CN202509041U - Biodiesel continuous rectification system based on multilayer evaporation - Google Patents
Biodiesel continuous rectification system based on multilayer evaporation Download PDFInfo
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- CN202509041U CN202509041U CN2012201151664U CN201220115166U CN202509041U CN 202509041 U CN202509041 U CN 202509041U CN 2012201151664 U CN2012201151664 U CN 2012201151664U CN 201220115166 U CN201220115166 U CN 201220115166U CN 202509041 U CN202509041 U CN 202509041U
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- multilayer
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- condensing surface
- rectifying tower
- tundish
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P30/00—Technologies relating to oil refining and petrochemical industry
- Y02P30/20—Technologies relating to oil refining and petrochemical industry using bio-feedstock
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Abstract
The utility model relates to a biodiesel continuous rectification system based on multilayer evaporation. The system comprises a feeding pump, wherein the feeding pump is connected with a product-raw material heat exchanger, the product-raw material heat exchanger is connected with a multilayer evaporator through a combined condenser, the condenser is arranged above the multilayer evaporator and is connected with a product intermediate tank, the product intermediate tank is connected with a discharge pump, the lower part of the multilayer evaporator is connected with a rectification tower through an intermediate feeding pump, the upper part of the rectification tower is connected with a light constituent intermediate tank through the combined condenser, the light constituent intermediate tank is connected with the product-raw material heat exchanger and a preheater through a reflux pump, and the preheater is connected with the rectification tower. The biodiesel continuous rectification system has the beneficial effects that light constituents such as low-carbon methyl ester of crude biodiesel are cleanly removed through the multilayer evaporator, the subsequent rectification tower system is promoted to maintain higher vacuum degree, the yield is improved, the energy consumption is reduced, and the product yield is improved.
Description
Technical field
The utility model relates to biofuel purification technique field, especially a kind of biofuel continuous rectification system based on the multilayer evaporation.
Background technology
Industry biofuel rectifying is a unit operation that relates to high temperature (temperature of heating thermal oil is controlled between 250～300 ℃ usually) high vacuum (the operation absolute pressure is usually less than 1000Pa), and one of key of operation is exactly keeping of high vacuum condition.The purpose of high vacuum operation mainly contains two aspects: 1) biodiesel fuel component methyl esters boiling point is high, and the high vacuum operation can reduce the methyl esters boiling point, thereby reduces heating medium thermal oil temperature, reduces energy consumption.Biofuel mainly is made up of carbon 16 methyl esters and carbon 18 methyl esters; Because of raw material different; Also can contain a certain amount of low-carbon (LC) methyl esters (carbon number is less than 16) and high-carbon methyl esters (carbon number is greater than 18); The operation absolute pressure is under the 1000Pa condition, and the boiling point of carbon 16 methyl esters, carbon 18 methyl esters still is in higher temperature, between 170 ℃～200 ℃.2) unsaturated link(age) content more (Witconol 2301, methyl linoleate and Linolenic acid methylester etc.) in biodiesel fuel component carbon 18 methyl esters, high vacuum can reduce the methyl esters boiling point, and then reduces the decomposition of methyl esters at the process unsaturated link(age) of high-temperature evaporation.Another key of operation is the residence time control of biofuel heating vaporescence, the long decomposition that also can cause unsaturated link(age) in the methyl esters, and the product acid number raises, color burn, methyl esters rectifying yield descends.
The problem that industry biofuel rectifying also need be considered is exactly an energy recovery.The vaporization heat MV of biofuel is about 65kcal/kg; Specific heat is about 0.5kcal/ (kg. ℃); It is suitable to this means that 1kg biofuel liquid product is as cold as the latent heat of vaporization that heat that room temperature discharges and 1kg methyl esters vapor condensation discharge from temperature of saturation; Thereby heat recuperation should not only consider the methyl esters sensible heat, will consider that also the latent heat of methyl esters reclaims together simultaneously.
Existing industrial biofuel distillation system can not be realized simultaneously aspect above-mentioned three, be respectively: 1) keep higher vacuum tightness; 2) residence time of biofuel can not be controlled in the reboiler; 3) energy recovery.
