CN212119467U - Oil gas recovery processing system of aromatic hydrocarbon tank field - Google Patents
Oil gas recovery processing system of aromatic hydrocarbon tank field Download PDFInfo
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- CN212119467U CN212119467U CN202020175194.XU CN202020175194U CN212119467U CN 212119467 U CN212119467 U CN 212119467U CN 202020175194 U CN202020175194 U CN 202020175194U CN 212119467 U CN212119467 U CN 212119467U
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Abstract
The utility model discloses an aromatic hydrocarbon tank field vapor recovery system processing system, include: the device comprises an aromatic hydrocarbon storage tank, a C4+ adsorption/desorption tower, a C4+ desorption gas condenser and a mixed aromatic hydrocarbon tank, wherein the aromatic hydrocarbon storage tank is used for storing oil gas in an aromatic hydrocarbon tank area, the C4+ adsorption/desorption tower is connected with the aromatic hydrocarbon storage tank and is used for condensing and adsorbing a C4+ product in the oil gas in the aromatic hydrocarbon tank area, the adsorbed liquid-phase C4+ product is desorbed and vaporized and then sent to the C4+ desorption gas condenser, the C4+ desorption gas condenser is connected with the C4+ adsorption/desorption tower and is used for condensing and liquefying the aromatic hydrocarbon oil gas vaporized by the C4+ adsorption/desorption tower to obtain a liquid aromatic hydrocarbon mixture and sending the liquid aromatic hydrocarbon mixture to the mixed aromatic hydrocarbon tank, and the mixed aromatic hydrocarbon tank is connected with the C4+ desorption gas condenser and is used. The aromatic hydrocarbon tank area oil gas recovery processing system has the beneficial effects of high aromatic hydrocarbon product adsorption efficiency, resource saving and environmental friendliness.
Description
Technical Field
The utility model relates to a chemical industry field especially relates to an aromatic hydrocarbon tank field vapor recovery system processing system.
Background
Generally, oil gas products generated in an aromatic hydrocarbon tank area in a petrochemical refinery comprise various oil products and aromatic hydrocarbon volatile matters, and in order to avoid environmental pollution caused by the aromatic hydrocarbon volatile matters, the traditional oil gas treatment process of the aromatic hydrocarbon tank area condenses and liquefies oil gas in the aromatic hydrocarbon tank area and then sends the condensed and liquefied oil gas into a biochemical pool for emission treatment. However, the oil gas in the aromatic hydrocarbon tank area usually contains a large amount of C4+ hydrocarbons, the C4+ hydrocarbons can be recycled, and the oil gas in the aromatic hydrocarbon tank area is directly sent to a biochemical pool for treatment, so that serious resource waste is caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an aromatic hydrocarbon tank field oil gas recovery processing system can retrieve the C4+ hydrocarbons in the aromatic hydrocarbon tank field oil gas, resources are saved, do benefit to the environmental protection.
To achieve the purpose, the utility model adopts the following technical proposal:
an aromatics tank field oil gas recovery processing system, comprising: the device comprises an aromatic hydrocarbon storage tank, a C4+ adsorption/desorption tower, a C4+ desorption gas condenser and a mixed aromatic hydrocarbon tank, wherein the aromatic hydrocarbon storage tank is used for storing oil gas in an aromatic hydrocarbon tank area, the C4+ adsorption/desorption tower is connected with the aromatic hydrocarbon storage tank and is used for condensing and adsorbing a C4+ product in the oil gas in the aromatic hydrocarbon tank area, desorbing and vaporizing the liquid-phase C4+ product obtained by adsorption and then sending the desorbed and vaporized product into the C4+ desorption gas condenser, the C4+ desorption gas condenser is connected with the C4+ adsorption/desorption tower and is used for condensing and liquefying the aromatic hydrocarbon oil gas obtained by vaporizing the C4+ adsorption/desorption tower to obtain a liquid aromatic hydrocarbon mixture and sending the liquid aromatic hydrocarbon mixture into the mixed aromatic hydrocarbon tank, and the mixed aromatic hydrocarbon tank and the C4 +.
In one embodiment, the C4+ adsorption/desorption tower is filled with carbon nano-adsorbent.
In one embodiment, the oil gas recovery processing system in the aromatic hydrocarbon tank area further includes a noncondensable gas processing device, and the noncondensable gas processing device is connected with the C4+ desorption gas condenser.
In one embodiment, the noncondensable gas treatment device is further connected to an aromatic hydrocarbon storage tank.
In one embodiment, the oil gas recovery processing system in the aromatic hydrocarbon tank field further comprises a pressure boosting device, and the pressure boosting device is arranged between the aromatic hydrocarbon storage tank and the C4+ adsorption/desorption tower.
In one embodiment, the non-condensable gas processing device is a carbonization device.
In one embodiment, the non-condensable gas processing device is an oxidation device.
In one embodiment, the number of C4+ adsorption/desorption columns is not less than two.
In one embodiment, the number of the noncondensable gas treatment devices is not less than two.
The oil gas recovery processing system of the aromatic hydrocarbon tank area comprises an aromatic hydrocarbon storage tank, a C4+ adsorption/desorption tower, a C4+ desorption gas condenser and a mixed aromatic hydrocarbon tank which are sequentially connected. The aromatic hydrocarbon storage tank is used for storing oil gas in the aromatic hydrocarbon tank area; the C4+ adsorption/desorption tower is connected with the aromatic hydrocarbon storage tank and is used for condensing and adsorbing a C4+ product in oil gas in the aromatic hydrocarbon tank area, desorbing and vaporizing a liquid phase C4+ product obtained by adsorption and sending the liquid phase C4+ product into a C4+ desorption gas condenser; the C4+ desorption gas condenser is connected with the C4+ adsorption/desorption tower and is used for condensing and liquefying the aromatic hydrocarbon oil gas obtained by vaporization of the C4+ adsorption/desorption tower to obtain a liquid aromatic hydrocarbon mixture and sending the liquid aromatic hydrocarbon mixture into the mixed aromatic hydrocarbon tank; the mixed aromatic hydrocarbon tank is connected with the condenser of the C4+ desorption gas, is used for storing the liquid aromatic hydrocarbon mixture and periodically sends the liquid aromatic hydrocarbon mixture to the separation tower to realize the recovery of C4+ hydrocarbons. The aromatic hydrocarbon tank field oil gas recovery processing system can completely adsorb and desorb C4+ hydrocarbons in the oil gas in the aromatic hydrocarbon tank field, thereby realizing the recovery of C4+ hydrocarbon substances, saving resources and being beneficial to environmental protection.
Drawings
FIG. 1 is a schematic diagram of a system for recovering and treating oil and gas in an aromatic hydrocarbon tank field in one embodiment.
Description of reference numerals:
the system comprises a 10-aromatic hydrocarbon storage tank, a 20-C4+ adsorption/desorption tower, a 30-C4+ desorption gas condenser, a 40-mixed aromatic hydrocarbon tank, a 50-oil gas preheater, a 60-noncondensable gas treatment device and a 70-supercharging device.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Referring to fig. 1, an embodiment of an aromatics tank field oil gas recovery processing system includes an aromatics storage tank 10, a C4+ adsorption/desorption tower 20, a C4+ desorption gas condenser 30, and a mixed aromatics tank 40. The aromatic hydrocarbon storage tank 10 is used for storing oil gas in an aromatic hydrocarbon tank field. The C4+ adsorption/desorption tower 20 is connected with the aromatic hydrocarbon storage tank 10 and is used for condensing and adsorbing C4+ products in oil gas in the aromatic hydrocarbon storage tank area, desorbing and vaporizing the liquid phase C4+ products obtained by adsorption and sending the liquid phase C4+ products into a C4+ desorption gas condenser 30. The C4+ desorption gas condenser 30 is connected with the C4+ adsorption/desorption tower 20 and is used for condensing and liquefying the aromatic hydrocarbon oil gas obtained by vaporizing the C4+ adsorption/desorption tower 20 to obtain a liquid aromatic hydrocarbon mixture and sending the liquid aromatic hydrocarbon mixture into the mixed aromatic hydrocarbon tank 40. The mixed aromatic hydrocarbon tank 40 is connected with the C4+ desorption gas condenser 30 and is used for storing the liquid aromatic hydrocarbon mixture and periodically sending the liquid aromatic hydrocarbon mixture to the separation tower to realize the recovery of C4+ hydrocarbons.
The aromatic hydrocarbon tank field oil gas recovery processing system can completely adsorb and desorb C4+ hydrocarbons in the oil gas in the aromatic hydrocarbon tank field, thereby realizing the recovery of C4+ hydrocarbon substances, saving resources and being beneficial to environmental protection.
In one embodiment, the C4+ adsorption/desorption tower 20 is filled with a carbon nano adsorbent, which has a good adsorption rate and desorption rate for C4+ hydrocarbons, the maximum liquid adsorption rate is 1.5 times of the adsorbent amount, the desorption rate at about 90-200 ℃ can reach 100%, the adsorption and desorption efficiency is high, complete adsorption and desorption of C4+ hydrocarbons can be realized, and the recovery rate of C4+ hydrocarbons can be increased.
In an embodiment, the system for recycling and processing oil and gas in an aromatic hydrocarbon tank area further includes a noncondensable gas processing device 60, the noncondensable gas processing device 60 is connected to the C4+ desorption gas condenser 30, and the noncondensable gas processing device 60 is used for performing harmless treatment or recycling treatment on the C4+ desorption gas (C4-C5 and other noncondensable substances).
In one embodiment, the noncondensable gas treatment device 60 is a carbonization device, and the carbonization device reuses the C2-C3 hydrocarbons and the C4+ desorption gas obtained by vaporizing the C2+ adsorption/desorption tower 50. Specifically, the carbonization device vaporizes C2+ adsorption/desorption tower 50 through an induced draft fan to obtain C2-C3 hydrocarbons and C4+ desorption gas, the C2-C3 hydrocarbon gases and the C4+ desorption gas are changed into carbon on a catalyst at the temperature of 500 plus materials and 800 ℃, methane and a small amount of hydrogen are generated, the methane and the small amount of hydrogen with certain temperature are cooled and then are merged into an outlet of the C2+ adsorption/desorption tower 50 to be discharged, the carbonized tail gas is cooled through indirect heat exchange and is directly discharged to the atmosphere, the carbon obtained through carbonization can be discharged from the non-condensable gas treatment device 60 to be recovered, and the recovered carbon can be used for manufacturing carbon nano-adsorbent.
In one embodiment, the noncondensable gas treatment device 60 is an oxidation device, and the oxidation device performs harmless treatment on the C2-C3 hydrocarbons and the C4+ desorption gas obtained by vaporizing the C2+ adsorption/desorption tower 50. Specifically, the oxidation device carries out catalytic oxidation on C2-C3 hydrocarbons and C4+ desorption gas obtained by vaporizing C2+ adsorption/desorption tower 50, and converts the C2-C3 hydrocarbons and the C4+ desorption gas into CO2And water discharge.
In one embodiment, the oil gas recovery processing system of the aromatic hydrocarbon tank field further comprises a pressure boosting device 70, and the pressure boosting device 70 is arranged between the aromatic hydrocarbon storage tank 10 and the C4+ adsorption/desorption tower 20. In this embodiment, a pressurizing device 70 is disposed between the aromatic hydrocarbon storage tank 10 and the C4+ adsorption/desorption tower 20, and the pressure of the oil gas in the aromatic hydrocarbon tank area is first pressurized to 0.001MPa-2.0MPa to adapt to the following adsorption and desorption processes. After the oil gas in the aromatic hydrocarbon tank area is pressurized, the gas speed can be slowed down, the adsorption time can be prolonged, and the adsorption rate can be improved. And, through carrying out pressurization processing to arene jar district oil gas, also can increase the operational flexibility of handling oil gas.
