CN111205896A - Production process of high-efficiency high-cleanness biomass diesel oil - Google Patents
Production process of high-efficiency high-cleanness biomass diesel oil Download PDFInfo
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- CN111205896A CN111205896A CN202010207559.7A CN202010207559A CN111205896A CN 111205896 A CN111205896 A CN 111205896A CN 202010207559 A CN202010207559 A CN 202010207559A CN 111205896 A CN111205896 A CN 111205896A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/02—Liquid carbonaceous fuels essentially based on components consisting of carbon, hydrogen, and oxygen only
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11C—FATTY ACIDS FROM FATS, OILS OR WAXES; CANDLES; FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS, OILS, OR FATTY ACIDS OBTAINED THEREFROM
- C11C3/00—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom
- C11C3/04—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom by esterification of fats or fatty oils
- C11C3/10—Ester interchange
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention discloses a production process of high-efficiency high-cleanness biodiesel, which is characterized in that agriculture and forestry waste biomass is used as a bio-oil raw material to prepare the bio-oil, and the prepared bio-oil is used for producing the biodiesel by a supercritical method.
Description
Technical Field
The invention relates to the technical field of biodiesel, in particular to a production process of high-efficiency high-cleanness biodiesel.
Background
The biomass gasoline and diesel oil is an energy-saving novel fuel product, is an environment-friendly fuel, and has the remarkable advantages of less tail gas emission, low harmful substance emission and reduction of petroleum dependence. In addition, the raw materials have wide sources and strong reproducibility, and have important strategic significance on the promotion of new energy and the development of environment-friendly energy.
The preparation method of the biomass diesel oil is various, wherein the supercritical method is simple and easy to use, and the biomass diesel oil can be quickly prepared by performing supercritical esterification on the bio-oil; however, this method has some drawbacks, such as: the used biological oil has different varieties, and the components which can not participate in the esterification reaction are various, so that the high-efficiency proceeding of the reaction is influenced, the influence on the yield and the oil product of the prepared biodiesel is larger, and meanwhile, the production cost is increased.
Disclosure of Invention
The invention aims at the problems and discloses a production process of high-efficiency and high-cleanness biomass diesel.
The specific technical scheme is as follows:
the production process of the high-efficiency high-cleanness biomass diesel is characterized by comprising the following specific steps of:
(1) and (b) the molar ratio of (a) to (b) is 15-35: 1, fully mixing and emulsifying methanol and bio-oil, standing for layering, and removing an emulsion to obtain a co-dissolved solution for later use;
(2) pumping the cosolvent solution obtained in the step (1) into a tubular reactor to perform ester exchange reaction in a supercritical state;
(3) after the ester exchange reaction is finished, taking a reaction product, and separating an upper phase liquid and a lower phase liquid;
(4) and catalytically washing the lower phase liquid to obtain glycerol, rectifying the upper phase liquid, condensing the gas phase, recovering methanol, layering the liquid phase, and removing water to obtain the biodiesel.
The production process of the high-efficiency high-cleanness biodiesel comprises the steps of (1) removing the emulsified substances, rectifying the emulsified substances separately, condensing the gas phase, and recovering methanol, wherein the liquid phase is waste oil.
The production process of the high-efficiency high-cleanness biomass diesel oil comprises the step (2), wherein the reaction temperature of the tubular reactor is 310-325 ℃, the reaction pressure is 15-20 Mpa, and the reaction time is 8-12 minutes.
The production process of the high-efficiency high-cleanness biomass diesel oil comprises the following specific steps of:
(a) crushing and drying the biomass raw material, and sieving the crushed and dried biomass raw material with a 20-mesh sieve to obtain dried biomass;
(b) crushing the obtained dried biomass again, and sieving the crushed dried biomass with a 200-mesh sieve to obtain biomass powder;
(c) preheating the biomass powder to 150-180 ℃ through a feeding pipeline, continuously conveying the biomass powder to a pyrolysis reactor for pyrolysis, and pyrolyzing to obtain solid-phase product carbon and gas-phase high-temperature oil gas;
(d) separating ash from the obtained high-temperature oil gas by a separator, condensing, standing for layering, and taking upper-layer oil liquid to obtain a crude bio-oil product;
(e) and removing solid impurities from the crude bio-oil product by a fine filter, separating oil again by an oil-water separator, and taking the separated oil to obtain the bio-oil.
The production process of the high-efficiency high-cleanness biomass diesel oil comprises the steps of preparing biomass raw materials, and preparing a biomass diesel oil from the biomass raw materials.
The production process of the high-efficiency high-cleanness biomass diesel oil comprises the steps of controlling the pyrolysis temperature of the pyrolysis reactor to be 750-820 ℃, controlling the gasification temperature to be 1250-1350 ℃ and controlling the pressure to be 1.8-2.3 MPa during pyrolysis.
In the production process of the high-efficiency high-cleanness biodiesel, the solid-phase product carbon obtained in the step (c) is remained in the pyrolysis reactor to be used as a pyrolysis catalyst, and is jacked up for cleaning.
In the production process of the high-efficiency high-cleanness biodiesel, the high-temperature oil gas obtained in the step (c) is supplied with heat to the feeding pipeline through the heat exchanger in the conveying process, and biomass powder conveyed in the feeding pipeline is preheated.
The production process of the high-efficiency high-cleanness biodiesel comprises the following steps of (d) condensing the non-condensable gas in the step (d) to obtain combustible gas, delivering the combustible gas to power generation equipment to be combusted for power generation, and recovering the lower-layer liquid obtained by condensation to obtain wastewater through wastewater treatment equipment.
The invention has the beneficial effects that:
the invention discloses a production process of high-efficiency high-cleanness biodiesel, which is characterized in that agriculture and forestry waste biomass is used as a bio-oil raw material to prepare the bio-oil, and the prepared bio-oil is used for producing the biodiesel by a supercritical method.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Detailed Description
In order to make the technical solution of the present invention clearer and clearer, the present invention is further described below with reference to embodiments, and any solution obtained by substituting technical features of the technical solution of the present invention with equivalents and performing conventional reasoning falls within the scope of the present invention.
Example one
The production process of the high-efficiency high-cleanness biomass diesel is characterized by comprising the following specific steps of:
(1) and (b) the molar ratio of (a) to (b) is 15-35: 1, fully mixing and emulsifying methanol and bio-oil, standing for layering, and removing an emulsion to obtain a co-dissolved solution for later use;
(2) pumping the cosolvent solution obtained in the step (1) into a tubular reactor to perform ester exchange reaction in a supercritical state;
(3) after the ester exchange reaction is finished, taking a reaction product, and separating an upper phase liquid and a lower phase liquid;
(4) and the lower phase liquid is subjected to catalytic washing to obtain glycerol, the upper phase liquid is rectified, the gas phase is condensed, the methanol is recovered, the liquid phase is layered, and the biomass diesel oil is obtained after water removal;
in the step (1), the effective components (such as fatty acid, fatty acid ester compounds and the like) which can be used for preparing the biodiesel in the biological oil are co-dissolved with the methanol, and form an emulsion with the components which are non-effective components and the methanol, so that the emulsion is removed, the effective degree of supercritical ester exchange can be effectively ensured, and the preparation efficiency and the oil cleanliness of the biodiesel are improved;
wherein the emulsified substances removed in the step (1) are independently rectified, gas phase is condensed, methanol is recovered, a liquid phase is waste oil, the reaction temperature of the tubular reactor in the step (2) is 310-325 ℃, the reaction pressure is 15-20 Mpa, and the reaction time is 8-12 minutes;
the methanol can be recycled and the waste oil can be separated and recycled, but the waste oil has complex components due to the non-uniform raw materials of the bio-oil (see example II), and the description is not provided.
Example two
The production process of the high-efficiency high-cleanness biodiesel according to the embodiment, wherein the bio-oil is obtained by pyrolyzing biomass, and the specific steps are as follows:
(a) crushing and drying the biomass raw material, and sieving the crushed and dried biomass raw material with a 20-mesh sieve to obtain dried biomass;
(b) crushing the obtained dried biomass again, and sieving the crushed dried biomass with a 200-mesh sieve to obtain biomass powder;
(c) preheating the biomass powder to 150-180 ℃ through a feeding pipeline, continuously conveying the biomass powder to a pyrolysis reactor for pyrolysis, and pyrolyzing to obtain solid-phase product carbon and gas-phase high-temperature oil gas;
(d) separating ash from the obtained high-temperature oil gas by a separator, condensing, standing for layering, and taking upper-layer oil liquid to obtain a crude bio-oil product;
(e) and removing solid impurities from the crude bio-oil product by a fine filter, separating oil again by an oil-water separator, and taking the separated oil to obtain the bio-oil.
Wherein the biomass raw material comprises but is not limited to waste biomass of agriculture and forestry industries such as crop straws, fruit shells, branches and the like; during pyrolysis, the pyrolysis temperature of the pyrolysis reactor is controlled to be 750-820 ℃, the gasification temperature is controlled to be 1250-1350 ℃, and the pressure is controlled to be 1.8-2.3 MPa; and (c) remaining the solid-phase product carbon obtained in the step (c) in a pyrolysis reactor, using the solid-phase product carbon as a pyrolysis catalyst, and jacking up for cleaning.
In addition, supplying heat to the feeding pipeline by the heat exchanger during the transportation of the high-temperature oil gas obtained in the step (c), and preheating the biomass powder transported in the feeding pipeline; the waste heat of the high-temperature oil gas can be recycled, the biomass powder which finishes the waste heat can participate in the pyrolysis reaction more quickly, the pyrolysis process is accelerated, and meanwhile, the cost of subsequent oil gas condensation is reduced;
and (d) the non-condensable gas in the condensation process in the step (d) is combustible gas, the combustible gas is sent to power generation equipment to be combusted and generate power, and the lower layer liquid obtained by condensation is wastewater which is recovered by wastewater treatment equipment.
In conclusion, the invention has reasonable design and simple method, is used for preparing the biomass diesel, ensures the effective and efficient production of the biomass diesel by separating ineffective components through a co-dissolving emulsification method, obviously improves the quality of oil products, adopts agricultural and forestry waste biomass as raw materials, has low cost, recovers waste heat when preparing the bio-oil, reduces energy consumption, and has the characteristics of high production and preparation efficiency, low energy consumption and low cost, and the prepared biomass diesel has high cleanliness, high combustion rate and good oil products.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The production process of the high-efficiency high-cleanness biomass diesel is characterized by comprising the following specific steps of:
(1) and (b) the molar ratio of (a) to (b) is 15-35: 1, fully mixing and emulsifying methanol and bio-oil, standing for layering, and removing an emulsion to obtain a co-dissolved solution for later use;
(2) pumping the cosolvent solution obtained in the step (1) into a tubular reactor to perform ester exchange reaction in a supercritical state;
(3) after the ester exchange reaction is finished, taking a reaction product, and separating an upper phase liquid and a lower phase liquid;
(4) and catalytically washing the lower phase liquid to obtain glycerol, rectifying the upper phase liquid, condensing the gas phase, recovering methanol, layering the liquid phase, and removing water to obtain the biodiesel.
2. The process for producing biodiesel with high efficiency and high cleanness as claimed in claim 1, wherein the removed emulsion in step (1) is rectified separately, the gas phase is condensed, methanol is recovered, and the liquid phase is waste oil.
3. The production process of high-efficiency high-cleanness biomass diesel oil as claimed in claim 2, wherein the reaction temperature of the tubular reactor in the step (2) is 310-325 ℃, the reaction pressure is 15-20 Mpa, and the reaction time is 8-12 minutes.
4. The process for producing high-efficiency and high-cleanness biodiesel according to claim 3, wherein the bio-oil is obtained by biomass pyrolysis, and the specific steps are as follows:
(a) crushing and drying the biomass raw material, and sieving the crushed and dried biomass raw material with a 20-mesh sieve to obtain dried biomass;
(b) crushing the obtained dried biomass again, and sieving the crushed dried biomass with a 200-mesh sieve to obtain biomass powder;
(c) preheating the biomass powder to 150-180 ℃ through a feeding pipeline, continuously conveying the biomass powder to a pyrolysis reactor for pyrolysis, and pyrolyzing to obtain solid-phase product carbon and gas-phase high-temperature oil gas;
(d) separating ash from the obtained high-temperature oil gas by a separator, condensing, standing for layering, and taking upper-layer oil liquid to obtain a crude bio-oil product;
(e) and removing solid impurities from the crude bio-oil product by a fine filter, separating oil again by an oil-water separator, and taking the separated oil to obtain the bio-oil.
5. The process for producing high-efficiency high-cleanness biodiesel according to claim 4, wherein the biomass raw material includes but is not limited to agricultural and forestry biomass such as crop straws, fruit shells and branches.
6. The process for producing high-efficiency high-cleanness biodiesel according to claim 5, wherein during pyrolysis, the pyrolysis temperature of the pyrolysis reactor is controlled to be 750-820 ℃, the gasification temperature is controlled to be 1250-1350 ℃, and the pressure is controlled to be 1.8-2.3 MPa.
7. The process for producing biodiesel with high efficiency and high cleanness as claimed in claim 6, wherein the solid product charcoal obtained in step (c) is left in the pyrolysis reactor to be used as a pyrolysis catalyst and is subjected to jacking cleaning.
8. The process for producing high-efficiency and high-cleanness biodiesel according to claim 7, wherein the high-temperature oil gas obtained in the step (c) is conveyed to a feeding pipeline through a heat exchanger to supply heat to the feeding pipeline and preheat biomass powder conveyed in the feeding pipeline.
9. The process for producing biodiesel according to claim 7 or 8, wherein the non-condensable gas in the condensation step (d) is combustible gas, and is sent to a power generation facility for combustion to generate power, and the lower liquid obtained by condensation is wastewater, and is recovered by a wastewater treatment facility.
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| CN202010207559.7A CN111205896A (en) | 2020-03-23 | 2020-03-23 | Production process of high-efficiency high-cleanness biomass diesel oil |
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| CN202010207559.7A CN111205896A (en) | 2020-03-23 | 2020-03-23 | Production process of high-efficiency high-cleanness biomass diesel oil |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101104812A (en) * | 2007-08-06 | 2008-01-16 | 武汉工程大学 | Technique for hypercritical continuous preparation of biological diesel oil and equipment thereof |
| CN101525545A (en) * | 2009-04-13 | 2009-09-09 | 北京海润川投资咨询有限公司 | Industrial continuous agricultural and forestry biomass fast pyrogenation oil refining method and device thereof |
| CN101935593A (en) * | 2010-09-07 | 2011-01-05 | 徐荣江 | Method for preparing biodiesel by adopting supercritical methanol continuous process |
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2020
- 2020-03-23 CN CN202010207559.7A patent/CN111205896A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101104812A (en) * | 2007-08-06 | 2008-01-16 | 武汉工程大学 | Technique for hypercritical continuous preparation of biological diesel oil and equipment thereof |
| CN101525545A (en) * | 2009-04-13 | 2009-09-09 | 北京海润川投资咨询有限公司 | Industrial continuous agricultural and forestry biomass fast pyrogenation oil refining method and device thereof |
| CN101935593A (en) * | 2010-09-07 | 2011-01-05 | 徐荣江 | Method for preparing biodiesel by adopting supercritical methanol continuous process |
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