EP2034266A2 - Heat exchange device with angled or perpendicular surfaces and with cleaning - Google Patents

Abstract

The system has a nozzle holder carrier arranged along a longitudinal direction of a set of cooling tubes, where the nozzle holder carrier overlaps the cooling tubes or a cooling battery. A carriage is displaceable on the cooling tubes or the cooling battery, where the carriage carries a nozzle holder with a set of nozzles i.e. fan nozzles. The cooling tubes are subjected with a cleaning fluid from the nozzles. A cleaning device (31) is controllable from an upper end and/or is remotely controllable by mobile control lines or by a radio.

Description

The invention relates to a heat exchanger system, in particular air conditioning system, with inclined or vertical surfaces and with cleaning.

Air condensation plants (Lukos) are used as a closed system for condensing the exhaust steam or the excess steam of turbine plants. The total cooling surface is designed for the amount of steam produced. It is assumed that a certain heat transfer from the cooling surface into the ambient air. The heat transfer, however, does not remain constant. On the cooling surfaces it comes to the outside for pollution. Pollution is caused, inter alia, by pollen, leaves, industrial emissions, flue dust and leads to deposits on the cooling surfaces. As a result, the heat transfer deteriorates.

Initially occurring impurities can be compensated by possibly existing speed reserves of the fans. This already has the disadvantage of higher energy consumption for operating the system.
Further pollution can not be compensated. It leads to a reduction of the heat transfer and thus to a reduced cooling capacity for the steam condensation.

As a result of the decreasing cooling effect, the vapor pressure in the exhaust steam line increases. The turbine loses power. The power generation of the generator is reduced. Usually, the systems react to this. Are e.g. Turbines are designed for a Abdampfdruck of 0.2 bar absolute, they are e.g. switched off at a rise in the vapor pressure to O, 8 bar by monitoring devices.

With water coolers and product coolers, as they are preferably in the chemical industry, find the same problems. Again, a decrease in the heat transfer initially be compensated by existing air volume reserves.

Thereafter, however, there is a steady increase in temperature in the water cycle or product flow. This will lead to a malfunction in the foreseeable future.

The above relationships are well known to the operators.
It is obvious that the contamination of the cooling surfaces is counteracted by cleaning.

In the past, cleaning was done essentially manually. The cleaning work was usually transferred to the cleaning crews, which are also subject to other cleaning work. There is a tendency to award this work as a complete package. For all cleaning companies, however, only manual steam jet equipment or high pressure water jet equipment was available. The success of working with a handheld device is low. It is rinsed off only the loose-fitting dirt. In addition, the cooling surfaces are arranged in multiple layers or consist of fin coolers with very high ribs. In multi-layered cooling tubes causes an improper procedure or the use of inappropriate equipment only a loosening of dirt on the upper layer and attaching to lower rows / layers. Cooling surfaces with high ribs are at the same risk. On the way, the cooling air can even be blocked from passing through the radiator.

In addition, it has been shown on coolers with aluminum cooling fins that can be easily caused by the high pressure equipment damage to the ribs. Excessive pressure will bend the ribs if handled improperly. This is not immediately obvious to the operators, because the cooling surfaces are usually not regularly driven, i. to be watched. Thus, it is not possible to control when and who caused what damage and have encountered situations in which the radiator were unusable by cleaning.

An older proposal provides for a mobile cleaning device with a rotating spray arm which is moved along the cooling fins. The spray arm is mounted centrally rotatably. At each end of the spray arm is a flat jet nozzle, which is to spray the dirt from the cooling fins. A reliable cleaning of the cooling surfaces is thus not achieved, because only in a rotational position exactly across the Rib longitudinal direction an accurate penetration of the rays is achieved in the space between the cooling fins. Upon further rotation, the jet direction becomes increasingly unfavorable to a minimum cleaning effect. Thereafter, the cleaning effect is better again, until an optimum is reached, in which the rays penetrate exactly between the cooling fins.

According to an earlier proposal, the efficiency of such devices is substantially improved by using nozzles whose position relative to the cooling fins remains essentially unchanged during the rotary movement of the spray arm. In such cleaning devices, the cleaning nozzles, their position and the cleaning pressure can be adapted to the cooling surfaces. This will allow actual cleaning without the risk of damage.
Another prior proposal provides that a cleaning device for multiple cooling surfaces (cooling registers) of a system is used. This is achieved by means of a driving system. The driving system resembles a crane track, with which the device is converted from one cooling surface to the other.
However, the stationary cleaning devices and the implementable cleaning device have in common that initially a considerable investment must be made. This naturally precludes the use of such devices.

1. a) eine tragbare Reinigungsvorrichtung mit einem Fahrwagen geschaffen wird,
2. b) der mehrere Kühlrohre oder auch mehrere Kühlregister übergreift und
3. c) die Reinigungsvorrichtung eine Tragkonstruktion mit einem in Fahrrichtung des Fahrwagens verlaufenden Profil besitzt und der Fahrwagen auf dem Profil verfahrbar angeordnet ist

According to another older proposal, the above problems are met by

1. a) a portable cleaning device with a carriage is provided,
2. b) the plurality of cooling tubes or more cooling register overlaps and
3. c) the cleaning device has a support structure with a running in the direction of travel of the vehicle profile and the carriage is arranged movable on the profile

In this case, two or more profiles may be arranged side by side. However, the use of a single profile involves a special step towards an optimally lightweight and functionally reliable device. The weight advantage of a single profile is not readily apparent because several juxtaposed profiles with the same cost of material computationally have a greater bending resistance than a single profile. Nevertheless, it is not only on the larger moment of resistance. It comes too on the fact that the guide rollers do not cause deformation of the rolling surfaces. This leads to a minimum thickness of the rolling surfaces and profiles. Two minimum thickness profiles can result in more material than a single load-bearing profile.

Preferably, the profile is designed as a hollow profile, as a square profile, and length-adjustable by connectors. The extensibility facilitates working with a single device on different lugs or the like. Regardless of the profile of the extensibility and the connector are therefore also of particular importance.
The profile and the connector are favorable for a change in length. After the older proposal, the profile can be composed of several parts. The device may also have a head and a foot and between the head and foot to a length changeable profile.

The plug-in connection is brought about by means of separate spikes / pins, which engage in two pipe ends to be connected to each other. But it can also spikes / pins are attached to the pipe ends, so that engages a pipe with a mandrel / pin in the other tube.
To further weight savings, the mandrels / pins hollow or in turn be designed as tubes.
The connector may be designed self-clamping and / or designed a mechanical fuse.
Optionally, according to the older proposal at the head and foot of the device arms for different purposes, eg for supporting and / or guiding and / or holding the device and / or for holding guide rollers / wheels / discs and / or for holding drives and Be provided / or pumps.
The holders for wheels / wheels / discs can be arranged adjustable or fixed.

Optionally, the arms and / or head and / or foot may be releasably assembled from parts so that replacement in adaptation to particular needs is possible. Conveniently can be a plug connection as in the profile. This is beneficial if the arms, head and foot are made up of the same profiles.

Preferably, the drive includes a power transmission means such as a belt, chain, rope or belt, in particular a toothed belt, and a geared motor with a drive pinion. With the rollers / wheels / discs, the power transmission means is preferably passed over the head and foot and generates the necessary tension. To generate voltage, the associated roller / wheel / disc is adjustable transversely to the longitudinal direction of the power transmission means.
The power transmission means engages the carriage and is moved by means of the geared motor. In this case, the power transmission means can be guided around the drive pinion or pressed by means of another roller / wheel / disc against the drive pinion.

The use of aluminum for the profiles and a limited width of the nozzles or of the spray arm in the trolley contribute to the weight reduction.

The nozzles or the spray arm, despite limited width by moving or moving across the entire width / length of the trolley to clean all the underlying cooling tubes. The heavy weight reduction also protects the cooling coils. This is especially important for cooling coils with sensitive cooling fins. The sensitive cooling tubes / ribs include e.g. those with rectangular cross-section, between which the cooling fins are led back and forth as a meandering metal band.

In addition, the low weight brings no risk of excessive load on the cooling coil with it.

By overlapping several cooling registers and moving the cleaning nozzles in the trolley from one cooling register to the other, an optimal work design and working and operating time utilization is achieved.

The water supply to the cleaning device can take place via a hose line entrained. Optionally, the water is brought to the desired pressure via an intermediate pump. The pump can be attached to the device or placed separately in front of the device.

In particularly wide cooling systems with a plurality of juxtaposed registers, it is advantageous to provide in the upper part of the cooling coil and / or on the holder and / or on the building rails in or on which the device is movable, so that the cleaning device to implement on an adjacent cooling coil no longer needs to be solved, but can be moved.
The rails are particularly advantageous for tilted cooling registers.

For the movement of the cleaning device usually a drive is provided.
The drive consists of a motor and a gearbox.
In inclined arrangement of the cleaning device, the motor is provided at the lower end of the device. This is to give the cleaning device a low center of gravity, which gives the construction security against tipping and facilitates the supply of drive energy and water for cleaning from the ground.
This has proven itself, however, the invention has the task of improving the cleaning device. According to the understanding of the invention, cooling coils with a slope of at least 40 degrees are greatly inclined.

According to the invention, this is achieved with strongly inclined or even vertically arranged cleaning devices in that the cleaning device is controllable from the upper end of the device and / or remotely controllable. For the control of the upper end of a movable control device is provided above the movable cleaning device, preferably in the form of a working platform.
This is based on the finding that, especially in the case of a strongly inclined cooling register or a steeply inclined cleaning device, a considerable load is caused by water spray at the lower end of the cleaning device. The spray water can affect the view, resulting in insufficient cleaning. As a result of insufficient cleaning, the heat transfer in the cleaning interval is worse or the cleaning interval is shortened when the heat transfer is controlled. This increases the cleaning costs. But also an excessive cleaning is uneconomical.
Incidentally, it is difficult to accurately control the function of the nozzles through the spray. In most cases, the function of the nozzles on the appearance of the jet can be controlled.

By a working platform above the traveling cleaning device and / or by a remote control, the operator can set up outside of the spray and at the same time close to the cleaning device to control the cleaning operation and / or cleaning performance and / or the nozzle operation to control.
Above the cleaning device means according to the invention: above the cleaning surface.

In the normal control of a control panel, the control pulses for the actuation of the driving drives of the cleaning device as well as for the actuation of the pump via control lines to the drive motors or to the pumps are passed. Usually, a control panel is provided for this purpose. The control panel is fixed. The cables are permanently laid. Usually, the control pulses are transmitted electrically. In some companies, however, flammable substances / gases also occur in the area of the cleaning device. Then an explosion protection on the controller is provided if you want to be held on electrical lines. In the case of hydraulic control or control with nonflammable gases such as, for example, carbon dioxide, the cleaning device does not pose an explosion risk. However, electrical cables require special insulation in such an atmosphere.

Optionally, however, a mobile control panel is provided. The mobile control panel can be achieved by using a correspondingly flexible control line or without line by radio transmission of the control pulses.

The control panel has at least on-off switch. Preferably, control switches are also provided for reversing the direction of movement and for two or more different speeds of movement. Preferably, control switches are provided for two or more pump pressures. Thus, the movement speed of the cleaning device and the pressure of the cleaning liquid can be optimized.

The work platform can be attached to the heat exchanger or to the cleaning device or be formed by the housing of the heat exchanger or by the working platform. Preferably, the work platform is attached to the heat exchanger or the working platform is formed by the heat exchanger.

Particularly suitable is the construction according to the invention for Lukos with vertical cooling registers and attached fan. Such Lukos are also known as Hexacool Air Cooled Condenser. The term "hexa" indicates a hexagonal construction. The Lukos have straight-sided register, which joined together to form a hexagonal radiator construction. The radiator construction is similar to a pot. The cooling registers form the wall of this construction. The air is drawn from the fan through the registers into the cavity of the structure and expelled upwardly from the fan or sucked in from above and blown out of the interior through the registers. At the bottom of the Luko is provided a common hot steam supply. At the top, the registers open into a common collector. The fan sits like a lid on the construction. The construction is simple and stable. The construction can be mounted easily, quickly and safely. This leads to considerable cost advantages. It has been shown that these Lukus can get up directly on the ground and not need to be raised like other Lukos. This results in a lower height with less sensitivity to attacking wind loads and a lower environmental impact. Furthermore, the lower height facilitates access for maintenance and repair work.

Another advantage of this hexagonal Lukos is the connection of several Lukos. The result is a space-saving and extremely stable overall construction.
For a connection of several Lukos same Lukos are used and the connection is made on one of the sides, so that the Lukos form a common side at the junction. On the common side each Luko lacks the cooling coil so that the interconnected lukos form a common lumen and a common larger luko. In the common Luko results in a number of fans, which is equal to the number of Lukos, which form the common Luko. This will be referred to as connected construction.
In this connected construction, the individual Lukos modules can form.
It can also Lukos with the same function (hereinafter referred to as Luko) as the connected construction can be made of the connected construction, for example by a common support structure for the cooling coil and / or a common superheated steam supply or by a common collector and / or by a common panel in the fan and / or by a common panel in the area of the collector and / or by a common platform on the panel and / or by common cooling registers and / or by a common cleaning device and / or by common other parts.

Preferably, a support structure for the common construction is provided, which consists of columns and trusses, wherein each two adjacent columns are connected by an upper and a lower crossbar, so that the adjacent columns and connecting them trusses form a field to which a cooling register vorgebaut can be. As far as the columns and trusses are intended for a single Luko, there are six cooling registers for a Luko.
As far as the columns and trusses are intended for a common Luko or a comparable Luko, a cooling register is prefitted only on the outer fields. The inner fields remain free. In this construction, on the long sides of the joint Lukos and similar Lukos, zigzag-shaped cooling walls are created.

In the case of the use of common cleaning devices on joint Lukos and similar Lukos the tracks for the cleaning devices are modeled on the zig-zag course of the cooling walls. At the same time the kinks of the road are rounded, the radius of the rounding allows the procedure of the cleaning device along the rounding.
The zigzag-shaped running track of the cleaning device is independent of the question of the location of the controlling cleaning personnel for other common Lukos or similar Lukos advantage.

Preferably, the common Lukos as well as the comparable Lukos are provided at the bottom with a common hot steam supply and above with a common collector and the rest (bottom and top) with a common panel. Preferably, a common platform is provided on top of the panel.

The work platform preferably follows the course of the cooling registers on the common Luko or comparable Luko.

Depending on the length of the cleaning device may result that the cleaning device projects beyond the cooling register down and / or up and / or on the side by some. When the work platform is formed by the heat exchanger or by its housing, a situation may arise, in which the working platform is arranged behind the part of the cleaning device, which projects beyond the heat exchanger.
In the above-described embodiment of a cleaning device with a carriage, which is moved on one or more rails, the above situation arises if the length of the rails is not exactly adapted to the dimension of the cooling register. In the case or basically, the cleaning device is provided with a control which reverses the cleaning movement when the end of the cooling register is reached.
During the cleaning movement, a nozzle is moved in the longitudinal direction of the cooling tubes in the cooling register. The reversal can be effected by a stop control.

Each drive has a control, which in the simplest case is an on / off control. Preferably, the control is always within the reach of the operators. In this sense, either the control console in the area of the work platform and / or a remote control is provided, which allows control from any location.

It can also be advantageous to shift the drive on the cleaning device to the height of the working platform. Although there are only a few moving parts on the cleaning device, nevertheless, the drive can also show a fault. Then it is advantageous if the drive is located near the platform and there controllable by the operator and / or accessible for maintenance and repair.

Preferably, the cleaning device remains at least partially on the Luko and a portable control and / or a portable pump and / or a portable engine and / or gear and / or nozzle is provided. As a result, the essential parts for the cleaning function may be degraded and stored, or removed after cleaning for use on other lures.
In this case, in particular in plants with fire hazard, air motors or liquid motors, in particular hydraulic motors, can be used.
Preferably, the terminals of the lines are at least partially, preferably provided with a total of snap closures to shorten the assembly times.

The mobile cleaning devices described above preferably consist of a supporting and transport-friendly light profile, which is supported on portal-shaped bracket on the cooling register to be cleaned and forms the roadway for the movable nozzle, which does the cleaning work with the cleaning nozzles.

