CN108384636A - A kind of solvent recovery unit - Google Patents
A kind of solvent recovery unit Download PDFInfo
- Publication number
- CN108384636A CN108384636A CN201810404748.6A CN201810404748A CN108384636A CN 108384636 A CN108384636 A CN 108384636A CN 201810404748 A CN201810404748 A CN 201810404748A CN 108384636 A CN108384636 A CN 108384636A
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- Prior art keywords
- tower
- solvent
- condenser
- freezing
- gas
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Classifications
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B1/00—Production of fats or fatty oils from raw materials
- C11B1/10—Production of fats or fatty oils from raw materials by extracting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/02—Solvent extraction of solids
- B01D11/0292—Treatment of the solvent
- B01D11/0296—Condensation of solvent vapours
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of solvent recovery unit, including condenser, compensator, absorption tower, condensing tower, freezing tower, it is provided with the air inlet pipe inputted for solvent vapour to be recycled above condenser, condenser is used for the condensation of solvent vapour；It is connected below compensator and condenser, the balance and stability of residual solvent steam is to form it into free gas after compensator is condensed for condensed device；It is connected with compensator below absorption tower, absorption tower is used for the absorption of solvent in free gas；It is connected with absorption tower top above condensing tower, first condensation of the condensing tower for the free gas after the lyosoption of absorption tower；It is connected with condensing tower lower section below freezing tower, again condensation of the freezing tower for the free gas after the lyosoption of absorption tower；Condenser, compensator, absorption tower, condensing tower, freezing tower bottom are both provided with for condensate drain derived from solvent after condensing.The solvent recovery unit can effectively realize the condensing recovery of n-hexane steam.
Description
Technical field
The present invention relates to chemical fields, more specifically, more particularly to a kind of solvent recovery unit.
Background technology
Leaching refining method is to select certain that can dissolve the organic solvent of grease, by oil plant using the principle of extraction
Contact (impregnate or spray), a kind of method for producing oil for making the grease in oil plant be extracted out.The basic mistake of leaching refining method
Journey is that first oil plant embryo (or pre-pressed cake) is dipped in selected solvent, and lipid solubilization is then made to form miscella in solvent, then
Miscella is detached with solid residue (dregs of rice), miscella is evaporated according to different boiling points finally, is stripped, solvent evaporation is made
Become steam to detach with oil, to obtain grease (Extractive crudeoil).Wherein, solvent vapour is then subsequent by condensation, cooling recycling
It is continuous to use.Since leaching refining method is high with oil yield, the plurality of advantages such as labor intensity is low, therefore obtained extensively in liquefaction field
General adaptation.
Presently, the solvent generally used in leaching refining method be with n-hexane No. 6 extraction solvents as main component,
N-hexane is and cheap to grease good dissolubility, and source is sufficient, therefore worldwide generally uses.It is practical
In operation, due to lacking the solvent recovery unit specifically for n-hexane in the prior art, in this way, part is caused to contain n-hexane
Steam be disposed in air, and n-hexane has certain toxicity and cumulative effect, can enter from respiratory tract and skin
Human body generates 2,5- acetyl butyryls by liver metabolism, influences human central nervous system and motor nerve cells and cause in human body
Poison significantly impacts the health of human body；In addition, n-hexane steam can destroy ozone through photochemical degradating in an atmosphere, easily
The pollution of environment is caused to destroy, after scientific research for many years and investigation, nineteen ninety U.S. Clean Air Act case formally will just
Hexane is classified as one of 189 air pollution harmful substances.
Invention content
The technical problem to be solved in the present invention is to provide a kind of solvent recovery unit, which passes through its structure
Design, can effectively realize the condensing recovery of n-hexane steam, effectively prevent it to affect human health, avoid it to ring
Border pollutes destruction.
A kind of solvent recovery unit, including condenser, compensator, absorption tower, condensing tower, freezing tower, wherein：
The air inlet pipe inputted for solvent vapour to be recycled is provided with above the condenser, the condenser is used for solvent
The condensation of steam；
It is connected below the compensator and the condenser, the compensator is used for remaining after condenser condensation
The balance and stability of solvent vapour is to form it into free gas；
It is connected with the compensator below the absorption tower, the absorption tower is used for the absorption of solvent in free gas；
It is connected with absorption tower top above the condensing tower, the condensing tower is used to absorb through the absorption tower molten
The first condensation of free gas after agent；
It is connected with condensing tower lower section below the freezing tower, the freezing tower is used to absorb through the absorption tower molten
The condensation again of free gas after agent；
The condenser, the compensator, the absorption tower, the condensing tower, the freezing tower bottom are both provided with use
The condensate drain derived from solvent after condensation.
