CN112080321A - Fuel oil hydrogenation ammonia injection cracking device and process thereof - Google Patents
Fuel oil hydrogenation ammonia injection cracking device and process thereof Download PDFInfo
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- CN112080321A CN112080321A CN202011096117.6A CN202011096117A CN112080321A CN 112080321 A CN112080321 A CN 112080321A CN 202011096117 A CN202011096117 A CN 202011096117A CN 112080321 A CN112080321 A CN 112080321A
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- pressure
- ammonia
- tank
- oil
- fuel oil
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 34
- 239000000295 fuel oil Substances 0.000 title claims abstract description 26
- 238000002347 injection Methods 0.000 title claims abstract description 26
- 239000007924 injection Substances 0.000 title claims abstract description 26
- 238000005336 cracking Methods 0.000 title claims abstract description 23
- 238000005984 hydrogenation reaction Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000001257 hydrogen Substances 0.000 claims abstract description 31
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 31
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000000926 separation method Methods 0.000 claims abstract description 24
- 238000004517 catalytic hydrocracking Methods 0.000 claims abstract description 18
- 238000007670 refining Methods 0.000 claims abstract description 17
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims abstract description 16
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 12
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 12
- 239000003921 oil Substances 0.000 claims description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 229910052717 sulfur Inorganic materials 0.000 claims description 19
- 239000011593 sulfur Substances 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 239000007791 liquid phase Substances 0.000 claims description 12
- 230000002378 acidificating effect Effects 0.000 claims description 11
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 7
- 238000011084 recovery Methods 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 150000001336 alkenes Chemical class 0.000 claims description 3
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000012071 phase Substances 0.000 claims description 3
- 238000005191 phase separation Methods 0.000 claims description 3
- 150000002431 hydrogen Chemical class 0.000 abstract description 4
- 239000000047 product Substances 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 4
- UYJXRRSPUVSSMN-UHFFFAOYSA-P ammonium sulfide Chemical compound [NH4+].[NH4+].[S-2] UYJXRRSPUVSSMN-UHFFFAOYSA-P 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G67/00—Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one process for refining in the absence of hydrogen only
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/20—Characteristics of the feedstock or the products
- C10G2300/201—Impurities
- C10G2300/202—Heteroatoms content, i.e. S, N, O, P
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention discloses a fuel oil hydrogenation ammonia injection cracking device and a process thereof, wherein the fuel oil hydrogenation ammonia injection cracking device comprises the following structural units: the system comprises a refining reactor, a hydrocracking reactor, a high-pressure separation tank, a low-pressure separation tank, a cold high-pressure separation tank, a recycle hydrogen buffer tank, a heat exchanger, an air cooler, a compressor, an ammonia water tank and a high-pressure pump. The cracking device can reduce the concentration of hydrogen sulfide in the circulating hydrogen, improve the hydrocracking efficiency of the fuel oil and reduce the processing cost.
Description
Technical Field
The invention relates to the field of fuel oil hydrocracking, in particular to a fuel oil hydrogenation ammonia injection device and a fuel oil hydrogenation ammonia injection process.
Background
The wax oil processed by the cracking reaction unit of the fuel oil hydrogenation device is designed to be low-sulfur wax oil with the sulfur content of less than 3000mg/kg, the processing amount is designed to be 53t/h (low-sulfur wax oil is 38t/h, low-sulfur tail oil is 15t/h), and the concentration of hydrogen sulfide in circulating hydrogen is less than 1000 mg/kg; in the actual production process, the processing raw material wax oil has the sulfur content of 20000mg/kg, so that the processing raw material wax oil needs to be mixed with low-sulfur tail oil (the sulfur content is less than 100mg/kg) for feeding, the maximum processing capacity of the high-sulfur wax oil is 8t/h, a 45t/h system of the low-sulfur tail oil carries a large amount of sulfur, hydrogen sulfide is generated after hydrogenation, the concentration of the hydrogen sulfide in the circulating hydrogen is more than 3000mg/kg, the high-concentration hydrogen sulfide brings great hidden dangers to the safe and long-term operation of equipment such as a circulating hydrogen compressor, a reaction product heat exchanger and the like, the desulfurization reaction is inhibited, and the improvement of the processing capacity of the raw material of the device is also inhibited.
