CN216170101U - Separation and recovery system of methanol solution and alkane oil - Google Patents
Separation and recovery system of methanol solution and alkane oil Download PDFInfo
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- CN216170101U CN216170101U CN202122174267.0U CN202122174267U CN216170101U CN 216170101 U CN216170101 U CN 216170101U CN 202122174267 U CN202122174267 U CN 202122174267U CN 216170101 U CN216170101 U CN 216170101U
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Abstract
The utility model discloses a separation and recovery system of methanol solution and alkane oil, which comprises an extraction tank, an oil-water separator, a reflux tank and a collection tank, wherein a stock solution inlet of the extraction tank is connected with a methanol condensate main pipe, an extractant inlet of the extraction tank is connected with a desalted water main pipe, a liquid outlet of the extraction tank is connected with an inlet pipeline of a second flow valve, an outlet of the second flow valve is connected with an inlet pipeline of the reflux tank, an overflow port of the extraction tank is connected with an inlet pipeline of a third flow valve, an outlet of the third flow valve is connected with an inlet pipeline of the oil-water separator, an alkane outlet of the oil-water separator is connected with an inlet pipeline of the collection tank, and a water outlet of the oil-water separator is connected with an inlet pipeline of the reflux tank; the extraction tank is provided with an observation port, the axis of the observation port and the axis of the overflow port are positioned in the same horizontal plane, the observation port is connected with an inlet pipeline of the first stop valve, and the outlet of the first stop valve is connected with a flange viewing mirror flange through a connecting pipe.
Description
The technical field is as follows:
the utility model relates to the field of methanol production, in particular to a separation and recovery system of a methanol solution and alkane oil.
Background art:
crude methanol from the synthesis process is preheated and then fed to a pre-rectification column which serves to remove gases dissolved in the crude methanol, oxygenated organics having a boiling point lower than that of methanol, and small amounts of alkanes. The top of the methanol pre-rectifying tower is provided with a condenser, most of methanol contained in steam at the top of the tower is condensed in a first condenser, condensate enters an extraction tank, desalted water is added into the extraction tank to serve as an extracting agent, materials sequentially pass through a mixing zone, a separation zone and a collection zone in the extraction tank, the collection zone is provided with an overflow port, most of impurities originally dissolved in the condensate are changed in relative volatility through extraction, most of saturated hydrocarbon impurities are lifted to the upper part of a liquid surface along with the reduction of the concentration of the methanol, alkane insoluble in the methanol at the upper layer is periodically discharged through the overflow port, and the extracted condensate enters a reflux tank from a liquid outlet at the bottom of the extraction tank. The method can only remove most of alkane impurities, a small part of desalted water of the alkane impurities can form emulsion, and the interface of the alkane oil and the methanol solution can not be accurately controlled by adopting a layering method, so that the methanol solution can be brought to an alkane oil product or the alkane oil can be brought back to the tower to be removed again, the product quality is influenced, the subsequent rectification load is increased, and various losses are increased.
The utility model has the following contents:
the utility model aims to provide a system for separating and recovering a methanol solution and alkane oil.
The utility model is implemented by the following technical scheme: the separating and recovering system of methanol solution and alkane oil includes extracting tank, oil-water separator, reflux tank and collecting tank, the stock solution inlet of the extraction tank is connected with a methanol condensate main pipe, a first flow valve is arranged on the methanol condensate main pipe, an extractant inlet of the extraction tank is connected with a desalted water main pipe, an adjusting valve is arranged on the desalted water main pipe, the liquid outlet of the extraction tank is connected with the inlet pipeline of a second flow valve, the outlet of the second flow valve is connected with the inlet pipeline of the reflux tank, an overflow port of the extraction tank is connected with an inlet pipeline of a third flow valve, an outlet of the third flow valve is connected with an inlet pipeline of the oil-water separator, an alkane outlet of the oil-water separator is connected with an inlet pipeline of the collecting tank, and a water outlet of the oil-water separator is connected with an inlet pipeline of the reflux tank;
the extraction tank is provided with an observation port, the axis of the observation port and the axis of the overflow port are positioned in the same horizontal plane, the observation port is connected with an inlet pipeline of a first stop valve, and the outlet of the first stop valve is connected with a flange of a flange sight glass through a connecting pipe.
Furthermore, a drainage tube is further arranged on the connecting pipe between the first stop valve and the flange sight glass, the drainage tube is communicated with the inside of the connecting pipe, an outlet of the drainage tube is fixedly connected with an inlet of the oil-water separator, and a second stop valve is arranged on the drainage tube.
Further, the diameter of the overflow port is smaller than that of the observation port.
Furthermore, a horizontal datum line is arranged on the flange sight glass, and the horizontal datum line and the bottom end of the overflow port are located in the same horizontal plane.
