KR20210069972A - Ammonia supply system - Google Patents

Abstract

The present invention provides an ammonia supply system that prevents ammonia from leaking and harming users. According to an embodiment of the present invention, an ammonia supply system comprises: an ammonia tank for storing ammonia; a reducing agent injection unit which injects ammonia into an exhaust gas directed to a reactor to reduce nitrogen oxides; a reducing agent supply device for supplying the ammonia stored in the ammonia tank to the reducing agent injection unit; an ammonia supply pipe formed of a double pipe structure which connects the reducing agent supply device and the reducing agent injection unit and includes a supply inner pipe through which ammonia moves and a leak-proof outer pipe surrounding the supply inner pipe; and a leak detection device installed on the leak-proof outer pipe of the ammonia supply pipe.

Description

Ammonia supply system {AMMONIA SUPPLY SYSTEM}

The present invention relates to an ammonia supply system, and more particularly, to an ammonia supply system for supplying ammonia used as a reducing agent in a selective catalytic reduction reaction for reducing nitrogen oxides contained in exhaust gas.

As industrialization progresses rapidly, the use of various fossil fuels such as petroleum and coal has increased. As a result, various harmful gases emitted during the combustion of fossil fuels cause serious air pollution. Typical examples include smog and acid rain.

The main culprits of air pollution include sulfur oxides (SOx) and nitrogen oxides (NOx) in exhaust gases emitted from engines of vehicles and ships, thermal power plants, factories, and the like.

In recent years, with the increasing awareness of environmental conservation, emission regulations for these sulfur oxides and nitrogen oxides have been introduced.

In particular, there is a selective catalytic reduction (SCR) system as a representative facility for reducing nitrogen oxides. In the selective catalytic reduction system, the exhaust gas and the reducing agent pass together through a reactor in which the catalyst is installed, and the nitrogen oxides and the reducing agent contained in the exhaust gas are reacted to reduce the nitrogen and water vapor.

_{At this time, ammonia (NH 3} ) is used as a reducing agent for reducing nitrogen oxides, and ammonia as a reducing agent is injected into the exhaust gas moving toward the catalyst.

However, since ammonia has a relatively strong action to corrode metal, if a pipe or valve for supplying ammonia is exposed to ammonia for a long time, ammonia may leak as it corrodes. In addition, even by an external impact caused by an accident, etc., a tank, a pipe, a valve, etc. for storing ammonia may be damaged and ammonia may leak. Since such ammonia is a toxic substance, a safety device to protect the user from leaked ammonia is required.

An embodiment of the present invention provides an ammonia supply system that prevents ammonia from leaking and harming users.

According to an embodiment of the present invention, the ammonia supply system includes an ammonia tank for storing ammonia, a reducing agent injecting unit for injecting ammonia into the exhaust gas directed to the reactor in order to reduce nitrogen oxides, and the ammonia stored in the ammonia tank as the reducing agent A reducing agent supply device for supplying to the injection unit, the ammonia supply pipe connected to the reducing agent supply device and the reducing agent injection unit and formed in a double pipe structure including a supply inner tube through which ammonia moves and a leak-proof exterior surrounding the supply inner tube, and the ammonia Include a leak detection device installed on the leak-tight façade of the supply line.

The reducing agent injection unit may be installed at one or more positions among an exhaust passage for moving the exhaust gas discharged from the engine to the reactor, an exhaust receiver of the engine, and a connection pipe between the engine and the exhaust receiver.

The ammonia supply system includes a fuel supply device for supplying the ammonia stored in the ammonia tank as a fuel to the engine, an additional ammonia supply pipe connecting the fuel supply device and the engine and having the same structure as the ammonia supply pipe, and the addition It may further include an additional leak detection device installed in the ammonia supply pipe of the.

In addition, the ammonia supply system includes a safety chamber accommodating the ammonia tank and the reducing agent supply device therein, and a chamber exhaust fan installed in one area of the safety chamber to discharge the gas inside the safety chamber to the safety area. may include more.

The ammonia supply system may further include a chamber gas detector installed inside the safety chamber. In addition, when the concentration of ammonia detected by the chamber gas detector is greater than or equal to a preset concentration, the chamber exhaust fan may be operated.

In addition, the ammonia supply system includes an ammonia recovery tray supporting the ammonia tank and the reducing agent supply device from below in the safety chamber, a drain tank for recovering and storing ammonia collected in the ammonia recovery tray, and the ammonia recovery tray and the It may further include an ammonia recovery pipe connecting the drain tank.

In addition, the ammonia supply system may further include a drain tank for recovering and storing liquid ammonia from the leak-proof exterior of the ammonia supply pipe, and a drain line connecting the leak-proof exterior of the ammonia supply pipe and the drain tank. have.

The ammonia supply system includes a test tank installed on the drain line, an ammonia concentration sensor or ammonia discrimination sensor installed in the test tank, a drain valve installed in the drain line between the test tank and the drain tank, and the test tank It may further include a flow meter or a flow switch installed in the drain line between the tank and the ammonia supply pipe.

When the flow meter or the flow switch detects movement of the liquid on the drain line, the drain valve is closed to collect the liquid moving along the drain line in the test tank, and the ammonia concentration sensor or the ammonia determination sensor By determining whether the liquid collected in the test tank is ammonia, it is possible to determine whether ammonia leaks from the inner supply pipe of the ammonia supply pipe.

When the liquid collected in the test tank is determined to be ammonia, the drain valve may be opened to move the ammonia to the drain tank.

In addition, the ammonia supply system may further include a resupply pump for moving the ammonia recovered in the drain tank to the ammonia tank.

In addition, the ammonia supply system may supply water to the drain tank to dilute the stored ammonia and then discharge it to the outside.

In addition, the ammonia supply system may further include a tank exhaust fan installed above the ammonia tank to discharge gaseous ammonia from the inside of the ammonia tank to a safe area.

The leak detection device may include one or more exterior gas detectors for detecting ammonia in the inside of the leak-proof exterior of the ammonia supply pipe.

The leak detection device includes an exterior gas detector for detecting ammonia from a gas discharged through a discharge hole formed at one end of the leakage preventing exterior of the ammonia supply pipe, and a compressed air supply connected to the other end of the leakage preventing exterior of the ammonia supply pipe. may include

In addition, the leak detection device includes a suction blower installed in a discharge hole formed at one end of the leakage preventing exterior of the ammonia supply pipe, a suction hole formed at the other end of the leakage preventing exterior of the ammonia supply pipe, and the suction blower It may include an external gas detector for detecting ammonia from the gas sucked by the.

In addition, the ammonia supply system includes a safety chamber accommodating the ammonia tank and the reducing agent supply device therein, and a chamber exhaust fan installed in one area of the safety chamber to discharge the gas inside the safety chamber to the safety area. Further comprising, the discharge hole formed at one end of the leakage preventing exterior of the ammonia supply pipe may be located inside the safety chamber.

According to an embodiment of the present invention, the ammonia supply system can effectively prevent ammonia from leaking and harming the user.

1 is a block diagram showing an ammonia supply system according to a first embodiment of the present invention.
FIG. 2 is an enlarged view of the ammonia supply pipe used in the ammonia supply system of FIG. 1 .
3 is an enlarged view of the ammonia supply pipe used in the ammonia supply system according to the second embodiment of the present invention.
4 is an enlarged view of the ammonia supply pipe used in the ammonia supply system according to the third embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In addition, in various embodiments, components having the same configuration are typically described in the first embodiment using the same reference numerals, and in other embodiments, only configurations different from those of the first embodiment will be described. .

