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WO2015185136A1 - Système et procédé de préparation d'un liquide de lavage - Google Patents

Système et procédé de préparation d'un liquide de lavage Download PDF

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Publication number
WO2015185136A1
WO2015185136A1 PCT/EP2014/061638 EP2014061638W WO2015185136A1 WO 2015185136 A1 WO2015185136 A1 WO 2015185136A1 EP 2014061638 W EP2014061638 W EP 2014061638W WO 2015185136 A1 WO2015185136 A1 WO 2015185136A1
Authority
WO
WIPO (PCT)
Prior art keywords
washing liquid
pressure
wash tank
centrifuge unit
line section
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.)
Ceased
Application number
PCT/EP2014/061638
Other languages
German (de)
English (en)
Inventor
Mark REDMANN
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.)
Dr-Ing K Busch GmbH
Original Assignee
Dr-Ing K Busch GmbH
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 Dr-Ing K Busch GmbH filed Critical Dr-Ing K Busch GmbH
Priority to PCT/EP2014/061638 priority Critical patent/WO2015185136A1/fr
Publication of WO2015185136A1 publication Critical patent/WO2015185136A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1425—Regeneration of liquid absorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1487—Removing organic compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/10—Inorganic absorbents
    • B01D2252/103—Water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/20—Organic absorbents
    • B01D2252/202—Alcohols or their derivatives
    • B01D2252/2023—Glycols, diols or their derivatives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/20—Organic absorbents
    • B01D2252/202—Alcohols or their derivatives
    • B01D2252/2023—Glycols, diols or their derivatives
    • B01D2252/2026—Polyethylene glycol, ethers or esters thereof, e.g. Selexol
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents

Definitions

  • the present invention relates to a system and a method for treating a scrubbing liquid from a scrubber, in particular for the treatment of a scrubbing liquid when washing a medium such as gas or steam from a plastics processing plant.
  • the continuous processing of plastics is in many cases in processing units, in which liquid or solid plastics are supplied.
  • the processing of plastics within the processing units releases gaseous substances, the z.
  • As a degradation product of the plastic hydrocarbons, solvents from the manufacturing process and substances such as water or air escape.
  • a vacuum i. H. a negative pressure
  • the gas scrubber has a scrubbing liquid which is injected into the substances which are thereby purified.
  • condensable and crystallizable gas components are separated from the substances and deposited in the washing liquid.
  • different washing media are used.
  • the washing media can z. B. be cleaned in a treatment system with a closed circuit for the washing media.
  • For processing z. B. filters are used.
  • EP 2364760 A1 is z.
  • a system is shown in which an exhaust pipe passes through a scrubber with washing liquid, whereby the exhaust gas is treated.
  • the scrubber may be connected to a reservoir for the scrubbing liquid so that the scrubbing liquid is pumped from the reservoir through the scrubber and back into the reservoir.
  • a treatment circuit for the treatment of the washing liquid has a Zentrifugeabscheider, in which the washing liquid is pumped out of the scrubber. Out the separator, the treated washing liquid is returned to the reservoir or directly back into the scrubber.
  • the washing liquid can be pumped by a pump of the centrifuge or a separate pump in the scrubber.
  • the treated scrubbing liquid from the treatment circuit can be mixed with the contaminated scrubbing liquid from the scrubber in the reservoir.
  • the scrubber supplied washing liquid therefore has a low degree of purity.
  • additional pumping units are required, or the Zentrifugenabscheider must be designed according to the required pump power.
  • Such a system is not very suitable for washing media, as they are used for the purification of gas-vapor mixtures from the plastics processing.
  • a scrubber scrubbing system comprises a scrubbing tank with scrubbing liquid, a centrifuge unit for scrubbing contaminants from the scrubbing liquid, and a conduit loop in which scrubbing liquid is passed from the scrubbing tank to the centrifuge unit and back into the scrubbing tank.
  • the wash tank can be part of the scrubber.
  • the scrubber may include other units, such as a reservoir for additives, a packed bed, and the like.
  • the washing liquid may be a low-viscosity medium, such as oils and glycols (mono-, di- or triethylene glycol), or else water. Depending on the medium to be washed and the holding impurities and substances, a suitable washing liquid is selected.
  • the conduit loop forms a closed loop in which the wash liquid can be used over several cycles.
  • the washing liquid there is an operating pressure p 0 in the wash tank and a pressure pi in the centrifuge unit which is higher than the operating pressure p 0 .
  • no control units for regulating the flow of the washing liquid are provided in the line section from the centrifuge unit to the wash tank.
  • a control unit for. B. in the form of a throttle, be provided to regulate the injection quantity of washing liquid in the wash tank.
  • an operating pressure p 0 is present in the wash tank and a pressure pi in the centrifuge unit which is higher than the operating pressure p 0 .
  • an operating pressure p 0 is therefore applied in the scrubbing tank.
  • the washing liquid is transferred from the wash tank of the scrubber through a first line section from the wash tank into the centrifuge unit.
  • a pressure pi which rests in the centrifuge unit and is higher than the operating pressure p 0 .
  • the deposition of impurities and undesired substances from the washing liquid takes place.
  • the recycled washing liquid is returned from the centrifuge unit to the wash tank through a second line section extending from the centrifuge unit to the wash tank by the increased pressure p-, compared to a pressure p 2 applied in the second line section. in the centrifuge unit.
  • the second Line section is advantageously a pressure p 2 less than the pressure p-, the centrifuge unit, so that the treated washing liquid is sucked out of the centrifuge unit.
  • the pressure p 2 , the operating pressure p 0 as it is present in the wash tank.
  • the washing liquid can be directed to save energy without the use of other active drive devices in the wash tank.
  • the system for treating a washing liquid in the first line section of the line circuit from the wash tank to the centrifuge unit comprises a pressure generator, for. B. in the form of a pump on, in the washing liquid the pressure p- generated.
  • the treatment system can be connected to a vacuum generator, generally referred to as a vacuum generator, to which in turn the wash tank for generating the operating pressure p 0 is connected in the wash tank.
  • a vacuum generator is used, as it is used in a plastics processing plant, to aspirate a medium to be washed from a processing unit of the plant in which the gas is formed.
  • the medium to be washed can be sucked out of the processing unit by a discharge at the operating pressure p 0 .
  • the treatment system in particular the wash tank of a scrubber, is connected to the vacuum generator, z. B. the system is provided in the derivative, so that the operating pressure p 0 is also present there.
  • the treatment system according to the invention does not require its own pressure generator, but can use the vacuum generator of the plant, from which the medium to be washed comes.
  • An efficient operation of the treatment system is achieved when a pressure difference is at least 700 mbar.
  • the temperature of the washing liquid is in the range of -15 ° C to 60 ° C and is adjusted to the washing liquid used.
  • the pressure p- in the centrifuge unit preferably corresponds to an atmospheric ambient pressure of the treatment system. Thus, there is no need to make provision for maintaining a pressure different from the ambient pressure in the centrifuge unit.
  • the centrifuge unit comprises at least one, but preferably two or more, centrifuges which are fed by the first line section coming from the wash tank.
  • the design of the centrifuges is z. B. matched to the type of washing liquid.
  • the centrifuge unit may comprise a collecting container for collecting treated washing liquid.
  • the collecting container may be connected to the second line section, wherein in the collecting container the pressure p-, the centrifuge unit is applied.
  • the second line section with the pressure p 2 or p 0 adjoins the collecting container, so that the washing liquid is sucked out of it.
  • the impurities and residues deposited in the centrifuges are discarded as usual from the centrifuges. Centrifuges with automatic cleaning can be used. By using two or more centrifuges, a continuous operation of the treatment system can be ensured.
  • the invention relates to a plastics processing plant with a system for the treatment of a washing liquid, as shown above.
  • the treatment system is a module of the plastics processing plant, as well as the processing unit for the plastic, and uses the generation of a negative pressure to suck the media to be washed for the generation of the operating pressure p 0 in the wash tank.
  • FIG. 1 shows a schematic representation of a system for the treatment of a washing liquid in combination with a plastics processing plant.
  • the system for the treatment of a washing liquid according to FIG. 1 is intended for the treatment of a washing liquid with which a gas-vapor mixture has been washed out of a processing unit 1 of a plastics processing plant.
  • the gas-vapor mixture accumulates as contaminated exhaust gas in the processing of plastics in the processing unit 1 and is introduced via a discharge from the processing unit 1 in a washing tank 2 of the treatment system.
  • a passage container 3 With the wash tank 2, a passage container 3 is connected, the lower region 4 is filled with a packed bed and disposed within the wash tank 2.
  • the passage container 3 is permeable in the lower region 4 for the gas-vapor mixture, for example, this area is perforated.
  • the upper region 5 has an outlet 6, possibly with a shut-off valve and a demister, or filter 8, on.
  • a vacuum generator 7 closes.
  • the washing tank 2 and the transit container 3 can be considered as scrubbers for the gas-vapor mixture.
  • the negative pressure generator 7 generates an operating pressure p 0 to suck the gas-vapor mixture from the processing unit 1 through the washing tank 2 and the passage tank 3.
  • the gas-vapor mixture flows through the washing liquid in the wash tank 2 and the GearSchissonmischung in the lower region 4 of the passage container 3, wherein an intense energy exchange with the washing liquid takes place.
  • the gas-vapor mixture leaves the passage container 3 in the direction of the vacuum generator through the outlet 6.
  • a line circuit is connected, comprising a first line section 9 of the wash tank 2 to a centrifuge unit 1 1 and a second line section 10 of the centrifuge unit 1 1 back to the wash tank 2.
  • the second line section 10 opens into the upper region 5 of the passage container 3.
  • a stopcock 12 and a pump 13 is arranged in the first line section 9.
  • the centrifuge unit 1 1 has two centrifuges 14 and 14 ', which are each fed by a supply line with a valve 15 and 15' through the first line section 9 with washing liquid. By means of the valves 15 and 15 ', the centrifuges 14 and 14' can be filled simultaneously or successively with washing liquid. In the flow direction behind the centrifuges 14 and 14 ', the centrifuge unit 1 1 has a collecting container 16, in which the washing liquid prepared in the centrifuges 14 and 14' is collected. From the collecting container 16, the second line section 10 of the line circuit goes off.
  • an operating pressure p 0 is generated by the suction of the gas-vapor mixture from the processing unit 1 by the vacuum generator 7 in the wash tank 2, which is below the pressure applied in the region of the processing unit 1.
  • the operating pressure p 0 is below the ambient atmospheric pressure and thus forms a vacuum, which by definition is to be understood as vacuum any pressure below the ambient pressure.
  • the operating pressure p 0 is at an absolute pressure between 1 .0 and 100 mbar.
  • the operating pressure p 0 in the wash tank is thus given by a suction pressure with which a gas-vapor mixture to be washed or another medium is sucked through the wash tank.
  • the washing liquid in the wash tank 2 For the treatment of the washing liquid in the wash tank 2, this is sucked through the first line section 9 by means of the pump and to a pressure p-, brought, which is higher than the operating pressure p 0 , preferably to the ambient pressure. With this pressure p-, the washing liquid is introduced into the centrifuge unit 1 1, which also has the pressure p-. In the centrifuge unit 1 1, the washing liquid is introduced into one or both of the centrifuges 14 and 14 '. In centrifuges 14 and 14 ', impurities are from the washing liquid in a conventional manner. The treated washing liquid flows freely into the collecting container 16.
  • the centrifuge unit In the second line section 10 is a pressure p 2 , which is smaller than the pressure p-, the centrifuge unit, preferably, the pressure p 2 corresponds to the operating pressure p 0 in the wash tank 2, or in the passage tank 3.
  • the pressure p 2 corresponds to the operating pressure p 0 in the wash tank 2, or in the passage tank 3.
  • a medium to be washed such as the gas-vapor mixture
  • the vacuum generator 7 sucks the medium to be washed from the processing unit by a discharge at an operating pressure p 0 .
  • the washing tank 2 and thus the system for the treatment of the washing liquid is provided between the processing unit 1 and the vacuum generator 7.
  • the pressure generation of the vacuum generator can be used for the treatment system and at the same time the vacuum generator can be operated fail-safe.
  • Processing unit 9 first line section

