CN211411622U - Naphthalene process phthalic anhydride tail gas catalytic treatment system - Google Patents
Naphthalene process phthalic anhydride tail gas catalytic treatment system Download PDFInfo
- Publication number
- CN211411622U CN211411622U CN201921353998.8U CN201921353998U CN211411622U CN 211411622 U CN211411622 U CN 211411622U CN 201921353998 U CN201921353998 U CN 201921353998U CN 211411622 U CN211411622 U CN 211411622U
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- China
- Prior art keywords
- tail gas
- port
- phthalic anhydride
- pipeline
- treatment system
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- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 title claims abstract description 24
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 title claims abstract description 21
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000001179 sorption measurement Methods 0.000 claims description 23
- 239000007921 spray Substances 0.000 claims description 20
- 239000007809 chemical reaction catalyst Substances 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 8
- 238000012856 packing Methods 0.000 claims description 5
- IVLRWAWNKKMBFT-UHFFFAOYSA-N 2-benzofuran-1,3-dione;naphthalene Chemical compound C1=CC=CC2=CC=CC=C21.C1=CC=C2C(=O)OC(=O)C2=C1 IVLRWAWNKKMBFT-UHFFFAOYSA-N 0.000 claims 1
- 230000003647 oxidation Effects 0.000 abstract description 12
- 238000007254 oxidation reaction Methods 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 60
- 239000003054 catalyst Substances 0.000 description 5
- 238000005201 scrubbing Methods 0.000 description 5
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical group CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 229940078552 o-xylene Drugs 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- -1 cyclic acid anhydride Chemical class 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000008031 plastic plasticizer Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model relates to a naphthalene method phthalic anhydride tail gas catalytic treatment system, including the four-channel gas distributor, be equipped with first port, second port and third port on the four-channel gas distributor, the second port is connected with the one end of tail gas preheater through the pipeline, the other end of tail gas preheater is connected with the air inlet, the third port is connected with the motorised valve through the pipeline, the motorised valve still is connected with fan fixed connection, the four-channel components of a whole that can function independently distributor and the one end fixed connection of electric heater; the utility model adopts the specially designed four-channel gas distributor, the fluctuation of the pressure and the air quantity of the phthalic anhydride oxidation system caused by the catalytic oxidation system can not be caused during the operation, and the safe production of the oxidation device is ensured; and under the normal and stable running state of the oxidation device, the tail gas enters the catalytic oxidation device completely.
Description
Technical Field
The utility model belongs to the tail gas treatment field, concretely relates to naphthalene method phthalic anhydride tail gas catalytic treatment system.
Background
Phthalic anhydride is also called phthalic anhydride, phthalic anhydride C8H4O3Abbreviated as PA in English, which is a cyclic acid anhydride formed by intramolecular dehydration of phthalic acid. Phthalic anhydride is used as an important organic chemical raw material and is mainly used for producing plastic plasticizers, alkyd resins, dyes, unsaturated resins and certain medicines and pesticides. The preparation method is to carry out catalytic oxidation on naphthalene or o-xylene, and most of the phthalic anhydride is produced by adopting an o-xylene oxidation method at home at present.
Two tail gases are produced during the production of phthalic anhydride: switch tail gas and sprayer tail gas, it directly absorbs through the scrubbing tower generally to switch tail gas, realize switching the recovery of tail gas and recycle and environmental protection and handle, the processing of sprayer tail gas also directly inserts the scrubbing tower among the prior art, because the pressure of sprayer tail gas is high, the temperature is high, directly insert the scrubbing tower and handle, the effect of handling is not ideal, the pollutant in the gas of final evacuation is more, there is the environmental protection problem
SUMMERY OF THE UTILITY MODEL
To solve the problems set forth in the background art described above. The utility model provides a naphthalene method phthalic anhydride tail gas catalytic treatment system.
The utility model provides a naphthalene method phthalic anhydride tail gas catalytic treatment system, includes the four-channel gas distributor, be equipped with first port, second port and third port on the four-channel gas distributor, the second port passes through the pipeline and is connected with the one end of tail gas preheater, the other end and the air inlet of tail gas preheater are connected, the third port passes through the pipeline and is connected with the motorised valve, the motorised valve still is connected with fan fixed connection, the one end fixed connection of four-channel gas distributor and electric heater, electric heater's the other end passes through pipeline and reaction catalyst converter fixed connection, the reaction catalyst converter passes through pipeline and heat exchanger fixed connection, heat exchanger is connected with the four-channel gas distributor, first port passes through the pipeline and is connected with scrubbing tower and adsorption tank in proper order.
Furthermore, an electric valve is arranged on a pipeline between the reaction catalyst and the heat exchanger.
