CN220345778U - Low inert circulation and low energy consumption alkylation feeding device - Google Patents
Low inert circulation and low energy consumption alkylation feeding device Download PDFInfo
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- CN220345778U CN220345778U CN202321875528.4U CN202321875528U CN220345778U CN 220345778 U CN220345778 U CN 220345778U CN 202321875528 U CN202321875528 U CN 202321875528U CN 220345778 U CN220345778 U CN 220345778U
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- alkylation
- isobutane
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- storage tank
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- 238000005804 alkylation reaction Methods 0.000 title claims abstract description 65
- 230000029936 alkylation Effects 0.000 title claims abstract description 59
- 230000004087 circulation Effects 0.000 title claims abstract description 24
- 238000005265 energy consumption Methods 0.000 title claims abstract description 14
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 claims abstract description 96
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000001282 iso-butane Substances 0.000 claims abstract description 48
- 239000002994 raw material Substances 0.000 claims abstract description 34
- 238000003860 storage Methods 0.000 claims abstract description 31
- 238000005406 washing Methods 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 26
- 239000001294 propane Substances 0.000 claims abstract description 24
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 16
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003513 alkali Substances 0.000 claims abstract description 9
- 238000000746 purification Methods 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 239000003518 caustics Substances 0.000 claims 1
- 239000003915 liquefied petroleum gas Substances 0.000 abstract description 21
- 239000000463 material Substances 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 description 13
- 239000000047 product Substances 0.000 description 11
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 5
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 5
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007086 side reaction Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 150000003568 thioethers Chemical class 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The application discloses low inert circulation volume, low energy consumption alkylation feed arrangement includes: an after-ether C4 storage tank, a heavy C4 storage tank, a saturated LPG storage tank, a raw material purification system, an alkylation reactor, a depropanization system, an alkaline water washing system, a n-butane removal system and an isobutane circulation assembly; the post-ether C4 storage tank is communicated with a raw material purifying system pipeline; the produced materials of the alkylation reactor are connected with an alkaline water washing system through a pipeline; the alkali water washing system is communicated with the depropanization system pipeline. The method is characterized in that a saturated LPG (liquefied petroleum gas) storage tank is connected with a depropanizer and a deisobutanizer component pipeline in series, inert components propane and n-butane in one of the saturated LPG which enter the reactor raw materials are removed, isobutane contained in the saturated LPG is accurately fed into circulating isobutane of an alkylation reactor, so that the circulating amount of the inert components in an alkylation reaction system and a rectification system is reduced, the size of key equipment of the alkylation device is reduced, the purchase cost of the equipment is reduced, and the steam, circulating water and electric consumption of products are reduced.
Description
Technical Field
The application relates to the technical field of petrochemical industry, in particular to an alkylation feeding device with low inert circulation and low energy consumption.
Background
At present, the raw materials required by an alkylation production device are butene and isobutane, and the main sources of the butene and the isobutane are heavy C of a petrochemical device 4 Post-ether C 4 And saturated LPG, the saturated liquefied gas is mainly used for supplementing isobutane for alkylation reaction, and the existing alkylation production devices are all heavy C 4 Post-ether C 4 And the saturated LPG is directly fed into an alkylation reactor after being stored in a mixed mode, but the feeding process of the reaction system has the following problems:
1. in the prior device, a plurality of circulations are adopted, including acid circulation, hydrocarbon circulation and isobutane circulation, so as to ensure that the butene in the raw material is fully and completely reacted with less side reaction when excessive isobutane reacts with quantitative butene under the catalysis of concentrated sulfuric acid. The inert components (n-butane and propane) in the saturated LPG raw material are more than 76%, and directly enter the reactor, the isobutane is diluted when the content of the inert components (n-butane and propane) is increased in the reaction system, the concentration of the isobutane is reduced, the contact probability of the isobutane and the butene is disturbed by a packing layer of the reactor, and the occurrence probability of side reaction is increased; in order to prevent side reactions and ensure the quality of reaction products, the flow rate of circulating isobutane needs to be increased by several times in a reaction device. According to the material balance data and the equipment design capacity matching analysis and measurement, the content of inert components entering the reactor is increased by 1%, and the circulation isobutane flow is correspondingly increased by 10%, so that the invalid materials of the reaction system and the rectification system have large circulation amount, large equipment specification and high steam and electricity consumption.
2. The low-temperature alkylation device is characterized in that part of isobutane and propane in the reactor are vaporized to take away reaction heat, gas-phase isobutane and propane are circulated back to the reactor after being boosted and cooled by a compressor, the content of propane in the feed is increased to directly increase the amount of inert components at the inlet of the compressor, so that the running load and specification of the compressor are increased, the power consumption of the compressor is increased, and the investment of the compressor and an outlet cooler is increased.
