CN214405639U - Polymerization inhibitor injection complete equipment's device - Google Patents
Polymerization inhibitor injection complete equipment's device Download PDFInfo
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- CN214405639U CN214405639U CN202120233441.1U CN202120233441U CN214405639U CN 214405639 U CN214405639 U CN 214405639U CN 202120233441 U CN202120233441 U CN 202120233441U CN 214405639 U CN214405639 U CN 214405639U
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Abstract
A polymerization inhibitor injection device for complete equipment comprises a fluid pipeline and an injection pipeline positioned outside the fluid pipeline; also comprises a connecting piece and a sphere with a hole; the connecting piece is a section of horn-shaped pipe body, one end of the connecting piece is provided with a horn mouth as an inlet, the other end of the connecting piece is provided with a horn mouth as an outlet, and an inward-contracted narrow-diameter pipe section is arranged between the inlet and the outlet; the ball body with the hole is a spherical hollow shell body, the interior of the spherical hollow shell body is provided with an accommodating cavity, and the surface of the spherical hollow shell body is uniformly provided with a plurality of jet holes which are communicated inside and outside; the injection pipeline is connected with the inlet of the connecting piece, and the sphere with the hole is connected with the outlet of the connecting piece and communicated with each other; the sphere with the hole is positioned in the fluid pipeline, and an annular overflowing channel is reserved between the sphere with the hole and the fluid pipeline; the connecting piece extends out of the pipeline from the inside of the fluid pipeline; the injection pipeline, the connecting piece, the sphere with the hole and the connecting piece and the fluid pipeline are welded in a sealing way. The utility model discloses make fluid and polymerization inhibitor misce bene, reduce the auto-agglutination of fluid medium, gather each other, the cycle operation duration of extension fixture.
Description
Technical Field
The utility model relates to a petrochemical technical field specifically is to provide a polymerization inhibitor pours into complete sets's device into, is to the improvement that polymerization inhibitor pours into complete sets into in the petrochemical production, concretely relates to polymerization inhibitor with by the inhibition liquid misce bene, increase the inhibition and gather the effect, belong to the improvement that improves polymerization inhibitor and pour into complete sets into improved technical field.
Background
With the development of petrochemical technology, varieties of resins, rubbers and the like are more and more widely applied, so that the demand of corresponding monomers is increasingly increased, and the monomers such as styrene monomers, butadiene, isoprene, piperylene, dicyclopentadiene and other diolefins are extremely easy to self-polymerize or inter-polymerize, so that a polymerization inhibitor is often required to be added in the production process to slow down the polymerization rate. The traditional polymerization inhibitor injection mode comprises a direct injection mode, a pipeline insertion mode, a perforated cylindrical pipeline ejection mode and the like, and the injection mode has the phenomenon that the polymerization inhibitor and the polymerization-inhibited liquid are mixed unevenly, so that the polymerization inhibition effect of the polymerization-inhibited liquid is not achieved locally, and the long-period operation of equipment and pipelines is influenced.
A certain petrochemical carbon five separation device adopts ST to independently develop a carbon five separation process technology to produce products such as isoprene, piperylene, dicyclopentadiene and the like, an extraction system adopts a pipeline insertion type, namely a polymerization inhibitor is sprayed into fluid through a pipeline directly inserted into a central line of a fluid pipeline, after the method is used, polymers appear on the inner wall of the pipe within a period of time, and simultaneously enter a heat exchanger and a tower along with the fluid, so that the heat exchange capacity of the heat exchanger is reduced, the internal parts of the tower are blocked, the separation capacity of the tower is influenced, and the long-period operation of the device is further seriously influenced. Through analysis, the main reason is that the polymerization inhibitor is not uniformly mixed with the fluid, especially, the polymerization inhibitor on the upper inner wall of the fluid pipeline is less or not, more polymers are remained on the upper inner wall, and as time goes on, more and more polymers are remained, and finally, the pipeline channel is narrower and narrower, so that the normal operation of production is influenced.
A butadiene device of a certain petrochemical company adopts an ACN process technology, mixed carbon four provided by an ethylene device is used as a raw material, acetonitrile is used as a solvent, two-stage extraction rectification and two-stage common rectification are adopted to obtain a polymerization-stage 1, 3-butadiene product, a refining system adopts a direct injection type, namely, a polymerization inhibitor is directly sprayed into fluid through a pipeline, and after the method is used, internal parts of a tower are blocked within a period of time, the pressure difference of the tower is increased, the separation capacity of the tower is influenced, and then the product is unqualified. Through analysis, the main reason is that the polymerization inhibitor is not uniformly mixed with the fluid, the fluid partially generates self-polymerization reaction, and as the polymer is more and more, the tower plate is finally blocked, and the normal separation of the tower is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses not enough to provide a polymerization inhibitor pours into complete sets's device into to prior art, its aim at solve polymerization inhibitor and by the inhibition liquid misce bene, increase the inhibition and gather the effect.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a polymerization inhibitor injection complete equipment device comprises a fluid pipeline and an injection pipeline, wherein the injection pipeline is positioned outside the fluid pipeline; also comprises a connecting piece and a sphere with a hole; the connecting piece is a section of horn-shaped pipe body, a horn mouth at one end of the connecting piece is an inlet, a horn mouth at the other end of the connecting piece is an outlet, and an inward-contracted narrow-diameter pipe section is arranged between the inlet and the outlet; the ball body with the hole is a spherical hollow shell body with an accommodating cavity inside, and a plurality of jet holes which are communicated inside and outside are uniformly formed in the surface of the ball body; the injection pipeline is connected with the inlet of the connecting piece, and the sphere with the hole is connected with the outlet of the connecting piece; the injection pipeline, the connecting piece and the sphere with the hole are communicated; the sphere with the hole is positioned in the fluid pipeline, and an annular overflowing channel is reserved between the sphere with the hole and the fluid pipeline; the connecting piece extends out of the pipeline from the inside of the fluid pipeline; the injection pipeline, the connecting piece, the sphere with the hole and the connecting piece and the fluid pipeline are welded in a sealing way.
Preferably, the center of the sphere of the perforated sphere is located on the central axis of the fluid pipeline.
Preferably, the narrow-diameter pipe section is formed by gradually and inwardly shrinking from the bell mouths at the two ends of the inlet and the outlet of the connecting piece to the middle part of the pipe body.
Preferably, the ratio of the diameter of the narrow neck inside diameter of the narrow-diameter pipe section to the diameter of the inside diameter of the injection pipeline is 1/2-2/3.
Preferably, the ratio of the inner diameter of the fluid pipeline to the outer diameter of the porous sphere is 2-4.
Preferably, the aperture of the injection hole is 2-4 mm.
Preferably, the injection pipeline, the connecting piece, the fluid pipeline and the ball body with holes are made of stainless steel materials.
Preferably, the narrow diameter pipe section is located outside the fluid pipeline.
Preferably, the narrow diameter pipe section is close to the inlet end of the connecting piece.
Preferably, the bell mouth diameter of the inlet of the connecting piece is larger than that of the outlet of the connecting piece.
The utility model has the advantages that: the utility model has simple and practical structure and simple manufacture; the narrow-diameter pipe section and the porous ball of the connecting piece enable the injection pressure of the polymerization inhibitor to be large, and due to the fact that the annular overflowing channel is reserved between the porous ball and the fluid pipeline, the fluid and the polymerization inhibitor are large in mixing area and uniform in mixing, the self-gathering or mutual-gathering of fluid media is greatly reduced, the long-period operation of the device can be prolonged, the recovery rate of products can be improved, and comprehensive economic benefits are improved.
Drawings
Figure 1 is a schematic structural diagram of the present invention in a fluid pipeline,
figure 2 is a schematic left-hand view of figure 1,
wherein: 1 is an injection pipeline, 2 is a connecting piece, 3 is a sphere with holes, 4 is a fluid pipeline, a narrow-diameter pipe section 21, an injection hole 31 and a flow passage 41.
Detailed Description
The following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention.
Referring to fig. 1 and 2, the apparatus for injecting polymerization inhibitor into a complete equipment of the present invention comprises a fluid pipeline 4 and an injection pipeline 1, wherein the injection pipeline is located outside the fluid pipeline; the device also comprises a connecting piece 2 and a sphere 3 with a hole; the connecting piece 2 is a section of horn-shaped pipe body, one end of the connecting piece is provided with a horn mouth as an inlet, the other end of the connecting piece is provided with a horn mouth as an outlet, and an inward-contracted narrow-diameter pipe section 21 is arranged between the inlet and the outlet; the perforated sphere 3 is a spherical hollow shell with an accommodating cavity inside, and a plurality of spray holes 31 which are communicated inside and outside are uniformly formed in the surface of the hollow shell; the injection pipeline 1 is connected with the inlet of the connecting piece 2, and the sphere 3 with the hole is connected with the outlet of the connecting piece 2; the injection pipeline 1, the connecting piece 2 and the sphere 3 with the hole are communicated; the perforated sphere 3 is positioned in the fluid pipeline 4, and an annular overflowing channel 41 is reserved between the perforated sphere 3 and the fluid pipeline 4; the connecting piece extends out of the fluid pipeline 4; the injection pipeline, the connecting piece, the sphere with the hole and the connecting piece and the fluid pipeline are welded in a sealing way.
Preferably, the center of the sphere of the perforated sphere is located on the central axis of the fluid pipeline. An annular overflowing channel 41 is reserved between the perforated sphere 3 and the fluid pipeline 4, fluid and polymerization inhibitor around the perforated sphere are mixed more uniformly, and self-polymerization or mutual polymerization of fluid media is greatly reduced.
Preferably, the narrow-diameter pipe section 21 is formed by gradually shrinking inwards from the bell mouths at the two ends of the inlet and the outlet of the connecting piece to the middle part of the pipe body. When fluid medium enters the horn-shaped connecting piece, the flow velocity of the narrow-diameter pipe section is increased, and the polymerization inhibitor is quickly sprayed into the sphere with the hole under the condition of high flow velocity and is sprayed out from the plurality of spray holes 31 to be mixed with the fluid around;
preferably, the ratio of the diameter of the narrow neck inside diameter of the narrow-diameter pipe section 21 to the diameter of the inside diameter of the injection pipeline is 1/2-2/3.
Preferably, the ratio of the inner diameter of the fluid pipeline to the outer diameter of the porous sphere is 2-4.
Preferably, the aperture of the injection hole is 2-4 mm.
Preferably, the injection pipeline, the connecting piece, the fluid pipeline and the ball body with holes are made of stainless steel materials.
Preferably, the narrow diameter pipe section is located outside the fluid pipeline. To substantially increase the flow rate.
Preferably, the narrow diameter pipe section is close to the inlet end of the connecting piece.
Preferably, the bell mouth diameter of the inlet of the connecting piece is larger than that of the outlet of the connecting piece. So as to increase the injection pressure of the polymerization inhibitor.
The utility model relates to a polymerization inhibitor pours into all stainless steel that adopt of parts materials such as injection pipeline, connecting piece, foraminiferous spheroid, fluid pipeline in complete sets's the device into. The utility model discloses mainly change tradition injection form into porose spherical blowout, fix foraminiferous spheroid and gather liquid fluid pipeline horizontal pipeline center by hindering, send into polymerization inhibitor into the sphere through the connecting piece in, polymerization inhibitor forms positive pressure in the foraminiferous spheroid, under the pressure effect, the even spout of polymerization inhibitor is hindered in gathering the liquid in the foraminiferous spheroid.