Preferably, cooling water ingress pipe is provided with below the condenser, being provided with cooling water above the condenser leads
Outlet pipe.
Preferably, it is provided with the first gas-guide tube communicated with outside at the top of the compensator, is set in first gas-guide tube
It is equipped with first check-valve.
Preferably, first gas distributor, the absorption tower are provided at the gas access below the absorption tower inner cavity
It is provided with stainless steel cloth packing layer and cooling water distributor above inner cavity and the cooling water distributor is located at the stainless steel
Above wire packing layer.
Preferably, ice water tank, the ice water tank and the condensing tower are communicated with outside the condensing tower and the freezing tower
Between be provided with water pump, be provided with compression refigerating machine between the ice water tank and the freezing tower.
Preferably, second gas distributor, the freezing tower are provided at the gas access below the freezing tower inner cavity
It is provided with coil pipe above inner cavity, the coil pipe is connected with the ice water tank and the compression refigerating machine.
Preferably, the freezing top of tower is provided with the second gas-guide tube communicated with outside, is set in second gas-guide tube
It is equipped with second check-valve.
The beneficial effects of the invention are as follows：The solvent recovery unit provided by the invention, can be effective by its structure design
The condensing recovery for realizing n-hexane steam, effectively prevent it to affect human health, it is avoided to pollute the environment brokenly
It is bad.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the overall structure diagram of the solvent recovery unit disclosed in the embodiment of the present invention.
Specific implementation mode
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, technical solutions in the embodiments of the present application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.
Based on the embodiment in the application, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present application.
In the description of the present invention, it is to be understood that, term " top ", " bottom ", " top ", " lower section ", " left side ",
The orientation or positional relationship of instructions such as " right sides " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing this hair
Bright and simplified description, does not indicate or imply the indicated device or element must have a particular orientation, with specific orientation
Construction and operation, therefore be not considered as limiting the invention.
A kind of specific embodiment of solvent recovery unit of the present invention is provided referring to Fig. 1, Fig. 1, wherein Fig. 1 is the present invention
The overall structure diagram of solvent recovery unit disclosed in embodiment.
As shown in Figure 1, solvent recovery unit provided in this embodiment can realize effective recycling of solvent.The solvent recovery fills
It sets including condenser 1, compensator 2, absorption tower 3, condensing tower 4, freezing tower 5, condenser 1, compensator 2, absorption tower 3, condensing tower
4,5 bottom of freezing tower is both provided with for condensate drain 6 derived from solvent after condensing.
In Fig. 1, arrow direction indicates the flow direction of water or gas, wherein condenser 1, compensator 2, absorption tower in Fig. 1
3, condensing tower 4, freezing tower 5 are arranged in order from left to right.
In the present embodiment, 1 top of condenser is provided with the air inlet pipe 101 inputted for solvent vapour to be recycled, condenser 1
Condensation for solvent vapour.Leftmost tower body is condenser 1 in Fig. 1.
Compensator 2 is connected with 1 lower section of condenser, and residual solvent steam is flat after compensator 2 is condensed for condensed device 1
Weighing apparatus is stablized to form it into free gas.In this way, after the condensed device 1 of fat extracting solvent steam condenses, contain a small amount of solvent
Gas enters compensator 2 and forms free gas.
3 lower section of absorption tower is connected with compensator 2, and absorption tower 3 is used for the absorption of solvent in free gas.The present embodiment
In, it is provided with first gas distributor 301 at the gas access below 3 inner cavity of absorption tower, to which free gas can be along absorption
The entire inner cavity lower section of tower 3 up flows, meanwhile, be provided with above 3 inner cavity of absorption tower stainless steel cloth packing layer 302 with it is cold
But water distributor 303, cooling water distributor 303, which is conducted with external coolant intake pipe and cools down water distributor 303, to be located at
302 top of stainless steel cloth packing layer.