Chinese patent CN100547056C, CN100503533C, CN201125232Y reboiler in the biofuel rectifying all adopts still formula structure; Because of liquid holdup in the kettle-type reboiler is big, heating coil surface liquid layer is thick, thereby has increased the absolute pressure of methyl esters vaporization; Cause the boiling temperature of biofuel to strengthen; The residence time of heating the vaporescence biofuel simultaneously is also uncontrollable, long biofuel high temperature polymerization and coking, reduction biofuel rectifying yield and the energy consumption height of causing of the residence time.
To the problems referred to above, the said device of Chinese patent CN101033411B adopts the falling film type reboiler, adopts interchanger to reclaim the heat energy of biofuel product simultaneously; Solve the influence of liquid layer thickness preferably to the biofuel vaporescence, yet, because the coarse biodiesel complicated component; Coarse biodiesel is walked tube side in the falling film type reboiler, a small amount of polymerization and coking just cause heating tube to stop up easily under the high temperature, and fouling resistance increases; Cause heat transfer area and overall heat transfer coefficient obviously to descend, cause steam output obviously to descend, be unfavorable for steady running; In addition, the heat (latent heat) that condensation is discharged to the cat head biologics does not reclaim, and whole energy consumption is bigger.
The utility model content
The utility model will solve the shortcoming of above-mentioned prior art, and a kind of biofuel continuous rectification system based on the multilayer evaporation of efficient, low consumption is provided.
The utility model solves the technical scheme that its technical problem adopts: this biofuel continuous rectification system based on the multilayer evaporation, comprise fresh feed pump, and fresh feed pump is connected with product-raw material interchanger; Product-raw material interchanger is connected with the multilayer vaporizer through the combination condensing surface; Multilayer vaporizer top is connected with condensing surface, and condensing surface is connected with the product tundish, and the product tundish are connected with discharging pump; Multilayer vaporizer below is connected with rectifying tower through the intermediate feed pump; Rectifying tower top is connected with the light constituent tundish through the combination condensing surface, and the light constituent tundish are connected with product-raw material interchanger and preheater through reflux pump, the preheater rectifying tower that is linked back.
As preferably, the bottom of said rectifying tower is provided with multilayer evaporation heated tray.
As preferably, the heating tube in the multilayer of said multilayer vaporizer and the rectifier bottoms evaporation heated tray is U type heating tube, and the number of plies of heated tray can be the 3-10 layer.
As preferably, the heating medium of said multilayer vaporizer, rectifier bottoms multilayer evaporation heating unit and preheater all adopts high temperature heat conductive oil.
As preferably, said combination condensing surface is combined by two groups of U type tubular heat exchanges.
As preferably, be equipped with the outlet that is connected with vacuum pump on said combination condensing surface, condensing surface, light constituent tundish and the product tundish.
As preferably, the heat-eliminating medium that said combination condensing surface connects vacuum pump section and condensing surface all adopts water coolant.
A kind of biofuel continuous rectificating technique based on the multilayer evaporation may further comprise the steps:
1) carries through fresh feed pump; The coarse biodiesel raw material is successively through product-raw material interchanger, the preheating of combination condensing surface; Get into the multilayer vaporizer and remove light constituents such as low-carbon (LC) methyl esters; Light constituent steam through with condenser condenses that multilayer vaporizer top is connected after, be collected in the light constituent tundish, carry as biofuel light constituent product through discharging pump;
2) purify coarse biodiesel behind the light constituents such as low-carbon (LC) methyl esters again through the intermediate feed pump delivery; The entering rectifying tower is refining; The coarse biodiesel that gets in the rectifying tower is vaporized by rectifier bottoms multilayer evaporation heated tray, and the combination condenser condenses that biofuel steam warp is connected with the rectifying tower top is collected in the product tundish; Carry through reflux pump; To rectifying tower, discharging is as the biofuel product after product-raw material interchanger cooling for part through the preheater reflux for part, and the rectifier bottoms discharging is biological pitch.
The effect that the utility model is useful is: after one, coarse biodiesel purifies light constituent such as low-carbon (LC) methyl esters through the multilayer vaporizer, impel follow-up rectifying tower body system to keep higher vacuum tightness, improve production capacity, cut down the consumption of energy, improve the yield of product; Two, in multilayer vaporizer and rectifying tower, all adopt shallow liquid layer multilayer evaporation mode heating vaporization, thereby can reduce the heated tray liquid layer thickness; Improve heating tube surface vacuum degree, reduce the heating medium temperature, improve the heating evaporating capacity; Through the number of plies may command coarse biodiesel heating vaporization residence time of heated tray; Eliminate the pyrolytic decomposition and the polymerization that cause because of overstand to the full extent, improve biofuel rectifying yield, improve more than 10% than kettle-type reboiler; Three, through combination condensing surface and product-raw material interchanger, reclaim the condensation latent heat and the sensible heat of high temperature biofuel product, cut down the consumption of energy greatly, energy-conservation more than 50%.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Description of reference numerals: fresh feed pump 1-1, reflux pump 1-2, intermediate feed pump 1-3, discharging pump 1-4, product-raw material interchanger 2, combination condensing surface 3, light constituent tundish 4-1, product tundish 4-2, preheater 5, rectifying tower 6, multilayer vaporizer 7, condensing surface 8.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further:
Embodiment: as shown in Figure 1, this biofuel continuous rectification system based on the multilayer evaporation comprises fresh feed pump 1-1, and A is the coarse biometric material inlet; Fresh feed pump 1-1 is connected with product-raw material interchanger 2, and product-raw material interchanger 2 is connected with multilayer vaporizer 7 through combination condensing surface 3, and the L on the multilayer vaporizer 7 is the thermal oil oil-in, and M is the thermal oil oil outlet; Multilayer vaporizer 7 tops are connected with condensing surface 8, and the O on the condensing surface 8 is a cooling water intake, and P is a cooling water outlet, and N is the vacuum pump interface; Condensing surface 8 is connected with product tundish 4-2, and it is the vacuum pump interface that product tundish 4-2 goes up Q, and product tundish 4-2 is connected with discharging pump 1-4; R is the light constituent products export, and multilayer vaporizer 7 belows are connected with rectifying tower 6 through intermediate feed pump 1-3, and I is the thermal oil oil-in on the rectifying tower 6; J is the thermal oil oil outlet, and rectifying tower 6 tops are connected with light constituent tundish 4-1 through combination condensing surface 3, and C is an entrance of cooling water on the combination condensing surface 3; D is a cooling water outlet, and E is the vacuum pump interface, and it is the vacuum pump interface that light constituent tundish 4-1 goes up H; Light constituent tundish 4-1 is connected with product-raw material interchanger 2 and preheater 5 through reflux pump 1-2, and B is biological diesel product outlet on product-raw material interchanger 2, and F is a heat conductive oil inlet on the preheater 5; G is thermal oil outlet, preheater 5 rectifying tower 6 that is linked back, and rectifying tower 6 below K are biological pitch outlet.
Wherein the bottom of rectifying tower 6 is provided with multilayer evaporation heated tray, plays the effect of rectifying tower reboiler.Heating tube in the multilayer evaporation heated tray of multilayer vaporizer 7 and rectifying tower 6 bottoms is U type heating tube, and the number of plies of heated tray can be the 3-10 layer.
Combination condensing surface 3 is combined by two groups of U type tubular heat exchanges.Be equipped with the outlet that is connected with vacuum pump on combination condensing surface 3, condensing surface 8, light constituent tundish 4-1 and the product tundish 4-2.
The heating medium of multilayer vaporizer 7, rectifying tower 6 bottom multilayer evaporation heating units and preheater 5 all adopts high temperature heat conductive oil.The heat-eliminating medium that combination condensing surface 3 connects vacuum pump section and condensing surface 8 all adopts water coolant.
This biofuel continuous rectificating technique based on the multilayer evaporation may further comprise the steps:
1) carries through fresh feed pump 1-1; The coarse biodiesel raw material is successively through product-raw material interchanger 2,3 preheatings of combination condensing surface; Get into multilayer vaporizer 7 and remove light constituents such as low-carbon (LC) methyl esters; Light constituent steam through with condensing surface 8 condensations that multilayer vaporizer 7 tops are connected after, be collected in light constituent tundish 4-2, carry as biofuel light constituent product through discharging pump 1-4;
2) coarse biodiesel that purifies behind the light constituents such as low-carbon (LC) methyl esters is carried through intermediate feed pump 1-3 again; It is refining to get into rectifying tower 6; The coarse biodiesel that gets in the rectifying tower 6 is vaporized by rectifying tower 6 bottom multilayer evaporation heated tray, and combination condensing surface 3 condensations that biofuel steam warp is connected with rectifying tower 6 tops are collected in product tundish 4-1; Carry through reflux pump 1-2; To rectifying tower 6, discharging is as the biofuel product after product-raw material interchanger 2 coolings for part through preheater 5 reflux for part, and rectifying tower 6 bottom discharges are biological pitch.
Except that the foregoing description, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (7)
1. biofuel continuous rectification system based on multilayer evaporation; Comprise fresh feed pump (1-1); It is characterized in that: fresh feed pump (1-1) is connected with product-raw material interchanger (2), and product-raw material interchanger (2) is connected with multilayer vaporizer (7) through combination condensing surface (3), and multilayer vaporizer (7) top is connected with condensing surface (8); Condensing surface (8) is connected with product tundish (4-2); Product tundish (4-2) are connected with discharging pump (1-4), and multilayer vaporizer (7) below is connected with rectifying tower (6) through intermediate feed pump (1-3), and rectifying tower (6) top is connected with light constituent tundish (4-1) through combination condensing surface (3); Light constituent tundish (4-1) are connected with product-raw material interchanger (2) and preheater (5) through reflux pump (1-2), preheater (5) rectifying tower (6) that is linked back.
2. the biofuel continuous rectification system based on the multilayer evaporation according to claim 1 is characterized in that: the bottom of said rectifying tower (6) is provided with multilayer evaporation heated tray.
3. the biofuel continuous rectification system based on the multilayer evaporation according to claim 2; It is characterized in that: the heating tube in the multilayer evaporation heated tray of said multilayer vaporizer (7) and rectifying tower (6) bottom is U type heating tube, and the number of plies of heated tray can be the 3-10 layer.
4. the biofuel continuous rectification system based on the multilayer evaporation according to claim 2 is characterized in that: the heating medium of said multilayer vaporizer (7), rectifying tower (6) bottom multilayer evaporation heating unit and preheater (5) all adopts high temperature heat conductive oil.
5. the biofuel continuous rectification system based on the multilayer evaporation according to claim 1, it is characterized in that: said combination condensing surface (3) is combined by two groups of U type tubular heat exchanges.
6. according to claim 1 or 5 described biofuel continuous rectification systems, it is characterized in that: be equipped with the outlet that is connected with vacuum pump on said combination condensing surface (3), condensing surface (8), light constituent tundish (4-1) and the product tundish (4-2) based on the multilayer evaporation.
7. the biofuel continuous rectification system based on the multilayer evaporation according to claim 6, it is characterized in that: the heat-eliminating medium that said combination condensing surface (3) connects vacuum pump section and condensing surface (8) all adopts water coolant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201151664U CN202509041U (en) | 2012-03-23 | 2012-03-23 | Biodiesel continuous rectification system based on multilayer evaporation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201151664U CN202509041U (en) | 2012-03-23 | 2012-03-23 | Biodiesel continuous rectification system based on multilayer evaporation |
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| CN202509041U true CN202509041U (en) | 2012-10-31 |
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| CN2012201151664U Withdrawn - After Issue CN202509041U (en) | 2012-03-23 | 2012-03-23 | Biodiesel continuous rectification system based on multilayer evaporation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102604665A (en) * | 2012-03-23 | 2012-07-25 | 浙江工业大学 | Multilayer-evaporation-based bio-diesel continuous rectification system and process |
-
2012
- 2012-03-23 CN CN2012201151664U patent/CN202509041U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102604665A (en) * | 2012-03-23 | 2012-07-25 | 浙江工业大学 | Multilayer-evaporation-based bio-diesel continuous rectification system and process |
| CN102604665B (en) * | 2012-03-23 | 2014-11-12 | 浙江工业大学 | Multilayer-evaporation-based bio-diesel continuous rectification system and process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121031 Effective date of abandoning: 20141112 |
|
| RGAV | Abandon patent right to avoid regrant |