KR102161113B1 - Ammonia tank container and gas ammonia supply method using the same - Google Patents

Abstract

The present invention relates to an ammonia tank container and a gaseous ammonia supplying method using the same. The present invention discloses the ammonia tank container (10), comprising: a tank unit (100) in which liquid ammonia is accommodated; a support frame unit (200) installed on the outer surface of the tank unit (100) in order to support the tank unit (100); a heat medium passage unit (300) installed on the outer circumferential surface of the tank unit (100) and forming a passage through which a heat medium for vaporizing the liquid ammonia contained in the tank unit (100) flows; a heat medium sump unit (400) receiving the heat medium supplied to the heat medium passage unit (300); a heater unit (800) raising a temperature of the heat medium accommodated in the heat medium sump unit (400); a circulation pump unit (500) circulating the heat medium between the heat medium passage unit (300) and the heat medium sump unit (400); a gaseous ammonia supply line (600) coupled to an upper side of the tank unit (100) in order to supply the gaseous ammonia vaporized in the tank unit (100) to an external facility; and a control unit controlling operation of the heater unit (800) and the circulation pump unit (500) in order to supply the gaseous ammonia through the gaseous ammonia supply line (600) under preset pressure and temperature conditions.

Description

Ammonia tank container and gas ammonia supply method using the same}

The present invention relates to an ammonia tank container and a gaseous ammonia supply method using the same, and more particularly, to an ammonia tank container capable of transporting liquid ammonia using a tank container and supplying it in a gaseous state, and a gaseous ammonia supply method using the same.

In general, ammonia is widely used for heat treatment processes, refrigerants in freezing warehouses, or neutralization of power plants and incineration plants, and recently, the demand for ammonia is rapidly increasing as a special gas for semiconductor or LED processes.

In the case of ammonia used in a semiconductor or LED manufacturing process, high purity is required, and a great deal of care is required in generating ammonia gas and supplying the generated ammonia gas to the equipment.

Conventionally, a method using a y-cylinder is mainly used as a facility for supplying ammonia gas.

However, the ammonia gas supply facility using a y-cylinder has the advantage of supplying high-purity ammonia gas with a simple structure. However, in the case of semiconductor or LED manufacturing plants, the trend is increasing in scale. There is a problem that the ammonia gas cannot be supplied.

An object of the present invention is to provide an ammonia tank container capable of transporting a sufficient amount of liquid ammonia using a tank container and supplying it in a gaseous state, and a gaseous ammonia supply method using the same, in order to solve the above problems.

The present invention was created to achieve the object of the present invention as described above, and installed on the outer surface of the tank part 100 to support the tank part 100 in which liquid ammonia is accommodated, and the tank part 100 A heat medium flow path part 300 installed on an outer circumferential surface of the tank part 100 and forming a flow path through which a heat medium for vaporizing liquid ammonia contained in the tank part 100 flows, A heat medium sump part 400 for receiving a heat medium supplied to the heat medium flow path part 300, a heater part 800 for heating the heat medium received in the heat medium sump part 400, and the heat medium flow path part 300 And a circulation pump part 500 for circulating the heat medium between the heat medium sump part 400 and the upper side of the tank part 100 to supply gaseous ammonia vaporized in the tank part 100 to an external facility. The gaseous ammonia supply line 600 coupled to the gaseous ammonia supply line 600 and the heater unit 800 and the circulation pump unit 500 to supply gaseous ammonia in a preset pressure condition and temperature condition through the gaseous ammonia supply line 600 Disclosed is an ammonia tank container 10, characterized in that it comprises a control unit for controlling the operation of.

The ammonia tank container 10 may further include a temperature sensor unit 710 installed in the tank unit 100 to detect temperatures of gaseous ammonia and liquid ammonia.

The ammonia tank container 10 may further include a pressure sensor unit 720 that senses the pressure inside the tank unit 100.

The ammonia tank container 10 may further include a level sensor unit 730 for detecting a level of liquid ammonia contained in the tank unit 100.

The tank part 100 may be formed in a cylindrical shape and be supported by the support frame part 200 in a horizontal direction.

The heat medium flow path part 300 may be installed to correspond to the lower area of the tank part 100.

The heat medium flow path part 300 is installed at the lowermost part of the tank part 100 so that the heat medium flows in, and a heat medium inlet 310 branched to a pair of inlets 312, and the pair of inlets 312 In a symmetrical shape, a pair of heat transfer pipe portions 320 extending along both sides of the outer circumferential surface of the tank portion 100, and a heat medium outlet portion 330 provided at the ends of the pair of heat transfer pipe portions 320 from which the heat medium flows out It may include.

The ammonia tank container 10 may further include a heat medium temperature sensor unit 740 installed in the heat medium sump part 400 to sense the temperature of the heat medium.