Rise to 3 middle part of absorption tower, top after gas distributor 301 in this way, free gas enters 3 bottom of absorption tower,
The cooling water at 3 top of absorption tower uniformly declines after cooling water distributor 303, the stainless steel cloth packing layer at 3 middle part of absorption tower
302 make the cooling water of the free gas of rising and decline come into full contact with, and cooling water is rapid by solvent remaining in free gas
Condensed absorbent entrainment is fallen down, and absorbs the water to get off and solvent enters condensate drain 6 and exports to the processing of peripheral hardware diversion box, free gas
Body go successively to 3 rear of absorption tower be connected congeal in tower 4.
4 top of condensing tower is connected with 3 top of absorption tower, and condensing tower 4 is used for the free gas after 3 lyosoption of absorption tower
First condensation.5 lower section of freezing tower is connected with 4 lower section of condensing tower, and freezing tower 5 is used for after 3 lyosoption of absorption tower freely
The condensation again of gas.The tower body of rightmost is to freeze tower 5 in Fig. 1.
In the present embodiment, it is communicated with ice water tank 7 outside condensing tower 4 and freezing tower 5, is arranged between ice water tank 7 and condensing tower 4
There is water pump 8, compression refigerating machine 9 is provided between ice water tank 7 and freezing tower 5.It freezes and is arranged at the gas access below 5 inner cavity of tower
There is second gas distributor 501, coil pipe 502, coil pipe 502 and ice water tank 7 and compression refigerating machine are provided with above 5 inner cavity of freezing tower
9 are connected.
Specifically, it congeals and is provided with cooling tubulation in tower 4 to transmit chilled water, chilled water is cooling medium, and chilled water is
Freezed by compression refigerating machine 9 and obtained, free gas after congealing in tower 4 chilled water heat exchange, what solvent contained therein will become
Seldom, then free gas is further continued for flow direction freezing tower 5.
Free gas, to the 5 top flowing of freezing tower, is equipped with due to freezing inside tower 5 after second gas distributor 501
Coil pipe 502, the interior refrigerant using the compression of compressed refrigeration machine 9 of pipe of coil pipe 502, these refrigerants can freeze and flow through coil pipe
The free gas of 502 tube sides, at this moment if also containing solvent in free gas, these solvents, which will condense, is adhered to coil pipe 502
On outer wall, then drips to export through condensate drain 6 and collect.
In the present embodiment, to further facilitate the input and output of the cooling water in condenser 1 as cooling medium, facilitate cold
But the cycle of water, it is preferable that 1 lower section of condenser is provided with cooling water ingress pipe 102, and 1 top of condenser is provided with cooling water and leads
Outlet pipe 103.
In the present embodiment, to ensure that the air pressure in compensator 2 may remain in preset pressure, it is preferable that 2 top of compensator
It is provided with the first gas-guide tube 201 communicated with outside, first check-valve 202 is provided in the first gas-guide tube 201.
In the present embodiment, freezing tower 5 top be provided with external the second gas-guide tube 503 communicated, in the second gas-guide tube 503
It is provided with second check-valve 504.
Specifically, if according to normal condensing recovery flow, contained solvent itself in free gas in arrival freezing tower 5
Extremely pettiness, and recovery system pressure reaches tiny structure, the condensate drain 6 that solvent vapour has all been arranged through each tower body bottom
Export, the second check-valve 504 mounted on 5 top of freezing tower are closed.
But once unusual condition occurs in condensing recovery flow, internal system will generate positive pressure once in a while, at this point, second
Check-valves 504 opens release, and to make whole system pressure balance, then gradually condensation, freezing form tiny structure again.
A kind of solvent recovery unit provided by the present invention is described in detail above.It is used herein specifically a
Principle and implementation of the present invention are described for example, and the explanation of above example is only intended to help to understand the present invention's
Method and its core concept.It should be pointed out that for those skilled in the art, not departing from the principle of the invention
Under the premise of, it can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the claims in the present invention
Protection domain in.
