CN216738224U - Solvent refining system in process of preparing base oil from waste lubricating oil - Google Patents
Solvent refining system in process of preparing base oil from waste lubricating oil Download PDFInfo
- Publication number
- CN216738224U CN216738224U CN202220505769.9U CN202220505769U CN216738224U CN 216738224 U CN216738224 U CN 216738224U CN 202220505769 U CN202220505769 U CN 202220505769U CN 216738224 U CN216738224 U CN 216738224U
- Authority
- CN
- China
- Prior art keywords
- tower
- solvent
- extraction
- extract
- extraction tower
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Extraction Or Liquid Replacement (AREA)
Abstract
The utility model relates to a solvent refining system in a process for preparing base oil from waste lubricating oil, belonging to the technical field of base oil regeneration processing. A solvent refining system in a process of preparing base oil from waste lubricating oil comprises an extraction tower group and is characterized in that the extraction tower group comprises an extraction tower A and an extraction tower B, a solvent inlet pipe is connected to the top side wall of the extraction tower B, the bottom of the extraction tower B is connected to the top side wall of the extraction tower A through a pipeline, an oil inlet pipe is connected to the bottom side wall of the extraction tower A, an oil outlet pipe at the top of the extraction tower A is connected to a connecting pipe at the bottom side wall of the extraction tower B, and an oil outlet pipe is arranged at the top of the extraction tower B; the bottom drain pipe access evaporation tower of extraction tower A, the top of the tower drain pipe access solvent drying tower of evaporation tower, the lateral wall sets up the solvent back flow at the bottom of the tower of solvent drying tower, and the solvent admission pipe of solvent back flow access extraction tower B top of the tower lateral wall, install solvent reflux pump on the pipeline of solvent back flow.
Description
Technical Field
The utility model relates to a solvent refining system in a process for preparing base oil from waste lubricating oil, belonging to the technical field of base oil regeneration processing.
Background
When the waste lubricating oil is used for processing and producing the base oil, the extractant is required to be used, and the extractant can be repeatedly used after being purified, so that the energy conservation and the consumption reduction of resources can be realized, the processing cost of products can be favorably reduced, and the pollution to the environment can be reduced. However, in the existing production system, no effective scheme is available for improving the recycling of the extracting agent and directly using the extracting agent in the production system.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the solvent refining system in the process of preparing the base oil from the waste lubricating oil is provided.
The utility model solves the technical problems through the following technical scheme:
a solvent refining system in a process of preparing base oil from waste lubricating oil comprises an extraction tower group and is characterized in that the extraction tower group comprises an extraction tower A and an extraction tower B, a solvent inlet pipe is connected to the top side wall of the extraction tower B, the bottom of the extraction tower B is connected to the top side wall of the extraction tower A through a pipeline, an oil inlet pipe is connected to the bottom side wall of the extraction tower A through the bottom side wall of the extraction tower A, an oil outlet pipe at the top of the extraction tower A is connected to a connecting pipe at the bottom side wall of the extraction tower B, and an oil outlet pipe is arranged at the top of the extraction tower B; the bottom drain pipe at the bottom of the tower of extraction tower A inserts the evaporating tower, and the top drain pipe of evaporating tower inserts solvent drying tower, the lateral wall sets up the solvent back flow at the bottom of the tower of solvent drying tower, and the solvent admission pipe of solvent back flow access extraction tower B top of the tower lateral wall, install solvent reflux pump on the pipeline of solvent back flow.