Furthermore, the tail gas preheater adopts a finned tube preheater, and adopts 0.6-1.6MPa steam for heating, and 5 groups of finned tube groups are arranged in the tail gas preheater.
Further, the washing tower is equipped with first shower and second shower from last to down in proper order be equipped with first shower, second shower on first shower, the second shower respectively, first shower, second shower all are connected with the liquid storage pot, the liquid storage pot still is connected with the washing tower pipeline.
Further, the adsorption tank is equipped with first backup pad and second backup pad from last to down in proper order, be equipped with the active carbon adsorption layer in the first backup pad, be equipped with the adsorption section packing layer in the second backup pad, still be equipped with the gas vent on the adsorption tank.
The utility model has the advantages that:
(1) the utility model adopts the specially designed four-channel gas distributor, the fluctuation of the pressure and the air quantity of the phthalic anhydride oxidation system caused by the catalytic oxidation system can not be caused during the operation, and the safe production of the oxidation device is ensured; and under the normal and stable running state of the oxidation device, the tail gas enters the catalytic oxidation device completely.
(2) The utility model discloses can satisfy the various production load requirements of phthalic anhydride device, can handle the tail gas in the production process completely to turn into the VOC of 98% above in the tail gas CO2And H2O。
(3) After the tail gas is treated by the utility model, the non-methane total hydrocarbon content standard executes the national standard, namely the non-methane total hydrocarbon content is less than or equal to 80mg/m3And no obvious yellow smoke and peculiar smell can be seen in tail gas emission.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is the structure schematic diagram of the catalytic treatment system for naphthalene-process phthalic anhydride tail gas of the present invention.
In the figure: the device comprises a reaction catalyst 1, a 2-electric valve, a 3-heat exchanger, a 4-four-channel gas distributor, a 5-first port, a 6-second port, a 7-tail gas preheater, an 8-gas inlet, a 9-third port, a 10-electric valve, a 11-fan, a 12-electric heater, a 13-first spray pipe, a 14-first spray head, a 15-washing tower, a 16-second spray pipe, a 17-second spray head, an 18-liquid storage tank, a 19-adsorption tank, a 20-activated carbon adsorption layer, a 21-gas outlet, a 22-first support plate, a 23-adsorption section packing layer and a 24-second support plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Examples
Please refer to fig. 1, the present invention provides the following technical solutions: the utility model provides a naphthalene method phthalic anhydride tail gas catalytic treatment system, including four passageway gas distributor 4, be equipped with first port 5 on four passageway gas distributor 4, second port 6 and third port 9, second port 6 passes through the pipeline and is connected with the one end of tail gas preheater 7, the other end and the air inlet 8 of tail gas preheater 7 are connected, third port 9 passes through the pipeline and is connected with motorised valve 10, motorised valve 10 still with 11 fixed connection of fan, four passageway gas distributor 4 and electric heater 12's one end fixed connection, electric heater 12's the other end passes through pipeline and 1 fixed connection of reaction catalyst converter, reaction catalyst converter 1 passes through pipeline and 3 fixed connection of heat exchanger, heat exchanger 3 is connected with four passageway gas distributor 4, first port 5 is connected with scrubbing tower 15 and adsorption tank 19 in proper order through the pipeline.
In this embodiment, an electric valve 2 is disposed on a pipe between the reaction catalyst 1 and the heat exchanger 3.
In the embodiment, the tail gas preheater 7 adopts a finned tube preheater and is heated by steam of 0.6-1.6MPa, and 5 groups of finned tube groups are arranged in the tail gas preheater.
In this embodiment, the washing tower 15 is sequentially provided with a first spray pipe 14 and a second spray pipe 16 from top to bottom, the first spray pipe 14 and the second spray pipe 16 are respectively provided with a first spray header 14 and a second spray header 17, the first spray pipe 14 and the second spray pipe 16 are both connected with a liquid storage tank 18, the liquid storage tank 18 is further connected with the washing tower 15 through a pipeline, gas enters the washing tower 15 from the bottom of the washing tower 15, after two times of spraying and adsorption, the washed liquid flows back to the liquid storage tank 18 through the pipeline for recycling, and a small amount of acidic gas is subjected to adsorption treatment.
In this embodiment, adsorption tank 19 is equipped with first backup pad 22 and second backup pad 24 from last to down in proper order, is equipped with activated carbon adsorption layer 20 on the first backup pad 22, is equipped with adsorption section packing layer 23 in the second backup pad 24, still be equipped with gas vent 21 on the adsorption tank 19, gas after the washing is through adsorption section packing layer 23, the 20 adsorption treatment of activated carbon adsorption layer in proper order, and the tail gas that will handle at last discharges away.
In this example, the catalyst in the reaction catalyst 1 is a noble metal Vocat III type catalyst of platinum and palladium imported from BASF corporation in the United states.
In this example, the electric heater 12 may be deactivated when the feed concentration reaches 50g/Nm 3; the tail gas preheater 7 may be disabled after the feed concentration reaches 65g/Nm 3.
The four-channel gas distributor 4 is a key device for controlling tail gas to enter the reaction catalytic converter 1, and can adjust the gas device which enters the reaction catalytic converter 1 and directly discharges the tail gas into the tail gas tower, so that the normal operation of the system is ensured, and the wind pressure of the whole system cannot be influenced during switching operation. The four-way to gas distributor is in a closed state at the beginning, tail gas directly enters the washing tower 15, the fan 11 and the electric heater 12 are started, hot air is sent to preheat the catalyst bed layer, when the temperature of the catalyst bed layer reaches 300 ℃, the four-way gas distributor 4 is controlled in a control room in a remote mode, the four-way gas distributor 4 is gradually opened, the temperature of gas at the inlet of the catalyst bed layer is controlled within a required temperature range until the four-way gas distributor 4 is completely opened, and the tail gas completely enters the reaction catalyst 1.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. The naphthalene method phthalic anhydride tail gas catalytic treatment system comprises a four-channel gas distributor (4), and is characterized in that: the four-channel gas distributor (4) is provided with a first port (5), a second port (6) and a third port (9), the second port (6) is connected with one end of a tail gas preheater (7) through a pipeline, the other end of the tail gas preheater (7) is connected with an air inlet (8), the third port (9) is connected with an electric valve (10) through a pipeline, the electric valve (10) is also fixedly connected with a fan (11), the four-channel gas distributor (4) is fixedly connected with one end of an electric heater (12), the other end of the electric heater (12) is fixedly connected with the reaction catalyst (1) through a pipeline, the reaction catalyst (1) is fixedly connected with the heat exchanger (3) through a pipeline, the heat exchanger (3) is connected with a four-channel gas distributor (4), and the first port (5) is sequentially connected with the washing tower (15) and the adsorption tank (19) through pipelines.
2. The catalytic treatment system for the tail gas of phthalic anhydride by naphthalene process according to claim 1, wherein an electric valve (2) is arranged on a pipeline between the reaction catalyst (1) and the heat exchanger (3).
3. The catalytic treatment system for the tail gas of phthalic anhydride by naphthalene process according to claim 1, wherein the tail gas preheater (7) is a finned tube preheater, and 5 groups of finned tube groups are arranged in the tail gas preheater (7).
4. The naphthalene phthalic anhydride tail gas catalytic treatment system according to claim 1, wherein the washing tower (15) is sequentially provided with a first spray pipe (13) and a second spray pipe (16) from top to bottom, the first spray pipe (13) and the second spray pipe (16) are respectively provided with a first spray header (14) and a second spray header (17), the first spray pipe (13) and the second spray pipe (16) are both connected with the liquid storage tank (18), and the liquid storage tank (18) is further connected with the washing tower (15) through a pipeline.
5. The catalytic treatment system for phthalic anhydride tail gas by naphthalene process according to claim 1, wherein the adsorption tank (19) is sequentially provided with a first support plate (22) and a second support plate (24) from top to bottom, the first support plate (22) is provided with an activated carbon adsorption layer (20), the second support plate (24) is provided with an adsorption section packing layer (23), and the adsorption tank (19) is further provided with an exhaust port (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921353998.8U CN211411622U (en) | 2019-08-20 | 2019-08-20 | Naphthalene process phthalic anhydride tail gas catalytic treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921353998.8U CN211411622U (en) | 2019-08-20 | 2019-08-20 | Naphthalene process phthalic anhydride tail gas catalytic treatment system |
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| Publication Number | Publication Date |
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| CN211411622U true CN211411622U (en) | 2020-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921353998.8U Active CN211411622U (en) | 2019-08-20 | 2019-08-20 | Naphthalene process phthalic anhydride tail gas catalytic treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110339712A (en) * | 2019-08-20 | 2019-10-18 | 河南庆安化工高科技股份有限公司 | A kind of naphthalene method benzoic anhydride tail-gas catalytic treatment system and its processing method |
-
2019
- 2019-08-20 CN CN201921353998.8U patent/CN211411622U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110339712A (en) * | 2019-08-20 | 2019-10-18 | 河南庆安化工高科技股份有限公司 | A kind of naphthalene method benzoic anhydride tail-gas catalytic treatment system and its processing method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
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Effective date of registration: 20231114 Granted publication date: 20200904 |
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