Title of Invention	COOLING EQUIPMENT AND METHOD FOR COOLING LIQUID THEREIN
Abstract	The invention relates to a cooling equipment (1) for cooling liquid, comprising: a cooling tower (2) that is mainly cylindrical in the vertical direction, in which case the cooling air feed equipment (8) and the exhaust air discharge equipment (12) are arranged, with respect to the cooling tower (2), so that both the cooling air flowing direction (7) from the inlet aperture (9) to the cooling space (6) and the exhaust air flowing direction (14) from the discharge equipment (12) is horizontal and parallel to the tangent (15) of the outer surface (3) of the cooling tower. The invention also relates to a method for cooling liquid.

Title of Invention

COOLING EQUIPMENT AND METHOD FOR COOLING LIQUID THEREIN

Abstract

The invention relates to a cooling equipment (1) for cooling liquid, comprising: a cooling tower (2) that is mainly cylindrical in the vertical direction, in which case the cooling air feed equipment (8) and the exhaust air discharge equipment (12) are arranged, with respect to the cooling tower (2), so that both the cooling air flowing direction (7) from the inlet aperture (9) to the cooling space (6) and the exhaust air flowing direction (14) from the discharge equipment (12) is horizontal and parallel to the tangent (15) of the outer surface (3) of the cooling tower. The invention also relates to a method for cooling liquid.

Full Text	The present invention relates to an arrangement and method, defined in the independent claims, for cooling a solution in a cooling tower. When separating zinc from an electrolytic solution containing zinc ions and sulfuric acid, the temperature of the electrolyte generally rises. Typically, for cooling solutions such as electrolyte, or an acidic solution containing slurries or metals, there are used cooling towers where the cooling process is based on the evaporation of liquid drops in the upwardly flowing air from the liquid drops to be cooled. Generally the air flow is colder than the liquid flow, in which case the downwardly flowing liquid is cooled owing to heat transfer. Consequently, convection takes place in the cooling process, and droplets moving against the air flow are evaporated. Heat is emitted, as the liquid is cooled in the cooling tower. In cross-section, cooling towers are typically either hexagonal or quadrangular cylinders. The solution to be cooled is conducted to the tower in a known fashion through the top part thereof, and the cooling air is fed in through the side of the cooling tower. During the cooling process, droplets containing particle material are separated from the solution. Said droplets are separated from the gas contained by the harmful particle material in separate droplet separator devices prior to letting the gas out. The separated liquid is conducted back to the cooling tower. During the cooling process, the impurities are accumulated on the tower walls and floor as well as to the droplet separator elements, which creates a need to frequent maintenance procedures. When feeding the cooling air to the cooling tower horizontally at one spot provided in the tower wall, problems arise mainly owing to an uneven distribution of the gas. When the gas is conducted horizontally to the tower, it must turn 90 degrees in order to move in the vertical direction in the cooling tower. Both this fact and the large size of the air-feeding fan with respect to the dimensions of the tower can result in an uneven distribution of the gas in the cooling space of the cooling tower. In addition, another problem has been how to ensure an efficient recovery of the droplets. Conventionally, separated droplets are collected by separator devices that are arranged horizontally against the flow. In said devices, the droplets are gathered on the surface of strip-like structures, and the liquid circulated by gravity is directed against the gas flow back to the cooling tower. The higher the gas velocity, the more effectively the droplets are separated. However, a drawback with horizontally arranged devices for collecting and separating droplets is that the gas velocity must be restricted, which reduces the efficiency of the cooling tower. In the planning of cooling towers, attention must be paid to the emissions discharged therefrom, because cooling towers are often remarkable sources of emissions in a process, for example in zinc plants. Likewise, when evaluating the functionality of cooling towers, attention must be paid to the maintenance procedures of said towers. Often the towers require several maintenance operations within a short period of time, wherefore it is important that the maintenance is carried out rapidly and easily. The efficiency of a cooling tower can be improved by enhancing an even distribution of the cooling air. Conventionally the cooling air distribution in the cooling tower has been attempted to be improved by placing an obstacle in front of the cooling air feed aperture in the vertical direction, in which case the direction of the air flow can be turned more upwardly. The publication CA 2271424 A1 discloses a cooling tower for cooling liquid. In the arrangement according to said publication, there is described a multilayer wall arrangement for a cooling tower, where the wall consists of an outer wall and an air-permeable, flexible inner wall, in which case part of the air is injected through pores arranged in the inner wall to the cooling space, where it meets the liquid to be cooled. The object of this arrangement is to remove deposits accumulated on the inner wall. However, an optimal cooling solution is not achieved by this arrangement, owing to the pressure loss caused by the inner wall. The object of the present invention is to eliminate some of the drawbacks of the prior art and to realize a new way for cooling liquid. A particular object of the invention is to introduce a new cooling equipment and method, in which case the cooling efficiency is increased both by feeding cooling air to the cooling space and by conducting the outwardly flowing air out of the cooling tower both horizontally and tangentially with respect to the cooling tower. The essential novel features of the invention are apparent from the appended claims. Remarkable advantages are connected to the invention. The invention relates to a cooling equipment for cooling liquid, comprising: a cooling tower that is mainly cylindrical in the vertical direction, said cooling tower including an outer surface, an upper part of the cooling tower and a bottom part, which together define the cooling space; cooling air feed equipment comprising at least one inlet aperture on the cooling tower outer surface; means for feeding cooling air to the inlet aperture and further to the cooling space of the cooling tower; liquid feed equipment comprising means, such as liquid nozzles, for feeding the liquid to be cooled to the cooling space, discharge equipment for the exhaust air, as well as means for removing the cooled liquid, in which case the cooling air feed equipment and the exhaust air discharge equipment are arranged, with respect to the cooling tower, so that both the flowing direction of the cooling air from the inlet aperture to the cooling space and the flowing direction of the exhaust air out of the discharge equipment is horizontal and parallel with the tangent of the outer surface of the cooling tower. By means of a cooling equipment according to the invention, an even distribution of cooling air is advantageously achieved in the cooling zone, and the cooling process is enhanced. By feeding cooling air to the cooling space horizontally, preferably in the vicinity of the bottom part of the cooling tower and in parallel with the tangent of the outer surface of the cooling tower, the component of the horizontal rotation speed of the air flow is simultaneously raised. Thus the delay time of the cooling air in the cooling space is increased, and consequently the cooling efficiency of the liquid droplets flowing in the tower is improved. According to the invention, the exhaust air discharge equipment comprises a housing element including at least four, preferably eight, outlet apertures arranged vertically with respect to the horizontal cross-section of the cooling tower. According to an embodiment of the invention, the outlet apertures are placed equidistantly in the housing element, in which case each plane parallel to the surface of the outlet aperture forms an equally large angle with the tangent of the outer surface of the cooling tower. According to an embodiment of the invention, in each outlet aperture, there is vertically installed at least one droplet separator element for separating the liquid droplets from the exhaust air. According to an embodiment of the invention, the droplet separator element is formed of at least two adjacently positioned, air-permeable vertical plates with a corrugated profile. When air also is conducted out through the upper part of the cooling tower both horizontally and tangentially, it is possible to use vertically installed separator devices for separating air and the droplets contained therein, in which devices the return circulation of the liquid flows in perpendicular to the exhaust air flow, which increases the gas velocity and improves the cooling efficiency. Droplet separator devices that are arranged vertically with respect to the cooling tower are more effective than horizontally arranged separator devices. By using a cooling equipment according to the invention, the size of the