The technical scheme has the advantages that: crude oil from distillation is pumped into the lower part of an extraction tower A by a raw material pump, refined liquid at the top of the extraction tower A enters the lower part of an extraction tower B under self pressure, extract at the bottom of the extraction tower A enters a flash tower under self pressure and then enters a solvent drying tower, rich solvent at the bottom of the solvent drying tower is pumped into the upper part of the extraction tower B by a tower bottom pump, and refined liquid at the top of the extraction tower B enters a refined liquid system under self pressure; the crude oil is in countercurrent contact with a solvent and mixed in two extraction towers, two phases with different specific gravities are separated at the temperature lower than the critical temperature of an oil product, and then non-ideal components flow out from the bottom of the tower to be extract liquid by utilizing the specific gravity difference, ideal components flow out from the top of the tower to be refined liquid; extracting the extract through a flash tower and a solvent drying tower to extract the solvent, and reusing the solvent; the structure realizes the recycling of the solvent and embodies the purposes of energy conservation and consumption reduction.
On the basis of the technical scheme, the application makes the following improvements and improvements on the technical scheme:
further, the evaporation tower comprises an extract primary evaporation tower and an extract secondary evaporation tower, a tower bottom liquid outlet pipe of the extraction tower A is connected to the extract primary evaporation tower, a heat exchanger B and a heating furnace convection chamber are arranged in the liquid inlet direction of the front edge of the extract primary evaporation tower, the tower bottom liquid outlet pipe of the extract primary evaporation tower is connected with a liquid inlet pipe of the heating furnace, a liquid outlet pipe of the heating furnace is connected to the extract secondary evaporation tower, and the tower bottom liquid outlet pipe of the extract secondary evaporation tower is connected to the extract flash evaporation tower; the top of the extract flash tower is connected with a vacuum tank through a pipeline, and the extract flash tower is communicated with a product tank through a pump.
The technical characteristics have the beneficial effects in the application that: the temperature of the extract is improved by arranging the heat exchanger B and the heating furnace convection chamber, so that subsequent treatment is facilitated, the flash tower is divided into an extract primary evaporation tower and an extract secondary evaporation tower, and the extract primary evaporation tower and the extract secondary evaporation tower are connected in series through the heating furnace, so that the solvent can be more effectively purified.
Further, a heat exchanger and a cooler are sequentially arranged on pipelines of the tower tops of the extract primary evaporation tower and the extract secondary evaporation tower, which are connected to the solvent drying tower; and a group of heat exchangers and coolers connected in parallel are arranged between the extract secondary evaporation tower and the solvent drying tower.
The technical characteristics have the beneficial effects in the application that: used for adjusting the temperature of the solvent entering the solvent drying tower.
Further, a solvent reflux system which is bypassed is arranged on a solvent reflux pipe from the solvent reflux pump to the extraction tower B, and the reflux system comprises a tower A, a reboiler, a reflux tank and a heat exchanger A; the refluxed solvent is connected into a tower A through a heat exchanger A, the top of the tower A is connected into the top of a reflux tank through a pipeline, the bottom of the reflux tank is connected into the side wall of the top of the tower A through a pump, the bottom of the tower A is connected with the heat exchanger A through a pump, and the heat exchanger A is connected into a solvent drying tower through a pipeline; and a liquid inlet pipe of the reboiler is communicated with a pipeline from the bottom of the tower A to the heat exchanger A, and a liquid outlet pipe of the reboiler is connected with a liquid inlet pipe on the side wall of the bottom of the tower A.
The technical characteristics have the beneficial effects in the application that: the solvent in the reflux pipeline is timely adjusted to reflux to the solvent drying tower through detection of the solvent in the reflux pipeline, so that the content of water in the solvent is further reduced.
Furthermore, a cooler is arranged on a pipeline connected to the top of the tower A into the reflux tank, and the top of the reflux tank is connected with a vacuumizing device.
The technical characteristics have the beneficial effects in the application that: for adjusting the temperature of the solvent in the pipe.
Furthermore, a cooler H is arranged on a pipeline from the extract flash tower to the vacuum tank.
The technical characteristics have the beneficial effects in the application that: the device is used for heating the temperature of the solvent in the pipeline so as to ensure the realization of heat exchange in the heat exchanger A.
