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WO2014200353A1 - Pre-treatment apparatus for a wet scrubber - Google Patents

Pre-treatment apparatus for a wet scrubber Download PDF

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Publication number
WO2014200353A1
WO2014200353A1 PCT/NL2014/050394 NL2014050394W WO2014200353A1 WO 2014200353 A1 WO2014200353 A1 WO 2014200353A1 NL 2014050394 W NL2014050394 W NL 2014050394W WO 2014200353 A1 WO2014200353 A1 WO 2014200353A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
treatment device
parts
nozzle
inlet
Prior art date
Application number
PCT/NL2014/050394
Other languages
French (fr)
Inventor
Wiegert Stefanus PANJER
Original Assignee
Ecoscrub Solutions B.V.
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 Ecoscrub Solutions B.V. filed Critical Ecoscrub Solutions B.V.
Priority to EP14759068.1A priority Critical patent/EP3007800A1/en
Publication of WO2014200353A1 publication Critical patent/WO2014200353A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06—Spray cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D51/00—Auxiliary pretreatment of gases or vapours to be cleaned
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/79—Injecting reactants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/3073—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a deflector acting as a valve in co-operation with the outlet orifice

Definitions

  • the invention relates to a pre-treatment device for use in a wet scrubber for the purification of contaminated vapors, comprising a tube provided with an inlet for contaminated vapors and an outlet for pre-purified vapor, as well as seen in a cross- section in the middle of the tube near the inlet a nozzle for spraying a water-air mixture in the vapor stream.
  • Such a pre-treatment device is generally known.
  • a disadvantage of the known pre-treatment device is that the nozzle regular becomes clogged by dirt particles present in the spray mixture or loose lime particles.
  • An object of the invention is to provide a pre-treatment device of the type described in the preamble in which the polluted water-air mixture is discharged more fully than in the known pre-treatment apparatus.
  • the pre-treatment apparatus according to the invention is characterized in that the tube is arranged in an inclined position in which the inlet is at a higher level than the outlet, and that the tube an provided with a discharge opening for contaminated water, which opening is located close to the outlet in a lower side of the tube wall.
  • An embodiment of the pre-treatment device according to the invention is characterized in that the tube is arranged between 5 and 30 degrees relative to the horizontal plane. With this arrangement, the flow rates to the discharge opening are present in an optimum range. Further preferably, in the bottom of the tube wall a discharge channel is present that slopes down to the discharge opening steeper than the inner wall of the tube. By this a better drainage of polluted water is obtained.
  • a further embodiment of the pre-treatment device according to the invention is characterized in that the pre-treatment device further comprises at least one further duct which is arranged parallel to the said tube, wherein a main inlet splits into the inlets of the pipes. It has been found that splitting the stream of polluted inlet gases and distributing these over several tubes, in these tubes a more optimal ratio between the tube diameter, flow velocity of polluted gas and quantity and speed of injected water-air mixture can be achieved.
  • the nozzle comprises a nozzle head which comprises two parts between which a spray slit is formed, of which parts one first part has a shape of a spherical segment or partial sphere or a cone or truncated cone, and the other, second part has a conical shape congruent to the shape of the first part of which the dish surface is at a distance from the conical or spherical surface, wherein the second part is provided with one or more holes for the water-air mixture, and wherein the nozzle is provided with adjusting means for moving the parts toward one another and away from each other.
  • the second part is provided with a plurality holes which are evenly distributed over the dish surface.
  • the shapes of the parts are such that the spray slit decreases outwardly from the center.
  • the adjusting means comprise preferably a threaded rod and a nut present thereon, wherein the two parts are provided with a central through hole through which the threaded rod crosses, and the nut is present on one side of both parts and can move the first part to and from the second part.
  • Figure 1 is a scrubber system with a pre-treatment apparatus and a wet scrubber
  • Figure 2 shows the nozzle of the pre-treatment device in detail; and Figure 3 shows the nozzle in perspective.
  • a scrubber system 1 is equipped with a pre-treatment device 3 according to the invention.
  • This scrubber system has a wet scrubber 5 where contaminants are removed from vapor.
  • the polluted vapor is pre-cleaned before it enters the scrubber. This is done in the pre-treatment apparatus in which nozzles 7 are provided in which circulation fluid is nebulized with compressed air.
  • a part of the circulation fluid (approximately 20%) is entrained by the vapor to a scrubber column and will accumulate in a tank 9.
  • the remaining part (about 80%) is fed to a tank 11 through a return conduit.
  • pollution which condensates there may arise a floating layer of the pollution in the tank 11.
  • the circulation of the circulation fluid is maintained by a pump 13.
  • the tank 11 constitutes the water buffer for the circulation system. This water is cooled by a water cooler 15 to 1 degree Celsius in order to condense. As much as possible pollution is present in the vapor.
  • the pre-treatment device 3 has two tubes 17, which are arranged parallel to each other and are each provided with an inlet 19 for contaminated vapors and an outlet 21 for pre-purified vapor.
  • the two inlets are connected to a common main inlet.
  • the inlet is located near the nozzle 7 in the tube, which is present in the middle of the tube seen in cross-section. During operation this nozzle sprays a water-air mixture 23 in the vapor stream.
  • the diameter of the tubes is selected such that there is a proper ratio of the spray and the amount of vapor which is pressed through the tubes. This results in optimum contact between the vapor and the liquid circulation.
  • the tubes 17 are arranged in an inclined position whereby the inlet is at a higher level than the outlet.
  • Each tube is further provided with a discharge opening 25 for contaminated water, which is located close to the outlet in a lower side of the tube wall.
  • a discharge chute 27 is provided which slopes down towards the discharge opening.
  • the nozzle 7 is shown in detail.
  • the nozzle has a housing 29 which is formed by a pipe open at one end. This open end is closed off by a nozzle head 31 which has two parts between which a spray slit 33 is present.
  • a first one of these parts 31A has a shape of a spherical cap, and the other, second part 31B has a conical shape congruent thereto, of which conical shape the dish surface is present at a distance from the spherical surface.
  • the parts are formed such that the spray slit decreases outwardly from the center.
  • the second part is provided with a plurality of evenly over the dish surface distributed holes 35 for the air-water mixture.
  • the nozzle 7 is shown in perspective. Herein, the holes 35 in the dish surface are clearly visible.
  • the nozzle 7 is provided with adjusting means for moving the parts the towards each other and away from each other.
  • adjustment means are formed by a threaded rod 37 with a wing nut 39 thereon.
  • the threaded rod extends through a central through-hole 41 present in the two parts.
  • the wing nut is present on one side of the two parts and will move to or from the second part 3 IB upon rotation the first part 31A.
  • the distance between the parts preferably has to be regularly adjusted.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

A pre-treatment apparatus for the purification of polluted vapors has two tubes 17, which are each provided with an inlet for contaminated vapors and an outlet for the pre-purified vapo. Near the inlet, there is a nozzle 7 which during operation sprays a water-air mixture 23 in the vapor stream. The nozzle has a nozzle head 31 which has two parts between which a spray slit 33 is present. One of these parts 31A has a shape of a spherical cap and the other part 31B has a conical shape congruent thereto, of which the dish surface is at a distance from the spherical surface. The second part is provided with a plurality of evenly over the dish surface distributed holes 35 for the air-water mixture. The nozzle 7 is provided with adjusting means for moving the parts towards each other and away from each other. These adjustment means are formed by a threaded rod 37 with a wing nut 39 present thereon.

Description

Pre-treatment apparatus for a wet scrubber
DESCRIPTION:
Field of the invention
The invention relates to a pre-treatment device for use in a wet scrubber for the purification of contaminated vapors, comprising a tube provided with an inlet for contaminated vapors and an outlet for pre-purified vapor, as well as seen in a cross- section in the middle of the tube near the inlet a nozzle for spraying a water-air mixture in the vapor stream.
State of the art
Such a pre-treatment device is generally known. A disadvantage of the known pre-treatment device is that the nozzle regular becomes clogged by dirt particles present in the spray mixture or loose lime particles. Summary of the Invention
An object of the invention is to provide a pre-treatment device of the type described in the preamble in which the polluted water-air mixture is discharged more fully than in the known pre-treatment apparatus. For this purpose, the pre-treatment apparatus according to the invention is characterized in that the tube is arranged in an inclined position in which the inlet is at a higher level than the outlet, and that the tube an provided with a discharge opening for contaminated water, which opening is located close to the outlet in a lower side of the tube wall. As a result, the contaminated condensed water can be better and more fully drained.
An embodiment of the pre-treatment device according to the invention is characterized in that the tube is arranged between 5 and 30 degrees relative to the horizontal plane. With this arrangement, the flow rates to the discharge opening are present in an optimum range. Further preferably, in the bottom of the tube wall a discharge channel is present that slopes down to the discharge opening steeper than the inner wall of the tube. By this a better drainage of polluted water is obtained.
A further embodiment of the pre-treatment device according to the invention is characterized in that the pre-treatment device further comprises at least one further duct which is arranged parallel to the said tube, wherein a main inlet splits into the inlets of the pipes. It has been found that splitting the stream of polluted inlet gases and distributing these over several tubes, in these tubes a more optimal ratio between the tube diameter, flow velocity of polluted gas and quantity and speed of injected water-air mixture can be achieved.
Yet a further embodiment of the pre-treatment device according to the invention is characterized in that the nozzle comprises a nozzle head which comprises two parts between which a spray slit is formed, of which parts one first part has a shape of a spherical segment or partial sphere or a cone or truncated cone, and the other, second part has a conical shape congruent to the shape of the first part of which the dish surface is at a distance from the conical or spherical surface, wherein the second part is provided with one or more holes for the water-air mixture, and wherein the nozzle is provided with adjusting means for moving the parts toward one another and away from each other. By this shape of the nozzle there is little chance that dirt or lime particles will get stuck in the spray slit get stuck.
Preferably, the second part is provided with a plurality holes which are evenly distributed over the dish surface.
In addition, the shapes of the parts are such that the spray slit decreases outwardly from the center.
The adjusting means comprise preferably a threaded rod and a nut present thereon, wherein the two parts are provided with a central through hole through which the threaded rod crosses, and the nut is present on one side of both parts and can move the first part to and from the second part. Brief description of the drawings Below, the invention will be elucidated on the basis of an exemplary embodiment shown in the drawings of the pre-treatment device according to the invention. In these drawings:
Figure 1 is a scrubber system with a pre-treatment apparatus and a wet scrubber;
Figure 2 shows the nozzle of the pre-treatment device in detail; and Figure 3 shows the nozzle in perspective.
Detailed description of the drawings
In Figure 1, a scrubber system 1 is equipped with a pre-treatment device 3 according to the invention. This scrubber system has a wet scrubber 5 where contaminants are removed from vapor. In order to increase the degree of efficiency of the gas scrubber, the polluted vapor is pre-cleaned before it enters the scrubber. This is done in the pre-treatment apparatus in which nozzles 7 are provided in which circulation fluid is nebulized with compressed air. A part of the circulation fluid (approximately 20%) is entrained by the vapor to a scrubber column and will accumulate in a tank 9. The remaining part (about 80%) is fed to a tank 11 through a return conduit. In the case of pollution which condensates, there may arise a floating layer of the pollution in the tank 11. When there is arisen a floating layer, at filling the large compartment 11A this floating layer can go over to the small compartment 11B. As a result, the concentrated contamination can be removed saving of waste water. The circulation of the circulation fluid is maintained by a pump 13. The tank 11 constitutes the water buffer for the circulation system. This water is cooled by a water cooler 15 to 1 degree Celsius in order to condense. As much as possible pollution is present in the vapor.
The pre-treatment device 3 has two tubes 17, which are arranged parallel to each other and are each provided with an inlet 19 for contaminated vapors and an outlet 21 for pre-purified vapor. The two inlets are connected to a common main inlet. The inlet is located near the nozzle 7 in the tube, which is present in the middle of the tube seen in cross-section. During operation this nozzle sprays a water-air mixture 23 in the vapor stream. The diameter of the tubes is selected such that there is a proper ratio of the spray and the amount of vapor which is pressed through the tubes. This results in optimum contact between the vapor and the liquid circulation. The tubes 17 are arranged in an inclined position whereby the inlet is at a higher level than the outlet. The tubes are located between 5 and 30 degrees relative to the horizontal. Each tube is further provided with a discharge opening 25 for contaminated water, which is located close to the outlet in a lower side of the tube wall. In the bottom of the tube a discharge chute 27 is provided which slopes down towards the discharge opening.
In Figure 2, the nozzle 7 is shown in detail. The nozzle has a housing 29 which is formed by a pipe open at one end. This open end is closed off by a nozzle head 31 which has two parts between which a spray slit 33 is present. A first one of these parts 31A has a shape of a spherical cap, and the other, second part 31B has a conical shape congruent thereto, of which conical shape the dish surface is present at a distance from the spherical surface. The parts are formed such that the spray slit decreases outwardly from the center. The second part is provided with a plurality of evenly over the dish surface distributed holes 35 for the air-water mixture. In Figure 3, the nozzle 7 is shown in perspective. Herein, the holes 35 in the dish surface are clearly visible.
The nozzle 7 is provided with adjusting means for moving the parts the towards each other and away from each other. These adjustment means are formed by a threaded rod 37 with a wing nut 39 thereon. The threaded rod extends through a central through-hole 41 present in the two parts. The wing nut is present on one side of the two parts and will move to or from the second part 3 IB upon rotation the first part 31A. The distance between the parts preferably has to be regularly adjusted.
Although the invention has been described in the foregoing based on the drawings, it should be observed that the invention is not by any manner or means restricted to the embodiment shown in the drawings. The invention also extends to all embodiments deviating from the embodiment shown in the drawings within the scope defined by the claims.

Claims

CLAIMS:
1. Pre-trcatment device (3) for use in a wet scrubber (5) for the purification of contaminated vapors, comprising a tube (17) provided with an inlet (19) for contaminated vapors and an outlet (21) for pre-purified vapor, as well as seen in a cross- section in the middle of the tube near the inlet a nozzle (7) for spraying a water-air mixture (23) in the vapor stream, characterized in that the tube (17) is arranged in an inclined position in which the inlet (19) is at a higher level than the outlet (21), and that the tube an provided with a discharge opening (25) for contaminated water, which opening is located close to the outlet in a lower side of the tube wall.
2. Pre-treatment device (3) according to claim 1, characterized in that the tube (17) is arranged between 5 and 30 degrees relative to the horizontal plane.
3. Pre-treatment device (3) according to claim 1 or 2, characterized in that in the bottom of the tube wall a discharge channel (27) is present that slopes down to the discharge opening (25) steeper than the inner wall of the tube.
4. Pre-treatment device (3) according to claim 1, 2 or 3, characterized in that the pre-treatment device further comprises at least one further duct which is arranged parallel to the said tube (17), wherein a main inlet splits into the inlets (19) of the pipes (17).
5. Pre-treatment device (3) according to any one of the preceding claims, characterized in that the nozzle (7) comprises a nozzle head (31) which comprises two parts between which a spray slit (33) is formed, of which parts one first part (31A) has a shape of a spherical segment or partial sphere or a cone or truncated cone, and the other, second part (3 IB) has a conical shape congruent to the shape of the first part of which the dish surface is at a distance from the conical or spherical surface, wherein the second part is provided with one or more holes (35) for the water-air mixture (23), and wherein the nozzle (7) is provided with adjusting means (37, 39) for moving the parts toward one another and away from each other.
6. Pre-treatment device (3) according to claim 5, characterized in that the second part (3 IB) is provided with a plurality holes (35) which are evenly distributed over the dish surface.
7. Pre-treatment device (3) according to claim 5 or 6, characterized in that the shapes of the parts (31 A, 3 IB) are such that the spray slit (33) decreases outwardly from the center.
8. Pre-treatment device (3) according to claim 5, 6 or 7, characterized in that the adjustment means comprise a threaded rod (37) and a nut (39) present thereon, wherein the two parts are provided with a central through hole through which the threaded rod crosses, and the nut (39) is present on one side of both parts and can move the first part to and from the second part.
PCT/NL2014/050394 2013-06-14 2014-06-16 Pre-treatment apparatus for a wet scrubber WO2014200353A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14759068.1A EP3007800A1 (en) 2013-06-14 2014-06-16 Pre-treatment apparatus for a wet scrubber

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2010972 2013-06-14
NL2010972A NL2010972C2 (en) 2013-06-14 2013-06-14 PRE-TREATMENT DEVICE FOR A WET GAS WASHER.

Publications (1)

Publication Number Publication Date
WO2014200353A1 true WO2014200353A1 (en) 2014-12-18

Family

ID=51485818

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2014/050394 WO2014200353A1 (en) 2013-06-14 2014-06-16 Pre-treatment apparatus for a wet scrubber

Country Status (3)

Country Link
EP (1) EP3007800A1 (en)
NL (2) NL2010972C2 (en)
WO (1) WO2014200353A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016068778A1 (en) * 2014-10-29 2016-05-06 Climeon Ab Method for contacting a gas composition with a liquid composition
WO2020221500A1 (en) * 2019-04-30 2020-11-05 Voith Patent Gmbh Injector nozzle, mixing assembly and use of the injector nozzle
CN113828432A (en) * 2021-09-30 2021-12-24 宜宾海丰和锐有限公司 Nozzle structure

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2938599A (en) * 1956-08-10 1960-05-31 Shell Oil Co Soot removal from gases
SU946615A1 (en) * 1980-05-21 1982-07-30 Государственный Ордена Трудового Красного Знамени Проектный Институт "Ленинградский Промстройпроект" Injection nozzle for spraying hymidifying liquid in wet dust traps
FR2688708A1 (en) * 1992-03-19 1993-09-24 Bellmann Michel Plant for removing dust from and for scrubbing gas
JPH07116447A (en) * 1993-10-20 1995-05-09 Mazda Motor Corp Dust collector for cooling tank
JP2000061237A (en) * 1998-08-18 2000-02-29 Honda Lock Mfg Co Ltd Wet type dust collector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2938599A (en) * 1956-08-10 1960-05-31 Shell Oil Co Soot removal from gases
SU946615A1 (en) * 1980-05-21 1982-07-30 Государственный Ордена Трудового Красного Знамени Проектный Институт "Ленинградский Промстройпроект" Injection nozzle for spraying hymidifying liquid in wet dust traps
FR2688708A1 (en) * 1992-03-19 1993-09-24 Bellmann Michel Plant for removing dust from and for scrubbing gas
JPH07116447A (en) * 1993-10-20 1995-05-09 Mazda Motor Corp Dust collector for cooling tank
JP2000061237A (en) * 1998-08-18 2000-02-29 Honda Lock Mfg Co Ltd Wet type dust collector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016068778A1 (en) * 2014-10-29 2016-05-06 Climeon Ab Method for contacting a gas composition with a liquid composition
WO2020221500A1 (en) * 2019-04-30 2020-11-05 Voith Patent Gmbh Injector nozzle, mixing assembly and use of the injector nozzle
CN113828432A (en) * 2021-09-30 2021-12-24 宜宾海丰和锐有限公司 Nozzle structure

Also Published As

Publication number Publication date
NL2014051B1 (en) 2016-08-31
NL2014051A (en) 2015-01-21
NL2010972C2 (en) 2014-12-31
EP3007800A1 (en) 2016-04-20

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