阅读说明：本技术 一种丙烯汽提塔 (Propylene stripping tower ) 是由 肖霞 郑美娟 许希勤 徐华 于 2021-09-24 设计创作，主要内容包括：本发明提供了一种丙烯汽提塔,其将混合液高效进行气液分离,使得高效获得的纯净的丙烯。其包括：第一分隔导向筒体、第二分隔导向筒体、侧部再沸器、顶部换热器、下部分流筒体、中部入料筒体,中部入料筒体包括有混合入料口；所述中部入料筒体的下方设置有第一分隔导向筒体,所述第一分隔导向筒体的下方设置有所述下部分流筒体,所述第一分隔导向筒体的下部出料口的正下方设置有导向板,所述导向板将所述下部分流筒体分隔成为第一腔体、第二腔体,所述第一腔体的底部设置有第一流出口,所述第二腔体的底部设置有第二流出口；所述下部分流筒体的上部区域设置有回流口。(The invention provides a propylene stripping tower, which can efficiently separate gas and liquid of mixed liquid and efficiently obtain pure propylene. It includes: the system comprises a first separation guide cylinder, a second separation guide cylinder, a side reboiler, a top heat exchanger, a lower partial flow cylinder and a middle feeding cylinder, wherein the middle feeding cylinder comprises a mixed feeding port; a first separation guide cylinder is arranged below the middle feeding cylinder, the lower flow cylinder is arranged below the first separation guide cylinder, a guide plate is arranged right below a lower discharge port of the first separation guide cylinder, the guide plate divides the lower flow cylinder into a first cavity and a second cavity, a first flow outlet is arranged at the bottom of the first cavity, and a second flow outlet is arranged at the bottom of the second cavity; the upper area of the lower part flow cylinder body is provided with a return opening.)

1. A propylene stripping column, characterized in that it comprises:

a first partitioned guide cylinder;

a second partitioned guide cylinder;

a side reboiler;

a top heat exchanger;

a lower part flow cylinder;

the middle feeding barrel comprises a mixed feeding port;

a first separation guide cylinder is arranged below the middle feeding cylinder, the lower flow cylinder is arranged below the first separation guide cylinder, a guide plate is arranged right below a lower discharge port of the first separation guide cylinder, the guide plate divides the lower flow cylinder into a first cavity and a second cavity, a first flow outlet is arranged at the bottom of the first cavity, and a second flow outlet is arranged at the bottom of the second cavity;

the upper area of the lower part flow cylinder body is provided with a return port;

the side reboiler is arranged on the outer side of the lower flow barrel, the second outflow port is communicated to a feeding port of the side reboiler, and an upper discharge port of the side reboiler is connected to a return port through a pipeline;

the upper portion of the middle feeding barrel is provided with a second separation guide barrel, the top of the second separation guide barrel is provided with a top heat exchanger which is vertically arranged, and the top of the top heat exchanger is provided with a gas outlet.

2. A propylene stripping column as claimed in claim 1, characterized in that: and a heat exchanger bracket is arranged on the outer side of the lower part flow cylinder body, and the side reboiler is fixedly arranged on the heat exchanger bracket.

3. A propylene stripping column as claimed in claim 1, characterized in that: the upper portion of middle part pan feeding barrel is the first taper structure of closing up from bottom to top, the diameter of second separation direction barrel is less than the diameter of first separation direction barrel, the bottom of first separation direction barrel is the flaring second taper structure of top-down, the diameter of first separation direction barrel is less than the diameter of lower part flow barrel.

4. A propylene stripping column as claimed in claim 1, characterized in that: and a tower top suspension column is fixedly arranged in a position area between the first separated guide cylinder and the middle feeding cylinder.

5. A propylene stripping column as claimed in claim 1, characterized in that: the bottom of the lower part flow cylinder body is fixedly connected with the upper part of the skirt.

6. A propylene stripping column as claimed in claim 1, characterized in that: and a vortex breaker is arranged at the position of the first outflow port.

7. A propylene stripping column as claimed in claim 1, characterized in that: the inlet of the first cavity is aligned with the lower discharge hole of the first separated guide cylinder, and the second cavity flows the upper gas-liquid mixed liquid into the second cavity through the guide plate.

Technical Field

The invention relates to the technical field of propylene purification, in particular to a propylene stripping tower.

