Refining reaction system for preparing clean fuel oil by hydrogenation of anthracene oil

Abstract

The utility model relates to the technical field of clean fuel preparation through anthracene oil hydrogenation, in particular to a refining reaction system for clean fuel oil preparation through anthracene oil hydrogenation. The refining reaction system for preparing clean fuel oil through anthracene oil hydrogenation comprises a primary filter, a feeding buffer tank and a first hydrogenation reactor, the primary filter is connected with a hydrogen-oil mixer through the feeding buffer tank, and the hydrogen-oil mixer is connected with the first hydrogenation reactor through a feeding heating furnace. The first hydrogenation reactor is connected with a diesel heat exchanger through a fourth hydrogenation reactor, the diesel heat exchanger is connected with a thermal high-pressure separator through a water injection device, the top of the thermal high-pressure separator is connected with a deoxygenated water injector through a pipeline, and the bottom of the thermal high-pressure separator is connected with a thermal low-pressure separator through a pipeline. According to the system, the primary filter and the secondary filter are matched for use, the primary filter and the secondary filter can be matched for use, and when the filtering efficiency is reduced, the primary filter and the secondary filter can be automatically flushed to remove impurities, so that the filtering efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of preparing clean fuel by hydrogenation of anthracene oil, in particular to a refining reaction system for preparing clean fuel oil by hydrogenation of anthracene oil. Background Art

[0002] The anthracene oil hydrogenation clean fuel oil refining reaction system is an advanced process technology used to convert anthracene oil into clean fuel oil. The system adopts a hydrogenation refining process to remove impurities such as sulfur and nitrogen in anthracene oil through hydrogenation reaction, and at the same time partially hydrogenates and saturates aromatics to obtain high-quality clean fuel oil. During the reaction process, the raw anthracene oil is heated and mixed with hydrogen before entering the reactor, where it undergoes a hydrogenation reaction under the action of a catalyst. The product clean fuel oil undergoes subsequent treatments such as cooling and separation to obtain the final product.

[0003] In workshop production, anthracene oil is a mixture of multiple oils and contains too many impurities. The existing device uses a single membrane filtration, and there is a problem of significantly reduced efficiency after multiple filtrations. In addition, the device is for continuous production, and disassembly and cleaning of the filter membrane will result in obvious waste of time and reduced production efficiency. In addition, before the hot high-gas air cooler, ammonium salt crystals are precipitated at low temperatures and block the pipeline, which seriously affects production. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the purpose of the utility model is to provide a refining reaction system for producing clean fuel oil by hydrogenation of anthracene oil. Through the coordinated use of a primary filter and a secondary filter, the two can not only be used in conjunction with each other, but also can be automatically flushed and removed when the filtration efficiency decreases, thereby greatly improving the filtration efficiency; through the setting of a water injection device, the ammonium salt at a low temperature is dissolved, thereby avoiding the crystallization of the ammonium salt, and greatly improving the production efficiency of the device.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] The anthracene oil hydrogenation clean fuel oil refining reaction system comprises a primary filter, a feed buffer tank, and a first hydrogenation reactor. The primary filter is connected to a hydrogen-oil mixer through the feed buffer tank, the hydrogen-oil mixer is connected to the first hydrogenation reactor through a feed heating furnace, the first hydrogenation reactor is connected to a diesel heat exchanger through a fourth hydrogenation reactor, the diesel heat exchanger is connected to a hot high-pressure separator through a water injection device, the top of the hot high-pressure separator is connected to a deoxygenated water injector through a pipeline, and the bottom of the hot high-pressure separator is connected to a hot low-pressure separator through a pipeline.

[0007] The primary filter is connected with a mixed oil inlet pipeline, and the mixed oil inlet pipeline is connected with a feed buffer tank through a secondary filter.

[0008] The feed buffer tank is provided with a constant pressure nitrogen sealing protection device, a feed pump is provided between the feed buffer tank and the hydrogen-oil mixer, and a mixed hydrogen inlet pipeline is provided on the hydrogen-oil mixer.

[0009] A reaction bed is arranged inside the first hydrogenation reactor, a second hydrogenation reactor is arranged between the first hydrogenation reactor and the fourth hydrogenation reactor, and a third hydrogenation reactor is arranged between the second hydrogenation reactor and the fourth hydrogenation reactor.

[0010] A mixed oil heat exchanger is arranged between the diesel heat exchanger and the water injection device, and a desalted water inlet pipeline is arranged on the water injection device.

