CN214612311U - Heavy oil combined fractionating device - Google Patents
Heavy oil combined fractionating device Download PDFInfo
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- CN214612311U CN214612311U CN202120998545.1U CN202120998545U CN214612311U CN 214612311 U CN214612311 U CN 214612311U CN 202120998545 U CN202120998545 U CN 202120998545U CN 214612311 U CN214612311 U CN 214612311U
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Abstract
The utility model discloses a heavy oil combined fractionating device, which comprises a decompression tower, a reflux pump, a first heat exchanger group, a second heat exchanger group, a first air cooler, a second air cooler, a tower top water cooler, a liquid separating tank, a vacuum pump, an atmospheric tank and an outward-feeding pump; the outlet of the tower top is connected with a water cooler at the tower top, the gas phase outlet of the water cooler at the tower top is connected with the inlet of a liquid separating tank, the outlet of the liquid separating tank is connected with the inlet of a vacuum pump, and the liquid phase outlet of the water cooler at the tower top is connected with the inlet of a large gas tank; the reflux outlet is connected with a reflux pump, the outlet of the reflux pump is connected with three branches, the first branch is sequentially connected with a first heat exchanger group, a first air cooler and a cold reflux inlet, the second branch is connected with a hot reflux inlet, and the third branch discharges oil; and the outlet at the bottom of the tower is sequentially connected with the outward feeding pump, the second heat exchanger group and the second air cooler. The utility model discloses make up the refining with multiple raw materials to carry out centralized processing to the produced heavy oil of each workshop section, and still have the advantage that fractionation is effectual and use cost is low.
Description
Technical Field
The utility model relates to an atmospheric tower heavy oil deep-processing technical field, concretely relates to heavy oil combination fractionation device.
Background
At present, when a rectification device refines petroleum, a large amount of residual oil such as tail oil, dewaxed oil and the like is obtained by rectification in a normal pressure device, most of the residual oil is called heavy oil, and the heavy oil is collected after being produced, mainly because the heavy oil can also be used for refining a large amount of valuable oil products, however, the cost of secondary refining of the heavy oil or the cost of processing by a third party is high by adopting the current device, which also causes the problem that the processing of the heavy oil is troublesome in the whole production, so the inventor wants to design a heavy oil fractionation device, and the heavy oil produced in each section is intensively processed to obtain valuable products.
Disclosure of Invention
The utility model aims at providing a heavy oil combination fractionating device which has good fractionation effect and low use cost aiming at the defects existing in the prior art, and can carry out combination refining on various raw materials, thereby carrying out centralized processing on the heavy oil produced in each section at present.
The technical scheme of the utility model is that:
a heavy oil combined fractionation device comprises a pressure reduction tower, a reflux pump, a first heat exchanger group, a second heat exchanger group, a first air cooler, a second air cooler, a tower top water cooler, a liquid separation tank, a vacuum pump, an atmosphere tank and an external pump;
the vacuum tower is provided with a raw material inlet, a steam inlet, a tower top outlet, a cold reflux inlet, a reflux outlet, a hot reflux inlet and a tower bottom outlet, and the vacuum tower is internally provided with a filler and a tower tray;
the top outlet of the tower is connected with an inlet guide pipe of a tower top water cooler, a gas phase outlet at the top of the tower top water cooler is connected with an inlet guide pipe of a liquid separating tank, an outlet of the liquid separating tank is connected with an inlet guide pipe of a vacuum pump, a liquid phase outlet at the bottom of the tower top water cooler is connected with an inlet guide pipe of an atmospheric tank, and the atmospheric tank is also provided with a tail gas outlet, an oil outlet and a sewage outlet;
the reflux outlet is connected with an inlet guide pipe of a reflux pump, the outlet of the reflux pump is connected with three branches, a first branch is connected with a first heat exchanger group, a first air cooler and a cold reflux inlet in sequence, a second branch is connected with a hot reflux inlet, and a third branch discharges oil;
and the tower bottom outlet is sequentially connected with the external pump, the second heat exchanger group and the second air cooler through a guide pipe.
Preferably, the first heat exchanger group comprises three heat exchangers connected in series or in parallel, and the second heat exchanger group comprises two heat exchangers connected in series or in parallel.
Preferably, the liquid separation tank is composed of two parallel liquid separation tanks.
Preferably, the oil outlet of the large air tank is connected with a light diesel pump through a pipeline.
Preferably, a sewage pump is connected to the sewage outlet of the atmosphere tank through a pipeline.
Preferably, the outlet of the vacuum pump is connected with two branches, wherein one branch is connected to a conduit between the outlet of the tower top and the inlet of the water cooler of the tower top, and the other branch is evacuated.
Compared with the prior art, the utility model, have following advantage:
the utility model discloses can refine back the heavy oil of present rectification equipment output, make the heavy oil constantly distill in the tower through the vacuum tower to obtain various fractions, and make gas-liquid distribution more even, pressure reduction through the cold and hot backward flow of vacuum tower, thereby the separation effect improves, has realized "deep-drawing", has improved total extraction rate.
