CN107551582B - Organic solvent recovery system - Google Patents
Organic solvent recovery system Download PDFInfo
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- CN107551582B CN107551582B CN201711030440.1A CN201711030440A CN107551582B CN 107551582 B CN107551582 B CN 107551582B CN 201711030440 A CN201711030440 A CN 201711030440A CN 107551582 B CN107551582 B CN 107551582B
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Abstract
The invention discloses an organic solvent recovery system, which comprises an evaporation unit, a condensation unit and a collection unit which are connected in sequence, wherein the evaporation unit comprises a heating box and a conveying pipe; the condensing unit comprises a condensing box, a circulating cooling cylinder and a water pump, wherein a plurality of partition plates are arranged in the condensing box, and divide the condensing box into a plurality of chambers; each chamber is provided with a plurality of condensation pipes, and the diameters of the condensation pipes in the chambers from top to bottom are reduced; one end of the conveying pipe is communicated with the cavity, the partition plate is provided with a strip opening, and the cavity at the top of the condensing box is communicated with a discharging pipe; a drainage cavity is arranged in the clapboard, the condenser pipe is communicated with the drainage cavity, and a liquid separation cavity is arranged at the upper end of the condenser tank; the circulating cooling cylinder is provided with a liquid inlet pipe and a liquid outlet pipe, one end of the liquid outlet pipe is provided with a plurality of branch pipes, and the branch pipes are respectively communicated with the drainage cavity. Compared with the prior art, the system greatly improves the efficiency of recovering the mixture containing various organic solvents, and simultaneously recovers the organic solvents one by one and also improves the recovery effect of the organic solvents.
Description
Technical Field
The invention belongs to the technical field of organic solvent recovery, and particularly discloses an organic solvent recovery system.
Background
Organic solvents are a large group of organic compounds widely used in life and production, have small molecular weights, and are widely present in paints, adhesives, lacquers, and cleaners. Organic solvents can dissolve some compounds that are insoluble in water (e.g., greases, waxes, resins, rubbers, dyes, etc.), and thus organic solvents are commonly used in industrial processes. The organic solvent is generally in a liquid state at normal temperature and normal pressure, has higher volatility, and the properties of the solute and the solvent are not changed in the dissolving process, so the organic solvent can be separated again for recycling after being used.
The organic solvent can form a mixture with various impurities, solutes and the like after being used, and the mixture is heated to volatilize the organic solvent in the mixture; and then the volatilized organic solvent is condensed and collected, so that the organic solvent with higher purity can be obtained again, and the organic solvent can be conveniently reused. In actual industrial production, a plurality of organic solvents with different boiling points are usually used at the same time, and the current organic solvent recovery system is used for recovery processing, so that only the mixture of the organic solvents can be recovered, and the separated organic solvent mixture needs to be purified or separated to realize the recycling of the organic solvents; the operation of the organic solvent recovery process is complicated, the recovery efficiency is low, and the recovery effect is poor.
Disclosure of Invention
The invention aims to provide an organic solvent recovery system, which aims to solve the problem of low efficiency when a mixture containing a plurality of organic solvents is recovered by the conventional organic solvent recovery system.
In order to achieve the purpose, the basic scheme of the invention is as follows: the organic solvent recovery system comprises an evaporation unit, a condensation unit and a collection unit which are sequentially connected, wherein the evaporation unit comprises a heating box for heating a mixture and a conveying pipe communicated with the heating box; the condensation unit comprises a condensation box, a circulating cooling cylinder and a water pump, wherein a plurality of partition plates are arranged in the condensation box, and divide the condensation box into a plurality of chambers; each chamber is provided with a plurality of condenser pipes which correspond to each other in number and position and are communicated with each other, and the diameters of the condenser pipes in the chambers from top to bottom are reduced; one end of the conveying pipe, which is far away from the heating box, is communicated with a cavity at the bottom of the condensing box, a strip opening communicated with adjacent cavities is formed in the partition plate, and a discharging pipe is communicated with the cavity at the top of the condensing box; a drainage cavity is arranged in the partition plate, the condensing pipe is communicated with the drainage cavity, and a liquid distribution cavity communicated with the condensing pipe close to the top of the condensing box is arranged at the upper end of the condensing box; a liquid inlet pipe and a liquid outlet pipe are arranged on the circulating cooling cylinder, the liquid inlet pipe is communicated with the liquid separating cavity, the water pump is arranged on the liquid inlet pipe, one end of the liquid outlet pipe, which is far away from the circulating cooling cylinder, is provided with a plurality of branch pipes, and the branch pipes are respectively communicated with the discharge cavity; the collecting unit comprises collecting boxes corresponding to the number of the cavities, collecting pipes are arranged on the collecting boxes, and the collecting boxes are connected with the cavities through the collecting pipes.
