WO2020021576A1 - Impulseur pour agitateur à induction de gaz - Google Patents

Impulseur pour agitateur à induction de gaz Download PDF

Info

Publication number
WO2020021576A1
WO2020021576A1 PCT/IN2019/050552 IN2019050552W WO2020021576A1 WO 2020021576 A1 WO2020021576 A1 WO 2020021576A1 IN 2019050552 W IN2019050552 W IN 2019050552W WO 2020021576 A1 WO2020021576 A1 WO 2020021576A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
impeller
gas induction
slots
hub
Prior art date
Application number
PCT/IN2019/050552
Other languages
English (en)
Inventor
Ashok Chandresekharan PILLAI
Hitesh Harshadbhai PATEL
Original Assignee
Gmm Pfaudler Limited
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 Gmm Pfaudler Limited filed Critical Gmm Pfaudler Limited
Publication of WO2020021576A1 publication Critical patent/WO2020021576A1/fr

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
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0053—Details of the reactor
    • B01J19/0066—Stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
    • B01F23/23311—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements through a hollow stirrer axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
    • B01F23/23314—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements through a hollow stirrer element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2336—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer
    • B01F23/23365—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer the gas being introduced at the radial periphery of the stirrer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/191—Stirrers with two or more mixing elements mounted in sequence on the same axis with similar elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/21—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts
    • B01F27/2122—Hollow shafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms 
    • 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
    • B01J10/00—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor

Definitions

  • the present invention relates to a Gas Induction Reactor / Agitator, and more particularly to a novel impeller to be used in the Gas Induction Reactor.
  • the Gas Induction Agitators are commonly used in process industry for inducing gas into the liquid for reactions.
  • the agitator has a motor at the top nozzle, an impeller (or a set of impellers) joined to the shaft which effects a rotational motion.
  • the gas is pumped into the vapour space above the liquid level or sparged through dip tubes or spargers in the reaction mass.
  • the shaft is hollow and slots are made on the shaft in the vapour space.
  • the gas induction impeller is also hollow and is connected to hollow shaft. The rotational motion of the agitator induces the flow of gas from the vapour space into the bulk liquid. The rate of gas induced is dependent on various parameters including impeller geometry, its location with respect to liquid height, speed of rotation etc.
  • US6250797 discloses an axial flow mixing impeller system for efficient mass transfer by control of size of the bubbles of the fluid which is being dispersed, especially gases and liquids with viscosities greater than the liquid into which dispersion occurs. This is obtained by creating passageways through the impeller blades for flow between the suction and pressure sides of the blades which disrupts the flow over the suction sides of the blades thereby reducing the tendency for bubbles to grow or coalesce into large bubbles which instead of being dispersed, rise to the surface without effective mass transfer to the liquid which is pumped by the impeller.
  • the blades of the impeller may be slotted inwardly from the tips thereof to provide the passageways or may be formed from segments, gaps between which provide the flow passageways.
  • the segmented blades have the advantage of enabling systems of large diameter impellers, of size approaching the diameter of the tanks or in closed tanks where access is by way of a manway smaller than the impeller blade dimensions, to be assembled within the tank, either upon initial installation or for replacement or retrofit. If the system is not used for gas or liquid dispersion, the segments may be in edge-to-edge abutment. Gas-to-liquid dispersion may also be improved by sparging below the impeller at the bottom of the tank and between the impellers in the tank, as with sparge rings of diameter less than the diameter of the impellers enabling gas supply at different pressures commensurate with the depth of the sparge rings, sufficient to overcome the head at the depth of the sparge ring.
  • the present invention discloses an impeller having novel geometry.
  • the impeller comprises of a hub; an Inner cone; a top profile; a bottom profile and plurality of blades.
  • the inner cone is provided with 45 degree downward pitch angle to obtain uniform gas distribution and certain flow pattern.
  • the hub is provided with plurality of openings, whereas the inner cone is provided with the plurality of slots. The openings and slots are arranged in line to produce the optimized efficiency.
  • the said gas induction impeller is made up of any steel alloy.
  • the impeller is glass lined which is suitable process fluid.
  • the impeller is designed with an advantageous geometrical shape.
  • the angle of impeller blade with respect to the axis determines the pumping efficiency of the said impeller.
  • FIG 1 illustrates a Gas Induction Reactor (1) in which an impeller of the present invention is to be employed.
  • Figure 2 illustrates the bearing housing assembly (2)
  • FIG. 3 illustrates the drive shaft assembly
  • Figure 4 illustrates the extension shaft assembly
  • Figure 5 illustrates the details of gas induction impeller (5) of the present invention
  • Figure 6 illustrates the comparative data of various impeller as compared with the impellers known in the art.
  • FIG. 1 illustrates a Gas Induction Reactor in which gas induction impeller (5) of the present invention is deployed.
  • the Gas Induction Reactor comprises of a vessel body (1), an electric motor (M); a gear reducer assembly (G), a bearing housing assembly (2); a pedestal (6), a drive shaft assembly (3), an extension shaft assembly (4), a gas induction impeller (5), and a sealing component (7).
  • the sealing component may be selected from a stuffing box, a mechanical seal or a magnetic seal. In a preferred embodiment, the stuffing box is chosen as a sealing component.
  • the Electric motor (M) is directly coupled to the gear reducer assembly (G).
  • a gear reducer assembly (G) is further coupled to the Bearing housing assembly (2), whereas the Bearing housing assembly (2) is coupled to the pedestal (6) which is mounted on the Gas Induction reactor (1).
  • Figure 2 illustrates the Bearing housing assembly (2) which comprises of a bearing housing body (2.1); plurality of Bearings (2.2) and a sealing cover (2.3).
  • the major function of the bearing housing assembly (2) is to accommodate Static and Dynamic force transmitted on the Drive shaft (3) due to forces acting on the extension shaft (4).
  • Figure 3 illustrates a drive shaft assembly (3) comprising a drive shaft (3.1) and a locking means (3.2).
  • the locking means (3.2) is preferably a locknut.
  • Figure 4 illustrates the extension shaft which comprises of a solid bar (4.1); a hollow pipe (4.2); a taper coupling (4.3); a locking plate (4.4).
  • the Taper coupling (4.3) is joined to the drive shaft (3.1).
  • the Solid shaft (4.1) and the Hollow pipe (4.2) are welded to the taper coupling (4.3) by means of a locking plate (4.4).
  • the Holes (4.5) or the slots (4.5a) are fabricated on the hollow pipe (4.2).
  • the factors, such as size of the holes (4.5) / slots (4.5. a) and total number of holes (4.5) / slots (4.5. a), are derived based on empirical data and engineering calculations. The function of these holes (4.5) / slots (4.5.
  • a) are to provide a path for air / gas; which is sucked by the gas induction impeller (5).
  • the said holes (4.5) / slots (4.5. a) are either in the perpendicular direction to the central axis of the extension shaft (4) or tangential to the central axis of the extension shaft (4).
  • the extension shaft (4) comprises plurality of slots (4.6), positioned according to the position of the Gas impeller (5).
  • the significance of the said slots (4.6) is to provide a path to transfer the sucked air / gas to the Impeller with the help of the holes (4.5) / slots (4.5. a), positioned at the top of the impeller.
  • the said slots (4.6) are positioned in the tangential direction to the central axis of the extension shaft
  • FIG. 5 illustrates the impeller (5) which is the subject of the present invention.
  • the impeller (5) is immersed in liquid.
  • Said impeller essentially comprises of a hub (5.1); an inner cone (5.2); a top profile (5.3); a bottom profile (5.4) and plurality of blades (5.5).
  • the blades (5.5) are hollow.
  • the hub (5.1) is coupled to the hollow pipe (4.2), wherein the hollow pipe (4.2), as described earlier, is provided with plurality of slots (4.6) at the holes (4.5) at the top portion for entry of a gas.
  • the hub (5.1) is provided with plurality of openings (5.1.
  • the inner cone (5.2) comprises of plurality of slots (5.2. a) with respect to the hub slots (5.1.a).
  • the inner cone slots (5.2. a) are tangential to the central axis of the extension shaft (4.2).
  • the openings (5.1. a), which are provided at hub (5.1), and slots (5.2. a), which are provided at inner cone (5.2), are arranged in line to get the optimized result based on trials and analysis.
  • the impeller (5) is prepared with any grade of alloy steel.
  • the impeller (5) is made of Glass Lined steel material.
  • Plurality slots (5.1. a) are created on the hub (5.1) by determining the centre line of hub (5.1). Size of slots (5.1.a) is determined with the help of empirical database and certain engineering calculations.
  • the Top profile (5.3) and the Bottom profile (5.4) is designed based on the process engineering fundamentals and analysis carried out. The role of Top profile (5.3) and Bottom profile (5.4) is to assure required flow pattern generation for mixing, uniform gas distribution and more gas hold up / prevent gas leakage in the process. To achieve these requirements, large engineering calculations are carried out.
  • the Bottom Profile (5.4) is welded with the hub (5.1) by determining the width of impeller and equal distance provided to both end.
  • the inner cone (5.2) is established on the bottom profile (5.4) and is provided with plurality of slots (5.2.
  • the slots (5.1. a) made on hub (5.1) and the slots (5.2. a) made on inner cone (5.2) are parallel to each other.
  • the inner cone (5.2) is provided with 45 degree downward pitch angle to obtain uniform gas distribution and certain flow pattern.
  • the impeller blades (5.5) are attached with the inner cone (5.2).
  • the impeller blades (5.5) are also arranged at 45 degree downward pitch angle.
  • An opening (5.6) is provided at the end of impeller blades (5.5). The size of opening (5.6) is determined with the empirical database and engineering calculations.
  • the Top profile (5.3) is welded with the hub (5.1) and the impeller blades (5.5).
  • the impeller (5) having the geometry as explained before, is immersed in the liquid.
  • the rotation of the impeller (5) results into the pressure differential Pd.
  • the said differential pressure is enough to overcome the overall pressure P, such that the gas flow is continued from the top portion (4.5) of the hollow pipe (4.2) to the impeller (5).
  • Figure 5 illustrates the comparative data of various impeller as compared with the impellers known in the art represents two data types which are being compared with Novel Impeller of the invention:

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

La présente invention concerne un impulseur à induction de gaz comprenant une conduite creuse dotée d'une pluralité de trous pour aspirer de l'air ou du gaz ; un moyeu couplé à la partie inférieure de la conduite creuse par l'intermédiaire d'une fente ; un cône intérieur muni d'une pluralité de fentes intégrées avec le moyeu ; une pluralité de pales constituées d'un profil supérieur et d'un profil inférieur comportant des ouvertures vers le bord de ladite pale, ladite pluralité de pales étant intégrée au cône intérieur, l'impulseur à induction de gaz fournissant une retenue de gaz plus élevée à une puissance inférieure par volume unitaire et une vitesse de gaz superficielle supérieure, ce qui permet d'obtenir un taux de transfert de masse plus élevé.
PCT/IN2019/050552 2018-07-27 2019-07-27 Impulseur pour agitateur à induction de gaz WO2020021576A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN201821028388 2018-07-27
IN201821028388 2018-07-27

Publications (1)

Publication Number Publication Date
WO2020021576A1 true WO2020021576A1 (fr) 2020-01-30

Family

ID=69181422

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2019/050552 WO2020021576A1 (fr) 2018-07-27 2019-07-27 Impulseur pour agitateur à induction de gaz

Country Status (1)

Country Link
WO (1) WO2020021576A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113617325A (zh) * 2021-09-01 2021-11-09 南京工业大学 一种搅拌式气液反应器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2554664A1 (de) * 1975-12-05 1977-06-16 Stelzer Fa Erwin Ruehrwerk
GB1521785A (en) * 1976-05-05 1978-08-16 United States Filter Corp Apparatus for dispersing a gas in a liquid
US6368381B1 (en) * 1998-03-11 2002-04-09 Placer Dome Technical Services, Ltd. Autoclave using agitator and sparge tube to provide high oxygen transfer rate to metal-containing solutions

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2554664A1 (de) * 1975-12-05 1977-06-16 Stelzer Fa Erwin Ruehrwerk
GB1521785A (en) * 1976-05-05 1978-08-16 United States Filter Corp Apparatus for dispersing a gas in a liquid
US6368381B1 (en) * 1998-03-11 2002-04-09 Placer Dome Technical Services, Ltd. Autoclave using agitator and sparge tube to provide high oxygen transfer rate to metal-containing solutions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113617325A (zh) * 2021-09-01 2021-11-09 南京工业大学 一种搅拌式气液反应器

Similar Documents

Publication Publication Date Title
JP2010529003A (ja) クロロヒドリンの製造方法
JPH06182171A (ja) 変動する液体操作水準条件の下での気液混合の向上
JP6931270B2 (ja) マイクロナノバブル発生装置を備えた気液反応装置及びこの気液反応装置を用いた気液反応方法
US20200332389A1 (en) Reactor for gas-liquid mass transfer
EP0441505A1 (fr) Agitateur
CN100577277C (zh) 自吸式内循环超重场气液反应器
US6627174B1 (en) Axial conveyor and loop reactor containing said axial conveyor
JP2013121590A (ja) 混合装置
WO2020021576A1 (fr) Impulseur pour agitateur à induction de gaz
WO2015080667A1 (fr) Appareil de mélange
CA2366795C (fr) Systeme de melange en cuve et roue a aubes radiales connexe
EA031657B1 (ru) Реактор для смешивания жидкости, газа и твердого материала
CN106423022B (zh) 一种高效液体反应罐
US10864486B2 (en) Rotary gas bubble ejector
JP7341389B2 (ja) 反応装置及び反応装置を用いた化学処理方法
US6068132A (en) Perfected reactor for liquids purification
EP1243313A2 (fr) Appareil et procédé pour mélanger un gaz avec un liquide ou un liquide avec un liquide
CN114126754A (zh) 反应混合器
JP2020054976A (ja) 反応装置
JP7090287B2 (ja) 反応装置
Kresta et al. Flow patterns and mixing
CN218130133U (zh) 天然气泡沫排水采气系统用消泡罐及消泡模块
CN217313144U (zh) 一种气爆式液体浓配罐
US5324110A (en) Agitating device with baffle
JP7105445B2 (ja) 反応装置

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: 19842060

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: 19842060

Country of ref document: EP

Kind code of ref document: A1