CN212335073U - Alkylation device - Google Patents
Alkylation device Download PDFInfo
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- CN212335073U CN212335073U CN202020684919.8U CN202020684919U CN212335073U CN 212335073 U CN212335073 U CN 212335073U CN 202020684919 U CN202020684919 U CN 202020684919U CN 212335073 U CN212335073 U CN 212335073U
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- acid
- tank
- settling tank
- alkylation
- acid settling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The utility model relates to an alkylation device, which relates to the technical field of petrochemical industry, a raw material coalescer, an alkylation reactor, a flash tank, an acid settling tank and a compressor, wherein the input end of the alkylation reactor is provided with an isobutane input pipe, a washing liquid input pipe and a circulating acid pipe, the acid settling tank is a grading assembly device and is provided with a first-stage acid settling tank and a second-stage acid settling tank, an electromagnetic three-way valve is arranged between the first-stage acid settling tank and the second-stage acid settling tank, a conveying pipe and a hydrocarbon phase processing unit are connected with an acid discharge tank, raw materials are sent to the alkylation reactor after being preliminarily dehydrated by the raw material coalescer, acid-hydrocarbon emulsion completely reacted enters the acid settling tank to carry out acid and hydrocarbon settlement separation by rising, the electromagnetic three-way valve is adjusted to be closed according to requirements, then whether the first-stage acid settling tank and the second-stage acid settling tank are operated or not is controlled, the acid discharge tank is arranged, the acid emulsion processing capacity is stronger, and more energy is saved.
Description
Technical Field
The utility model belongs to the technical field of petrochemical technology and specifically relates to an alkylation unit is related to.
Background
In 2018, day 29, 12 and 29, seven components of committee such as committee for reform and the like are jointly issued: in 2019, 1 month and 1 day, the gasoline for vehicles (containing E10 ethanol gasoline) and the diesel oil for vehicles (containing B5 biodiesel) meeting the mandatory national standard VIA of the sixth stage are supplied nationwide, and the gasoline for vehicles (containing E10 ethanol gasoline) and the diesel oil for vehicles (containing B5 biodiesel) which are lower than the national VIA standard are stopped to be sold domestically. Aromatization, as the name suggests, C4 produces aromatic hydrocarbon (benzene, toluene, xylene and other aromatic hydrocarbon oils) in the presence of catalyst under certain conditions, and can be used as a blending agent for high octane gasoline. The alkyl group is preferably an oil hydrocarbon, i.e., a saturated hydrocarbon, i.e., C4 produces paraffinic oils of larger molecular chains, such as C6, C7, C8 alkanes. Can be directly used as gasoline.
The existing petrochemical enterprises are generally continuous aromatization devices, the process flow is generally divided into a reaction part, a regeneration part, an absorption stabilization part, a fractionation part and an auxiliary system, the aromatization devices are built into a device which is early in production, low in yield and high in energy consumption, so that the production cost of products is higher, and the aromatization devices cannot be continuously operated due to the influence of market factors such as large drop of oil price and the like. And enormous pressure is generated for the operation of enterprises. With the upgrading of oil products, the survival of aromatization products is hardly possible. Many aromatization units have short actual operating times and, although the equipment is well-defined, do not perform their benefits. Therefore, in order to reverse the very difficult current situation, according to the national transformation upgrading policy and the continuously upgraded oil quality index, the device can play a larger role and benefit, partial equipment of the aromatization device can be utilized, the continuous aromatization device is transformed into an alkylation device which is imperative, the transformation is carried out on the basis of the original aromatization device, an alkylation reaction system is used for replacing an aromatization reaction system, the product separation rectification, the compressor refrigeration and the public engineering all utilize the original equipment, and the general alkylation device comprises a depropanization part, a reaction compression part, an effluent treatment part, a fractionation part and an auxiliary system.