cooling tower is remarkably reduced, while the cooling efficiency is, however, increased. This brings forth advantageous savings in the material expenses of the cooling tower. In addition, the cooling arrangement according to the invention makes the maintenance operations of the liquid feed equipment and exhaust air discharge equipment easier because of the practical positions thereof. According to an advantageous embodiment of the invention, the ratio of the height of the outlet aperture and the height of the cooling tower in the vertical direction is 1:5, in which case an optimal cooling efficiency is achieved. The invention is described in more detail with reference to the appended drawings, where Figure 1 illustrates a cooling equipment according to the invention Figure 2 shows a cooling equipment according to the invention, seen in a cross- section of the embodiment illustrated in figure 1 Figure 3 illustrates a cooling equipment according to the invention Figure 1 illustrates a cooling equipment 1 according to the invention for cooling liquid, such as electrolyte. Figure 2 shows a cross-section of the embodiment of figure 1, seen from the direction A. Figure 3 illustrates a cooling equipment according to the invention, seen as three-dimensional. The cooling equipment 1 comprises a cooling tower 2 with a mainly cylindrical cross-section in the vertical direction, provided with an outer surface i.e. wall 3, an upper part 4 and a bottom part 5 of the cooling tower, which together define the cooling space 6. Most advantageously the shape of the cooling tower 2 is a cylinder in the vertical direction, but it may also have a shape where the cross-section becomes wider in the upper part 4, in which case a wider acceleration area is achieved for the air flow before it is exhausted from the cooling tower. The upper part and the bottom part are closed while the cooling is in operation. The outer surface 3 of the cooling tower is typically made of fiberglass or a corresponding material. The cooling air 7 is fed in the cooling space 6 of the cooling tower 2 horizontally with respect to the cooling tower, and in parallel with the tangent 15 of the outer surface of the cooling tower, by means of cooling air feed equipment 8, comprising at least one inlet aperture 9 arranged on the outer surface 3 of the cooling tower, and means such as a fan for feeding the cooling air further to the cooling space 6 of the cooling tower. There may also be several inlet apertures arranged at different spots of the outer surface 3. The liquid 10 to be cooled is fed by means of liquid feed equipment 11, comprising means such as for example liquid nozzles 24 for injecting the liquid 10 to be cooled to the cooling space 6. The liquid drops to be cooled, such as electrolyte drops, move in the cooling tower against the vertically upwardly proceeding air flow 20, in which case water is evaporated therefrom. In the cooling space of the cooling tower, the air flow becomes turbulent, and its velocity in the horizontal direction increases. Smaller droplets are separated from the downwardly flowing cooled drops, which droplets are conducted to the We Claim 1. Cooling equipment (1) for cooling liquid, comprising: a cooling tower (2) that is mainly cylindrical in the vertical direction, having an outer surface (3), an upper part (4) and a bottom part (5) of the cooling tower, defining the cooling space (6), cooling air feed equipment (8), comprising at least one inlet aperture (9) arranged on the outer surface (3) of the cooling tower, means for feeding cooling air to the inlet aperture and further to the cooling space of the cooling tower, liquid feed equipment (11), comprising means for feeding the liquid (10) to be cooled to the cooling space (6), exhaust air discharge equipment (12), - as well as means (13) for removing the cooled liquid, characterized in that the cooling air feed equipment (8) and the exhaust air discharge equipment (12) are arranged, with respect to the cooling tower (2), so that both the flowing direction of the cooling air (7) from the inlet aperture (9) to the cooling space (6) and the flowing direction of the exhaust air (14) from the discharge equipment (12) is horizontal and parallel to the tangent (15) of the outer surface (3) of the cooling tower and the exhaust air discharge equipment (12) includes a housing element (19), provided with at least four outlet apertures (16) arranged vertically with respect to the horizontal cross-section of the cooling tower(2). 2. Cooling equipment as claimed in claim 1, wherein the housing element (19) of the exhaust air discharge equipment (12) is provided with eight outlet apertures (16), arranged equidistantly in the housing element, so that each plane (17) parallel to the surface of the outlet aperture forms an equally large angle (B) with the tangent (15) of the outer surface of the cooling tower (2). 3. Cooling equipment as claimed in claim 1 or 2, wherein in each outlet aperture(16), there is installed in the vertical direction at least one droplet separator element (18) for separating liquid droplets from the exhaust air. 4. Cooling equipment as claimed in claim 3, wherein the droplet separator element (18) is formed of at least two adjacently installed, air-permeable vertical plates with a corrugated profile. 5. Cooling equipment as claimed in any of the preceding claims, wherein the exhaust air discharge equipment (12) is arranged in the upper part (4) of the cooling tower (2), and the cooling air feed equipment (8) is arranged in the vicinity of the bottom part (5). 6. Cooling equipment as claimed in claim 1 or 2, wherein the ratio of the height (22) of the outlet aperture (16) and the height (23) of the cooling tower in the vertical direction is advantageously 1:5. 7. Cooling equipment as claimed in claim 1, wherein the liquid feed equipment (11) comprises at least one liquid nozzle (24), installed in the upper part (4) of the cooling tower, underneath the exhaust air discharge equipment (12). 8. Method for cooling liquid in a cooling equipment (1) comprising: a cooling tower (2) that is mainly cylindrical in the vertical direction, having an outer surface (3), an upper part (4) and a bottom part (5) of the cooling tower, defining the cooling space (6), cooling air feed equipment (8), having at least one inlet aperture (9) arranged on the outer surface (3) of the cooling tower and means for feeding cooling air to the inlet aperture and further to the cooling space of the cooling tower, liquid feed equipment (11), having means for feeding the liquid (10) to be cooled to the cooling space (6), exhaust air discharge equipment (12), as well as means (13) for removing the cooled liquid wherein cooling air (7) is fed horizontally and in parallel with the tangent (15) of the outer surface of the cooling tower to the cooling space (6), where the cooling air meets the liquid (10) fed against the current, which exhaust air (14) flows out of the cooling space, so that its flowing direction is horizontal and parallel to the tangent (15) of the outer surface (3) of the cooling tower, and the exhaust air (14) is conducted to the discharge equipment (12), where it is brought to discharge through at least four outlet apertures (16) equipped with a droplet separator element (18) arranged in the vertical direction, in which case from the air, there is separated liquid, which is then circulated back to the cooling tower (2). ABSTRACT COOLING EQUIPMENT AND METHOD FOR COOLING LIQUID THERIN The invention relates to a cooling equipment (1) for cooling liquid, comprising: a cooling tower (2) that is mainly cylindrical in the vertical direction, in which case the cooling air feed equipment (8) and the exhaust air discharge equipment (12) are arranged, with respect to the cooling tower (2), so that both the cooling air flowing direction (7) from the inlet aperture (9) to the cooling space (6) and the exhaust air flowing direction (14) from the discharge equipment (12) is horizontal and parallel to the tangent (15) of the outer surface (3) of the cooling tower. The invention also relates to a method for cooling liquid.

Full Text

The present invention relates to an arrangement and method, defined in the independent
claims, for cooling a solution in a cooling tower.
When separating zinc from an electrolytic solution containing zinc ions and sulfuric acid, the
temperature of the electrolyte generally rises. Typically, for cooling solutions such as
electrolyte, or an acidic solution containing slurries or metals, there are used cooling towers
where the cooling process is based on the evaporation of liquid drops in the upwardly flowing
air from the liquid drops to be cooled. Generally the air flow is colder than the liquid flow, in
which case the downwardly flowing liquid is cooled owing to heat transfer. Consequently,
convection takes place in the cooling process, and droplets moving against the air flow are
evaporated. Heat is emitted, as the liquid is cooled in the cooling tower. In cross-section,
cooling towers are typically either hexagonal or quadrangular cylinders. The solution to be
cooled is conducted to the tower in a known fashion through the top part thereof, and the
cooling air is fed in through the side of the cooling tower. During the cooling process, droplets
containing particle material are separated from the solution. Said droplets are separated from
the gas contained by the harmful particle material in separate droplet separator devices prior
to letting the gas out. The separated liquid is conducted back to the cooling tower. During the
cooling process, the impurities are accumulated on the tower walls and floor as well as to the
droplet separator elements, which creates a need to frequent maintenance procedures.
When feeding the cooling air to the cooling tower horizontally at one spot provided in the
tower wall, problems arise mainly owing to an uneven distribution of the gas. When the gas is
conducted horizontally to the tower, it must turn 90 degrees in order to move in the vertical
direction in the cooling tower. Both this fact and the large size of the air-feeding fan with
respect to the dimensions of the tower can result in an uneven distribution of the gas in the
cooling space of the cooling tower. In addition, another problem has been how

to ensure an efficient recovery of the droplets. Conventionally, separated
droplets are collected by separator devices that are arranged horizontally
against the flow. In said devices, the droplets are gathered on the surface of
strip-like structures, and the liquid circulated by gravity is directed against the
gas flow back to the cooling tower. The higher the gas velocity, the more
effectively the droplets are separated. However, a drawback with horizontally
arranged devices for collecting and separating droplets is that the gas velocity
must be restricted, which reduces the efficiency of the cooling tower. In the
planning of cooling towers, attention must be paid to the emissions discharged
therefrom, because cooling towers are often remarkable sources of emissions
in a process, for example in zinc plants. Likewise, when evaluating the
functionality of cooling towers, attention must be paid to the maintenance
procedures of said towers. Often the towers require several maintenance
operations within a short period of time, wherefore it is important that the
maintenance is carried out rapidly and easily.
The efficiency of a cooling tower can be improved by enhancing an even
distribution of the cooling air. Conventionally the cooling air distribution in the
cooling tower has been attempted to be improved by placing an obstacle in front of the cooling air feed aperture in the vertical direction, in which case the
direction of the air flow can be turned more upwardly.
The publication CA 2271424 A1 discloses a cooling tower for cooling liquid. In
the arrangement according to said publication, there is described a multilayer
wall arrangement for a cooling tower, where the wall consists of an outer wall
and an air-permeable, flexible inner wall, in which case part of the air is injected
through pores arranged in the inner wall to the cooling space, where it meets
the liquid to be cooled. The object of this arrangement is to remove deposits
accumulated on the inner wall. However, an optimal cooling solution is not
achieved by this arrangement, owing to the pressure loss caused by the inner
wall.

The object of the present invention is to eliminate some of the drawbacks of the
prior art and to realize a new way for cooling liquid. A particular object of the
invention is to introduce a new cooling equipment and method, in which case
the cooling efficiency is increased both by feeding cooling air to the cooling space and by conducting the outwardly flowing air out of the cooling tower both
horizontally and tangentially with respect to the cooling tower. The essential
novel features of the invention are apparent from the appended claims.
Remarkable advantages are connected to the invention. The invention relates
to a cooling equipment for cooling liquid, comprising: a cooling tower that is
mainly cylindrical in the vertical direction, said cooling tower including an outer
surface, an upper part of the cooling tower and a bottom part, which together
define the cooling space; cooling air feed equipment comprising at least one
inlet aperture on the cooling tower outer surface; means for feeding cooling air
to the inlet aperture and further to the cooling space of the cooling tower; liquid
feed equipment comprising means, such as liquid nozzles, for feeding the liquid
to be cooled to the cooling space, discharge equipment for the exhaust air, as
well as means for removing the cooled liquid, in which case the cooling air feed
equipment and the exhaust air discharge equipment are arranged, with respect
to the cooling tower, so that both the flowing direction of the cooling air from the
inlet aperture to the cooling space and the flowing direction of the exhaust air
out of the discharge equipment is horizontal and parallel with the tangent of the
outer surface of the cooling tower. By means of a cooling equipment according
to the invention, an even distribution of cooling air is advantageously achieved
in the cooling zone, and the cooling process is enhanced. By feeding cooling air
to the cooling space horizontally, preferably in the vicinity of the bottom part of
the cooling tower and in parallel with the tangent of the outer surface of the
cooling tower, the component of the horizontal rotation speed of the air flow is
simultaneously raised. Thus the delay time of the cooling air in the cooling
space is increased, and consequently the cooling efficiency of the liquid
droplets flowing in the tower is improved.

According to the invention, the exhaust air discharge equipment comprises a
housing element including at least four, preferably eight, outlet apertures
arranged vertically with respect to the horizontal cross-section of the cooling
tower. According to an embodiment of the invention, the outlet apertures are
placed equidistantly in the housing element, in which case each plane parallel
to the surface of the outlet aperture forms an equally large angle with the
tangent of the outer surface of the cooling tower. According to an embodiment
of the invention, in each outlet aperture, there is vertically installed at least one
droplet separator element for separating the liquid droplets from the exhaust air.
According to an embodiment of the invention, the droplet separator element is
formed of at least two adjacently positioned, air-permeable vertical plates with a
corrugated profile. When air also is conducted out through the upper part of the
cooling tower both horizontally and tangentially, it is possible to use vertically
installed separator devices for separating air and the droplets contained therein,
in which devices the return circulation of the liquid flows in perpendicular to the
exhaust air flow, which increases the gas velocity and improves the cooling
efficiency. Droplet separator devices that are arranged vertically with respect to
the cooling tower are more effective than horizontally arranged separator
devices. By using a cooling equipment according to the invention, the size of
the cooling tower is remarkably reduced, while the cooling efficiency is,
however, increased. This brings forth advantageous savings in the material
expenses of the cooling tower. In addition, the cooling arrangement according
to the invention makes the maintenance operations of the liquid feed equipment
and exhaust air discharge equipment easier because of the practical positions
thereof. According to an advantageous embodiment of the invention, the ratio of
the height of the outlet aperture and the height of the cooling tower in the
vertical direction is 1:5, in which case an optimal cooling efficiency is achieved.
The invention is described in more detail with reference to the appended
drawings, where
Figure 1 illustrates a cooling equipment according to the invention

Figure 2 shows a cooling equipment according to the invention, seen in a cross-
section of the embodiment illustrated in figure 1
Figure 3 illustrates a cooling equipment according to the invention
Figure 1 illustrates a cooling equipment 1 according to the invention for cooling
liquid, such as electrolyte. Figure 2 shows a cross-section of the embodiment of
figure 1, seen from the direction A. Figure 3 illustrates a cooling equipment
according to the invention, seen as three-dimensional. The cooling equipment 1
comprises a cooling tower 2 with a mainly cylindrical cross-section in the
vertical direction, provided with an outer surface i.e. wall 3, an upper part 4 and
a bottom part 5 of the cooling tower, which together define the cooling space 6.
Most advantageously the shape of the cooling tower 2 is a cylinder in the
vertical direction, but it may also have a shape where the cross-section
becomes wider in the upper part 4, in which case a wider acceleration area is
achieved for the air flow before it is exhausted from the cooling tower. The
upper part and the bottom part are closed while the cooling is in operation. The
outer surface 3 of the cooling tower is typically made of fiberglass or a
corresponding material. The cooling air 7 is fed in the cooling space 6 of the
cooling tower 2 horizontally with respect to the cooling tower, and in parallel
with the tangent 15 of the outer surface of the cooling tower, by means of
cooling air feed equipment 8, comprising at least one inlet aperture 9 arranged
on the outer surface 3 of the cooling tower, and means such as a fan for feeding
the cooling air further to the cooling space 6 of the cooling tower. There may
also be several inlet apertures arranged at different spots of the outer surface 3.
The liquid 10 to be cooled is fed by means of liquid feed equipment 11,
comprising means such as for example liquid nozzles 24 for injecting the liquid
10 to be cooled to the cooling space 6. The liquid drops to be cooled, such as
electrolyte drops, move in the cooling tower against the vertically upwardly
proceeding air flow 20, in which case water is evaporated therefrom. In the
cooling space of the cooling tower, the air flow becomes turbulent, and its
velocity in the horizontal direction increases. Smaller droplets are separated
from the downwardly flowing cooled drops, which droplets are conducted to the

We Claim
1. Cooling equipment (1) for cooling liquid, comprising:
a cooling tower (2) that is mainly cylindrical in the vertical direction, having an
outer surface (3), an upper part (4) and a bottom part (5) of the cooling
tower, defining the cooling space (6),
cooling air feed equipment (8), comprising at least one inlet aperture (9)
arranged on the outer surface (3) of the cooling tower, means for
feeding cooling air to the inlet aperture and further to the cooling space
of the cooling tower,
liquid feed equipment (11), comprising means for feeding the liquid (10)
to be cooled to the cooling space (6),
exhaust air discharge equipment (12),
- as well as means (13) for removing the cooled liquid,
characterized in that the cooling air feed equipment (8) and the
exhaust air discharge equipment (12) are arranged, with respect to
the cooling tower (2), so that both the flowing direction of the
cooling air (7) from the inlet aperture (9) to the cooling space (6)
and the flowing direction of the exhaust air (14) from the discharge
equipment (12) is horizontal and parallel to the tangent (15) of the
outer surface (3) of the cooling tower and the exhaust air
discharge equipment (12) includes a housing element (19),
provided with at least four outlet apertures (16) arranged vertically
with respect to the horizontal cross-section of the cooling tower(2).
2. Cooling equipment as claimed in claim 1, wherein the housing element
(19) of the exhaust air discharge equipment (12) is provided with eight outlet
apertures (16), arranged equidistantly in the housing element, so that each
plane (17) parallel to the surface of the outlet aperture forms an equally large
angle (B) with the tangent (15) of the outer surface of the cooling tower (2).
3. Cooling equipment as claimed in claim 1 or 2, wherein in each outlet
aperture(16), there is installed in the vertical direction at least one droplet

separator element (18) for separating liquid droplets from the exhaust air.
4. Cooling equipment as claimed in claim 3, wherein the droplet separator element
(18) is formed of at least two adjacently installed, air-permeable vertical plates
with a corrugated profile.
5. Cooling equipment as claimed in any of the preceding claims, wherein the
exhaust air discharge equipment (12) is arranged in the upper part (4) of the
cooling tower (2), and the cooling air feed equipment (8) is arranged in the
vicinity of the bottom part (5).
6. Cooling equipment as claimed in claim 1 or 2, wherein the ratio of the height (22)
of the outlet aperture (16) and the height (23) of the cooling tower in the vertical
direction is advantageously 1:5.
7. Cooling equipment as claimed in claim 1, wherein the liquid feed equipment
(11) comprises at least one liquid nozzle (24), installed in the upper part (4) of
the cooling tower, underneath the exhaust air discharge equipment (12).
8. Method for cooling liquid in a cooling equipment (1) comprising:
a cooling tower (2) that is mainly cylindrical in the vertical direction,
having an outer surface (3), an upper part (4) and a bottom part (5) of the
cooling tower, defining the cooling space (6),
cooling air feed equipment (8), having at least one inlet aperture (9)
arranged on the outer surface (3) of the cooling tower and means for feeding
cooling air to the inlet aperture and further to the cooling space of the cooling
tower,
liquid feed equipment (11), having means for feeding the liquid (10) to
be cooled to the cooling space (6),

exhaust air discharge equipment (12),
as well as means (13) for removing the cooled liquid wherein cooling air
(7) is fed horizontally and in parallel with the tangent (15) of the outer
surface of the cooling tower to the cooling space (6), where the cooling air
meets the liquid (10) fed against the current, which exhaust air (14) flows
out of the cooling space, so that its flowing direction is horizontal and
parallel to the tangent (15) of the outer surface (3) of the cooling tower,
and the exhaust air (14) is conducted to the discharge equipment (12),
where it is brought to discharge through at least four outlet apertures (16)
equipped with a droplet separator element (18) arranged in the vertical
direction, in which case from the air, there is separated liquid, which is
then circulated back to the cooling tower (2).

ABSTRACT

COOLING EQUIPMENT AND METHOD FOR COOLING LIQUID THERIN
The invention relates to a cooling equipment (1) for
cooling liquid, comprising: a cooling tower (2) that is
mainly cylindrical in the vertical direction, in which
case the cooling air feed equipment (8) and the
exhaust air discharge equipment (12) are arranged,
with respect to the cooling tower (2), so that both the
cooling air flowing direction (7) from the inlet aperture
(9) to the cooling space (6) and the exhaust air
flowing direction (14) from the discharge equipment
(12) is horizontal and parallel to the tangent (15) of
the outer surface (3) of the cooling tower. The
invention also relates to a method for cooling liquid.

