CN218793941U

CN218793941U - 40000 ton/year thioether rectification equipment

Info

Publication number: CN218793941U
Application number: CN202222895967.3U
Authority: CN
Inventors: 刘永杰; 田云清; 吴炜; 李涛; 谭进; 向正军
Original assignee: Xinjiang Xingfa Chemical Co ltd
Current assignee: Xinjiang Xingfa Chemical Co ltd
Priority date: 2022-11-01
Filing date: 2022-11-01
Publication date: 2023-04-07
Anticipated expiration: 2032-11-01

Abstract

The utility model discloses a 40000 ton/year thioether rectification equipment, including thioether rectifying column, thioether rectifying column feed inlet and feed line connection, feed line and one of them heat transfer area intercommunication of heat exchanger, thioether rectifying column bottom discharge gate is connected with reboiler feed end through discharge line, reboiler bottom discharge end and feed line connection, feed line and another heat transfer area intercommunication of heat exchanger, reboiler top discharge end is connected with thioether rectifying column first return opening through first return line, thioether rectifying column top discharge gate is connected with condenser feed end through discharge line, condenser liquid outlet communicates with the second return line through going out the liquid pipeline, the condenser gas outlet passes through the exhaust pipe line and is connected with the buffer tank, buffer tank bottom liquid outlet and second return line one end intercommunication, the second return line other end is connected with thioether rectifying column second return opening; the utility model discloses can produce the refined thioether product of high quality, high yield steadily.

Description

40000 ton/year thioether rectification equipment

Technical Field

The utility model relates to a dimethyl sulfide production preparation field specifically indicates a thioether rectification equipment of 40000 tons/year.

Background

The industrial refining of dimethyl sulfide is an apparatus for purification by azeotropic principle. The method comprises the steps of feeding crude dimethyl sulfide to the middle of a thioether rectification tower in a metering mode by a material pump, using steam at the bottom of the rectification tower, heating a reboiler, and carrying out vaporization and rectification on the crude thioether by using the physical characteristics that the boiling points of substances are different and the boiling point of the thioether is lower than that of water according to the azeotropic principle. In the prior art, due to the reasons of condensation temperature, evaporation capacity control, pressure fluctuation and the like, backflow extraction is unstable, and the quality and the yield of products are seriously influenced.

Disclosure of Invention

The utility model aims to overcome the defects and provide a 40000 ton/year thioether rectification device which can stably produce high-quality and high-yield refined thioether products.

The utility model discloses a solve above-mentioned technical problem, the technical scheme who adopts is: the utility model provides a 40000 ton/year thioether rectification equipment, includes thioether rectifying column, thioether rectifying column feed inlet and feed line connection, feed line and one of them heat transfer area intercommunication of heat exchanger, thioether rectifying column bottom discharge gate passes through discharge pipeline and is connected with the reboiler feed end, reboiler bottom discharge end and feed line connection, feed line and another heat transfer area intercommunication of heat exchanger, reboiler top discharge end is connected with the first backflow mouth of thioether rectifying column through first backflow pipeline, thioether rectifying column top discharge gate is connected with the condenser feed end through arranging the material pipeline, the condenser liquid outlet passes through liquid outlet pipeline and second backflow pipeline intercommunication, the condenser gas outlet passes through the exhaust pipe line and is connected with the buffer tank, buffer tank bottom liquid outlet and second backflow pipeline one end intercommunication, the second backflow pipeline other end is connected with thioether rectifying column second backflow mouth.

Preferably, the second return line is further provided with a thioether return tank and a return pump.

Preferably, the top of the buffer tank is connected with a tail gas pipeline.

Preferably, the heat exchanger is a shell and tube heat exchanger, the feed line is communicated with the shell side region of the heat exchanger, the feed line is communicated with the upper and lower end regions of the shell, and the upper and lower end regions of the shell are communicated with the shell and tube.

Preferably, the discharge end of the feed pipeline is divided into a plurality of pipelines to be connected with the feed inlet of the thioether rectification tower.

Preferably, the condenser is provided with a plurality of condensers which are connected in series.

The utility model has the advantages that:

the utility model discloses the device has improved dimethyl sulfide's productivity, has guaranteed the relative stability of tower top bottom temperature, pressure and each component, realizes the continuous stability in the production process simultaneously, and then improves the quality and the output of product, reduces the wasting of resources.

Drawings

FIG. 1 is a schematic diagram of a 40000 t/year thioether rectification apparatus;

fig. 2 is a schematic view of the internal structure of the heat exchanger in fig. 1.

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments.

As shown in fig. 1 and 2, a 40000 ton/year thioether rectification apparatus comprises a thioether rectification column 1, wherein a feed inlet of the thioether rectification column 1 is connected with a feed pipeline 2, the feed pipeline 2 is communicated with one of heat exchange areas of a heat exchanger 3, a bottom discharge outlet of the thioether rectification column 1 is connected with a feed end of a reboiler 5 through a discharge pipeline 4, a bottom discharge end of the reboiler 5 is connected with a feed pipeline 6, the feed pipeline 6 is communicated with the other heat exchange area of the heat exchanger 3, a top discharge end of the reboiler 5 is connected with a first reflux port of the thioether rectification column 1 through a first reflux pipeline 7, a top discharge outlet of the thioether rectification column 1 is connected with a feed end of a condenser 9 through a discharge pipeline 8, a liquid outlet of the condenser 9 is communicated with a second reflux pipeline 11 through a liquid outlet pipeline 10, a gas outlet of the condenser 9 is connected with a buffer tank 13 through a gas exhaust pipeline 12, a bottom liquid outlet of the buffer tank 13 is communicated with one end of the second reflux pipeline 11, and the other end of the second reflux pipeline 11 is connected with a second reflux port of the thioether rectification column 1.

Preferably, the second return line 11 is further provided with a thioether return tank 11.1 and a return pump 11.2.

Preferably, the top of the buffer tank 13 is connected with a tail gas pipeline 14.

Preferably, the condenser 9 is a shell and tube heat exchanger, the feed line 2 communicates with a side region of the shell 3.1 of the heat exchanger 3, the feed line 6 communicates with upper and lower end regions of the shell 3.1, and the upper and lower end regions of the shell 3.1 communicate with the shell 3.2. In this embodiment, since the temperature of the material in the feeding line 6 is higher than that of the material in the feeding line 2, the feeding temperature can be effectively increased and the feeding temperature can be decreased by exchanging heat between the two in the heat exchanger 3.1. In this embodiment, the high-temperature material in the feed line 6 firstly enters the lower end area of the heat exchanger 3.1, then passes through the tubes 3.2, the low-temperature material introduced from the right side of the feed line 2 enters the side area of the shell 3.1, and then exchanges heat with the tubes 3.2 in the shell, so that the low-temperature material in the feed line 2 is heated and finally enters the feed inlet of the thioether rectification tower 1, and the high-temperature material in the feed line 6 is cooled and comes out from the upper end area of the heat exchanger 3.1, so as to obtain a refined thioether finished product. As shown in the figure, the heat exchanger 3 is of a tube type heat exchanger structure, the upper end and the lower end of the shell 3.1 are both provided with a sealing disc, and the upper end and the lower end of the tube 3.2 both penetrate through the sealing disc to be communicated with the upper end region and the lower end region of the shell 3.1.

Preferably, the discharge end of the feed line 2 is divided into a plurality of lines to be connected with the feed inlet of the thioether rectification tower 1. In this embodiment, the discharge end of the feeding pipeline 2 is divided into three pipelines to enter the thioether rectification tower 1, so that the contact area can be enlarged, and the rectification efficiency can be improved.

Preferably, the condenser 9 is provided in plurality and connected in series. Preferably, this embodiment uses two condensers 9, of which the cold medium jacket of the first condenser 9 is filled with circulating cold water (25 ℃) and the cold medium jacket of the second condenser 9 is filled with circulating low-temperature water (5-12 ℃).

The working principle of the embodiment is as follows:

crude thioether in a thioether reflux tank 11.1 enters a thioether rectification tower 1 through a reflux pump 11.2, the bottom of the thioether rectification tower 1 is extracted and enters a reboiler 5 through a discharge pipeline 4, one part of the crude thioether flows back to a first reflux port of the thioether rectification tower 1 through a first reflux pipeline 7, the other part of the crude thioether enters a heat exchanger 3, and a refined thioether finished product is obtained after heat exchange, specifically, a high-temperature material in a feeding pipeline 6 firstly enters the lower end area of the heat exchanger 3.1, then passes through a row pipe 3.2 of the heat exchanger, a low-temperature material introduced from the right side of the feeding pipeline 2 enters the side area of a shell 3.1 and then exchanges heat with the row pipe 3.2 in the shell, so that the low-temperature material in the feeding pipeline 2 is heated and finally enters a feeding port of the thioether rectification tower 1, the high-temperature material in the feeding pipeline 6 is cooled, and the high-temperature material comes out of the upper end area of the heat exchanger 3.1 to obtain the refined thioether finished product; the mixed gas at the top of the thioether rectification tower 1 is condensed twice through the condensers 9 which are connected in sequence, the lower parts of the condensers 9 are provided with condensed liquid outlets, the condensed liquid outlets are communicated with the second backflow pipeline 11 through the liquid outlet pipeline 10, the condensed liquid outlets can be finally collected into the thioether backflow tank 11.1, the liquid mixture discharged from the exhaust port at the upper part of the condensers 9 enters the buffer tank 13 through the exhaust pipeline 12, after buffering, tail gas is discharged from the tail gas pipeline 14 at the top of the buffer tank, the liquid is reserved in the buffer tank 13, corresponding valves on the pipelines are opened, and the liquid in the buffer tank 13 can flow into the thioether backflow tank 11.1 to be further rectified.

The tower height of the thioether rectification tower is 30.46m, and the volume is24.1m ³ During operation, the temperature at the top of the tower is guaranteed to be 40-65 ℃, the temperature at the bottom of the tower is 60-80 ℃, the pressure is controlled to be 170-200kPa, the feeding amount of the crude thioether is 6800kg/h, the extraction amount is 4500kg/h, and the main content of the extracted refined thioether is more than or equal to 99.95 percent.

The above embodiments are only preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the embodiments and features in the embodiments in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the equivalents of the technical features in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims

1. A 40000 ton/year thioether rectification apparatus comprising a thioether rectification column (1), characterized in that: the feed inlet of the thioether rectification tower (1) is connected with a feed pipeline (2), the feed pipeline (2) is communicated with one of the heat exchange areas of the heat exchanger (3), the bottom discharge outlet of the thioether rectification tower (1) is connected with the feed end of a reboiler (5) through a discharge pipeline (4), the bottom discharge end of the reboiler (5) is connected with a feed pipeline (6), the feed pipeline (6) is communicated with the other heat exchange area of the heat exchanger (3), the top discharge end of the reboiler (5) is connected with a first reflux port of the thioether rectification tower (1) through a first reflux pipeline (7), the top discharge outlet of the thioether rectification tower (1) is connected with the feed end of a condenser (9) through a discharge pipeline (8), the liquid outlet of the condenser (9) is communicated with a second reflux pipeline (11) through a liquid outlet pipeline (10), the gas outlet of the condenser (9) is connected with a buffer tank (13) through a gas exhaust pipeline (12), the bottom liquid outlet of the buffer tank (13) is communicated with one end of the second reflux pipeline (11), and the other end of the thioether rectification tower (1) is connected with the second reflux port.

2. The thioether rectification apparatus of claim 1, wherein: and a thioether reflux tank (11.1) and a reflux pump (11.2) are also arranged on the second reflux pipeline (11).

3. The thioether rectification apparatus of claim 1, wherein: the top of the buffer tank (13) is connected with a tail gas pipeline (14).

4. A 40000 ton/year thioether rectification apparatus according to claim 3, wherein: the heat exchanger (3) is a shell and tube heat exchanger, the feeding pipeline (2) is communicated with the side area of a shell (3.1) of the heat exchanger (3), the feeding pipeline (6) is communicated with the upper end area and the lower end area of the shell (3.1), and the upper end area and the lower end area of the shell (3.1) are communicated with the shell (3.2).

5. The thioether rectification apparatus according to claim 1, wherein: the discharge end of the feed pipeline (2) is divided into a plurality of pipelines to be connected with the feed inlet of the thioether rectification tower (1).

6. The thioether rectification apparatus of claim 1, wherein: the condenser (9) is provided with a plurality of condensers which are connected in series.