CN109675509A - A kind of esterification column enhancing corrosion resistance - Google Patents
A kind of esterification column enhancing corrosion resistance Download PDFInfo
- Publication number
- CN109675509A CN109675509A CN201811641015.0A CN201811641015A CN109675509A CN 109675509 A CN109675509 A CN 109675509A CN 201811641015 A CN201811641015 A CN 201811641015A CN 109675509 A CN109675509 A CN 109675509A
- Authority
- CN
- China
- Prior art keywords
- end socket
- metal plate
- cylinder
- corrosion resistance
- esterification column
- 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.)
- Pending
Links
- 230000007797 corrosion Effects 0.000 title claims abstract description 33
- 238000005260 corrosion Methods 0.000 title claims abstract description 33
- 230000032050 esterification Effects 0.000 title claims abstract description 25
- 238000005886 esterification reaction Methods 0.000 title claims abstract description 25
- 230000002708 enhancing effect Effects 0.000 title claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 28
- 239000002184 metal Substances 0.000 claims abstract description 28
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000006073 displacement reaction Methods 0.000 claims abstract description 7
- 229910052786 argon Inorganic materials 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 18
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 14
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 9
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 125000004494 ethyl ester group Chemical group 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000006396 nitration reaction Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241001269238 Data Species 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910001080 W alloy Inorganic materials 0.000 description 1
- XJNCHICLWKVTQA-UHFFFAOYSA-N [Mo].[W].[Cr].[Ni] Chemical compound [Mo].[W].[Cr].[Ni] XJNCHICLWKVTQA-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/02—Apparatus characterised by being constructed of material selected for its chemically-resistant properties
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/08—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a kind of esterification columns for enhancing corrosion resistance, including cylinder and end socket, end socket, and the bottom of cylinder is arranged in, cylinder and end socket weld together, splicing has muti-piece metal plate on end socket in cylinder, and metal plate is welded on end socket with argon arc welding mode, has the fissure of displacement between the metal plate.By in cylinder splice have muti-piece metal plate on end socket, improve the Corrosion Protection of esterification column end socket, ensure that device long-period stable operation, moreover it is possible to reduce energy consumption, reduce environmental protection pressure, production it is safer.
Description
Technical field
The invention belongs to esterification column equipment technical field, especially a kind of esterification column for enhancing corrosion resistance.
Background technique
Current ethyl acetate production technology is as follows: raw materials for production are excessive acetic acid and ethyl alcohol, in the catalyst concentrated sulfuric acid
Under effect, under the conditions of certain temperature and pressure, ethyl ester is synthesized in esterifying kettle, subsequently into esterification column carry out rectifying,
Split-phase, finally, obtaining qualified ethyl acetate product by a series of subtractive processes such as extraction, concentrate, rectifying.The technique due to
Catalyst is done using the concentrated sulfuric acid, more serious to equipment corrosion, especially esterification column lower head (material 316L) corrosion is more tight
Weight, this corrosion have following influence to device: 1, equipment corrosion leakage causes scram, influences the operation of device steady and continuous；
2, equipment and sulfuric acid reaction cause sulfuric acid to inactivate, and conversion ratio is caused to reduce, and draw material in advance, and the cycle of operation shortens；3, corrosion leakage
Smell diffusion, the increase of waste residue, waste water are influenced, unfavorable to environmental protection, it is unfavorable to keeping the safety in production that maintenance number increases, in addition improper
Parking also will affect various aspects consumption.
Summary of the invention
It is an object of the invention to overcoming the technical problem present on, provides and a kind of have good corrosion performance
Esterification column.
To achieve the above object, the present invention adopts the following technical scheme that:
The bottom of cylinder, cylinder and end socket weldering is arranged in a kind of esterification column enhancing corrosion resistance, including cylinder and end socket, end socket
It is connected together, splicing has muti-piece metal plate on end socket in cylinder, and metal plate is welded on end socket with argon arc welding mode, described
There is the fissure of displacement between metal plate.
Further, the material of the metal plate is C276 metal plate, with a thickness of 1.5mm.
Further, the width of the fissure of displacement is 10mm.
Further, the diameter of the cylinder is 2.2m.
Further, the material of the end socket is 316L stainless steel material, with a thickness of 10mm.
The invention has the following advantages: having muti-piece metal plate on end socket by splicing in cylinder, ester is improved
The Corrosion Protection for changing tower end socket, ensures that the long-period stable operation of ethyl ester process units, moreover it is possible to reduce energy consumption, reduce
Environmental protection pressure, production are safer.
