CN212263202U - Experimental equipment for discharging polyethylene slurry - Google Patents
Experimental equipment for discharging polyethylene slurry Download PDFInfo
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- CN212263202U CN212263202U CN202021743020.5U CN202021743020U CN212263202U CN 212263202 U CN212263202 U CN 212263202U CN 202021743020 U CN202021743020 U CN 202021743020U CN 212263202 U CN212263202 U CN 212263202U
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Abstract
The utility model relates to an experimental facilities for polyethylene thick liquid ejection of compact, include: a polymerization reaction kettle for storing polyethylene slurry; the discharge tank is connected with the polymerization reaction kettle through a feed pipe, and a first valve is arranged on the feed pipe; the discharge tank is connected with the flash tank through a discharge pipe, and a second valve is arranged on the discharge pipe; wherein, one end of the feeding pipe and one end of the discharging pipe, which are far away from the polymerization reaction kettle, both extend downwards in an inclined way; when the first valve is opened, the polymerization reaction kettle conveys polyethylene slurry to the discharge tank under the action of pressure difference or/and liquid level difference; when the second valve is opened, the discharge tank conveys polyethylene slurry into the flash tank under the action of pressure difference or/and liquid level difference. The utility model discloses a set up out the tank between first valve and second valve, utilize the break-make that switches first valve and second valve, carry out the liquid filling flowing back circulation operation to the play tank, can realize the interior thick liquid continuous discharging of reation kettle.
Description
Technical Field
The utility model relates to a polyethylene technical field, concretely relates to polyethylene reation kettle thick liquid ejection of compact experimental facilities of polyethylene continuous reaction test device.
Background
The test device is mainly used for developing the development work in series front-edge fields such as catalyst research and development and the like while bearing the development of high-end product technology, and improving the research and development progress. Usually, the operation conditions (such as temperature, pressure, flow, liquid level, etc.) of the test device are matched with those of the production device, but due to the particularity (such as the proportional reduction of the flow), some instruments cannot be selected or used, so that some new control modes and modes need to be developed.
Polyethylene reactor slurry discharging equipment of a polyethylene continuous reaction device, wherein the polyethylene reactor slurry contains about 30% (mass fraction) of polyethylene powder, the particle diameter distribution is 100-500 μm and accounts for 85%, if a test device is controlled by a discharging mode in an industrial production device, in order to prevent solid particles in the slurry from settling, a certain flow rate needs to be met, so that the pipe diameter is relatively thin, namely about 10mm, and the type selection of a discharging valve cannot be carried out; if a conventional regulating valve is adopted, when slurry passes through a narrow slit between a valve seat and a valve core, large particles and floccules in the slurry are possibly clamped at a channel, and more solid particles are accumulated, so that the whole valve is blocked, materials in a kettle cannot be discharged, and accidents are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that prior art is not enough, provide an experimental facilities for the ejection of compact of polyethylene thick liquid.
The utility model provides an above-mentioned technical problem's technical scheme as follows: an experimental apparatus for polyethylene slurry discharge, comprising:
a polymerization reaction kettle for storing polyethylene slurry;
the discharge tank is connected with the polymerization reaction kettle through a feed pipe, and a first valve is arranged on the feed pipe;
the discharge tank is connected with the flash tank through a discharge pipe, and a second valve is arranged on the discharge pipe;
wherein, one end of the feeding pipe and one end of the discharging pipe, which are far away from the polymerization reaction kettle, both extend downwards in an inclined way; when the first valve is opened, the polymerization reaction kettle conveys polyethylene slurry to the discharge tank under the action of pressure difference or/and liquid level difference; when the second valve is opened, the discharge tank conveys polyethylene slurry into the flash tank under the action of pressure difference or/and liquid level difference.
The utility model has the advantages that: the utility model discloses a set up out the tank between first valve and second valve, utilize the break-make that switches first valve and second valve, carry out the liquid filling flowing back circulation operation to the play tank, can realize the interior thick liquid continuous discharging of reation kettle.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the vertical arrangement of ejection of compact jar, the inlet pipe both ends respectively with the polymerization cauldron lower part and ejection of compact tank bottom intercommunication, the discharging pipe both ends respectively with ejection of compact tank bottom with flash tank intercommunication, ejection of compact tank deck portion pass through the blast pipe with polymerization cauldron's top intercommunication, install the third valve on the blast pipe.