The heat required by distillation and the formed vacuum environment are provided by the stripping steam in the vacuum tower, so that the pressure of the vacuum tower is reduced, the oil is vaporized at the temperature lower than the boiling point of the oil, the oil is prevented from cracking and coking, different target products are obtained, and the product collection efficiency is higher.
In addition, the processing raw materials can be used in a combined way, so that the dewaxing oil and part of tail oil can be recycled, and the raw material processing cost is reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure: 1. the system comprises a tower top outlet, 2, a vacuum tower, 3, a raw material inlet, 4, a steam inlet, 5, a tower bottom outlet, 6, a cold reflux inlet, 7, a reflux outlet, 8, a first air cooler, 9, a hot reflux inlet, 10, a reflux pump, 11, a first heat exchanger group, 12, an external conveying pump, 13, a second heat exchanger group, 14, a second air cooler, 15, a tower top water cooler, 16, an atmospheric tank, 17, a tail gas outlet, 18, a sewage outlet, 19, an oil liquid outlet, 20, a liquid separating tank, 21, a vacuum pump, 22, a light diesel oil pump, 23 and a sewage pump.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Example 1
Referring to fig. 1, a heavy oil combined fractionation device includes a vacuum tower 2, a reflux pump 10, a first heat exchanger group 11, a second heat exchanger group 13, a first air cooler 8, a second air cooler 13, a tower top water cooler 15, a knockout drum 20, a vacuum pump 21, an atmospheric tank 16, and an external pump 12.
The pressure reducing tower 2 is provided with a raw material inlet 3, a steam inlet 4, a tower top outlet 1, a cold reflux inlet 6, a reflux outlet 7, a hot reflux inlet 9 and a tower bottom outlet 5, and the pressure reducing tower 2 is internally provided with a filler and a tower tray.
The outlet 1 at the top of the tower is connected with an inlet conduit of a water cooler 15 at the top of the tower, a gas phase outlet at the top of the water cooler 15 at the top of the tower is connected with an inlet conduit of a liquid separating tank 20, and an outlet of the liquid separating tank 20 is connected with an inlet conduit of a vacuum pump 21.
A liquid phase outlet at the bottom of the tower top water cooler 15 is connected with an inlet conduit of an atmospheric tank 16, and the atmospheric tank 16 is also provided with a tail gas outlet 17, an oil liquid outlet 19 and a sewage outlet 18.
The reflux outlet 7 is connected with a reflux pump 10 through a conduit, and the outlet of the reflux pump 10 is connected with three branches.
The first branch is sequentially connected with the first heat exchanger group 11, the first air cooler 8 and the cold reflux inlet 6 to form cold reflux, the second branch is connected with the hot reflux inlet 9 to form hot reflux, and the third branch discharges oil.
The tower bottom outlet 5 is connected with an outward pump 12, a second heat exchanger group 13 and a second air cooler 13 in sequence through a conduit.
The working process is as follows:
the method comprises the following steps of conveying the second-wax-reduced oil, tail oil at the bottom of a decompression tower 2 and heavy oil at other sections into the decompression tower 2 as raw materials, injecting stripping steam into the bottom of the decompression tower 2 from a steam inlet 4, conveying materials in the middle of the decompression tower 2 to a reflux pump 10 through a reflux outlet 7, dividing the materials into three branches through the reflux pump 10, enabling a first branch to flow through a first heat exchanger group 11 and a first air cooler 8 and then reflux into the decompression tower to form cold reflux, enabling a second branch to flow back into the decompression tower as hot reflux, and enabling a third branch to be discharged and collected or sampled for use.
The tail oil fractionated in the vacuum tower 2 flows out through the tower bottom outlet 5, then flows through the second heat exchanger group 13 and the second air cooler 14 and is collected, the tail oil can also be divided into two parts, one part is collected, the other part is conveyed back to the vacuum tower for recycling, a reboiling furnace can be connected in series on a pipeline connected with the recycling part for heating, and the production efficiency is improved.
The gas phase fractionated by the decompression tower 2 is conveyed to a tower top water cooler 15 through a tower top outlet 1, the gas phase is cooled and then enters a liquid separation tank 20, and vacuum pumping is carried out by a vacuum pump 21, wherein the liquid separation tank 20 can be two liquid separation tanks connected in parallel so as to improve the working efficiency;
the liquid phase liquefied by the tower top water cooler 15 enters an atmospheric tank 16 for oil, gas and water three-phase separation, wherein the separated gas is discharged outside, and the light diesel oil and the sewage are respectively connected with pipelines for collection.
The utility model discloses can handle the heavy oil of present rectification equipment output, its cold and hot backward flow through decompression tower 2 makes gas-liquid distribution more even, pressure drop reduces, the separation effect improves, "deep-drawing" has been realized, has improved total extraction rate.
