CN212548352U - High-solid-content heavy dirty oil separation system - Google Patents
High-solid-content heavy dirty oil separation system Download PDFInfo
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- CN212548352U CN212548352U CN202020719690.7U CN202020719690U CN212548352U CN 212548352 U CN212548352 U CN 212548352U CN 202020719690 U CN202020719690 U CN 202020719690U CN 212548352 U CN212548352 U CN 212548352U
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Abstract
The utility model discloses a high solid heavy sump oil piece-rate system that contains, including the vacuum distillation tower, the vacuum distillation tower divide into upper tower section and lower tower section. The lower tower section of the reduced pressure distillation tower is provided with a sump oil feed inlet, the bottom of the tower is provided with a solid sump oil containing outlet, and the upper tower section is provided with a plurality of sump oil separating side lines which do not contain the solid sump oil and are connected with different boiling points; the outlet of the solid dirty oil is communicated with the oil residue separation device through a tower bottom pump, the dirty oil outlet of the oil residue separation device is communicated with the heating furnace, and the dirty oil flows into the upper tower section of the reduced pressure distillation tower after being heated for distillation and separation. When the system is utilized, components such as wax oil, diesel oil and the like in the solid heavy dirty oil can be recovered to the maximum extent, and the abrasion of equipment and pipelines is reduced as much as possible.
Description
Technical Field
The utility model belongs to the chemical industry field, in particular to high solid heavy sump oil piece-rate system that contains.
Background
The heavy dirty oil with high solid content (more than 1 percent of solid volume) has large viscosity and poor fluidity, is easy to block and wear equipment and pipelines and is extremely difficult to separate.
Because the heavy dirty oil has high viscosity and is difficult to separate by adopting a standing sedimentation method, the prior art generally adopts the following method for separation:
1. separation by a filtration method: because the viscosity of the dirty oil is large and the solid particles in the dirty oil are different in size, the equipment required is too large when the filtering precision is too high, and the recovery rate of diesel oil and wax oil components is low. If the filtration accuracy is too low, the recovered oil contains solid particles.
2. Separating by adopting a general reduced pressure distillation method: the heating furnace is required to be used for heating the heavy dirty oil with high solid content, and has the defects that 1) the furnace tube of the heating furnace is easy to wear; 2) the furnace tube of the heating furnace is easy to coke and block.
3. A plurality of towers are adopted to separate the solid heavy dirty oil. For example: chinese patent application publication No. CN109181744 discloses a solid-containing heavy oil reduced-pressure distillation process unit, which comprises a reduced-pressure flash tank, a reduced-pressure heating furnace, a reduced-pressure tower, a pre-flash device and a pressure control device; the raw material inlet of the reduced-pressure flash tank is connected with the bottom of the normal-pressure tower, the flash top gas outlet of the reduced-pressure flash tank is directly connected with the reduced-pressure tower, and the bottom outlet of the reduced-pressure flash tank is connected with the reduced-pressure heating furnace; the outlet of the reduced-pressure heating furnace is connected with the inlet of the pre-flash device; a pressure control device is arranged between the outlet of the decompression heating furnace and the inlet of the pre-flash device; and the outlet of the pre-flashing device is connected with the bottom of the decompression tower. The device contains a plurality of decompression/distillation units to separate the heavy oil containing solid, and the separation process is complex.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high solid heavy sump oil piece-rate system, utilize this system can furthest retrieve when containing components such as wax oil, diesel oil in the solid heavy sump oil to reduce equipment, pipeline wearing and tearing as far as possible.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the high-solid heavy dirty oil separation system comprises a reduced pressure distillation tower, wherein the reduced pressure distillation tower is divided into an upper tower section and a lower tower section;
the lower tower section of the reduced pressure distillation tower is provided with a sump oil feed inlet, the bottom of the tower is provided with a solid sump oil containing outlet, and the upper tower section is provided with a plurality of sump oil separating side lines which do not contain the solid sump oil and are connected with different boiling points;
the solid sump oil containing outlet is communicated with the oil residue separation device through a tower bottom pump, the sump oil outlet of the oil residue separation device is communicated with the heating furnace, and sump oil flows into the upper tower section of the reduced pressure distillation tower after being heated for distillation and separation.
Furthermore, one or more of the upper tower section sump oil separation side lines of the vacuum distillation tower are provided with branches which are communicated with the heating furnace, and sump oil flows into the vacuum distillation tower through a sump oil feed inlet of the lower tower section of the vacuum distillation tower after being heated for distillation and separation.
Furthermore, a washing device is arranged at the top of the lower tower section of the reduced pressure distillation tower, and the washing device is communicated with a sump oil separation lateral line branch of any upper tower section of the reduced pressure distillation tower to provide washing oil for the washing device.
Furthermore, the bottom of the upper section of the vacuum distillation tower is connected with a residual oil separation side line, the middle section of the vacuum distillation tower is connected with a heavy VGO side line, and the upper section of the vacuum distillation tower is connected with a light VGO side line.
Furthermore, the lower tower section of the reduced pressure distillation tower is provided with a stripping steam inlet, the top of the upper tower section is connected with a reduced pressure evacuation system, and the reduced pressure evacuation system is provided with a light dirty oil outlet and an oily sewage outlet.
The beneficial effects of the utility model reside in that:
1. utilize the utility model discloses piece-rate system separates the high solid heavy sump oil that contains, and the heating furnace sets up in the vacuum distillation tower rear, and the tower bottom material (oiliness, solid sediment) carries out the heating furnace heating of rethread after the dregs of fat separation processing through dregs of fat separator under the vacuum distillation tower earlier, and the high solid heavy sump oil that contains does not directly adopt the heating furnace heating, can prevent heating furnace equipment wearing and tearing, coking, jam.
2. Materials (containing oil and solid residues) at the bottom of the lower tower pass through an oil residue separation device, separated heavy oil is heated by a heating furnace and then used as feeding materials of the upper tower, and deep separation is carried out.
3. The side line oil (side line oil or multi-measuring line mixed oil) on the upper tower section of the reduced pressure distillation tower is heated by a heating furnace and then returns to the tower feeding line to be mixed with the high solid content feeding material, so that the solid content of the mixed material can be reduced, the pipeline abrasion can be reduced, and the viscosity of the mixed material can be reduced to improve the fluidity of the mixed material. Meanwhile, heat is brought to the feeding of the reduced pressure distillation tower, so that the heat required by the reduced pressure distillation is ensured, the feeding temperature of the reduced pressure distillation tower can be reduced as far as possible while the separation effect is ensured, and coking is prevented.
4. One tower achieves the separation function and effect of two towers. The vacuum distillation tower is divided into an upper tower and a lower tower. The upper tower is a separation tower without solid materials and is provided with separation internals (a packing layer or a tray); the lower tower is a solid material-containing separation tower.
5. The washing device is arranged on the lower tower top of the reduced pressure distillation tower, so that solids are prevented from being brought into the upper tower, and meanwhile, the quality index of bottom oil of the lower tower can be adjusted.
Drawings
FIG. 1 is a schematic view of a separation system of the present invention;
wherein: 1. a reduced pressure distillation column; 2. a tower bottom pump; 3. an oil-residue separation device; 4. heating furnace; 5. a washing device; 6. residual oil separation side stream; 7. a heavy VGO sidedraw; 8. a light VGO sidedraw; 9. the system is evacuated under reduced pressure.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific embodiments. The present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art, and the present invention will only be defined by the appended claims.
As shown in figure 1, the high solid content heavy dirty oil separation system comprises a reduced pressure distillation tower 1, wherein the reduced pressure distillation tower 1 is divided into an upper tower section and a lower tower section.
One tower achieves the separation function and effect of two towers. The upper tower is a separation tower without solid materials and is provided with separation internals (a packing layer or a tray); the lower tower is a solid material-containing separation tower.
The lower tower section of the reduced pressure distillation tower 1 is provided with a sump oil feed inlet, the bottom of the tower is provided with a solid sump oil containing outlet, and the upper tower section is provided with a plurality of sump oil separation side lines which do not contain the solid sump oil and are connected with different boiling points.
Preferably, the bottom of the upper section of the vacuum distillation tower 1 is connected with a residual oil separation side line 6, the middle section is connected with a heavy VGO side line 7, and the upper section is connected with a light VGO side line 8. Oil products with different boiling points are separated by controlling the temperature of each section of the reduced pressure distillation tower 1.
In particular, the residue separation side stream 6 is used to separate the upper column bottoms, such as pitch or residue, and includes a draw pump, a heat exchanger, and a draw unit connected to the bottom outlet of the upper column section of the vacuum distillation column 1.
Heavy VGO side line 7 is used for separating heavy VGO components such as wax oil and comprises a draw-off pump, a heat exchanger and a draw-off device which are connected with the outlet of the middle section of the upper tower section of the vacuum distillation tower 1.
A light VGO side line 8 is used for separating light VGO components, such as diesel oil, and comprises a pump, a heat exchanger and a device for pumping which are connected with an upper section outlet of the upper tower section of the vacuum distillation tower 1.
Furthermore, the lower tower section of the reduced pressure distillation tower 1 is provided with a stripping steam inlet, the top of the upper tower section is connected with a reduced pressure evacuation system 9, and the reduced pressure evacuation system 9 is provided with a light dirty oil outlet and an oily sewage outlet.
The outlet of the solid dirty oil is communicated with an oil residue separation device 3 through a tower bottom pump 2, the dirty oil outlet of the oil residue separation device 3 is communicated with a heating furnace 4, and the dirty oil flows into the upper tower section of the reduced pressure distillation tower 1 for distillation and separation after being heated.
The heating furnace 4 is arranged behind the reduced pressure distillation tower 1, materials (containing oil and solid residues) at the bottom of the tower under the reduced pressure distillation tower 1 are subjected to oil residue separation treatment by the oil residue separation device 3 and then enter the heating furnace 4 for heating, high-solid heavy dirty oil is not directly heated by the heating furnace 4, and the equipment of the heating furnace 4 can be prevented from being worn, coked and blocked.
Materials (containing oil and solid residues) at the bottom of the lower tower pass through an oil residue separation device 3, separated heavy oil is heated by a heating furnace 4 and then used as feeding materials of the upper tower, and deep separation is carried out.
Furthermore, one or more upper tower segment sump oil separation side lines of the vacuum distillation tower 1 are provided with branches which are communicated with the heating furnace 4, and sump oil flows into the vacuum distillation tower 1 for distillation and separation through a sump oil feed inlet of a lower tower segment of the vacuum distillation tower 1 after being heated.
The side line oil (side line oil or multi-measuring line mixed oil) on the upper tower section of the reduced pressure distillation tower is heated by the heating furnace 4 and then returns to the tower feeding line to be mixed with the high solid content feeding material, so that the solid content of the mixed material can be reduced, the pipeline abrasion can be reduced, and the viscosity of the mixed material can be reduced to improve the fluidity of the mixed material. Meanwhile, heat is brought to the feeding of the reduced pressure distillation tower, so that the heat required by the reduced pressure distillation is ensured, the feeding temperature of the reduced pressure distillation tower can be reduced as far as possible while the separation effect is ensured, and coking is prevented.
Furthermore, a washing device 5 is arranged at the top of the lower tower section of the reduced pressure distillation tower 1, and the washing device 5 is communicated with a sump oil separation side branch of the upper tower section of any reduced pressure distillation tower 1 to provide washing oil for the washing device 5.
The washing device 5 can prevent solids from being brought into the upper tower, and can adjust the quality index of bottom oil of the lower tower. The washing device 5 can be a spray washing pipe or a spray head, the spray washing oil adopts upper tower side line oil, oil of any measuring line (preferably the lowest measuring line) is used for washing solid-containing oil gas, and the height from the lower part of the spray washing pipe or the spray head at the top of the lower tower to the top of the feeding pipe opening is not less than 3 m.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (5)
1. High solid heavy dirty oil piece-rate system that contains, including vacuum distillation tower (1), vacuum distillation tower (1) divide into upper tower section and lower tower section, its characterized in that:
the lower tower section of the reduced pressure distillation tower (1) is provided with a sump oil feed inlet, the bottom of the tower is provided with a solid sump oil containing outlet, and the upper tower section is provided with a plurality of sump oil separating side lines which do not contain the solid sump oil and are connected with different boiling points;
the solid sump oil containing outlet is communicated with the oil residue separation device (3) through a tower bottom pump (2), the sump oil outlet of the oil residue separation device (3) is communicated with the heating furnace (4), and sump oil flows into the upper tower section of the reduced pressure distillation tower (1) for distillation and separation after being heated.
2. The high solid content heavy dirty oil separation system according to claim 1, characterized in that: one or more of the vacuum distillation tower (1) upper tower section sump oil separation side lines are provided with branches which are communicated with the heating furnace (4), and sump oil flows into the vacuum distillation tower (1) through a sump oil feed inlet of the vacuum distillation tower (1) lower tower section after being heated for distillation and separation.
3. The high solid content heavy dirty oil separation system according to claim 1, characterized in that: the top of the lower tower section of the reduced pressure distillation tower (1) is provided with a washing device (5), and the washing device (5) is communicated with a dirty oil separation lateral line branch of the upper tower section of the reduced pressure distillation tower (1) to provide washing oil for the washing device (5).
4. The high solid content heavy dirty oil separation system according to claim 1, characterized in that: the bottom of the upper section of the vacuum distillation tower (1) is connected with a residual oil separation side line (6), the middle section of the vacuum distillation tower is connected with a heavy VGO side line (7), and the upper section of the vacuum distillation tower is connected with a light VGO side line (8).
5. The high solid content heavy dirty oil separation system according to claim 1, characterized in that: the lower tower section of the reduced pressure distillation tower (1) is provided with a stripping steam inlet, the top of the upper tower section is connected with a reduced pressure evacuation system (9), and the reduced pressure evacuation system (9) is provided with a light dirty oil outlet and an oily sewage outlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020719690.7U CN212548352U (en) | 2020-05-06 | 2020-05-06 | High-solid-content heavy dirty oil separation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020719690.7U CN212548352U (en) | 2020-05-06 | 2020-05-06 | High-solid-content heavy dirty oil separation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111925821A (en) * | 2020-07-21 | 2020-11-13 | 武汉金中石化工程有限公司 | Separation method of high-solid-content heavy sump oil |
| CN113457187A (en) * | 2021-07-02 | 2021-10-01 | 武汉金中石化工程有限公司 | Suspension bed hydrogenation solid-containing oil distillation equipment |
-
2020
- 2020-05-06 CN CN202020719690.7U patent/CN212548352U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111925821A (en) * | 2020-07-21 | 2020-11-13 | 武汉金中石化工程有限公司 | Separation method of high-solid-content heavy sump oil |
| CN111925821B (en) * | 2020-07-21 | 2022-08-12 | 武汉金中石化工程有限公司 | Separation method of high-solid-content heavy sump oil |
| CN113457187A (en) * | 2021-07-02 | 2021-10-01 | 武汉金中石化工程有限公司 | Suspension bed hydrogenation solid-containing oil distillation equipment |
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