The working principle of the basic scheme is as follows: the mixture containing a plurality of organic solvents can be recovered by the system, and the system mainly utilizes the different boiling points of the plurality of organic solvents to recover respectively. The system is used for recovering the organic solvent, the mixture containing a plurality of organic solvents is introduced into the heating box of the evaporation unit for heating, the organic solvent contained in the heated mixture is volatilized into a gaseous state, and the gaseous state is introduced into the chamber of the condensation unit through the conveying pipe.
The cooling liquid is added into the circulating cooling cylinder for cooling treatment, the water pump is started to pump the cooling liquid into the liquid separating cavity through the liquid inlet pipe, and the cooling liquid in the liquid separating cavity flows into the condensing pipe of the top cavity. The cooling liquid flows downwards along the condensation pipe under the action of gravity, and part of the cooling liquid flows into the drainage cavity due to the fact that the diameter of the condensation pipe in the cavity from top to bottom is reduced. Because the drainage cavity is communicated with the liquid outlet pipe through the branch pipe, part of the cooling liquid flows back to the circulating cooling cylinder through the branch pipe and the liquid outlet pipe after flowing into the drainage cavity. In this process, each chamber has a temperature at which the gaseous organic solvent condenses under the action of the condensate.
Since the end of the transfer pipe remote from the heating tank communicates with the chamber located at the bottom of the condensing tank, the gaseous organic solvent is fed into the chamber located at the lowermost portion. Because the diameter of the condensation pipe in the cavity from top to bottom is reduced, the passing condensation liquid in the cavity from top to bottom is reduced, and the temperature in the cavity from top to bottom is sequentially increased. In the bottommost chamber, the organic solvent with a relatively high boiling point will condense, and in the case where the organic solvent is continuously introduced into the chamber, the organic solvent with a relatively low boiling point will be sequentially transferred to the upper chambers along the openings of the partition plates. In the process that the organic solvent sequentially enters the chambers with gradually reduced temperature, the organic solvent with the boiling point from high to low is condensed in the chambers which sequentially go upwards; the organic solvents are respectively condensed according to the boiling points of the organic solvents, so that the system can rapidly condense and separate the organic solvents in various organic solvent mixtures after being sequentially treated.
The collecting boxes correspond to the cavities in number and are provided with collecting pipes, and the collecting boxes are connected with the cavities through the collecting pipes; the organic solvent condensed and separated from each chamber is collected into a collecting box through a collecting pipe, and the organic solvent collected in the collecting box has high purity and can be directly recycled. The cavity at the top of the condensing box is communicated with a discharge pipe, and gaseous substances which cannot be condensed discharge the discharge pipe out of the condensing box. The system realizes the separation of multiple organic solvents through one-time operation, and has the advantages of simple operation of the recovery process of the organic solvents and effective improvement of the recovery efficiency and recovery effect of the organic solvents.
Compared with the prior art, the system greatly improves the efficiency of recovering the mixture containing various organic solvents, and simultaneously recovers the organic solvents one by one and also improves the recovery effect of the organic solvents.
The first preferred scheme is as follows: preferably, the longitudinal section of the partition board is in the shape of an upwardly convex arc, and the strip opening is positioned at the top of the partition board. The organic solvent which is convenient for condensation easily flows downwards along the partition plate, and the setting of the opening position can prevent the condensed organic solvent from flowing to the next chamber along the opening.
The preferred scheme II is as follows: preferably, as a first preferred scheme, the number of the branch pipes is twice that of the bleed cavities, and the two ends of the bleed cavities are connected with the branch pipes. Because the longitudinal section of the partition plate is in the shape of an upward convex arc, the positions of two ends of the partition plate are lower, and the two branch pipes are convenient for collecting condensate from two sides of the drainage cavity.
The preferable scheme is three: preferably, two collecting pipes are arranged on the same collecting box, the two collecting pipes are respectively connected to two sides of the same chamber, and the collecting pipes are located at the lower end of the partition plate. Because the longitudinal section of the partition plate is in the shape of an upward convex arc, the two ends of the partition plate are lower, and the two collecting pipes are convenient for collecting condensed organic solvent from the two sides of the chamber.
The preferable scheme is four: as the optimization of basic scheme, discharging pipe detachable connects at the top of condensing tank, is equipped with the filter layer in the discharging pipe. The non-condensable gaseous substances can discharge the discharge pipe out of the condensation box, and the filter layer is used for treating part of the gaseous substances, so that the environmental pollution caused by direct discharge is avoided; the discharging pipe is detachably arranged, so that the condensing box is convenient to clean.
Drawings
FIG. 1 is a schematic structural view of an embodiment of the organic solvent recovery system of the present invention;
fig. 2 is a sectional view of the condensing unit.
Detailed Description
The present invention will be described in further detail below by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a heating box 10, a conveying pipe 11, a condensing box 20, a liquid separating cavity 21, a cavity 22, a condensing pipe 23, a partition plate 30, a drainage cavity 31, a strip port 32, a discharge pipe 40, a filter layer 41, a circulating cooling cylinder 50, a liquid inlet pipe 51, a water pump 52, a liquid outlet pipe 53, a branch pipe 54, a collecting box 60 and a collecting pipe 61.
As shown in fig. 1 and 2, the organic solvent recovery system comprises an evaporation unit, a condensation unit and a collection unit which are connected in sequence, wherein the evaporation unit comprises a heating box 10 for heating a mixture, and a conveying pipe 11 communicated with the heating box 10; the condensing unit comprises a condensing box 20, a circulating cooling cylinder 50 and a water pump 52, wherein a plurality of partition plates 30 are arranged in the condensing box 20, the longitudinal sections of the partition plates 30 are arc-shaped protruding upwards, in the embodiment, five partition plates 30 are selected, and the condensing box 20 is divided into five chambers 22 by the five partition plates 30. Each chamber 22 is provided with a plurality of condenser pipes 23 which correspond to each other in number and position and are communicated with each other, and the diameters of the condenser pipes 23 in the chambers 22 from top to bottom are reduced; one end that heating cabinet 10 was kept away from to conveyer pipe 11 communicates with the cavity 22 that is located the condensing box 20 bottom, has set up the strip mouth 32 that communicates adjacent cavity 22 on the baffle 30, and strip mouth 32 is located the top of baffle 30, and the cavity 22 intercommunication at condensing box 20 top has discharging pipe 40, and discharging pipe 40 detachable connects at the top of condensing box 20, is equipped with filter layer 41 in the discharging pipe 40. A drainage cavity 31 is arranged in the clapboard 30, the condenser pipe 23 is communicated with the drainage cavity 31, and the upper end of the condenser box 20 is provided with a liquid separation cavity 21 communicated with the condenser pipe 23 close to the top of the condenser box 20; a liquid inlet pipe 51 and a liquid outlet pipe 53 are arranged on the circulating cooling cylinder 50, the liquid inlet pipe 51 is communicated with the liquid distribution cavity 21, a water pump 52 is arranged on the liquid inlet pipe 51, one end of the liquid outlet pipe 53, which is far away from the circulating cooling cylinder 50, is provided with ten branch pipes 54 of the drainage cavity 31, and no two branch pipes 54 are respectively communicated with the connecting end of the same drainage cavity 31; the collecting unit comprises five collecting boxes 60, two collecting pipes 61 are arranged on the same collecting box 60, the two collecting pipes 61 are respectively connected to two sides of the same chamber 22, and the collecting pipe 61 is positioned at the lower end of the partition plate 30.
The mixture containing a plurality of organic solvents can be recovered by the system, and the system mainly utilizes the different boiling points of the plurality of organic solvents to recover respectively. When the system is used for recovering the organic solvent, a mixture containing a plurality of organic solvents is introduced into the heating box 10 of the evaporation unit for heating, the organic solvents contained in the heating mixture will be volatilized into a gaseous state, and the gaseous state is introduced into the chamber 22 of the condensation unit through the conveying pipe 11.
Cooling liquid is added into the circulating cooling cylinder 50 for cooling treatment, the water pump 52 is started to pump the cooling liquid into the liquid separating cavity 21 through the liquid inlet pipe 51, and the cooling liquid in the liquid separating cavity 21 flows into the condensing pipe 23 of the top chamber 22. The coolant will flow down the condenser tube 23 under the action of gravity, and part of the coolant will flow into the drain chamber 31 due to the reduced diameter of the condenser tube 23 in the chamber 22 from top to bottom. Because the drainage cavity 31 is communicated with the liquid outlet pipe 53 through the branch pipe 54, part of the cooling liquid flows back to the circulating cooling cylinder 50 through the branch pipe 54 and the liquid outlet pipe 53 after flowing into the drainage cavity 31. In the process, each chamber 22 has a temperature at which the gaseous organic solvent condenses, under the action of the condensate.
Since the end of the duct 11 remote from the heating cabinet 10 communicates with the chamber 22 at the bottom of the condensation cabinet 20, the gaseous organic solvent is fed into the chamber 22 at the lowermost portion. Due to the reduced diameter of the condensation duct 23 in the top-to-bottom chamber 22, the passing of the condensation in the top-to-bottom chamber 22 is reduced, and the temperature in the top-to-bottom chamber 22 is increased in sequence. In the bottommost chamber 22, the organic solvent with a relatively high boiling point will condense, and in the case where the organic solvent continues to be introduced into the chamber 22, the organic solvent with a relatively low boiling point will be sequentially transferred to the upper chamber 22 along the opening of the partition plate 30. During the process that the organic solvent sequentially enters the chambers 22 with gradually-reduced temperature, the organic solvent with the boiling point from high to low will be condensed in the chambers 22 sequentially upward; the organic solvents are respectively condensed according to the boiling points of the organic solvents, so that the system can rapidly condense and separate the organic solvents in various organic solvent mixtures after being sequentially treated.
Because the collecting box 60 corresponds to the number of the cavities 22, the collecting box 60 is provided with a collecting pipe 61, and the collecting box 60 is connected with the cavities 22 through the collecting pipe 61; the organic solvent condensed and separated in each chamber 22 will be collected by the collecting pipe 61 and collected in the collecting tank 60, and the organic solvent collected in the collecting tank 60 has high purity and can be recycled directly. The chamber 22 at the top of the condensation chamber 20 is connected to an outlet pipe 40, and the non-condensable gaseous substances will leave the outlet pipe 40 out of the condensation chamber 20. The system realizes the separation of multiple organic solvents through one-time operation, and has the advantages of simple operation of the recovery process of the organic solvents and effective improvement of the recovery efficiency and recovery effect of the organic solvents.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.
Claims (5)
1. The organic solvent recovery system is characterized by comprising an evaporation unit, a condensation unit and a collection unit which are sequentially connected, wherein the evaporation unit comprises a heating box for heating a mixture and a conveying pipe communicated with the heating box; the condensation unit comprises a condensation box, a circulating cooling cylinder and a water pump, wherein a plurality of partition plates are arranged in the condensation box, and divide the condensation box into a plurality of chambers; each chamber is provided with a plurality of condenser pipes which correspond to each other in number and position and are communicated with each other, and the diameters of the condenser pipes in the chambers from top to bottom are reduced; one end of the conveying pipe, which is far away from the heating box, is communicated with a cavity at the bottom of the condensing box, a strip opening communicated with adjacent cavities is formed in the partition plate, and a discharging pipe is communicated with the cavity at the top of the condensing box; a drainage cavity is arranged in the partition plate, the condensing pipe is communicated with the drainage cavity, and a liquid distribution cavity communicated with the condensing pipe close to the top of the condensing box is arranged at the upper end of the condensing box; a liquid inlet pipe and a liquid outlet pipe are arranged on the circulating cooling cylinder, the liquid inlet pipe is communicated with the liquid separating cavity, the water pump is arranged on the liquid inlet pipe, one end of the liquid outlet pipe, which is far away from the circulating cooling cylinder, is provided with a plurality of branch pipes, and the branch pipes are respectively communicated with the discharge cavity; the collecting unit comprises collecting boxes corresponding to the number of the cavities, collecting pipes are arranged on the collecting boxes, and the collecting boxes are connected with the cavities through the collecting pipes.
2. The organic solvent recovery system of claim 1, wherein the partition has a longitudinal section in the shape of an upwardly convex circular arc, and the slit is located at the top of the partition.
3. The organic solvent recovery system of claim 2, wherein the number of the branch pipes is twice the number of the drain chambers, and the branch pipes are connected to both ends of the drain chambers.
4. The organic solvent recovery system of claim 2, wherein two collecting pipes are provided on the same collecting tank, the two collecting pipes are connected to both sides of the same chamber, and the collecting pipe is located at the lower end of the partition plate.
5. The organic solvent recovery system of claim 1, wherein the outlet pipe is removably connected to the top of the condenser tank, and a filter layer is disposed in the outlet pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711030440.1A CN107551582B (en) | 2017-10-30 | 2017-10-30 | Organic solvent recovery system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711030440.1A CN107551582B (en) | 2017-10-30 | 2017-10-30 | Organic solvent recovery system |
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| CN107551582A CN107551582A (en) | 2018-01-09 |
| CN107551582B true CN107551582B (en) | 2020-10-30 |
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| CN109612292A (en) * | 2019-01-15 | 2019-04-12 | 海安艾拉新材料有限公司 | Condensing plant is used in a kind of processing of new material |
| CN114768289B (en) * | 2022-04-25 | 2024-01-19 | 滕州市天水生物科技有限公司 | Petroleum ether solvent recycling equipment in essence production |
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| CN103335534A (en) * | 2013-06-09 | 2013-10-02 | 南通久信石墨科技开发有限公司 | Multi-layer efficient distilling condensation separating tower and mixed gas separating method thereof |
| CN103923669B (en) * | 2014-04-02 | 2015-10-28 | 上海交通大学 | The integral vacuum pyrolysis recovery device of liquid crystal and light polarizing film in waste and old liquid crystal panel |
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