CN205275504U - Charge -in system of polypropylene catalyst - Google Patents
Charge -in system of polypropylene catalyst Download PDFInfo
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- CN205275504U CN205275504U CN201521053512.0U CN201521053512U CN205275504U CN 205275504 U CN205275504 U CN 205275504U CN 201521053512 U CN201521053512 U CN 201521053512U CN 205275504 U CN205275504 U CN 205275504U
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- catalyst
- suspension
- metering pump
- diaphragm metering
- charge pipe
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- 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
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
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Abstract
The utility model discloses a charge -in system of polypropylene catalyst, prepare a jar and a feeding unit including suspension, suspension is prepared the jar and is used for disposing catalyst suspension, a feeding unit includes metering tank, circulating pump and catalyst feed tube, a feeding unit still includes the diaphragm metering pump, the diaphragm metering pump set up in catalyst feed tube is last. The utility model discloses a charge -in system has set up the diaphragm metering pump on catalyst feed tube, be favorable to further adjusting and controlling the feeding of catalyst to through the propelling movement of diaphragm metering pump, make polypropylene catalyst suspension feed rate stable, help the reactor operation steady, improve product quality stability, reduced the condition that catalyst suspension feed pipeline blockked up.
Description
Technical field
This utility model relates to the catalyst charge mode in propylene polymerization, particularly relates to the feed system of a kind of polypropylene catalyst.
Background technology
In the continuous flow procedure of gas-phase polymerization polypropylene device, catalyst for polymerization of propylene typically need to be configured to suspension, for instance with propylene mixed preparing suspension, add in propene polymerization reactor, in order to mix homogeneously in the reactor. For Fig. 1, the feed system of traditional polypropylene catalyst being illustrated, pulverous catalyst charge mixes with propylene (or other alkane) in suspension preparation tank 11, and is configured to suspension under the effect of agitator in tank. Suspension preparation tank 11 is after high pressure nitrogen pressurizes, and the suspension in tank enters in measuring tank 12, and catalyst suspension agitator continuous stirring in measuring tank 12 desirably prevents catalyst sedimentation. Meanwhile, catalyst suspension circulating reflux in measuring tank 12 is made by circulating pump 13, it is ensured that catalyst is suspension in closed circuit flows, it is prevented that catalyst sedimentation. While suspension refluxes, a part of catalyst suspension continues through threeway metering valve 14 and controls to be fed in polymer reactor, thus realizing the charging of polypropylene catalyst.
But, in actual moving process, owing to catalyst is pressed powder, the suspension being configured to propylene (or other alkane) easily settles. Along with being incremented by of time of delivery, partially catalyzed agent powder can be accumulated in pipeline, catalyst charge amount is caused ceaselessly to fluctuate in a big way, time often result in the blocking of catalyst charge pipe 16, threeway metering valve 14 and effusion meter 15, cause polymer reactor temperature fluctuation, polymer reactor hot-spot can be made time serious to produce caking, the normal operation of device is produced significant impact.
Therefore, it is necessary to the feed system of catalyst is improved, to ensure that what produce is normally carried out.
Summary of the invention
The purpose of this utility model is in that to provide the feed system of a kind of polypropylene catalyst, with the problem solving the catalyst charge instability of propene polymerization reactor in prior art.
For achieving the above object, this utility model is by the following technical solutions:
A kind of feed system of polypropylene catalyst, including suspension preparation tank and the first feed unit, described suspension preparation tank is used for configuring catalyst suspension;
Described first feed unit includes measuring tank, circulating pump and catalyst charge pipe; The charging aperture of described measuring tank is connected to the discharging opening of described suspension preparation tank, to receive the suspension from described suspension preparation tank; The charging aperture of described circulating pump is connected to the discharging opening of described measuring tank, and the discharging opening of described circulating pump is respectively connecting to measuring tank and catalyst charge pipe; Described catalyst charge pipe is for sending catalyst suspension into propene polymerization reactor; Wherein, described first feed unit also includes diaphragm metering pump, and described diaphragm metering pump is arranged on described catalyst charge pipe.
According to feed system of the present utility model, it is preferable that described diaphragm metering pump is stroke adjustable diaphragm metering pump.
According to feed system of the present utility model, it is preferable that described first feed unit also includes frequency conversion motor, it is used for driving described diaphragm metering pump.
According to feed system of the present utility model, it is preferable that described first feed unit also includes effusion meter, described effusion meter is arranged on the catalyst charge pipe of described diaphragm metering pump outlet side.
According to feed system of the present utility model, it is preferable that described feed system also includes the second feed unit, and described second feed unit and the first feed unit are arranged in parallel, and structure is identical.
According to feed system of the present utility model, it is preferable that the internal diameter of described catalyst charge pipe is 0.5��1.5cm.
According to feed system of the present utility model, it is preferable that the internal diameter of described catalyst charge pipe is 0.8��1.2cm.
Compared with prior art, feed system of the present utility model is provided with diaphragm metering pump on catalyst charge pipe, be conducive to further the charging of catalyst being adjusted and controlling, and by the propelling movement of diaphragm metering pump, make polypropylene catalyst suspension feed rate stable, contribute to reactor smooth operation, improve product quality stability, decrease the situation of catalyst suspension feeding line blocking, thus decrease the waste of catalyst and reduce the labor intensity of operator, producing continuously of polypropylene plant is significant. It addition, by the caliber adjusting catalyst charge pipe further, be likewise advantageous to avoid the frequent jams of pipeline, be conducive to the long-term operation of device.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing catalyst feed systems;
Fig. 2 is the schematic diagram of a kind of embodiment of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is illustrated, but this utility model is not limited to that.
As in figure 2 it is shown, feed system of the present utility model includes suspension preparation tank 21 and the first feed unit 1. Wherein, described suspension preparation tank 21 is used for configuring catalyst suspension, such as grained catalyst and propylene are configured to suspension, it is added in propene polymerization reactor with being more uniformly distributed so that catalyst is known, thus, the structure of described suspension preparation tank 21 can be well-known to those skilled in the art those, for instance be provided with churned mechanically preparing tank, or also it is further provided with the preparing tank of Matter Transfer, repeats no more here.
Described first feed unit 1 is mainly used in receiving the catalyst suspension from described suspension preparation tank 21, and is sent in propene polymerization reactor. Described first feed unit 1 includes measuring tank 22, circulating pump 23, catalyst charge pipe 26 and diaphragm metering pump 24; Wherein, the charging aperture of described measuring tank 22 is connected to the discharging opening of described suspension preparation tank 21, to receive the suspension from described suspension preparation tank 21; The charging aperture of described circulating pump 23 is connected to the discharging opening of described measuring tank 22, the discharging opening of described circulating pump 23 is respectively connecting to measuring tank 22 and catalyst charge pipe 26, with the Matter Transfer carried out respectively in measuring tank 22 with provide catalyst suspension to described catalyst charge pipe 26; Skilled artisan understands that, by making the Matter Transfer in measuring tank 22, can be conducive to keeping the even suspension of catalyst, certainly, in order to be conducive to further mix homogeneously, can also arranging mechanical agitation in described measuring tank 22, this is that those skilled in the art are readily apparent that, repeats no more here.
Described catalyst charge pipe 26 is for sending catalyst suspension into propene polymerization reactor; Described diaphragm metering pump 24 is arranged on described catalyst charge pipe 26, to push the catalyst suspension of catalyst charge pipe 26 further, conveying effect due to diaphragm metering pump 24, make polypropylene catalyst suspension feed rate stable, contribute to reactor smooth operation, improve product quality stability, decrease the situation of catalyst suspension feed pipe 26 line blocking. Preferably, described diaphragm metering pump 24 is stroke adjustable diaphragm metering pump, is conducive to further the charging of catalyst being adjusted and controlling; It is further preferred that described first feed unit also includes frequency conversion motor (not shown), it is used for driving described diaphragm metering pump 24.
In order to reduce pipeline blocking probability further, through repeatedly testing, the internal diameter of described catalyst charge pipe 26 is preferably 0.5��1.5cm; More preferably 0.8��1.2cm.
In one embodiment, described first feed unit also includes effusion meter 25, and described effusion meter 25 is arranged on the catalyst charge pipe 26 of described diaphragm metering pump 24 outlet side, to monitor the output flow of described diaphragm metering pump 24 further.
In a preferred embodiment, described feed system also includes the second feed unit 2, described second feed unit 2 and the first feed unit 1 are arranged in parallel, and structure is identical, thus being difficult to properly functioning for some reason in the first feed unit 1, the second feed unit 2 can be switched in time, it is ensured that produce and be normally carried out.
As in figure 2 it is shown, when feed system of the present utility model runs, catalyst fines and liquid propylene (or other alkane) are configured to certain density catalyst suspension in proportion in catalyst preparation tank 21. Suspension is in catalyst preparation tank 21 after stirring after a while, and the discharging opening opening preparing tank makes catalyst suspension flow in measuring tank 22. In measuring tank 22, prevent the sedimentation of catalyst fines by stirring and 23 dozens of circulations of circulating pump further, it is ensured that catalyst suspension is uniform. When needs are to propene polymerization reactor charging, start the diaphragm metering pump 24 on catalyst charge pipe 26, accurately control the catalyst suspension inlet amount to reactor by the rotating speed of Field adjustment throw of pump and frequency conversion motor. Through production inspection, catalyst suspension goes the feed rate of propene polymerization reactor substantially to stablize.
Last it is noted that above example is only in order to illustrate the technical solution of the utility model, it is not intended to limit; Although this utility model being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent replacement; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of this utility model.
Claims (7)
1. a feed system for polypropylene catalyst, including suspension preparation tank and the first feed unit, described suspension preparation tank is used for configuring catalyst suspension;
Described first feed unit includes measuring tank, circulating pump and catalyst charge pipe; The charging aperture of described measuring tank is connected to the discharging opening of described suspension preparation tank, to receive the suspension from described suspension preparation tank; The charging aperture of described circulating pump is connected to the discharging opening of described measuring tank, and the discharging opening of described circulating pump is respectively connecting to measuring tank and catalyst charge pipe; Described catalyst charge pipe is for sending catalyst suspension into propene polymerization reactor;
It is characterized in that, described first feed unit also includes diaphragm metering pump, and described diaphragm metering pump is arranged on described catalyst charge pipe.
2. feed system according to claim 1, it is characterised in that described diaphragm metering pump is stroke adjustable diaphragm metering pump.
3. feed system according to claim 2, it is characterised in that described first feed unit also includes frequency conversion motor, is used for driving described diaphragm metering pump.
4. feed system according to claim 3, it is characterised in that described first feed unit also includes effusion meter, and described effusion meter is arranged on the catalyst charge pipe of described diaphragm metering pump outlet side.
5. the feed system according to any one of claim 1-4, it is characterised in that described feed system also includes the second feed unit, and described second feed unit and the first feed unit are arranged in parallel, and structure is identical.
6. feed system according to claim 5, it is characterised in that the internal diameter of described catalyst charge pipe is 0.5��1.5cm.
7. feed system according to claim 6, it is characterised in that the internal diameter of described catalyst charge pipe is 0.8��1.2cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521053512.0U CN205275504U (en) | 2015-12-16 | 2015-12-16 | Charge -in system of polypropylene catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521053512.0U CN205275504U (en) | 2015-12-16 | 2015-12-16 | Charge -in system of polypropylene catalyst |
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| Publication Number | Publication Date |
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| CN205275504U true CN205275504U (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521053512.0U Active CN205275504U (en) | 2015-12-16 | 2015-12-16 | Charge -in system of polypropylene catalyst |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018193031A1 (en) * | 2017-04-19 | 2018-10-25 | Ashe Morris Ltd | Method and apparatus for handling slurries in flow systems |
| CN115703055A (en) * | 2021-08-17 | 2023-02-17 | 中国石油天然气股份有限公司 | Feeding method and feeding system of propylene polymerization catalyst, polypropylene and preparation method thereof |
| CN117942863A (en) * | 2024-03-27 | 2024-04-30 | 天津市集散聚合科技有限公司 | Catalyst mixing and filling equipment for polypropylene production and process thereof |
-
2015
- 2015-12-16 CN CN201521053512.0U patent/CN205275504U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018193031A1 (en) * | 2017-04-19 | 2018-10-25 | Ashe Morris Ltd | Method and apparatus for handling slurries in flow systems |
| CN115703055A (en) * | 2021-08-17 | 2023-02-17 | 中国石油天然气股份有限公司 | Feeding method and feeding system of propylene polymerization catalyst, polypropylene and preparation method thereof |
| CN117942863A (en) * | 2024-03-27 | 2024-04-30 | 天津市集散聚合科技有限公司 | Catalyst mixing and filling equipment for polypropylene production and process thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |