KR101507660B1 - Winterization for ice classes vessel using waste heat of vessel system - Google Patents

Abstract

The present invention relates to a ship having a polar class winterization system using ship waste heat and, more specifically, to a winterization technology of a ship when the ship sails the ice sea using ship waste heat. The ship having the polar class winterization system using the ship waste heat comprises: a turbo charger part arranged on the ship, rotating the blades of a turbo charger via an exhaust gas receiver installed in an engine using an exhaust gas discharged by the engine; an economizer generating steam using a hot exhaust gas outputted from the turbo charger part; a heat exchange circulating a thermal medium in the steam outputted from the economizer to perform heat exchange, lowering the temperature of the steam and outputting the steam to a smokestack part; and an equipment installed to provide the thermal medium supplied, and the heat-exchanged and heated by the heat exchange to prevent icing. According to the present invention, the ship having the polar class winterization system using the ship waste heat arranges the winterization system to prevent icing by reusing the hot exhaust gas; thus not requiring a generator to consume fuel.

Description

Technical Field [0001] The present invention relates to a vessel equipped with an ice-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ship having an anti-ice system using ship waste heat, and more particularly, to a technique of keeping a ship warm during an ice operation using ship waste heat.

Recently, Arctic sea area has been revealed as a large-scale resource area including 13% of world oil reserves and 30% of natural gas reserves. At the same time, Arctic sea route has been opened due to global warming, and it has been difficult to access to climate and ice environment. As interest in logistics transportation has increased, construction of icebreaking vessels for the dissemination and transportation of various offshore plants for exploration and mining of resources is increasing.

However, even ice vessels that can operate in polar regions require caution when navigating the polar waters of ice vessels due to risks in the polar region.

Risk items are as follows.

Arctic risk: Low temperature, Sea ice (Icing), Darkness, Operation, Remoteness, Environment (Fog, Snow, Wind etc)

Icing (icing) is one of the most dangerous factors in the top left of Fig. 1 due to the correlation between moisture (snow, rain, fog, sea water spray, etc.) and environmental conditions (wind, low temperature, .

Icing affects the stability of ship and changes the Draft, Trim, Resistance performance and so on. It can be applied to navigation equipments (Antenna, Radar, Window etc.) and exposed deck equipments (Life boat, anchor, valves, gangway, railing etc.) It affects the safety of the crew and the problem of ship navigation.

Therefore, this problem is recognized as an important problem in the case of an ice ship, and winterization is applied to the ship.

The cold weather technology is to reduce the risk factor (debris) in the extreme area. It is to make the health, safety and equipment operation of the crew possible. It is not a mandatory regulation, It is a matter closely related to the performance of equipments, emergency, rescue equipment in the environment.

Therefore, along with measures to secure the safety of ice vessels due to icing of superstructure in the polar environment, the equipment mounted on ice vessels should be designed to be usable even if icing occurs in the low temperature condition of the Arctic Ocean.

There are two main types of cold weather technology. Firstly, anti-icing means to prevent the icing on the radar, anchor, life boat and so on. Secondly, the icing on gangway, To be used again within a certain period of time.

The upper right part of Fig.

Recently, in case of ice class drill ship ordered from Stena, Sweden, there is a case of applying anti-freezing construction technology using deck channel and louver etc., and there is a case of ship such as railing PV valve and air vent head A low-temperature performance evaluation test for the material has been performed.

In order to prevent freezing of the ballast water, an air bubble device and a method of installing a heating coil as shown in the lower part of FIG. 1 are used.

In the US, the design service temperature (DST) for prevention of freezing of ballast water is divided into -30 ° C to -10 ° C. In order to prevent freezing of ballast water, Turbulence-inducing system or a heating system is used.

A Study on the Prevention of Ice Crisis in the Ship by the Korean Society of Naval Architects (Vol.48, No.1, pp.93-97, February 2011) Vol.48, No.6, pp.575-580, December 2011, Study on the Anti-freezing Technique of Weather Weatherm Seals for Inner Boats.

The M / E (Main Engine), which is applied to most commercial ships, is mainly a two-stroke low-speed diesel engine, which uses about 50% of the total efficiency for propulsion of the ship.

Exhaust gas and scavenge air, in particular, account for about 40% of the emitted energy and about 25% of the exhaust gas.

The waste heat temperature of the exhaust gas shows about 240 ° C to 300 ° C at the rear end after operating the T / C (Turbo charger).

In order to increase the efficiency of M / E and to comply with environmental regulations, steam is generated through the exhaust gas boiler or the economizer using the above-mentioned waste heat of the high temperature exhaust gas.

At this time, the exhaust gas temperature which is abandoned after the steam generation is lower than the M / E exhaust gas emission limit temperature of the general merchant vessel of the general merchant vessel is 160 ° C. (sulfur oxides exist in the exhaust gas component, , It is about 200 ℃ ~ 220 ℃, which may cause corrosion of equipment such as piping and boiler.

In recent years, anchor or chain has been used for the prevention of freezing, and a warming cover has been installed around lifeboats or safety equipments.

Also, electric heater is applied to deck storage, a propulsion chamber or an emergency generator room by application of a heat coil to a lifeboat davit or an entrance. The anti-freezing technology most used at present is a construction method using a hot wire as a deck The exposed equipment is prevented from freezing under low temperature condition by hot wire installation.

However, this wintering technology is dependent on most generators of ships. As a result, the capacity of generators will increase when the cold technology is applied.

In case of applying excessive cold protection technology (hot line installation, heater installation, etc.), there is a problem that the capacity of ship's generator is rapidly increased.

In addition, in the case of ships' generators, most of the fuel is burned to produce electricity. Recently, environmental regulations such as SOx and NOx, which are generated in exhaust gas, are being strengthened.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a ship equipped with an ice and ice cooling system using ship waste heat to apply the cold technology of an ice-operated ship by reusing exhaust gas without using electricity by a generator .

The turbo charger includes a turbo charger unit for rotating the blades of the turbocharger through an exhaust gas receiver mounted on the engine, An economizer for generating steam using the high temperature exhaust gas output from the turbocharger; A heat exchanger circulating a heating medium to the steam output from the economizer to perform heat exchange to lower the temperature of the steam and output the steam to the chimney unit; And a frosting equipment installed to supply the heating medium supplied by the heat exchanger and heat-exchanged to prevent icing.

The heat exchanger is composed of a cell / tube heat exchanger. The fresh water supplied from the inlet is circulated through a heat transfer tube located inside the heat exchanger, heat is exchanged by using the steam, and the generated hot water is discharged through the outlet Equipment.

The heat exchanger may further include a temperature sensor for sensing the temperature of the exhaust gas discharged from the heat exchanger, a controller for receiving a signal output from the temperature sensor and outputting a corresponding control signal, And a fresh water circulating pump for circulating external fresh water to the heat transfer pipe of the heat exchanger so as to be turned on / off so as to adjust the temperature of the discharged exhaust gas to the exhaust limit temperature or higher.

In addition, the ice storage system using the ship waste heat may include a steam supply pump operable to supply the saturated steam output from the economizer to the warming equipment, and the saturated steam output by the steam supply pump to remove moisture And a service steam supply unit having a moisture separator for outputting dry steam.

In addition, the cold weather equipment may be a cold weather apparatus including a residence near a chimney of a ship, a lifeboat, and radar equipment, and a hot source supplied from the heat exchanger and a dry steam supplied from the service steam supply unit, .

According to the present invention, a ship equipped with an anti-ice system using the ship waste heat has an effect of eliminating the need for a fuel-consuming generator by providing a winter system for preventing icing by recycling exhaust gas at a high temperature.

In addition, according to the present invention, the ship having an ice-freezing and coldening system using ship waste heat has an effect of preventing the discharge of exhaust gas subjected to environmental regulation as it does not require a generator consuming fuel, thereby being eco-friendly.

FIG. 1 is a view showing parts of a ship and a hot-wire coil in which a conventional icing and coldening technique is considered; FIG.
FIG. 2 is a view showing the structure of an ice storage system for a ship having an ice storage system using ship waste heat according to the present invention; FIG.
FIG. 3 is a schematic view of a heat exchanger and a service steam supply unit according to FIG. 2; FIG.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

Referring to FIGS. 2 to 3, the concept of the present invention is that, as described above, steam generated in a ship is generated through an exhaust gas boiler or an economizer using waste heat of the exhaust gas of a ship, Is about 200 ° C to 220 ° C, which is above the exhaust gas emission limit temperature (160 ° C).

As a result, it can be concluded that the exhaust emission limit temperature can be recovered through a heat exchanger. In this case, the application of the reheated waste heat energy to the cold weather technology of an ice ship was examined.

Fig. 2 shows the system configuration of the winter keeping technique using exhaust gas waste heat recovery.

First, steam is generated for the ship by exchanging heat with fresh water through an exhaust gas boiler or an economizer using the exhaust gas waste heat after operating the T / C at the M / E.

Next, the waste heat at the downstream end is exchanged with the fresh water through the heat exchanger to the exhaust gas discharge limit temperature of 160 ° C to generate hot water.

The hot water and the steam generated in this process were transferred to the equipment using the cold technology to prevent icing.

Especially, it can be applied to the near access (near Funnel) residence, life boat, and radar equipment.

Applying this system will reduce electric energy and heat energy required for winter technology and reduce fuel consumption by reducing the capacity of existing generators.

In addition, it will be possible to increase M / E efficiency and prepare for enforcement of various environmental regulations.

The ice water cooling system using ship waste heat according to the present invention includes a main engine 110, an economizer 140, a heat exchanger 150, a chimney unit 160, a service steam supply unit 170 and a winter equipment 180 .

The main engine 110 includes an exhaust gas receiver 120, a turbocharger unit 130, a generator, a propeller, and the like.

The first exhaust gas supply pipe 131 is connected between the turbocharger unit 130 and the economizer 140 and the second exhaust gas supply pipe 141 is connected between the economizer 140 and the heat exchanger 140. [ 150, and the third exhaust gas supply pipe 151 is connected between the heat exchanger 150 and the chimney unit 160.

A saturated steam supply pipe 142 is connected between the economizer 140 and the service steam supply unit 170 and the soft water supply pipe 152 is connected between the heat exchanger 150 and the warming equipment 180 And the steam supply pipe 171 is connected between the service steam supply unit 170 and the winter equipment 180.

The heat exchanger 150 is composed of a cell / tube heat exchanger and circulates the fresh water supplied from the inlet 150a through the heat transfer pipe 150c located inside the heat exchanger 150 and uses the steam discharged from the economizer 140 Exchanges heat to generate hot water, and supplies the generated hot water to the cold machine 180 through the outlet 150b.

The economizer 140 includes a high-pressure side evaporator and a low-pressure side evaporator, and the saturated steam generated in the low-pressure evaporator is supplied to the service steam supply unit 170. The steam generated in the high-pressure side is supplied to the heat exchanger 150 .

The heat exchanger 150 includes a temperature sensor 157 installed on the inner surface of the third exhaust gas supply pipe 151 adjacent to the exhaust gas outlet of the heat exchanger to sense the temperature of the exhaust gas discharged from the third exhaust gas supply pipe 151, A control unit 155 for receiving a signal output from the control unit 157 and outputting a control signal according to the control signal, and a control unit 155 for controlling the on / And a fresh water circulating pump 156 for circulating the exhaust gas to the heat transfer pipe 150c of the exhaust pipe 150 to adjust the temperature of the discharged exhaust gas to the exhaust limit temperature (160 ° C) uniformity.

Here, the fresh water circulating pump 156 may include a fresh water circulating pipe 156a and a fresh water tank (not shown) to perform a circulating operation.

The service steam supply unit 170 includes a steam supply pump 170a that operates to supply the saturated steam output from the economizer 140 to the evaporator 180 and the saturated steam pump 170a output by the steam supply pump 170a, And a water separator 170b for receiving steam and outputting dry steam from which moisture contained in the saturated steam is removed.

The warming equipment 180 is connected to the hot water supplied from the heat exchanger 150 to a winter device including a living quarters near the chimney 160 of the ship, a life boat, and a radar equipment The warming device using the dry steam supplied from the service steam supplying unit 170 can heat the warming device.

The turbocharger unit 130 is installed on the ship and rotates the blades of the turbocharger through the exhaust gas receiver 120 mounted on the main engine 110 with the exhaust gas discharged from the main engine 110.

The economizer 140 generates steam using the high temperature exhaust gas output from the turbocharger 130.

The heat exchanger 150 circulates the heating medium to the steam output from the economizer 140 to heat-exchange the steam to lower the temperature of the steam and output the steam to the chimney unit 160.

The warming equipment 180 may be supplied by the heat exchanger 150 and heat-exchanged to supply heated heating medium to prevent icing.

110: main engine 120: exhaust gas receiver
130: turbocharger unit 131: first exhaust gas supply pipe
140: Economizer 141: Second exhaust gas supply pipe
142: Saturated steam supply pipe 150: Heat exchanger
150a: entrance 150b: exit
150c: heat transfer pipe 151: third exhaust gas supply pipe 152: hot water supply pipe 155:
156: fresh water circulation pump 156a: fresh water circulation pipe
[0001] The present invention relates to a steam turbine, and more particularly, to a steam turbine,

Claims (5)

A turbocharger unit provided in the turbocharger and rotating the blades of the turbocharger through an exhaust gas receiver mounted on the engine;
An economizer for generating steam using the high temperature exhaust gas output from the turbocharger;
A heat exchanger circulating a heating medium to the steam output from the economizer to perform heat exchange to lower the temperature of the steam and output the steam to the chimney unit; And
And a cold weather equipment provided by the heat exchanger and installed to prevent the icing by supplying the heated heat-exchanged heat medium,
An ice-cooling system using the ship waste heat is provided with a steam supply pump operable to supply the saturated steam output from the economizer to the cold storage equipment, and a steam supply pump that receives the saturated steam output by the steam supply pump, Further comprising a service steam supply unit having a water separator for outputting the steam.
The method according to claim 1,
The heat exchanger is composed of a cell / tube heat exchanger. The fresh water supplied from the inlet is circulated through a heat transfer pipe located inside the heat exchanger, and heat is generated by heat exchange using the steam, and the generated hot water is supplied to the cold Wherein the vessel is equipped with an anti-ice system using waste heat of the ship.
3. The method of claim 2,
The heat exchanger includes a temperature sensor for sensing the temperature of the exhaust gas discharged from the heat exchanger, a controller for receiving a signal output from the temperature sensor and outputting a control signal according to the signal, And a fresh water circulating pump for circulating external fresh water to the heat transfer pipe of the heat exchanger so as to adjust the temperature of the exhaust gas to be discharged to the exhaust limit temperature or higher. A ship.
delete The method according to claim 1,
The cold weather equipment is heated by the hot water supplied from the heat exchanger and the hot steam supplied from the service steam supply unit to the cold storage device including residence around the chimney of the ship, lifeboat, radar equipment, Wherein the vessel is equipped with an anti-ice system using waste heat of the ship.

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