3. In order to control the accumulation of propane in the alkylation reaction system, the reaction system extracts a stream of material to the depropanizer and the subsequent rectification system, and the rectification system generates corrosion problem due to high sulfide content in the extracted material, so that the safe operation of the device is affected.
Disclosure of Invention
The application provides a low inert circulation volume, low energy consumption alkylation feed arrangement to above-mentioned technical problem, realizes the accurate ratio feeding of raw materials through the device, can supply sufficient isobutane to advance reaction system, does not bring too much inert component again simultaneously to reduce device investment and system energy consumption, eliminate the system sulphide corrosion problem.
The low inert recycle and low energy alkylation feed apparatus provided herein includes: comprising the following steps: an after-ether C4 storage tank, a heavy C4 storage tank, a saturated LPG storage tank, a raw material purification system, an alkylation reactor, a depropanization system, an alkaline water washing system, a n-butane removal system and an isobutane circulation assembly; the saturated LPG storage tank is communicated with the depropanization system and the isobutane circulating assembly in series; the alkylation reactor, the alkaline water washing system, the depropanization system and the isobutane circulating assembly are communicated through pipelines; the alkylation reactor and the isobutane circulating assembly are communicated through a pipeline; the post-ether C4 storage tank and the raw material purifying system are communicated with an alkylation reactor pipeline in series; the heavy C4 storage tank is in pipeline communication with the alkylation reactor.
The isobutane recycling assembly comprises: a deisobutanizer, an isobutane circulating pump, and a raw material/isobutane mixer; the bottom discharge port of the depropanizer is communicated with the feed port pipeline of the deisobutanizer; the isobutane discharged from the top of the deisobutanizer enters a mixer together with the raw materials from a raw material purifying system by using an isobutane circulating pump, and the outlet of the mixer is communicated with an alkylation reactor.
Preferably, the saturated LPG tank, the depropanizer system, and the isobutane recycle assembly are in series communication with the alkylation reactor conduit.
Preferably, the produced materials of the alkylation reactor are communicated with an alkaline water washing system pipeline in one strand; the alkali water washing system, the depropanization system and the deisobutanizer pipeline are communicated in series.
Preferably, it comprises: a first pump; the first pump is arranged on a pipeline where the post-ether C4 storage tank is communicated with the raw material purifying system.
Preferably, it comprises: a second pump; the second pump is arranged on a pipeline which is communicated with the heavy C4 storage tank and the alkylation reactor.
Preferably, it comprises: a third pump; the third pump is arranged on a pipeline which is communicated with the saturated LPG storage tank and the depropanizer.
Preferably, it comprises: the high-efficiency turbulent flow mixer is characterized in that a propane feeding pipeline and an alkali liquor feeding pipeline of the alkali washing device are respectively communicated with a feeding port of the high-efficiency turbulent flow mixer; the propane feeding pipeline and the desalted water feeding pipeline of the water washing device are respectively communicated with the feeding port of the efficient turbulent flow mixer.
Preferably, it comprises: the water conservancy diversion distributor, the water conservancy diversion distributor is installed in alkaline wash and washing liquid separation jar this application can produce beneficial effect include:
1) According to the alkylation feeding device with low inert circulation and low energy consumption, which is provided by the application, after a saturated LPG (liquefied petroleum gas) storage tank is connected with a depropanizer and a deisobutanizer in series, inert components (n-butane and propane) with more than 76% in the saturated LPG raw material are removed, so that the amount of invalid raw materials entering a reactor system and a rectifying system is greatly reduced; the circulation amount of inert components in an alkylation reaction system and a rectification system is reduced, the specification of key equipment of an alkylation device with the same capacity is reduced, the purchase cost of the device equipment is reduced, and the fixed cost of ton products is reduced.
2) The application provides a low inert circulation volume, low energy consumption alkylation feed arrangement, with saturated liquefied gas, C4 after the ether and heavy C4 raw materials separate storage, implement the accurate ratio feeding of multiple spot to alkylation device, promote device raw materials adaptability by a wide margin, solve device productivity bottleneck, reduce product fixed cost.
3) The alkylation feeding device with low inert circulation and low energy consumption is additionally provided with an alkaline washing system and a water washing system, and a discharge hole at the upper middle part of the reactor is communicated with an alkaline washing system pipeline; the materials discharged by the propane reduction in the washing and removing reaction system contain a large amount of sulfides, so that serious corrosion hazard of the sulfides to equipment is eliminated.
4) The application provides a low inert circulation volume, low energy consumption alkylation feed arrangement, independently develop 20 alloy material high-efficient vortex mixers (utilizing swirl shower nozzle + ripple baffling board) in alkaline water washing system, with the propane intensive mixing of reaction system in discharge, alkali lye, aqueous solution, promote the sulfide impurity efficiency in rejecting the propane, realize low investment, low alkali lye and water consumption solution system in the corrosion problem in operation.
5) According to the alkylation feeding device with low inert circulation and low energy consumption, the diversion distributor is arranged in the liquid separating tank in the alkaline water washing system, so that effective separation of propane, alkaline liquid and water is improved, and consumption of the alkaline liquid and the water is reduced.
6) The alkylation feeding device with low inert circulation and low energy consumption is provided by connecting a discharge hole at the upper middle part of a reactor with an alkaline water washing system and a depropanizer in series through pipelines in sequence; the control of the propane content in the reactor is realized, the propane in the reaction system is ensured to be stabilized at the optimal control content, the isobutane in the discharged material is recovered, and the utilization rate of the raw materials is improved.
Drawings
FIG. 1 is a schematic diagram of a low inert recycle and low energy alkylation feed apparatus provided herein;
FIG. 2 is a schematic view of the high-efficiency turbulent mixer (20 alloy material, assembly formed by optimizing combination of cyclone nozzle and corrugated baffle plate) provided by the application;
fig. 3 is a schematic view of a diversion distributor in a liquid separation tank provided by the application.
Legend description:
1. an etheric C4 storage tank; 2. a heavy C4 tank; 3. a saturated LPG storage tank; 11. a first pump; 21. a second pump; 31. a third pump; 4. a raw material purification system; 5. a depropanization system; 6. an alkaline water washing system; 7. an alkylation reactor; 8. an isobutane recycle component; 9. and (3) removing n-butane from the rectifying tower.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.
Technical means which are not described in detail in the application and are not used for solving the technical problems of the application are all arranged according to common general knowledge in the field, and various common general knowledge arrangement modes can be realized.
Referring to fig. 1-3, the low inert recycle, low energy alkylation feed apparatus provided herein includes: an isobutane recycle component; the isobutane circulating assembly is communicated with a circulating interface pipeline of the alkylation reactor, specifically, products generated in the reactor firstly enter the isobutane circulating assembly to remove propane and isobutane, and then the isobutane is returned to the reactor to realize isobutane circulation. Meanwhile, in order to regulate and control the propane content in the reactor, a discharge port of the reaction system is also connected with an alkaline water washing system and a depropanization system in series, so that the removal of redundant propane in the reaction reactor is realized, the propane content in the reactor is controlled, the normal reaction is maintained, isobutane in discharged materials is recovered, and the utilization rate of raw materials is improved. The heavy C4 tank is in direct communication with the alkylation reactor conduit.
While at the same time reducing the amount of ineffective feed to the reactor system and rectification system; after a saturated LPG (liquefied petroleum gas) storage tank is connected in series with a depropanization rectifying tower and a deisobutanization rectifying tower pipeline, inert components (n-butane and propane) with more than 76% in the saturated LPG raw material are removed before the raw material enters a reactor and a rectifying system; the circulation amount of inert components in an alkylation reaction system and a rectification system is reduced, the specification of key equipment of an alkylation device with the same capacity is reduced, the purchase cost of the device equipment is reduced, and the fixed cost of ton products is reduced.
Meanwhile, in order to promote the device raw materials to be converted in situ to the maximum extent; saturated liquefied gas, C4 after ether and heavy C4 raw materials are stored separately, multipoint accurate proportioning feeding is implemented on an alkylation device, the raw material adaptability of the device is greatly improved, the productivity bottleneck of the device is solved, and the product fixing cost is reduced.
In one embodiment, the method comprises the following steps: the diversion distributor is arranged in the alkaline washing and water washing liquid separating tank.
In one embodiment, the saturated LPG tank is in line communication with the depropanization system. The control of the propane content in the deisobutanizer is realized, the size of key equipment of an alkylation device is reduced, the purchase cost of the device equipment is reduced, and the steam and electricity consumption of the product is reduced.
In one embodiment, the recycle outlet of the reactor is in communication with a depropanizer line; the circulating inlet of the reactor is communicated with a deisobutanizer pipeline. The isobutane recycle of the product in the reactor was achieved.
The reactor is also communicated with a post-ether C4 and heavy C4 storage tank pipeline so as to realize multi-point feeding. The discharge port of the deisobutanizer is communicated with the feed port pipeline of the deisobutanizer; the effective separation of the n-butane in the product from the product is realized.
