KR20150144484A - 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 pipe arranged inside the chemical tank and selectively supplied with cold water or hot water so that the temperature of the contents can be maintained within a predetermined range. This chemical tank temperature maintenance device for reducing exhaust gas has a simple piping structure because it does not use a separate heat exchanger or a steam pipe, thereby reducing the manufacturing cost, easy operation, high stability and durability in use.

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.

In order to maintain the temperature of the chemical stored in the chemical tank, a separate heat exchanger or a direct / indirect heating coil using steam is used outside the chemical tank.

However, in the case of using a separate heat exchanger or steam to maintain the temperature of the chemical product, the piping structure is complicated by using a separate heat exchanger to raise the manufacturing cost. In addition, when using steam, a double pipe should be applied. A separate temperature alarm, a control valve, and a separate cooler must be applied to prevent overheating, which also raises production costs and lowers stability.

Korean Patent Application No. 10-2011-078064

An embodiment of the present invention is to provide a chemical tank for reducing the exhaust gas of an engine which is simple in operation and simple in operation and high in durability in use and has a simple piping structure because it does not use a separate heat exchanger or steam pipe Retaining device and a vessel or an offshore structure including the same.

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 pipe arranged inside the chemical tank, the cold / hot water pipe being selectively supplied with cold water or hot water so as to maintain the temperature of the contents within a predetermined range.

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 pipe may include an inlet pipe connected to the chemical tank for introducing the cold 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 temperature holding pipe connected to the inflow conduit and the outflow conduit and disposed inside the chemical tank for cooling or heating the contents.

An open / close valve disposed in the inlet pipe and the outlet pipe, respectively; And a temperature sensor disposed in the chemical tank to sense the temperature of the contents inside the chemical tank.

The inlet pipe may be supplied with power generation equipment or cooling water for air conditioning in the hull.

The controller may further include a controller connected to the temperature sensor for supplying or blocking the cooling water by operating the on-off valve based on the temperature of the contents detected by the temperature sensor.

Wherein the cold / hot water pipe connects the inflow conduit and the outflow conduit of the chemical tank and bypasses the cold water or hot water supplied to the inflow conduit to the outflow conduit; And a bypass valve disposed in the bypass conduit.

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, there is provided a chemical tank for reducing the exhaust gas of an engine which is simple in operation, simple in operation, high in stability in use, and high in durability, by using a separate heat exchanger or steam pipe, A temperature holding device and a ship or an ocean structure including the same can be provided.

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.
Fig. 2 shows another embodiment of Fig.
Fig. 3 is another embodiment of 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 exhaust gas of an engine according to an embodiment of the present invention includes a chemical tank 100 storing contents capable of hydrolyzing exhaust gas, And a cold / hot water pipe 110 disposed inside the tank 100 and selectively supplying cold water or hot water 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 pipe 110 capable of selectively supplying cold water or hot water, and cooling water or hot water used in a ship or an hull of an offshore structure may be supplied to the cold / hot water pipe 110 .

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. 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 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. The cooling water may be supplied to the cold / hot water pipe 110 to maintain the contents of the chemical tank 100 at a predetermined temperature.

The chemical tank temperature holding device for reducing the exhaust gas of the engine according to the present embodiment does not use a separate heat exchanger or steam pipe as in the prior art, thereby simplifying the piping structure, reducing the manufacturing cost, High stability and durability.

In addition, the content according to this embodiment is Urea (element) or NaOH, and the predetermined range of the temperature is 5 to 45 degrees Celsius when the concentration of Urea is 40%, and 16 degrees Celsius when the concentration of NaOH is 50% 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 pipe 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 temperature maintenance pipe 120 connecting the inlet pipe 111 and the outlet pipe 112 to the inside of the chemical tank 100 and cooling or heating the contents, .

The inlet pipe 111 and the outlet pipe 112 are connected to the chemical tank 100 from the outside of the chemical tank 100 and the temperature maintaining pipe 120 is connected to the inlet pipe 111 inside the chemical tank 100, And the outflow conduit 112 can be connected to each other. The inflow conduit 111 and the outflow conduit 112 may be connected to a pipeline for circulating cold water or hot water.

The cold / hot water pipe 110 according to the present embodiment includes an opening / closing valve 115 disposed in the inlet pipe 111 and the outlet pipe 112, And a temperature sensor 122 disposed in the chemical tank 100.

The open / close valve 115 disposed in the inflow conduit 111 allows or blocks the flow of cold water or hot water through the inflow conduit 111 to the temperature maintaining conduit 120 side, (115) can allow or block the flow of cold water or hot water from the side of the temperature maintenance pipe (120) to the side of the outflow pipe (112).

At this time, only the open / close valve 115 disposed in each of the inflow conduit 111 and the outflow conduit 112 is opened to flow the cold or hot water through the temperature maintaining conduit 120 disposed inside the chemical tank 100 It is possible to return to the cold water or hot water pipeline described above 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.

