Method and system for preparing biodiesel by tubular-variable temperature continuous method

A biodiesel, continuous process technology, applied in the fields of biofuel, petroleum industry, fatty acid esterification, etc., can solve the problem that the sediment device cannot run stably for a long period of time, and achieve the effect of high reaction conversion rate and product yield

Active Publication Date: 2021-10-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] One of the purposes of the present invention is to overcome the defect that the method of the prior art will cause deposits to accumulate in the high-pressure heater when preheating the raw materials for preparing biodiesel, so that the device cannot run stably for a long period of time

Method used

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  • Method and system for preparing biodiesel by tubular-variable temperature continuous method

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Experimental program
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Effect test

Embodiment 1

[0086] The waste oil and methanol are continuously supplied to the first vertical tubular reactor at a rate of 600 g / h and 155 g / h respectively, and the liquid hourly volume space velocity is 1 h -1 , the temperature of the first vertical tubular reactor is 120°C, the pressure is 6Mpa, the liquid phase material flows from bottom to top in the first vertical tubular reactor, while the first vertical tubular reactor The sediment in the tank enters into the sediment collection tank at the bottom of the first vertical tubular reactor by gravity. The first material that escapes from the upper part of the first vertical tubular reactor enters the lower part of the second vertical tubular reactor I, the temperature of the second vertical tubular reactor I is 190 ° C, and the added methanol Amount is 32 grams / hour, and the material after the reaction draws from the top of the second vertical tubular reactor I, and enters the bottom of the second vertical tubular reactor II, the temper...

Embodiment 2

[0096] Waste oil and methanol are continuously supplied to the first vertical tubular reactor at a rate of 600 g / h and 181 g / h respectively, and the liquid hourly volume space velocity is 1.2h -1 , the temperature of the first vertical tube reactor is 140°C, the pressure is 5.7Mpa, the main liquid phase material flows from bottom to top in the first vertical tube reactor, while the first vertical tube The sediment in the first vertical tubular reactor enters into the sediment collection tank at the bottom of the first vertical tubular reactor by gravity. The first material that escapes from the upper part of the first vertical tubular reactor enters the lower part of the second vertical tubular reactor I, the temperature of the second vertical tubular reactor I is 190 ° C, and the added methanol Amount is 46 grams / hour, and the material after the reaction draws from the top of the second vertical tubular reactor I, and enters the bottom of the second vertical tubular reactor I...

Embodiment 3

[0099] Acidified oil and methanol are continuously supplied to the first vertical tubular reactor at a rate of 600 g / h and 167 g / h respectively, and the liquid hourly volume space velocity is 0.7h -1 , the temperature of the first vertical tube reactor is 140°C, the pressure is 4.9Mpa, the main liquid phase material flows from bottom to top in the first vertical tube reactor, while the first vertical tube The sediment in the first vertical tubular reactor enters into the sediment collection tank at the bottom of the first vertical tubular reactor by gravity. The first material that escapes from the upper part of the first vertical tubular reactor enters the lower part of the second vertical tubular reactor I, the temperature of the second vertical tubular reactor I is 210 ° C, and the added methanol Amount is 40 grams / hour, and the material after the reaction draws from the top of the second vertical tubular reactor I, and enters the bottom of the second vertical tubular react...

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Abstract

The invention relates to the field of preparation of biodiesel, and discloses a method and a system for preparing biodiesel by a tubular-variable temperature continuous method. The method comprises: directly introducing raw materials containing grease and alcohol from the lower part of a vertical tubular reactor to a vertical The reaction is carried out in a tubular reactor, and the first material flows out from the upper part of the vertical tubular reactor; the first material is introduced into one or at least two vertical tubular reactors connected in series for the reaction, and the last The upper part of a vertical tubular reactor obtains the second material; the second material is sequentially subjected to de-monohydric alcohol treatment and ester phase and glycerol separation treatment. The method for preparing biodiesel by the tubular-variable temperature continuous method provided by the present invention can avoid the defect that sediments are accumulated in the high-pressure heater when entering the preheater for preheating, which makes the device unable to operate stably for a long period of time.

Description

technical field [0001] The invention relates to the field of biodiesel preparation, in particular to a method for preparing biodiesel by a tubular-variable temperature continuous method and a system for preparing biodiesel by a tubular-variable temperature continuous method. Background technique [0002] Biodiesel can be produced by transesterification of oil and methanol, which refers to the exchange of triglycerides with another alcohol (usually a low-carbon alcohol, such as C 1 -C 8 monohydric alcohol) reaction. Among the products of transesterification, fatty acid esters are biodiesel, monoglycerides, diglycerides, glycerin, alcohol and triglycerides are raw materials. The preparation methods of biodiesel can be divided into acid catalysis, base catalysis, enzyme catalysis and supercritical method. [0003] Disclosed in CN1412278A is a kind of acid catalysis method, the method for preparing biodiesel with high acid value waste animal and vegetable oil, it uses sulfuri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11C3/04C11C3/10C10L1/02
CPCC10L1/02C11C3/04C11C3/10Y02E50/10
Inventor 王海京杜泽学高国强
Owner CHINA PETROLEUM & CHEM CORP
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