In a specific embodiment, the method further comprises: a first pump; the first pump is arranged on a pipeline where the post-ether C4 storage tank is communicated with the raw material purifying system.
In a specific embodiment, the method further comprises: a second pump; the second pump is arranged on a pipeline which is communicated with the heavy C4 storage tank and the alkylation reactor.
In one embodiment, the method comprises the following steps: a third pump; the third pump is arranged on a pipeline which is communicated with the saturated LPG storage tank and the depropanizer.
The device realizes that isobutane in saturated liquefied gas is fed into an alkylation reactor, and simultaneously reduces the construction investment and the production energy consumption of the device.
After the device is put into use, the adaptability of the raw materials of the device is improved, the capacity bottleneck of the device is broken through, the circulation quantity of inert components in an alkylation reaction system and a rectification system is reduced, the key equipment size of the alkylation device is reduced, the purchase cost of the device equipment is reduced, the steam and electricity consumption of the product is reduced, and the ton product cost is reduced. Eliminating the harm of sulfide in the system to equipment and pipelines, recovering isobutane in the discharged materials of the reactor, and improving the utilization rate of raw materials.
Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.
Claims (8)
1. A low inert recycle, low energy alkylation feed apparatus comprising: an after-ether C4 storage tank, a heavy C4 storage tank, a saturated LPG storage tank, a raw material purification system, an alkylation reactor, a depropanization system, an alkaline water washing system, a n-butane removal system and an isobutane circulation assembly; the saturated LPG storage tank is communicated with the depropanization system and the isobutane circulating assembly in series; the alkylation reactor, the alkaline water washing system, the depropanization system and the isobutane circulating assembly are communicated through pipelines; the alkylation reactor and the isobutane circulating assembly are communicated through a pipeline; the post-ether C4 storage tank and the raw material purifying system are communicated with an alkylation reactor pipeline in series; the heavy C4 tank is in communication with the alkylation reactor conduit and the isobutane recycle assembly comprises: a deisobutanizer, an isobutane circulating pump, and a raw material/isobutane mixer; the bottom discharge port of the depropanizer is communicated with the feed port pipeline of the deisobutanizer; the isobutane discharged from the top of the deisobutanizer enters a mixer together with the raw materials from a raw material purifying system by using an isobutane circulating pump, and the outlet of the mixer is communicated with an alkylation reactor.
2. The low inert recycle, low energy consumption alkylation feed apparatus of claim 1, wherein the saturated LPG tank, the depropanizer system, the isobutane recycle assembly are in series communication with the alkylation reactor conduit.
3. The low inert recycle and low energy alkylation feed apparatus of claim 1 wherein the alkylation reactor effluent is in line communication with the caustic wash system; the alkali water washing system, the depropanization system and the deisobutanizer pipeline are communicated in series.
4. The low inert recycle, low energy alkylation feed apparatus of claim 1, comprising: a first pump; the first pump is arranged on a pipeline where the post-ether C4 storage tank is communicated with the raw material purifying system.
5. The low inert recycle, low energy alkylation feed apparatus of claim 1, comprising: a second pump; the second pump is arranged on a pipeline which is communicated with the heavy C4 storage tank and the alkylation reactor.
6. The low inert recycle, low energy alkylation feed apparatus of claim 1, comprising: a third pump; the third pump is arranged on a pipeline which is communicated with the saturated LPG storage tank and the depropanizer.
7. The low inert recycle, low energy alkylation feed apparatus of claim 1, comprising: the high-efficiency turbulent flow mixer is characterized in that a propane feeding pipeline and an alkali liquor feeding pipeline of the alkali washing device are respectively communicated with a feeding port of the high-efficiency turbulent flow mixer; the propane feeding pipeline and the desalted water feeding pipeline of the water washing device are respectively communicated with the feeding port of the efficient turbulent flow mixer.
8. The low inert recycle, low energy alkylation feed apparatus of claim 1, comprising: the diversion distributor is arranged in the alkaline washing and water washing liquid separating tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321875528.4U CN220345778U (en) | 2023-07-17 | 2023-07-17 | Low inert circulation and low energy consumption alkylation feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321875528.4U CN220345778U (en) | 2023-07-17 | 2023-07-17 | Low inert circulation and low energy consumption alkylation feeding device |
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| Publication Number | Publication Date |
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| CN220345778U true CN220345778U (en) | 2024-01-16 |
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|---|---|---|---|
| CN202321875528.4U Active CN220345778U (en) | 2023-07-17 | 2023-07-17 | Low inert circulation and low energy consumption alkylation feeding device |
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| Country | Link |
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| CN (1) | CN220345778U (en) |
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- 2023-07-17 CN CN202321875528.4U patent/CN220345778U/en active Active
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