CN203990254U - Be used for the device of the corrosion of the rich hydrogen bromide condensate that minimizes origin automatic oxidation reaction device tower top Exhaust Gas stream - Google Patents
Be used for the device of the corrosion of the rich hydrogen bromide condensate that minimizes origin automatic oxidation reaction device tower top Exhaust Gas stream Download PDFInfo
- Publication number
- CN203990254U CN203990254U CN201420412113.8U CN201420412113U CN203990254U CN 203990254 U CN203990254 U CN 203990254U CN 201420412113 U CN201420412113 U CN 201420412113U CN 203990254 U CN203990254 U CN 203990254U
- Authority
- CN
- China
- Prior art keywords
- exhaust gas
- high pressure
- heater
- pressure absorber
- tower top
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000007789 gas Substances 0.000 title claims abstract description 85
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 229910000042 hydrogen bromide Inorganic materials 0.000 title claims abstract description 21
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 21
- 238000005260 corrosion Methods 0.000 title claims abstract description 20
- 230000007797 corrosion Effects 0.000 title claims abstract description 20
- 239000006096 absorbing agent Substances 0.000 claims abstract description 41
- 230000003647 oxidation Effects 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 10
- URLKBWYHVLBVBO-UHFFFAOYSA-N Para-Xylene Chemical group CC1=CC=C(C)C=C1 URLKBWYHVLBVBO-UHFFFAOYSA-N 0.000 description 4
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- -1 oxycarbide Chemical compound 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model relates to the device of the corrosion of the rich hydrogen bromide condensate for minimizing origin automatic oxidation reaction device tower top Exhaust Gas stream, and disclosed is to use the high pressure absorber that is connected to Exhaust Gas pre-heater to minimize the new equipment designs of the corrosion of the rich hydrogen bromide condensate of origin automatic oxidation reaction device tower top Exhaust Gas stream.
Description
Technical field
This utility model relates to the device of the corrosion of the rich hydrogen bromide condensate for minimizing origin automatic oxidation reaction device tower top Exhaust Gas stream, the Exhaust Gas that its heating produces in the oxidizing process of aromatic hydrocarbon, especially uses the catalyst, the paraxylene that contain bromine to form the Exhaust Gas producing in the air oxidation process of terephthalic acid (TPA).
Background technology
The terephthalic acid (TPA) preparation of the air oxidation in acetic acid solvent by paraxylene conventionally.The method produces the reactor tower top Exhaust Gas that contains acetic acid, hydrogen bromide and steam, and rudimentary (lower) bottom product that contains the crude terephthalic acid material in acetic acid slurries.Overhead gas by a series of condensers and treatment system to remove and to reclaim acetic acid and steam for recirculation.A treatment system is high pressure absorber., there are several problems in the corrosion about the equipment in the Exhaust Gas system in high pressure absorber downstream by the water condensate that contains hydrogen bromide.This especially affects for controlling high pressure absorber pressure and the pressure-control valve at the pressure of some technology oxidation reactors.Corrosion is also the problem in downstream heat exchanger.
Prior art systems comprises the water jet 50,55 entering in the Exhaust Gas stream B of high pressure absorber 10 downstreams and pressure-control valve 25 upstreams, and at the knock-out drum 60 of downstream C again, again to remove water together with any hydrogen bromide being removed from gas by water.Knock-out drum 60 is the large-scale expensive containers for avoiding corrosion to be made up of stainless steel.In the future the condensate (water and hydrogen bromide) of self-separation drum 60 deliver to discharge D1 for the treatment of.The overhead vapours D2 that hydrogen bromide by remaining, steam and other corrosive substances are formed delivers to pre-heater 20 and leaves the temperature that flows E for raising.Because knock-out drum 60, this prior art systems is expensive (referring to Fig. 4) for buying and moving.Therefore, suitable will be to remove this container, still obtain necessary pressure control and gas-heated simultaneously, simultaneous minimization corrosion.
Utility model content
Therefore, an object of utility model is to provide a kind of for minimizing the device of corrosion of rich hydrogen bromide condensate of origin automatic oxidation reaction device tower top Exhaust Gas stream, described device has been removed knock-out drum, still obtains necessary pressure control and gas-heated simultaneously, simultaneous minimization corrosion.
On the one hand, a kind of device of corrosion for the rich hydrogen bromide condensate that minimizes origin automatic oxidation reaction device tower top Exhaust Gas stream comprises:
High pressure absorber 10, described high pressure absorber 10 comprises:
Exhaust Gas entrance 5, described Exhaust Gas entrance 5 is suitable for being communicated with the tower top outlet fluid of oxidation reactor, for receiving oxidation reactor tower top Exhaust Gas stream;
A series of absorbing mediums 11,12,14,16 and 18, described a series of absorbing mediums 11,12,14,16 and 18 are in high pressure absorber inside; With
Exhaust Gas outlet, described Exhaust Gas outlet is for discharging by the gaseous component of a series of absorbing mediums 11,12,14,16 and 18;
Exhaust Gas pre-heater 20, described Exhaust Gas pre-heater 20 is communicated with the gaseous component from the Exhaust Gas outlet of high pressure absorber 10 for preheating with the Exhaust Gas outlet fluid of high pressure absorber 10; With
Pressure-control valve 25, described pressure-control valve 25 is communicated with Exhaust Gas pre-heater 20 fluids, and for controlling the pressure of high pressure absorber 10, wherein pressure-control valve 25 is in the downstream of Exhaust Gas pre-heater 20.
In a preferred embodiment, Exhaust Gas exports in high pressure absorber inside.
In another preferred embodiment, Exhaust Gas pre-heater 20 is connected to the outlet(discharge) flange (exit flange) on the top of high pressure absorber 10.
In another preferred embodiment, Exhaust Gas pre-heater 20 uses carrier pipe 22 to be connected to high pressure absorber 10, and wherein Exhaust Gas pre-heater 20 is vertically arranged in addition.
In another preferred embodiment, Exhaust Gas pre-heater 20 uses carrier pipe 22 to be connected to high pressure absorber 10, and wherein Exhaust Gas pre-heater 20 is horizontally disposed in addition.
Brief description of the drawings
Fig. 1 is according to an embodiment of the present utility model, uses and is connected to the high pressure absorber of Exhaust Gas pre-heater, for minimizing the schematic diagram of device of corrosion of rich hydrogen bromide condensate of origin automatic oxidation reaction device tower top Exhaust Gas stream.
Fig. 2 is according to another embodiment of the present utility model, uses and is connected to the high pressure absorber of Exhaust Gas pre-heater, for minimizing the schematic diagram of device of corrosion of rich hydrogen bromide condensate of origin automatic oxidation reaction device tower top Exhaust Gas stream.
Fig. 3 is according to another embodiment of the present utility model, uses and is connected to the high pressure absorber of Exhaust Gas pre-heater, for minimizing the schematic diagram of device of corrosion of rich hydrogen bromide condensate of origin automatic oxidation reaction device tower top Exhaust Gas stream.
Fig. 4 be use high pressure absorber, knock-out drum and Exhaust Gas pre-heater, for minimizing the schematic diagram of prior art of device of corrosion of rich hydrogen bromide condensate of origin automatic oxidation reaction device tower top Exhaust Gas stream.
Figure elements list
A=oxidation reactor tower top Exhaust Gas
The Exhaust Gas stream in B=high pressure absorber downstream
C=is from the stream that leaves of pressure-control valve
60=knock-out drum
The condensate that D1=discharges from knock-out drum
D2=is from the overhead vapours of knock-out drum
The Exhaust Gas that E=leaves from pre-heater
10=high pressure absorber
11=dry load
12=demister
The funnel-shaped tower tray of 14=
16=absorption tray
18=demister
The Exhaust Gas of F=before pre-heater
20=the first Exhaust Gas pre-heater
The Exhaust Gas that heated of G=before control valve
25=pressure-control valve
The Exhaust Gas that H=leaves from pre-heater
50=water jet
55=water
30=Exhaust Gas pipe
Detailed description of the invention
Surprisingly, have been found that pressure-control valve is placed on to the first heat exchanger downstream avoids the risk of corrosion to pressure drop.This is because Exhaust Gas is now in occurring higher than the temperature of water dew point significantly.This removes for the needs of water jet and allows to remove knock-out drum and relevant fund cost saving.Here, the first Exhaust Gas pre-heater is located immediately on the outlet(discharge) flange of high pressure absorber (Fig. 1).Alternatively, Exhaust Gas pre-heater is positioned at the downstream of high pressure absorber and connects (Fig. 2) by carrier pipe.
With reference to figure 1, the oxidation reactor tower top Exhaust Gas A that contains hydrogen bromide enters high pressure absorber tower 10.The multiple gaseous component that comprises methyl acetate and acetic acid is along with Exhaust Gas moves up and is absorbed in unit 11,12,14,16 and 18 at high pressure absorber tower.After absorbing, the main volatile component in gas is water.This gas also contains the hydrogen bromide of low concentration.Gas is exported and is left high pressure absorber by Exhaust Gas.For avoiding the corrosion in pressure-control valve 25, by Exhaust Gas F preheating in the first Exhaust Gas pre-heater 20, its temperature by Exhaust Gas is increased to higher than water dew point at least 30 Kelvins, to produce stream G.The first pre-heater 20 is located immediately on the outlet(discharge) flange of high pressure absorber.The Exhaust Gas G having heated leaves this system for further downstream by pressure-control valve 25 and as stream H.Alternatively, pre-heater 20 can be connected via carrier pipe (Fig. 2 and 3) with high pressure absorber 10.
Particularly, the reactor Exhaust Gas A that enters high pressure (HP) absorber 10 is nitrogen substantially, has the hydrogen bromide of residual oxygen, oxycarbide, methyl acetate, acetic acid, water and low concentration.In the lower wash section 11 of HP absorber 10, by methyl acetate by removing with acetic acid washing.Demister 12 reduced liquid entrainment before gas passes into upper wash section via funnel-shaped tower tray 14.In upper wash section 16, acetic acid is removed by washing with water.Demister 18 reduces liquid entrainment.The gas that leaves HP absorber 10 has concentration and reduces a lot of methyl acetates and acetic acid.The mobile change of remaining component is very little, except the flow of water increases now.Water is main volatile component now, wherein has a small amount of hydrogen bromide.Upper and lower washing section can be the material that allows any type of holding matter mass transfer, as the woven wire or the fabric filler that are provided by Sulzer or Koch Glitsch, perforated metal tower tray, Raschig ring and Pall ring.
According to the utility model, now by gas heating in heat exchanger 20 before it passes through pressure-control valve 25.Pressure-control valve 25 is controlled upstream G pressure.After gas, by downstream H, at this, further heating and catalytic treatment (not shown) of its experience, is used for being disposed to atmosphere by expander and washer afterwards.Because the gas by pressure-control valve 25 is being much higher than the temperature of water dew point, and the hydrobromic any drop in gas evaporates in heat exchanger 20 before, so valve 25 is without undergoing by hydrobromic corrosion.
Embodiment
With the prior-art devices comparison with water jet and knock-out drum, disclosed utility model can be processed at identical temperature and pressure the reactor tower top Exhaust Gas of same amount.In following table, show two typical reactor tower top Exhaust Gas flows in system: (1) has the prior-art devices of water jet and knock-out drum; (2) the utility model device.Because the utility model device is processed the Exhaust Gas flow identical with prior-art devices, but adopt the equipment of lower capital, have intrinsic capital investment saving.
。
Claims (5)
1. for minimizing the device of corrosion of rich hydrogen bromide condensate for origin automatic oxidation reaction device tower top Exhaust Gas stream, described device comprises:
High pressure absorber (10), described high pressure absorber (10) comprising:
Exhaust Gas entrance (5), described Exhaust Gas entrance (5) is suitable for being communicated with the tower top outlet fluid of oxidation reactor, for receiving described oxidation reactor tower top Exhaust Gas stream;
A series of absorbing mediums (11,12,14,16 and 18), described a series of absorbing mediums (11,12,14,16 and 18) are in described high pressure absorber inside; With
Exhaust Gas outlet, described Exhaust Gas outlet has been passed through the gaseous component of described a series of absorbing mediums (11,12,14,16 and 18) for discharge;
Exhaust Gas pre-heater (20), described Exhaust Gas pre-heater (20) is communicated with the Exhaust Gas outlet fluid of described high pressure absorber (10), the gaseous component for preheating from the described Exhaust Gas outlet of described high pressure absorber (10); With
Pressure-control valve (25), described pressure-control valve (25) is communicated with described Exhaust Gas pre-heater (20) fluid, be used for controlling the pressure of described high pressure absorber (10), wherein said pressure-control valve (25) is in the downstream of described Exhaust Gas pre-heater (20).
2. device according to claim 1, wherein said Exhaust Gas exports in described high pressure absorber inside.
3. device according to claim 1, wherein said Exhaust Gas pre-heater (20) is connected to the outlet(discharge) flange on the top of described high pressure absorber (10).
4. device according to claim 1, wherein said Exhaust Gas pre-heater (20) uses carrier pipe (22) to be connected to described high pressure absorber (10), and wherein said Exhaust Gas pre-heater (20) is vertically arranged in addition.
5. device according to claim 1, wherein said Exhaust Gas pre-heater (20) uses carrier pipe (22) to be connected to described high pressure absorber (10), and wherein said Exhaust Gas pre-heater (20) is horizontally disposed in addition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420412113.8U CN203990254U (en) | 2014-07-24 | 2014-07-24 | Be used for the device of the corrosion of the rich hydrogen bromide condensate that minimizes origin automatic oxidation reaction device tower top Exhaust Gas stream |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420412113.8U CN203990254U (en) | 2014-07-24 | 2014-07-24 | Be used for the device of the corrosion of the rich hydrogen bromide condensate that minimizes origin automatic oxidation reaction device tower top Exhaust Gas stream |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203990254U true CN203990254U (en) | 2014-12-10 |
Family
ID=52030328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420412113.8U Expired - Lifetime CN203990254U (en) | 2014-07-24 | 2014-07-24 | Be used for the device of the corrosion of the rich hydrogen bromide condensate that minimizes origin automatic oxidation reaction device tower top Exhaust Gas stream |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203990254U (en) |
-
2014
- 2014-07-24 CN CN201420412113.8U patent/CN203990254U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211021 Address after: Great Britain Patentee after: INVISTA NORTH AMERICA S.A.R.L. Address before: St Gallen Patentee before: INVISTA TECHNOLOGIES S.A.R.L. Effective date of registration: 20211021 Address after: London Patentee after: Koch technologies UK Ltd. Address before: Great Britain Patentee before: INVISTA NORTH AMERICA S.A.R.L. |