It is noted that the drawings are schematic and not drawn to scale. Relative dimensions and proportions of parts in the drawings are shown exaggerated or reduced in size for clarity and convenience in the drawings, and any dimensions are illustrative only and not limiting. In addition, the same reference numerals are used to indicate like features to the same structure, element, or part appearing in two or more drawings.

The embodiment of the present invention specifically represents an ideal embodiment of the present invention. As a result, various modifications of the diagram are expected. Therefore, the embodiment is not limited to a specific shape of the illustrated area, and includes, for example, a shape modification by manufacturing.

Hereinafter, an ammonia supply system 101 according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2 .

Ammonia supply system 101 according to the first embodiment of the present invention is used in a selective catalytic reduction (SCR) system for reducing nitrogen oxides (NOx) contained in exhaust gas and a reducing agent required for the reduction reaction Phosphorus ammonia (NH ₃ ) is supplied.

For example, the selective catalytic reduction system reduces the nitrogen oxide content of the exhaust gas by removing nitrogen oxides (NOx) contained in the exhaust gas discharged from the engine 100 through a reduction reaction. Here, the engine 100 may be a two-stroke low-speed or four-stroke medium-speed diesel engine used in ships or a vehicle engine.

However, the selective catalytic reduction system is not limitedly used as described above, and may be used in various fields such as plants.

In addition, the exhaust gas containing nitrogen oxides (NOx) discharged from the engine 100 moves through the exhaust passage 150 . That is, the exhaust passage 150 is connected to the exhaust receiver 140 of the engine 100 to discharge the exhaust gas of the engine 100 and may be connected to the reactor 300 of the selective catalytic reduction system.

In addition, in the selective catalytic reduction system, ammonia (NH ₃ ) is used as a reducing agent for direct reduction reaction with nitrogen oxides. However, since ammonia itself is a contaminant and it is not easy to store and transport, it is common to use a _{stable urea (urea, CO(NH 2} ) _{2 ) aqueous solution corresponding to a reducing agent precursor.} Urea (urea, CO(NH ₂ ) ₂ ) aqueous solution is hydrolyzed or pyrolyzed _{to produce ammonia (NH 3} ) and isocyanic acid (HNCO). And isocyanic acid (HNCO) is again decomposed into _{ammonia (NH 3} ) and carbon dioxide (CO _{2 ).} That is, urea is decomposed to produce ammonia, which is a reducing agent that reacts with nitrogen oxides. The ammonia generated in this way is injected into the exhaust gas moving toward the reactor 300 of the selective catalytic reduction system along the exhaust passage 150 and mixed with the exhaust gas.

1 and 2, the ammonia supply system 101 according to the first embodiment of the present invention includes an ammonia tank 510, a reducing agent injection unit 370, a reducing agent supply device 520, and an ammonia supply pipe ( 610 , and a leak detection device 801 .

In addition, the ammonia supply system 101 according to the first embodiment of the present invention includes a fuel supply device 530 , a safety chamber 550 , a chamber exhaust fan 558 , an ammonia recovery tray 580 , and a drain tank 400 . , an ammonia recovery pipe 680 , a drain line 660 , a test tank 450 , a drain valve 760 , a resupply pump 770 , a chamber gas detector 875 , and a tank exhaust fan 518 . can do.

In addition, the ammonia supply system 101 may further include a water supply unit 460 and an ammonia replenishment unit 410 , and further include an ammonia concentration sensor 730 or an ammonia determination sensor, and a flow meter or flow switch 740 . can do.

The ammonia tank 510 stores ammonia to be supplied to the reducing agent injection unit 370 to be described later. In addition, ammonia stored in the ammonia tank 510 may be supplied to the engine 100 as fuel.

When the ammonia stored in the ammonia tank 510 is consumed, the ammonia replenishment unit 410 may supplement it. As an example, the ammonia supplement 410 may _{generate ammonia (NH 3} ) by hydrolyzing or thermally decomposing an aqueous solution of _{urea (urea, CO(NH 2} ) _{2 ).}

The tank exhaust fan 518 may be installed above the ammonia tank 510 to discharge gaseous ammonia from the inside of the ammonia tank 510 to a safe area. Here, the stable area means an area in which the user does not directly come into contact with ammonia.

The reducing agent injection unit 370 injects ammonia into the exhaust gas directed to the reactor 300 in order to reduce nitrogen oxides. In the first embodiment of the present invention, the reducing agent injection unit 370 is an exhaust flow path 150 for moving the exhaust gas discharged from the engine 100 to the reactor 300, the exhaust receiver 140 of the engine 100, and a connection pipe between the engine 100 and the exhaust receiver 140 .

The reducing agent supply device 520 supplies the ammonia stored in the ammonia tank 510 to the reducing agent injection unit 370 . As an example, the reducing agent supply device 520 may include a supply pump module for supplying ammonia stored in the ammonia tank 510 . Here, the supply pump module may include a pump for supplying ammonia, a filter, a pressure gauge, a valve, etc. necessary for installing the pump.

The fuel supply device 530 supplies ammonia stored in the ammonia tank 510 to the engine 100 as fuel. The fuel supply device 530 may have the same configuration as the reducing agent supply device 520 . However, since the fuel supply device 530 and the reducing agent supply device 520 have different purposes for supplying ammonia, the amount of ammonia supplied or the concentration of ammonia to be supplied may be different from each other.

The ammonia supply pipe 610 connects the reducing agent supply device 520 and the reducing agent injection unit 370 . In particular, in the first embodiment of the present invention, the ammonia supply pipe 610 is formed in a double pipe structure including a supply inner tube 611 through which ammonia moves, and a leak-proof outer tube 612 surrounding the supply inner tube 611. . That is, the supply inner tube 611 moves ammonia, and the leakage preventing outer tube 612 prevents the gas or liquid ammonia leaking from the inner supply tube 611 from leaking to the outside.

In addition, the additional ammonia supply pipe 620 may connect the fuel supply device 530 and the engine 100 . The additional ammonia supply pipe 620 may be formed in the same structure as the ammonia supply pipe 610 . That is, the additional ammonia supply pipe 620 may also include a supply inner pipe 621 and a leak-proof exterior 622 .

The safety chamber 550 accommodates the ammonia tank 510 , the reducing agent supply device 520 , and the fuel supply device 530 therein. That is, the safety chamber 550 prevents leakage of ammonia leaking from the ammonia tank 510 , the reducing agent supply device 520 , or the fuel supply device 530 .

The chamber gas detector 875 may detect ammonia in the safety chamber 550 .

The chamber exhaust fan 558 may be installed in one area of the safety chamber 550 to discharge gas inside the safety chamber 550 to the safety area. For example, when the concentration of ammonia detected by the chamber gas detector 875 is greater than or equal to a preset reference concentration, the chamber exhaust fan 558 may be operated to ventilate the inside of the safety chamber 550 .

In addition, the chamber exhaust fan 558 may discharge gaseous ammonia from the inside of the drain tank 400 to be described later to the safe area.

The ammonia recovery tray 580 supports the ammonia tank 510 , the reducing agent supply device 520 , and the fuel supply device 530 in the safety chamber 550 from below. That is, when liquid ammonia leaks from the ammonia tank 510 , the reducing agent supply device 520 , or the fuel supply device 530 , the ammonia recovery tray 580 collects it.

The drain tank 400 may recover and store ammonia collected in the ammonia recovery tray 580 or recover and store ammonia in a liquid state from the leakage preventing exterior 612 of the ammonia supply pipe 610 . In addition, the drain tank 400 may recover and store ammonia in a liquid state from the leakage preventing exterior 622 of the additional ammonia supply pipe 620 .

The ammonia recovery pipe 680 connects the ammonia recovery tray 580 and the drain tank 400 . That is, the liquid ammonia collected in the ammonia recovery tray 580 through the ammonia recovery pipe 680 may be recovered to the drain tank 400 .

The drain line 660 connects the leak-proof exterior 612 of the ammonia supply pipe 610 and the drain tank 400 . In addition, the drain line 660 may also connect the leak-proof exterior 622 of the additional ammonia supply pipe 620 and the drain tank 400 .

The test tank 450 is installed on the drain line 660 . Ammonia flowing from the leak-proof exterior 612 of the ammonia supply pipe 610 to the drain tank 400 through the drain line 660 is first subjected to a predetermined test in the test tank 450 .

The ammonia concentration sensor 730 or the ammonia determination sensor is installed in the test tank 400 .

The drain valve 760 is installed in the drain line 660 between the test tank 450 and the drain tank 400 .

A flow meter or flow switch 740 is installed in the drain line 660 between the test tank 450 and the ammonia supply pipe 610 and between the test tank 450 and the additional ammonia supply pipe 610 .

With this configuration, when the flow meter or the flow switch 740 detects movement of the liquid on the drain line 660 , the drain valve 760 is closed to transfer the liquid moving along the drain line 660 to the test tank 450 . collected from

By determining whether the liquid collected in the test tank 450 is ammonia through the ammonia concentration sensor 730 or the ammonia determination sensor, the supply inner pipe 611 of the ammonia supply pipe 610 or the supply inner pipe 621 of the additional ammonia supply pipe 620 Determine whether ammonia leaks from the

When the liquid collected in the test tank 450 is determined to be ammonia, the drain valve 760 is opened to move the ammonia collected in the test tank 450 to the drain tank 400 .

On the other hand, if it is determined that the liquid collected in the test tank 450 is not ammonia, the liquid collected in the test tank 450 is drained to the outside.

The resupply pump 770 may move the ammonia recovered in the drain tank 400 to the ammonia tank 510 .

Also, the water supply unit 460 may supply water to the drain tank 400 to dilute ammonia stored in the drain tank 400 . And when the ammonia stored in the drain tank 400 is diluted to a level harmless to the user, it can be discharged to the outside.

The leak detection device 801 is installed on the leak-proof exterior 612 of the ammonia supply pipe 610 . That is, the leak detection device 801 may detect ammonia from the leak prevention exterior 612 of the ammonia supply pipe 610 . In addition, the leak detection device 801 may be installed in the additional ammonia supply pipe (620). That is, an additional leak detection device identical to the leak detection device 801 may be installed in the additional ammonia supply pipe 620 .

In particular, in the first embodiment of the present invention, the leak detection device 801 detects ammonia from the gas discharged through the discharge hole 619 formed at one end of the leakage preventing exterior 612 of the ammonia supply pipe 610. The gas detector 870 and the compressed air supply unit 810 connected to the other end of the leakage preventing exterior 612 of the ammonia supply pipe 610 through the inlet pipe 616 may be included. In this case, the discharge hole 619 formed at one end of the leakage preventing exterior 612 of the ammonia supply pipe 610 may be located inside the safety chamber 550 .

Therefore, the gaseous ammonia leaking from the supply inner tube 611 and present inside the leak-proof casing 612 is discharged from the discharge hole 619 of the leak-proof casing 612 by compressed air to the safety chamber 550. moves to the inside of

And when the ammonia concentration in the safety chamber 550 is greater than or equal to the preset concentration, the chamber exhaust fan 558 is operated to discharge the ammonia inside the safety chamber 550 to the safe area to clean the inside of the safety chamber 550 . ventilate

By such a configuration, the ammonia supply system 101 according to the first embodiment of the present invention can effectively prevent ammonia from leaking and harming the user.

Hereinafter, an ammonia supply system 102 according to a second embodiment of the present invention will be described with reference to FIG. 3 .

As shown in FIG. 3 , the leak detection device 802 used in the ammonia supply system 102 according to the second embodiment of the present invention is a discharge formed at one end of the leak-proof exterior 612 of the ammonia supply pipe 610 . A suction blower 840 installed in the hole 619, a suction hole 617 formed at the other end of the leak-proof exterior 612 of the ammonia supply pipe 610, and the gas sucked by the suction blower 840 It includes an external gas detector 870 for detecting ammonia from. At this time, the discharge hole 619 and the suction blower 840 formed at one end of the leakage preventing exterior 612 of the ammonia supply pipe 610 may be located inside the safety chamber 550 .

Accordingly, ammonia in a gaseous state leaking out of the supply inner tube 611 and present inside the leak-proof exterior 612 is sucked by the suction blower 840 and directed to the inside of the safety chamber 550 . And when the ammonia concentration in the safety chamber 550 is greater than or equal to the preset concentration, the chamber exhaust fan 558 is operated to discharge the ammonia inside the safety chamber 550 to the safe area to clean the inside of the safety chamber 550 . ventilate

With this configuration, the ammonia supply system 101 according to the second embodiment of the present invention can also effectively prevent ammonia from leaking and harming the user.

Hereinafter, an ammonia supply system 103 according to a third embodiment of the present invention will be described with reference to FIG. 4 .

As shown in FIG. 4 , the leak detection device 803 used in the ammonia supply system 103 according to the third embodiment of the present invention detects ammonia from the inside of the leak prevention exterior 612 of the ammonia supply pipe 610 . It includes one or more external gas detectors 870 to detect.

When the length of the ammonia supply pipe 610 is long, it is difficult to effectively detect it with one external gas detector 870 , so the number of external gas detectors 870 installed according to the length of the ammonia supply pipe 610 can be adjusted.

By such a configuration, the ammonia supply system 103 according to the third embodiment of the present invention can also effectively prevent ammonia from leaking and harming the user.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains can understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential features thereof. will be.

Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims, the meaning and scope of the claims, and All changes or modifications derived from the equivalent concept should be construed as being included in the scope of the present invention.

100: engine
101, 102, 103: ammonia supply system
140: exhaust receiver
150: exhaust flow path
300: reactor
370: reducing agent injection unit
400: drain tank
410: ammonia supplement
450: test tank
460: water supply
510: ammonia tank
518: tank exhaust fan
520: reducing agent supply device
530: fuel supply device
550: safety chamber
558: chamber exhaust fan
580: ammonia recovery tray
610: ammonia supply pipe
611, 621: supply inner tube
612, 622: Leak-proof appearance
616: inlet pipe
617: suction hole
619: exhaust hole
620: additional ammonia supply line
660: drain line
680: ammonia recovery pipe
730: ammonia concentration sensor
740: flow switch
760: drain valve
770: resupply pump
801, 802, 803: leak detection device
840: suction blower
870: exterior gas detector
875: chamber gas detector

Claims (17)

ammonia tank to store ammonia;
a reducing agent injection unit for injecting ammonia into the exhaust gas directed to the reactor to reduce nitrogen oxides;
a reducing agent supply device for supplying the ammonia stored in the ammonia tank to the reducing agent injection unit;
an ammonia supply pipe connecting the reducing agent supply device and the reducing agent injection unit, the ammonia supply pipe formed in a double pipe structure including a supply inner tube through which ammonia moves and a leak-proof exterior surrounding the supply inner tube; and
A leak detection device installed on the leak-proof exterior of the ammonia supply pipe
Ammonia supply system comprising a. According to claim 1,
The reducing agent injection unit is an ammonia supply system, characterized in that it is installed in at least one position of the exhaust passage for moving the exhaust gas discharged from the engine to the reactor, the exhaust receiver of the engine, and the connection pipe between the engine and the exhaust receiver. According to claim 1,
a fuel supply device for supplying the ammonia stored in the ammonia tank as fuel to the engine;
an additional ammonia supply pipe connecting the fuel supply device and the engine and having the same structure as the ammonia supply pipe; and
An additional leak detection device installed in the additional ammonia supply line
Ammonia supply system, characterized in that it further comprises. According to claim 1,
a safety chamber accommodating the ammonia tank and the reducing agent supply device therein; and
A chamber exhaust fan installed in one area of the safety chamber to discharge the gas inside the safety chamber to the safety area
Ammonia supply system, characterized in that it further comprises. 5. The method of claim 4,
Further comprising a chamber gas detector installed inside the safety chamber,
When the concentration of ammonia detected by the chamber gas detector is greater than or equal to a preset concentration, the chamber exhaust fan is operated. 5. The method of claim 4,
an ammonia recovery tray supporting the ammonia tank and the reducing agent supply device from below in the safety chamber;
a drain tank for recovering and storing ammonia collected in the ammonia recovery tray; and
An ammonia recovery pipe connecting the ammonia recovery tray and the drain tank
Ammonia supply system, characterized in that it further comprises. According to claim 1,
a drain tank for recovering and storing liquid ammonia from the leak-preventing exterior of the ammonia supply pipe;
A drain line connecting the leak-proof exterior of the ammonia supply pipe and the drain tank
Ammonia supply system, characterized in that it further comprises. 8. The method of claim 7,
a test tank installed on the drain line;
an ammonia concentration sensor or ammonia determination sensor installed in the test tank;
a drain valve installed in the drain line between the test tank and the drain tank; and
A flow meter or flow switch installed in the drain line between the test tank and the ammonia supply pipe
Ammonia supply system, characterized in that it further comprises. 9. The method of claim 8,
When the flow meter or the flow switch detects movement of the liquid on the drain line, closing the drain valve to collect the liquid moving along the drain line into the test tank;
Ammonia supply system, characterized in that it is determined whether ammonia leaks from the supply inner pipe of the ammonia supply pipe by determining whether the liquid collected in the test tank is ammonia through the ammonia concentration sensor or the ammonia discrimination sensor. 10. The method of claim 9,
When the liquid collected in the test tank is determined to be ammonia, the drain valve is opened to move the ammonia to the drain tank. 8. The method of claim 6 or 7,
Ammonia supply system, characterized in that it further comprises a resupply pump for moving the ammonia recovered in the drain tank to the ammonia tank. 8. The method of claim 6 or 7,
Ammonia supply system, characterized in that by supplying water to the drain tank to dilute the stored ammonia and then discharging to the outside. According to claim 1,
Ammonia supply system, characterized in that it further comprises a tank exhaust fan installed at the upper portion of the ammonia tank to discharge gaseous ammonia from the inside of the ammonia tank to a safe area. According to claim 1,
The leak detection device comprises one or more exterior gas detectors for detecting ammonia inside the leak-proof exterior of the ammonia supply pipe. According to claim 1,
The leak detection device,
an exterior gas detector for detecting ammonia from a gas discharged through a discharge hole formed at one end of the leakage preventing exterior of the ammonia supply pipe;
A compressed air supply unit connected to the other end of the leak-proof exterior of the ammonia supply pipe
Ammonia supply system comprising a. According to claim 1,
The leak detection device,
a suction blower installed in a discharge hole formed at one end of the leak-proof exterior of the ammonia supply pipe;
a suction hole formed at the other end of the leak-proof exterior of the ammonia supply pipe; And
Appearance gas detector for detecting ammonia from the gas sucked by the suction blower
Ammonia supply system comprising a. 17. The method of claim 15 or 16,
a safety chamber accommodating the ammonia tank and the reducing agent supply device therein; and
A chamber exhaust fan installed in one area of the safety chamber to discharge the gas inside the safety chamber to the safety area
further comprising,
The ammonia supply system, characterized in that the discharge hole formed at one end of the leak-proof exterior of the ammonia supply pipe is located inside the safety chamber.

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