The utility model has the advantages that: the quantity of the alkane oil on the liquid surface can be more conveniently determined by adding the flange sight glass, the interface of the alkane oil and the methanol solution can be more accurately controlled, the separation effect of the alkane oil and the methanol solution can be improved, the loss of refined methanol can be reduced, and the yield of the refined methanol can be increased; an oil-water separator is added behind the extraction tank, the oil-water separator separates methanol solution possibly mixed in the alkane oil at the overflow position, and meanwhile, the demulsification capability of the oil-water separator is utilized to further separate the methanol solution from emulsified alkane impurities; under the cooperation of the extraction tank and the oil-water separator, the technical problems that the reflux of alkane impurities interferes with the rectifying tower and methanol solution brings alkane oil products are solved, the load of subsequent rectification is reduced, and the energy consumption is reduced, so that the further separation and removal of alkane oil are realized, and various energy consumptions are reduced; under the cooperation of drainage tube and stop valve, conveniently dismantle the washing to the flange sight glass.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of the utility model;
in the figure: the device comprises an extraction tank 1, a stock solution inlet 11, a solution outlet 12, an overflow port 13, a second flow valve 14, a third flow valve 15, an oil-water separator 2, a reflux tank 3, a collection tank 4, a methanol condensate header pipe 5, a first flow valve 51, a horizontal reference line 6, a drainage pipe 7, a second stop valve 71, a connecting pipe 8, a first stop valve 81, a flange sight glass 9, an observation port 10, a liquid level meter 16, a desalted water header pipe 17 and a regulating valve 18.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the system for separating and recovering methanol solution and alkane oil comprises an extraction tank 1, an oil-water separator 2, a reflux tank 3 and a collection tank 4, wherein a stock solution inlet 11 of the extraction tank 1 is connected with a methanol condensate header pipe 5, and a condensate generated by a cooler at the top of a rectifying tower is partially injected into the extraction tank 1 for extraction and separation; the methanol condensate header pipe 5 is provided with a first flow valve 51, an extractant inlet of the extraction tank 1 is connected with a desalted water header pipe 17, the desalted water header pipe 17 is provided with an adjusting valve 18, desalted water extracts condensate, a liquid outlet 12 of the extraction tank 1 is connected with an inlet pipeline of a second flow valve 14, an outlet of the second flow valve 14 is connected with an inlet pipeline of the reflux tank 3, methanol solution separated from the extraction tank 1 enters the reflux tank 3 for temporary storage for pre-tower reflux, an overflow port 13 of the extraction tank 1 is connected with an inlet pipeline of a third flow valve 15, an outlet of the third flow valve 15 is connected with an inlet pipeline of the oil-water separator 2, alkane oil which possibly contains a small amount of methanol solution and overflows from the extraction tank 1 is subjected to secondary separation in the oil-water separator 2, an alkane outlet of the oil-water separator 2 is connected with an inlet pipeline of the collection tank 4, a water outlet of the oil-water separator 2 is connected with an inlet pipeline of the reflux tank 3, the separated alkane product enters a subsequent alkane treatment unit through a collection tank 4, a small amount of separated methanol solution enters a reflux tank 3, and subsequent rectification treatment is carried out through the reflux tank 3; the first flow valve 51, the second flow valve 14, the third flow valve 15 and the regulating valve 18 are used for controlling the liquid level in the extraction tank 1 to be a constant value, and preferably, a liquid level meter 16 is arranged on the extraction tank 1 to control the liquid level height in real time, so that the regulating functions of the first flow valve 51, the second flow valve 14, the third flow valve 15 and the regulating valve 18 are facilitated, and the thickness of an oil layer in the extraction tank 1 is facilitated to be observed.
The extraction tank 1 is provided with an observation port 10, the axis of the observation port 10 and the axis of the overflow port 13 are positioned in the same horizontal plane, the diameter of the overflow port 13 is smaller than that of the observation port 10, the flange sight glass 9 is provided with a horizontal reference line 6, the horizontal reference line 6 and the bottom end of the overflow port 13 are positioned in the same horizontal plane, the position of an oil surface at the overflow port 13 is determined through the horizontal reference line 6, when the thickness of an oil layer is thick and the liquid level of a methanol solution is below the horizontal reference line 6, the alkane oil can be discharged from the overflow port 13, the methanol solution carried in the alkane oil is reduced, the height of the liquid level is constant, the thickness of the oil surface can be completely observed through the observation port 10, the observation port 10 is connected with an inlet pipeline of a first stop valve 81, the outlet of the first stop valve 81 is in flange connection with a sight glass flange 9 through a connecting pipe 8, a drainage pipe 7 is further arranged on the connecting pipe 8 between the first stop valve 81 and the flange sight glass 9, the drainage tube 7 is communicated with the inside of the connecting tube 8, the outlet of the drainage tube 7 is fixedly connected with the inlet of the oil-water separator 2, the drainage tube 7 is provided with a second stop valve 71, the first stop valve 81 is opened periodically, the flange sight glass 9 is communicated with the inside of the extraction tank 1 through the connecting tube 8, the solution in the extraction tank 1 enters the connecting tube 8, the thickness of an oil layer in the connecting tube 8 is observed, namely the thickness of an oil layer in the extraction tank 1, once the oil layer is thick, the third flow valve 15 of the overflow port 13 is opened to discharge alkane oil, the flange sight glass 9 is observed, the third flow valve 15 is closed until the oil layer is reduced to a certain thickness, the first stop valve 81 is closed, the second stop valve 71 is opened, the material in the connecting tube 8 is discharged to the oil-water separator 2 through the drainage tube 7, and the attachment of the alkane oil to the flange sight glass 9 is reduced.
The specific operation process of the embodiment is as follows:
methanol condensate enters an extraction tank 1 through a methanol condensate header pipe 5 to be extracted through desalted water, the liquid inlet flow rates of the methanol condensate and the desalted water are respectively adjusted through a first flow valve 51 and an adjusting valve 18, the methanol solution separated from the extraction tank 1 enters a reflux tank 3 to be temporarily stored, the liquid outlet flow rate of the methanol solution of the extraction tank 1 is controlled through a second flow valve 14, a stable liquid level value is formed inside the extraction tank 1, a first stop valve 81 is regularly opened according to the alkane oil content in the daily methanol solution, a flange sight glass 9 is communicated with the inside of the extraction tank 1 through a connecting pipe 8, the solution inside the extraction tank 1 enters the connecting pipe 8, the thickness of an oil layer in the connecting pipe 8 is observed, once the oil layer is thick, a third flow valve 15 of an overflow port 13 is opened to discharge the alkane oil, the flange sight glass 9 is observed, until the oil layer is reduced to a certain thickness, the third flow valve 15 is closed, and the first stop valve 81 is closed at the same time, the second stop valve 71 is opened, the material in the connecting pipe 8 is discharged to the oil-water separator 2 through the drainage pipe 7, and the paraffin oil is reduced from attaching to the flange sight glass 9; the alkane oil which possibly contains a small amount of methanol solution and overflows from the extraction tank 1 is subjected to secondary separation in the oil-water separator 2, the separated alkane product enters a subsequent alkane treatment unit through the collection tank 4, the separated small amount of methanol solution enters the reflux tank 3, and the subsequent rectification treatment is performed through the reflux tank 3.
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 (4)
1. The separation and recovery system of the methanol solution and the alkane oil is characterized by comprising an extraction tank, an oil-water separator, a reflux tank and a collection tank, the stock solution inlet of the extraction tank is connected with a methanol condensate main pipe, a first flow valve is arranged on the methanol condensate main pipe, an extractant inlet of the extraction tank is connected with a desalted water main pipe, an adjusting valve is arranged on the desalted water main pipe, the liquid outlet of the extraction tank is connected with the inlet pipeline of a second flow valve, the outlet of the second flow valve is connected with the inlet pipeline of the reflux tank, an overflow port of the extraction tank is connected with an inlet pipeline of a third flow valve, an outlet of the third flow valve is connected with an inlet pipeline of the oil-water separator, an alkane outlet of the oil-water separator is connected with an inlet pipeline of the collecting tank, and a water outlet of the oil-water separator is connected with an inlet pipeline of the reflux tank;
the extraction tank is provided with an observation port, the axis of the observation port and the axis of the overflow port are positioned in the same horizontal plane, the observation port is connected with an inlet pipeline of a first stop valve, and the outlet of the first stop valve is connected with a flange of a flange sight glass through a connecting pipe.
2. The system for separating and recovering a methanol solution from an alkane oil according to claim 1, wherein a drainage tube is further disposed on the connecting tube between the first stop valve and the viewing flange, the drainage tube is communicated with the inside of the connecting tube, an outlet of the drainage tube is fixedly connected to an inlet of the oil-water separator, and a second stop valve is disposed on the drainage tube.
3. The system for separating and recovering a methanol solution from an alkane oil according to claim 1, wherein the diameter of the overflow port is smaller than that of the observation port.
4. The system for separating and recovering a methanol solution from an alkane oil according to claim 3, wherein a horizontal reference line is arranged on the flange sight glass, and the horizontal reference line and the bottom end of the overflow port are positioned in the same horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122174267.0U CN216170101U (en) | 2021-09-08 | 2021-09-08 | Separation and recovery system of methanol solution and alkane oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122174267.0U CN216170101U (en) | 2021-09-08 | 2021-09-08 | Separation and recovery system of methanol solution and alkane oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216170101U true CN216170101U (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122174267.0U Active CN216170101U (en) | 2021-09-08 | 2021-09-08 | Separation and recovery system of methanol solution and alkane oil |
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| CN (1) | CN216170101U (en) |
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2021
- 2021-09-08 CN CN202122174267.0U patent/CN216170101U/en active Active
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