Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of method utilizing screw machine to prepare biodiesel

A biodiesel, screw machine technology, applied in biofuel, petroleum industry, fatty acid production and other directions, can solve the problems of easy aging of catalysts, low space velocity reaction, high reaction temperature, improve aging resistance, reduce reaction temperature, and improve reaction The effect of efficiency

Inactive Publication Date: 2017-03-15
SICHUAN YANGMING ENERGY TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Aiming at the defects of low space velocity reaction, high reaction temperature, low reaction efficiency and easy aging of the catalyst in the preparation of biodiesel by hydrogenation catalyst cracking, the present invention provides a method for preparing biodiesel by using a screw machine

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of method utilizing screw machine to prepare biodiesel
  • A kind of method utilizing screw machine to prepare biodiesel
  • A kind of method utilizing screw machine to prepare biodiesel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1) Inject rapeseed oil into the preheated two-stage twin-screw machine with the first stage co-meshing, the screw length-to-diameter ratio is 30, the screw diameter is 35mm, and the temperature settings of each reaction section are 80-100°C, 100- 120°C, 100-110°C, 100-90°C, 90-80°C, the first-stage screw head pressure is 1MPa, the host speed is 200 rpm, and vacuum devolatilization is set between the second and third stage heating to exclude The water in the grease, the hydrogen pump is installed in the third and fourth stage heating, and the hydrogen is pumped in. The head is equipped with a porous plate made of tungsten oxide loaded on bauxite and sintered by bauxite. Through the dispersion and constant pressure of the first stage screw machine, the Grease and hydrogen form a homogeneous reaction interface, and quickly catalyze hydrogenation;

[0045] 2) After catalytic hydrogenation of the first-stage screw, it enters the second-stage co-meshing of the two-stage screw...

Embodiment 2

[0050] 1) Inject soybean oil into the first stage of the preheated two-stage twin-screw machine, the screw length-to-diameter ratio is 25, the screw diameter is 40mm, and the temperature settings of each reaction section are 80-100°C, 100-120°C ℃, 100-110℃, 100-90℃, 90-80℃, the pressure of the first-stage screw head is 2MPa, the speed of the main engine is 28 rpm, and vacuum devolatilization is set between the second and third heating stages to remove grease The moisture in the medium is installed in the third and fourth stage heating room, and the hydrogen is pumped in. The head is equipped with a porous plate made of nickel phosphide loaded on bauxite and sintered by bauxite. Through the dispersion and constant pressure of the first stage screw machine, the Grease and hydrogen form a homogeneous reaction interface, and quickly catalyze hydrogenation;

[0051] 2) After the catalytic hydrogenation of the first-stage screw, it enters the second-stage counter-meshing of the doub...

Embodiment 3

[0056]1) Inject the grease recovered from the kitchen into the first-stage counter-meshing of the preheated two-stage twin-screw machine. The length-to-diameter ratio of the screw is 40, and the diameter of the screw is 45mm. The temperature settings of each reaction section are 80-100°C, 100°C -120°C, 100-110°C, 100-90°C, 90-80°C, the first-stage screw head pressure is 2MPa, the host speed is 300 rpm, vacuum devolatilization is set between the second and third stage heating, Remove the moisture in the grease, install a hydrogen pump between the third and fourth stage heating, pump in the hydrogen, and set the porous plate made of copper oxide loaded on the bauxite sintered in the head, through the dispersion and constant pressure of the first stage screw machine, Make oil and hydrogen form a homogeneous reaction interface, and quickly catalyze hydrogenation;

[0057] 2) After the catalytic hydrogenation of the first-stage screw, it enters the second-stage co-meshing of the do...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
acid valueaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing biodiesel by a screw extruder. According to the method, animal and plant grease is adopted as a main material, a two-step double-screw extruder is adopted as a continuous reactor and a one-step competition of catalytic hydrogenation, isomerization, dehydration and degassing is achieved when biodiesel is continuously produced by virtue of the functions of continuous dispersion, shearing, constant-pressure flow, reflowing, devolatilization and transporting of the continuous reactor through a two-step structure. In the method, by adopting the two-step double-screw extruder as the reactor, grease can be subjected to different reactions at different stages by virtue of the combination of screw blocks in the extruder, the shearing dispersion is carried out in a first stage, grease and hydrogen are quickly subjected to catalytic hydrogenation under the action of strong shearing and thus liquid space velocity and the reaction efficiency are improved and the continuous isomerization and devolatilization treatment at a high temperature and a constant pressure are carried out in the second stage. Compared with the traditional reactor, the method disclosed by the invention adopts continuous dynamic propeller-type reaction, under the conditions of transverse shearing and radial pressure of the screw, the high temperature and the high pressure are generated in a short time and the catalytic hydrogenation and the isomerization are quickly completed, the reaction efficiency is high and the biodiesel has high quality and stable quality.

Description

technical field [0001] The invention relates to the field of biodiesel, in particular to a method for preparing biodiesel by using a screw machine. Background technique [0002] Esterification or transesterification of triglycerides, the main component of vegetable oils or animal oils, into long-chain fatty acid monoesters is currently the main way to produce biodiesel. Since biodiesel feedstock can be regenerated, it shows good environmental protection and sustainability, and becomes a good substitute for diesel. Vigorously developing biodiesel has important strategic significance for sustainable economic development, promoting energy substitution, reducing environmental pressure, and controlling urban air pollution. Therefore, the research and application promotion of biodiesel has developed quite rapidly in recent years. [0003] The main raw material of biodiesel is animal and vegetable oils. Fatty acid esters can be obtained through transesterification of oils and low...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C11C3/00C11C3/12C11C3/14C10L1/02
CPCY02E50/10
Inventor 张辉陈庆
Owner SICHUAN YANGMING ENERGY TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com