[go: up one dir, main page]

WO2018193031A1 - Procédé et appareil de gestion de boues liquides dans des systèmes d'écoulement - Google Patents

Procédé et appareil de gestion de boues liquides dans des systèmes d'écoulement Download PDF

Info

Publication number
WO2018193031A1
WO2018193031A1 PCT/EP2018/060018 EP2018060018W WO2018193031A1 WO 2018193031 A1 WO2018193031 A1 WO 2018193031A1 EP 2018060018 W EP2018060018 W EP 2018060018W WO 2018193031 A1 WO2018193031 A1 WO 2018193031A1
Authority
WO
WIPO (PCT)
Prior art keywords
aperture
less
slurry
process equipment
feed channel
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/EP2018/060018
Other languages
English (en)
Inventor
Robert Ashe
Gary ECCLESON
Christopher GAUNT
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.)
Ashe Morris Ltd
Original Assignee
Ashe Morris 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
Priority claimed from GBGB1706164.9A external-priority patent/GB201706164D0/en
Priority claimed from GB1708588.7A external-priority patent/GB2565035B/en
Application filed by Ashe Morris Ltd filed Critical Ashe Morris Ltd
Publication of WO2018193031A1 publication Critical patent/WO2018193031A1/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
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J4/00—Feed or outlet devices; Feed or outlet control devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/20—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/01—Processes of polymerisation characterised by special features of the polymerisation apparatus used
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00743—Feeding or discharging of solids
    • B01J2208/00769—Details of feeding or discharging
    • B01J2208/00787—Bringing the solid in the form of a slurry before feeding it to the reactor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00274—Sequential or parallel reactions; Apparatus and devices for combinatorial chemistry or for making arrays; Chemical library technology
    • B01J2219/00277—Apparatus
    • B01J2219/00457—Dispensing or evacuation of the solid phase support
    • B01J2219/00459—Beads
    • B01J2219/00466—Beads in a slurry

