Continuous esterification and ester exchange process used for producing biodiesel
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A biodiesel, transesterification technology, applied in the petroleum industry, biofuels, fatty acid esterification and other directions, can solve problems such as increased energy consumption, and achieve the effect of extensive raw material adaptability
Inactive Publication Date: 2010-07-21
刘宽 +3
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For a stirred tank reactor, although the input of mixing energy can make the droplets thinner, thereby increasing the mass transfer interface, but to make the droplets thin enough, it must input enough mixing energy, which reduces the energy consumption greatly increase
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Embodiment 1
[0026] process such as figure 1 and figure 2 shown. The esterification fiber membrane reactor R1 is cylindrical with a height of 3000 mm and a diameter of 500 mm, filled with metal fibers with a diameter of 0.1 mm (provided by Nanjing Jinlian Technology Co., Ltd., the same below). The transesterification fiber membrane reactor R2 is cylindrical with a height of 3000mm and a diameter of 500mm, filled with metal fibers with a diameter of 0.1mm. The diameter of the water separation part of the fiber membrane water separator F1 is 600mm and the height is 5000mm.
[0027] One-level esterification feed, acid number 152mgKOH / g, water content is less than 1%, waste oil of saponification value 186, feed rate is 2000kg / hour, methanol (98%) feed rate is 400kg / hour, sulfuric acid ( 98%) feed rate was 16 kg / hour.
[0028] 12000kg / hour of material from the esterification fiber membrane reactor R1 returns to the esterification mixing tank R1, and the rest enters the methanol removal t...
Embodiment 2
[0034] One-level esterification feed, acid value 122mgKOH / g, water content is less than 1%, the acidified palm oil of saponification value 198, feed rate is 2000kg / hour, methanol (98%) feed rate is 400kg / hour, sulfuric acid (98%) The feed rate was 16 kg / hour. 12000kg / hour of material from the esterification fiber membrane reactor R1 returns to the esterification mixing tank R1, and the rest enters the methanol removal tower T1.
[0035] Secondary esterification feed, methanol (98%) feed rate is 200kg / hour, sulfuric acid (98%) feed rate is 4kg / hour. 12000kg / hour of material from the esterification fiber membrane reactor returns to the esterification mixing tank R1, and the rest enters the methanol removal tower.
[0036] Feed for transesterification, methanol (98%) feed rate is 200 kg / hour, solid KOH feed rate is 12 kg / hour. 11,000kg / hour of material from the transesterification fiber membrane reactor R2 returns to the transesterification mixing tank R2, and the rest enters...
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Abstract
The invention relates to a continuous esterification and ester exchange process used for producing biodiesel, which comprises the following steps of: continuously delivering high-acid value oil, carbinol and an acid catalyst to an esterification mixing tank G1, stirring and mixing and then pumping into an esterification fibrous membrane reactor R1 by a pump B1; after reaction, entering a carbinol-removing tower T1 to remove carbinol; pumping carbinol-removed materials into a fibrous membrane water knockout vessel F1 by a pump B2; after acid-contained wastewater is separated out, delivering to a secondary reaction system; completely repeating the processes in the secondary reaction system after the carbinol and the acid catalyst are supplemented; delivering water-knocked out materials to an ester exchange system; delivering the materials from an esterification system and the carbinol and the acid catalyst to an ester exchange mixing tank G2; stirring and mixing and then pumping into an ester exchange fibrous membrane reactor R2 by a pump B3; entering a carbinol-removing tower T2 after the ester exchange reaction to steam off the carbinol; pumping the carbinol-removed materials into a setting tank G3 by a pump 4; and then settling and separating glycerol to obtain biodiesel. Since the fibrous membrane high-efficiency mass transfer reactor is used by the process, the speed of generating fatty acid methyl ester is greatly increased.
Description
technical field [0001] The invention relates to a continuous process for generating fatty acid methyl ester through esterification and transesterification of raw material oil ester and methanol under the action of a catalyst in the field of biodiesel industry. technical background [0002] Due to the shortage of petroleum resources, energy needs to be replaced, and the development of alternative energy and renewable energy has become a strategic issue for major countries in the world. Therefore, once the concept of biodiesel appeared, it has been widely concerned by countries all over the world. Due to the performance advantages of biodiesel itself (such as good combustion performance, lubricating performance, safety performance and excellent environmental friendliness performance), many countries have carried out the development and production of biodiesel. [0003] From the perspective of chemical reaction, the production of biodiesel is just an esterification and transes...
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