CN109990201A - A kind of catalyst and propylene online mixer anti-blockage method - Google Patents
A kind of catalyst and propylene online mixer anti-blockage method Download PDFInfo
- Publication number
- CN109990201A CN109990201A CN201910282524.7A CN201910282524A CN109990201A CN 109990201 A CN109990201 A CN 109990201A CN 201910282524 A CN201910282524 A CN 201910282524A CN 109990201 A CN109990201 A CN 109990201A
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- China
- Prior art keywords
- propylene
- catalyst
- valve
- pipeline
- online mixer
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
- B01D5/009—Collecting, removing and/or treatment of the condensate
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/34—Hydrogen distribution
-
- 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
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/45—Hydrogen technologies in production processes
Abstract
The invention discloses a kind of catalyst and propylene online mixer anti-blockage method, it is related to chemical production field, this method comprises: closing the first valve and the second valve respectively, third valve is slowly opened simultaneously, propylene, which will be rinsed, is passed directly to add the low temperature propylene condenser heat exchange on hydrogen propylene pipeline to condense, condensed propylene conveying catalyst is sent to catalyst and propylene online mixer together, wherein, it conveys catalyst and the input capillary exit of propylene online mixer is handled by caliber diminution.The propylene for entering catalyst and propylene online mixer is changed to by the present invention propylene of hydrogen is not added can weaken chemical reaction velocity when catalyst contacts in inputting capillary exit with propylene, to reduce the probability of input capillary exit blocking, the initial activity that catalyst is reduced in prepolymerization avoids catalyst from bursting apart and generates a large amount of fine powders, the fine powder content in process water outlet is reduced, environmental pollution is avoided.
Description
Technical field
The present invention relates to chemical production field more particularly to a kind of catalyst and propylene online mixer anti-blockage method.
Background technique
In existing loop technology polypropylene plant design, by being used to convey catalyst after the cooling of low temperature propylene condenser
The propylene of (ziegler-natta catalyst systems) is all the propylene after hydrogenation, conveys catalysis using the propylene of hydrogenation
Catalyst online mixer (catalyst and propylene online mixer) blocking is easily led to when agent, the propylene for secondly adding hydrogen amount big is pre-
It is easy to cause major catalyst to burst apart in polymerization process, causes product fine powder content superelevation, exist to further plug catalyst
Line mixer, once blocking, major catalyst and co-catalyst will all interrupt at least 20 minutes or so, to polypropylene product quality
Stability seriously affects.
Secondly the propylene for adding hydrogen amount big is easy to cause major catalyst to burst apart in pre-polymerization process, causes product fine powder content
Superelevation, clog downstream equipment or causes environmental pollution, increases device propylene unit consumption.
Summary of the invention
In order to overcome the shortcomings of Related product in the prior art, the present invention proposes a kind of catalyst and propylene online mixer
Anti-blockage method solves the problems, such as that existing catalyst and propylene online mixer are easy blocking.
The present invention provides a kind of catalyst and propylene online mixer anti-blockage method, comprising: is rinsing propylene pipeline
The first valve of upper setting, sets gradually the second valve and low temperature propylene condenser on adding hydrogen propylene pipeline, is rinsing propylene
Pipeline and add setting conducting between hydrogen propylene pipeline that pipeline and third valve is set, wherein the entrance position of the conducting pipeline
Before the first valve, the outlet of the conducting pipeline is located at after the second valve；The first valve and the second valve are closed respectively,
Third valve is slowly opened simultaneously, will be rinsed propylene and is passed directly to add the low temperature propylene condenser heat exchange on hydrogen propylene pipeline cold
It is solidifying, condensed propylene conveying catalyst is sent to catalyst and propylene online mixer together, wherein conveying catalyst and
The input capillary exit of propylene online mixer is handled by caliber diminution.
In some embodiments of the present invention, after the low temperature propylene condenser carries out heat exchange condensation to flushing propylene,
The temperature of the flushing propylene reduced is 10 DEG C.
In some embodiments of the present invention, the input capillary exit reduces treated catalyst stream by caliber
Speed is not less than 0.07 meter per second, and propylene flow velocity is not less than 1 meter per second.
Compared with prior art, the present invention has the following advantages:
Catalyst described in the embodiment of the present invention and propylene online mixer anti-blockage method will exist into catalyst and propylene
The propylene of line mixer be changed to be not added hydrogen propylene can weaken catalyst input capillary exit in contacted with propylene when
Chemical reaction velocity, so that the probability of input capillary exit blocking is reduced, ensuring equipment long-period stable operation and raising device
Product quality, the initial activity that catalyst is reduced in prepolymerization avoid catalyst from bursting apart and generate a large amount of fine powders, reduce by 500 works
Fine powder content in segment process water outlet, avoids environmental pollution.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the flow diagram of catalyst of the present invention and propylene online mixer anti-blockage method；
Fig. 2 is catalyst of the present invention and propylene online mixer process schematic representation.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment is only
A part of the embodiment of the present invention, instead of all the embodiments, following present presently preferred embodiments of the present invention.The present invention can be with
It realizes in many different forms, however it is not limited to embodiment described herein, on the contrary, provide the purpose of these embodiments
It is to make the disclosure of the present invention more thorough and comprehensive.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.The phrase occurs in each position in the description might not
Identical embodiment is each meant, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art
Member explicitly and implicitly understands that embodiment described herein can be combined with other embodiments.
Refering to fig. 1 and shown in Fig. 2, the catalyst includes the following steps: with propylene online mixer anti-blockage method
S101: the first valve V1 is set on rinsing propylene pipeline, sets gradually the second valve on adding hydrogen propylene pipeline
V2 and low temperature propylene condenser E201 in flushing propylene pipeline and adds setting conducting pipeline between hydrogen propylene pipeline and is arranged
Third valve V3, wherein the entrance of the conducting pipeline is located at before the first valve V1, and the outlet of the conducting pipeline is positioned at the
After two valve V2.
S102: the first valve V1 and the second valve V2 are closed respectively, while slowly opening third valve V3, will rinse propylene
It is passed directly to add the low temperature propylene condenser E201 heat exchange condensation on hydrogen propylene pipeline, condensed propylene is conveyed into catalyst
It is sent to catalyst and propylene online mixer together, wherein the input capillary of conveying catalyst and propylene online mixer
Mouth is handled by caliber diminution.
After closing the first valve V1, third valve V3 is slowly opened, the second valve V2 is finally closed, so that hydrogen third will be added
Alkene is adjusted to the propylene of not hydrogenation.
Since in the presence of having hydrogen in the propylene for entering catalyst and propylene online mixer, chain growth constant is improved
, the increase of propagationrate constant and " suspend mode " center are reactivated related by chain tra nsfer, and first monomer is inserted to Ti-H key
" suspend mode " center formed after entering can be also re-activated by hydrogen.Meanwhile by reducing caliber, increase the flow velocity of the two, as far as possible
Ground reduces the catalyst with greater activity center in the input capillary exit of catalyst and propylene online mixer with third
The time of contact of alkene reduces the probability of blocking, for example, the caliber of the input capillary exit is big by taking 70,000 tons of process units as an example
Small is 1/8 cun, is promoted to 200,000 ton hours in device, and the pipe diameter size of the corresponding input capillary exit is 1/4 cun, keeps catalysis
Agent flow velocity is not less than 0.07 meter per second, and propylene flow velocity is not less than 1 meter per second, catalyst is reduced in the case where not affecting the normal production
Time of contact in catalyst and the input capillary exit of propylene online mixer with propylene.In embodiments of the present invention, institute
Low temperature propylene condenser E201 is stated to rinsing after propylene carries out heat exchange condensation, the temperature of the flushing propylene reduced is 10 DEG C, is led to
It crosses and catalyst is sent into catalyst and propylene online mixer using the cold propylene of not hydrogen, further reduce input hair
Chemical reaction velocity when catalyst and propylene contact in tubule mouth, to reach the probability for reducing input capillary exit blocking.
Catalyst described in the embodiment of the present invention and propylene online mixer anti-blockage method will exist into catalyst and propylene
The propylene of line mixer be changed to be not added hydrogen propylene can weaken catalyst input capillary exit in contacted with propylene when
Chemical reaction velocity, so that the probability of input capillary exit blocking is reduced, ensuring equipment long-period stable operation and raising device
Product quality, the initial activity that catalyst is reduced in prepolymerization avoid catalyst from bursting apart and generate a large amount of fine powders, reduce by 500 works
Fine powder content in segment process water outlet, avoids environmental pollution.
The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.More than
Only the embodiment of the present invention is not intended to limit the scope of the patents of the invention, although carrying out with reference to the foregoing embodiments to the present invention
Detailed description still can be to recorded in aforementioned each specific embodiment for coming for those skilled in the art
Technical solution modify, or to part of technical characteristic carry out equivalence replacement.It is all to utilize in description of the invention
Hold done equivalence replacement, be directly or indirectly used in other related technical areas, similarly protects model in the invention patent
Within enclosing.
Claims (3)
1. a kind of catalyst and propylene online mixer anti-blockage method characterized by comprising
The first valve is set on rinsing propylene pipeline, the second valve and low temperature propylene are set gradually on adding hydrogen propylene pipeline
Condenser in flushing propylene pipeline and adds setting conducting pipeline between hydrogen propylene pipeline and third valve is arranged, wherein is described
The entrance of conducting pipeline is located at before the first valve, and the outlet of the conducting pipeline is located at after the second valve；
The first valve and the second valve are closed respectively, while slowly opening third valve, will be rinsed propylene and are passed directly to add hydrogen
Low temperature propylene condenser on propylene pipeline exchanges heat condensation, by condensed propylene conveying catalyst be sent to together catalyst with
Propylene online mixer, wherein conveying catalyst and the input capillary exit of propylene online mixer are handled by caliber diminution.
2. catalyst according to claim 1 and propylene online mixer anti-blockage method, it is characterised in that: the low temperature
After propylene condenser carries out heat exchange condensation to flushing propylene, the temperature of the flushing propylene reduced is 10 DEG C.
3. catalyst according to claim 1 and propylene online mixer anti-blockage method, it is characterised in that: the input
Capillary exit reduces treated rate of catalyst flow by caliber and is not less than 0.07 meter per second, and propylene flow velocity is not less than 1 meter per second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910282524.7A CN109990201B (en) | 2019-04-10 | 2019-04-10 | Catalyst and propylene on-line mixer anti-blocking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910282524.7A CN109990201B (en) | 2019-04-10 | 2019-04-10 | Catalyst and propylene on-line mixer anti-blocking method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109990201A true CN109990201A (en) | 2019-07-09 |
| CN109990201B CN109990201B (en) | 2021-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910282524.7A Active CN109990201B (en) | 2019-04-10 | 2019-04-10 | Catalyst and propylene on-line mixer anti-blocking method |
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Citations (4)
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|---|---|---|---|---|
| CN202746946U (en) * | 2012-08-17 | 2013-02-20 | 浙江天河铜业股份有限公司 | Reserved pipeline system for cooling water |
| CN204220558U (en) * | 2014-11-02 | 2015-03-25 | 中冶东方工程技术有限公司 | The online purging system of oxygen regulating valve group |
| CN207357120U (en) * | 2017-10-24 | 2018-05-15 | 浙江美福石油化工有限责任公司 | A kind of freshening device that propylene is prepared by weight virtue after being hydrogenated with |
| CN207716096U (en) * | 2017-11-28 | 2018-08-10 | 玖龙纸业（东莞）有限公司 | A kind of structure improved pump group part |
-
2019
- 2019-04-10 CN CN201910282524.7A patent/CN109990201B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202746946U (en) * | 2012-08-17 | 2013-02-20 | 浙江天河铜业股份有限公司 | Reserved pipeline system for cooling water |
| CN204220558U (en) * | 2014-11-02 | 2015-03-25 | 中冶东方工程技术有限公司 | The online purging system of oxygen regulating valve group |
| CN207357120U (en) * | 2017-10-24 | 2018-05-15 | 浙江美福石油化工有限责任公司 | A kind of freshening device that propylene is prepared by weight virtue after being hydrogenated with |
| CN207716096U (en) * | 2017-11-28 | 2018-08-10 | 玖龙纸业（东莞）有限公司 | A kind of structure improved pump group part |
Non-Patent Citations (2)
| Title |
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| 刘星等: "《有效降低聚丙烯装置细粉产量的方法及措施》", 《石油化工》 * |
| 胡军武: "《国产化单环管液相本体法聚丙烯装置的建模和模拟研究》", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
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| CN109990201B (en) | 2021-05-11 |
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