BRPI0914617B1 - marine box cooler comprising an integrated anti-fouling system - Google Patents

Abstract

marine box cooler with an integrated antifouling system marine box cooler on ships and offshore platforms with an integrated antifouling system to exterminate barnacles, shellfish, and other fouling organisms through an overheating process that can be repeated regularly. the aim of the invention is to design a marine box cooler so that a simple device can automatically protect the marine box cooler (16) against the encrustation of microorganisms in the actual cooling mode and during a stop continuously overheating a defined number of heat exchanger tubes (20) without interrupting the cooling process, if possible using the cooling water discharge heat. the objective is achieved by arranging the heat exchanger tubes in a circular fashion in special sections of the marine box cooler (16) such that hot water is supplied to the individual circular segments of the tube bundle during or outside the cooling process by by means of a mechanical device. the thermal antifouling system device (13) comprises a bowl nozzle (1) which rotates in angular steps and separates the heat exchanger tubes (20) from the marine box cooler (16) from the cooling process. the invention has the advantage that the chiller design is adapted for cooling and the simultaneous anti-fouling function and that the marine box cooler comprising the integrated taser device can be protected against fouling using the water discharge heat cooling without interrupting the cooling process.

Description

Invention Patent Descriptive Report for MARINE BOX COOLER WITH AN INTEGRATED ANTI-SCALING SYSTEM.

[001] The present invention relates to a marine box cooler on ships and offshore platforms in which barnacles, shellfish, and other fouling organisms are exterminated by means of an integrated anti-fouling system due to overheating which can be regularly repeated .

PREVIOUS TECHNIQUE [002] Fouling in ships, parts of ships and in pipe systems as well as in their components has increased rapidly not least because of increased water pollution. Internationally, it is attempted to reduce and prevent this fouling, respectively, through various methods.

[003] A method and device are described in DE-PS

19921433 C1 which is based on the objective of developing an effective and environmentally friendly procedure and device for anti-fouling and the prevention of fouling on the piping, filters, heat exchangers, connections, pumps, marine box coolers which are randomly or continuously in contact with seawater in marine boxes, for ships, offshore platforms, etc.

[004] The procedure is characterized by the fact that the seawater inside the marine box is protected by an environmental bulkhead and the marine box cooler is removed from the cooling circuit, the marine box cooler is used for reheating. locally restricted and regularly repeatable short-term use of seawater confined by a mechanical exchange of the high temperature circuit for the marine box cooler to be protected.

[005] The device to perform the procedure consists of

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2/8 that the individual marine housings of a seawater system and the piping and channels that connect them as well as the components built into the seawater system such as marine box coolers, pumps and connections comprise subsystems separated so that a short-term and locally restricted regular overheating of the confined seawater is performed, and as a result the entire seawater system is being protected in incrustation sections. Another aspect is that the subsystems are subdivided into an active subsystem and a passive subsystem. Then, during operation at sea the plug in the active marine box is opened and the closing connection is closed, and the passive subsystem is in cleaning mode having a closed plug so that the components in the passive marine box will be overheated in a mode. locally restricted, short term and regularly repeatable.

[006] The disadvantages of this invention are that modifications to the structure of the ship are required such as because of the necessary installation of a flap to close the clearance clearances of the marine box. Any service efforts on the seals are often possible only at the docks and could result in interruptions in the ship's operation not being scheduled.

[007] DE-PS 102005029988 B3 shows a device, the object of which is to protect the heat transfer medium from encrustation durably and effectively without interrupting the operation of the heat exchanger.

[008] This problem is to be solved in heat exchangers which consist of a plurality of unique heat exchangers in which the fluid of at least one single heat exchanger is separated from the actual cooling circuit by mobile funnels being positioned above the inlet and return openings for single heat exchangers. This fluid is charged into the circuit separated by

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3/8 through a pump, it flows through the heat source and is brought there to a higher temperature level. Then, the heated fluid recirculates the single heat exchanger separate from the cooling circuit. After the heating cycle is complete, the hoppers are positioned sealingly above another single heat exchanger so that the stroke is being repeated for all single heat exchangers.

[009] The disadvantage of the device is that the inlet and outlet funnels in various chambers of the chiller cover need to be mechanically connected with each other in order to allow the inlet funnels to be positioned above the inlet, and in a way to allow the outlet funnels to be positioned above the outlet of the same single heat exchanger in order to release them from the cooling circuit and thus protect them from fouling in a separate heating cycle. The engineering effort for mechanically coupling the two funnels to one another appears to be very expensive and susceptible to failure. In addition, the device described in DE-PS 102005029988 B3 employs a separate electrical heating unit for heating which results in an additional energy demand of up to 60 kW being estimated and thus must be absolutely prevented for reasons of sustainability and environmental protection.

DESCRIPTION OF THE INVENTION [0010] It is an objective of the invention to design a marine box cooler against fouling caused by microorganisms such as barnacles, shellfish, algae, etc., already in its construction method so that if possible a simple device It is capable of protecting the marine box cooler in a fully automatic mode by continuously overheating a number of tube registers both during the actual cooling mode and at standstill. This should run without any system separation.

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4/8 [0011] The required heating energy must be decoupled in an energy efficient mode from the hot high temperature circuit of the main engine or the auxiliary diesel engine, for example.

[0012] According to the invention the objective was solved according to the characteristics of the embodiments.

[0013] In marine box coolers comprising an integrated thermal antifouling system called TAS below, due to the new design of the tube bundle, an almost circular or square arrangement of the heat exchanger tubes 20 has been developed including special sections which allow single circle segments of the tube bundle of the marine box cooler to be charged by means of hot water through a mechanical TAS device during or outside the cooling mode. As an example, the TAS device comprises a nozzle 1 that rotates in angular steps which follow an almost circular arrangement of the heat exchanger tubes 20 on the tube plate 14 so that the encrustation organisms in the respective section are exterminated due to exposure heated water from single heat exchanger tubes 20 or sections of the marine box cooler on the outer tube wall and / or in the immediate vicinity of the tube bundle.

[0014] Then, possibly, the cooling surface of the marine box cooler should increase correspondingly allowing the heat additionally introduced into the system to be dissipated, preferably from the circulation of hot engine cooling water (MEHAT). However, this can become more than compensated for by reducing the scale margin due to the very clean coolers in most cases.

[0015] The advantages of the invention are that the protection of encrustation of the marine box cooler comprising the integrated TAS is possible during the operation operation at sea and

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5/8 without having to turn off the box cooler. For longer downtime, fouling protection can be performed during port operation via a separate preheater in the TAS circuit so that the auxiliary capacitor or the overproduction capacitor as well. An additional positive side effect is that during port operation the low temperature ME-LT circuit can be preheated through the device thus keeping the main motor in working condition at any time. As a result, the conventional preheating unit can be abandoned which saves the cost of current energy and the cost of acquisition. BRIEF DESCRIPTION OF THE FIGURES [0016] The invention will be explained in more detail based on a modality in which:

[0017] figure 1a shows a marine box cooler that comprises the TAS 13 device for encrust protection;

[0018] figure 1b is a top view of the tube plate 14 having circular segments 15;

[0019] figure 1c is a top view of the tube plate 14;

[0020] figure 2 shows a heated water path with nozzle 1 lowered;

[0021] figure 3 is a side sectional view of the TAS device with the nozzle 1 lowered;

[0022] figure 4 shows the TAS device 13 with the nozzle 1 raised;

[0023] figure 5 shows a figure of the displacement of the

TAS 1 in the TAS operation;

[0024] figure 6 shows a flow chart of a marine box cooler that comprises an integrated TAS.

IMPLEMENTATION OF THE INVENTION [0025] Figure 1a shows the marine box cooler 16 with the

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6/8 its main components such as the tube bundle 9, the cover 12 and the integrated TAS device 13. The engine cooling water enters through the inlet part 2 in the chamber of the marine box cooler 16 which is being formed by the cover 12 and the tube plate 14.

[0026] Figure 1b and figure 1c show the design of the tube plate 14 with the circular arrangement of the U-shaped tubes and the central tube plate area of the nozzle chamber 21 (of figure 1a) over which the TAS 1 nozzle (from figure 1a) above the TAS device 13 (from figure 1a) works in a specific way in order to protect the heat exchanger tubes 20 (from figure 1a) against fouling.

[0027] As shown in figure 2, the heated water flows through the water inlet of TAS 8 which has its check valve 10, through the rotary passage 6 to the nozzle of TAS 1 in the direction of a small number of water pipes. heat exchanger 20 of the tube bundle 9 to heat them. The rotary passage 6 seals the TAS device 13 in the marine box cover 12 to the outside and simultaneously transfers the TAS water additionally to the TAS nozzle 1 allowing the rotational and axial movements of the TAS nozzle 1.

[0028] Figure 3 and figure 4 are seen in section through the cover 12 which shows the TAS 1 nozzle in a lowered and an raised position. These (figures) describe the integrated TAS device 13 according to the invention with the lifting unit 4 (shown in figure 2) which forces against the axis of the rotating passage 6 and provides the lifting of the TAS nozzle 1, which keeps the TAS 1 nozzle in an elevated position during rotation to the next position, then lowers the TAS 1 nozzle after reaching the next position and ensures that the TAS 1 nozzle is forced against the tube plate 14 in order to heat the next circular segment of heat exchanger tubes 20. According to the implementation, the act

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7/8 rotary fan 5 transfers the torque to the axis of the rotary passage 6 by means of a belt 7.

[0029] Figure 5 shows the circular arrangement of the heat exchanger tubes 20. The TAS 1 nozzle rotates in angled steps following the almost circular arrangement of the heat exchanger tubes 20 on the tube plate 14 and thus provides special sections separating them because of this from the actual cooling water. The TAS nozzle 1 pressurizes the circular bulkhead segment of the tube bundle 9 of heat exchanger tubes 20 with hot water. With six-fold or multi-stream marine box coolers 16 a separate TAS 13 device is installed inside each nozzle chamber 21, however, at least in each second nozzle chamber 21. The TAS 1 nozzle can also be implemented either radially as shown in figure 5 or over the entire diameter or in a circular segment shape mode.

[0030] Figure 6 shows the fundamental arrangement of the components in the low temperature circuit of the engine cooling water (ME-LT) in order to heat a partial flow of this engine cooling water and enter the marine box cooler 16 through from the water inlet of TAS 8 which has its check valve 10. The water is heated by means of the temperature control valve 19 to a temperature level of at least 75 ° C. Valves 22 and 23 are opened in a temperature dependent mode by means of a control system. The TAS 1 nozzle is lowered first, and the water being heated flows into the bulkhead section through the TAS 1 nozzle thus heating this section. The course of an entire TAS cycle is carried out in angular steps, namely, until the nozzle has performed a complete circular motion of at least 360 °. LIST OF REFERENCE NUMBERS

TAS nozzle

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8/8

Cooling water inlet piece Cooling water inlet piece Lifting unit

Rotary nozzle actuator

Rotating passage

belt

Heated water

Tube bundle

Retention valve

Temperature sensor

Cooler cover

TAS device

Pipe Plate

Circular segment

Marine box cooler

TAS circulation pump

TAS heat exchanger

TAS temperature control valve

Heat exchanger tubes

Nozzle chamber

TAS water valve outlet

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Claims (13)

1. Marine box cooler with an integrated anti-fouling system to exterminate barnacles, shellfish, and other fouling organisms through regularly repeatable overheating, - the marine box cooler consists of a bundle of tubes (9) with heat exchanger tubes (20), which are arranged so that at least a partial, almost circular or square surface of the tube plate (14) is created, and - the anti-fouling system consists of a so-called thermal anti-fouling device (TAS) (13), characterized by the fact that the almost circular or square partial surface of the tube plate (14) is formed through the arrangement of outlet openings of the heat exchanger tubes (20) of a first chiller half and of the inlet openings of the heat exchanger tubes (20) of a second chiller half of two cooling circuits connected in series which are located one next to each other, the TAS device (13) is a rotating device and is provided with a TAS nozzle (1) in a nozzle chamber (21), and by the assembly of the TAS nozzle (1), a single circular segment (15) consisting of a plurality of heat exchanger tubes (20) of the tube bundle (9) is covered, so that the heat exchanger tubes (20) are environmentally sealed and with bulkheads protected against the sea water that caused the fouling r medium of heated water being separately supplied during or out of the normal cooling mode, and through an additional rotation of the TAS device (13), a respective new circular segment (15) of heat exchanger tubes (20) is covered. Petition 870190089957, of 9/11/2019, p. 12/19 2/4 2. Marine box cooler with an integrated anti-fouling system according to claim 1, characterized by the fact that the heat exchanger tubes (20) have a structured surface, because of which an improved heat transfer as well as a resistance increased deposits against fouling are achieved. 3. Marine box cooler with an integrated anti-fouling system according to claim 1 or 2, characterized by the fact that a rotating passage (6) as part of the TAS device (13) seals the water chamber within the cover of chiller (12) to the outside. 4. Marine box cooler with an integrated anti-fouling system according to claim 3, characterized by the fact that in the rotating passage (6) inside the water chamber, a TAS nozzle (1) is mounted and its external shape being a copy of one or several circular segments (15). 5. Marine box cooler with an integrated anti-fouling system according to any one of claims 1 to 4, characterized by the fact that a lifting unit (4) is additionally mounted, which lifts the TAS nozzle (1) before each additional rotation of the TAS device (13) and lowers it again after the additional rotation, and selectively forces the TAS device (13) against the tube plate (14). 6. Marine box cooler with an integrated anti-fouling system according to any of claims 1 to 5, characterized by the fact that raising, lowering and forcing the TAS device (13) against the tube plate (14) occurs hydraulically by by means of a piston integrated in the TAS nozzle (1) according to the telescopic principle. 7. Marine box cooler with an anti system Petition 870190089957, of 9/11/2019, p. 13/19 3/4 integrated inlay according to any one of claims 1 to 6, characterized in that the rotational speed of the TAS nozzle (1) of the TAS device (13) is specifically adapted by means of a reducing motor. 8. Marine box cooler with an integrated anti-fouling system according to any of claims 1 to 7, characterized in that the rotation of the TAS device (13) is carried out by means of a water turbine which is mounted inside of the water flow. 9. Marine box cooler with an integrated anti-fouling system according to any of claims 1 to 8, characterized by the fact that several said TAS devices (13) are assembled and operated individually in time or at the same time each by one own or common drive (10). 10. Marine box cooler with an integrated anti-fouling system according to any one of claims 1 to 9, characterized in that the TAS device (13) is manufactured from a specific friction reduction material. 11. Marine box cooler with an integrated anti-fouling system according to any of claims 1 to 10, characterized by the fact that a local short-term overheat is performed in a self-regulating and regular mode as well as being automatically supervised by means of integrated measurement and control systems. 12. Marine box cooler with an integrated anti-fouling system according to any of claims 1 to 11, characterized by the fact that in six-fold and multiple flow marine box coolers (16) one of the separate TAS devices (13) is arranged within each nozzle chamber (21), at least within each second nozzle chamber (21). Petition 870190089957, of 9/11/2019, p. 14/19 4/4 13. Marine box cooler with an integrated anti-fouling system according to any one of claims 1 to 12, characterized in that the TAS nozzle (1) is configured as a single radial circular segment (15), a circular segment ( 15) across the entire diameter or in another form of circular segment.