CN218451871U

CN218451871U - Polypropylene solvent evaporator for solution polymerization method

Info

Publication number: CN218451871U
Application number: CN202222878118.7U
Authority: CN
Inventors: 丁书兵; 张聪; 李�根
Original assignee: Shandong High End Chemical Research Institute Co ltd
Current assignee: Shandong High End Chemical Research Institute Co ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-02-07
Anticipated expiration: 2032-10-31

Abstract

The utility model discloses a solution polymerization polypropylene solvent evaporator, bottom position is provided with the baffle in reation kettle, the bottom of reation kettle is separated out the heating chamber with the baffle, be provided with the hot-fluid pipeline in the heating chamber, the hot-fluid flows through the hot-fluid pipeline and makes the hot-fluid pipeline generate heat and rise the temperature in the heating chamber, propylene monomer in the heating chamber heating reation kettle, promote solution polymerization to go on, reation kettle's bottom is provided with auxiliary heat exchanger, be provided with the heating piece in the auxiliary heat exchanger, auxiliary heat exchanger's circulating pipe is linked together with the heating chamber, one side of auxiliary heat exchanger sets up the fan, the output and the heating chamber of fan are linked together, the work of heating piece, it has a definite temperature to keep in the auxiliary heat exchanger, fan work makes hot-air get into the heating chamber in the auxiliary heat exchanger, thereby it freezes the dead condition emergence to have moisture in the hot-fluid pipeline. The arrangement of the auxiliary heat exchanger avoids parking and maintenance, so that the polypropylene can be continuously and safely produced.

Description

Polypropylene solvent evaporator for solution polymerization method

Technical Field

The utility model relates to an evaporimeter technical field, concrete field is a solution polymerization method polypropylene solvent evaporimeter.

Background

The solution polymerization method is carried out in the presence of a solvent, the solvent ensures that the viscosity of the material is not too high, the flowing and the heat transfer of the material are facilitated, and the vaporization of the solvent carries heat out of a reaction zone in a latent heat mode, and the heat returns to the reaction zone after reflux condensation, so that the reaction temperature is controlled. The solution method for producing polypropylene is characterized by that the catalyst component, monomer and solvent are continuously added into polymerization reactor, the unreacted monomer is separated and circulated by means of decompression of solvent, the solvent is additionally supplemented to reduce viscosity of solution, and the residual catalyst is removed by filtration.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a solution polymerization polypropylene solvent evaporator to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a solution polymerization polypropylene solvent evaporator comprises a reaction kettle, wherein a partition plate is arranged at the bottom in the reaction kettle and partitions the bottom of the reaction kettle out of a heating chamber, a hot fluid pipeline is arranged in the heating chamber, two ends of the hot fluid pipeline penetrate out of the side wall of the reaction kettle, two ends of the hot fluid pipeline are an inlet end and an outlet end of the hot fluid pipeline, hot fluid is introduced from the inlet end of the hot fluid pipeline and flows through the hot fluid pipeline, so that the hot fluid pipeline generates heat to raise the temperature in the heating chamber, the heating chamber heats propylene monomers in the reaction kettle and promotes solution polymerization reaction to be carried out, an auxiliary heat exchanger is arranged at the bottom of the reaction kettle, a heating block is arranged in the auxiliary heat exchanger, a circulating pipe of the auxiliary heat exchanger is communicated with the heating chamber, a fan is arranged at one side of the auxiliary heat exchanger, the output end of the fan is communicated with the heating chamber, the heating block works to keep a certain temperature in the auxiliary heat exchanger, hot air in the auxiliary heat exchanger enters the heating chamber when the fan works, so that moisture in the hot fluid pipeline is prevented from freezing, the auxiliary heat exchanger is prevented from being frozen and maintained, and polypropylene can be continuously and safely produced and maintained.

Preferably, the circulating pipe of the auxiliary heat exchanger comprises an air inlet pipe and an air outlet pipe, the air inlet pipe is communicated with the heating chamber, the air outlet pipe is positioned outside the heating chamber, hot air in the auxiliary heat exchanger enters the heating chamber along the air inlet pipe through the work of the fan, so that the situation that moisture in the hot fluid pipeline is frozen and frozen is prevented from occurring, and the air outlet pipe is used for exhausting air to keep the air pressure in the heating chamber normal.

Preferably, the heating block is an electric heating block, the bottom wall of the heating block is fixedly connected with the bottom wall of the inner cavity of the auxiliary heat exchanger, the upper portion of the heating block is located in the inner cavity of the auxiliary heat exchanger, the upper portion of the heating block is of a multi-radiating-fin structure, and the multi-radiating-fin structure enables the heating block to have higher radiating efficiency, and through the work of the heating block, the air in the auxiliary heat exchanger is preheated to be supplied with hot air for use at any time in the heating chamber.

Preferably, the bottom of the reaction kettle is fixedly connected with supporting legs, and the supporting legs support the reaction kettle away from the ground so as to provide an installation space for the arrangement of the auxiliary heat exchanger.

Preferably, the thermal fluid pipeline is in a spiral shape, a plurality of supporting pipe clamps are arranged on the outer side wall of the thermal fluid pipeline, the lower ends of the supporting pipe clamps are fixedly connected with the bottom wall of the heating chamber, and the spiral pipeline has a longer circumference in a certain space and higher heating energy efficiency.

Preferably, the air inlet pipe is provided with a flow regulating valve, the flow regulating valve can regulate the flow of the air inlet pipe, and the flow can be regulated according to needs, so that the auxiliary effect of keeping the temperature of the heating chamber can be accurately met.

Preferably, be provided with on the lateral wall of outlet duct and prevent scalding the sign, the outlet duct can be connected with the heat source tube of heat supply fluid pipeline, avoids the heat source extravagant, prevents scalding the security that the sign further promoted the evaporimeter.

Compared with the prior art, the beneficial effects of the utility model are that: the bottom position is provided with the baffle in reation kettle, the bottom partition of reation kettle is out of the heating chamber with the baffle, be provided with the hot-fluid pipeline in the heating chamber, the lateral wall setting of reation kettle is all worn out at the both ends of hot-fluid pipeline, let in the hot-fluid from the entrance point of hot-fluid pipeline, the hot-fluid flows through the hot-fluid pipeline and makes the hot-fluid pipeline generate heat and rise the temperature in the heating chamber, the propylene monomer in the heating chamber heating reation kettle, promote solution polymerization and go on, reation kettle's bottom is provided with auxiliary heat exchanger, be provided with the heating piece in the auxiliary heat exchanger, auxiliary heat exchanger's circulating pipe is linked together with the heating chamber, one side of auxiliary heat exchanger sets up the fan, the output and the heating chamber of fan are linked together, the heating piece work, it has a definite temperature to keep in the auxiliary heat exchanger, fan work makes the hot-air of auxiliary heat exchanger get into the heating chamber, thereby prevent that the moisture freezes condition from taking place. The arrangement of the auxiliary heat exchanger avoids parking and maintenance, so that the polypropylene can be continuously and safely produced.

Drawings

FIG. 1 is a schematic view of the main structure of the present invention;

fig. 2 is a sectional view of the auxiliary heat exchanger of the present invention;

FIG. 3 is a schematic view of the heating block of the present invention;

FIG. 4 is a top view of the thermal fluid line of the present invention;

fig. 5 is a cross-sectional view in the heating chamber of the present invention.

In the figure: 1-a reaction kettle, 2-a partition plate, 3-a heating chamber, 4-a hot fluid pipeline, 5-an auxiliary heat exchanger, 6-a heating block, 7-a fan, 8-an air inlet pipe, 9-an air outlet pipe, 10-a supporting leg, 11-a supporting pipe clamp and 12-a flow regulating valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example (b):

referring to fig. 1-5, the present invention provides the following technical solutions: a solution polymerization polypropylene solvent evaporator comprises a reaction kettle 1, wherein a partition plate 2 is arranged at the bottom in the reaction kettle 1, the partition plate 2 separates the bottom of the reaction kettle 1 out of a heating chamber 3, a hot fluid pipeline 4 is arranged in the heating chamber 3, two ends of the hot fluid pipeline 4 penetrate out of the side wall of the reaction kettle 1, two ends of the hot fluid pipeline 4 are an inlet end and an outlet end of the hot fluid pipeline 4, hot fluid is introduced from the inlet end of the hot fluid pipeline 4 and flows through the hot fluid pipeline 4, so that the hot fluid pipeline 4 generates heat to raise the temperature in the heating chamber 3, the heating chamber 3 heats propylene monomers in the reaction kettle 1 to promote solution polymerization, an auxiliary heat exchanger 5 is arranged at the bottom of the reaction kettle 1, a heating block 6 is arranged in the auxiliary heat exchanger 5, a circulating pipe of the auxiliary heat exchanger 5 is communicated with the heating chamber 3, a fan 7 is arranged at one side of the auxiliary heat exchanger 5, the output end of the fan 7 is communicated with the heating chamber 3, the heating block 6 works to keep a certain temperature in the auxiliary heat exchanger 5, the auxiliary heat exchanger 5 works to make the auxiliary heat exchanger 5 stop air to enter the heating chamber 3, thereby preventing the auxiliary heat exchanger 4 from freezing, and avoiding the polypropylene from being frozen and being safely overhauled.

Specifically, the circulating pipe of the auxiliary heat exchanger 5 comprises an air inlet pipe 8 and an air outlet pipe 9, the air inlet pipe 8 is communicated with the heating chamber 3, the air outlet pipe 9 is located outside the heating chamber 3, hot air in the auxiliary heat exchanger 5 enters the heating chamber 3 along the air inlet pipe 8 through the work of the fan 7, so that the situation that the hot fluid pipeline 4 is frozen and frozen due to the freezing of moisture is prevented, and the air outlet pipe 9 is used for exhausting air to keep the air pressure in the heating chamber 3 normal.

Specifically, heating block 6 is the electrical heating piece, heating block 6's diapire with auxiliary heat exchanger 5's inner chamber diapire fixed connection, heating block 6's upper portion is located auxiliary heat exchanger 5 inner chamber, just heating block 6's upper portion is many radiating fin structure, and many radiating fin structure make heating block 6 has higher radiating efficiency, through heating block 6 work is right air preheats in the auxiliary heat exchanger 5 to let in the hot-air of use in to heating chamber 3 at any time.

Particularly, the bottom of reaction kettle 1 is fixedly connected with supporting legs 10, supporting legs 10 will reaction kettle 1 props off ground, for auxiliary heat exchanger 5's setting provides installation space.

Specifically, the thermal fluid pipeline 4 is in a spiral shape, a plurality of supporting pipe clamps 11 are arranged on the outer side wall of the thermal fluid pipeline 4, the lower ends of the supporting pipe clamps 11 are fixedly connected with the bottom wall of the heating chamber 3, and the spiral pipeline has a longer circumference in a certain space and higher heating energy efficiency.

Particularly, be provided with flow control valve 12 on the intake pipe 8, flow control valve 12 can adjust the flow of intake pipe 8, and the supplementary effect that satisfies that can be accurate to heating chamber 3 temperature maintenance is adjusted the flow as required.

Particularly, be provided with on the lateral wall of outlet duct 9 and prevent scalding the sign, outlet duct 9 can be connected with the heat source tube coupling of heat supply fluid pipeline 4, avoids the heat source extravagant, prevents scalding the security that the sign further promoted the evaporimeter.

The working principle is as follows: the bottom of the reaction kettle 1 is provided with a partition plate 2, the bottom of the reaction kettle 1 is divided into a heating chamber 3 by the partition plate 2, a hot fluid pipeline 4 is arranged in the heating chamber 3, two ends of the hot fluid pipeline 4 penetrate out of the side wall of the reaction kettle 1, two ends of the hot fluid pipeline 4 are an inlet end and an outlet end of the hot fluid pipeline 4, hot fluid is introduced from the inlet end of the hot fluid pipeline 4 and flows through the hot fluid pipeline 4 to heat the hot fluid pipeline 4 to raise the temperature in the heating chamber 3, the heating chamber 3 heats a propylene monomer in the reaction kettle 1 to promote solution polymerization, the bottom of the reaction kettle 1 is provided with an auxiliary heat exchanger 5, a heating block 6 is arranged in the auxiliary heat exchanger 5, a circulating pipe of the auxiliary heat exchanger 5 is communicated with the heating chamber 3, one side of the auxiliary heat exchanger 5 is provided with a fan 7, the output end of the fan 7 is communicated with the heating chamber 3, the heating block 6 works to keep a certain temperature in the auxiliary heat exchanger 5, hot air in the auxiliary heat exchanger 5 works to enter the heating chamber 3, and therefore the situation that the hot fluid is frozen due to moisture in the heating fluid pipeline 4 is prevented from occurring.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A solution polymerization polypropylene solvent evaporator comprises a reaction kettle (1) and is characterized in that: the bottom position is provided with baffle (2) in reation kettle (1), baffle (2) will reation kettle (1) bottom separates out heating chamber (3), be provided with hot-fluid pipeline (4) in heating chamber (3), the both ends of hot-fluid pipeline (4) are all worn out reation kettle (1)'s lateral wall setting, the both ends of hot-fluid pipeline (4) do the entrance point and the exit end of hot-fluid pipeline (4), reation kettle (1)'s bottom is provided with auxiliary heat exchanger (5), be provided with heating block (6) in auxiliary heat exchanger (5), the circulating pipe of auxiliary heat exchanger (5) with heating chamber (3) are linked together, one side of auxiliary heat exchanger (5) sets up fan (7), the output of fan (7) with heating chamber (3) are linked together.

2. The solvent evaporator for polypropylene according to claim 1, wherein: the circulating pipe of the auxiliary heat exchanger (5) comprises an air inlet pipe (8) and an air outlet pipe (9), the air inlet pipe (8) is communicated with the heating chamber (3), and the air outlet pipe (9) is positioned outside the heating chamber (3).

3. The solvent evaporator for polypropylene solution polymerization process according to claim 2, wherein: the heating block (6) is an electric heating block, the bottom wall of the heating block (6) is fixedly connected with the bottom wall of the inner cavity of the auxiliary heat exchanger (5), the upper portion of the heating block (6) is located in the inner cavity of the auxiliary heat exchanger (5), and the upper portion of the heating block (6) is of a multi-radiating fin structure.

4. A solution polymerization process polypropylene solvent evaporator as recited in any one of claims 1 to 3, wherein: the bottom of the reaction kettle (1) is fixedly connected with supporting legs (10).

5. The solvent evaporator for solution polymerization process polypropylene according to claim 4, wherein: the heating device is characterized in that the thermal fluid pipeline (4) is spiral, a plurality of supporting pipe clamps (11) are arranged on the outer side wall of the thermal fluid pipeline (4), and the lower ends of the supporting pipe clamps (11) are fixedly connected with the bottom wall of the heating chamber (3).

6. The solvent evaporator for polypropylene according to claim 2, wherein: and the air inlet pipe (8) is provided with a flow regulating valve (12).

7. The solvent evaporator for polypropylene according to claim 2, wherein: and an anti-scald mark is arranged on the outer side wall of the air outlet pipe (9).