CN203238238U - Continuous removing device for biodiesel low fraction - Google Patents
Continuous removing device for biodiesel low fraction Download PDFInfo
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- CN203238238U CN203238238U CN 201320231824 CN201320231824U CN203238238U CN 203238238 U CN203238238 U CN 203238238U CN 201320231824 CN201320231824 CN 201320231824 CN 201320231824 U CN201320231824 U CN 201320231824U CN 203238238 U CN203238238 U CN 203238238U
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- biodiesel
- pump
- outlet
- distillation tower
- sieve plate
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Abstract
The utility model discloses a continuous removing device for biodiesel low fraction. The continuous removing device comprises a feed pump (1), a heat exchanger (2), a double-layer distillation column (3), a reboiler (4), and pump-front condenser (7), a high temperature circulating pump (5) and a high vacuum unit (6), wherein the feed pump is connected with the heat exchanger and is connected with a rough biodiesel inlet a of the distillation column; the distillation column is provided with a backflow adjusting valve d, a sieve plate overflow pipe f is arranged at the lower part in the distillation column, the rough biodiesel inlet a is located above the sieve plate overflow pipe f, a low fraction outlet b is arranged below the tower top condenser, a high vacuum outlet c in the tower top is connected with the pump-front condenser and then is connected with the high vacuum unit, and a rough biodiesel outlet e in the tower bottom is connected with a next level distilling device; the inlet of the high temperature circulating pump is connected with the bottom part of the distillation column, and the outlet of the high temperature circulating pump returns the position below the sieve plate overflow pipe f after passing through the reboiler. The continuous removing device for biodiesel low fraction adopting the structure continuously and completely removes low-boiling-point substance, thereby not only having high production efficiency, but also having good and stable product quality.
Description
Technical field
The utility model relates to the production unit of Organic chemical products biofuel, is specifically related to the low cut of biofuel and removes continuously device.
Background technology
Domestic biofuel company generates biofuel (fatty acid methyl ester) take waste and old vegetable and animals oils (such as sewer oil, hogwash fat) as raw material with the grease in the waste and old vegetable and animals oils, lipid acid and methyl alcohol reaction.Because waste and old vegetable and animals oils source complicacy, in collection, processing, transportation, storage process, can occur becoming sour and degradation process, in the generating portion, the low distillations such as short chain fatty acid, aldehyde, ketone, also have some to be because packing residual other materials of metal bucket such as paint, solvent, mineral wet goods are sneaked in the stock oil.In these low distillations, some is converted into low cut ester class in the biodiesel oil methyl esterizing building-up process, as in, short chain fatty acid and methyl alcohol reaction, generate and hang down the cut fatty acid methyl ester.Contain the biofuel of low cut in the middle of the diesel car use procedure, to automobile oil transportation rubber hose generation swelling action, can have influence on rubber hose work-ing life etc.Above-mentioned these low distillations, if in biofuel distillation production process, do not remove, to have a strong impact on the biofuel quality, the quality index such as its flash-point, cetane value are difficult to reach GB/T20828-2007 " diesel-fuel blending biofuel (BD100) " national standard requirement.Therefore must remove processing through distillation, just can make biofuel reach service requirements.It is main that low cut in the existing biofuel mainly uses shown in Fig. 1～Fig. 4 (column plate in the different structure) flashing tower to remove, concrete use operating process is: open the vacuum system that is connected with mouth of pipe A, after flashing tower reaches the certain vacuum degree, with pump coarse biodiesel is inputted column plate in the flashing tower continuously through the B import, liquid is according to action of gravity, flow from top to down, low distillations step-down under high vacuum state, vaporization, parsing are drawn out of through the A outlet.Although coarse biodiesel is in flashing tower, reach the purpose that removes the low distillations of part by flash distillation, but because tray surfaces is long-pending less in the flashing tower, have influence on the liquid heat exchange area, exist low distillations is removed thoroughly defective, make and produce biofuel and have peculiar smell, flash-point, cetane value, acid number fluctuation are large, unstable product quality, product application is restricted.Because low distillations exists, larger to follow-up biofuel distillation Influence of production, low vacuum appears, and product color is dark, and energy consumption is high, yields poorly, and the problems such as low conversion rate have influence on biofuel and normally produce, and affect simultaneously quality product.Exist and remove low distillations effect finiteness problem in order to overcome flashing tower, guarantee that production equipment normally moves, be necessary to design the low cut of a cover biofuel and remove continuously device, thereby stabilize and increase yield of biodiesel and quality, make the requirement that is up to state standards of biofuel quality.
Summary of the invention
The purpose of this utility model provides the low cut of a kind of biofuel and removes continuously device, and to thoroughly the removing continuously of low-boiling-point substance, not only production efficiency height but also quality product are not only good but also stable when being implemented in biodiesel synthesis.
For realizing above purpose, the low cut of the utility model biofuel removes continuously device and comprises fresh feed pump, is used for coarse biodiesel and the heat exchanger of thermal oil heat exchange, double-deck distillation tower, reboiler, the front condenser of pump, high temperature circulation pump and high vacuum unit; Feed pipe accesses the coarse biodiesel import a of double-deck distillation tower behind fresh feed pump and heat exchanger; Described double-deck distillation tower is provided with return valve d, sieve plate upflow tube f is established in the middle and lower part in the tower, coarse biodiesel import a is positioned at sieve plate upflow tube f top, low cut outlet b is established in the overhead condenser below, the high vacuum outlet c that is located at cat head connects the high vacuum unit by pipeline behind the condenser before pump, the coarse biodiesel outlet e that is positioned at double-deck distillation tower bottom connects the next stage water distilling apparatus; The high temperature circulation pump intake connects the distillation tower bottom, and sieve plate upflow tube f below in the distillation tower is returned in outlet behind reboiler.
Adopt the low cut of said structure biofuel to remove continuously device and have following effect:
1, coarse biodiesel improves and advances distillation tower temperature and low distillations separating effect through the over-heat-exchanger rear feeding;
2, coarse biodiesel and 250 ℃ of thermal oils carry out heat exchange, the coarse biodiesel temperature is brought up to entered the box sparger in double-deck distillation tower middle part about 200 ℃, and the low cut in the coarse biodiesel distills under high vacuum state, resolves, separates;
3, box sparger between packing layer and the sieve plate layer in the middle part of coarse biodiesel being input in the double-deck distillation tower, owing to be subject to the interior upwards pushing effect of thermal medium of distillation tower, low distillations is vaporized and is extracted out by the high vacuum unit, thereby separates with biofuel;
4, adopt ripple packing and sieve plate to increase surface-area in the distillation tower, improve liquid heat exchange area in the tower, increased coarse biodiesel fractionation process repeatedly in distillation tower, simultaneously in order to prevent that greasy filth and fatty acid soaps in the coarse biodiesel from stopping up, distillation tower lower floor adopts sieve-plate structure, and arrange several upflow tubes (f) at every layer of sieve plate, and prevent that distillation tower from stopping up, improve the distillation stable production process;
5, by regulating distillation tower reverse flow valve (d), reduce biofuel and steam from distillation tower (b) mouth with low distillations, improve biofuel distillation yield;
6, adopt large flow high temperature circulation pump and the larger reboiler of heat interchanging area, be conducive to temperature-stable in the double-deck distillation tower, be conducive to simultaneously the coarse biodiesel fractionation by distillation;
7, select the high vacuum unit to improve distillation vacuum tightness, be conducive to separations of vaporizing at a lower temperature of low distillations, the raising separating effect reaches energy-saving and cost-reducing purpose.
Description of drawings
Fig. 1～Fig. 4 is that the low cut in the prior art biofuel removes unit flashing tower structure synoptic diagram.
Fig. 5 is that the low cut of the utility model biofuel removes the apparatus structure synoptic diagram continuously.
Each label in the accompanying drawing: condenser 7, coarse biodiesel import a, low distillations outlet b, high vacuum outlet c, return valve d, coarse biodiesel outlet e, sieve plate upflow tube f before fresh feed pump 1, heat exchanger (coarse biodiesel-thermal oil heat exchange) 2, double-deck distillation tower 3, reboiler 4, high temperature circulation pump 5, high vacuum unit 6, the pump.
Embodiment
Below by the drawings and specific embodiments the low cut of the utility model biofuel being removed device continuously is described in further detail.
As shown in drawings, the low cut of the utility model biofuel removes the front condenser 7 of heat exchanger 2, double-deck distillation tower 3, reboiler 4, pump, high temperature circulation pump 5 and the high vacuum unit 6 that device comprises fresh feed pump 1, is used for coarse biodiesel and thermal oil heat exchange continuously; Feed pipe accesses the coarse biodiesel import a of double-deck distillation tower 3 behind fresh feed pump 1 and heat exchanger 2; Described double-deck distillation tower 3 is provided with return valve d, sieve plate upflow tube f is established in the middle and lower part in the tower, coarse biodiesel import a is positioned at sieve plate upflow tube f top, low cut outlet b is established in the overhead condenser below, the high vacuum outlet c that is located at cat head connects high vacuum unit 6 by pipeline behind the condenser 7 before pump, the coarse biodiesel outlet e that is positioned at double-deck distillation tower bottom connects the next stage water distilling apparatus; High temperature circulation pump 5 entrances connect the distillation tower bottom, and sieve plate upflow tube f below in the distillation tower is returned in outlet behind reboiler 4.
During operation, coarse biodiesel is carried by fresh feed pump (1), with enter the box sparger in double-deck distillation tower middle part after heat-conduction oil heat interchanger (2) heat exchange, coarse biodiesel distills under high vacuum state, wherein the low distillations of a part directly is extracted into the front condenser (7) of pump by high vacuum unit (6), and a part steams from (b) mouth after the condensation of distillation tower overhead condenser in addition; For the intensifying distillation effect, extract coarse biodiesel with large flow high temperature circulation pump 5 out from distillation tower (3) bottom, after reboiler (4) heating, return distillation in the distillation tower, remove the biofuel of most of low cut; Flow automatically to the next stage water distilling apparatus from double-deck distillation tower bottom (e) mouth, and distill out the low low biofuel of cut content, this biofuel reaches GB/T20828-2007 " diesel-fuel blending biofuel (BD100) " national standard requirement.
Followingly list 6 embodiment according to different technical parameters:
1, at coarse biodiesel inlet amount 8.5m
3/ h, 200 ℃ of feeding temperatures, under vacuum tightness (absolute pressure) 700Pa, distill out low cut in the biofuel (contain Myristicin acid methylester following in, short-chain ester) content, drop to 0.50% by 1.00% before transforming;
2, at coarse biodiesel inlet amount 8.0m
3/ h, 205 ℃ of feeding temperatures, under vacuum tightness (absolute pressure) 600Pa, distill out low cut in the biofuel (contain Myristicin acid methylester following in, short-chain ester) content, drop to 0.45% by 1.00% before transforming;
3, at coarse biodiesel inlet amount 7.8m
3/ h, 203 ℃ of feeding temperatures, under vacuum tightness (absolute pressure) 580Pa, distill out low cut in the biofuel (contain Myristicin acid methylester following in, short-chain ester) content, drop to 0.43% by 1.00% before transforming;
4, at coarse biodiesel inlet amount 9.0m
3/ h, 200 ℃ of feeding temperatures, under vacuum tightness (absolute pressure) 750Pa, distill out low cut in the biofuel (contain Myristicin acid methylester following in, short-chain ester) content, drop to 0.52% by 1.00% before transforming;
5, at coarse biodiesel inlet amount 8.8m
3/ h, 201 ℃ of feeding temperatures, under vacuum tightness (absolute pressure) 730Pa, distill out low cut in the biofuel (contain Myristicin acid methylester following in, short-chain ester) content, drop to 0.51% by 1.00% before transforming;
6, at coarse biodiesel inlet amount 8.3m
3/ h, 200 ℃ of feeding temperatures, under vacuum tightness (absolute pressure) 650Pa, distill out low cut in the biofuel (contain Myristicin acid methylester following in, short-chain ester) content, drop to 0.45% by 1.00% before transforming.
Claims (1)
1. the low cut of biofuel removes device continuously, it is characterized in that it comprises fresh feed pump (1), is used for coarse biodiesel and the heat exchanger (2) of thermal oil heat exchange, double-deck distillation tower (3), reboiler (4), the front condenser (7) of pump, high temperature circulation pump (5) and high vacuum unit (6); Feed pipe accesses the coarse biodiesel import (a) of double-deck distillation tower (3) behind fresh feed pump (1) and heat exchanger (2); Described double-deck distillation tower (3) is provided with return valve (d), sieve plate upflow tube (f) is established in the middle and lower part in the tower, coarse biodiesel import (a) is positioned at sieve plate upflow tube (f) top, low cut outlet (b) is established in the overhead condenser below, the high vacuum outlet (c) that is located at cat head connects high vacuum unit (6) by pipeline behind the condenser (7) before pump, the coarse biodiesel outlet (e) that is positioned at double-deck distillation tower bottom connects the next stage water distilling apparatus; High temperature circulation pump (5) entrance connects the distillation tower bottom, and sieve plate upflow tube (f) below in the distillation tower is returned in outlet behind reboiler (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320231824 CN203238238U (en) | 2013-05-02 | 2013-05-02 | Continuous removing device for biodiesel low fraction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320231824 CN203238238U (en) | 2013-05-02 | 2013-05-02 | Continuous removing device for biodiesel low fraction |
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| CN203238238U true CN203238238U (en) | 2013-10-16 |
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| CN 201320231824 Expired - Lifetime CN203238238U (en) | 2013-05-02 | 2013-05-02 | Continuous removing device for biodiesel low fraction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104353257A (en) * | 2014-10-30 | 2015-02-18 | 厦门卓越生物质能源有限公司 | Heating flash distillation device for biodiesel |
-
2013
- 2013-05-02 CN CN 201320231824 patent/CN203238238U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104353257A (en) * | 2014-10-30 | 2015-02-18 | 厦门卓越生物质能源有限公司 | Heating flash distillation device for biodiesel |
| CN104353257B (en) * | 2014-10-30 | 2015-12-16 | 厦门卓越生物质能源有限公司 | Biodiesel heating flash evaporation device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131016 |
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| CX01 | Expiry of patent term |