The utility model discloses the installation method includes following step:
(1) manufacturing a fluid pipeline: according to the traditional method, the inner diameter and the material of the fluid pipeline are kept consistent with those of the fluid medium pipeline;
(2) manufacturing an injection pipeline: according to the traditional method, the diameter of the injection pipeline is calculated according to the injection amount and the flow rate of the polymerization inhibitor, the material and the wall thickness of the injection pipeline are determined according to the physical and chemical properties of the polymerization inhibitor, and after the conditions are confirmed, the pipeline is manufactured according to the processing specification of the pipeline;
(3) manufacturing a connecting piece: after the steps (1) and (2) are finished, manufacturing a horn-shaped connecting piece according to the specification of the injection pipeline, wherein the ratio of the diameter of the narrowest part of the horn shape to the diameter of the inner diameter of the injection pipeline is 1/2-2/3, when a fluid medium enters the horn-shaped connecting piece, the flow rate is increased, and a polymerization inhibitor is quickly sprayed into the perforated sphere under the condition of high flow rate;
(4) manufacturing a sphere with a hole: the size and the material of the porous sphere are determined according to the injection amount of the polymerization inhibitor and the physical and chemical properties of the polymerization inhibitor, the ratio of the inner diameter of the fluid pipeline to the outer diameter of the porous sphere is 2-4 under general conditions, the size and the number of the injection holes are determined according to the flow property of a fluid medium, and the larger the viscosity of the fluid is, the larger the diameter of the injection holes is in principle, the blockage of the holes is prevented;
(5) welding and forming: after the steps (1), (2), (3) and (4) are finished, firstly, the injection pipeline is welded with the horn-shaped connecting piece, then the horn-shaped connecting piece is welded with the perforated sphere, the flow channel of the horn-shaped connecting piece and the connecting channel of the perforated sphere are kept in a flowing state, and finally the welding piece is welded with the fluid pipeline, and the perforated sphere is arranged on the central axis of the fluid pipeline.
The invention is elucidated below in connection with specific embodiments:
example 1:
the application of the improved polymerization inhibitor injection complete equipment to the 13 ten thousand ton/year butadiene extraction device comprises the following steps:
(1) manufacturing a fluid pipeline: the nominal diameter of the inner diameter of the fluid pipeline is 6 inches, the material is 18-8 stainless steel, and the fluid pipeline is manufactured according to the above dimensions;
(2) manufacturing an injection pipeline: injecting the pipeline with the diameter of 1 inch and the material of 18-8 stainless steel, and manufacturing the pipeline according to the processing specification of the pipeline after the conditions are confirmed;
(3) manufacturing a connecting piece: after the steps (1) and (2) are finished, manufacturing a horn-shaped connecting piece according to the specification of the injection pipeline, wherein the inner diameter of the narrow neck is 2/3 of the inner diameter of the injection pipeline, when a fluid medium enters the horn-shaped connecting piece, the flow rate is increased, and a polymerization inhibitor is quickly sprayed into the sphere with the hole under the condition of high flow rate;
(4) manufacturing a sphere with a hole: the ball body with the holes is made of 18-8 stainless steel, the outer diameter of the ball body is 1.5 inches, the diameter of the holes is 2mm, and the ball body is manufactured according to the above dimensions;
(5) welding and forming: after the steps (1), (2), (3) and (4) are finished, firstly, the injection pipeline is welded with the connecting piece, then the connecting piece is welded with the perforated sphere (the flow channel of the connecting piece and the connecting channel of the perforated sphere are kept in a flowing state), and finally the welding piece is welded with the fluid pipeline, wherein the perforated sphere is positioned on the central line of the fluid pipeline.
After the scheme is implemented, the transportation pipeline and the tower equipment are not blocked and caked within 12 months of transportation.
Example 2:
the application of the improved polymerization inhibitor injection complete equipment to the 11 ten thousand tons/year carbon five separation device comprises the following steps:
the operation method is basically the same as that of the embodiment 1, except that in the step (1) and the step (4), the nominal diameter of the inner diameter of the fluid pipeline is 8 inches, and the diameter of the outer diameter of the sphere with the hole is 2 inches; after the scheme is implemented, the conveying pipeline is not blocked and caked within 12 months.
Comparative example 1: traditional inhibitor injection format: the direct injection type, pipeline insertion type and perforated cylindrical pipeline ejection type butadiene extraction device has the using effects that:
(1) the direct injection type of polymerization inhibitor: the direct injection type of the polymerization inhibitor is that an injection pipeline is directly welded on a fluid medium pipeline, and then the polymerization inhibitor is conveyed into a fluid medium through a plunger pump, and the polymerization inhibitor achieves the purpose of mixing along with the flow of the fluid medium.
After the conveying is carried for 2 months, the normal operation of the device is seriously influenced by the blockage and coking of the pipeline, the tower and other equipment.
(2) The polymerization inhibitor is inserted into the pipeline: the pipe insertion type of the polymerization inhibitor is to insert the injection pipe into the center line of the fluid medium pipe, the pipe and the pipe are fixed in a welding mode, then the polymerization inhibitor is sent into the fluid medium through the plunger pump, the polymerization inhibitor achieves the purpose of mixing along with the flowing of the fluid medium, in the process, the fluid medium at the center of the fluid pipe carries more polymerization inhibitor, the polymerization inhibitor carried by the fluid medium deviated from the center is less, and even the polymerization inhibitor cannot be contacted, so that the self-polymerization is easily formed on the pipe wall of the fluid medium, and the polymers enter equipment such as a tower along with the fluid medium, and the equipment such as the pipe, the tower and the like can be blocked for a long time.
After the device is conveyed for 3 months, the normal operation of the device is seriously influenced by the blockage and coking of the devices such as pipelines, towers and the like.
(3) The perforated cylindrical pipeline of the polymerization inhibitor is sprayed: the perforated cylindrical pipeline ejection type polymerization inhibitor is characterized in that a perforated cylindrical pipeline (the tail end of the cylindrical pipeline is not opened, only holes are formed in the periphery of the cylinder) is inserted into the bottom of a fluid medium pipeline, the pipeline and the pipeline are fixed in a welding mode, then the polymerization inhibitor is sent into the cylinder through a plunger pump, the polymerization inhibitor is sprayed into the fluid medium in the cylinder under the action of pressure, and the polymerization inhibitor achieves the purpose of mixing along with the flowing of the fluid medium.
After the conveying is carried out for 6 months, the normal operation of the device is influenced by the blockage and coking conditions on the equipment such as pipelines, towers and the like.
From the above results, it can be seen that: the blockage of the equipment such as the pipeline, the tower and the like occurs in half a year in a direct injection type, a pipeline insertion type or a perforated cylindrical pipeline ejection type.
Comparative example 2: traditional inhibitor injection format: the direct injection type, pipeline insertion type and perforated cylindrical pipeline ejection type carbon five-separation device has the using effects of being applied to the 11 ten thousand tons/year carbon five-separation device:
(1) the direct injection type of polymerization inhibitor: the direct injection type of the polymerization inhibitor is that an injection pipeline is directly welded on a fluid medium pipeline, and then the polymerization inhibitor is conveyed into a fluid medium through a plunger pump, and the polymerization inhibitor achieves the purpose of mixing along with the flow of the fluid medium.
After the device is conveyed for 1 month, the normal operation of the device is seriously influenced by the blockage and coking of the devices such as pipelines, towers and the like.
(2) The polymerization inhibitor is inserted into the pipeline: the pipe insertion type of the polymerization inhibitor is to insert the injection pipe into the center line of the fluid medium pipe, the pipe and the pipe are fixed in a welding mode, then the polymerization inhibitor is sent into the fluid medium through the plunger pump, the polymerization inhibitor achieves the purpose of mixing along with the flowing of the fluid medium, in the process, the fluid medium at the center of the fluid pipe carries more polymerization inhibitor, the polymerization inhibitor carried by the fluid medium deviated from the center is less, and even the polymerization inhibitor cannot be contacted, so that the self-polymerization is easily formed on the pipe wall of the fluid medium, and the polymers enter equipment such as a tower along with the fluid medium, and the equipment such as the pipe, the tower and the like can be blocked for a long time.
After the device is conveyed for 3 months, the normal operation of the device is seriously influenced by the blockage and coking of the devices such as pipelines, towers and the like.
(3) The perforated cylindrical pipeline of the polymerization inhibitor is sprayed: the perforated cylindrical pipeline ejection type polymerization inhibitor is characterized in that a perforated cylindrical pipeline (the tail end of the cylindrical pipeline is not opened, only holes are formed in the periphery of the cylinder) is inserted into the bottom of a fluid medium pipeline, the pipeline and the pipeline are fixed in a welding mode, then the polymerization inhibitor is sent into the cylinder through a plunger pump, the polymerization inhibitor is sprayed into the fluid medium in the cylinder under the action of pressure, and the polymerization inhibitor achieves the purpose of mixing along with the flowing of the fluid medium.
After the conveying is carried for 5 months, the normal operation of the device is influenced by the blockage and coking of the pipeline, the tower and other equipment.
From the above results, it can be seen that: the blockage of the equipment such as the pipeline, the tower and the like occurs in half a year in a direct injection type, a pipeline insertion type or a perforated cylindrical pipeline ejection type.
The above examples are merely illustrative of the technical concept and technical features of the present invention, and thus the scope of the present invention is not limited thereto. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A polymerization inhibitor injection complete equipment device comprises a fluid pipeline and an injection pipeline, wherein the injection pipeline is positioned outside the fluid pipeline; it is characterized by also comprising a connecting piece (2) and a sphere body (3) with a hole; the connecting piece (2) is a section of horn-shaped pipe body, a horn mouth at one end of the connecting piece is an inlet, a horn mouth at the other end of the connecting piece is an outlet, and an inward-contracted narrow-diameter pipe section (21) is arranged between the inlet and the outlet; the perforated sphere (3) is a spherical hollow shell with an accommodating cavity inside, and a plurality of jet holes (31) which are communicated with the inside and the outside are uniformly formed in the surface of the spherical hollow shell; the injection pipeline (1) is connected with the inlet of the connecting piece (2), and the sphere (3) with the hole is connected with the outlet of the connecting piece (2); the injection pipeline (1), the connecting piece (2) and the sphere (3) with the hole are communicated; the perforated sphere (3) is positioned in the fluid pipeline (4) and an annular overflowing channel (41) is reserved between the perforated sphere and the fluid pipeline; the connecting piece extends out of the fluid pipeline (4); the injection pipeline, the connecting piece, the sphere with the hole and the connecting piece and the fluid pipeline are welded in a sealing way.
2. The apparatus for injecting a polymerization inhibitor into a plant according to claim 1, wherein the center of said perforated sphere is located on the central axis of said fluid conduit.
3. The apparatus for injecting a polymerization inhibitor into a plant as claimed in claim 1, wherein said narrow-diameter pipe section (21) is formed by gradually narrowing inward toward the middle of the pipe body from the flares at both ends of said inlet and outlet of said connecting member.
4. The apparatus for injecting a polymerization inhibitor into a plant as claimed in claim 1, wherein the ratio of the diameter of the narrow neck inside diameter of said narrow-diameter pipe section (21) to the diameter of the inside diameter of said injection pipe is 1/2 to 2/3.
5. The apparatus according to claim 1, wherein the ratio of the inner diameter of the fluid pipe to the outer diameter of the porous spherical body is 2 to 4.
6. The apparatus for injecting a polymerization inhibitor into a plant as claimed in claim 1, wherein said injection holes have a hole diameter of 2 to 4 mm.
7. The apparatus according to claim 1, wherein the injection pipe, the connecting member, the fluid pipe, and the porous ball are made of stainless steel.
8. The apparatus for injecting a polymerization inhibitor into a plant according to claim 3, wherein said narrow-diameter pipe section is located in a pipe section outside said fluid piping.
9. The apparatus for injecting a polymerization inhibitor into a plant as claimed in claim 8, wherein said narrow-diameter pipe section is located near an inlet end of said connecting member.
10. The apparatus for injecting a polymerization inhibitor into a plant as claimed in claim 3, wherein said connecting member has an inlet port with a larger flare diameter than an outlet port thereof.
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| CN202120233441.1U CN214405639U (en) | 2021-01-27 | 2021-01-27 | Polymerization inhibitor injection complete equipment's device |
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| CN202120233441.1U CN214405639U (en) | 2021-01-27 | 2021-01-27 | Polymerization inhibitor injection complete equipment's device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114719115A (en) * | 2022-03-16 | 2022-07-08 | 中国航发沈阳发动机研究所 | Fluid temperature adjusting structure in pipeline |
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2021
- 2021-01-27 CN CN202120233441.1U patent/CN214405639U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114719115A (en) * | 2022-03-16 | 2022-07-08 | 中国航发沈阳发动机研究所 | Fluid temperature adjusting structure in pipeline |
| CN114719115B (en) * | 2022-03-16 | 2024-03-19 | 中国航发沈阳发动机研究所 | Structure for adjusting temperature of fluid in pipeline |
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