Drawings
FIG. 1 is a schematic diagram of a system configuration of a solvent refining system in a process for preparing base oil from waste lubricating oil according to the present application.
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is an enlarged view of FIG. 1 at B;
fig. 4 is an enlarged view of fig. 1 at C.
The reference numbers are recorded as follows: the method comprises the following steps of (1) an evaporation tower-1, an extract primary evaporation tower-1.1, an extract secondary evaporation tower-1.2, a heating furnace-2, a solvent drying tower-3, a vacuum tank-4, an extract flash tower-5, a solvent dehydrating tower-6, a reboiler-7, a reflux tank-8, a heating furnace convection chamber-9, an extraction tower B-10 and an extraction tower A-11; heat exchanger B-12, heat exchanger A-13, cooler H-14, reflux pump-15.
Detailed Description
The following examples are only for illustrating the technical solutions described in the claims with reference to the drawings, and are not intended to limit the scope of the claims.
With reference to fig. 1-4, a solvent refining system in a process of preparing base oil from waste lubricating oil comprises an extraction tower group, wherein the extraction tower group comprises an extraction tower a11 and an extraction tower B10, a solvent inlet pipe is connected to the top side wall of an extraction tower B10, the bottom of the extraction tower B10 is connected to the top side wall of an extraction tower a11 through a pipeline, an oil inlet pipe is connected to the bottom side wall of an extraction tower a11, an oil outlet pipe at the top of the extraction tower a11 is connected to an access pipe at the bottom side wall of an extraction tower B10, and an oil outlet pipe is arranged at the top of the extraction tower B10; the bottom drain pipe of the tower bottom of extraction tower A11 inserts evaporation tower 1, and the top drain pipe of evaporation tower 1 inserts solvent drying tower 3, the lateral wall sets up the solvent back flow at the bottom of the tower of solvent drying tower 3, and the solvent admission pipe of solvent back flow access extraction tower B10 top of the tower lateral wall, installation solvent reflux pump 15 on the pipeline of solvent back flow.
On the basis of the technical scheme, the application makes the following improvements and improvements on the technical scheme:
the evaporation tower 1 comprises an extract primary evaporation tower 1.1 and an extract secondary evaporation tower 1.2, a tower bottom liquid outlet pipe of the extraction tower A11 is connected to the extract primary evaporation tower 1.1, a heat exchanger B12 and a heating furnace convection chamber 9 are arranged in the liquid inlet direction of the front edge of the extract primary evaporation tower 1.1, the tower bottom liquid outlet pipe of the extract primary evaporation tower 1.1 is connected with a liquid inlet pipe of the heating furnace 2, the liquid outlet pipe of the heating furnace 2 is connected to the extract secondary evaporation tower 1.2, and the tower bottom liquid outlet pipe of the extract secondary evaporation tower 1.2 is connected to the extract flash tower 5; the top of the extract flash tower 5 is connected with the vacuum tank 4 through a pipeline, and the extract flash tower 5 is communicated with the product tank through a pump;
the heat exchanger and the cooler are sequentially arranged on the pipelines of the solvent drying tower 3 connected to the tops of the extract primary evaporation tower 1.1 and the extract secondary evaporation tower 1.2; a group of heat exchangers and coolers connected in parallel are arranged between the extract secondary evaporation tower 1.2 and the solvent drying tower 3;
a solvent reflux system which is bypassed is arranged on a solvent reflux pipe from the solvent reflux pump 15 to the extraction tower B10, and the reflux system comprises a solvent dehydration tower 6, a reboiler 7, a reflux tank 8 and a heat exchanger A13; the refluxed solvent is connected into a solvent dehydration tower 6 through a heat exchanger A13, the top of the solvent dehydration tower 6 is connected into the top of a reflux tank 8 through a pipeline, the bottom of the reflux tank 8 is connected into the side wall of the top of the solvent dehydration tower 6 through a pump, an external drainage pipe is further arranged on the pipeline and used for draining excessive water during the process of dehydrating fruits, the bottom of the solvent dehydration tower 6 is connected with a heat exchanger A13 through a pump, and the heat exchanger A13 is connected into a solvent drying tower 3 through a pipeline; a liquid inlet pipe of the reboiler 7 is communicated with a pipeline from the bottom of the solvent dehydration tower 6 to the heat exchanger A13, and a liquid outlet pipe of the reboiler 7 is connected to the liquid inlet pipe on the side wall of the bottom of the solvent dehydration tower 6;
a cooler H14 is arranged on a pipeline connected to the reflux tank 8 at the top of the solvent dehydration tower 6, and the top of the reflux tank 8 is connected with a vacuum-pumping device;
and a cooler is arranged on a pipeline from the extract flash tower 5 to the vacuum tank 4.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A solvent refining system in a process of preparing base oil from waste lubricating oil comprises an extraction tower group and is characterized in that the extraction tower group comprises an extraction tower A (11) and an extraction tower B (10), a solvent inlet pipe is connected to the top side wall of the extraction tower B (10), the bottom of the extraction tower B (10) is connected to the top side wall of the extraction tower A (11) through a pipeline, an oil inlet pipe is connected to the bottom side wall of the extraction tower A (11), an oil outlet pipe at the top of the extraction tower A (11) is connected to an access pipe at the bottom side wall of the extraction tower B (10), and an oil outlet pipe is arranged at the top of the extraction tower B (10); the bottom drain pipe in the bottom of the tower of extraction column A (11) inserts evaporating tower (1), and the top drain pipe of evaporating tower (1) inserts solvent drying tower (3), the lateral wall sets up the solvent back flow at the bottom of the tower of solvent drying tower (3), and the solvent admission pipe of solvent back flow access extraction column B (10) top of the tower lateral wall, install solvent reflux pump (15) on the pipeline of solvent back flow.
2. The solvent refining system in the process for preparing base oil from waste lubricating oil according to claim 1, wherein the evaporation tower (1) comprises a primary extract evaporation tower (1.1) and a secondary extract evaporation tower (1.2), a liquid outlet pipe at the bottom of the extraction tower A (11) is connected into the primary extract evaporation tower (1.1), a heat exchanger B (12) and a heating furnace convection chamber (9) are arranged in the liquid inlet direction of the front edge of the primary extract evaporation tower (1.1), a liquid outlet pipe at the bottom of the primary extract evaporation tower (1.1) is connected with a liquid inlet pipe of the heating furnace (2), a liquid outlet pipe of the heating furnace (2) is connected into the secondary extract evaporation tower (1.2), and a liquid outlet pipe at the bottom of the secondary extract evaporation tower (1.2) is connected into the extract flash evaporation tower (5); the top of the extract flash tower (5) is connected with the vacuum tank (4) through a pipeline, and the extract flash tower (5) is communicated with the product tank through a pump.
3. The solvent refining system in the process of preparing base oil from waste lubricating oil according to claim 2, characterized in that a heat exchanger and a cooler are arranged on the pipeline of the top access solvent drying tower (3) of the extract primary evaporation tower (1.1) and the extract secondary evaporation tower (1.2) in sequence; and a group of heat exchangers and coolers connected in parallel are arranged between the extract secondary evaporation tower (1.2) and the solvent drying tower (3).
4. The solvent refining system in the process for preparing base oil from waste lubricating oil according to claim 3, characterized in that the solvent reflux pump (15) is provided with a by-pass reflux system on the solvent reflux pipe of the extraction tower B (10), and the reflux system comprises a solvent dehydration tower (6), a reboiler (7), a reflux tank (8) and a heat exchanger A (13); the refluxed solvent is connected into a solvent dehydration tower (6) through a heat exchanger A (13), the top of the solvent dehydration tower (6) is connected into the top of a reflux tank (8) through a pipeline, the bottom of the reflux tank (8) is connected into the side wall of the top of the solvent dehydration tower (6) through a pump, the bottom of the solvent dehydration tower (6) is connected with the heat exchanger A (13) through a pump, and the heat exchanger A (13) is connected into a solvent drying tower (3) through a pipeline; and a liquid inlet pipe of the reboiler (7) is communicated with a pipeline from the bottom of the solvent dehydration tower (6) to the heat exchanger A (13), and a liquid outlet pipe of the reboiler (7) is connected to a liquid inlet pipe on the side wall of the bottom of the solvent dehydration tower (6).
5. The solvent refining system in the process of preparing the base oil from the waste lubricating oil according to claim 4, wherein a cooler H (14) is arranged on a pipeline which is connected to the top of the solvent dehydrating tower (6) and is connected to the return tank (8), and the top of the return tank (8) is connected with a vacuumizing device.
6. The solvent refining system in the process for preparing base oil from waste lubricating oil according to claim 5, characterized in that a cooler is arranged on the pipeline from the extract flash tower (5) to the vacuum tank (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220505769.9U CN216738224U (en) | 2022-03-10 | 2022-03-10 | Solvent refining system in process of preparing base oil from waste lubricating oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220505769.9U CN216738224U (en) | 2022-03-10 | 2022-03-10 | Solvent refining system in process of preparing base oil from waste lubricating oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216738224U true CN216738224U (en) | 2022-06-14 |
Family
ID=81921943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220505769.9U Active CN216738224U (en) | 2022-03-10 | 2022-03-10 | Solvent refining system in process of preparing base oil from waste lubricating oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216738224U (en) |
-
2022
- 2022-03-10 CN CN202220505769.9U patent/CN216738224U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203710716U (en) | Device for improving recycling rate of alcohol ketone components in refining process of cyclohexanone | |
| CN101544913A (en) | Process and equipment for negative pressure benzene removal | |
| CN1736527A (en) | Alcohol quinque-towel differential pressure distilling arrangement and technique thereof | |
| CN214327607U (en) | Tetrahydrofuran recycling and refining device | |
| CN103073145A (en) | System for recovering light oil from residual ammonia water | |
| CN101088975A (en) | Fuel alcohol dewatering apparatus and process | |
| CN102796571B (en) | System for producing light benzene by performing negative pressure debenzolization on rich oil | |
| CN102716596A (en) | Five-tower differential-pressure energy-saving alcohol distillation device | |
| CN102584524A (en) | Alcohol recovery tower | |
| CN205024120U (en) | Methanol recovery device | |
| CN216738224U (en) | Solvent refining system in process of preparing base oil from waste lubricating oil | |
| CN203833916U (en) | Esterification treatment system capable of effectively recycling methyl alcohol | |
| CN203677978U (en) | Vapor-compression type alcohol recovery tower | |
| CN202538386U (en) | Alcohol recovery tower | |
| CN111333480A (en) | Butadiene refining method and device | |
| CN212051249U (en) | Anhydrous steam stripping device for oil products | |
| CN201108755Y (en) | Dual-purpose concentrator set for dissolvent circulating extraction | |
| CN106479668B (en) | Device for extracting star anise oil by negative pressure circulating water | |
| CN203030013U (en) | Solvent recovery and water removal device for sucralose production | |
| CN203816258U (en) | Multistage distillation system for biodiesel | |
| CN210314061U (en) | Rectification and purification device for synthesizing dimethyl oxalate by carbonylation of coal-made ethylene glycol | |
| CN208250270U (en) | One kind using wine distillation equipment for red hayberry wine processing purification | |
| CN203425540U (en) | Filtrate concentration device used in pectin production | |
| CN102617627A (en) | Device and method for continuously separating silicon tetrachloride, propyl trichlorosilane and 3-chloropropyltrichlorosilane | |
| CN103588734A (en) | Recovery method and recovery device of butyl ester and acetone in ketene dimer production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |