CA1207821A - Nozzle for the atomizing of a liquid containing a suspension of solid particles - Google Patents
Nozzle for the atomizing of a liquid containing a suspension of solid particlesInfo
- Publication number
- CA1207821A CA1207821A CA000415112A CA415112A CA1207821A CA 1207821 A CA1207821 A CA 1207821A CA 000415112 A CA000415112 A CA 000415112A CA 415112 A CA415112 A CA 415112A CA 1207821 A CA1207821 A CA 1207821A
- Authority
- CA
- Canada
- Prior art keywords
- gas
- liquid
- nozzle
- atomizing
- mist
- 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.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/003—Arrangements of devices for treating smoke or fumes for supplying chemicals to fumes, e.g. using injection devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
- B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
- B05B7/0441—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber
- B05B7/0475—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber with means for deflecting the peripheral gas flow towards the central liquid flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
- B05B7/0892—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point the outlet orifices for jets constituted by a liquid or a mixture containing a liquid being disposed on a circle
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
- Nozzles (AREA)
- Gas Separation By Absorption (AREA)
- Seasonings (AREA)
- Luminescent Compositions (AREA)
- Photoreceptors In Electrophotography (AREA)
Abstract
ABSTRACT
The invention relates to a nozzle for the atomization of a liquid containing a suspension of solid particles with the aid of an atomizing gas, more specifically a two-phase nozzle of the internal-mix type that is primarily intended for atomization of an absorbent suspended in liqiuid in a plant for the removal of sulphur dioxide from flue gases according to the dry scrubbing method. The atomizing of large flows of such a liquid suspension entails difficult problems with clogging and non-uniform liquid distribution as well as nozzle wear. These problems are solved according to the invention by the fact that the nozzle (1) consists of a symmetric central body (2) with a cavity (3) into which a central liquid main (4) feeds, between three and ten mist orifices (5) arranged symmetrically around the central body, consisting of tubular housings (6) whose longitudinal axes (7) form an angle (v) of between 20 and 90° with the longi-tudinal axis (8) of the central body. Each mist orifice has a circular outlet opening (9) with a diameter of between 1 and 10 mm and with a radially symmetric atomizing zone (11) that is supplied individually with atomizing gas from a tubular gas orifice (12) installed upstream of the outlet opening (9), which is provided with a seat (13) and a wear protection liner (14). The gas orifices (12) are connected to a gas distribution line (15), which is concentrically arranged around the liquid main. The mist orifices (5) are designed for atomization of a liquid flow of between 0 and 20 000 kg/m2s with a gas flow of between 500 and 2 500 kg/m2s, figured over the area of the outlet opening (9), and with a pressure of between 2 and 12 bar in the gas and the liquid.
The invention relates to a nozzle for the atomization of a liquid containing a suspension of solid particles with the aid of an atomizing gas, more specifically a two-phase nozzle of the internal-mix type that is primarily intended for atomization of an absorbent suspended in liqiuid in a plant for the removal of sulphur dioxide from flue gases according to the dry scrubbing method. The atomizing of large flows of such a liquid suspension entails difficult problems with clogging and non-uniform liquid distribution as well as nozzle wear. These problems are solved according to the invention by the fact that the nozzle (1) consists of a symmetric central body (2) with a cavity (3) into which a central liquid main (4) feeds, between three and ten mist orifices (5) arranged symmetrically around the central body, consisting of tubular housings (6) whose longitudinal axes (7) form an angle (v) of between 20 and 90° with the longi-tudinal axis (8) of the central body. Each mist orifice has a circular outlet opening (9) with a diameter of between 1 and 10 mm and with a radially symmetric atomizing zone (11) that is supplied individually with atomizing gas from a tubular gas orifice (12) installed upstream of the outlet opening (9), which is provided with a seat (13) and a wear protection liner (14). The gas orifices (12) are connected to a gas distribution line (15), which is concentrically arranged around the liquid main. The mist orifices (5) are designed for atomization of a liquid flow of between 0 and 20 000 kg/m2s with a gas flow of between 500 and 2 500 kg/m2s, figured over the area of the outlet opening (9), and with a pressure of between 2 and 12 bar in the gas and the liquid.
