KR101617734B1 - Chemical tank temperature maintenance for reducing exhaust gas of engine, and vessel or ocean cosnstruction including the same - Google Patents

Abstract

A chemical tank temperature maintenance apparatus for reducing exhaust gas of an engine and a ship or an ocean structure including the same are disclosed. An apparatus for maintaining a temperature of a chemical tank for exhaust gas reduction of an engine according to an embodiment of the present invention includes: a chemical tank storing contents capable of hydrolyzing an exhaust gas; And a cold / hot water line unit disposed inside the inner wall of the chemical tank so as to indirectly transmit heat to the contents, and in which cold water or hot water is selectively supplied so that the temperature of the contents can be maintained within a predetermined range.

Description

TECHNICAL FIELD [0001] The present invention relates to a chemical tank temperature maintaining apparatus for reducing exhaust gas of an engine, and a vessel or an offshore structure including the chemical tank temperature maintaining apparatus. [0002]

TECHNICAL FIELD The present invention relates to a chemical tank temperature maintenance apparatus for reducing exhaust gas of an engine and a ship or an ocean structure including the same, and more particularly, to a chemical tank temperature maintenance apparatus for reducing exhaust gas of an engine and a ship or an offshore structure .

An engine mounted on a ship or an offshore structure is connected to an exhaust gas abatement device for reducing exhaust gas. As such an exhaust gas abatement apparatus, a chemical tank containing UREA or NaOH is used for reducing NOx and SOx generated in the exhaust gas.

Such an exhaust gas abatement apparatus is a device for hydrolyzing an exhaust gas using a chemical tank and reducing the exhaust gas to carbon dioxide, ammonia and water harmless to the environment. UREA or NaOH is mixed with exhaust gas by proper injection by electronic control Hydrolysis can be caused to reduce NOx and SOx.

Such an exhaust gas abatement device must maintain the temperature of the chemical product stored in the chemical tank in accordance with the characteristics. In other words, Urea or NaOH is recommended to maintain a certain range of temperature during storage. In order to maintain the temperature conditions of these chemicals, it is necessary to cool or heat the chemical tank depending on the ambient temperature affected by the operating area / operating conditions.

Korean Patent Application No. 10-2011-078064

An embodiment of the present invention is to provide a chemical tank temperature maintenance apparatus for reducing the exhaust gas of an engine having a high durability and maintaining a stable temperature in a chemical tank, and a ship or an offshore structure including the chemical tank temperature maintenance apparatus.

According to an aspect of the present invention, there is provided a chemical tank in which a content capable of hydrolyzing an exhaust gas is stored; And a cold / hot water line unit disposed inside the inner wall of the chemical tank to indirectly transmit heat to the contents, wherein cold / hot water is selectively supplied to maintain the temperature of the contents within a predetermined range, A chemical tank temperature maintenance apparatus for abatement may be provided.

The content is Urea or NaOH, and the predetermined range of the temperature is from 5 to 45 degrees Celsius when the concentration of Urea is 40%, and from 16 to 45 degrees Celsius when the concentration of NaOH is 50% .

The cold / hot water line unit includes an inlet pipe connected to the chemical tank and for introducing the cold water or hot water into the chemical tank; An outflow conduit through which the cold water or hot water flows out from the chemical tank; And a heat exchange module disposed outside the chemical tank for connecting the inlet pipe and the outlet pipe, the heat exchange module being arranged to exchange heat with the cold water or hot water.

The cold / hot water line unit includes: an opening / closing valve disposed in the inlet pipe and the outlet pipe, respectively; A circulation pump disposed in the outflow conduit for circulating the cold water or hot water to the heat exchange module side; And a temperature sensor disposed in the chemical tank to sense the temperature of the contents inside the chemical tank.

The heat exchange module may be supplied with power generation facilities in the ship or cooling water for air conditioning.

The chemical tank temperature holding device for exhaust gas reduction of the engine described above may further include a chemical tank temperature holding device connected to the temperature sensor for operating the open / close valve and the circulation pump based on the temperature of the contents sensed by the temperature sensor, Or shut off the power supply.

According to another aspect of the present invention, there is provided a ship or an offshore structure including a chemical tank temperature maintenance device for reducing the exhaust gas of the engine.

According to an embodiment of the present invention, it is possible to provide a chemical tank temperature maintenance apparatus for reducing the exhaust gas of an engine with high durability, which can stably maintain the temperature inside the chemical tank, and a ship or an offshore structure including the same.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a block diagram of a chemical tank temperature maintaining apparatus for reducing exhaust gas of an engine according to an embodiment of the present invention; FIG.

Various embodiments of the present invention will now be described by way of specific embodiments shown in the accompanying drawings. The differences between the embodiments of the present invention described below are to be understood as mutually exclusive. That is, the specific shapes, structures, and characteristics described may be embodied in other embodiments in accordance with one embodiment without departing from the spirit and scope of the present invention, It is to be understood that the arrangements may be altered, where like reference numerals refer to like or similar features throughout the several views, and length and area, thickness, and the like may be exaggerated for convenience.

As shown in FIG. 1, the chemical tank temperature holding apparatus for reducing the exhaust gas of an engine according to an embodiment of the present invention includes a chemical tank 100 in which contents capable of hydrolyzing exhaust gas are stored, And a cold / hot water line unit 110 which is disposed inside the inner wall of the chemical tank 100 to indirectly transmit heat and in which cold or hot water is selectively supplied so that the temperature of the contents can be maintained within a predetermined range.

In the chemical tank 100 according to the present embodiment, contents corresponding to a chemical product capable of hydrolyzing the exhaust gas into a harmless substance by chemically bonding with the exhaust gas of an engine mounted on a ship or an offshore structure are stored.

At this time, as described above, the contents stored in the chemical tank 100 should be maintained within a predetermined temperature range as described below so as to maintain the chemical characteristics at the time of bonding with the exhaust gas.

To this end, the chemical tank 100 is provided with a cold / hot water line unit 110 capable of selectively supplying cold water or hot water, and the cold / hot water line unit 110 is provided with cooling water or hot water used in a ship or an offshore structure, Can be supplied. The cold / hot water line unit 110 may be disposed on the inner wall of the chemical tank 100, such as an exhaust tube of a boiler.

For example, when a ship or an offshore structure is operated in an area at a subzero temperature, the contents of the chemical tank 100 may fall below zero. However, since the hot water heated by the boiler is used in the hull, the contents of the chemical tank 100 can be maintained in the normal operating temperature range of the image by using hot water.

In addition, the hull may have cooling water maintained at a constant temperature by heat exchange with seawater. Such cooling water is supplied to the cold / hot water line unit 110 to prevent overheating of the contents of the chemical tank 100, It can be maintained at a constant temperature within a normal operating temperature range.

The chemical tank temperature holding device for reducing the exhaust gas of the engine according to the present embodiment is characterized in that the temperature maintenance of the contents inside the chemical tank 100 is performed by the cold / hot water line unit 110 provided on the inner wall of the chemical tank 100 The cold / hot water line unit 110 indirectly transfers heat to the contents. In this case, since the influence of the leakage of the heat exchange fluid flowing through the cold / hot water line unit 110 is blocked, the contents of the chemical tank 100 can be stably maintained in temperature and durability can be assured.

According to the present embodiment, the content of the chemical tank 100 is Urea or NaOH, and the predetermined range of the temperature is 5 to 45 degrees Celsius when the concentration of Urea is 40%. When the concentration of NaOH is 50% 16 degrees to 45 degrees.

Such Urea (urea) or NaOH is a compound that can be replaced with a harmless substance by being sprayed on the flow path of the exhaust gas to hydrolyze the nitrogen or sulfur compound of the exhaust gas. The Urea Lt; RTI ID = 0.0 > chemically < / RTI >

The cold / hot water line unit 110 according to the present embodiment includes an inlet pipe 111 connected to the chemical tank 100 and for introducing cold water or hot water into the chemical tank 100, And a heat exchange module 120 disposed outside the chemical tank 100 for connecting the inflow conduit 111 and the outflow conduit 112 to heat exchange with cold water or hot water, .

The open / close valve 115 disposed at the inlet pipe 111 allows or blocks the flow of cold water or hot water to the chemical tank 100 through the inlet pipe 111, (115) may allow or block the flow of cold water or hot water on the side of the heat exchange module (120).

At this time, only when the open / close valve 115 disposed in each of the inflow conduit 111 and the outflow conduit 112 is opened, the cold water or hot water flows into the heat exchange pipe (not shown) in the inner wall of the chemical tank 100 Described heat exchange module 120, and the contents of the chemical tank 100 can be maintained within a predetermined temperature range by cold water or hot water.

On the other hand, the inlet duct 111 according to the present embodiment as described above can be supplied with power generation facilities or cooling water for air conditioning in the hull. Such cooling water can be provided in a temperature range near room temperature.

Such cooling water is supplied so that the temperature of the contents can be maintained within a predetermined temperature range. That is, when the temperature of the contents rises or falls above a predetermined temperature, it may be supplied to the inflow conduit 111 side and flow to the outflow conduit 112.

The cold / hot water line unit 110 is provided with an opening / closing valve 115 in the inlet pipe 111 and the outlet pipe 112, respectively. The cold / hot water line unit 110 is disposed in the outlet pipe 112, A circulation pump 130 for circulating cold water or hot water to the chemical tank 100 and a temperature sensor 122 disposed in the chemical tank 100 to sense the temperature of the contents inside the chemical tank 100, Closing valve 115 and the circulation pump 130 based on the temperature of the contents sensed by the temperature sensor 122 to supply or block the cooling water.

At this time, the control unit 125 can open / close the inlet pipe 111 and the outlet pipe 112 side opening / closing valve 115, for example, when the content is detected by the temperature sensor 122 at the image 5 . Accordingly, by opening the on-off valve 115, the cooling water can be supplied to the temperature holding pipe side so that the temperature of the contents can be maintained at the temperature of the cooling water.

According to an embodiment of the present invention, a vessel or an offshore structure including the chemical tank temperature maintenance device for reducing the exhaust gas of the engine described above may be provided. At this time, the ship according to the present embodiment may be a drill ship as well as a commercial vessel.

Such a ship or an offshore structure can stably keep the contents stored in the chemical tank 100 at a suitable temperature range suitable for the characteristics, and the piping structure is simple, thereby reducing the manufacturing cost and ensuring the stability and durability in use .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Deletion, addition or the like of the present invention may be variously modified and changed within the scope of the present invention.

100: chemical tank 110: cold / hot water line unit
111: inlet pipe 112: outlet pipe
115: opening / closing valve 120: heat exchange module
122: temperature sensor 125:
130: circulation pump

Claims (7)

A chemical tank in which a content capable of hydrolyzing exhaust gas is stored; And
A cold / hot water line unit disposed inside the inner wall of the chemical tank to indirectly transmit heat to the contents, and in which cold or hot water is selectively supplied to maintain the temperature of the contents within a predetermined range; / RTI >
The contents are Urea or NaOH,
The predetermined range of the temperature is from 5 to 45 degrees Celsius when the concentration of Urea is 40% and from 16 to 45 degrees Celsius when the concentration of NaOH is 50%
The cold / hot water line unit includes:
A heat exchange module disposed outside the chemical tank for performing heat exchange with the cold water or hot water and selectively discharging the cold water or hot water;
An inlet pipe connected at one end to the heat exchange module and connected at the other end to the chemical tank so that the cold or hot water discharged from the heat exchange module flows into the chemical tank;
An outflow conduit connected to the chemical tank at one end and connected at the other end to the heat exchange module so that the cold or hot water discharged from the chemical tank flows to the heat exchange module;
An open / close valve disposed in the inlet pipe and the outlet pipe, respectively;
A circulation pump disposed in the outflow conduit for circulating the cold water or hot water to the heat exchange module side; And
A temperature sensor disposed in the chemical tank to sense the temperature of the contents inside the chemical tank;
And a controller connected to the temperature sensor for operating the on-off valve and the circulation pump based on the temperature of the content sensed by the temperature sensor to supply or block the power generation facility or the cooling water for air conditioning,
The power generation facility or the cooling water for air conditioning is supplied to the heat exchange module,
Wherein the inlet pipe and the outlet pipe are formed in a single circulation loop and both the heating and cooling of the contents of the chemical tank are performed by the one circulation loop. .
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