[0011] A mixed hydrogen heat exchanger is provided between the hot high-pressure separator and the deoxygenated water injector, and a cold high-pressure separator is connected to the deoxygenated water injector.

[0012] The hot low-pressure separator is connected to the hydrogen sulfide stripping tower, and a hot low-pressure separator discharge pipeline is arranged on the hot low-pressure separator.

[0013] The primary filter is provided with a flushing liquid pipeline and an impurity outlet. The flushing liquid pipeline is used to flush the filter membrane, and the impurity outlet is used to discharge the impurities flushed.

[0014] The working principle of the utility model is:

[0015] The mixed oil of anthracene oil and wash oil at about 70-80℃ from the device is measured in proportion, and then mixed with the low-fraction oil cooled by the hot low-pressure separator of this part, diesel and tail oil from the fractionation part, and then removed by the feed filter to remove particles larger than 25μm in the raw materials, and enters the feed buffer tank under the cascade control of the feed buffer tank liquid level and flow. The top of the feed buffer tank is equipped with constant pressure nitrogen sealing protection. After the mixed oil is pressurized to 18.3MPaG by the reaction feed pump, it is mixed with mixed hydrogen under flow control. The mixed feed is heat exchanged to 280°C in the reaction effluent / mixed feed heat exchanger and then enters the reaction feed heating furnace to be heated to the temperature required for the reaction. It then passes through the first hydrogenation reactor, the second hydrogenation reactor, the third hydrogenation reactor and the fourth hydrogenation reactor in sequence to carry out desulfurization, denitrogenation, metal and other reactions under the action of the catalyst. The first hydrogenation reactor is provided with three beds, and the second hydrogenation reactor, the third hydrogenation reactor and the fourth hydrogenation reactor are all provided with four beds. The inlet temperature of the reactor and the temperature between the beds are controlled by adjusting the amount of cold hydrogen injected into the pipeline between the reactors.

[0016] The reaction product from the fourth hydrogenation reactor is first cooled by heat exchange with circulating diesel in a circulating diesel heat exchanger, and then cooled to 255°C by heat exchange with feed mixed oil in a mixed oil heat exchanger before entering a hot high-pressure separator for vapor-liquid separation.

[0017] The hot high-fraction gas coming out from the top of the hot high-pressure separator is heat exchanged with the mixed hydrogen in the mixed hydrogen heat exchanger, injected with deoxygenated water, and then cooled to 50°C by the hot high-fraction gas air cooler before entering the cold high-pressure separator (V-21103) for gas, liquid and water three-phase separation. The gas phase (cold high-fraction gas) separated by the cold high-pressure separator goes to the liquid separation tank at the inlet of the circulating hydrogen compressor; the liquid phase (cold high-fraction oil) is decompressed and sent to the cracking cold low-pressure separator; the water phase (sulfur-containing wastewater) is decompressed and sent to the sulfur-containing wastewater tank.

[0018] The hot high-pressure oil coming out from the bottom of the hot high-pressure separator is depressurized under liquid level control and then enters the hot low-pressure separator for gas-liquid separation again. The hot low-pressure gas is depressurized and then goes to the diversion part of the hydrogen sulfide stripping tower; the hot low-pressure oil is discharged from the bottom of the tank under liquid level control and then passes through the cold low-pressure oil heat exchanger to exchange heat with the cold low-pressure oil from the cracking section, and then is cooled to 80°C by the hot low-pressure oil air cooler and then divided into two paths, one of which returns to the feed buffer tank to dilute the feed, and the other is sent to the cracking cold feed buffer tank as cracking feed.

[0019] In order to prevent ammonium salts from crystallizing and clogging pipelines at low temperatures, a water injection system is installed in front of the hot high-gas air cooler to dissolve the ammonium salts.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] The utility model adopts the anthracene oil hydrogenation clean fuel oil refining reaction system, through the coordinated use of the primary filter and the secondary filter, the two can not only be used in conjunction with each other, but also can be automatically flushed and removed when the filtering efficiency is reduced, thereby greatly improving the filtering efficiency; through the setting of the water injection device, the ammonium salt at the low temperature is dissolved, the crystallization of the ammonium salt is avoided, and the production efficiency of the device is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the refining reaction system for producing clean fuel oil by hydrogenation of anthracene oil according to the utility model;

[0023] In the figure: 1. primary filter; 2. secondary filter; 3. feed buffer tank; 4. feed pump; 5. hydrogen-oil mixer; 6. feed heating furnace; 7. first hydrogenation reactor; 8. second hydrogenation reactor; 9. third hydrogenation reactor; 10. fourth hydrogenation reactor; 11. diesel heat exchanger; 12. mixed oil heat exchanger; 13. water injection device; 14. hot high-pressure separator; 15. mixed hydrogen heat exchanger; 16. deoxygenated water injector; 17. cold high-pressure separator; 18. hot low-pressure separator; 19. hydrogen sulfide stripping tower; 20. mixed oil inlet pipeline; 21. constant pressure nitrogen sealing protection device; 22. reaction bed; 23. mixed hydrogen inlet pipeline; 24. desalted water inlet pipeline; 25. hot low-pressure separator outlet pipeline; 26. flushing liquid pipeline; 27. impurity outlet. DETAILED DESCRIPTION

[0024] In order to make the purpose and technical solution of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings.

[0025] Example 1

[0026] like Figure 1 As shown, the refining reaction system for preparing clean fuel oil by hydrogenation of anthracene oil comprises a primary filter 1, a feed buffer tank 3, and a first hydrogenation reactor 7. The primary filter 1 is connected to the hydrogen-oil mixer 5 through the feed buffer tank 3, the hydrogen-oil mixer 5 is connected to the first hydrogenation reactor 7 through the feed heating furnace 6, the first hydrogenation reactor 7 is connected to the diesel heat exchanger 11 through the fourth hydrogenation reactor 10, the diesel heat exchanger 11 is connected to the hot high-pressure separator 14 through the water injection device 13, the top of the hot high-pressure separator 14 is connected to the deoxygenated water injector 16 through a pipeline, and the bottom of the hot high-pressure separator 14 is connected to the hot low-pressure separator 18 through a pipeline. A mixed oil inlet pipeline 20 is connected to the primary filter 1, and the mixed oil inlet pipeline 20 is connected to the feed buffer tank 3 through the secondary filter 2. A constant pressure nitrogen sealing protection device 21 is provided on the feed buffer tank 3, a feed pump 4 is provided between the feed buffer tank 3 and the hydrogen-oil mixer 5, and a mixed hydrogen inlet pipeline 23 is provided on the hydrogen-oil mixer 5. A reaction bed 22 is provided inside the first hydrogenation reactor 7, a second hydrogenation reactor 8 is provided between the first hydrogenation reactor 7 and the fourth hydrogenation reactor 10, and a third hydrogenation reactor 9 is provided between the second hydrogenation reactor 8 and the fourth hydrogenation reactor 10. A mixed oil heat exchanger 12 is provided between the diesel heat exchanger 11 and the water injection device 13, and a desalted water inlet pipeline 24 is provided on the water injection device 13. A mixed hydrogen heat exchanger 15 is provided between the hot high-pressure separator 14 and the deoxygenated water injector 16, and a cold high-pressure separator 17 is connected to the deoxygenated water injector 16. The hot low-pressure separator 18 is connected to the hydrogen sulfide stripping tower 19, and a hot low-pressure separator discharge pipeline 25 is provided on the hot low-pressure separator 18. A flushing liquid pipeline 26 and an impurity outlet 27 are provided on the primary filter 1. The flushing liquid pipeline 26 is used to flush the filter membrane, and the impurity outlet 27 is used to discharge impurities under flushing.

[0027] The above-mentioned anthracene oil hydrogenation clean fuel oil refining reaction system, when in operation, comprises the following steps:

[0028] (1) The mixed oil of anthracene oil and washing oil at a temperature of about 70-80°C from the outside of the device is measured in proportion, and then mixed with the low-fraction oil cooled by the hot low-pressure separator of this part, as well as the diesel and tail oil from the fractionation part, and then passes through the primary filter 1 and the secondary filter 2 to remove particles larger than 25 μm in the raw materials, and enters the feed buffer tank 3 under the cascade control of the liquid level and flow of the feed buffer tank. The top of the feed buffer tank 3 is equipped with a constant pressure nitrogen sealing protection device 21. After the mixed oil is pressurized to 18.3 MPaG by the reaction feed pump 4, it is mixed with mixed hydrogen under flow control. The mixed feed is heated to the required reaction temperature by the feed heating furnace 6 and then passes through the first hydrogenation reactor 7, the second hydrogenation reactor 8, the third hydrogenation reactor 9 and the fourth hydrogenation reactor 10 in sequence, and desulfurization, denitrification, metal and other reactions are carried out under the action of the catalyst; the first hydrogenation reactor 7 is provided with three reaction beds 22, and the second hydrogenation reactor, the third hydrogenation reactor and the fourth hydrogenation reactor are each provided with four reaction beds 22 The inlet temperature of the reactor and the temperature between the beds are controlled by adjusting the amount of cold hydrogen injected into the pipeline between the reactors; (2) the reaction product from the fourth hydrogenation reactor is first cooled by heat exchange with the circulating diesel in the circulating diesel heat exchanger 11, and then cooled to 255°C by heat exchange with the feed mixed oil in the mixed oil heat exchanger 12, and then enters the hot high-pressure separator 14 for vapor-liquid separation; (3) the hot high-fraction gas from the top of the hot high-pressure separator 14 is cooled by heat exchange with the mixed hydrogen in the mixed hydrogen heat exchanger 15. After heating, deoxygenated water is injected, and then the hot high-fraction gas is cooled to 50°C by the hot high-fraction gas air cooler and enters the cold high-pressure separator 17 for gas, liquid and water three-phase separation; (4) The hot high-fraction oil coming out from the bottom of the hot high-pressure separator 14 is depressurized under liquid level control and enters the hot low-pressure separator 18 for gas-liquid separation again; the hot low-fraction gas is depressurized and flows to the diversion part of the hydrogen sulfide stripping tower 19; the hot low-fraction oil is discharged from the bottom of the tank under liquid level control and then passes through the cold low-fraction oil heat exchanger for heat exchange with the cold low-fraction oil from the cracking section.

Claims

1. A refining reaction system for preparing clean fuel oil by hydrogenation of anthracene oil, characterized in that: The invention comprises a primary filter (1), a feed buffer tank (3), and a first hydrogenation reactor (7). The primary filter (1) is connected to a hydrogen-oil mixer (5) through the feed buffer tank (3). The hydrogen-oil mixer (5) is connected to the first hydrogenation reactor (7) through a feed heating furnace (6). The first hydrogenation reactor (7) is connected to a diesel heat exchanger (11) through a fourth hydrogenation reactor (10). The diesel heat exchanger (11) is connected to a hot high-pressure separator (14) through a water injection device (13). The top of the hot high-pressure separator (14) is connected to a deoxygenated water injector (16) through a pipeline. The bottom of the hot high-pressure separator (14) is connected to a hot low-pressure separator (18) through a pipeline.

2. The anthracene oil hydrogenation to clean fuel oil refining reaction system according to claim 1, characterized in that: The primary filter (1) is connected to a mixed oil inlet pipeline (20), and the mixed oil inlet pipeline (20) is connected to a feed buffer tank (3) through a secondary filter (2).

3. The anthracene oil hydrogenation to clean fuel oil refining reaction system according to claim 1, characterized in that: The feed buffer tank (3) is provided with a constant pressure nitrogen sealing protection device (21), a feed pump (4) is provided between the feed buffer tank (3) and the hydrogen-oil mixer (5), and a mixed hydrogen inlet pipeline (23) is provided on the hydrogen-oil mixer (5).

4. The anthracene oil hydrogenation to clean fuel oil refining reaction system according to claim 1, characterized in that: A reaction bed (22) is provided inside the first hydrogenation reactor (7), a second hydrogenation reactor (8) is provided between the first hydrogenation reactor (7) and the fourth hydrogenation reactor (10), and a third hydrogenation reactor (9) is provided between the second hydrogenation reactor (8) and the fourth hydrogenation reactor (10).

5. The anthracene oil hydrogenation to clean fuel oil refining reaction system according to claim 1, characterized in that: A mixed oil heat exchanger (12) is provided between the diesel heat exchanger (11) and the water injection device (13), and a desalted water inlet pipeline (24) is provided on the water injection device (13).

6. The anthracene oil hydrogenation to clean fuel oil refining reaction system according to claim 1, characterized in that: A mixed hydrogen heat exchanger (15) is provided between the hot high-pressure separator (14) and the deoxygenated water injector (16), and a cold high-pressure separator (17) is connected to the deoxygenated water injector (16).

7. The anthracene oil hydrogenation to clean fuel oil refining reaction system according to claim 1, characterized in that: The hot low-pressure separator (18) is connected to the hydrogen sulfide stripping tower (19), and a hot low-pressure separator discharge pipe (25) is provided on the hot low-pressure separator (18).

8. The anthracene oil hydrogenation to clean fuel oil refining reaction system according to claim 1, characterized in that: The primary filter (1) is provided with a flushing liquid pipeline (26) and an impurity outlet (27).

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