Specifically, considering that oil gas is mainly a mixture of nitrogen and hydrocarbon, the C4+ adsorption/desorption tower 20 adopts a high-efficiency cooling adsorption tower, which is provided with a jacket and a coil pipe in the tower, an adsorbent packing layer is filled in contact with the coil pipe, the C4+ adsorption/desorption tower 20 indirectly exchanges heat through a cooling medium (a cooling medium with the temperature of 5-10 ℃ is provided by a self-contained refrigeration device), the temperature in the cooling adsorption tower is kept at 10-15 ℃, so that C4+ hydrocarbons (namely C4-C10 hydrocarbons) are condensed on the carbon nano adsorbent, the cooling effect of the equipment is better as the liquid phase is increased, the equipment is quickly transited to a gas equilibrium composition at an operating temperature, the partial pressure of the C4+ hydrocarbons in the nitrogen is greatly reduced, after adsorption saturation, the jacket of the C4+ adsorption/desorption tower 20 and a heat exchange tube are filled with steam to heat the C4+ adsorption/desorption tower 20 to 100-200 ℃, and (3) distilling aromatic oil on the carbon nano adsorbent, sending the distilled aromatic oil gas into a C4+ desorption gas condenser 30, sending the aromatic oil gas into a mixed aromatic hydrocarbon tank 40 after passing through a C4+ desorption gas condenser 30, and periodically sending the aromatic oil gas into a separation tower for recovery. Further, in the process of condensing and liquefying the aromatic hydrocarbon oil gas in the C4+ desorption gas condenser 30, substances which are not easy to condense, such as C4-C5 hydrocarbons, form desorption gas, the desorption gas is discharged from the C4+ desorption gas condenser 30 and sent to the noncondensable gas treatment device 60 for carbonization treatment, and a small amount of residual desorption gas tail gas is directly discharged.
In one embodiment, the number of the C4+ adsorption/desorption columns 20 is not less than two in order to improve the adsorption/desorption efficiency of the C4+ hydrocarbons. As shown in fig. 1, in this embodiment, two C4+ adsorption/desorption towers 20 with the same function are provided, one C4+ adsorption/desorption tower 20 is switched to another C4+ adsorption/desorption tower 20 for adsorption after being saturated in adsorption, the C4+ adsorption/desorption tower 20 which is saturated in adsorption is switched to a desorption mode, and the switching operation of the two C4+ adsorption/desorption towers 20 can save the adsorption/desorption waiting time and improve the adsorption/desorption efficiency of C4+ hydrocarbons. The switching of the two C4+ adsorption/desorption towers 20 is based on that a certain liquid level appears on a tower bottom viewing mirror or a hydraulic pipe, and the content of C4 and C4+ total hydrocarbons in outlet gas is close to 80-85% of the highest value of qualified emission. The two C4+ adsorption/desorption columns 20 are switched between a cooling medium and a heating medium, and are controlled by a DCS (Distributed Control System) System. When the C4+ adsorption/desorption tower 20 adsorbs, the heating medium channel is closed, the cooling medium channel is opened, and the cooling medium is pumped in and circulated by the refrigerator, so that the C4+ adsorption/desorption tower 20 is cooled. In the process, residual heat medium in the heating coil is automatically cooled, the volume is shrunk, and the safe operation can be realized. During desorption, the heating medium channel is opened, and the cooling medium channel is gradually closed. In this process, as the C4+ adsorption/desorption column 20 is heated, the medium in the cooling coil is also heated, corresponding to a certain partial pressure. Therefore, the cooling medium valve cannot be completely closed to ensure that the pressure of the cooling medium in the coil pipe does not rise, and part of vaporized cooling medium enters the refrigerator and then is naturally cooled, so that the refrigerator can be safely operated. In this embodiment, two C4+ adsorption/desorption towers 20 are provided, and in other embodiments, the number of C4+ adsorption/desorption towers 20 may be more than two according to the actual process requirement, and this embodiment is not particularly limited.
In one embodiment, the number of the noncondensable gas treatment devices 60 may be not less than two to improve the carbonization or oxidation efficiency. As shown in fig. 1, in the present embodiment, the number of the noncondensable gas treatment devices 60 is two. The two noncondensable gas treatment devices 60 may be both carbonization devices or both oxidation devices, and when the pressure drop of one of the noncondensable gas treatment devices 60 becomes large, switching is performed to improve the treatment efficiency of the noncondensable gas. Specifically, the noncondensable gas treatment device 60 has a small size, and is switched by directly replacing after cutting. Of course, in other embodiments, one of the two non-condensable gas treatment devices 60 may be an oxidation device, and the other may be a carbonization device, and the oxidation device and the carbonization device may be switched to operate alternately according to specific process requirements to perform harmless treatment or reuse treatment on the non-condensable gas. Further, the number of the noncondensable gas treatment devices 60 may be more than two according to the actual process requirement, and the above embodiment is not particularly limited.
The working process of the oil gas recovery processing system in the aromatic hydrocarbon tank field is specifically described with reference to fig. 1 as follows: firstly, the oil gas in the aromatic hydrocarbon tank area stored in the aromatic hydrocarbon storage tank 10 is pressurized by a pressurizing device 70 and then enters one C4+ adsorption/desorption tower 20, after the C4+ adsorption/desorption tower 20 is saturated by adsorption, the other C4+ adsorption/desorption tower 20 is switched to adsorb, meanwhile, the aromatic hydrocarbon oil in the C4+ adsorption/desorption tower 20 which is saturated by adsorption is evaporated, the evaporated aromatic hydrocarbon oil gas is sent to a C4+ desorption gas condenser 30, the aromatic hydrocarbon oil gas is condensed and liquefied by the C4+ desorption gas condenser 30 and then enters a mixed aromatic hydrocarbon tank 40 and is periodically sent to a separation tower to be recovered, and the desorbed gas is sent to a noncondensable gas treatment device 60 from the C4+ desorption gas condenser 30 to be subjected to innocent treatment or reutilization treatment.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (8)
1. The utility model provides an aromatic hydrocarbon tank field oil gas recovery processing system which characterized in that includes: an aromatic hydrocarbon storage tank (10), a C4+ adsorption/desorption tower (20), a C4+ desorption gas condenser (30) and a mixed aromatic hydrocarbon tank (40), wherein the aromatic hydrocarbon storage tank (10) is used for storing oil gas in an aromatic hydrocarbon tank area, the C4+ adsorption/desorption tower (20) is connected with the aromatic hydrocarbon storage tank (10) and is used for condensing and adsorbing C4+ products in the oil gas in the aromatic hydrocarbon tank area and sending the liquid-phase C4+ products obtained by adsorption into the C4+ desorption gas condenser (30) after desorption and vaporization, the C4+ desorption gas condenser (30) is connected with the C4+ adsorption/desorption tower (20) and is used for condensing and liquefying the aromatic hydrocarbon obtained by vaporization of the C4+ adsorption/desorption tower (20) to obtain a liquid aromatic hydrocarbon mixture which is sent into the mixed aromatic hydrocarbon tank (40), and the mixed aromatic hydrocarbon tank (40) is connected with the C4+ gas condenser (30), for storing liquid aromatic hydrocarbon mixtures.
2. The aromatics drum field hydrocarbon recovery processing system of claim 1, wherein the C4+ adsorption/desorption column (20) is packed with a carbon nano-adsorbent.
3. The aromatics tank field hydrocarbon recovery processing system of claim 1, further comprising a non-condensable gas processing device (60), the non-condensable gas processing device (60) being connected to the C4+ desorption gas condenser (30).
4. The aromatics drum farm oil and gas recovery processing system of claim 1, further comprising a pressure boosting device (70), the pressure boosting device (70) disposed between the aromatics storage tank (10) and the C4+ adsorption/desorption column (20).
5. The aromatics tank field hydrocarbon recovery processing system of claim 3, wherein the non-condensable gas processing apparatus (60) is a carbonization apparatus.
6. The aromatics drum field hydrocarbon recovery processing system of claim 3, wherein the non-condensable gas processing apparatus (60) is an oxidizer.
7. The aromatics drum field hydrocarbon recovery processing system of any one of claims 1-6, characterized in that the number of C4+ adsorption/desorption columns (20) is not less than two.
8. The aromatics drum field hydrocarbon recovery processing system of claim 3 or claim 5 or claim 6, wherein the number of non-condensable gas processing units (60) is not less than two.
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| CN202020175194.XU CN212119467U (en) | 2020-02-17 | 2020-02-17 | Oil gas recovery processing system of aromatic hydrocarbon tank field |
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| CN202020175194.XU CN212119467U (en) | 2020-02-17 | 2020-02-17 | Oil gas recovery processing system of aromatic hydrocarbon tank field |
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