fats", and use formulas (1) and (2) to calculate the acid value and conversion rate. See Table 3 for specific data.

[0045] Table 3 Reaction temperature 30 o C, T...

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Abstract

The invention provides a device and method for preparing biodiesel with a rotating fixed bed rapid reaction, which is mainly composed of a fixed bed reactor with a rotating shaft (9). First, the reactant methanol is added to the fixed-bed reactor filled with solid catalyst, and at the same time, the motor (12) is turned on to make the reactor rotate. Control the dripping flow rate of raw oil to realize rapid reaction between oil and excess methanol. Rotation can not only increase the contact opportunities between reactants and catalysts, occupy more active sites, but also promote the sinking and separation of fatty acid methyl esters. The setting of the liquid redistributor avoids the uneven distribution of the liquid due to the rotation and centrifugation. Observe the delamination of the sight cup (21), and remove the product in time. Excess methanol, timely removal of products and rotating reactor can all speed up the forward progress of the reversible reaction. The invention has the advantages of simple operation, high raw material utilization rate and high esterification efficiency, and can be used for rapid and continuous preparation of biodiesel.

Description

technical field [0001] The invention belongs to the technical field of chemical equipment and biodiesel, and in particular relates to a device and method for preparing biodiesel by rapid reaction of a rotating fixed bed, which is mainly used for rapid generation and separation of biodiesel to realize efficient continuous production. Background technique [0002] With the sharp decline of oil reserves and the serious environmental problems caused by the use of fossil fuels, countries all over the world hope to find new energy sources that are both environmentally friendly and renewable. Biodiesel is a kind of green and environment-friendly energy that has received considerable attention in the past ten years. It uses biological lipids as raw materials and obtains long-chain fatty acid mono-alkyl esters through transesterification with short-chain alcohols. The properties of biodiesel, such as viscosity and calorific value, are similar to those of petrochemical diesel. In add...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11C3/04C10L1/02
CPCC10L1/02C11C3/04Y02E50/10
Inventor 丁金成马玲玲卢杰吕恩民
Owner SHANDONG UNIV OF TECH
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