Definitions

  • the present invention relates to the controlled delivery of slurries into process equipment such as reactors through which a process material flows while undergoing a chemical or physical change.
  • the invention is concerned with both an apparatus for the delivery of a slurry and a process in which a slurry can be delivered into a reactor under conditions whereby the slurry is delivered in a controlled manner over a period of time at a predetermined rate and a predetermined concentration.
  • the invention is particularly useful in the delivery of slurries into reactors in which a process material flows continuously in order to provide a desired ratio of slurry and/or the solid contained therein to process material over an extended period of time.
  • One particular use of the invention is in the delivery of catalyst slurries into reactors such as polymerisation or hydrogenation reactors where the process material is a polymerisable material or a mixture of a material to be hydrogenated and hydrogen.
  • the present invention provides a method and apparatus for continuous controlled delivery of slurries into process equipment.
  • Process equipment refers to systems in which a physical or chemical change of a process material occurs usually requiring a particular residence time of the process material within the process equipment.
  • the process material may be a liquid containing particulate solids and may also include a gas and the process performed in the process equipment can include mixing, separation, crystallisation or chemical reaction.
  • the process equipment may be a continuous: chemical reactor, bio reactor, separator, mixer, crystalliser or one that performs other unit operations and the reaction is one where a defined residence time within the process equipment is required.
  • the term slurry refers to free flowing liquids containing particulate solids. Gas may be present as a third component.
  • Controlled delivery means that volumetric flow rate and also the ratio of solids to liquids delivered into the process equipment are maintained within specified limits.
  • the volumetric flow rate is determined by the volumetric capacity of the process equipment divided by residence time.
  • the residence time requirements in the equipment differentiate this system from slurry transfer systems where residence time is not defined and slurry can be transferred at high volumetric flow rates in large diameter channels.
  • the system provided by this invention is one which is sealed between the slurry feed line and the discharge line from the process equipment and although it can operate below ambient pressure it typically operates above ambient temperature.
  • the slurry delivery system of this invention can be used for solids which are neutrally buoyant but is primarily used with slurries containing solids which float or sink. Although not limited to such an embodiment we will describe the invention in relation to solids which sink and the direction of flow of the solids in unmixed zones is down. The same principles can be used for solids which float but in such cases the direction of flow in unmixed zones is up.
  • the term a line as used herein refers to a pipe or channel used to contain the flowing slurry.
  • a slurry is held in a feed tank and passes into the process equipment under controlled transfer.
  • problems occur if solids settle on surfaces or bridge across the face of lines or equipment.
  • Settling can be prevented with active or passive mixing.
  • Bridging can be prevented by using lines with diameters which are greater than 10X the diameter of the solids in the slurry and more preferably 20X greater.
  • the present invention therefore provides a device for the delivery of a slurry from a slurry line into process equipment comprising a feed channel between the slurry line and the process equipment wherein the aperture from the slurry line into the feed channel has a maximum dimension of 10 mm and the length of the feed channel is not greater than the maximum dimension of the aperture.
  • the ratio of solids to liquid entering the feed channel must also be controlled to the level required in the process equipment and is typically controlled by the ratio in a slurry feed tank.
  • the device of the invention is preferably provided in a slurry line which is part of a continuous slurry recycle system comprising a stirred slurry tank and a recycle line from which the slurry is delivered to the process equipment via the device of the invention. In this way the concentration of the slurry can be maintained by monitoring and if necessary adjusting the concentration of the slurry in the slurry tank and the amount of slurry delivered into the process equipment can be controlled by the flow rate of the slurry diverted from the recycle system.
  • the device according to the invention can be replaceable to enable the system to operate effectively with slurries of different concentrations and/or containing particles of different sizes and/or travelling at different speeds within the supply line.
  • the aperture of the device of the present invention is circular and the maximum dimension is the diameter of the circle. It is also preferred that the surface of the aperture is smooth and highly polished to remove any irregularities that might provide locations for deposition of particles from the slurry.
  • Figure 1 shows a slurry delivery system for delivery of slurry to process equipment according to the invention.
  • Figure 2 shows a slurry delivery device of the invention.
  • Figure 3 is a section through the delivery device of Figure 2.
  • Figure 4 shows an alternate slurry delivery device provided with a gas bleed.
  • slurry is held in a feed tank (1 ) where it is stirred to maintain a uniform distribution of solids within the liquids.
  • the slurry flows through a recycle line (2) using a pump (3) and returns to the feed tank (1 ).
  • the internal diameter of the recycle line is large enough to prevent bridging and the slurry is pumped at a velocity sufficient to transport the slurry.
  • the slurry delivery device (4) diverts a fraction of the slurry from the recycle line (2) to the feed line (5) and into the process equipment (6) and is located above the reactor at minimum distance.
  • the feed line (5) is positioned at 30° or less from the vertical and is preferably vertical.
  • the process equipment (6) is horizontal in this example and can employ active or passive mixing to keep the solids suspended and moving with the process material. Other types of process equipment in different orientations may be used.
  • the discharge line from the process equipment is oriented at 30° or less from the vertical and is preferably vertical.
  • Slurry residue passes to a solids collection vessel (7) below the process equipment.
  • the solids collection vessel separates solids by filtration, gravity or other means.
  • Solids free liquid passes to the liquid discharge line (8) which may employ a flow control system as shown here (9) which includes a flow measuring element with a control valve. Other flow control methods may be used.
  • the discharge line (8) passes to a fluid tank (10) and passes at an elevation above the reactor to keep the system liquid filled. An anti-syphon device (not shown) may also be used.
  • Figure 1 shows a slurry delivery device (4) of the invention located in a recycle line which is the preferred arrangement.