Claims (7)
1. a kind of solvent recovery unit, which is characterized in that including condenser, compensator, absorption tower, condensing tower, tower is freezed,
In：
The air inlet pipe inputted for solvent vapour to be recycled is provided with above the condenser, the condenser is used for solvent vapour
Condensation；
It is connected below the compensator and the condenser, the compensator is used for the residual solvent after condenser condensation
The balance and stability of steam is to form it into free gas；
It is connected with the compensator below the absorption tower, the absorption tower is used for the absorption of solvent in free gas；
It is connected with absorption tower top above the condensing tower, the condensing tower is used for after the absorption tower lyosoption
The first condensation of free gas；
It is connected with condensing tower lower section below the freezing tower, the freezing tower is used for after the absorption tower lyosoption
The condensation again of free gas；
The condenser, the compensator, the absorption tower, the condensing tower, the freezing tower bottom are both provided with for cold
Condensate drain derived from solvent after solidifying.
2. solvent recovery unit according to claim 1, which is characterized in that be provided with cooling water below the condenser and lead
Enter pipe, cooling water delivery line is provided with above the condenser.
3. solvent recovery unit according to claim 1, which is characterized in that be provided at the top of the compensator and external phase
The first logical gas-guide tube is provided with first check-valve in first gas-guide tube.
4. solvent recovery unit according to claim 1, which is characterized in that the gas access below the absorption tower inner cavity
Place is provided with first gas distributor, and stainless steel cloth packing layer and cooling water distributor are provided with above the absorption tower inner cavity
And the cooling water distributor is located above the stainless steel cloth packing layer.
5. solvent recovery unit according to claim 1, which is characterized in that connect outside the condensing tower and the freezing tower
It is connected with ice water tank, water pump is provided between the ice water tank and the condensing tower, is set between the ice water tank and the freezing tower
It is equipped with compression refigerating machine.
6. solvent recovery unit according to claim 5, which is characterized in that the gas access below the freezing tower inner cavity
Place is provided with second gas distributor, and coil pipe, the coil pipe and the ice water tank and institute are provided with above the freezing tower inner cavity
Compression refigerating machine is stated to be connected.
7. solvent recovery unit according to claim 1, which is characterized in that the freezing top of tower is provided with and external phase
The second logical gas-guide tube is provided with second check-valve in second gas-guide tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810404748.6A CN108384636A (en) | 2018-04-28 | 2018-04-28 | A kind of solvent recovery unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810404748.6A CN108384636A (en) | 2018-04-28 | 2018-04-28 | A kind of solvent recovery unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108384636A true CN108384636A (en) | 2018-08-10 |
Family
ID=63066352
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810404748.6A Pending CN108384636A (en) | 2018-04-28 | 2018-04-28 | A kind of solvent recovery unit |
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| CN (1) | CN108384636A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200948368Y (en) * | 2006-05-17 | 2007-09-19 | 殷卫兵 | Mircro-negative-pressure type and freezing type packing tower tail gas recovery device |
| CN201470141U (en) * | 2009-08-18 | 2010-05-19 | 山东国信实业有限公司 | Tail gas recovery device |
| CN201695016U (en) * | 2010-05-12 | 2011-01-05 | 黄山市徽山食用油业有限公司 | Tea seed oil leaching system in oil tea seed cake |
| CN101992004A (en) * | 2009-08-26 | 2011-03-30 | 谷神生物科技集团有限公司 | N-hexane tail gas recovering device |
| CN208308808U (en) * | 2018-04-28 | 2019-01-01 | 湖南淳湘农林科技有限公司 | A kind of solvent recovery unit |
-
2018
- 2018-04-28 CN CN201810404748.6A patent/CN108384636A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200948368Y (en) * | 2006-05-17 | 2007-09-19 | 殷卫兵 | Mircro-negative-pressure type and freezing type packing tower tail gas recovery device |
| CN201470141U (en) * | 2009-08-18 | 2010-05-19 | 山东国信实业有限公司 | Tail gas recovery device |
| CN101992004A (en) * | 2009-08-26 | 2011-03-30 | 谷神生物科技集团有限公司 | N-hexane tail gas recovering device |
| CN201695016U (en) * | 2010-05-12 | 2011-01-05 | 黄山市徽山食用油业有限公司 | Tea seed oil leaching system in oil tea seed cake |
| CN208308808U (en) * | 2018-04-28 | 2019-01-01 | 湖南淳湘农林科技有限公司 | A kind of solvent recovery unit |
Non-Patent Citations (1)
| Title |
|---|
| 魏振华等: "《中小植物油厂实用技术》", 中国轻工业出版社, pages: 125 - 126 * |
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