Detailed description of the invention
A kind of Fig. 1: structural schematic diagram for the esterification column for enhancing corrosion resistance of the present invention.
Fig. 2: the structural schematic diagram of metal plate splicing.
Label declaration:
1: cylinder；2: end socket；3: metal plate；4: the fissure of displacement.
Specific embodiment
With reference to the accompanying drawing and embodiment the present invention is described in detail.
Embodiment one:
As shown in Figs. 1-2, a kind of esterification column enhancing corrosion resistance, mainly for the production of ethyl acetate, including cylinder 1 and end socket
2, the diameter of cylinder 1 is 2.2m, and the bottom of cylinder 1 is arranged in end socket 2, and the material of the end socket 2 is 316L stainless steel material,
It welds together with a thickness of 10mm, cylinder 1 and end socket 2.Because using concentrated sulfuric acid catalyst in production, and temperature is relatively
Height, so end socket 2 is the most severe most perishable region of environment in entire esterification column, if corrosion leakage, will lead to esterification is
System parking influences yield, consumption, and cleaning waste water is generated in maintenance, brings certain pressure to environmental protection.Therefore in cylinder 1
Splicing has muti-piece C276 metal plate 3 on end socket 2, and C276 metal plate 3 is welded on end socket 2 with argon arc welding mode, same with this
When, have the fissure of displacement 4 of 10mm wide between C276 metal plate 3, C276 metal plate 3 with a thickness of 1.5mm.Present invention 10mm thickness
The end socket 2 of 316L stainless steel material maintains the intensity load of entire esterification column, guarantees envelope with the C276 metal plate 3 of 1.5mm thickness
First 2 corrosion resistance performance, by test, after C276 metal plate 3, the corrosion resistance of esterification column is obviously mentioned
It is high.C276 metal plate 3 is a kind of nickel molybdenum chromium tungsten alloy, has excellent corrosion resistance and good forging performance, is suitable for
The corrosive environments such as inorganic acid, organic/inorganic chlorine pollution medium, sulfuric acid and oxidisability salt, acetic acid, are resistant to pitting corrosion, and gap is rotten
Erosion, stress corrosion cracking.The various corrosion datas of 3 alloy of C276 metal plate have its typicalness, but are not useful as standardizing,
Especially in unknown environment, it is necessary to just can be with selection through overtesting.There is no enough Cr to come in 3 alloy of C276 metal plate resistance to
The corrosion of strong oxidizing property environment, such as concentrated nitric acid of heat, the generation of this alloy are especially deposited primarily directed to chemical process environment
It is inferior the nitration mixture the case where, and it is suitable for the sulfuric acid solution of various concentration, it is that a few can apply to hot concentrated sulfuric acid solution
One of material.In ethyl ester process units, because of two kinds of sulfuric acid, acetic acid sour presence, the apparatus body of 316L material is corroded
Property is stronger, therefore the excellent in performance of the Sulfate corrosion resistance of C276 metal plate 3, preferable to compensate for the defect, solves esterification
Equipment etching problem under in the corrosive environment of tower harshness.
Firstly, the Comparison on Corrosion experiment We conducted four kinds of materials under the identical environment of esterification tower bottom, by various materials
The metal lacing film of matter is placed on esterification tower bottom, studies the corrosive nature of respective anti-material medium, as a result as follows:
Experimental data shows that original equipment ontology material is 316L, and half a year corrosion rate is 6.2%, and the corrosion rate of C276 material
Almost 0, it can be neglected, can preferably meet the corrosion resistance in esterification column under the adverse circumstances of nitration mixture.
Finally, it should be noted that above embodiments are only to illustrate the present invention and not limit technology described in the invention
Scheme；Therefore, although this specification is referring to above-mentioned each embodiment, the present invention has been described in detail, this
Field it is to be appreciated by one skilled in the art that still can modify to the present invention or equivalent replacement；And all do not depart from this
The technical solution and its improvement of the spirit and scope of invention, should all cover within the scope of the claims of the present invention.
Claims (5)
1. a kind of esterification column for enhancing corrosion resistance, including cylinder (1) and end socket (2), end socket (2) are arranged in cylinder (1)
Bottom, cylinder (1) and end socket (2) weld together, it is characterised in that: splicing has muti-piece metal plate (3) sealing in cylinder (1)
On head (2), and metal plate (3) is welded on end socket (2) with argon arc welding mode, has the fissure of displacement (4) between the metal plate (3).
2. a kind of esterification column for enhancing corrosion resistance according to claim 1, it is characterised in that: the metal plate (3)
Material is C276 metal plate, with a thickness of 1.5mm.