The heat quantity required by distillation is provided by stripping steam in the vacuum tower 2, and the pressure of the vacuum tower 2 is reduced under the vacuum environment, so that oil products are vaporized at the temperature lower than the boiling point of the oil products, and the collection efficiency of the products is higher.
In addition, the wax oil and partial recycled tail oil are added in the raw materials, so that the selectivity of the raw materials is wider, and the cost of the raw materials is lower.
Example 2
The embodiment is further optimized on the basis of embodiment 1, and specifically comprises the following steps:
the first heat exchanger group 11 comprises three heat exchangers connected in series or in parallel and is respectively used as a raw material heat exchanger, a desalted water heat exchanger and a refined diesel oil heat exchanger of other sections in the current whole process flow;
including two heat exchangers of series connection or parallelly connected in the second heat exchanger group 13, regard as the debutanizer feeding heat exchanger and the raw materials heat exchanger in present whole process flow respectively and use, thereby can make the utility model discloses an other each workshop section are used to the waste heat to make the waste heat obtain rational utilization.
Example 3
The embodiment is further optimized on the basis of embodiment 1 or 2, and specifically comprises the following steps:
the oil outlet 19 of the atmosphere tank 16 is connected with a light diesel oil pump 22, and the sewage outlet 18 of the atmosphere tank 16 is connected with a sewage pump 23 so as to send out light diesel oil and sewage.
The outlet of the vacuum pump 21 is connected with two branches, wherein the first branch is connected to a conduit between the outlet 1 at the top of the tower and the inlet of the water cooler 15 at the top of the tower, and the second branch is evacuated;
the gas in the guide pipe between the tower top outlet 1 and the inlet of the tower top water cooler 15 can be cooled through the first branch, and the cooling and liquefying effects are further improved.
The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge range of those skilled in the art without departing from the spirit of the present invention, and the changed contents still belong to the protection scope of the present invention.
Claims (6)
1. A heavy oil combination fractionation device is characterized in that: the system comprises a pressure reduction tower, a reflux pump, a first heat exchanger group, a second heat exchanger group, a first air cooler, a second air cooler, a tower top water cooler, a liquid separation tank, a vacuum pump, an atmosphere tank and an external pump;
the vacuum tower is provided with a raw material inlet, a steam inlet, a tower top outlet, a cold reflux inlet, a reflux outlet, a hot reflux inlet and a tower bottom outlet, and the vacuum tower is internally provided with a filler and a tower tray;
the top outlet of the tower is connected with an inlet guide pipe of a tower top water cooler, a gas phase outlet at the top of the tower top water cooler is connected with an inlet guide pipe of a liquid separating tank, an outlet of the liquid separating tank is connected with an inlet guide pipe of a vacuum pump, a liquid phase outlet at the bottom of the tower top water cooler is connected with an inlet guide pipe of an atmospheric tank, and the atmospheric tank is also provided with a tail gas outlet, an oil outlet and a sewage outlet;
the reflux outlet is connected with an inlet guide pipe of a reflux pump, the outlet of the reflux pump is connected with three branches, a first branch is connected with a first heat exchanger group, a first air cooler and a cold reflux inlet in sequence, a second branch is connected with a hot reflux inlet, and a third branch discharges oil;
and the tower bottom outlet is sequentially connected with the external pump, the second heat exchanger group and the second air cooler through a guide pipe.
2. The combined heavy oil fractionation apparatus according to claim 1, wherein: the first heat exchanger group comprises three heat exchangers connected in series or in parallel, and the second heat exchanger group comprises two heat exchangers connected in series or in parallel.
3. The combined heavy oil fractionation apparatus according to claim 1, wherein: the liquid separation tank is connected in parallel.
4. The combined heavy oil fractionation apparatus according to claim 1, wherein: and the oil outlet of the large gas tank is connected with a light diesel pump through a pipeline.
5. The combined heavy oil fractionation apparatus according to claim 1, wherein: and a sewage outlet of the large gas tank is connected with a sewage pump through a pipeline.
6. The combined heavy oil fractionation apparatus according to claim 1, wherein: the outlet of the vacuum pump is connected with two branches, wherein one branch is connected to a conduit between the outlet of the tower top and the inlet of the water cooler of the tower top, and the other branch is emptied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120998545.1U CN214612311U (en) | 2021-05-11 | 2021-05-11 | Heavy oil combined fractionating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120998545.1U CN214612311U (en) | 2021-05-11 | 2021-05-11 | Heavy oil combined fractionating device |
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| Publication Number | Publication Date |
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| CN214612311U true CN214612311U (en) | 2021-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120998545.1U Active CN214612311U (en) | 2021-05-11 | 2021-05-11 | Heavy oil combined fractionating device |
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| CN (1) | CN214612311U (en) |
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2021
- 2021-05-11 CN CN202120998545.1U patent/CN214612311U/en active Active
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