Description
The present invention relates to a nozzle for atomization of a liquid with the aid of an atomizing gas, in which the liquid consists of a suspension of solid particles.
Nozzles of differe~t types are used to atomize liquids. One class of nozzles that are used to create a very finely dispersed liguid mist are so-called two-phase ~lozzles. .In these ~evices, a pressurized gas is used to ~ring about atomization, which takes place when the gas, which has been accelerated under expansion, acts on a liquid surface that is travelling at a velocity that differs greatly from that of the gas. Two phase nozzles can be divided illtO two types, which difer with respe~t to whether the two phases meet in~ide or outside the nozæle. In the technical literature, these two ~ypes are termed internal~mix and ex~ernal-mi~
nozzles/ respect~ively.
Twc-phase nozzles of the internal-mix type, to which category the present in~ention can be assigned, are also characterized by the fact that, given o~herwise uniform conditions, a more finely dispersed mist is produced in a nozzle in which the linear dimensions of the atomization zone are of a given size than is the case in a geometrically identical nozzle of larger dimonsion6. In view of ~his circumstance, among a others, nozzles with small p~ssage~ are often used to, for example, atomize pur~ water in connection W~l the evaporative cooling of a gas, or in connection with ~he spray-drying of a s~lution. Nor are such nozzles designed Wi~l a view towards the wear that would occur if these nozzles we;ce to be used for the atomizing of liquids with more abrasive properties, e.g. suspe~sions containing hard, soli~ particles~ When L large quant~ties of gas are to be cooled e~aporatively, for exampl~, a ~umber of nozzles are often incorporated in a ': ~' ~ .
1~782~
r ~ank of nozzles, consisting of a large number of nozzles each of which is supplied with liquid and atomizing gas.
Such a bank of nozzles has the disadvantage that if the relatively narrow passages in one nozzle become clogged, this contributes relatively greatly towards increasing the flow resistance over the nozzle in question and thereby to an uneven distribution of atomized liquid in ~le chamber in which the bank of nozzles is located. Thus, two-phase nozzles of the conventional type are not very well suited for the atomizing of large quantities of suspensions containing relatively large solid particles, as in connection with the scrubbing of flue gases to remove sulphur dio~ide according to the so-called dry scrubbing method, which method is described in greater detail below.
The purpose of the present invention is to specify a nozzle that possesses such gualities ~hat the a~orementioned draw-backs are eliminated.
In general terms and defining the invention in the broadest sense, the nozzle consists of a symmetric central body with a cavity into which a central lic~id main feeds, at least three mist orifices being arranged symmetrically around the central body, each consisting of a tubular housing ancl being arranged in ` such a manner that the extensions of their longitudinal axis con-verge in a common point on the longitudinal axis of the central body, forming an angle with this body that is between 20 and 90.
Each mist orifice has a circular outlet opening with a diameter of between 1 and lOmm and a radially symmetric atomizing æone with a longitudinal axis that coincides with the longitudinal axis of the mist orifice; each atomizing zone is arranged for individual supply with the atomizing gas from a tubular gas orifice located ~78~
r upstream of the outlet opening. The longitudinal axis of the gas orifice coincides with the longitudinal axis of the mist orLfice.
The cavity forms, together with the centr,al liquid main, an int volume that envelops the gas orifice and their atomizing zones.
The invention will now be descri~ed in greater detail with referenc2 to the appended figures, where figure 1 shows a schematic cross-section of a noz21e according to the invention figure 2 shows the nozzle installed in a ~lue ga~
cleaning plant.
In figure 1, 1 is a nozzle consisting of a symmetric central body 2 with a ca~ity 3 into which a central liquid main ~eeds. In the version shown, the nozzle is eguipped with three symmetrically arranged mist orifices 5, two of which are shown in the figure. T~e number of mist orifices can, however, be varied between three and ten depending upon the application. Each mist orifice consists of a tubular housing 6 provided at its outer end with an outlet opening 9 which is circular and has a diameter of be~wee~ 1 an~ 10 mm.
I~side the mist orifice is an atomizing zone 11 wi~h a radially symmetric shape. A tu~ular gas orifice 12 is arranged upstream of the outlet opening 9. The ratio between the diameter of the outlet opening 9 and the inside diameter of the gas orifice 1~ is between O.1 and 0.5. The longitudinal axis 7 of the mis~ oriice coincides with the lo~gitudinal a~is of both the atomizing zone and the gas ori~ice, these together thereby ~orming a s~mmetric configuratio~. Further-moxe, the imaginary extension of ~he longitudinal axis of every mist orifice emanate~ rom the sa~e point on the longi~udinal axis 8 of the central bod~ and forms an angle v L with this axis of between 20 a~d 9C. The cavity 3 forms an integral volume tog-ther with the liqu:id m~in 4, which 3 2~7~2:~L
volume envelops the gas orifices 12 and their atomizing zones ll. The gas orifices 12 are furt~er connected to a common gas distribution line 15, which is concentrically arranged around the liquid main 4.
In brief, the function of the nozzle is as follows: When liquid is supplied through the central liquid main 4, the cavity 3 inside the central body 2 is filled, as are the cavities in the mist orifices. The liquid is supplied at a - pressure of between 2 and 12 bar. When atomizing gas of sufficiently high pressure (between 2 and 12 bar, but higher than ~he pressure of the liquid) is supplied ~hrough the gas orifices 12, an atomizing zone ll is formed in front of each gas orifice. A two-phase flow will therefore exist in the narrowest section of the mist orifice, i.e. at its outlet opening 9. I~f the pressure inside the mist orifice is suf~
ficiently high, the flow through this section, i.e. in the entire atomizing zone 11, will also be of a critical character.
As is evident from the above description, the invention is distinguished by, among other things r the fact that the risk of clogging has been eliminated through the r~latively large ~ize of all liquid passages. The zone in which the flow velocity is high is designed so that surrounding boundary surfaces form a small angle to the flow direction, which contributes towards a low wear rate. The araa exposed to the greatest wear has further been designed in such a manner that a ceramic insert mounted there aæ a wear protectio~
liner 14, arranged o~ a seat 13, exists in a more or less stressless state, which permits the use of material of low tensile strength as a wear protection liner. The nozzle is designed for ~he atomizing of a liguild flow of between 0 and L 20 000 kg/m2s figured over the area of the outlet opening 9, and the gas flow over the same area is between 500 and
Nozzles of differe~t types are used to atomize liquids. One class of nozzles that are used to create a very finely dispersed liguid mist are so-called two-phase ~lozzles. .In these ~evices, a pressurized gas is used to ~ring about atomization, which takes place when the gas, which has been accelerated under expansion, acts on a liquid surface that is travelling at a velocity that differs greatly from that of the gas. Two phase nozzles can be divided illtO two types, which difer with respe~t to whether the two phases meet in~ide or outside the nozæle. In the technical literature, these two ~ypes are termed internal~mix and ex~ernal-mi~
nozzles/ respect~ively.
Twc-phase nozzles of the internal-mix type, to which category the present in~ention can be assigned, are also characterized by the fact that, given o~herwise uniform conditions, a more finely dispersed mist is produced in a nozzle in which the linear dimensions of the atomization zone are of a given size than is the case in a geometrically identical nozzle of larger dimonsion6. In view of ~his circumstance, among a others, nozzles with small p~ssage~ are often used to, for example, atomize pur~ water in connection W~l the evaporative cooling of a gas, or in connection with ~he spray-drying of a s~lution. Nor are such nozzles designed Wi~l a view towards the wear that would occur if these nozzles we;ce to be used for the atomizing of liquids with more abrasive properties, e.g. suspe~sions containing hard, soli~ particles~ When L large quant~ties of gas are to be cooled e~aporatively, for exampl~, a ~umber of nozzles are often incorporated in a ': ~' ~ .
1~782~
r ~ank of nozzles, consisting of a large number of nozzles each of which is supplied with liquid and atomizing gas.
Such a bank of nozzles has the disadvantage that if the relatively narrow passages in one nozzle become clogged, this contributes relatively greatly towards increasing the flow resistance over the nozzle in question and thereby to an uneven distribution of atomized liquid in ~le chamber in which the bank of nozzles is located. Thus, two-phase nozzles of the conventional type are not very well suited for the atomizing of large quantities of suspensions containing relatively large solid particles, as in connection with the scrubbing of flue gases to remove sulphur dio~ide according to the so-called dry scrubbing method, which method is described in greater detail below.
The purpose of the present invention is to specify a nozzle that possesses such gualities ~hat the a~orementioned draw-backs are eliminated.
In general terms and defining the invention in the broadest sense, the nozzle consists of a symmetric central body with a cavity into which a central lic~id main feeds, at least three mist orifices being arranged symmetrically around the central body, each consisting of a tubular housing ancl being arranged in ` such a manner that the extensions of their longitudinal axis con-verge in a common point on the longitudinal axis of the central body, forming an angle with this body that is between 20 and 90.
Each mist orifice has a circular outlet opening with a diameter of between 1 and lOmm and a radially symmetric atomizing æone with a longitudinal axis that coincides with the longitudinal axis of the mist orifice; each atomizing zone is arranged for individual supply with the atomizing gas from a tubular gas orifice located ~78~
r upstream of the outlet opening. The longitudinal axis of the gas orifice coincides with the longitudinal axis of the mist orLfice.
The cavity forms, together with the centr,al liquid main, an int volume that envelops the gas orifice and their atomizing zones.
The invention will now be descri~ed in greater detail with referenc2 to the appended figures, where figure 1 shows a schematic cross-section of a noz21e according to the invention figure 2 shows the nozzle installed in a ~lue ga~
cleaning plant.
In figure 1, 1 is a nozzle consisting of a symmetric central body 2 with a ca~ity 3 into which a central liquid main ~eeds. In the version shown, the nozzle is eguipped with three symmetrically arranged mist orifices 5, two of which are shown in the figure. T~e number of mist orifices can, however, be varied between three and ten depending upon the application. Each mist orifice consists of a tubular housing 6 provided at its outer end with an outlet opening 9 which is circular and has a diameter of be~wee~ 1 an~ 10 mm.
I~side the mist orifice is an atomizing zone 11 wi~h a radially symmetric shape. A tu~ular gas orifice 12 is arranged upstream of the outlet opening 9. The ratio between the diameter of the outlet opening 9 and the inside diameter of the gas orifice 1~ is between O.1 and 0.5. The longitudinal axis 7 of the mis~ oriice coincides with the lo~gitudinal a~is of both the atomizing zone and the gas ori~ice, these together thereby ~orming a s~mmetric configuratio~. Further-moxe, the imaginary extension of ~he longitudinal axis of every mist orifice emanate~ rom the sa~e point on the longi~udinal axis 8 of the central bod~ and forms an angle v L with this axis of between 20 a~d 9C. The cavity 3 forms an integral volume tog-ther with the liqu:id m~in 4, which 3 2~7~2:~L
volume envelops the gas orifices 12 and their atomizing zones ll. The gas orifices 12 are furt~er connected to a common gas distribution line 15, which is concentrically arranged around the liquid main 4.
In brief, the function of the nozzle is as follows: When liquid is supplied through the central liquid main 4, the cavity 3 inside the central body 2 is filled, as are the cavities in the mist orifices. The liquid is supplied at a - pressure of between 2 and 12 bar. When atomizing gas of sufficiently high pressure (between 2 and 12 bar, but higher than ~he pressure of the liquid) is supplied ~hrough the gas orifices 12, an atomizing zone ll is formed in front of each gas orifice. A two-phase flow will therefore exist in the narrowest section of the mist orifice, i.e. at its outlet opening 9. I~f the pressure inside the mist orifice is suf~
ficiently high, the flow through this section, i.e. in the entire atomizing zone 11, will also be of a critical character.
As is evident from the above description, the invention is distinguished by, among other things r the fact that the risk of clogging has been eliminated through the r~latively large ~ize of all liquid passages. The zone in which the flow velocity is high is designed so that surrounding boundary surfaces form a small angle to the flow direction, which contributes towards a low wear rate. The araa exposed to the greatest wear has further been designed in such a manner that a ceramic insert mounted there aæ a wear protectio~
liner 14, arranged o~ a seat 13, exists in a more or less stressless state, which permits the use of material of low tensile strength as a wear protection liner. The nozzle is designed for ~he atomizing of a liguild flow of between 0 and L 20 000 kg/m2s figured over the area of the outlet opening 9, and the gas flow over the same area is between 500 and
2 500 kg/m2s.
782~ -Figure 2 shows a flue gas cleaning plant 20 for the cleaniny of flue gases from a coal-fired power and/or heating plant (not shown). The flue gases are first conducted to an electro-static precipitator 21, which separates about 90% o~ the dust formed by combustion. The still hot and sulphur-dioxide-bearing flue gases are then conducted to an S02 reactor 22 in which a finely dispersed lime slurry is sprayed into the flue gases. This is done with the a:Ld of the nozzles 1 mounted in the reactor inlet, which are supplied with lime slurry prepared in a feed tank 23 and pumped at high pressure via a liguid line 24 to the central liquid mains 4 for the nozzles 1 (figure 1). The lime reacts with the sulphur dioxide and binds it. The amount of water and the temp~rature are adjusted so that all the water evaporates before the lime reaches the bottom, which results in dry residual products and greatly facilitates their handling. Some sulphur-bearing lime sinks to the bottom, where it is taken out, while the remainder continues to a ~Eabric filter ~5, where most of the remaining flue gas part:icles adhere to the filter material. At regular intervals, the filter bags are blown clean by short pulses of compressed air. The dust that is dislodged falls to the bottom and is discharged. The flue gases now cleaned from dust, ash and sulphur dioxide - are then discharged via the flue ga~ fan 26 into the atmosphere through the stack 27. In the plant described here, the flue gase~ can be cleaned so efficiently - via this dry scrubbing method, where the nozzles according to the inven~ion are employed to provide an effective dispersion of the supplied absorbent suspension - that the leaving sulphur concentration is max. 0.1 srams of sulphur per megajoule of supplied fu~l, wh~ch is equivalent to a collection efficiency of 70-85%, L depending upon the sulphur content of the coal.
- ~2~7l3~L
The technical effect obtained with a nozzle according to khe invention can be further illustrated by the following example, which relates to the dry scrubbing method described above.
The distribution of the liquid flow from each mist orifice was studied in the following manner. Four nozzles designed according to the invention, each equipped with five mist orifices with a minimum opening diameter of 4.0 mm, were supplied with compressed air from a common compressor and with a liquid suspension from a common pump. The liquid suspension used in the test consisted of a mi~ture of 60%
water, 3Q% fly ash from powdered coal firing and 10% of a mixture of calcium sulphite and calcium hydroxide ~all percentages by weight). The liquid flow from each of the mist orifices was then measured as -the aggregate liquid 10w was varied between 1 500 kg/h and 12 000 kg/h. The range of variation in the results, consisting of the liquid flow measured from each of the 20 mist orifices for each aggregate flow, was determined, with the ~ollowing results:
Aggregate liquid flow Range of variation .,. ~, kgjh % of mean 1 500 1.3
782~ -Figure 2 shows a flue gas cleaning plant 20 for the cleaniny of flue gases from a coal-fired power and/or heating plant (not shown). The flue gases are first conducted to an electro-static precipitator 21, which separates about 90% o~ the dust formed by combustion. The still hot and sulphur-dioxide-bearing flue gases are then conducted to an S02 reactor 22 in which a finely dispersed lime slurry is sprayed into the flue gases. This is done with the a:Ld of the nozzles 1 mounted in the reactor inlet, which are supplied with lime slurry prepared in a feed tank 23 and pumped at high pressure via a liguid line 24 to the central liquid mains 4 for the nozzles 1 (figure 1). The lime reacts with the sulphur dioxide and binds it. The amount of water and the temp~rature are adjusted so that all the water evaporates before the lime reaches the bottom, which results in dry residual products and greatly facilitates their handling. Some sulphur-bearing lime sinks to the bottom, where it is taken out, while the remainder continues to a ~Eabric filter ~5, where most of the remaining flue gas part:icles adhere to the filter material. At regular intervals, the filter bags are blown clean by short pulses of compressed air. The dust that is dislodged falls to the bottom and is discharged. The flue gases now cleaned from dust, ash and sulphur dioxide - are then discharged via the flue ga~ fan 26 into the atmosphere through the stack 27. In the plant described here, the flue gase~ can be cleaned so efficiently - via this dry scrubbing method, where the nozzles according to the inven~ion are employed to provide an effective dispersion of the supplied absorbent suspension - that the leaving sulphur concentration is max. 0.1 srams of sulphur per megajoule of supplied fu~l, wh~ch is equivalent to a collection efficiency of 70-85%, L depending upon the sulphur content of the coal.
- ~2~7l3~L
The technical effect obtained with a nozzle according to khe invention can be further illustrated by the following example, which relates to the dry scrubbing method described above.
The distribution of the liquid flow from each mist orifice was studied in the following manner. Four nozzles designed according to the invention, each equipped with five mist orifices with a minimum opening diameter of 4.0 mm, were supplied with compressed air from a common compressor and with a liquid suspension from a common pump. The liquid suspension used in the test consisted of a mi~ture of 60%
water, 3Q% fly ash from powdered coal firing and 10% of a mixture of calcium sulphite and calcium hydroxide ~all percentages by weight). The liquid flow from each of the mist orifices was then measured as -the aggregate liquid 10w was varied between 1 500 kg/h and 12 000 kg/h. The range of variation in the results, consisting of the liquid flow measured from each of the 20 mist orifices for each aggregate flow, was determined, with the ~ollowing results:
Aggregate liquid flow Range of variation .,. ~, kgjh % of mean 1 500 1.3
3 000 ~.9 6 000 1.1 L
Claims (8)
1 Nozzle for atomization of a liquid with the aid of an atomizing gas, where the liquid consists of a suspension of solid particles, characterized in that the nozzle (1) consists of a symmetric central body (2) with a cavity (3) into which a central liquid main (4) feeds, at least three mist orifices being arranged sym-metrically around the central body, each consisting of a tubular housing (6) and being arranged in such a manner that the extensions of their longitudinal axes (7) converge in a common point on the longitudinal axis (8) of the central body, forming an angle (v) with this body that is between 20 and 90°; that each mist orifice has a circular outlet opening (9) with a diameter of between 1 and 10 mm and a radially symmetric atomizing zone (11) with a longitudinal axis that coincides with the longitudinal axis (7) of the mist orifice; that each atomizing zone is arranged for individual supply with the atomizing gas from a tubular gas orifice (12) located upstream of the outlet opening (9); that the longitudinal axis of the gas orifice coincides with the longitudinal axis (7) of the mist orifice; and that the cavity (3) forms, together with the central liquid main (4), an integral volume that envelops the gas orifices (12) and their atomizing zones (11).
2 Nozzle according to patent claim 1, characterized in that the ratio between the diameter of the outlet opening (9) and the diameter of the gas orifice (12) is between 0.1 and 0.5.
3 Nozzle according to patent claims 1, characterized in that each mist orifice (5) has a seat (13) at the outlet opening (9) in which a wear protection liner (14) in the form of an insert is mounted, the gas and liquid pressure imparting a more or less stressless state to the wear protection liner.
4 Nozzle according to patent claims 1-3, characterized in that each gas orifice (12) is connected to a common gas distribution line (15) arranged concentrically around the liquid main.
Nozzle according to patent claims 1-3, characterized in that the mist orifices (5) are arranged for atomization of a liquid flow of between 0 and 20 000 kg/m2s, figured over the area of the outlet opening (9), with a gas flow of between 500 and 2 500 kg/m2s figured over the same area.
6 Nozzle according to patent claims 1-3, characterized in that the central liquid main (4) and the gas orifices (12) are arranged to be connected to a liquid/
gas source that supplies a pressure of between 2 and 12 bar.
gas source that supplies a pressure of between 2 and 12 bar.
7 Nozzle according to patent claims 1-3, characterized in that the number of mist orifices (5) arranged around the central body (2) is between three and ten.
8 Nozzle according to patent claims 1-3, where the nozzle is installed in an SO2 reactor for atomizing of an absorbent suspended in water, characterized in that the liquid main (4) for the nozzle (1) is connected to a liquid line (24) that is common for at least one other nozzle (1) located in the same reactor (22).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8106637-5 | 1981-11-09 | ||
| SE8106637A SE449057B (en) | 1981-11-09 | 1981-11-09 | NOZE FOR ATOMIZING A LIQUID MEDIUM |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1207821A true CA1207821A (en) | 1986-07-15 |
Family
ID=20344997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000415112A Expired CA1207821A (en) | 1981-11-09 | 1982-11-08 | Nozzle for the atomizing of a liquid containing a suspension of solid particles |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0079081B1 (en) |
| AT (1) | ATE29974T1 (en) |
| CA (1) | CA1207821A (en) |
| DE (2) | DE3277403D1 (en) |
| DK (1) | DK157332C (en) |
| FI (1) | FI73149C (en) |
| NO (1) | NO158567C (en) |
| SE (1) | SE449057B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE452413B (en) * | 1984-12-04 | 1987-11-30 | Flaekt Ab | MEDIUM MIXING NOZE, INTENDED TO BE USED IN A CONTACT REACTOR |
| SE447704B (en) * | 1985-04-16 | 1986-12-08 | Flaekt Ab | CONTACT REACTOR DEVICE INCLUDING MEASURES TO PREVENT RECYCLING OF ABSORPTION MATERIALS TO THE SIZE SURFACE |
| SE500419C2 (en) * | 1992-10-08 | 1994-06-20 | Flaekt Ab | Nozzle for atomizing a liquid with pressurized gas |
| DE102017001025B4 (en) | 2017-02-03 | 2020-10-08 | Rs Rittel Gmbh | Incinerator and waste gas treatment process |
| EP3829750A1 (en) * | 2018-08-03 | 2021-06-09 | RS Rittel GmbH | Spray lance, combustion plant and method for treating waste gas |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2547084A (en) * | 1950-04-15 | 1951-04-03 | West Disinfecting Co | Spraying device |
| FR1239405A (en) * | 1959-07-16 | 1960-08-26 | Sprinkler improvements | |
| US3110444A (en) * | 1960-12-06 | 1963-11-12 | J S & W R Eakins Inc | Spray drying process and apparatus |
| FR1428682A (en) * | 1964-03-10 | 1966-02-18 | Ici Ltd | Method and apparatus for spraying particulate solids and liquids |
| JPS5117145B2 (en) * | 1971-09-10 | 1976-05-31 |
-
1981
- 1981-11-09 SE SE8106637A patent/SE449057B/en unknown
-
1982
- 1982-11-08 DK DK496482A patent/DK157332C/en not_active IP Right Cessation
- 1982-11-08 NO NO823705A patent/NO158567C/en not_active IP Right Cessation
- 1982-11-08 CA CA000415112A patent/CA1207821A/en not_active Expired
- 1982-11-09 DE DE8282110320T patent/DE3277403D1/en not_active Expired
- 1982-11-09 DE DE198282110320T patent/DE79081T1/en active Pending
- 1982-11-09 FI FI823845A patent/FI73149C/en not_active IP Right Cessation
- 1982-11-09 EP EP82110320A patent/EP0079081B1/en not_active Expired
- 1982-11-09 AT AT82110320T patent/ATE29974T1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| DE79081T1 (en) | 1984-11-08 |
| EP0079081B1 (en) | 1987-09-30 |
| FI73149B (en) | 1987-05-29 |
| DK157332B (en) | 1989-12-18 |
| ATE29974T1 (en) | 1987-10-15 |
| SE8106637L (en) | 1983-05-10 |
| FI823845A0 (en) | 1982-11-09 |
| FI73149C (en) | 1987-09-10 |
| NO823705L (en) | 1983-05-10 |
| NO158567B (en) | 1988-06-27 |
| EP0079081A2 (en) | 1983-05-18 |
| DK157332C (en) | 1990-05-14 |
| DE3277403D1 (en) | 1987-11-05 |
| SE449057B (en) | 1987-04-06 |
| EP0079081A3 (en) | 1984-05-30 |
| DK496482A (en) | 1983-05-10 |
| NO158567C (en) | 1988-10-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |