CN215722572U - Long-distance pressure conveying system for emulsion polymerization acrylate rubber latex - Google Patents
Long-distance pressure conveying system for emulsion polymerization acrylate rubber latex Download PDFInfo
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- CN215722572U CN215722572U CN202122277996.9U CN202122277996U CN215722572U CN 215722572 U CN215722572 U CN 215722572U CN 202122277996 U CN202122277996 U CN 202122277996U CN 215722572 U CN215722572 U CN 215722572U
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Abstract
The utility model belongs to the technical field of latex conveying, and particularly relates to a long-distance pressure conveying system for emulsion polymerization acrylate rubber latex. The utility model comprises a polymerization kettle, wherein the polymerization kettle is connected with a pressure conveying tank, and a pipeline connecting the polymerization kettle and the pressure conveying tank is provided with a stop valve A and a sight glass; the pressure delivery tank top is equipped with level gauge, air supply system and pressure relief system, and the air supply system includes manometer, governing valve valves and check valve, and pressure relief system includes trip valve B and relief valve. The utility model has scientific and reasonable design and simple and convenient operation, avoids the demulsification phenomenon generated by directly shearing latex in the conveying process, does not need to frequently clean equipment, and is energy-saving and environment-friendly.
Description
Technical Field
The utility model belongs to the technical field of latex conveying, and particularly relates to a long-distance pressure conveying system for emulsion polymerization acrylate rubber latex.
Background
The acrylate rubber is a special synthetic rubber, and is more and more widely applied due to the special main chain saturation and polar ester group side chains, and the production of the acrylate rubber generally comprises the parts of proportioning, polymerization, coagulation, washing, drying and the like.
Most of acrylic ester raw materials are A raw materials, emulsions formed after polymerization are C or V raw materials, in order to facilitate risk classification control and enhance safety production, a batching and polymerization device is generally arranged in an A polymerization workshop, and devices for coagulation, washing, drying and the like are arranged in a C post-treatment workshop, namely acrylic ester monomers with different proportions are firstly blended together in the polymerization workshop and then transferred to a polymerization kettle for polymerization reaction, and the latex generated by the reaction is conveyed to the coagulation kettle of the post-treatment workshop for coagulation, washing and drying. The distance between the polymerization workshop A and the post-treatment workshop C is required to meet the requirement in GB50160-2008 'petrochemical industry enterprise design fire protection code', namely, the distance is more than 20 m.
The acrylate rubber is produced in an emulsion polymerization mode, polymerization reaction is carried out in an emulsion bundle, the emulsion bundle is continuously enlarged as the polymerization process advances, meanwhile, the branched chain of the acrylate rubber is polar ester group, the hydrophilicity is very strong, the emulsion bundle of the acrylate rubber is very unstable after polymerization is finished due to the two factors, and the macromolecule acrylate rubber wrapped by the emulsion bundle is very easy to break the protection of the emulsion bundle under the action of external force, particularly shearing force, so that emulsion breaking is formed.
Traditional long distance transport latex mode is carried through the centrifugal pump, then rotatory impeller blade produces serious shearing to the latex during transport, the breakdown of emulsion phenomenon inevitably appears, the latex seriously blocks up the pump body at the inside breakdown of emulsion of pump, lead to need frequent clearance, go on once every week almost in butadiene styrene rubber production process, considerable manpower and material resources have not only been occupied, and the loss of a large amount of latex has been caused, the VOCs who volatilizees in the clearance process has caused the atmospheric pollution, the latex that trickles to ground simultaneously has caused soil pollution.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a long-distance pressure conveying system for emulsion polymerization acrylate rubber latex, which is scientific and reasonable in design, simple and convenient to operate, capable of avoiding the emulsion breaking phenomenon caused by direct shearing of the latex in the conveying process, free of frequent equipment cleaning, energy-saving and environment-friendly.