Documents:

02999-kolnp-2008-abstract.pdf

02999-kolnp-2008-claims.pdf

02999-kolnp-2008-correspondence others.pdf

02999-kolnp-2008-description complete.pdf

02999-kolnp-2008-drawings.pdf

02999-kolnp-2008-form 1.pdf

02999-kolnp-2008-form 3.pdf

02999-kolnp-2008-form 5.pdf

02999-kolnp-2008-gpa.pdf

02999-kolnp-2008-international exm report.pdf

02999-kolnp-2008-international publication.pdf

02999-kolnp-2008-others.pdf

02999-kolnp-2008-pct priority document notification.pdf

02999-kolnp-2008-pct request form.pdf

2999-KOLNP-2008-(15-11-2011)-ABSTRACT.pdf

2999-KOLNP-2008-(15-11-2011)-CLAIMS.pdf

2999-KOLNP-2008-(15-11-2011)-CORRESPONDENCE.pdf

2999-KOLNP-2008-(15-11-2011)-DESCRIPTION (COMPLETE).pdf

2999-KOLNP-2008-(15-11-2011)-DRAWINGS.pdf

2999-KOLNP-2008-(15-11-2011)-FORM-1.pdf

2999-KOLNP-2008-(15-11-2011)-FORM-2.pdf

2999-KOLNP-2008-(15-11-2011)-OTHER PATENT DOCUMENT.pdf

2999-KOLNP-2008-(15-11-2011)-OTHERS.pdf

2999-KOLNP-2008-(21-12-2011)-CORRESPONDENCE.pdf

2999-KOLNP-2008-(21-12-2011)-ENGLISH TRANSLATION.pdf

2999-KOLNP-2008-(21-12-2011)-OTHER PATENT DOCUMENT.pdf

2999-KOLNP-2008-(21-12-2011)-OTHERS.pdf

2999-KOLNP-2008-(21-12-2011)-PCT IPER.pdf

2999-KOLNP-2008-ASSIGNMENT-1.1.pdf

2999-KOLNP-2008-ASSIGNMENT.pdf

2999-KOLNP-2008-CORRESPONDENCE-1.1.pdf

2999-KOLNP-2008-CORRESPONDENCE-1.2.pdf

2999-KOLNP-2008-EXAMINATION REPORT.pdf

2999-KOLNP-2008-FORM 18-1.1.pdf

2999-kolnp-2008-form 18.pdf

2999-KOLNP-2008-FORM 3-1.1.pdf

2999-KOLNP-2008-FORM 3-1.2.pdf

2999-KOLNP-2008-FORM 5.pdf

2999-KOLNP-2008-GPA.pdf

2999-KOLNP-2008-GRANTED-ABSTRACT.pdf

2999-KOLNP-2008-GRANTED-CLAIMS.pdf

2999-KOLNP-2008-GRANTED-DESCRIPTION (COMPLETE).pdf

2999-KOLNP-2008-GRANTED-DRAWINGS.pdf

2999-KOLNP-2008-GRANTED-FORM 1.pdf

2999-KOLNP-2008-GRANTED-FORM 2.pdf

2999-KOLNP-2008-GRANTED-SPECIFICATION.pdf

2999-KOLNP-2008-OTHERS.pdf

2999-KOLNP-2008-REPLY TO EXAMINATION REPORT.pdf

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Patent Number

253103

Indian Patent Application Number

2999/KOLNP/2008

PG Journal Number

26/2012

Publication Date

29-Jun-2012

Grant Date

26-Jun-2012

Date of Filing

24-Jul-2008

Name of Patentee

OUTOTEC OYJ

Applicant Address

RIIHITONTUNTIE 7, FI-02200 ESPOO

Inventors:

#	Inventor's Name	Inventor's Address
1	TUUPPA, EERO	ESPERANTOTIE 3 C, FI-02230 ESPOO
2	LEHTONEN, MARKUS	KALKERINLENKKI 11, FI-01930 LEPSAMA
3	VAARNO, JUSSI	OMENATIE 41, FI-02430 MASALA
4	HYODYNMAA, TAPIO	LEIKKIMAKI 1 A 9, FI-02400 KIRKKONUMMI

PCT International Classification Number

F28C 1/00,F28C 3/06

PCT International Application Number

PCT/FI2007/000034

PCT International Filing date

2007-02-13

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	20060176	2006-02-23	Finland