The beneficial effect of adopting the further scheme is that: and communicating the gas phase part of the discharge tank with the gas phase part of the polymerization reaction kettle by using a third valve.
Further, the third valve is a pneumatic ball valve or an electric ball valve.
The beneficial effect of adopting the further scheme is that: the cut-off/connection operation can be realized by adopting an electric ball valve or a pneumatic ball valve.
Further, the discharge tank is obliquely arranged, the two ends of the feeding pipe are communicated with the lower part of the polymerization reaction kettle and the upper end of the discharge tank respectively, and the two ends of the discharging pipe are communicated with the lower end of the discharge tank and the flash tank respectively.
The beneficial effect of adopting the further scheme is that: arrange the play feed tank slope, the play feed tank is equivalent to a part in the middle of inlet pipe and the discharging pipe, need not set up other valves, just can reach polymerization cauldron's continuous ejection of compact, has simplified the flow.
Further, the central axis of the discharge tank, the central axis of the feed pipe and the central axis of the discharge pipe coincide.
The beneficial effect of adopting the further scheme is that: the discharge tank, the feed pipe and the discharge pipe are equivalent to a whole body to realize continuous discharge.
Further, the discharge pipe is communicated with the middle of the flash tank.
Further, the first valve and the second valve are respectively large-diameter ball valves.
The beneficial effect of adopting the further scheme is that: the large-drift-diameter ball valve is adopted, so that the slurry in the pipeline depends on the subsequent flow of the gravity self-flow channel, the pipeline blockage caused by the sedimentation of solid particles in the slurry can be effectively prevented, and the smoothness of the pipeline is ensured.
Further, the first valve and the second valve are respectively a pneumatic ball valve or an electric ball valve.
The beneficial effect of adopting the further scheme is that: the cut-off/connection operation can be realized by adopting an electric ball valve or a pneumatic ball valve.
Further, the inlet pipe with the pipeline of polymerization cauldron discharge gate department passes through flange joint, the discharge pipe with the pipeline of flash tank feed inlet department passes through flange joint.
The beneficial effect of adopting the further scheme is that: utilize the flange to connect, conveniently dismantle.
Further, the inner diameter of the discharge tank is the same as the inner diameter of the feeding pipe or/and the discharging pipe.
The beneficial effect of adopting the further scheme is that: the inner diameter of the discharge tank is the same as that of the feeding pipe and/or the discharging pipe, so that the discharge tank is equivalent to one part of the feeding pipe or the discharging pipe, even the feeding pipe, the discharging pipe and the discharge tank can be regarded as a whole, the slurry automatically flows to a subsequent flow by gravity by switching on and off of the valve, the liquid filling/draining operation is carried out on the discharge tank, the continuous discharge of the polymerization reaction kettle is achieved, the flow is simplified, and the smoothness of the whole pipeline is ensured.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a polymerization reaction kettle; 2. a discharge tank; 21. a feed pipe; 22. a discharge pipe; 23. a flange; 24. an exhaust pipe; 3. a flash tank; 4. a first valve; 5. a second valve; 6. a third valve.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
Example 1
As shown in fig. 1, the experimental facility for discharging polyethylene slurry of this embodiment includes:
a polymerization reactor 1 for storing polyethylene slurry;
the discharge tank 2 is connected with the polymerization reaction kettle 1 through a feed pipe 21, and a first valve 4 is arranged on the feed pipe 21;
the discharge tank 2 is connected with the flash tank 3 through a discharge pipe 22, and a second valve 5 is mounted on the discharge pipe 22;
wherein, the ends of the feeding pipe 21 and the discharging pipe 22 far away from the polymerization reaction kettle 1 extend downwards in an inclined way; when the first valve 4 is opened, the polymerization reactor 1 conveys polyethylene slurry into the discharge tank 2 under the action of pressure difference or/and liquid level difference; when the second valve 5 is opened, the discharge tank 2 conveys polyethylene slurry into the flash tank 3 under the action of pressure difference or/and liquid level difference.
This embodiment is through setting up the ejection of compact jar between first valve and second valve, utilizes the break-make that switches first valve and second valve, carries out liquid filling flowing back circulation operation to the ejection of compact jar, can realize the interior thick liquid continuous discharging of reation kettle.
Specifically, as shown in fig. 1, the discharge tank 2 is vertically arranged, two ends of the feeding pipe 21 are respectively communicated with the lower part of the polymerization reactor 1 and the bottom of the discharge tank 2, two ends of the discharging pipe 22 are respectively communicated with the bottom of the discharge tank 2 and the flash tank 3, the top of the discharge tank 2 is communicated with the top of the polymerization reactor 1 through the exhaust pipe 24, and the exhaust pipe 24 is provided with the third valve 6. And communicating the gas phase part of the discharge tank with the gas phase part of the polymerization reaction kettle by using a third valve.
Wherein, the third valve 6 is a pneumatic ball valve or an electric ball valve. The cut-off/connection operation can be realized by adopting an electric ball valve or a pneumatic ball valve.
In a specific embodiment of this embodiment, the discharge pipe 22 is communicated with the middle of the flash tank 3.
A concrete scheme of this embodiment does, first valve 4 and second valve 5 are big latus rectum ball valve respectively, adopt big latus rectum ball valve, make the thick liquid in the pipeline rely on gravity to flow to follow-up flow by oneself, can realize effectively preventing that the solid particle in the thick liquid from subsiding and causing the pipeline to block up, have guaranteed the unblocked nature of pipeline. The first valve 4 and the second valve 5 are respectively a pneumatic ball valve or an electric ball valve, and the cutting/communication operation can be realized by adopting the electric ball valve or the pneumatic ball valve.
In a preferred embodiment of this embodiment, as shown in fig. 1, the feeding pipe 21 is connected to the pipeline at the discharge port of the polymerization reactor 1 through a flange 23, the discharging pipe 22 is connected to the pipeline at the feed port of the flash tank 3 through a flange 23, and the exhaust pipe 24 is connected to the pipeline at the gas inlet of the polymerization reactor 1 through a flange 23. Utilize the flange to connect, conveniently dismantle.
In a preferred embodiment of the present embodiment, the inside diameter of the discharge tank 2 is the same as the inside diameter of the feeding pipe 21 or/and the discharging pipe 22. The inner diameter of the discharge tank is the same as that of the feeding pipe and/or the discharging pipe, so that the discharge tank is equivalent to one part of the feeding pipe or the discharging pipe, even the feeding pipe, the discharging pipe and the discharge tank can be regarded as a whole, the slurry automatically flows to a subsequent flow by gravity by switching on and off of the valve, the liquid filling/draining operation is carried out on the discharge tank, the continuous discharge of the polymerization reaction kettle is achieved, the flow is simplified, and the smoothness of the whole pipeline is ensured.
Specifically, this embodiment the ejection of compact jar is selected for use slender type structure, when first valve 4 and second valve 5 are opened, can make during thick liquids enter into ejection of compact jar 2 completely, blocking phenomenon can not appear.
The first valve, the second valve and the third valve of the embodiment can adopt manual valves or electromagnetic valves, when the electromagnetic valves are selected, the on-off time of the electromagnetic valves can be controlled by connecting a time controller with the electromagnetic valves, and the first valve, the second valve and the third valve are controlled to be switched by the time controller; when the manual valve is selected, the discharging time can be manually selected, and the intermittent volume discharging can be realized no matter the manual valve or the electromagnetic valve is adopted, so that the aim of continuous discharging is fulfilled.
This embodiment is used for adopting the ejection of compact of slurry method polyethylene thick liquid, (1) during the polymerization cauldron ejection of compact, open first valve and third valve, close the second valve, the polyethylene thick liquid in the polymerization cauldron flows into the discharge tank from the bottom through the flange and the first valve of polymerization cauldron discharge gate pipeline department, gaseous phase in the polymerization cauldron gets into the discharge tank from the top through the flange of third valve and polymerization cauldron air inlet department, after a period of time, the pressure and the liquid level of discharge tank reach the equilibrium with the polymerization cauldron, close first valve and third valve, the ejection of compact of polymerization cauldron and the feeding of discharge tank have been accomplished to this process. (2) When the discharge tank discharges materials, the second valve is opened, the first valve and the third valve are closed, because the discharge tank and the flash tank have pressure difference and liquid level difference, when the second valve is opened, slurry in the discharge tank flows into the flash tank from the bottom through the second valve and the flange on the pipeline of the feed inlet of the flash tank, and after a period of time, the slurry in the discharge tank all flows into the flash tank, the third valve is closed, and the process completes the discharge process of the discharge tank. The continuous discharging effect of the polymerization reaction kettle is achieved through the circulation operation.