Disclosure of Invention
Based on the above problems, an object of the present invention is to provide a fuel oil hydrogenation ammonia injection device, which adds an ammonia water injection pipeline flow in a water injection system behind a hydrocracking reactor, so that hydrogen sulfide and ammonia gas react in an aqueous solution to generate ammonium sulfide, and the ammonium sulfide is dissolved in the aqueous solution, so as to effectively reduce the content of hydrogen sulfide in circulating hydrogen, and finally, the concentration of hydrogen sulfide in the circulating hydrogen is reduced to below 1000mg/kg, the aqueous solution containing ammonium sulfide and reacted oil are subjected to oil-water separation in a separation tank, and the aqueous solution is sent to an acidic water stripping unit for purification treatment.
The fuel oil hydrogenation ammonia injection device comprises the following structural units:
the system comprises a refining reactor, a hydrocracking reactor, a high-pressure separation tank, a low-pressure separation tank, a cold high-pressure separation tank, a recycle hydrogen buffer tank, a heat exchanger, an air cooler, a compressor, an ammonia water tank and a high-pressure pump.
Preferably, the refining reactor is connected with the hydrocracking reactor, the other end of the hydrocracking reactor is connected with the high pressure separator, the upper end of the high pressure separator is connected with the heat exchanger, the heat exchanger is connected with the air cooler, the air cooler is connected with the cold high pressure separator, the upper end of the cold high pressure separator is connected with the circulating hydrogen buffer tank, the lower end of the cold high pressure separator is connected with the acidic water stripping unit, and the other end of the acidic water stripping unit is connected with an ammonia gas recovery device.
Preferably, the other end of the recycle hydrogen buffer tank is connected with the compressor, and the compressor is connected with the refining reactor pipeline.
Preferably, the lower end of the high-pressure separation tank is connected with the low-pressure separation tank, the other end of the low-pressure separation tank is connected with the rectification unit, and the rectification unit is connected with the cold high-pressure separation tank through a pipeline.
Preferably, an ammonia water tank is arranged between the heat exchanger and the air cooler and connected with a high-pressure pump.
The invention also provides a fuel oil hydrogenation ammonia injection cracking process, which comprises the following steps:
providing a fuel oil hydrogenation ammonia injection cracking device;
mixing the heated high-sulfur raw oil with hydrogen, and then entering a refining reactor from the top to react to remove sulfur, nitrogen, aromatic hydrocarbon, olefin and oxygen in the raw oil, wherein a large amount of hydrogen sulfide can be generated in the process;
the reacted materials continuously enter a hydrocracking reactor for cracking reaction, macromolecular organic matters are cracked into micromolecular organic matters, and products after the reaction enter a high molecular tank for gas-liquid phase separation;
the gas phase passes through a heat exchanger, high-concentration ammonia in an ammonia water tank is injected into a reaction system by means of high-pressure water injection and a high-pressure pump, and then is cooled by an air cooler to become cold liquid-phase oil and hydrogen;
hydrogen enters a circulating hydrogen buffer tank, is continuously compressed by a compressor and then is mixed with high-sulfur raw oil to enter a refining reactor for reaction again, cold liquid-phase oil enters a cold high-pressure separation tank for oil-water separation, the separated oil enters a rectification unit to produce finished oil, water enters an acidic water stripping unit to separate hydrogen sulfide and ammonia dissolved in the water, and the ammonia is collected by an ammonia recovery device;
the liquid phase separated from the high-pressure separation tank enters the low-pressure separation tank for flash evaporation and pressure reduction, and then the oil product is sent to a rectification unit to produce the finished oil product.
Compared with the prior art, the invention has the following beneficial effects: the cracking device can reduce the concentration of hydrogen sulfide in the circulating hydrogen, finally reduce the concentration of the hydrogen sulfide in the circulating hydrogen to be below 1000mg/kg, simultaneously improve the hydrocracking efficiency of fuel oil, increase the processing amount of the fuel oil to 20t/h and reduce the processing cost.
Drawings
FIG. 1 is a fuel oil hydrogenation ammonia injection cracking device according to the present invention,
the system comprises a refining reactor 1, a hydrocracking reactor 2, a high-pressure separating tank 3, a low-pressure separating tank 4, a cold high-pressure separating tank 5, a circulating hydrogen buffer tank 6, a heat exchanger 7, an air cooler 8, a compressor 9, an ammonia water tank 10, a high-pressure pump 11, an acidic water stripping unit 12, an ammonia gas recovery device 13 and a rectifying device 14.
Detailed Description
The present invention will be further described with reference to the following specific examples.
A fuel oil hydrogenation ammonia injection cracking device comprises the following structural units:
the system comprises a refining reactor 1, a hydrocracking reactor 2, a high-pressure separating tank 3, a low-pressure separating tank 4, a cold high-pressure separating tank 5, a circulating hydrogen buffer tank 6, a heat exchanger 7, an air cooler 8, a compressor 9, an ammonia water tank 10 and a high-pressure pump 11.
The refining reactor 1 and the hydrocracking reactor 2, the other end of the hydrocracking reactor 2 with the high-pressure separator 3 is connected, the upper end of the high-pressure separator 3 is connected with the heat exchanger 7, the heat exchanger 7 is connected with the air cooler 8, the air cooler 8 is connected with the cold high-pressure separator 5, the upper end of the cold high-pressure separator 5 is connected with the circulating hydrogen buffer tank 6, the lower end of the cold high-pressure separator 5 is connected with an acidic water stripping unit 12, and the other end of the acidic water stripping unit 12 is connected with an ammonia gas recovery device 13. The other end of the recycle hydrogen buffer tank 6 is connected with the compressor 9, and the compressor 9 is connected with the refining reactor 1 through a pipeline. The lower extreme of high branch jar 3 with low branch jar 4 links to each other, the other end of low branch jar 4 links to each other with rectifying unit 14, rectifying unit 14 with cold high branch jar 5 tube coupling. An ammonia water tank 10 is arranged between the heat exchanger 7 and the air cooler 8, and the ammonia water tank 10 is connected with a high-pressure pump 11.
A fuel oil hydrogenation ammonia injection cracking process comprises the following steps:
providing the fuel oil hydrogenation ammonia injection cracking device;
the heated high-sulfur raw oil is mixed with hydrogen and then enters a refining reactor 1 from the top to react and remove sulfur, nitrogen, aromatic hydrocarbon, olefin and oxygen in the raw oil, and a large amount of hydrogen sulfide can be generated in the process;
the reacted materials continuously enter a hydrocracking reactor 2 for cracking reaction, macromolecular organic matters are cracked into micromolecular organic matters, and products after the reaction enter a high molecular tank 3 for gas-liquid phase separation;
the gas phase passes through a heat exchanger 7, high-concentration ammonia in an ammonia water tank 10 is injected into a reaction system by virtue of high-pressure water injection and a high-pressure pump 11, and then is cooled by an air cooler 8 to become cold liquid-phase oil and hydrogen;
hydrogen enters a circulating hydrogen buffer tank 6, is continuously compressed by a compressor 9 and then is mixed with high-sulfur raw oil to enter a refining reactor 1 again for reaction, cold liquid-phase oil enters a cold high-pressure separation tank 5 for oil-water separation, the separated oil enters a rectifying unit 14 to produce finished oil, water enters an acidic water stripping unit 12 to separate hydrogen sulfide and ammonia dissolved in the water, and the ammonia is collected by an ammonia recovery device 13;
the liquid phase separated from the high-pressure separation tank 3 enters the low-pressure separation tank 4 for flash evaporation and pressure reduction, and then the oil product is sent to a rectification unit 14 to produce the finished oil product.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (6)
1. The fuel oil hydrogenation ammonia injection cracking device is characterized by comprising the following structural units:
the system comprises a refining reactor (1), a hydrocracking reactor (2), a high-pressure separating tank (3), a low-pressure separating tank (4), a cold high-pressure separating tank (5), a circulating hydrogen buffer tank (6), a heat exchanger (7), an air cooler (8), a compressor (9), an ammonia water tank (10) and a high-pressure pump (11).
2. The fuel oil hydrogenation ammonia injection cracking device according to claim 1, wherein the refining reactor (1) is connected with the hydrocracking reactor (2), the other end of the hydrocracking reactor (2) is connected with the high-pressure separator (3), the upper end of the high-pressure separator (3) is connected with the heat exchanger (7), the heat exchanger (7) is connected with the air cooler (8), the air cooler (8) is connected with the cold high-pressure separator (5), the upper end of the cold high-pressure separator (5) is connected with the circulating hydrogen buffer tank (6), the lower end of the cold high-pressure separator (5) is connected with an acidic water unit (12), and the other end of the acidic water stripping unit (12) is connected with an ammonia gas recovery device (13).