To this end, the chemical tank temperature holding device for reducing the exhaust gas of the engine according to the present embodiment is provided with a chemical tank temperature holding device for operating the on / off valve 115 based on the temperature of the contents sensed by the temperature sensor 122, And a controller 125 for supplying or cutting off the cooling water.

The control unit 125 may open and close the inlet pipe 111 and the outlet pipe 112 on the basis of the temperature detected by the temperature sensor 122. For example, Accordingly, by opening the on-off valve 115, the cooling water is supplied to the temperature holding pipe 120 side, and the temperature of the contents can be maintained at the temperature of the cooling water.

2, the cold / hot water pipe 110 according to another embodiment of the present invention connects the inlet pipe 111 and the outlet pipe 112 of the chemical tank 100 to the inlet pipe 111 A bypass pipe 130 for bypassing the supplied cold water or hot water to the outflow pipe 112 and a bypass valve 135 disposed in the bypass pipe 130.

The cold / hot water pipe 110 bypasses the cold water or hot water supplied to the temperature maintaining pipe 120 toward the bypass pipe 130 and can directly flow from the inlet pipe 111 side to the outlet pipe 112 side.

The bypass pipe 130 is usable when the contents of the chemical tank 100 are maintained within the temperature range defined by the outside air. That is, when the supply of hot water or cold water to the temperature holding pipe 120 side is partially or completely unnecessary.

The bypass conduit 130 opens the bypass conduit 130 in a state where the open / close valve 115 on the side of the inlet conduit 111 and the outlet conduit 112 is open, The amount of the cold water or the hot water supplied to the temperature maintaining pipe 120 can be completely reduced in a state in which the opening and closing valve 115 of the inlet pipe 111 is closed.

3, the bypass valve 135 and the on-off valve 115 are provided as one integrated three-way valve 140 and connected to the inflow conduit 111 and the outflow conduit 112, The bypass conduit 130 may be connected to the bypass conduit 130 at a connection point.

At this time, when the three-way valve 140 is opened to the bypass pipe 130, the cold water or the hot water may flow from the inflow pipe 111 to the outflow pipe 112 via the bypass pipe 130.

The flow amount of the cold water or the hot water is determined from the inlet pipe 111 to the bypass pipe 130 side depending on the flow area opened to the bypass pipe 130, The flow amount of cold water or hot water flowing is determined.

The three-way valve 140 reduces the installation volume and the number of operations by integrating the bypass valve 135 and the on-off valve 115, and can reduce the control step in the automatic implementation of opening and closing.

According to one embodiment of the present invention, a vessel or an offshore structure including the chemical tank temperature maintenance apparatus for reducing the exhaust gas of the engine described above can 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 may be constructed such that a steam pipe or heat exchanger for maintaining the temperature of the chemical tank 100 within a predetermined temperature range is not disposed or installed inside or outside the chemical tank 100, It is possible to maintain the stored contents in the temperature range suitable for the characteristic, so that the piping structure is simple, the manufacturing cost is reduced, the operation is simple, the stability of the use, High durability.

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 pipe
111: inlet pipe 112: outlet pipe
115: opening / closing valve 120: temperature holding pipe
122: temperature sensor 125:
130: bypass pipe 135: bypass valve

Claims (8)

A chemical tank in which a content capable of hydrolyzing exhaust gas is stored; And
And a cold / hot water pipe which is disposed inside the chemical tank and to which cold water or hot water is selectively supplied so that the temperature of the contents can be maintained within a predetermined range. The method according to claim 1,
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 between 16 and 45 degrees Celsius when the concentration of NaOH is 50% . 3. The method of claim 2,
The cold /
An inlet pipe connected to the chemical tank 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
And a temperature holding pipe connected to the inlet pipe and the outlet pipe and disposed inside the chemical tank for cooling or heating the contents. The method of claim 3,
An open / close valve disposed in the inlet pipe and the outlet pipe, respectively; And
And a temperature sensor disposed in the chemical tank to sense the temperature of the contents inside the chemical tank. 5. The method of claim 4,
Wherein the inflow channel is supplied with power generation facilities in the hull or cooling water for air conditioning, for maintaining the temperature of the chemical tank for reducing the exhaust gas of the engine. 6. The method of claim 5,
And a control unit connected to the temperature sensor and configured to operate the on / off valve based on the temperature of the contents sensed by the temperature sensor to supply or block the cooling water. The method of claim 3,
The cold /
A bypass conduit connecting the inflow conduit and the outflow conduit of the chemical tank and bypassing the cold water or hot water supplied to the inflow conduit to the outflow conduit; And
Further comprising: a bypass valve disposed in the bypass conduit; and a bypass valve disposed in the bypass conduit. A ship or an offshore structure comprising a chemical tank temperature holding device for reducing exhaust gas of the engine according to any one of claims 1 to 7.

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