CN210065672U - Wax oil hydrocracking system - Google Patents
Wax oil hydrocracking system Download PDFInfo
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- CN210065672U CN210065672U CN201920366310.3U CN201920366310U CN210065672U CN 210065672 U CN210065672 U CN 210065672U CN 201920366310 U CN201920366310 U CN 201920366310U CN 210065672 U CN210065672 U CN 210065672U
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- 238000004517 catalytic hydrocracking Methods 0.000 title claims abstract description 47
- 238000000926 separation method Methods 0.000 claims abstract description 56
- 239000002283 diesel fuel Substances 0.000 claims abstract description 53
- 239000002994 raw material Substances 0.000 claims abstract description 39
- 238000010438 heat treatment Methods 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 10
- 230000003139 buffering effect Effects 0.000 claims description 9
- 238000005194 fractionation Methods 0.000 claims description 8
- 238000002203 pretreatment Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000003921 oil Substances 0.000 description 60
- 238000006243 chemical reaction Methods 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 239000003350 kerosene Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The utility model provides a wax oil hydrocracking system, include: the system comprises a raw material buffer device, a pretreatment device, a separation device, a post-treatment device, a fractionating tower and a diesel oil tower which are connected in sequence, wherein the fractionating tower is communicated with the diesel oil tower in an on-off manner, the diesel oil tower is provided with a first outlet and a second outlet, and the first outlet is communicated with the outside of a wax oil hydrocracking system; the two ends of the first return pipeline are respectively communicated with the second outlet and the raw material buffer device; the diesel oil produced by the diesel oil tower can be selectively output from the first outlet or the second outlet, in the case of the diesel oil output from the first outlet, the wax oil hydrocracking system is used for producing the diesel oil, and in the case of the diesel oil output from the second outlet, the wax oil hydrocracking system is used for producing the light oil. Through the technical scheme provided by the utility model, the problem that the wax oil hydrocracking system among the prior art can not produce the switching of diesel oil and production light oil can be solved.
Description
Technical Field
The utility model relates to a chemical industry equipment technical field particularly, relates to a wax oil hydrocracking system.
Background
At present, most wax oil hydrocracking systems are once-through and full-circulation processes. Wherein, the whole circulation flow mainly comprises tail oil recycling to produce light oil (heavy naphtha and aviation kerosene); the primary pass is mainly to produce tail oil and diesel oil. The existing wax oil hydrocracking system can not switch between diesel oil production and light oil production, and can not adjust when the market demand changes.
SUMMERY OF THE UTILITY MODEL
The utility model provides a wax oil hydrocracking system to the wax oil hydrocracking system who solves among the prior art can not produce the problem of the switching of diesel oil and production light oil.
In order to solve the above problem, the utility model provides a wax oil hydrocracking system, include: the system comprises a raw material buffer device, a pretreatment device, a separation device, a post-treatment device, a fractionating tower and a diesel oil tower which are connected in sequence, wherein the fractionating tower is communicated with the diesel oil tower in an on-off manner, the diesel oil tower is provided with a first outlet and a second outlet, and the first outlet is communicated with the outside of a wax oil hydrocracking system; the two ends of the first return pipeline are respectively communicated with the second outlet and the raw material buffer device; the diesel oil produced by the diesel oil tower can be selectively output from the first outlet or the second outlet, in the case of the diesel oil output from the first outlet, the wax oil hydrocracking system is used for producing the diesel oil, and in the case of the diesel oil output from the second outlet, the wax oil hydrocracking system is used for producing the light oil.
Further, the fractionating tower has a third outlet and a fourth outlet, the third outlet is communicated to the outside of the wax oil hydrocracking system, and the wax oil hydrocracking system further comprises: two ends of the second return pipeline are respectively communicated with the fourth outlet and the raw material buffer device; the tail oil produced by the fractionating tower can be selectively output from the third outlet or the fourth outlet.
Further, raw materials buffer includes cold raw materials buffer tank and hot raw materials buffer tank, and cold raw materials buffer tank, hot raw materials buffer tank and pretreatment device connect in order, and first return line, second return line all communicate with hot raw materials buffer tank.
Further, the fractionation column has a fifth outlet for transferring the contents of the fractionation column to a subsequent apparatus to produce light oil.
Further, the pretreatment device comprises a first heating furnace and a reactor which are connected with each other, wherein the first heating furnace is connected with the raw material buffer device, and the reactor is connected with the separation device.