The long-distance pressure conveying system for the emulsion polymerization acrylate rubber latex comprises a polymerization kettle, wherein the polymerization kettle is connected with a pressure conveying tank, and a pipeline for connecting the polymerization kettle and the pressure conveying tank is provided with a stop valve A and a sight glass; the pressure delivery tank top is equipped with level gauge, air supply system and pressure relief system, and the air supply system includes manometer, governing valve valves and check valve, and pressure relief system includes trip valve B and relief valve.
And an outlet valve is arranged below the pressure conveying tank.
The pressure delivery tank is connected with the post-treatment workshop through an outlet valve and a pipeline.
The design pressure of the pressure conveying tank is 0.8 MPa.
The material pipeline used in the utility model requires mirror polishing, and the polishing roughness is less than or equal to 0.2 mu m.
The take-off pressure of the safety valve is 0.7 MPa.
When the utility model is used, the method comprises the following steps:
(1) mixing acrylate monomers, carrying out polymerization reaction in a polymerization kettle, opening a stop valve A at the bottom of the polymerization kettle after the reaction is finished, observing latex from a sight glass, and closing the stop valve A when no latex exists in the sight glass, wherein the polymerization kettle can carry out the next polymerization reaction;
(2) opening an outlet valve at the bottom of the pressure conveying tank, wherein the outlet valve is communicated with an aftertreatment workshop, arranging an air source system to keep the pressure in the pressure conveying tank between 0.15MPa and 0.6MPa, and controlling the flow rate between 10m/min and 15 m/min;
(3) observing a liquid level meter on the pressure conveying tank, closing an outlet valve at the bottom of the pressure conveying tank when the liquid level is 0, adjusting the opening of a regulating valve group of an air source system to 0, and opening a stop valve B of an upper pressure relief system to start pressure relief for the pressure conveying tank;
(4) and after the pressure conveying tank is completely decompressed, closing a stop valve B of the decompression system, opening a stop valve A at the bottom of the polymerization kettle, and preparing to start next pressure conveying of the latex.
Compared with the prior art, the utility model has the following beneficial effects:
(1) the utility model has scientific and reasonable design and simple and convenient operation, adopts pressure to convey latex, and can control the conveying speed of the latex by adjusting the pressure;
(2) the utility model avoids the shearing of the latex by the rotating impeller blade when the traditional centrifugal pump conveys the latex, thereby avoiding the emulsion breaking phenomenon of the latex in the conveying process, needing no frequent cleaning of equipment and protecting the environment.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1. a polymerization kettle; 2. a valve A is cut off; 3. a sight glass; 4. a valve B is cut off; 5. a safety valve; 6. a pressure gauge; 7. adjusting the valve bank; 8. a check valve; 9. a pressure delivery tank; 10. a post-processing workshop; 11. an outlet valve; 12. a liquid level meter.
Detailed Description
The present invention is further described below with reference to examples.
Example 1
As shown in figure 1, a long-distance pressure conveying system for emulsion polymerization acrylate rubber latex comprises a polymerization kettle 1, wherein the polymerization kettle 1 is connected with a pressure conveying tank 9, and a pipeline for connecting the polymerization kettle 1 with the pressure conveying tank 9 is provided with a shut-off valve A2 and a sight glass 3; a liquid level meter 12, an air source system and a pressure relief system are arranged above the pressure conveying tank 9, the air source system comprises a pressure gauge 6, a regulating valve group 7 and a check valve 8, and the pressure relief system comprises a shut-off valve B4 and a safety valve 5; an outlet valve 11 is arranged below the pressure conveying tank 9; the pressure feed tank 9 is connected to the post-treatment plant 10 via an outlet valve 11 and a pipeline.
The material pipeline is mirror polished, and the polishing roughness is less than or equal to 0.2 mu m.
The design pressure of the pressure conveying tank 9 is 0.8MPa, and the take-off pressure of the safety valve 5 is 0.7 MPa.
When the utility model is used, the method comprises the following steps:
(1) 1500kg of deionized water, 60kg of emulsifier, 750kg of ethyl acrylate, 50kg of ethyl methacrylate, 150kg of n-butyl acrylate and 50kg of crosslinking monomer are mixed and then subjected to polymerization reaction in a polymerization kettle 1, after the reaction is finished, a cut-off valve A2 at the bottom of the polymerization kettle 1 is opened, latex is observed from a sight glass 3, when no latex exists in the sight glass 3, the cut-off valve A2 is closed, and then the polymerization kettle 1 can be subjected to the next polymerization reaction;
(2) opening an outlet valve 11 at the bottom of the pressure conveying tank 9, wherein the outlet valve 11 is communicated with a post-treatment workshop 10, arranging an air source system to keep the pressure in the pressure conveying tank 9 at 0.2MPa, and controlling the flow rate at 10 m/min;
(3) observing a liquid level meter 12 on the pressure conveying tank 9, closing an outlet valve 11 at the bottom of the pressure conveying tank 9 when the liquid level is 0, adjusting the opening of a regulating valve group 7 of an air source system to 0, and opening a cut-off valve B4 of an upper pressure relief system to start pressure relief for the pressure conveying tank 9;
(4) when the pressure feed tank 9 is completely depressurized, the cut-off valve B4 of the depressurization system is closed, and the cut-off valve A2 at the bottom of the polymerizer 1 is opened to prepare for the next pressure feed of the latex.
The horizontal distance between the polymerizer 1 of the polymerization plant and the polymerizer of the post-treatment plant 10 is 350 m, the vertical distance is 22 m, and no demulsification phenomenon occurs during transportation.
Claims (5)
1. An emulsion polymerization acrylic rubber latex long distance pressure conveying system, which comprises a polymerization kettle (1), and is characterized in that: the polymerization kettle (1) is connected with the pressure conveying tank (9), and a shut-off valve A (2) and a sight glass (3) are arranged on a pipeline connecting the polymerization kettle (1) and the pressure conveying tank (9); the pressure delivery tank (9) top is equipped with level gauge (12), air supply system and pressure relief system, and the air supply system includes manometer (6), governing valve valves group (7) and check valve (8), and pressure relief system includes trip valve B (4) and relief valve (5).
2. The emulsion polymerized acrylate rubber latex long haul pressure delivery system of claim 1, wherein: the material line requires mirror polishing, and the polishing roughness is less than or equal to 0.2 mu m.
3. The emulsion polymerized acrylate rubber latex long haul pressure delivery system of claim 1, wherein: the design pressure of the pressure conveying tank (9) is 0.8MPa, and the take-off pressure of the safety valve (5) is 0.7 MPa.
4. The emulsion polymerized acrylate rubber latex long haul pressure delivery system of claim 1, wherein: the air source system keeps the pressure in the pressure conveying tank (9) between 0.15MPa and 0.6MPa, and the flow speed is controlled between 10m/min and 15 m/min.
5. The emulsion polymerized acrylate rubber latex long haul pressure delivery system of claim 1, wherein: an outlet valve (11) is arranged below the pressure conveying tank (9), and the pressure conveying tank (9) is connected with the post-processing workshop (10) through the outlet valve (11) and a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122277996.9U CN215722572U (en) | 2021-09-18 | 2021-09-18 | Long-distance pressure conveying system for emulsion polymerization acrylate rubber latex |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122277996.9U CN215722572U (en) | 2021-09-18 | 2021-09-18 | Long-distance pressure conveying system for emulsion polymerization acrylate rubber latex |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215722572U true CN215722572U (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122277996.9U Active CN215722572U (en) | 2021-09-18 | 2021-09-18 | Long-distance pressure conveying system for emulsion polymerization acrylate rubber latex |
Country Status (1)
| Country | Link |
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| CN (1) | CN215722572U (en) |
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2021
- 2021-09-18 CN CN202122277996.9U patent/CN215722572U/en active Active
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