CN220048079U - Online regeneration system of fixed bed furfural hydrogenation catalyst - Google Patents
Online regeneration system of fixed bed furfural hydrogenation catalyst Download PDFInfo
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- CN220048079U CN220048079U CN202321669312.2U CN202321669312U CN220048079U CN 220048079 U CN220048079 U CN 220048079U CN 202321669312 U CN202321669312 U CN 202321669312U CN 220048079 U CN220048079 U CN 220048079U
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- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 239000003054 catalyst Substances 0.000 title claims abstract description 52
- 238000005984 hydrogenation reaction Methods 0.000 title claims abstract description 41
- 230000008929 regeneration Effects 0.000 title claims abstract description 32
- 238000011069 regeneration method Methods 0.000 title claims abstract description 32
- 238000001784 detoxification Methods 0.000 claims abstract description 37
- 239000002994 raw material Substances 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 230000001502 supplementing effect Effects 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000012071 phase Substances 0.000 claims abstract description 22
- 238000003860 storage Methods 0.000 claims abstract description 18
- 239000007791 liquid phase Substances 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 93
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 46
- 239000001257 hydrogen Substances 0.000 claims description 44
- 229910052739 hydrogen Inorganic materials 0.000 claims description 44
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 43
- 229910052757 nitrogen Inorganic materials 0.000 claims description 25
- 238000007781 pre-processing Methods 0.000 claims 2
- 230000008676 import Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- XPFVYQJUAUNWIW-UHFFFAOYSA-N furfuryl alcohol Chemical compound OCC1=CC=CO1 XPFVYQJUAUNWIW-UHFFFAOYSA-N 0.000 description 9
- VQKFNUFAXTZWDK-UHFFFAOYSA-N 2-Methylfuran Chemical compound CC1=CC=CO1 VQKFNUFAXTZWDK-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- OZJPLYNZGCXSJM-UHFFFAOYSA-N 5-valerolactone Chemical compound O=C1CCCCO1 OZJPLYNZGCXSJM-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 239000007849 furan resin Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/584—Recycling of catalysts
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- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
The utility model relates to an online regeneration system of a fixed bed furfural hydrogenation catalyst; the device comprises a furfural storage tank, wherein the furfural storage tank is connected with a feed inlet of a raw material pretreatment device, a gas phase outlet of the raw material pretreatment device is connected with an inlet of a fixed bed reactor, a catalyst layer is arranged in a tube pass of the fixed bed reactor, a heat exchange unit is arranged on a shell pass of the fixed bed reactor, a tube pass outlet of the fixed bed reactor is connected with a gas-liquid separator through a reactor outlet valve, a process gas side of a heat exchanger and a cooler, and a liquid phase outlet of the gas-liquid separator is connected with the storage tank; the gas phase outlet of the gas-liquid separator is respectively connected with a vent pipe network and a gas circulation supplementing unit, and the gas circulation supplementing unit is respectively connected with the inlet of the fixed bed reactor and the gas inlet of the raw material pretreatment device; a detoxification unit connected in parallel with a reactor outlet valve is arranged between a tube side outlet of the fixed bed reactor and a process gas side of the heat exchanger; the method has the characteristics of saving catalyst resources and reducing the production cost of enterprises.
Description
Technical Field
The utility model relates to the technical field of accessory parts of furfural hydrogenation reaction, in particular to an online regeneration system of a fixed bed furfural hydrogenation catalyst.
Background
The conventional form is furfural obtained by corn cob seed treatment, which is an important chemical raw material, specifically, the downstream derivatives of the furfural comprise furfuryl alcohol, furan resin, valerolactone and other fine chemical and pharmaceutical chemical products. The furfural hydrogenation process is generally divided into three processes of fixed bed continuous hydrogenation, fluidized bed continuous hydrogenation and kettle type intermittent hydrogenation according to the type of a reactor, and when the furfural hydrogenation reaction is carried out through the reaction process, the furfural hydrogenation byproducts comprise part of coke-shaped polymers and high boiling point substances, so that the catalyst for the furfural hydrogenation is disposable, waste is caused, and the production cost of enterprises is increased.
Disclosure of Invention
The utility model aims to provide an online regeneration system of a fixed bed furfural hydrogenation catalyst, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the on-line regeneration system of the fixed bed furfural hydrogenation catalyst comprises a furfural storage tank, wherein the furfural storage tank is connected with a feed inlet of a raw material pretreatment device, a gas phase outlet of the raw material pretreatment device is connected with an inlet of a fixed bed reactor, a catalyst layer is arranged in a tube pass of the fixed bed reactor, a heat exchange unit is arranged on a shell pass of the fixed bed reactor, a tube pass outlet of the fixed bed reactor is connected with a gas-liquid separator through a reactor outlet valve, a process gas side of the heat exchanger and a cooler, and a liquid phase outlet of the gas-liquid separator is connected with the storage tank; the gas phase outlet of the gas-liquid separator is respectively connected with a vent pipe network and a gas circulation supplementing unit, and the gas circulation supplementing unit is respectively connected with the inlet of the fixed bed reactor and the gas inlet of the raw material pretreatment device; a detoxification unit connected in parallel with a reactor outlet valve is arranged between a tube side outlet of the fixed bed reactor and a process gas side of the heat exchanger.
The beneficial effects of the utility model are as follows: the utility model can be used for normal furfural hydrogenation reaction by arranging a furfural storage tank, a raw material pretreatment device, a fixed bed reactor, a gas-liquid separator and the like, and is suitable for producing serial products such as 2-methylfuran, furfuryl alcohol and the like by furfural hydrogenation reaction; the catalyst in the catalyst layer is preferably a fixed bed furfural hydrogenation catalyst taking copper element as a main component; the heat exchange in the heat exchange unit comprises heat exchange for removing heat during the hydrogenation reaction of the furfural, and the catalyst on-line regeneration heats the fixed bed reactor; furthermore, the catalyst is detoxified by the detoxification unit, and meanwhile, nitrogen replacement is carried out in the system by the gas circulation supplementing unit, so that a foundation is laid for online regeneration of the catalyst, the furfural hydrogenation catalyst can be regenerated for 2-3 times by the system, the service life of the catalyst is prolonged by 1/3-1/2, and the characteristics of saving catalyst resources and reducing the production cost of enterprises are achieved.
Preferably, the detoxification unit comprises a first tee joint arranged between a tube side outlet of the fixed bed reactor and a reactor outlet valve, a second tee joint arranged between the reactor outlet valve and a process gas side of the heat exchanger, and a detoxification inlet valve, a detoxification groove and a detoxification outlet valve are sequentially arranged between the first tee joint and the second tee joint.
Preferably, a third tee joint is arranged between the gas phase outlet of the raw material pretreatment device and the inlet of the fixed bed reactor, a fourth tee joint is arranged at the outlet of the gas circulation supplementing unit, the second end of the fourth tee joint is connected with the gas inlet of the raw material pretreatment device, and the third end of the fourth tee joint is connected with the third end of the third tee joint.
Preferably, a furfural feed valve is arranged between the gas phase outlet of the raw material pretreatment device and the third tee joint, a first hydrogen valve is arranged between the second end of the fourth tee joint and the gas inlet of the raw material pretreatment device, and a second hydrogen valve is arranged between the third end of the fourth tee joint and the third end of the third tee joint.
Preferably, the gas circulation supplementing unit comprises a gas compressor, the gas compressor is connected with the fourth tee joint through a circulation gas side of the heat exchanger, a circulation gas pipeline is arranged between the gas compressor and the circulation gas side of the heat exchanger, and the circulation gas pipeline is respectively connected with a hydrogen pipe network, a nitrogen pipe network and an instrument air pipeline.
Preferably, the inlet of the gas compressor is connected with the gas phase outlet of the gas-liquid separator through a fifth tee joint, and the third end of the fifth tee joint is connected with a vent pipe network; the hydrogen pipe network is connected with the circulating gas pipeline through a hydrogen feeding valve; the nitrogen pipe network is connected with the circulating gas pipeline through a nitrogen feed valve; the instrument air pipeline is connected with the circulating air pipeline through an instrument air feed valve.
Preferably, the heat exchange unit comprises a hot water tank, an outlet of the hot water tank is connected with the lower part of a shell side of the fixed bed reactor through a hot water circulating pump, and the upper part of the shell side of the fixed bed reactor is connected with a water return port of the hot water tank;
preferably, the hot water tank is connected with the water supplementing pipeline, the lower part of the hot water tank is connected with the medium-pressure steam pipe network, and the top of the hot water tank is connected with the steam pipe network.
The online regeneration system of the fixed bed furfural hydrogenation catalyst prepared according to the scheme is suitable for producing serial products such as 2-methyl furan, furfuryl alcohol and the like through furfural hydrogenation reaction; in the traditional technology, the original catalyst needs to be cleaned manually in the stopping stage, and new catalyst is filled after cleaning, so that the labor intensity in the process is high; the catalyst can be regenerated by carrying out nitrogen replacement in the system and detoxification treatment on the catalyst, so that the catalyst is fully utilized, the production cost of enterprises is reduced, the cleaning and filling frequency of the catalyst is reduced, and the labor intensity is effectively reduced.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
In the figure: 1. a fixed bed reactor; 2. a hot water tank; 3. a hot water circulation pump; 4. a steam pipe network; 5. a water supplementing line; 6. a reactor outlet valve; 7. a detoxification inlet valve; 8. a detoxification groove; 9. a detoxification outlet valve; 10. a heat exchanger; 11. a cooler; 12. a gas-liquid separator; 13. a storage tank; 14. a gas compressor; 15. a first hydrogen valve; 16. a second hydrogen valve; 17. a hydrogen pipe network; 18. a raw material pretreatment device; 19. a furfural storage tank; 20. a furfural feed valve; 21. a medium pressure steam pipe network; 22. a nitrogen pipe network; 23. a nitrogen feed valve; 24. a hydrogen feed valve; 25. an instrument air feed valve; 26. an instrument air duct; 27. emptying the pipe network; 28. a catalyst layer; 29. a first tee; 30. a second tee; 31. a third tee; 32. a fourth tee; 33. and a fifth tee joint.
Detailed Description
The technical solutions in 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.
Referring to fig. 1, an online regeneration system of a fixed bed furfural hydrogenation catalyst comprises a furfural storage tank 19, wherein the furfural storage tank 19 is connected with a feed inlet of a raw material pretreatment device 18, a gas phase outlet of the raw material pretreatment device 18 is connected with an inlet of a fixed bed reactor 1, a catalyst layer 28 is arranged in a tube side of the fixed bed reactor 1, a heat exchange unit is arranged on a shell side of the fixed bed reactor 1, a tube side outlet of the fixed bed reactor 1 is connected with a gas-liquid separator 12 through a reactor outlet valve 6, a process gas side of a heat exchanger 10 and a cooler 11, and a liquid phase outlet of the gas-liquid separator 12 is connected with a storage tank 13; the gas phase outlet of the gas-liquid separator 12 is respectively connected with a vent pipe network 27 and a gas circulation supplementing unit, and the gas circulation supplementing unit is respectively connected with the inlet of the fixed bed reactor 1 and the gas inlet of the raw material pretreatment device 18; a detoxification unit connected in parallel with a reactor outlet valve 6 is arranged between a tube side outlet of the fixed bed reactor 1 and a process gas side of the heat exchanger 10. The raw material pretreatment device 18 comprises a vaporizer, a raw material preheater, a superheater and other devices and equipment, and is mainly used for pretreating raw materials so as to meet the requirement of the fixed bed reactor 1 for carrying out furfural hydrogenation reaction; the tube side outlet of the fixed bed reactor 1, the reactor outlet valve 6, the process gas side of the heat exchanger 10, the flow pipeline of the cooler 11 and the gas-liquid separator 12 can be applied to the production of furfural hydrogenation reactants, nitrogen replacement, catalyst regeneration and other procedures, and the gas circulation feeding unit can be applied to the raw material (hydrogen) supply of furfural hydrogenation reaction, and can also provide different atmosphere environments for the whole system so as to be beneficial to realizing the pre-operation of catalyst regeneration and catalyst regeneration; in particular, the heat exchange in the heat exchange unit disclosed by the utility model comprises heat exchange for removing heat during the hydrogenation reaction of furfural and heating the fixed bed reactor by on-line regeneration of the catalyst.
Further, the detoxification unit comprises a first tee 29 arranged between the tube side outlet of the fixed bed reactor 1 and the reactor outlet valve 6, a second tee 30 between the reactor outlet valve 6 and the process gas side of the heat exchanger 10, and a detoxification inlet valve 7, a detoxification tank 8 and a detoxification outlet valve 9 are arranged between the first tee 29 and the second tee 30 in sequence. The detoxification groove 8 is mainly used for particulate matters and oxysulfide in the catalyst, and the detoxification groove 8 is internally provided with fillers such as desulfurization catalyst, porcelain balls and the like; the aim of easy control can be achieved by providing a detoxification inlet valve 7 and a detoxification outlet valve 9.
Further, a third tee joint 31 is arranged between the gas phase outlet of the raw material pretreatment device 18 and the inlet of the fixed bed reactor 1, a fourth tee joint 32 is arranged at the outlet of the gas circulation supplementing unit, the second end of the fourth tee joint 32 is connected with the gas inlet of the raw material pretreatment device 18, and the third end of the fourth tee joint 32 is connected with the third end of the third tee joint 31. The gas circulation supplementing unit can be used for supplying hydrogen to the raw material pretreatment device 18 for the hydrogenation reaction of the furfural through the arrangement, and can be directly connected with the fixed bed reactor 1 so as to achieve the purposes of pretreatment and regeneration of the catalyst.
Further, a furfural feed valve 20 is arranged between the gas phase outlet of the raw material pretreatment device 18 and the third tee joint 31, a first hydrogen valve 15 is arranged between the second end of the fourth tee joint 32 and the gas inlet of the raw material pretreatment device 18, and a second hydrogen valve 16 is arranged between the third end of the fourth tee joint 32 and the third end of the third tee joint 31.
Further, the gas circulation supplementing unit comprises a gas compressor 14, the gas compressor 14 is connected with a fourth tee joint 32 through a circulation gas side of the heat exchanger 10, a circulation gas pipeline is arranged between the gas compressor 14 and the circulation gas side of the heat exchanger 10, and the circulation gas pipeline is respectively connected with a hydrogen pipe network 17, a nitrogen pipe network 22 and an instrument air pipeline 26.
Further, the inlet of the gas compressor 14 is connected to the gas phase outlet of the gas-liquid separator 12 through a fifth tee 33, and the third end of the fifth tee 33 is connected to the vent pipe network 27; the hydrogen pipe network 17 is connected with a circulating gas pipeline through a hydrogen feed valve 24; the nitrogen pipe network 22 is connected with a circulating gas pipeline through a nitrogen feed valve 23; the meter air line 26 is connected to the circulation air line via a meter air feed valve 25.