Although the quality of gasoline from the alkylation device is good, the size of the produced acid emulsion is different in the production process of the device along with the difference of the productivity of the device, the treatment of the acid emulsion is more troublesome, and the energy consumption is higher.
SUMMERY OF THE UTILITY MODEL
To the not enough that prior art exists, one of the purposes of the utility model is to provide an alkylation unit, can adjust sour emulsion throughput at any time according to the production plan, it is more energy-conserving.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: the utility model provides an alkylation unit, includes raw materials coalescer, alkylation reactor, flash tank, acid settling tank, compressor, the alkylation reactor input with the raw materials coalescer is connected, the alkylation reactor input is equipped with isobutane input tube, lotion input tube, circulation acid pipe, the acid settling tank is equipped with one-level acid settling tank and second grade acid settling tank for hierarchical equipment, be equipped with the electromagnetism three-way valve between one-level acid settling tank and second grade acid settling tank, the electromagnetism three-way valve be responsible for with be equipped with the conveyer pipe between the alkylation reactor, one-level acid settling tank and second grade acid settling tank upper end are equipped with hydrocarbon phase processing unit, be connected with the acid discharge tank on one-level acid settling tank and the second grade acid settling tank.
By adopting the technical scheme, the raw materials are preliminarily dehydrated by the raw material coalescer and then are sent to the alkylation reactor, various raw materials are sent to the alkylation reactor for reaction, olefin and isobutane react under the action of a catalyst, the circulating isobutane and olefin are premixed and then enter the alkylation reactor, the mixture is stirred and circulated among tube bundles, the olefin and the isobutane generate isooctane under the existence of a sulfuric acid catalyst, acid-hydrocarbon emulsion which is completely reacted rises to enter an acid settling tank for settling separation of acid and hydrocarbon, an electromagnetic three-way valve is arranged, the opening and closing of the electromagnetic three-way valve can be adjusted according to requirements, and then whether a primary acid settling tank and a secondary acid settling tank are operated or not is controlled, an acid discharge tank is arranged to conveniently receive waste acid generated by the primary acid settling tank and the secondary acid settling tank, the whole primary acid settling tank and the secondary acid settling tank can be adjusted to be opened or not according to the production progress, and the capacity of treating acid emulsion is, the energy is saved.
The present invention may be further configured in a preferred embodiment as: the hydrocarbon phase processing unit comprises hydrocarbon phase pressure control valves arranged on the primary acid settling tank and the secondary acid settling tank, an output pipe is arranged on the hydrocarbon phase pressure control valve, and the output pipe is connected with the flash tank.
By adopting the technical scheme, the hydrocarbon phase pressure control valve is arranged, the hydrocarbon phase separated from the acid settling tank is depressurized by the hydrocarbon phase pressure control valve and is conveyed into the flash tank for treatment through the output pipe, and gas-liquid separation is conveniently carried out.
The present invention may be further configured in a preferred embodiment as: and a heat taking tube bundle is arranged in the alkylation reactor, the output tube extends into the alkylation reactor and is attached to the heat taking tube bundle, and the tail end of the output tube extends out of the alkylation reactor and is connected with the flash tank.
By adopting the technical scheme, after the pressure of the hydrocarbon phase is reduced by the pressure control valve, the hydrocarbon phase flows through the heat taking tube bundle in the reactor to be partially vaporized, the absorbed heat takes away the reaction heat, and the vapor-liquid mixture output tube is conveyed into the flash tank for treatment, so that on one hand, the absorbed reaction heat can be fully utilized, on the other hand, the vapor-liquid mixture is conveniently formed and is convenient to treat.
The present invention may be further configured in a preferred embodiment as: the acid discharge tank is also provided with a waste acid delivery pump connected with a pipeline between the flash tanks.
Through adopting above-mentioned technical scheme, the flash tank sets up the spent acid delivery pump of tube coupling, can conveniently arrange the acid tank and receive the acidizing fluid from the flash tank, avoids because of getting the damage of heat pipe bundle, leads to a large amount of acidizing fluids to get into the flash tank and can't in time discharge away, takes place danger, has promoted the security of device.
The present invention may be further configured in a preferred embodiment as: the acid discharge tank is provided with an acid air pump, and the acid air pump is connected with an effluent alkaline washing tank through a pipeline.
By adopting the technical scheme, the acid air pump is arranged, so that acid oil gas in the acid discharge tank can be discharged into the effluent alkaline washing tank for neutralization, and the acid oil gas can be conveniently treated.
The present invention may be further configured in a preferred embodiment as: and an acid liquid level meter is arranged on the flash tank.
By adopting the technical scheme, the acid liquid level meter is arranged to facilitate observation of the acid hydrocarbon interface in the flash tank.
The present invention may be further configured in a preferred embodiment as: and a concentrated acid storage tank is arranged on one side of the primary acid settling tank, and a nitrogen pipe is introduced into the top end of the concentrated acid storage tank.
Through adopting above-mentioned technical scheme, set up the concentrated acid storage tank and be used for receiving the fresh sulphuric acid of purchasing, set up the nitrogen gas pipe simultaneously, cover with nitrogen gas in the concentrated acid storage tank, prevent that the moisture in the air from getting into and causing sour dilution and the equipment corrosion in the concentrated acid storage tank.
The present invention may be further configured in a preferred embodiment as: the electromagnetic three-way valve is provided with a flowmeter on a main pipe, and is additionally provided with a central controller for controlling the primary acid settling tank, the secondary acid settling tank and the electromagnetic three-way valve to be opened and closed, wherein the flowmeter is connected with the central controller.
Through adopting above-mentioned technical scheme, set up the flow that flowmeter detectable electromagnetism three-way valve was responsible for, make things convenient for central controller to control the switching of one-level acid settling cask and second grade acid settling cask and electromagnetism three-way valve according to the flow size.
To sum up, the utility model discloses a following at least one useful technological effect:
1. the raw materials are preliminarily dehydrated by a raw material coalescer and then are sent to an alkylation reactor, various raw materials are sent to the alkylation reactor for reaction, olefin and isobutane react under the action of a catalyst, the circulating isobutane and the olefin are premixed and then enter the alkylation reactor, the mixture is stirred and circulated among tube bundles, the olefin and the isobutane generate isooctane under the existence of a sulfuric acid catalyst, acid-hydrocarbon emulsion which is completely reacted rises to enter an acid settling tank for settling separation of acid and hydrocarbon, an electromagnetic three-way valve is arranged, the opening and closing of the electromagnetic three-way valve can be adjusted according to requirements, then whether a primary acid settling tank and a secondary acid settling tank are operated or not is controlled, an acid discharge tank is arranged to conveniently receive waste acid generated by the primary acid settling tank and the secondary acid settling tank, the whole primary acid settling tank and the secondary acid settling tank can be adjusted to be opened or not according to the production schedule, and the capacity of treating acid emulsion is, the energy is saved;
2. the flash tank is provided with the waste acid delivery pump connected with the pipeline, so that the acid discharge tank can conveniently receive acid liquor from the flash tank, the phenomenon that a large amount of acid liquor enters the flash tank and cannot be discharged in time due to the damage of the heat taking pipe bundle is avoided, danger is caused, and the safety of the device is improved;
3. after the pressure of the hydrocarbon phase is reduced by the pressure control valve, the hydrocarbon phase flows through the heat extraction tube bundle in the reactor to be partially vaporized, the absorbed heat takes away the reaction heat, and the vapor-liquid mixture output tube is conveyed into the flash tank for treatment, so that the absorbed reaction heat can be fully utilized, and the vapor-liquid mixture is conveniently formed and is convenient to treat.
Drawings
Fig. 1 is a schematic view of the present invention.
In the figure, 1, a raw material coalescer; 2. an alkylation reactor; 3. a flash tank; 4. an acid settling tank; 5. an isobutane inlet pipe; 6. a wash liquor input tube; 7. a primary acid settling tank; 8. a secondary acid settling tank; 9. an electromagnetic three-way valve; 10. a delivery pipe; 11. a hydrocarbon phase treatment unit; 12. an acid discharge tank; 13. a hydrocarbon phase pressure control valve; 14. an output pipe; 15. taking a heat pipe bundle; 16. a flow meter; 17. a concentrated acid storage tank; 18. a nitrogen gas pipe; 19. a waste acid delivery pump; 20. an acid liquor level gauge; 21. an effluent alkaline washing tank; 22. a circulating acid pipe; 23. an acid air pump.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, for the alkylation device disclosed by the present invention, comprising a raw material coalescer 1, an alkylation reactor 2, a flash tank 3, an acid settling tank 4, and a compressor (not shown in the figure), wherein the alkylation reactor 2 is of an agitated structure, the input end of the alkylation reactor 2 is connected with the raw material coalescer 1, the input end of the alkylation reactor 2 is provided with an isobutane input pipe 5, a washing liquid input pipe 6, and a circulating acid pipe 22, the other end of the circulating acid pipe 22 is communicated with the acid settling tank 4, the acid settling tank 4 is a grading assembly device, and is provided with a primary acid settling tank 7 and a secondary acid settling tank 8, an electromagnetic three-way valve 9 is arranged between the primary acid settling tank 7 and the secondary acid settling tank 8, a delivery pipe 10 is arranged between the main pipe of the electromagnetic three-way valve 9 and the alkylation reactor 2, and a hydrocarbon phase processing unit 11 is arranged at the upper ends of the primary, the primary acid settling tank 7 and the secondary acid settling tank 8 are connected with an acid discharge tank 12. Wherein the primary acid settling tank 7 and the secondary acid settling tank 8 are communicated with a circulating acid pipe 22.
Therefore, the raw materials are primarily dehydrated by the raw material coalescer 1 and then sent to the alkylation reactor 2, various raw materials are sent to the alkylation reactor 2 for reaction, olefin and isobutane react under the action of a catalyst, circulating isobutane and olefin are premixed and then enter the alkylation reactor 2, the mixture is stirred and circulated among tube bundles, the olefin and the isobutane generate isooctane under the existence of a sulfuric acid catalyst, acid-hydrocarbon emulsion which is completely reacted rises to enter the acid settling tank 4 for settling separation of acid and hydrocarbon, separated acid liquid returns to the reactor along the circulating acid pipe 22 for reuse, 90 percent of waste acid is settled and discharged to the acid discharge tank 12, the electromagnetic three-way valve 9 is arranged, the opening and closing of the electromagnetic three-way valve 9 can be adjusted according to requirements, and then whether the primary acid settling tank 7 and the secondary acid settling tank 8 operate or not is controlled, the acid discharge tank 12 is arranged to conveniently receive waste acid generated by the primary acid settling tank 7 and the secondary acid settling tank 8, the whole primary acid settling tank 7 and the whole secondary acid settling tank 8 can be adjusted to be opened or not according to the production progress, and the acid emulsified liquid treatment capacity is high.
Referring to fig. 1, the hydrocarbon phase treatment unit 11 includes a hydrocarbon phase pressure control valve 13 disposed on the primary acid settling tank 7 and the secondary acid settling tank 8, an output pipe 14 is disposed on the hydrocarbon phase pressure control valve 13, a heat extraction pipe bundle 15 is disposed in the alkylation reactor 2, the output pipe 14 extends into the alkylation reactor 2 and is attached to the heat extraction pipe bundle 15, the tail end of the output pipe 14 extends from the alkylation reactor 2 and is connected to the flash tank 3, and the flash tank 3 is a horizontal vessel having a middle partition and a common separation space. One side of the clapboard is used for the gas-liquid separation of the reaction distillate, and the other side is used for the gas-liquid separation of the circulating refrigerant. After the pressure of the hydrocarbon phase is reduced by the pressure control valve, the hydrocarbon phase partially vaporizes by flowing through a heat taking tube bundle 15 in the reactor, the absorbed heat takes away the reaction heat, and a vapor-liquid mixture output tube 14 is conveyed into a flash tank 3 for treatment, so that the absorbed reaction heat can be fully utilized, the vapor-liquid mixture is conveniently formed, and the liquid butane in the reaction effluent is utilized to carry out pressure reduction flash evaporation in a cooling tube bundle of an alkylation reactor 2, so that the heat released by the alkylation reaction is absorbed.
Referring to fig. 1, a flowmeter 16 is arranged on a main pipe of the electromagnetic three-way valve 9, a central controller for controlling the opening and closing of the primary acid settling tank 7, the secondary acid settling tank 8 and the electromagnetic three-way valve 9 is additionally arranged, the flowmeter 16 is connected with the central controller, the flowmeter 16 can detect the flow of the main pipe of the electromagnetic three-way valve 9, and the central controller can conveniently control the opening and closing of the primary acid settling tank 7, the secondary acid settling tank 8 and the electromagnetic three-way valve 9 according to the flow.
Referring to fig. 1, a concentrated acid storage tank 17 is arranged on one side of the primary acid settling tank 7, a nitrogen pipe 18 is introduced into the top end of the concentrated acid storage tank 17, the concentrated acid storage tank 17 is used for receiving purchased fresh sulfuric acid, and the nitrogen pipe 18 is arranged at the same time, so that the concentrated acid storage tank 17 is covered by nitrogen to prevent moisture in the air from entering the concentrated acid storage tank 17 to dilute the acid and corrode equipment.
Referring to fig. 1, in order to enhance the safety of the device, a waste acid delivery pump 19 connected with a pipeline is further arranged between the acid discharge tank 12 and the flash tank 3, so that redundant acid liquid is conveniently pumped into the acid discharge tank 12 after the heat taking pipe bundle 15 is corroded, an acid air pump 23 is arranged at the top end of the acid discharge tank 12, the acid air pump 23 is connected with an effluent alkaline washing tank 21 through a pipeline, and acid oil gas in the acid discharge tank 12 can be discharged into the effluent alkaline washing tank 21 by the acid air pump for neutralization, so that the oil gas is conveniently treated to contain acid. Further, an acid liquid level gauge 20 is arranged on the flash tank 3, so that an acid hydrocarbon interface in the flash tank 3 can be observed conveniently.
The device can be modified from a continuous aromatic production line, is carried out on the basis of the original aromatization device, an alkylation reaction system is used for replacing the aromatization reaction system, alkylation modification is completed by adding equipment such as an alkylation reactor 2, an acid settling tank 4, a flash tank 3, a concentrated acid storage tank 17, an acid discharge tank 12 and the like, and the original aromatization device equipment is completely utilized for product separation rectification, compressor refrigeration and public works. Through upgrading and transformation, the quality of the finished oil is improved, the operating rate of the device is improved, the yield of the device target product is greatly improved, the market competitiveness and the economic benefit are improved, the production cost is saved, and the new industrial standard of adaptability is realized.
The implementation principle of the embodiment is as follows: the raw materials are primarily dehydrated by a raw material coalescer 1 and then are sent to an alkylation reactor 2, various raw materials are sent to the alkylation reactor 2 for reaction, olefin and isobutane react under the action of a catalyst, circulating isobutane and olefin are premixed and then enter the alkylation reactor 2, the mixture is stirred and circulated among tube bundles, the olefin and the isobutane generate isooctane under the existence of a sulfuric acid catalyst, acid-hydrocarbon emulsion which is completely reacted rises to enter an acid settling tank 4 for settling separation of acid and hydrocarbon, an electromagnetic three-way valve 9 is arranged, the opening and closing of the electromagnetic three-way valve 9 can be adjusted according to requirements, then whether a primary acid settling tank 7 and a secondary acid settling tank 8 are operated or not is controlled, an acid discharge tank 12 is arranged to conveniently receive waste acid generated by the primary acid settling tank 7 and the secondary acid settling tank 8, and whether the whole primary acid settling tank 7 and the secondary acid settling tank 8 are opened or not can be adjusted according to the production progress, the acid emulsion processing capacity is stronger, and more energy is saved.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides an alkylation unit, includes raw materials coalescer (1), alkylation reactor (2), flash tank (3), acid settling tank (4), compressor, alkylation reactor (2) input with raw materials coalescer (1) is connected, alkylation reactor (2) input is equipped with isobutane input tube (5), lotion input tube (6), circulation acid pipe, its characterized in that: acid settling cask (4) are equipped for hierarchical equipment, are equipped with one-level acid settling cask (7) and second grade acid settling cask (8), be equipped with electromagnetic three-way valve (9) between one-level acid settling cask (7) and second grade acid settling cask (8), electromagnetic three-way valve (9) be responsible for with be equipped with conveyer pipe (10) between alkylation reactor (2), one-level acid settling cask (7) and second grade acid settling cask (8) upper end are equipped with hydrocarbon phase processing unit (11), be connected with acid discharge tank (12) on one-level acid settling cask (7) and second grade acid settling cask (8).
2. An alkylation unit according to claim 1, wherein: the hydrocarbon phase processing unit (11) comprises a hydrocarbon phase pressure control valve (13) arranged on the primary acid settling tank (7) and the secondary acid settling tank (8), an output pipe (14) is arranged on the hydrocarbon phase pressure control valve (13), and the output pipe (14) is connected with the flash tank (3).
3. An alkylation unit according to claim 2, wherein: the device is characterized in that a heat taking pipe bundle (15) is arranged in the alkylation reactor (2), the output pipe (14) extends into the alkylation reactor (2) and is attached to the heat taking pipe bundle (15), and the tail end of the output pipe (14) extends out of the alkylation reactor (2) and is connected with the flash tank (3).
4. An alkylation unit according to claim 3, wherein: the acid discharge tank (12) is also provided with a waste acid delivery pump (19) connected with a pipeline between the flash tank (3).
5. An alkylation unit according to claim 4, wherein: the acid discharge tank (12) is provided with an acid air pump (23), and the acid air pump (23) is connected with an effluent alkaline washing tank (21) through a pipeline.
6. An alkylation unit according to claim 5, wherein: and an acid liquid level meter (20) is arranged on the flash tank (3).
7. An alkylation unit according to claim 4, wherein: and a concentrated acid storage tank (17) is arranged on one side of the primary acid settling tank (7), and a nitrogen pipe (18) is introduced into the top end of the concentrated acid storage tank (17).
8. An alkylation unit according to claim 1, wherein: the electromagnetic three-way valve (9) is provided with a flowmeter (16) on a main pipe, and is additionally provided with a central controller for controlling the opening and closing of the primary acid settling tank (7), the secondary acid settling tank (8) and the electromagnetic three-way valve (9), and the flowmeter (16) is connected with the central controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020684919.8U CN212335073U (en) | 2020-04-28 | 2020-04-28 | Alkylation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020684919.8U CN212335073U (en) | 2020-04-28 | 2020-04-28 | Alkylation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212335073U true CN212335073U (en) | 2021-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020684919.8U Expired - Fee Related CN212335073U (en) | 2020-04-28 | 2020-04-28 | Alkylation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212335073U (en) |
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2020
- 2020-04-28 CN CN202020684919.8U patent/CN212335073U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210112 |
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| CF01 | Termination of patent right due to non-payment of annual fee |