Example 2
As shown in fig. 2, the experimental facility for discharging polyethylene slurry of this embodiment includes:
a polymerization reactor 1 for storing polyethylene slurry;
the discharge tank 2 is connected with the polymerization reaction kettle 1 through a feed pipe 21, and a first valve 4 is arranged on the feed pipe 21;
the discharge tank 2 is connected with the flash tank 3 through a discharge pipe 22, and a second valve 5 is mounted on the discharge pipe 22;
wherein, the ends of the feeding pipe 21 and the discharging pipe 22 far away from the polymerization reaction kettle 1 extend downwards in an inclined way; when the first valve 4 is opened, the polymerization reactor 1 conveys polyethylene slurry into the discharge tank 2 under the action of pressure difference or/and liquid level difference; when the second valve 5 is opened, the discharge tank 2 conveys polyethylene slurry into the flash tank 3 under the action of pressure difference or/and liquid level difference.
This embodiment is through setting up the ejection of compact jar between first valve and second valve, utilizes the break-make that switches first valve and second valve, carries out liquid filling flowing back circulation operation to the ejection of compact jar, can realize the interior thick liquid continuous discharging of reation kettle.
Specifically, as shown in fig. 2, the discharge tank 2 is arranged obliquely, two ends of the feeding pipe 21 are respectively communicated with the lower part of the polymerization reactor 1 and the upper end of the discharge tank 2, and two ends of the discharging pipe 22 are respectively communicated with the lower end of the discharge tank 2 and the flash tank 3. Arrange the play feed tank slope, the play feed tank is equivalent to a part in the middle of inlet pipe and the discharging pipe, need not set up other valves, just can reach polymerization cauldron's continuous ejection of compact, has simplified the flow.
In a preferred embodiment of the present embodiment, the central axis of the discharge tank 2, the central axis of the feeding pipe 21, and the central axis of the discharge pipe 22 coincide with each other. The discharge tank, the feed pipe and the discharge pipe are equivalent to a whole body to realize continuous discharge.
As shown in fig. 1, the discharge pipe 22 communicates with the middle of the flash tank 3.
A concrete scheme of this embodiment does, first valve 4 and second valve 5 are big latus rectum ball valve respectively, adopt big latus rectum ball valve, make the thick liquid in the pipeline rely on the follow-up flow of gravity artesian route, can realize effectively preventing that the solid particle in the thick liquid from subsiding and causing the pipeline to block up, have guaranteed the unblocked nature of pipeline.
The first valve 4 and the second valve 5 of this embodiment are respectively a pneumatic ball valve or an electric ball valve. The cut-off/connection operation can be realized by adopting an electric ball valve or a pneumatic ball valve.
Specifically, as shown in fig. 2, the feeding pipe 21 is connected to a pipeline at a discharge port of the polymerization reactor 1 through a flange 23, and the discharging pipe 22 is connected to a pipeline at a feed port of the flash tank 3 through a flange 23. Utilize the flange to connect, conveniently dismantle.
In a preferred embodiment of the present embodiment, the inside diameter of the discharge tank 2 is the same as the inside diameter of the feeding pipe 21 or/and the discharging pipe 22. The inner diameter of the discharge tank is the same as that of the feeding pipe and/or the discharging pipe, so that the discharge tank is equivalent to one part of the feeding pipe or the discharging pipe, even the feeding pipe, the discharging pipe and the discharge tank can be regarded as a whole, the slurry automatically flows to a subsequent flow by gravity by switching on and off of the valve, the liquid filling/draining operation is carried out on the discharge tank, the continuous discharge of the polymerization reaction kettle is achieved, the flow is simplified, and the smoothness of the whole pipeline is ensured.
Specifically, this embodiment the ejection of compact jar is selected for use slender type structure, when first valve 4 and second valve 5 are opened, can make during thick liquids enter into ejection of compact jar 2 completely, blocking phenomenon can not appear.
The first valve, the second valve and the third valve of the embodiment can adopt manual valves or electromagnetic valves, when the electromagnetic valves are selected, the on-off time of the electromagnetic valves can be controlled by connecting a time controller with the electromagnetic valves, and the first valve, the second valve and the third valve are controlled to be switched by the time controller; when the manual valve is selected, the discharging time can be manually selected, and the intermittent volume discharging can be realized no matter the manual valve or the electromagnetic valve is adopted, so that the aim of continuous discharging is fulfilled.
This embodiment is used for adopting the ejection of compact of slurry method polyethylene thick liquid, (1) during the polymerization cauldron ejection of compact, open first valve, close the second valve, the polyethylene thick liquid among the polymerization cauldron flows into the discharge tank from the bottom through the flange and the first valve of polymerization cauldron discharge gate pipeline department, and after a period, the thick liquid is full of the discharge tank, closes first valve, and the feeding of polymerization cauldron ejection of compact and discharge tank has been accomplished to this process. (2) When the discharge tank discharges materials, the second valve is opened, the first valve is closed, because the discharge tank and the flash tank have liquid level difference, when the second valve is opened, slurry in the discharge tank flows into the flash tank from the bottom through the flange on the pipeline at the feed inlet of the second valve and the flash tank, and after a period of time, the slurry in the discharge tank all flows into the flash tank, the second valve is closed, and the discharge process of the discharge tank is completed in the process. The continuous discharging effect of the polymerization reaction kettle is achieved through the circulation operation.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. An experimental facility for polyethylene slurry discharge, comprising:
a polymerization reaction kettle for storing polyethylene slurry;
the discharge tank is connected with the polymerization reaction kettle through a feed pipe, and a first valve is arranged on the feed pipe;
the discharge tank is connected with the flash tank through a discharge pipe, and a second valve is arranged on the discharge pipe;
wherein, one end of the feeding pipe and one end of the discharging pipe, which are far away from the polymerization reaction kettle, both extend downwards in an inclined way; when the first valve is opened, the polymerization reaction kettle conveys polyethylene slurry to the discharge tank under the action of pressure difference or/and liquid level difference; when the second valve is opened, the discharge tank conveys polyethylene slurry into the flash tank under the action of pressure difference or/and liquid level difference.
2. The experimental facility for discharging polyethylene slurry according to claim 1, wherein the discharge tank is vertically arranged, two ends of the feeding pipe are respectively communicated with the lower part of the polymerization reaction kettle and the bottom of the discharge tank, two ends of the discharging pipe are respectively communicated with the bottom of the discharge tank and the flash tank, the top of the discharge tank is communicated with the top of the polymerization reaction kettle through an exhaust pipe, and a third valve is installed on the exhaust pipe.
3. The experimental facility for discharging polyethylene slurry according to claim 2, wherein the third valve is a pneumatic ball valve or an electric ball valve.
4. The experimental facility for discharging polyethylene slurry according to claim 1, wherein the discharge tank is arranged obliquely, two ends of the feeding pipe are respectively communicated with the lower part of the polymerization reaction kettle and the upper end of the discharge tank, and two ends of the discharging pipe are respectively communicated with the lower end of the discharge tank and the flash tank.
5. The experimental facility for the discharge of polyethylene slurry according to claim 4, characterized in that the central axis of the discharge tank, the central axis of the feeding pipe and the central axis of the discharge pipe coincide.
6. The experimental facility for discharging polyethylene slurry according to claim 4, wherein the discharge pipe is communicated with the middle part of the flash tank.
7. The experimental facility for discharging polyethylene slurry according to claim 1, wherein the first valve and the second valve are large-diameter ball valves respectively.
8. The experimental facility for discharging polyethylene slurry according to claim 1, wherein the first valve and the second valve are respectively a pneumatic ball valve or an electric ball valve.
9. The experimental facility for discharging polyethylene slurry according to claim 1, wherein the feeding pipe is connected with the pipeline at the discharging port of the polymerization reaction kettle through a flange, and the discharging pipe is connected with the pipeline at the feeding port of the flash tank through a flange.
10. The experimental facility for discharging polyethylene slurry according to claim 1, wherein the discharge tank inner diameter is the same as the feed pipe or/and the discharge pipe inner diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021743020.5U CN212263202U (en) | 2020-08-18 | 2020-08-18 | Experimental equipment for discharging polyethylene slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021743020.5U CN212263202U (en) | 2020-08-18 | 2020-08-18 | Experimental equipment for discharging polyethylene slurry |
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| Publication Number | Publication Date |
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| CN212263202U true CN212263202U (en) | 2021-01-01 |
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| CN202021743020.5U Active CN212263202U (en) | 2020-08-18 | 2020-08-18 | Experimental equipment for discharging polyethylene slurry |
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Denomination of utility model: An experimental equipment for polyethylene slurry discharge Effective date of registration: 20230922 Granted publication date: 20210101 Pledgee: Industrial Commercial Bank of China Ltd. Beijing Haidian branch Pledgor: BEIJING TERCH SCIENTIFIC RESEARCH EQUIPMENT Co.,Ltd. Registration number: Y2023110000413 |