The cleaning device can be raised and moved by hand for each cooling tube or for each cooling tube group. Then driving profiles for the cleaning device are unnecessary.
However, the cleaning device can also be moved with sufficiently wide rollers or wheels over inclined cooling tubes to effect an implementation. Likewise, with the wide rollers, driving profiles on the cooling register are dispensable.

Preferably, however, driving profiles are provided on the inclined cooling registers and / or on the vertically extending cooling registers. The driving profiles are either U-profiles or C-profiles or G-profiles, in the recesses of which the cleaning device engages with suitable rollers or sliding devices.
The addressed profiles have in cross-section a U-shape or C-shape or G-shape. With a suitable position of the profiles, the profiles allow the rolling in the profiles rolling or sliding in the profiles sliders the desired stop in the horizontal or vertical direction.
Alternatively, such profiles can be used as driving profiles, which are wholly or partially umfaβt of the cleaning device with its rollers or with their sliders. Preferably, the driving profiles are attached to the frame of the cooling registers, in which the cooling tubes are held. Optionally, the profiles may also be part of the frames on the cooling registers.
Alternatively, an attachment of the driving profiles on other parts of the cooling systems into consideration. As far as the cooling systems are provided at the lower andlor upper end of the cooling registers with a stage, the respective lower driving profile can be attached to the lower stage and / or the upper driving profile on the upper stage or be part thereof.
It can also be chosen a different fasteners.
The above fastening variants include direct attachment as well as attachment via spacers such as supports and struts, also in the form of a grid construction.

The driving profiles can also be attached to the superheated steam supply and / or to the collector of the cooling system. As far as the upper driving profile not only receives horizontal forces but also vertical forces, the lower driving profile can be limited to horizontal forces. The same applies vice versa.
In common Lukos or similar Lukos the driving profiles can be guided along the Lukosurfaces and form the driving profiles preferably a continuous, uninterrupted roadway.

The above fixings can be permanent as well as detachable.

The cleaning devices described above have a carriageway for the movable nozzle floor trolley, which spans the cooling register and carries the nozzles for cleaning the cooling tubes. The roadway is formed by the older proposals by a hollow profile / driving profile.

In particular, with larger spans of the cleaning device, the lanes may be designed as a grid construction or be supported by a grid construction.

The lattice construction for the carriageway of the nozzle floor carriage may take various forms. Preferably, the grid structure consists of two or more longitudinal profiles which extend parallel to the longitudinal direction of the grid structure and are spaced apart from each other and connected by struts

The grid construction may have two or more longitudinal profiles.
With two longitudinal profiles, a ladder-like construction is created.
In three longitudinal profiles creates a triangular construction in cross-section.
Four longitudinal profiles create a quadrangular construction.

The struts may be selected at an angle greater than or less than 90 degrees (inclined) to the longitudinal profiles or at an angle of 90 degrees (perpendicular) to the longitudinal profiles.
It can also be inclined running profiles combined with exactly vertical profiles. This may be particularly advantageous if the grid structure consists of elements which are placed in the longitudinal direction of the grid structure for extension together and to reduce the construction or for disassembly for transport from and to the cooling system are again releasable
The assembly of the lattice construction of elements also has advantages for the cleaning of inclined or vertical cooling surfaces, regardless of the question of the location of the controlling cleaning personnel, in which the grid structures described can be applied.

With the shortening and lengthening also takes place an adaptation of the device to different heights or lengths of the cooling coil. The element construction simplifies and reduces the necessary storage. Otherwise, a special device would have to be provided for each cooling system.
The vertical struts are preferably to be found at the ends of the elements for the lattice constriction, optionally also distributed at intervals over the length of the elements. The inclined struts are arranged in a combination of inclined and vertical struts between the vertical struts so that the inclined struts form knots with the vertical struts at the ends where they also contact the longitudinal profiles.

The elements preferably have a length between 1 and 5 m, more preferably between 2 and 3 meters. Optionally, fittings are also provided for adapting the grid structure to a certain length, which are otherwise unavailable with the intended element length.

Optionally, 3 longitudinal profiles are used which form a triangle, more preferably an isosceles triangle, in the cross-section of the grid construction. This opens up various possibilities for connecting the nozzle car. Optionally, the triangle has a tip of triangular cross-section on the cooling tubes and / or runs one side of the cross-section parallel to the cooling register. The nozzle floor trolley can be guided on one or more longitudinal profiles.

Optionally, two of the spaced longitudinal profiles form the roadway for the nozzle floor carriage, so that the nozzle floor carriage is easily guided on the two longitudinal profiles.
It is advantageous if the nozzle block carriage is arranged between the grid construction and the cooling register in order to be moved along the cooling tubes.
Preferably, the grid construction is arranged so that the two longitudinal profiles on which the nozzle floor carriage is guided, facing the cooling coil.

If the grid construction with four longitudinal profiles has a quadrangular cross-section, it may be advantageous, as in the above-described grid construction with three longitudinal profiles, to move the cleaning device onto two longitudinal profiles which are arranged opposite the cooling surfaces.

However, it may also be advantageous to provide one of the longitudinal profiles or a plurality of the longitudinal profiles with a special cross-section which is favorable for a method of the cleaning device.
Surprisingly, there may be additional benefits if the grid structure can be combined with a cleaning device, in particular combined with a cleaning device that is as unchanged as possible, as known for horizontal cooling registers or slightly inclined cooling registers. This known cleaning device preferably have special driving profiles for the cleaning device. The driving profiles span the cooling register in the direction of travel of the cleaning device and usually have sufficient rigidity for the resulting span. The driving profiles are held in at least two portals, so that the cleaning device can be driven on the driving profiles through the portals. The known cleaning devices can be used unchanged when they are attached with their portals to the grid construction.

On the portals can also be dispensed with according to the invention, because their function of keeping the distance from the cooling registers is taken over by the grid construction.

In this sense, the known cleaning devices can also be used without the portals. In this case, a similar connection between the driving profiles and the grid construction takes place as between the driving profiles and the portals. In the known cleaning devices, the connection is made with webs, which are welded to the driving profiles and bolted to the portals or are also welded. In the application according to the invention, the driving profiles are screwed or welded at will with a longitudinal profile or grid struts.

Optionally, however, an intermediate member between the driving profiles of the known cleaning device and the grid construction is provided. The intermediate member is then preferably also provided to receive the rollers for the belt drive or cable drive or the sprockets for a chain drive of the known cleaning device. The intermediate link is used instead of every portal. In this case, the intermediate member may consist of a folded or bent sheet metal. The intermediate member may also be formed by a separate piece of a square tube or be composed of profiles together.

Each pontic is attached to the grid construction. The attachment can be done by screwing or hooking or by clamping or in a combination of these fastening variants or in another suitable manner.

The intended for the drive belt, rope or chain is usually performed first with one end on the movable on the driving profiles part of the cleaning device. The other end is then passed through the intermediate member via the rollers and wheels to secure it to the opposite end of the displaced part of the cleaning device.

If an attachment of the driving profiles is provided without intermediate member to the grid construction, it is expedient to arrange the belonging to the drive pulleys, pulleys and sprockets in the grid construction. For this purpose, bearing blocks are suitable, which are attached to the grid construction. The associated belts, chains and ropes are guided through the grid construction, similar to the pontics.

The grid structure for the nozzle-floor carriageway on the cleaning device and / or the grid structure for securing roadways to the frame of the cooling registers or stages of the cooling systems is optionally at least partially a ladder design, so that these parts of the system or the cleaning device at least partially, preferably entirely over the Ladder design for inspection, maintenance and repair is accessible.

The lattice structure for the track of the nozzle floor carriage can also carry the drive and the pump and all other parts belonging to the cleaning device.
The hydraulic lines for the cleaning water is flexible, as far as the nozzle must be moved. Incidentally, the Hydrloleitung be fixed for the cleaning water, ie be designed as a pipeline.

In the drawing, several cleaning devices are shown.

The Fig. 1 and 2 show in accordance with the EP 1604164 B1 Page views. In the side view Fig. 1 the slope of the cooling register is shown. This results in very cramped conditions at the upper end of the cooling register, in the exemplary embodiment because of a wind wall support. As a result, the square profile 2 can not be extended so far that the cleaning device reaches with its head the upper end of the cooling register. To Fig. 1 this can be compensated by the fact that the nozzle assembly 50 in the upper position protrudes correspondingly far beyond the head of the cleaning device. Here, the nozzle is supported by a nozzle floor trolley, which runs on the profile 2.
The method beyond the head and foot is possible in the embodiment due to the portal-shaped bracket 53, with which the cleaning device is held.
The portal-shaped bracket 53, together with the edge profile 2 a trolley, which is laterally movable on the cooling registers. The wagon carries all belonging to the cleaning device components, as they are already the subject of an earlier proposal. These include in the exemplary embodiment, a toothed belt drive (instead of belt drive can also chain hoist or other drawbar be provided with tape or rope), the drive and the nozzle floor carriage 50th
For moving the nozzle floor carriage 53 driving rollers are provided at the bottom of the bracket. The castors have a detent in the form of a clamp. The profile 2 is in the Ironing 53 hung. The suspension is a strut 54. The edge profile 2 is arranged so that a diagonal of the cross section is vertical.
On the inclined surfaces of the Kantprofiles 2 run rollers 55. The rollers are mounted on metal strips 56. The metal strips are folded at the upper end so that the mounting surfaces for the rollers are at 90 degrees to each other. The same angle, the side surfaces of the Kantprofiles 2 each between them.

At the lower ends of the metal strip bolts 57 are provided. The bolts 57 at the same time form spacers for the metal strips and also fasteners for the nozzle 50th

To Fig. 3 is for fastening the nozzle assembly 50 to the nozzle floor carriage on the construction formed by the bolt 57 a screw provided. The screw connection allows quick assembly and disassembly.

Fig. 4 shows a hexagonal (hexagonal) Luko 10.
The Luko 10 has a support structure inside with supports and trusses.
There is a support at each corner. Between the corners of the columns are connected by the trusses. At the supports and trusses cooling register 11 are attached. The cooling registers 11 have vertically extending cooling tubes to which the superheated steam is supplied from below. At the top, the steam, unless it is condensed, enters a collector.
To the cooling coil 10 around a panel 12 is provided.
At the top, the Luko 10 has a fan 13.
Depending on the direction of rotation of the fan 13, the air is sucked through the cooling register 11 in the Lukomitte and ejected upwards or it is sucked in the air from above and pushed through the cooling coil 11 to the outside.

The Fig. 5 shows three interconnected lukos 10 ', 10 "and 10''' The three interconnected lukos form a common luko with two long sides and two narrow sides On the narrow sides the common luko is identical to a single luko 10.

From the long sides is an in Fig. 6 shown in plan view.

The Luko 10 'has thereby vertically extending supports 20. The vertical supports are connected to each other at the top and bottom by trusses 21. Each two adjacent columns 20 form with the associated trusses 21 a field in which a cooling register 25 is attached to the columns and trusses.
The illustrated longitudinal side is zigzag-shaped.
To the opposite longitudinal side there is a connection formed by trusses 22, which are identical to the trusses 21. The traverses 22 form with the supports 20 a common field of Lukos 10 'and 10 ", which is free of cooling registers.

On the outside of the cooling registers 25 of the illustrated side wall run driving profiles 30 for cleaning devices 31. The driving profiles 30 are circumferential

Fig. 7 shows a single view of the cleaning device.
In the view it can be seen that the cleaning device is held in two driving profiles 30.
The one driving profile 30 is attached to the common steam supply 35 for the cooling register 25.
The other driving profile 30 is attached to the common collector 36 of the cooling coil 25. Above the collector 36 is the panel 37 for the fan housing. In addition, a working platform 38 is provided.

The cleaning device 31 has a grid frame 40, which extends from the bottom of the cooler to the height of the working platform 38. The lattice framework forms two portal-shaped parts 41 and 42, the struts of which are provided on the cooling register side with rollers and engage with the rollers in the driving profiles 30.
In addition, the grid construction carries a driving profile 45, the square profile with the profile 2 after Fig. 1 is identical and is also arranged upright. The driving profile 45 is held in the same manner on the grid structure 40 as the driving profile 2 on the portal-shaped bracket 53 in Fig. 1 and 2 , In contrast to Fig. 1 and 2 is the driving profile 45 not only in the portals 41 and 42, but also held on two other struts 46 and 47. This gives the driving profile 45 extra stability.

On the driving profile 45, a nozzle floor carriage 60 is arranged to be movable as the nozzle floor carriage in Fig. 2 , That is, the nozzle floor carriage 60 surrounds the driving profile 45 with a plurality of rollers. The rollers rest against at least three profile surfaces of the driving profile 45. At least one of the profile surfaces has at least two rollers spaced apart from one another. On the way arises both in the longitudinal direction of the driving profile 45 and in the circumferential direction of the driving profile 45 a non-tilting arrangement of the nozzle floor carriage 60. The nozzle floor carriage 60 is in the Fig. 7 shown in the lowest position. The nozzle carries in the embodiment six nozzles from which emerge correspondingly many cleaning jets. A cleaning jet 62 is shown.
The upper position of the nozzle floor carriage is designated 60 '.

The nozzle floor cart 60 is moved by a toothed belt 63.
The drive 64 for the belt drive is arranged on a console at the upper end of the drive profile 45. There, the drive 64 is accessible from the working platform.
The supply of cleaning fluid is from above. There, a pipe 65 is provided, which merges to the lower end of the cleaning device in a flexible hose line.

The cleaning device is moved after performing cleaning by hand. The movement by hand is possible because the cleaning device is designed in lightweight construction and is easy due to the existing roller guide.
On the driving profiles 30, the cleaning device is moved to the next cooling register after cleaning a cooling register. Due to the corresponding curve of the driving profiles 30, the cleaning device can also be moved at the corners of the side walls. This is in Fig. 6 shown with positions 31 'and 31 ".

Fig. 8 to 10 shows a further embodiment of the invention.
In this case, a cooling system is provided with vertically extending cooling tubes. The cooling tubes are field by field, namely arranged in registers 101. The cooling registers are provided with frame 102, the entire cooling system with a frame 100th
To the cooling system include frame 100 and a non-illustrated walk-lower stage at the bottom of the system and a non-illustrated upper stage at the top of the system. On the lower stage are dash-dotted illustrated rails 112 intended. On the upper stage dash-dotted further rails 121 are provided.
On the rails 121 and 112, a cleaning device is arranged movable. To the cleaning device includes a trolley 110 with profile rollers 111, also grid elements that have been put together to a grid support 103. In the embodiment, the individual elements have a length of 2m and consist of aluminum elements, so that they can be easily handled and put together by hand. Each element consists of longitudinal profiles 104 and 125. The profiles are hollow profiles, so that bolt-like connectors can be stuck in the open ends. The connecting pieces are adapted to the inner diameter of the tubes 104 and 125 at the two ends. Adapted means that a play of movement is taken into account and the bolts can be slidably inserted into the open pipe ends. The movement play is at the same time so dimensioned that no disturbing wobbling is given.

In another embodiment, any wobbling is prevented by the tube ends are clamped with the connectors. The pipe ends are slotted so that the pipe ends can be pressed with a pipe clamp against the connectors. In the embodiment, the pipe clamps are loose, in other embodiments, the pipe clamps are connected to the pipe ends, so that the clamps can remain in place after loosening the tension and facilitates a subsequent new installation. In still other embodiments Fig. 11 the pipe ends 140 and 141 are provided on one side with a slot 142 and 143, respectively. On both sides of the slot cams 144 and 145 are welded. The cams 144 and 145 have holes 146 and 147, can be passed through the screws. Nuts are screwed and tightened on the bolts so that the slotted pipe ends 140 and 141 frictionally engage the bolts 148 and 150 of the connecting pieces 149 which project into the pipe ends.

The connectors are centrally provided with a collar, which prevents the connectors fall into hollow sections and lose their function. The collar has either exactly the outer dimensions of the tubes, so that the collar can be easily run over with the cleaning device. Same dimensions are achieved, for example, by that are cut from the raw material for the tube 104 and 125 correspondingly thin discs as rings, which are fastened to the bolt, preferably welded. Different cutting methods are possible. Preferably, the discs are sawn off.

Optionally, the collapse of the bolt can be prevented even with collars or other attacks inside the tubes.

Fig. 9 shows that the longitudinal profiles 104 are formed as round tubes, while the longitudinal profile 125 is formed as a square profile. The square profile has the same dimensions as the square sections, which alone spans the cooling tubes in the above-described cleaning devices and forms the roadway or the driving profile for the nozzle floor carriage. Advantageously, then the same nozzle floor carriage for the embodiment after Fig. 8 to 9 Find use. This has significant economic benefits.

The nozzle floor cart is then moved in the intermediate space 134 between the cooling system and the grid structure 103. In other embodiments, another nozzle floor cart moves outside of the grid structure 103 on the two tubes 104 or laterally to the Gittekonstuktion.

The profiles 104 and 105 are connected by struts 105 and 106 together to the grid elements. The struts 105 are inclined to the longitudinal profiles, while the struts 106 extend exactly transverse to the longitudinal profiles. All struts add strength to the grid construction. Partially meet in two or more struts with their ends in knot 132 or 133.

In Fig. 10 the upper stage is designated 122 and provided with a railing 123. The grid structure 103 engages over the railing 123 with an extension 131 and with a control panel 130. The control panel 130 allows the control of the cleaning device from above.

At the upper end of the grid construction, rollers of the cleaning device engage in a driving profile 121.
In addition, the cleaning device is provided with a lock for the respective cleaning plates. In the exemplary embodiment, the lock is formed by jaws, which run in the driving profiles and are braced for locking. In other embodiments, other clamping and gripping and locking systems are provided as a lock.

The Fig. 12 to 14 show another embodiment with a square cross-section grid construction 200. The grid construction consists of four longitudinal profiles, which are interconnected by struts. The grid construction is combined with a known cleaning device 201 for the tube bundle / tube register 202 of a cooling system. The nozzle 216 of the cleaning device is shown schematically.
To the cleaning device 201 includes a profile 210, the driving profile 210 is connected via webs 211 and intermediate members 212 to the grid structure 213. The attachment of the intermediate members 212 to the grid construction is carried out with tabs 213rd
In the intermediate members 212 sit pulleys 214, on which a drive belt is guided for the movement of the cleaning device. The nozzle 216 is vertically movable to clean the vertically extending cooling tubes of the cooling register 202. After cleaning, the cleaning device must be moved to clean other soiled cooling tubes. For this purpose, the grid structure 200 is moved horizontally. Both in the cleaning work as well as the horizontal method of the cleaning device with the grid construction, a guide and support of the grid structure 200 is held on a guide profile 203. The grid structure 200 engages with an adjustable boom 205, guide rollers 203 and a height adjustment 206 in the U-shaped profile.
The rollers 204 form with the boom 205 and the height adjustment 206 a carriage.

Fig. 15 shows the lower end of the grid construction with a wagon 220 and casters 221.
Fig. 16 and 17 show a grid construction 250 with cleaning device attached thereto. The cleaning device differs from the cleaning device Fig. 12 to 14 in that the driving profile 260 is connected to the grid construction 250 via webs 261 without intermediate links. The attachment takes place in the same way as after Fig. 12 to 14 ,
To the cleaning device belongs - as after Fig. 12 to 14 a belt drive with a toothed belt 252 for the vertically movable nozzle block 253. In contrast to Fig. 12 to 14 However, the timing belt is guided by the grid structure 250. For this purpose, bearing blocks 251 are arranged with pulleys in the grid structure 250.

The cooling registers to be cleaned are in Fig. 16 and 17 denoted by 270.

Unlike the Fig. 12 to 14 is after Fig. 16 and 17 also another carriage provided on the grid structure 250. In this case, the guide carriage consists of a linkage which sits centrally on the grid structure and is height-adjustable and comprises rollers 255 mounted on a cooling profile profile 256.

Claims (41)

Heat exchanger system with cleaning device for steeply inclined and even vertical cooling surfaces, especially for Lukos or the like cooling systems
and for chemical plants,
in particular with a movable in the longitudinal direction of the cooling tubes nozzle floor car, the plurality of cooling tubes or a plurality of cooling registers overlaps, wherein the carriage is displaceable or movable to other cooling tubes or cooling registers and wherein the carriage carries a nozzle with nozzles, in particular provided with flat jet nozzles, and wherein the Cooling tubes are supplied from the nozzles with cleaning liquid,
characterized in that the cleaning device is controllable from the upper end and / or remotely controllable via mobile control lines or via radio. Heat exchanger system according to claim 1, characterized in that a) that at the upper end of the cleaning device whose control is provided and / or b) that a working platform for the control of the cleaning device is provided at the upper end of the cooling register. Heat exchanger system according to claim 1 or 2, characterized in that the control and / or the drive of the cleaning device is provided in the region of the working platform at the upper end of the cleaning device. Heat exchanger system according to one of claims 1 to 3, characterized in that at least a part of the cleaning device remains on the system and that a portable control and / or a portable pump and / or a portable engine and / or transportable gear and / or a portable nozzle and / or a portable nozzle floor trolley is provided. Heat exchanger system according to one of claims 1 to 4, characterized by an air motor or a liquid motor as a drive for the cleaning device. Heat exchanger system according to one of claims 1 to 5, characterized by the use of quick-release closures in the supply lines for energy and cleaning water. Heat exchanger system according to one of claims 1 to 6, characterized in that the cleaning device spans the cooling system wholly or partly with a grid construction and / or
that the cleaning device is held in driving profiles, which are held with a grid construction on the cooling system, wherein the cleaning device is preferably horizontally movable with the grid structure. Heat exchanger system according to claim 7, characterized in that the grid construction is composed of elements, preferably with element lengths of 1 to 5m, even more preferably with a length of 2 to 3m. Heat exchanger system according to claim 8, characterized in that fittings for reaching lengths for the grid construction, which are not achievable with the provided element lengths. Heat exchanger system according to one of claims 7 to 8, characterized in that the grid construction includes at least two spaced longitudinal profiles, preferably three or more spaced longitudinal profiles which are interconnected by struts. Heat exchanger system according to claim 10, characterized in that a grid construction with three spaced and interconnected by struts longitudinal profiles which form a triangle in cross-section, which point with a tip against the cooling tubes and / or extend with a flat side parallel to the surface of the cooling register and that a nozzle floor carriage is guided on one or more longitudinal profiles. Heat exchanger stops according to claim 11, characterized in that the grid construction at the cross-sectional tip has a longitudinal profile, which is designed as a square profile and is suitable for guiding the nozzle floor carriage. Heat exchanger system according to one of claims 8 to 12, characterized by connecting pieces between the elements of the grid construction. Heat exchanger system according to claim 13, characterized by bolt-like connecting elements with a collar or a stop in the hollow sections of the grid construction Heat exchanger system according to claim 14, characterized by a collar of the same material as the associated pipe profile. Heat exchanger system according to one of claims 8 to 15, characterized by a tension of the pipe ends with the connecting pieces. Heat exchanger system according to claim 16, characterized in that the pipe ends are slotted and provided with pipe clamps. Heat exchanger system according to claim 16, characterized in that the tube ends are slotted and provided on both sides of the slots cams, which are braced against each other with screwdrivers. Heat exchanger system according to one of claims 7 to 18, characterized in that the struts are inclined or perpendicular to the longitudinal profiles. Heat exchanger system according to claim 19, characterized by a knot formation of the struts. Heat exchanger system according to one of claims 7 to 20, characterized in that the grid construction at least partially at the same time has a conductor construction. Heat exchanger system according to one of claims 1 to 21, characterized in that a conventional cleaning device is connected to the grid construction. Heat exchanger system according to claim 22, characterized in that the driving profiles are attached by means of wholly or partially existing portals to the grid construction. Heat exchanger system according to claim 22, characterized in that the driving profiles are fastened by means of intermediate links to the grid construction. Heat exchanger system according to claim 24, characterized in that the intermediate members are formed by folded or bent sheets or are composed of profiles together and / or the pulleys or pulleys or sprockets associated with the drive so that the belts or ropes or chains are passed through the intermediate links. Heat exchanger system according to claim 22, characterized by an attachment of the driving profiles via webs on the grid construction and by pulleys or pulleys or sprockets, which are arranged in the grid construction and by straps or ropes or chains which are guided through the grid structure. Heat exchanger system according to one of claims 1 to 26, characterized by driving profiles on the cooling registers for horizontal displacement of the grid construction with the cleaning device. Heat exchanger system according to one of claims 7 to 27, characterized in that the cleaning device is supported at the ends mobile on the cooling coil or a stage of the cooling system. Heat exchanger system according to claim 1 to 28, characterized in that the cleaning device is supported at least at the upper end of the roadway for the nozzle floor trolley with a portal through which the nozzle stock goods can be moved. Heat exchanger system according to one of claims 1 to 29, characterized by cooling towers with circulating driving profiles for the cleaning device, wherein on the cooling registers at least one fan is provided and the fan housing is provided a revolving platform. Heat exchanger system according to one of claims 1 to 30, characterized by angular cooling towers, preferably hexagonal cooling towers, wherein the working platform and / or the rotating running profiles at Lukos in connected construction or similar Lukos follow the course of the preferably zig-zag-shaped side walls. Heat exchanger system according to one of claims 1 to 31, characterized in that at least one driving profile to implement the cleaning device at the same time receives horizontal forces and vertical forces and that the other driving profile for implementing the cleaning device absorbs at least horizontal forces. Heat exchanger system according to claim 32, characterized by a curvature of the driving profiles in and at the corners of the cooling towers, which allows driving around the corners and in the corners. Heat exchanger system according to claim 32 or 33, characterized in that the grid construction engages with rollers in the driving profiles for converting the cleaning device. Heat exchanger system according to one of claims 7 to 34, characterized in that the driving profile for the cleaning movement of the nozzle assembly is held at more than two locations in the grid construction. Heat exchanger system according to one of claims 7 to 35, characterized in that the movable nozzle in the longitudinal direction and in the circumferential direction of the driving profile is held tilt-proof on the driving profile. A heat exchanger as claimed in any one of claims 1 to 36, characterized in that each lug is provided with a support structure composed of vertical struts and struts interconnecting the struts, two adjacent struts defining a field with the struts in which a cooling coil is attached. Heat exchanger system according to one of claims 1 to 37, characterized by a console for the drive for nozzle block movement and / or for receiving the control block at the end of the driving profile and / or the grid construction. Heat exchanger system according to one of claims 7 to 38, characterized in that in the Lukos in common construction, the common fields of two adjacent Lukos are free of cooling registers. Heat exchanger system according to one of claims 1 to 39, characterized by cleaning devices which protrude to the working platform on the fan housing. Heat exchanger system according to one of claims 7 to 40, characterized in that the grid construction has a wagon below and / or has a guide carriage at the top.

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