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

L'invention concerne un système et un procédé de préparation d'un liquide de lavage à partir d'un dispositif de lavage d'une installation de traitement de matières plastiques. Le liquide de lavage est transféré d'un réservoir de lavage (2) à une unité centrifugeuse (11) par le biais d'une première section de conduit (9) allant du réservoir de lavage (2) à l'unité centrifugeuse (11), une pression de fonctionnement p0 régnant dans le réservoir de lavage (2). Lors du transfert, la pression du liquide de lavage est montée à une pression p1 qui règne dans l'unité centrifugeuse (11) et qui est supérieure à la pression de fonctionnement p0. Des impuretés sont séparées du liquide de lavage au moyen de l'unité centrifugeuse (11) et le liquide de lavage est renvoyé de l'unité centrifugeuse (11) au réservoir de lavage (2) par le biais d'une seconde section de conduit (10).
PCT/EP2014/061638 2014-06-04 2014-06-04 Système et procédé de préparation d'un liquide de lavage Ceased WO2015185136A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/061638 WO2015185136A1 (fr) 2014-06-04 2014-06-04 Système et procédé de préparation d'un liquide de lavage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/061638 WO2015185136A1 (fr) 2014-06-04 2014-06-04 Système et procédé de préparation d'un liquide de lavage

Publications (1)

Publication Number Publication Date
WO2015185136A1 true WO2015185136A1 (fr) 2015-12-10

Family

ID=50896300

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/061638 Ceased WO2015185136A1 (fr) 2014-06-04 2014-06-04 Système et procédé de préparation d'un liquide de lavage

Country Status (1)

Country Link
WO (1) WO2015185136A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107754595A (zh) * 2016-08-16 2018-03-06 北京大运伟业防水工程有限公司 防水卷材专用环保净化处理设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492758A2 (fr) * 1990-12-25 1992-07-01 Mitsubishi Jukogyo Kabushiki Kaisha Dispositif de traitement d'une solution absorbante d'appareil de désulfuration de gaz d'échappement
DE19726210A1 (de) * 1997-06-20 1998-12-24 Ruhrgas Ag Verfahren und Anordnung zum Trocknen eines Gases
US20090162269A1 (en) * 2006-07-13 2009-06-25 Alstom Technology Ltd Reduced liquid discharge in wet flue gas desulfurization
EP2364760A1 (fr) 2010-02-25 2011-09-14 Alfa Laval Corporate AB Équipement de nettoyage pour liquid de lavage de gaz
DE102011082769A1 (de) * 2011-09-15 2013-03-21 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Verfahren und Vorrichtung zum Entgasen einer PET - Kunststoffschmelze in einer Extrusionsanlage
WO2013049896A1 (fr) * 2011-10-07 2013-04-11 Hunwick Richard J Procédé et système de capture de dioxyde de carbone à partir d'un courant gazeux

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492758A2 (fr) * 1990-12-25 1992-07-01 Mitsubishi Jukogyo Kabushiki Kaisha Dispositif de traitement d'une solution absorbante d'appareil de désulfuration de gaz d'échappement
DE19726210A1 (de) * 1997-06-20 1998-12-24 Ruhrgas Ag Verfahren und Anordnung zum Trocknen eines Gases
US20090162269A1 (en) * 2006-07-13 2009-06-25 Alstom Technology Ltd Reduced liquid discharge in wet flue gas desulfurization
EP2364760A1 (fr) 2010-02-25 2011-09-14 Alfa Laval Corporate AB Équipement de nettoyage pour liquid de lavage de gaz
DE102011082769A1 (de) * 2011-09-15 2013-03-21 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Verfahren und Vorrichtung zum Entgasen einer PET - Kunststoffschmelze in einer Extrusionsanlage
WO2013049896A1 (fr) * 2011-10-07 2013-04-11 Hunwick Richard J Procédé et système de capture de dioxyde de carbone à partir d'un courant gazeux

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107754595A (zh) * 2016-08-16 2018-03-06 北京大运伟业防水工程有限公司 防水卷材专用环保净化处理设备

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