3. The fuel oil hydrogenation ammonia injection cracking device according to claim 2, characterized in that the other end of the recycle hydrogen buffer tank (6) is connected with the compressor (9), and the compressor (9) is connected with the refining reactor (1) through a pipeline.
4. The fuel oil hydrogenation ammonia injection cracking device according to claim 2, characterized in that the lower end of the high-pressure separator (3) is connected with the low-pressure separator (4), the other end of the low-pressure separator (4) is connected with a rectification unit (14), and the rectification unit (14) is connected with the cold high-pressure separator (5) through a pipeline.
5. The fuel oil hydrorefining ammonia injection cracking unit according to claim 2, characterized in that an ammonia tank (10) is arranged between the heat exchanger (7) and the air cooler (8), and the ammonia tank (10) is connected with a high-pressure pump (11).
6. A fuel oil hydrogenation ammonia injection cracking process is characterized by comprising the following steps:
providing a fuel oil hydroammoniacal injection cracking unit as defined in any one of claims 1 to 5;
the heated high-sulfur raw oil is mixed with hydrogen and then enters a refining reactor (1) from the top to react to remove sulfur, nitrogen, aromatic hydrocarbon, olefin and oxygen in the raw oil, and a large amount of hydrogen sulfide can be generated in the process;
the reacted materials continuously enter a hydrocracking reactor (2) for cracking reaction, macromolecular organic matters are cracked into micromolecular organic matters, and products after the reaction enter a high molecular tank (3) for gas-liquid phase separation;
the gas phase passes through a heat exchanger (7), high-concentration ammonia in an ammonia water tank (10) is injected into a reaction system by means of high-pressure water injection and a high-pressure pump (11), and then is cooled by an air cooler (8) to become cold liquid-phase oil and hydrogen;
hydrogen enters a circulating hydrogen buffer tank (6), is continuously compressed by a compressor (9) and then is mixed with high-sulfur raw oil to enter a refining reactor (1) for reaction, cold liquid-phase oil enters a cold high-pressure separation tank (5) for oil-water separation, the separated oil enters a rectification unit (14) to produce finished oil, water enters an acidic water stripping unit (12) to separate hydrogen sulfide and ammonia dissolved in the water, and the ammonia is collected by an ammonia recovery device (13);
the liquid phase separated from the high-pressure separation tank (3) enters the low-pressure separation tank (4) for flash evaporation and pressure reduction, and then the oil product is sent to a rectification unit (14) to produce the finished oil product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011096117.6A CN112080321A (en) | 2020-10-14 | 2020-10-14 | Fuel oil hydrogenation ammonia injection cracking device and process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011096117.6A CN112080321A (en) | 2020-10-14 | 2020-10-14 | Fuel oil hydrogenation ammonia injection cracking device and process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112080321A true CN112080321A (en) | 2020-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011096117.6A Pending CN112080321A (en) | 2020-10-14 | 2020-10-14 | Fuel oil hydrogenation ammonia injection cracking device and process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112080321A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113845935A (en) * | 2021-11-22 | 2021-12-28 | 中化长和科技有限责任公司 | Be applied to liquid ammonia feed mechanism that hydrocracking was started to be worked |
| CN115750043A (en) * | 2022-11-04 | 2023-03-07 | 东风商用车有限公司 | Vehicle-mounted ammonia cracking hydrogen production system for ammonia fuel compression ignition internal combustion engine and control method |
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| CN103789022A (en) * | 2012-11-03 | 2014-05-14 | 中国石油化工股份有限公司 | Hydrogenation process |
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2020
- 2020-10-14 CN CN202011096117.6A patent/CN112080321A/en active Pending
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113845935A (en) * | 2021-11-22 | 2021-12-28 | 中化长和科技有限责任公司 | Be applied to liquid ammonia feed mechanism that hydrocracking was started to be worked |
| CN113845935B (en) * | 2021-11-22 | 2022-09-30 | 中化长和科技有限责任公司 | Be applied to liquid ammonia feed mechanism that hydrocracking was started to be worked |
| CN115750043A (en) * | 2022-11-04 | 2023-03-07 | 东风商用车有限公司 | Vehicle-mounted ammonia cracking hydrogen production system for ammonia fuel compression ignition internal combustion engine and control method |
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