3. a kind of esterification column for enhancing corrosion resistance according to claim 1, it is characterised in that: the width of the fissure of displacement (4)
Degree is 10mm.
4. it is according to claim 1 it is a kind of enhance corrosion resistance esterification column, it is characterised in that: the cylinder (1) it is straight
Diameter is 2.2m.
5. a kind of esterification column for enhancing corrosion resistance according to claim 1, it is characterised in that: the end socket (2)
Material is 316L stainless steel material, with a thickness of 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811641015.0A CN109675509A (en) | 2018-12-29 | 2018-12-29 | A kind of esterification column enhancing corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811641015.0A CN109675509A (en) | 2018-12-29 | 2018-12-29 | A kind of esterification column enhancing corrosion resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109675509A true CN109675509A (en) | 2019-04-26 |
Family
ID=66191297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811641015.0A Pending CN109675509A (en) | 2018-12-29 | 2018-12-29 | A kind of esterification column enhancing corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109675509A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201454364U (en) * | 2009-08-19 | 2010-05-12 | 中电投远达环保工程有限公司 | Combined flue gas desulfurization absorption tower with enhanced corrosion resistant performance |
| CN102151523A (en) * | 2011-03-14 | 2011-08-17 | 高玉玲 | Aromatization reactor |
| CN202590750U (en) * | 2012-04-26 | 2012-12-12 | 苏州市金翔钛设备有限公司 | Esterification reactor |
| CN203333630U (en) * | 2013-05-29 | 2013-12-11 | 深圳市腾浪再生资源发展有限公司 | Esterification column for producing biodiesel from waste grease by gas phase alcoholysis |
| CN204710063U (en) * | 2015-04-03 | 2015-10-21 | 浙江金氟隆化工装备有限公司 | High rigid liner tower body |
| CN205379700U (en) * | 2016-01-27 | 2016-07-13 | 刘晓静 | Novel fibre ball filter |
| CN106277184A (en) * | 2015-05-12 | 2017-01-04 | 中广核工程有限公司 | High flow rate is pressed ion-exchange unit |
| CN206653085U (en) * | 2017-03-09 | 2017-11-21 | 兖矿鲁南化工有限公司 | A kind of reactor of methyl acetate liquid-phase carbonylation synthesis aceticanhydride |
-
2018
- 2018-12-29 CN CN201811641015.0A patent/CN109675509A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201454364U (en) * | 2009-08-19 | 2010-05-12 | 中电投远达环保工程有限公司 | Combined flue gas desulfurization absorption tower with enhanced corrosion resistant performance |
| CN102151523A (en) * | 2011-03-14 | 2011-08-17 | 高玉玲 | Aromatization reactor |
| CN202590750U (en) * | 2012-04-26 | 2012-12-12 | 苏州市金翔钛设备有限公司 | Esterification reactor |
| CN203333630U (en) * | 2013-05-29 | 2013-12-11 | 深圳市腾浪再生资源发展有限公司 | Esterification column for producing biodiesel from waste grease by gas phase alcoholysis |
| CN204710063U (en) * | 2015-04-03 | 2015-10-21 | 浙江金氟隆化工装备有限公司 | High rigid liner tower body |
| CN106277184A (en) * | 2015-05-12 | 2017-01-04 | 中广核工程有限公司 | High flow rate is pressed ion-exchange unit |
| CN205379700U (en) * | 2016-01-27 | 2016-07-13 | 刘晓静 | Novel fibre ball filter |
| CN206653085U (en) * | 2017-03-09 | 2017-11-21 | 兖矿鲁南化工有限公司 | A kind of reactor of methyl acetate liquid-phase carbonylation synthesis aceticanhydride |
Non-Patent Citations (1)
| Title |
|---|
| 孙克勤: "《电厂烟气脱硫设备及运行》", 30 April 2007, 中国电力出版社 * |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20191231 Address after: 212006 No. 88 Qiusuo Road, Jingkou District, Zhenjiang City, Jiangsu Province Applicant after: Jiangsu Sopo Chemical Co.,Ltd. Applicant after: Jiangsu Thorpe Engineering Technology Co., Ltd. Address before: No. 101, Jingkou Road, Zhenjiang, Jiangsu, Jiangsu Applicant before: Jiangsu Soap (Group) Co., Ltd. Applicant before: Jiangsu Thorpe Engineering Technology Co., Ltd. |
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| TA01 | Transfer of patent application right | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190426 |
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| RJ01 | Rejection of invention patent application after publication |