  • the recycle line may be a point in the slurry storage tank adjacent to the slurry dosing device (4) and slurry is recycled within the tank by the stirrer.
  • the arrangement in figure 1 employs transfer lines and equipment with diameters large enough to prevent bridging. Solids are kept suspended by active or passive mixing where possible. In slow moving unmixed zones, the lines are oriented so that slurry flow is gravity assisted.
  • the slurry delivery element (4) is located in the slurry feed tank, flow into the feed line (5) can be promoted by operating the feed tank at elevated pressure or by using a pump on the solids free discharge line (8).
  • a recycle line as shown in figure 1 is preferred.
  • a pump located before the slurry delivery element (4) creates elevated pressure in the recycle line between the slurry delivery element and the return line to the feed tank (1 ). This causes fluid to pass into the feed line (5).
  • If required line restrictors or valves may be used in the recycle return line downstream of the slurry delivery element to increase the back pressure.
  • the liquid to solids ratio within the feed line (5) is the same as the feed tank (1 ) as controlled by the slurry delivery device (4). This may be located within the feed tank but locating it in a recycle line is preferred.
  • Figure 2 shows the slurry delivery device (4). This has a channel which forms part of the recycle line and the inlet (1 1 ) and outlet (12) connections for the recycle line are shown. A third channel forms part of the feed line with connection (13). Different connection orientations can be used. The preferred arrangement is as shown with a straight channel for the recycle line and the feed channel intersecting with this at between 45° and 135° but preferably at 90°.
  • An access port (14) is preferred which is used during fabrication and cleaning. The access port is also used for fitting removable feed apertures (15) where used. It is also used for fitting moveable elements which are used for closing or cleaning the feed aperture (15).
  • the slurry delivery device is preferably mounted so that the recycle channel is horizontal and that the body of the slurry delivery device can be rotated around the long axis of the recycle channel such that the orientation of the feed channel can be varied from bottom dead centre to top dead centre.
  • This angle may be varied to optimise control of the ratio of solids to liquids passing into the feed channel. It is preferred that the angle of feed channel is ⁇ 45° from horizontal.
  • FIG. 3 shows a section through the slurry delivery device (4).
  • the feed aperture (15) forms a connection between the recycle line and the feed channel. It is preferred that a transition zone (16) is located between the feed aperture and the feed line. This creates a progressive expansion from the feed aperture with flaring at an angle of 45° or greater.
  • the slurry delivery device (4) diverts fluid from the recycle line (2) to the feed line (5) with the same ratio of solids to liquid as is in the feed tank (1 ). The key requirements for this are described below.
  • the feed aperture (15) is circular with a diameter of less than 10mm and preferably less than 5 mm.
  • the length of the feed aperture is equal to or less than the diameter of the aperture and more preferably equal to or less than half the diameter.
  • the length of the feed aperture preferably does not exceed 5 mm.
  • the feed aperture has no pockets.
  • the feed aperture preferably has a horizontal surface of less than 3 mm and more preferably less than 1 mm.
  • the feed aperture is polished with no projections to trap particles. It is preferred that any sharp edges of the aperture are removed.
  • the diameter of the feed aperture is selected to be greater than 4X and more preferably greater than 8X the diameter of the particles in the slurry.
  • the cross sectional area of the aperture is less than 25% that of the feed (5) line and more preferably less than 18%. It may be connected above or at the midpoint or below the midpoint of the recycle channel. It is preferred that the diameter of the feed channel (15) may be constant although it is preferred that it is flared with the diameter increasing from the recycle side to the feed side at an angle of 45° or less.
  • the channel may be cut into the body of the slurry delivery device although a separate insertable element is preferred so that the orifice size can be changed within the same device.
  • the insertable element may also incorporate a transition zone. The insertable element is inserted via the access port (14)
  • the slurry delivery device (4) is a type of valve for controlled transfer of slurry. It is preferred that the aperture and the channel (15) have minimum horizontal surfaces and preferably zero horizontal surfaces in the operating position such that there is a constant fall between the recycle line (2) and the aperture on one side and a constant fall between the aperture and the feed line (5) on the other side.
  • the slurry delivery device (4) requires mechanical strength to operate at elevated pressures. These pressures can be 50 bar and more preferably 100 bar or more.
  • Within the device are intersecting channels with minimal distance between the perimeter of the recycle line and the centre of the feed line. For good mechanical strength it is therefore preferred that the recycle line and the feed channel within the dosing element are formed from two and more preferably a single piece of material.
  • the slurry delivery device (4) is used where the flow conditions in the unmixed zones is laminar.
  • the slurry delivery device may be used for flow rates of less than 100 l/hr and more preferably less than 50 l/hr and even more preferably less than 25 l/hr.
  • the slurry delivery device (4) is preferably made of materials that are compatible with the process material and of sufficient mechanical strength. Many different materials and combinations of materials can be used. It is preferred that the recycle line is well mixed and this may be achieved through high axial velocities with or without static mixing elements. It is preferred that the flow conditions in the recycle line are turbulent.
  • the slurry delivery device (4) has no moving parts, although an additional feature of a moving part can be fitted in the form of a pin which can be pushed forward from the feed line side to close the aperture or clear blockages. This pin can be manually operated or automated and is mounted via the access port (14).
  • Figure 4 shows a slurry delivery device with a gas bleed connection (17).
  • This gas bleed line (not shown) is connected to the gas bleed connection and this line is provided with a means to prevent fluid flowing up the gas bleed line. This can be done by elevating the gas bleed line so that the static head of liquid is too high to overcome or by a mechanism which only permits the passage of gas. Different methods can be used such valves in combination with level detector or floats that block the gas line when the liquid level is high.
  • the gas bleed connection is typically the highest point on the slurry delivery device. It is preferred that it is within 45° of the vertical.
  • the slurry delivery device can be used for feeding slurries into continuous reactors and is particularly useful for the provision of solid catalysts for continuous reactors.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)

Abstract

La présente invention concerne un dispositif pour l'écoulement de matériau d'une source de matériau dans un équipement de traitement comprenant une source de matériau et un canal d'alimentation qui sont reliés par une ouverture dans laquelle le canal d'alimentation est orienté à 45° ou moins par rapport à la verticale et l'ouverture est dans les 45° ou moins par rapport à l'horizontale et ladite ouverture a une largeur maximale pas supérieure à 10 mm et une longueur pas supérieure à la dimension de largeur. L'invention concerne en outre l'utilisation du dispositif pour manipuler des boues liquides, en particulier pour un écoulement descendant.
PCT/EP2018/060018 2017-04-19 2018-04-19 Procédé et appareil de gestion de boues liquides dans des systèmes d'écoulement Ceased WO2018193031A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB1706164.9 2017-04-19
GBGB1706164.9A GB201706164D0 (en) 2017-04-19 2017-04-19 Method and apparatus for handling slurries in flow systems
GB1708588.7 2017-05-30
GB1708588.7A GB2565035B (en) 2017-05-30 2017-05-30 Method and apparatus for handling solids in flow systems

Publications (1)

Publication Number Publication Date
WO2018193031A1 true WO2018193031A1 (fr) 2018-10-25

Family

ID=62196508

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/060018 Ceased WO2018193031A1 (fr) 2017-04-19 2018-04-19 Procédé et appareil de gestion de boues liquides dans des systèmes d'écoulement

Country Status (1)

Country Link
WO (1) WO2018193031A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2565035A (en) * 2017-05-30 2019-02-06 Ashe Morris Ltd Method and apparatus for handling solids in flow systems

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0428056A1 (fr) * 1989-11-14 1991-05-22 Neste Oy Procédé et dispositif pour introduire des catalyseurs dilués en forme de boue dans un réacteur de polymérisation
WO2005077522A1 (fr) * 2004-02-13 2005-08-25 Total Petrochemicals Research Feluy Procede et appareil de preparation et d'acheminement d'une bouillie catalytique dans un reacteur de polymerisation
CN1927440A (zh) * 2005-09-09 2007-03-14 中国石油化工股份有限公司 浆液或液体催化剂加料装置
US20070140934A1 (en) * 2003-12-05 2007-06-21 Idemitsu Kosan Co., Ltd Catalyst supply device
CN205275504U (zh) * 2015-12-16 2016-06-01 神华集团有限责任公司 一种聚丙烯催化剂的进料系统

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0428056A1 (fr) * 1989-11-14 1991-05-22 Neste Oy Procédé et dispositif pour introduire des catalyseurs dilués en forme de boue dans un réacteur de polymérisation
US20070140934A1 (en) * 2003-12-05 2007-06-21 Idemitsu Kosan Co., Ltd Catalyst supply device
WO2005077522A1 (fr) * 2004-02-13 2005-08-25 Total Petrochemicals Research Feluy Procede et appareil de preparation et d'acheminement d'une bouillie catalytique dans un reacteur de polymerisation
CN1927440A (zh) * 2005-09-09 2007-03-14 中国石油化工股份有限公司 浆液或液体催化剂加料装置
CN205275504U (zh) * 2015-12-16 2016-06-01 神华集团有限责任公司 一种聚丙烯催化剂的进料系统

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2565035A (en) * 2017-05-30 2019-02-06 Ashe Morris Ltd Method and apparatus for handling solids in flow systems
GB2565035B (en) * 2017-05-30 2022-10-05 Ashe Morris Ltd Method and apparatus for handling solids in flow systems

Similar Documents

Publication Publication Date Title
US5620606A (en) Method and apparatus for reacting oxidizable matter with particles
JP2004504930A (ja) プロセス材料を混合する方法及び装置
US6966985B2 (en) Self-diluting feedwell including a vertical education mechanism
MX2007003690A (es) Mezclador de inyeccion de fluido multiple.
CA2634025C (fr) Decanteur dynamique
FI119279B (fi) Sakeutusmenetelmä ja sakeutuslaitteisto
CA2195851C (fr) Systeme et procede de reduction de pression
KR20150036522A (ko) 연속처리장치
WO2018193031A1 (fr) Procédé et appareil de gestion de boues liquides dans des systèmes d'écoulement
US20090304465A1 (en) L-Valve Construction for Controlling Solids Flow in a Liquid Medium Using Standard Pipe Fittings
US5755974A (en) Method and apparatus for reacting oxidizable matter with a salt
RU2523482C2 (ru) Устройство для равномерного разделения потоков текучей среды в химических аппаратах на два или несколько отдельных потоков
US20180236381A1 (en) Ifs and grit box for water clarification systems
GB2565035A (en) Method and apparatus for handling solids in flow systems
KR20050100394A (ko) 자체 혼합 탱크, 유체를 일정한 운동 상태로 유지하는시스템 및 혼합 시스템
US20100102005A1 (en) Dewatering facility
US11976770B2 (en) Solid removal in glycol reclamation
KR20110072932A (ko) 연속식 혼합장치를 이용한 재생약액 공급 장치
CN201128742Y (zh) 静态快速沉降器
US20200306798A1 (en) Separator Assemblies and Methods
CN111089286A (zh) 防除垢循环流化床换热器及防除垢循环方法
US5589064A (en) Apparatus for liquid solid separation of liquid effluents or wastewater
RU2794080C1 (ru) Способ для перемешивания среды, транспортируемой по трубопроводу и устройство для его осуществления
US5470149A (en) Air sparger for agitating solid-liquid suspensions
RU133898U1 (ru) Устройство ввода химического реагента

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18725406

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18725406

Country of ref document: EP

Kind code of ref document: A1