CN114210126A - Device for online cleaning polymer in acetonitrile - Google Patents

Device for online cleaning polymer in acetonitrile Download PDF

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Publication number
CN114210126A
CN114210126A CN202111401479.6A CN202111401479A CN114210126A CN 114210126 A CN114210126 A CN 114210126A CN 202111401479 A CN202111401479 A CN 202111401479A CN 114210126 A CN114210126 A CN 114210126A
Authority
CN
China
Prior art keywords
filter
detachable
acetonitrile
valve
storage space
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111401479.6A
Other languages
Chinese (zh)
Inventor
陈晓雷
张武娟
范立成
赵志东
郑伟
王海涛
张延涛
姜翠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
North Huajin Chemical Industries Co Ltd
Original Assignee
North Huajin Chemical Industries Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by North Huajin Chemical Industries Co Ltd filed Critical North Huajin Chemical Industries Co Ltd
Priority to CN202111401479.6A priority Critical patent/CN114210126A/en
Publication of CN114210126A publication Critical patent/CN114210126A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/56Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D11/00Solvent extraction
    • B01D11/04Solvent extraction of solutions which are liquid
    • B01D11/0492Applications, solvents used
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/31Self-supporting filtering elements
    • B01D29/35Self-supporting filtering elements arranged for outward flow filtration
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D3/00Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/34Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
    • B01D3/40Extractive distillation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D36/00Filter circuits or combinations of filters with other separating devices

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The invention belongs to the technical field of chemical production equipment maintenance, and discloses a device for online cleaning a polymer in acetonitrile, which comprises a filter shell, a detachable filter element, a first filter screen, a second filter screen, an inlet pipeline, an outlet pipeline and a power pump, wherein the filter shell is provided with a filter core; one end of the inlet pipeline is communicated with the bottom of the desorption tower, and the other end of the inlet pipeline is communicated with the upper end of the side wall of the filter shell; the filter shell is a cylinder with an opening at the bottom, a detachable bottom cover is arranged at the bottom of the cylinder, the detachable filter element is arranged in the filter shell, the detachable filter element is a cylinder with an oblique opening at the top, and the side wall of the detachable filter element is provided with a first filter screen; the side wall of the filter shell is also provided with a cylindrical bulge, and a second filter screen is arranged in the cylindrical bulge; one end of the outlet pipeline is communicated with the cylindrical bulge, and the other end of the outlet pipeline is connected with the power pump. The invention can effectively filter and clean the polymer in the acetonitrile, and prevent the polymer from blocking the tower tray and the heat exchanger.

Description

Device for online cleaning polymer in acetonitrile
Technical Field
The invention belongs to the technical field of chemical production equipment maintenance, and particularly relates to a device for online cleaning a rubbery polymer in a butadiene device solvent acetonitrile.
Background
The butadiene device adopts an acetonitrile extraction method to produce butadiene, namely, the butadiene is separated from the four-fraction of the byproduct carbon of the ethylene device by using acetonitrile as a solvent and utilizing an extractive distillation and rectification method.
T-102 is a solvent analysis tower, two reboilers which use steam as a heat source are arranged at the bottom of the solvent analysis tower, the mixed material of butadiene and acetonitrile at the top of the tower is heated by the reboilers and then is separated due to different boiling points, the butadiene with low boiling point is changed into a gas phase to be separated from acetonitrile at the bottom of the tower, namely the solvent acetonitrile and the butadiene are separated in the T102 solvent analysis tower, the acetonitrile is arranged at the bottom of the T102 solvent analysis tower as a liquid phase, and the butadiene rises to the top of the tower as a gas phase. Media such as solvent acetonitrile, butadiene and the like in the tower can be polymerized into rubber-like polymers by heating energy, so that the rubber-like polymers exist in the solvent acetonitrile, and the rubber-like polymers can block a T-102 tray, a T-102 tower bottom heat exchanger and a T-102 tower kettle pump along with the circulating feeding of the solvent acetonitrile in the actual production, so that the production cannot be continued, the shutdown is necessary for overhauling and cleaning, and great economic loss is caused.
Disclosure of Invention
The invention aims to provide a device for cleaning a polymer in acetonitrile on line, which aims to solve the technical problem that the normal operation of a butadiene device is influenced because a solvent acetonitrile contains a rubber-like polymer.
In order to solve the technical problems, the device for online cleaning the polymer in the acetonitrile has the following specific technical scheme:
a device for cleaning polymers in acetonitrile on line comprises a filter shell, a first storage space, a second storage space, a third storage space, a first filter screen, a second filter screen, an inlet pipeline, a first valve, an outlet pipeline, a second valve and a power pump;
one end of the inlet pipeline is communicated with the bottom of the analysis tower, the other end of the inlet pipeline is communicated with the upper end of the side wall of the filter shell, and a first valve is arranged on the inlet pipeline;
the filter shell is a cylinder with an opening at the bottom, a detachable bottom cover is arranged at the bottom of the cylinder, the detachable filter element is arranged in the filter shell, the detachable filter element is a cylinder with an oblique top opening, a first storage space is arranged inside the detachable filter element, a first filter screen is arranged on the side wall of the detachable filter element, and a second storage space is arranged between the side wall of the detachable filter element and the filter shell;
further, the side wall of the filter shell is provided with a cylindrical protrusion, a second filter screen is arranged in the cylindrical protrusion, and the second filter screen is enclosed into a third storage space in the cylindrical protrusion.
One end of the outlet pipeline is communicated with the third storage space, the other end of the outlet pipeline is connected with the power pump, and a second valve is arranged on the outlet pipeline.
The invention also comprises a bypass line with one end arranged in front of the first valve of the inlet line and the other end arranged behind the second valve of the outlet line, and a third valve arranged on the bypass line.
Still include the manometer, firstly fall and drench and the second falls and drench, the manometer and first fall drench filter housing top, the second falls to drench and sets up on filter housing detachable bottom cover.
Further, the second filter screen is an activated carbon filter screen.
The device for online cleaning the polymer in the acetonitrile has the following advantages: the rubber-like polymer in acetonitrile can be effectively filtered and cleaned, so that the rubber-like polymer is prevented from blocking a tray and a heat exchanger, and the running time of a butadiene device is prolonged.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for on-line cleaning of polymer in acetonitrile according to the present invention.
Detailed Description
In order to better understand the purpose, structure and function of the invention, the device for on-line cleaning polymer in acetonitrile of the invention is described in detail with reference to the attached drawings.
As shown in fig. 1, the apparatus for on-line cleaning polymer in acetonitrile of this embodiment is disposed at the outlet of acetonitrile at the bottom of a T102 solvent resolving tower 16, and comprises a filter housing 1, a first storage space 2, a second storage space 3, a third storage space 4, a first filter screen 13, a second filter screen 5, an inlet pipeline 6, a first valve 7, an outlet pipeline 9, a second valve 8 and a power pump 17;
one end of the inlet pipeline 6 is communicated with the bottom of the desorption tower 16, the other end of the inlet pipeline is communicated with the upper end of the side wall of the filter shell 1, and a first valve 7 is arranged on the inlet pipeline 6; the filter shell 1 is a cylinder with an opening at the bottom, a detachable bottom cover is arranged at the bottom of the cylinder, a detachable filter element is arranged in the filter shell 1, the detachable filter element is a cylinder with an oblique top opening, a first storage space 2 is arranged inside the detachable filter element, a first filter screen 13 is arranged on the side wall of the detachable filter element, and a second storage space 3 is arranged between the side wall of the detachable filter element and the filter shell 1; further, a cylindrical protrusion is arranged on the side wall of the filter shell 1, a second filter screen 5 is arranged in the cylindrical protrusion, and the second filter screen 5 surrounds a third storage space 4 in the cylindrical protrusion; one end of the outlet pipeline 9 is communicated with the third storage space 4, the other end of the outlet pipeline is connected with the power pump 17, and the outlet pipeline 9 is provided with a second valve 8.
In the technical scheme of this embodiment, power pump 17 provides the power supply for the circulation of acetonitrile in whole device, open first valve 7 and second valve 8 during the use, the solvent acetonitrile of desorption tower 16 bottom at first gets into the first storage space 2 that can dismantle the filter core through inlet line 6, then cross the rubber-like polymer of big granule through first filter screen 13 filtration, acetonitrile flows into second storage space 3, filter the tiny polymer impurity in the solvent acetonitrile through second filter screen 5, discharge the acetonitrile after filtering to butadiene device's heat exchanger 18 in through third storage space 4, thereby realize clearing up the polymer in the acetonitrile on line. The second screen 5 may be an activated carbon screen.
Because acetonitrile can volatilize under high temperature, the acetonitrile that volatilizes is harmful to the human body, and this embodiment is still filter housing 1 top is provided with manometer 10 and first falls and drenches 12, is provided with the second on the detachable bottom of filter housing 1 bottom and falls and drenches 11, and when absorbent impurity was too much on first filter screen 13, the pressure that manometer 10 instructed can rise and the pointer can take place the shake, just at this moment need change the filter core of dismantling. First valve 7 is closed at first during the change, closes second valve 8 after treating that the liquid in the filter housing 1 is whole to be discharged, opens first pouring 12 afterwards and lets in nitrogen gas, drenches 11 through the second and replaces the inside gas that contains the acetonitrile steam of filter housing 1 to the safe container in, opens the removable bottom of filter housing 1 bottom after the replacement and changes the filter core that can dismantle.
In order to ensure that the normal operation of the butadiene unit is not affected when the removable filter cartridge is replaced, a bypass line 14 and a third valve 15 are provided, the bypass line 14 being arranged at one end in front of the first valve 7 of the inlet line 6 and at the other end behind the second valve 8 of the outlet line 9, the third valve 15 being arranged on the bypass line 14. When the detachable filter element is replaced, the third valve 15 is opened, acetonitrile directly flows into the heat exchanger 18 of the butadiene device from the bypass pipeline 14, and normal circulation of the solvent acetonitrile in the butadiene device is not influenced when the cleaning device for polymers in the acetonitrile is overhauled.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the principles of the invention, and these should be considered to fall within the scope of the invention.

Claims (4)

1. A device for cleaning polymers in acetonitrile on line is characterized by comprising a filter shell (1), a detachable filter element, a first storage space (2), a second storage space (3), a third storage space (4), a first filter screen (13), a second filter screen (5), an inlet pipeline (6), a first valve (7), an outlet pipeline (9), a second valve (8) and a power pump (17);
one end of the inlet pipeline (6) is communicated with the bottom of the desorption tower (16), the other end of the inlet pipeline is communicated with the upper end of the side wall of the filter shell (1), and a first valve (7) is arranged on the inlet pipeline (6);
the filter shell (1) is a cylinder with an opening at the bottom, a detachable bottom cover is arranged at the bottom of the cylinder, a detachable filter element is arranged in the filter shell (1), the detachable filter element is a cylinder with an oblique top opening, a first storage space (2) is arranged inside the detachable filter element, a first filter screen (13) is arranged on the side wall of the detachable filter element, and a second storage space (3) is arranged between the side wall of the detachable filter element and the filter shell (1);
the side wall of the filter shell (1) is also provided with a cylindrical bulge, a second filter screen (5) is arranged in the cylindrical bulge, and the second filter screen (5) surrounds a third storage space (4) in the cylindrical bulge; one end of the outlet pipeline (9) is communicated with the third storage space (4), the other end of the outlet pipeline is connected with the power pump (17), and the outlet pipeline (9) is provided with a second valve (8).
2. The apparatus for in-line cleaning of polymer in acetonitrile according to claim 1, further comprising a bypass line (14) and a third valve (15), wherein one end of the bypass line (14) is arranged in front of the first valve (7) of the inlet line (6), the other end is arranged behind the second valve (8) of the outlet line (9), and the third valve (15) is arranged on the bypass line (14).
3. The device for online cleaning of the polymer in the acetonitrile according to claim 1, further comprising a pressure gauge (10), a first pouring shower (12) and a second pouring shower (11), wherein the pressure gauge (10) and the first pouring shower (12) are arranged on the top of the filter housing (1), and the second pouring shower (11) is arranged on a detachable bottom cover of the filter housing (1).
4. The device for on-line cleaning of polymers in acetonitrile according to claim 1, wherein the second screen (5) is an activated carbon screen.
CN202111401479.6A 2021-11-19 2021-11-19 Device for online cleaning polymer in acetonitrile Pending CN114210126A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111401479.6A CN114210126A (en) 2021-11-19 2021-11-19 Device for online cleaning polymer in acetonitrile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111401479.6A CN114210126A (en) 2021-11-19 2021-11-19 Device for online cleaning polymer in acetonitrile

Publications (1)

Publication Number Publication Date
CN114210126A true CN114210126A (en) 2022-03-22

Family

ID=80698047

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111401479.6A Pending CN114210126A (en) 2021-11-19 2021-11-19 Device for online cleaning polymer in acetonitrile

Country Status (1)

Country Link
CN (1) CN114210126A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1216739A1 (en) * 2000-12-21 2002-06-26 Nelson Industries, Inc. Extended life combination filter
CN202290301U (en) * 2011-10-08 2012-07-04 中国石油化工股份有限公司 Self-flushing magnetic barrel-type reversed filter and self-flushing system consisting of same
CN209108644U (en) * 2018-10-26 2019-07-16 天津星马克科技发展有限公司 A kind of acetonitrile distillation system with filter mechanism
CN210751357U (en) * 2019-09-05 2020-06-16 北方华锦化学工业股份有限公司 Control device for preventing blockage of reboiler at tower bottom of solvent resolution tower of butadiene device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1216739A1 (en) * 2000-12-21 2002-06-26 Nelson Industries, Inc. Extended life combination filter
CN202290301U (en) * 2011-10-08 2012-07-04 中国石油化工股份有限公司 Self-flushing magnetic barrel-type reversed filter and self-flushing system consisting of same
CN209108644U (en) * 2018-10-26 2019-07-16 天津星马克科技发展有限公司 A kind of acetonitrile distillation system with filter mechanism
CN210751357U (en) * 2019-09-05 2020-06-16 北方华锦化学工业股份有限公司 Control device for preventing blockage of reboiler at tower bottom of solvent resolution tower of butadiene device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
中华人民共和国公安部消防局编: "《中国消防手册 第4卷 生产加工防火》", 28 February 2008 *

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Application publication date: 20220322

RJ01 Rejection of invention patent application after publication