Further, the heat exchange unit comprises a hot water tank 2, an outlet of the hot water tank 2 is connected with the lower part of a shell side of the fixed bed reactor 1 through a hot water circulating pump 3, and the upper part of the shell side of the fixed bed reactor 1 is connected with a water return port of the hot water tank 2; the hot water tank 2 is connected with the water supplementing pipeline 5, the lower part of the hot water tank 2 is connected with the medium-pressure steam pipe network 21, and the top of the hot water tank 2 is connected with the steam pipe network 4. The hot water tank 2 can be used for removing heat generated by the reaction in the fixed bed reactor 1 during the hydrogenation reaction of the furfural, and can also be used for providing heat for the fixed bed reactor 1 in the catalytic regeneration pretreatment and regeneration stages.
The working principle of the utility model is as follows: step 1: nitrogen replacement is carried out after the system is stopped; the reactor outlet valve 6, the second hydrogen valve 16 and the nitrogen gas feed valve 23 are in an open state, and at the same time, the detoxification groove inlet valve 7, the detoxification groove outlet valve 9, the first hydrogen valve 15, the furfural feed valve 20, the hydrogen feed valve 24 and the instrument air feed valve 25 are in a closed state; the nitrogen pipe network 22 supplements nitrogen into the fixed bed reactor 1 through the nitrogen feed valve 23, and the nitrogen sequentially passes through the circulating gas side of the heat exchanger 10, the fixed bed reactor 1, the reactor outlet valve 6, the process gas side of the heat exchanger 10, the gas phase outlets of the cooler 11, the gas-liquid separator 12 and the gas-liquid separator 12, part of the nitrogen enters the emptying pipe network 27 to be emptied, and part of the nitrogen enters the gas compressor 14 to continue circulation, and the molar content of hydrogen in the system is replaced by the nitrogen for one time until the molar content of hydrogen in the system is less than 0.5%; step 2: entering a heating and burning stage of a fixed bed reactor; the inlet valve 7 of the detoxification groove, the outlet valve 9 of the detoxification groove and the instrument air feed valve 25 are in an open state, and at the same time, the outlet valve 6 of the reactor, the first hydrogen valve 15, the furfural feed valve 20, the nitrogen feed valve 23 and the hydrogen feed valve 24 are in a closed state; the utility model realizes the control of the bed temperature in the fixed bed reactor 1 through the circulation of the hot water tank 2 and the hot water circulating pump 3, and the bed temperature of the fixed bed reactor 1 is controlled to be 50-230 ℃ and is changed according to different scorching stages; the water supplementing pipeline 5 can be used for supplementing water to the hot water tank 2 in the heating process, medium-pressure steam is supplemented to the hot water tank 2 through the medium-pressure steam pipe network 21 to realize heating, steam generated in the hot water tank 2 enters the steam pipe network 4, and hot water can be supplemented in the water supplementing pipeline 5; the instrument air in the instrument air pipeline 26 sequentially passes through the circulating air side of the heat exchanger 10, the fixed bed reactor 1, the inlet valve 7 of the detoxification groove, the detoxification groove 8, the outlet valve 9 of the detoxification groove, the process air side of the heat exchanger 10, the gas phase outlets of the cooler 11, the gas-liquid separator 12 and the gas-liquid separator 12, part of instrument air enters the emptying pipe network 27 to be emptied, and part of instrument air enters the gas compressor 14 to continue circulating until the oxygen mole content in the system is less than 0.2%; step 3: a catalyst re-reduction stage; the reactor outlet valve 6, the second hydrogen valve 16 and the hydrogen feeding valve 24 are in an open state, meanwhile, the detoxification groove inlet valve 7, the detoxification groove outlet valve 9, the first hydrogen valve 15, the furfural feeding valve 20, the nitrogen feeding valve 23 and the instrument air feeding valve 25 are in a closed state, the hydrogen pipe network 17 supplements hydrogen into the fixed bed reactor 1 through the hydrogen feeding valve 24, the hydrogen sequentially passes through the circulating gas side of the heat exchanger 10, the fixed bed reactor 1, the reactor outlet valve 6, the process gas side of the heat exchanger 10, the cooler 11 and the gas-liquid separator 12, the gas-liquid separator 12 performs gas-liquid separation, the liquid phase enters the storage tank 13 and is discharged outside, the gas phase passes through the gas phase outlet of the gas-liquid separator 12, part of the hydrogen enters the emptying pipe network 27 to be emptied, and the part of the hydrogen enters the gas compressor 14 to continue circulating, so that the hydrogen concentration in the system gradually rises to 80-95%; simultaneously, the temperature in the fixed bed reactor 1 is maintained at 220-230 ℃ through a heat exchange unit; step 4: a normal furfural hydrogenation reaction stage; the reactor outlet valve 6, the hydrogen gas feed valve 24, the first hydrogen valve 15 and the furfural feed valve 20 are in an open state, and at the same time, the detoxification groove inlet valve 7, the detoxification groove outlet valve 9, the second hydrogen valve 16, the nitrogen gas feed valve 23 and the instrument air feed valve 25 are in a closed state; the furfural in the furfural storage tank 19 enters the raw material pretreatment device 18, the hydrogen pipe network 17 enters the raw material pretreatment device 18 through the hydrogen feeding valve 24, the circulating gas side of the heat exchanger 10 and the first hydrogen valve 15, and the raw material is pretreated in the raw material pretreatment device 18 and then enters the fixed bed reactor 1 for carrying out furfural hydrogenation reaction; the heat exchange unit removes reaction heat in the furfural hydrogenation reaction process, the temperature of the fixed bed reactor 1 is reduced by the circulation of the hot water tank 2 and the hot water circulating pump 3, the water supplementing pipeline 5 supplements water for the hot water tank 2, and steam generated in the hot water tank 2 enters the steam pipe network 4; the product of the furfural hydrogenation reaction enters a gas-liquid separator 12 from a reactor outlet valve 6, a process gas side of a heat exchanger 10 and a cooler 11, after the gas-liquid separator 12 performs gas-liquid separation, the gas phase is hydrogen which can be repeatedly fed into a raw material pretreatment device 18 for reuse, and the liquid phase enters a subsequent process through a storage tank 13 for treatment; the catalyst regeneration process is particularly suitable for fixed bed furfural hydrogenation catalysts which take copper element as a main component, detoxication treatment is carried out on the catalyst through a detoxification unit, and meanwhile, nitrogen replacement is carried out in a system through a gas circulation supplementing unit, so that a foundation is laid for online regeneration of the catalyst, the furfural hydrogenation catalyst can be regenerated for 2-3 times through the system, the service life of the catalyst is prolonged by 1/3-1/2, and the characteristics of saving catalyst resources and reducing the production cost of enterprises are achieved.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides an online regeneration system of fixed bed furfural hydrogenation catalyst, includes furfural storage tank (19), and furfural storage tank (19) link to each other with the feed inlet of raw materials preprocessing device (18), and the gas phase export of raw materials preprocessing device (18) links to each other with the import of fixed bed reactor (1), its characterized in that: a catalyst layer (28) is arranged in the tube side of the fixed bed reactor (1), a heat exchange unit is arranged on the shell side of the fixed bed reactor (1), the tube side outlet of the fixed bed reactor (1) is connected with a gas-liquid separator (12) through a reactor outlet valve (6), the process gas side of a heat exchanger (10) and a cooler (11), and the liquid phase outlet of the gas-liquid separator (12) is connected with a storage tank (13);
the gas phase outlet of the gas-liquid separator (12) is respectively connected with a vent pipe network (27) and a gas circulation supplementing unit, and the gas circulation supplementing unit is respectively connected with the inlet of the fixed bed reactor (1) and the gas inlet of the raw material pretreatment device (18);
a detoxification unit connected in parallel with a reactor outlet valve (6) is arranged between a tube side outlet of the fixed bed reactor (1) and a process gas side of the heat exchanger (10).
2. The online regeneration system of a fixed bed furfural hydrogenation catalyst according to claim 1, wherein the online regeneration system is characterized in that: the detoxification unit comprises a first tee joint (29) arranged between a tube side outlet of the fixed bed reactor (1) and a reactor outlet valve (6), a second tee joint (30) arranged between the reactor outlet valve (6) and a process gas side of the heat exchanger (10), and a detoxification inlet valve (7), a detoxification groove (8) and a detoxification outlet valve (9) are sequentially arranged between the first tee joint (29) and the second tee joint (30).
3. The online regeneration system of a fixed bed furfural hydrogenation catalyst according to claim 1, wherein the online regeneration system is characterized in that: a third tee joint (31) is arranged between a gas phase outlet of the raw material pretreatment device (18) and an inlet of the fixed bed reactor (1), a fourth tee joint (32) is arranged at an outlet of the gas circulation supplementing unit, a second end of the fourth tee joint (32) is connected with an air inlet of the raw material pretreatment device (18), and a third end of the fourth tee joint (32) is connected with a third end of the third tee joint (31).
4. The online regeneration system of a fixed bed furfural hydrogenation catalyst according to claim 3, wherein the online regeneration system comprises: a furfural feed valve (20) is arranged between a gas phase outlet of the raw material pretreatment device (18) and a third tee joint (31), a first hydrogen valve (15) is arranged between a second end of a fourth tee joint (32) and an air inlet of the raw material pretreatment device (18), and a second hydrogen valve (16) is arranged between a third end of the fourth tee joint (32) and a third end of the third tee joint (31).
5. The online regeneration system of a fixed bed furfural hydrogenation catalyst according to claim 3, wherein the online regeneration system comprises: the gas circulation supplementing unit comprises a gas compressor (14), the gas compressor (14) is connected with a fourth tee joint (32) through a circulation gas side of the heat exchanger (10), a circulation gas pipeline is arranged between the gas compressor (14) and the circulation gas side of the heat exchanger (10), and the circulation gas pipeline is respectively connected with a hydrogen pipe network (17), a nitrogen pipe network (22) and an instrument air pipeline (26).
6. The online regeneration system of the fixed bed furfural hydrogenation catalyst according to claim 5, wherein the online regeneration system is characterized in that: an inlet of the gas compressor (14) is connected with a gas phase outlet of the gas-liquid separator (12) through a fifth tee joint (33), and a third end of the fifth tee joint (33) is connected with a vent pipe network (27);
the hydrogen pipe network (17) is connected with a circulating gas pipeline through a hydrogen feeding valve (24);
the nitrogen pipe network (22) is connected with the circulating gas pipeline through a nitrogen feed valve (23);
the instrument air pipeline (26) is connected with the circulating air pipeline through an instrument air feeding valve (25).
7. The online regeneration system of a fixed bed furfural hydrogenation catalyst according to claim 1, wherein the online regeneration system is characterized in that: the heat exchange unit comprises a hot water tank (2), an outlet of the hot water tank (2) is connected with the lower part of a shell side of the fixed bed reactor (1) through a hot water circulating pump (3), and the upper part of the shell side of the fixed bed reactor (1) is connected with a water return port of the hot water tank (2);
the hot water tank (2) is connected with the water supplementing pipeline (5), the lower part of the hot water tank (2) is connected with the medium-pressure steam pipe network (21), and the top of the hot water tank (2) is connected with the steam pipe network (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321669312.2U CN220048079U (en) | 2023-06-28 | 2023-06-28 | Online regeneration system of fixed bed furfural hydrogenation catalyst |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321669312.2U CN220048079U (en) | 2023-06-28 | 2023-06-28 | Online regeneration system of fixed bed furfural hydrogenation catalyst |
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| CN220048079U true CN220048079U (en) | 2023-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321669312.2U Active CN220048079U (en) | 2023-06-28 | 2023-06-28 | Online regeneration system of fixed bed furfural hydrogenation catalyst |
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| Country | Link |
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| CN (1) | CN220048079U (en) |
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2023
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