Background

The mixed liquid in the current propylene stripping tower is collected liquid through the reboiler on the lower floor, and then the top exhaust gas and the bottom exhaust liquid are discharged, and then the current propylene stripping tower only exchanges heat and collects liquid through a single reboiler, and the gas-liquid separation is incomplete, so that the concentration of the obtained gas and liquid is impure, and the stripping tower is additionally arranged in the follow-up process, and therefore, a propylene stripping tower capable of efficiently purifying is urgently needed.

Disclosure of Invention

In view of the above problems, the present invention provides a propylene stripping tower that efficiently performs gas-liquid separation on a mixed solution, so that pure propylene can be efficiently obtained.

A propylene stripping column, characterized in that it comprises:

a first partitioned guide cylinder;

a second partitioned guide cylinder;

a side reboiler;

a top heat exchanger;

a lower part flow cylinder;

the middle feeding barrel comprises a mixed feeding port;

a first separation guide cylinder is arranged below the middle feeding cylinder, the lower flow cylinder is arranged below the first separation guide cylinder, a guide plate is arranged right below a lower discharge port of the first separation guide cylinder, the guide plate divides the lower flow cylinder into a first cavity and a second cavity, a first flow outlet is arranged at the bottom of the first cavity, and a second flow outlet is arranged at the bottom of the second cavity;

the upper area of the lower part flow cylinder body is provided with a return port;

the side reboiler is arranged on the outer side of the lower flow barrel, the second outflow port is communicated to a feeding port of the side reboiler, and an upper discharge port of the side reboiler is connected to a return port through a pipeline;

the upper portion of the middle feeding barrel is provided with a second separation guide barrel, the top of the second separation guide barrel is provided with a top heat exchanger which is vertically arranged, and the top of the top heat exchanger is provided with a gas outlet.

It is further characterized in that:

a heat exchanger bracket is arranged on the outer side of the lower part flow cylinder body, and the side reboiler is fixedly arranged on the heat exchanger bracket;

the upper part of the middle feeding barrel is of a first taper structure closing up from bottom to top, the diameter of the second separation guide barrel is smaller than that of the first separation guide barrel, the bottom of the first separation guide barrel is of a second taper structure flaring from top to bottom, and the diameter of the first separation guide barrel is smaller than that of the lower partial flow barrel;

a tower top suspension post is fixedly arranged in a position area between the first separating guide cylinder and the middle feeding cylinder, so that the transfer operation of the whole structure is facilitated;

the bottom of the lower part flow cylinder body is fixedly connected to the upper part of the skirt;

a vortex breaker is arranged at the position of the first outflow port to ensure that liquid smoothly flows out;

the inlet of the first cavity is aligned with the lower discharge hole of the first separated guide cylinder, and the second cavity flows the upper gas-liquid mixed liquid into the second cavity through the guide plate.

After the technical scheme is adopted, mixed liquid flows into the mixed feeding port, part of vapor with liquid flows upwards into the second separated guide cylinder, the liquid is lifted and left to fall through the internal separating device, the gas flows upwards into the top heat exchanger, part of liquid falls again after heat exchange and is discharged through the gas outlet, part of liquid with gas flows downwards into the first separated guide cylinder, the liquid outlet of the first separated guide cylinder flows the liquid into the lower partial flow cylinder, the upper light liquid (with gas) floats upwards and flows into the second cavity through the top of the guide plate, the second cavity feeds the light liquid into the side reboiler to be heated and then separates the liquid and the gas, the separated liquid and gas flow into the upper part of the lower partial flow cylinder through the backflow port again, the liquid is discharged into the first cavity by the passive force, and the gas floats upwards through the first separated guide cylinder, and the purified propylene flows out from the first outflow port, and the mixed liquid is efficiently subjected to gas-liquid separation, so that the pure propylene is efficiently obtained.

Drawings

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

FIG. 2 is an enlarged view of the lower part of the flow cylinder and its assembly structure of the present invention;

FIG. 3 is an enlarged view of the upper region structure of the present invention;

the names corresponding to the sequence numbers in the figure are as follows:

the device comprises a first separation guide cylinder 10, a lower discharge port 11, a second separation guide cylinder 20, a side reboiler 30, a feeding port 31, an upper discharge port 32, a top heat exchanger 40, a gas outlet 41, a lower flow cylinder 50, a first cavity 51, a second cavity 52, a first flow outlet 53, a second flow outlet 54, a return port 55, a middle feeding cylinder 60, a mixed feeding port 61, a guide plate 70, a heat exchanger support 80, a first cone structure 90, a second cone structure 100, a tower top davit 110, a skirt 120, a vortex breaker 130 and an observation window 140.

Detailed Description

A propylene stripper, see figures 1-3: the device comprises a first separated guide cylinder 10, a second separated guide cylinder 20, a side reboiler 30, a top heat exchanger 40, a lower partial flow cylinder 50 and a middle feeding cylinder 60, wherein the middle feeding cylinder 60 comprises a mixed feeding port 61;

a first separating guide cylinder 10 is arranged below the middle feeding cylinder 60, a lower partial flow cylinder 50 is arranged below the first separating guide cylinder 10, a guide plate 70 is arranged right below a lower discharge port of the first separating guide cylinder 10, the guide plate 70 separates the lower partial flow cylinder 50 into a first cavity 51 and a second cavity 52, a first flow outlet 53 is arranged at the bottom of the first cavity 51, and a second flow outlet 54 is arranged at the bottom of the second cavity 52;

the upper region of the lower partial flow cylinder 50 is provided with a return port 55;

the side reboiler 30 is arranged outside the lower part flow cylinder body 50, the second outflow port 54 is communicated to the feeding port 31 of the side reboiler 30, and the upper discharge port 32 of the side reboiler 30 is connected to the return port 55 through a pipeline;

the upper part of the middle feeding cylinder 60 is provided with a second separated guiding cylinder 20, the top of the second separated guiding cylinder 20 is provided with a top heat exchanger 40 which is vertically arranged, and the top of the top heat exchanger 40 is provided with a gas outlet 41.

In specific implementation, a heat exchanger bracket 80 is arranged on the outer side of the lower partial flow cylinder 50, and the side reboiler 30 is fixedly installed on the heat exchanger bracket 80;

the upper part of the middle feeding cylinder body 60 is a first taper structure 90 which closes from bottom to top, the diameter of the second separation guiding cylinder body 20 is smaller than that of the first separation guiding cylinder body 10, the bottom of the first separation guiding cylinder body 10 is a second taper structure 100 which is flared from top to bottom, and the diameter of the first separation guiding cylinder body 10 is smaller than that of the lower part flowing cylinder body 50;

a tower top suspension post 110 is fixedly arranged in a position area between the first separated guide cylinder 10 and the middle feeding cylinder 60, so that the transfer operation of the whole structure is facilitated;

the device also comprises a skirt 120, wherein the bottom of the lower partial flow cylinder 50 is fixedly connected with the upper part of the skirt 120;

the vortex breaker 130 is arranged at the position of the first outflow port 53 to ensure the smooth outflow of the liquid;

in specific implementation, the inlet of the first cavity 51 is aligned with the lower discharge hole 11 of the first separation guide cylinder 10, and the second cavity 52 guides the upper gas-liquid mixture through the guide plate 70;

the bottom of the lower part flow barrel 50 and the feeding periphery of the middle part feeding barrel 60 are respectively provided with an observation window 140, so that the internal condition can be known in time and can be quickly treated.

In the specific implementation: four layers of guide partition plates are vertically arranged in the first separated guide cylinder body 10, and sixteen layers of guide partition plates are arranged in the second separated guide cylinder body 20.

The working principle is as follows: the mixed liquid flows into the mixed feeding port, part of vapor with liquid flows upwards into the second separated guide cylinder, the liquid is lifted and left to fall through an internal separating device, the gas enters the top heat exchanger upwards, part of liquid falls again after heat exchange, gas is discharged only through a gas outlet, part of liquid with gas flows downwards into the first separated guide cylinder, the liquid outlet of the first separated guide cylinder flows the liquid into the lower partial flow cylinder, the light liquid (with gas) on the upper layer floats upwards and flows into the second cavity through the top of the guide plate, the light liquid is heated by the side reboiler through the second cavity and then is separated into liquid and gas, the separated liquid and gas flow into the upper part of the lower partial flow cylinder through the backflow port again, the liquid is discharged into the first cavity by passive force, and the gas floats upwards through the first separated guide cylinder until being discharged after heat exchange by the top heat exchanger, the purified propylene flows out of the first outflow port, and the mixed liquid is subjected to gas-liquid separation efficiently, so that the purified propylene is obtained efficiently.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.