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Combined rectification column for preparing biological diesel oil

A technology of biodiesel and rectification tower, which is applied in the field of biodiesel preparation equipment, can solve the problems of difficult industrialization, intermittent production cannot complete reaction and separation in one device at the same time, and harsh reaction conditions, so as to achieve no pollution of three wastes , a wide range of applications, the effect of sufficient response

Inactive Publication Date: 2008-12-10
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the shortcomings of the prior art that the reaction conditions for continuous production of biodiesel are harsh, it is difficult to realize industrialization, and the batch production cannot complete the reaction and separation in one device at the same time, the present invention provides a compound method for preparing biodiesel The rectification tower can complete the reaction and separation in the same device, which can realize continuous production, reduce equipment investment and production cost

Method used

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  • Combined rectification column for preparing biological diesel oil

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Effect test

Embodiment 1

[0021] Use as attached figure 1 The structure parameters of the composite rectification tower device shown are: rectification tower diameter 1000mm, tray spacing 300mm, hole diameter 4mm, plate thickness 2mm, weir length 650mm, weir height 50mm, downcomer cross-sectional area / tower cross-section The area is 0.068, the hole area / tray working area is 0.09, the distance between the lower edge of the downcomer and the tray surface is 30mm, the diameter of the filler ceramic Raschig ring is 25mm, the wall thickness of the filler is 2.5mm, and a magnetic sulfonated coal solid catalyst is installed inside. Closed with wire mesh, the height of the packing layer is 3m. The acidified oil with an acid value of 100 enters from the top of the rectification tower with a flow rate of 0.0017m 3 / s, gaseous methanol enters continuously from the bottom of the tower with a flow rate of 0.77m 3 / s, reverse feeding, the temperature of the tower kettle is 120°C. Wire mesh is installed on the tra...

Embodiment 2

[0023] The composite rectification tower as shown in the attached figure is adopted, the garbage oil with an acid value of 20 enters from the top of the rectification tower, and the gaseous ethanol enters continuously from the bottom of the tower, reverse feeding, and the temperature of the bottom of the tower is 130°C. Wherein the rectifying column packing is Raschig ring, and both the tray plate and the packing are loaded with zirconium solid superacid catalyst. The tray spacing is 400mm, the outlet weir height is 120mm, and the number of trays is 100. The unreacted ethanol is condensed by the overhead condenser and then returned to the rectification column for circulation. The generated biodiesel, glycerin and water flow out through the bottom of the tower.

Embodiment 3

[0025] The composite rectification tower as shown in the attached figure is adopted, rapeseed oil is used as the raw material to enter from the top of the rectification tower, gaseous isopropanol is continuously fed from the bottom of the tower, reverse feeding, and the temperature of the bottom of the tower is 110°C. Among them, the rectification column packing is Raschig ring, and the column plate is loaded with γ-Al 2 o 3 NaOH solid basic catalyst. The tray spacing is 400mm, the outlet weir height is 200mm, and the number of trays is 50. The unreacted ethanol is condensed by the overhead condenser and then returned to the rectification column for circulation. The generated biodiesel and glycerol flow out through the tower kettle.

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Abstract

The present invention discloses a combined type fractionating tower device for preparing biological diesel oil, comprising a tower kettle, a fractionating tower body, and an overhead condenser, wherein the two kettle is provided with the fractionating tower body; the fractionating tower body is provided with the overhead condenser; the fractionating tower body is divided into an upper part and a lower part, wherein the upper part is a tower plate rectifying section and consists of the tower wall of the fractionating tower and a plurality of tower plates; the tower wall is uniformly provided with the plurality of tower plates; the tower plate is provided with a web on which a solid catalyst is adhered; the lower part is a filler catalytic reaction section; the filler is filled in the tower wall of the fractionating tower; the solid catalyst is filled into the filler. Grease and gas state alcohol are conversely fed, which quickly contact the surface of the catalyst, and which participate in an esterification reaction along with the tower plate. The reaction products which are biological diesel oil and glycerol flow into the bottom of the kettle, and the surplus gas state alcohol is subjected to the cooling of the overhead condenser, and then returns to the fractionating tower for duty-cycle operation, thereby realizing the processes of reaction and rectifying in the same device.

Description

technical field [0001] The invention relates to a biodiesel preparation device, in particular to a compound rectification tower device for preparing biodiesel. Background technique [0002] With the current environmental and oil price issues becoming increasingly prominent, the use of renewable resources to prepare biodiesel has far-reaching strategic significance. [0003] At present, the preparation method of biodiesel is mainly produced by the esterification or transesterification reaction of oil and alcohol under the action of a catalyst in the reactor, and the obtained product still needs to go through the process of separation and refining, involving many devices and equipment . The current emerging method is to use supercritical method to produce biodiesel without any catalyst. The limitation is that the temperature and pressure required for the reaction are high, the requirements for equipment are high, the investment is larger, and the production cost is increased....

Claims

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Application Information

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IPC IPC(8): C10G3/00C10G7/00
CPCY02E50/10Y02P30/20
Inventor 蒋剑春李翔宇聂小安张天健戴伟娣许玉应浩周永红李书龙
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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