Further, the separation device comprises a hot high-pressure separation tank and a hot low-pressure separation tank which are connected with each other, wherein the hot high-pressure separation tank is connected with the reactor, and the hot low-pressure separation tank is connected with the post-treatment device.
Further, the separating device also comprises a cold high-pressure separating tank and a cold low-pressure separating tank which are connected with each other, wherein the cold high-pressure separating tank is connected with the hot high-pressure separating tank, and the cold low-pressure separating tank is connected with the post-treatment device.
Further, the post-treatment device comprises a main stripping tower and a flash tank which are connected with each other, wherein the main stripping tower is connected with the separation device, and the flash tank is connected with the fractionating tower.
Furthermore, the post-treatment device also comprises a second heating furnace, the inlet of the second heating furnace is connected with the flash tank, and the outlet of the second heating furnace is connected with the fractionating tower.
Further, the wax oil hydrocracking system also comprises a reboiling furnace, and the reboiling furnace is connected with the diesel tower.
Use the technical scheme of the utility model, set up raw materials buffer, preceding processing apparatus, separator, aftertreatment device, fractionating tower, diesel oil tower and first return line at wax oil hydrocracking system. The diesel oil generated by the diesel oil tower can be selectively output from the first outlet or the second outlet of the diesel oil tower, so that when the diesel oil is required to be produced, the diesel oil can be output to the outside from the first outlet, and when the light oil is required to be produced, the diesel oil is not output from the first outlet, but is returned to the raw material buffer device through the second outlet and the first return pipeline for processing again, so that the light oil can be produced. Therefore, the wax oil hydrocracking system provided by the technical scheme can be used for switching between diesel oil production and light oil production, and flexibly meets the market demand.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic structural diagram of a wax oil hydrocracking system provided by an embodiment of the present invention.
Wherein the figures include the following reference numerals:
11. a cold raw material buffer tank; 12. a hot raw material buffer tank; 13. a first heating furnace; 14. a reactor; 21. a hot high-pressure separation tank; 22. hot low-pressure separation tank; 23. cooling the high-pressure separation tank; 24. cooling and separating the tanks; 31. a main stripper column; 32. a flash tank; 33. a second heating furnace; 41. a fractionating column; 42. a diesel tower; 43. a reboiling furnace; 51. a first return line; 52. a second return line.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a wax oil hydrocracking system, including: the system comprises a raw material buffer device, a pretreatment device, a separation device, a post-treatment device, a fractionating tower 41 and a diesel tower 42 which are connected in sequence, wherein the fractionating tower 41 and the diesel tower 42 can be communicated in an on-off mode, the diesel tower 42 is provided with a first outlet and a second outlet, and the first outlet is communicated to the outside of a wax oil hydrocracking system; a first return pipeline 51, wherein two ends of the first return pipeline 51 are respectively communicated with the second outlet and the raw material buffer device; the diesel oil produced by the diesel oil tower 42 is selectively output from the first outlet, in which case the wax oil hydrocracking system is used to produce diesel oil, or the second outlet, in which case the wax oil hydrocracking system is used to produce light oil.
By applying the technical scheme of the embodiment, a raw material buffer device, a pretreatment device, a separation device, a post-treatment device, a fractionating tower 41, a diesel tower 42 and a first return pipeline 51 are arranged in a wax oil hydrocracking system. Since the diesel oil generated from the diesel tower 42 is selectively output from the first outlet or the second outlet of the diesel tower 42, when the diesel oil is required to be produced, the diesel oil is output from the first outlet to the outside, and when the light oil is required to be produced, the diesel oil is not output from the first outlet but returned to the raw material buffer device through the second outlet and the first return line 51 to be processed again, so that the light oil can be produced. Therefore, the wax oil hydrocracking system provided by the technical scheme can be used for switching between diesel oil production and light oil production, and flexibly meets the market demand.
In this embodiment, the fractionating tower 41 has a third outlet and a fourth outlet, the third outlet is connected to the outside of the wax oil hydrocracking system, and the wax oil hydrocracking system further includes: a second return line 52, both ends of the second return line 52 are respectively communicated with the fourth outlet and the raw material buffer device; the tail oil produced by the fractionating tower 41 can be selectively output from the third outlet or the fourth outlet. When diesel oil is required to be produced, the tail oil produced by the fractionating tower 41 is output from the third outlet, and when light oil is required to be produced, the tail oil is returned to the raw material buffer device through the fourth outlet and the second return line 52 to be treated again, so that light oil can be produced.
In the present embodiment, the raw material buffer device includes a cold raw material buffer tank 11 and a hot raw material buffer tank 12, the cold raw material buffer tank 11, the hot raw material buffer tank 12 and the pretreatment device are connected in sequence, and the first return line 51 and the second return line 52 are both communicated with the hot raw material buffer tank 12. This allows the returned diesel and tail oil to be reprocessed through the hot feed surge tank 12 and subsequent equipment to produce light oil. In addition, the diesel oil and the tail oil with certain temperature are directly conveyed to the hot raw material buffer tank 12 without heating, thereby saving energy.
Further, the fractionation column 41 has a fifth outlet for transferring the materials in the fractionation column 41 to a subsequent apparatus to produce light oil. Specifically, when producing light oil, the diesel oil output from the diesel oil tower 42 and the tail oil output from the fractionating tower 41 are returned to the raw material buffering device, and then are treated again by the pretreatment device, the separation device, the post-treatment device, and the fractionating tower 41, and then are transported from the fifth outlet of the fractionating tower 41 to the subsequent equipment for further treatment, thereby producing light oil.
In this embodiment, the pretreatment apparatus includes a first heating furnace 13 and a reactor 14 connected to each other, wherein the first heating furnace 13 is connected to the raw material buffer apparatus, and the reactor 14 is connected to the separation apparatus. The first heating furnace 13 is used for heating the materials, and the reactor 14 is used for refining and cracking the materials.
In the present embodiment, the separation device includes a hot high separation tank 21 and a hot low separation tank 22 connected to each other, wherein the hot high separation tank 21 is connected to the reactor 14, and the hot low separation tank 22 is connected to the post-treatment device. The hot high-pressure separation tank 21 is used for carrying out gas-liquid separation on the materials, and the hot low-pressure separation tank 22 is used for carrying out secondary gas-liquid separation on the materials.
Further, the separation device also comprises a cold high-pressure separation tank 23 and a cold low-pressure separation tank 24 which are connected with each other, wherein the cold high-pressure separation tank 23 is connected with the hot high-pressure separation tank 21, and the cold low-pressure separation tank 24 is connected with the post-treatment device. The cold high-pressure separation tank 23 is used for performing three-item oil-water-vapor separation on the material output from the hot high-pressure separation tank 21, and the cold low-pressure separation tank 24 is used for performing three-item oil-water-vapor separation again on the material output from the cold high-pressure separation tank 23.
In this embodiment, the post-treatment apparatus comprises a main stripper 31 and a flash drum 32 connected to each other, wherein the main stripper 31 is connected to the separation apparatus and the flash drum 32 is connected to the fractionation column 41. The main stripper 31 is used for removing hydrogen sulfide from the reactant, and the flash tank 32 is used for separating light oil from heavy oil.
In this embodiment, the post-treatment apparatus further comprises a second heating furnace 33, an inlet of the second heating furnace 33 is connected to the flash drum 32, and an outlet of the second heating furnace 33 is connected to the fractionating tower 41. The second heating furnace 33 is used to heat the mixed product.
As shown in fig. 1, the wax oil hydrocracking system further includes a reboiling furnace 43, and the reboiling furnace 43 is connected to the diesel tower 42. The reboiling furnace 43 is used to control the flash point of the diesel.
The method of use of the system is briefly described below: raw materials enter a device to be mixed and enter a cold raw material buffer tank 11, the raw materials enter a hot raw material buffer tank 12 after heat exchange, then enter a first heating furnace 13 to be heated, enter a reactor 14 to be subjected to chemical reaction, reaction effluents enter a hot high-pressure separation tank 21 after coming out of the reactor 14 to be subjected to oil-gas separation, oil at the bottom of the hot high-pressure separation tank 21 enters a hot low-pressure separation tank 22 to be further subjected to oil-gas separation, gas-phase materials output by the hot high-pressure separation tank 21 enter a cold high-pressure separation tank 23 to be subjected to three-phase oil-water separation, oil output from the bottom of the cold high-pressure separation tank 23 enters a cold low-pressure separation tank 24 to be further subjected to three-phase oil-water separation, materials of the hot low-pressure separation tank 22 and the cold low-pressure separation tank 24 in a reaction part enter a main stripping tower 31 to be subjected to hydrogen sulfide removal, oil at the bottom of the main stripping tower 31 enters a flash evaporation tank 32, the diesel oil is collected by the diesel oil tower 42 and is output after being reboiled by the reboiling furnace 43, and when the tail oil and the diesel oil output by the fractionating tower 41 are not good in the market, the tail oil and the diesel oil enter the raw material buffer device for light oil conversion.
By adopting the technical scheme, the capacity of producing the low-condensation-point diesel oil can be reserved, the demand can be met, the light oil (heavy naphtha and aviation kerosene) can be produced, the market can be flexibly adapted, and the maximum benefit is created.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A wax oil hydrocracking system, comprising:
the wax oil hydrocracking system comprises a raw material buffer device, a pretreatment device, a separation device, a post-treatment device, a fractionating tower (41) and a diesel oil tower (42) which are connected in sequence, wherein the fractionating tower (41) is communicated with the diesel oil tower (42) in an on-off mode, the diesel oil tower (42) is provided with a first outlet and a second outlet, and the first outlet is communicated with the outside of the wax oil hydrocracking system;
a first return pipeline (51), wherein two ends of the first return pipeline (51) are respectively communicated with the second outlet and the raw material buffering device;
the diesel oil produced by the diesel oil tower (42) can be selectively output from the first outlet or the second outlet, the wax oil hydrocracking system is used for producing the diesel oil under the condition that the first outlet outputs the diesel oil, and the wax oil hydrocracking system is used for producing the light oil under the condition that the second outlet outputs the diesel oil.
2. A wax oil hydrocracking system according to claim 1, wherein the fractionation tower (41) has a third outlet and a fourth outlet, the third outlet being connected to an outside of the wax oil hydrocracking system, the wax oil hydrocracking system further comprising:
a second return pipeline (52), wherein two ends of the second return pipeline (52) are respectively communicated with the fourth outlet and the raw material buffer device;
the tail oil produced by the fractionating tower (41) can be selectively output from the third outlet or the fourth outlet.
3. The wax oil hydrocracking system according to claim 2, wherein the feedstock buffering means comprises a cold feedstock buffering tank (11) and a hot feedstock buffering tank (12), the cold feedstock buffering tank (11), the hot feedstock buffering tank (12) and the pre-treatment means are connected in sequence, and the first return line (51) and the second return line (52) are both communicated with the hot feedstock buffering tank (12).
4. A wax oil hydrocracking system according to claim 1, wherein the fractionating tower (41) has a fifth outlet for transporting the material in the fractionating tower (41) to a subsequent facility for producing light oil.
5. A wax oil hydrocracking system according to claim 1, wherein said pretreatment apparatus comprises a first heating furnace (13) and a reactor (14) connected to each other, wherein said first heating furnace (13) is connected to said feedstock buffering means, and said reactor (14) is connected to said separation means.
6. A wax oil hydrocracking system according to claim 5, wherein the separation apparatus comprises a hot overhead drum (21) and a hot undersea drum (22) connected to each other, wherein the hot overhead drum (21) is connected to the reactor (14) and the hot undersea drum (22) is connected to the post-treatment apparatus.
7. A wax oil hydrocracking system according to claim 6, wherein the separation apparatus further comprises a cold high-pressure separator tank (23) and a cold low-pressure separator tank (24) connected to each other, wherein the cold high-pressure separator tank (23) is connected to the hot high-pressure separator tank (21), and the cold low-pressure separator tank (24) is connected to the post-treatment apparatus.
8. A wax oil hydrocracking system according to claim 1, wherein said post-treatment apparatus comprises a main stripper (31) and a flash drum (32) connected to each other, wherein said main stripper (31) is connected to said separation apparatus and said flash drum (32) is connected to said fractionation column (41).
9. A wax oil hydrocracking system according to claim 8, wherein said post-treatment apparatus further comprises a second heating furnace (33), an inlet of said second heating furnace (33) being connected to said flash drum (32), an outlet of said second heating furnace (33) being connected to said fractionation column (41).
10. A wax oil hydrocracking system according to claim 1, further comprising a reboiling furnace (43), wherein the reboiling furnace (43) is connected to the diesel tower (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920366310.3U CN210065672U (en) | 2019-03-21 | 2019-03-21 | Wax oil hydrocracking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920366310.3U CN210065672U (en) | 2019-03-21 | 2019-03-21 | Wax oil hydrocracking system |
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| Publication Number | Publication Date |
|---|---|
| CN210065672U true CN210065672U (en) | 2020-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920366310.3U Active CN210065672U (en) | 2019-03-21 | 2019-03-21 | Wax oil hydrocracking system |
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|---|---|
| CN (1) | CN210065672U (en) |
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- 2019-03-21 CN CN201920366310.3U patent/CN210065672U/en active Active
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