The ammonia tank container 10 may further include a heat medium level sensor unit 750 for sensing a water level level of the heat medium accommodated in the heat medium sump part 400.

The ammonia tank container 10 may be an ISO tank container.

In another aspect, the present invention includes a tank portion 100 in which liquid ammonia is accommodated, a support frame portion 200 installed on an outer surface of the tank portion 100 to support the tank portion 100, and the tank A heat medium flow path part 300 installed on the outer circumferential surface of the part 100 and forming a flow path through which a heat medium for vaporizing liquid ammonia contained in the tank part 100 flows, and a heat medium supplied to the heat medium flow path part 300 A heat medium between the heat medium sump part 400 accommodating the heat medium sump part 400, the heater part 800 for heating the heat medium contained in the heat medium sump part 400, and the heat medium flow path part 300 and the heat medium sump part 400 A circulation pump unit 500 for circulating the gas, and a gaseous ammonia supply line 600 coupled to the upper side of the tank unit 100 to supply gaseous ammonia vaporized in the tank unit 100 to an external facility. Disclosed is a gaseous ammonia supply method using the ammonia tank container 10 including.

The gaseous ammonia supply method includes the heater unit 800 and the heater unit 800 and the gaseous ammonia supply line 600 to stably supply gaseous ammonia to a required flow rate under a pressure condition and a temperature condition set in advance according to a user's requirement. The operation of the circulation pump unit 500 may be controlled.

The gaseous ammonia supply method includes indirect heating of indirect heating of the liquid ammonia accommodated in the tank unit 100 through the heat medium flow path unit 300 so that the liquid ammonia accommodated in the tank unit 100 is vaporized into gaseous ammonia. A step and a gaseous ammonia supply step of supplying the gaseous ammonia vaporized in the tank unit 100 to the outside through the gaseous ammonia supply line 600.

The gaseous ammonia supply method includes the pressure and temperature of the gaseous ammonia of the tank 100, the level of the liquid ammonia of the tank 100, the temperature of the liquid ammonia of the tank 100, and the heater 800), the operation state determination step of determining whether the operation state is good based on the control element including at least one of the temperature of the heat medium of the heat medium sump unit 400 and the water level, and the operation state is abnormal If it is determined to be in the state, an operation blocking step of blocking at least one of the heater unit 800 and the circulation pump unit 500 may be included.

The ammonia tank container and gaseous ammonia supply method using the same according to the present invention has the advantage of being able to transport a sufficient amount of liquid ammonia using the tank container and supply it in a gaseous state.

In particular, the present invention can supply a large amount of ammonia at a time by transporting an ISO standard tank to a place where ammonia should be supplied using a trailer, thereby minimizing the ammonia transfer cycle, and indirectly heating the liquid ammonia contained in the tank. The liquid ammonia can be vaporized in a way that allows gaseous ammonia to be supplied directly from the tank to external equipment, which has the advantage of greatly improving the convenience of equipment operation.

In addition, the ammonia tank container and the gaseous ammonia supply method using the same according to the present invention are based on the state of various facilities inside, the level/temperature/pressure condition of ammonia, the level/temperature condition of the heat medium for heating liquid ammonia. By introducing various operation control methods according to the driving situation, there is an advantage of stably and safely supplying gaseous ammonia, which requires attention in handling due to the risk of explosion, to external facilities.

1 is a conceptual diagram showing a state in which an ammonia tank container according to the present invention is transported through a trailer.
2A to 2D are a plan view, a bottom view, a front view, and a rear view of the ammonia tank container of FIG. 1.
3 is a conceptual diagram illustrating the configuration and operation relationship of the ammonia tank container of FIG. 1.
4A to 4B are views showing a part of the configuration of the ammonia tank container of FIG. 1.
5 is a table showing a control method for each operating state of the ammonia tank container of FIG. 1.

Hereinafter, an ammonia tank container according to the present invention will be described in detail with reference to the accompanying drawings.

Ammonia tank container 10 according to the present invention, as shown in Figs. 1 to 4B, the tank unit 100 in which liquid ammonia is accommodated, and the tank unit 100 to support the tank unit 100 ) A support frame part 200 installed on the outer surface, and a heat medium flow path part installed on the outer circumferential surface of the tank part 100 and forming a flow path through which a heat medium for vaporizing liquid ammonia contained in the tank part 100 flows (300), a heat medium sump part 400 for receiving a heat medium supplied to the heat medium flow path part 300, a heater part 800 for heating the heat medium received in the heat medium sump part 400, and the heat medium A circulation pump part 500 for circulating the heat medium between the flow path part 300 and the heat medium sump part 300, and the tank part for supplying gaseous ammonia vaporized in the tank part 100 to an external facility. The heater unit 800 and the circulation in order to supply gaseous ammonia in a preset pressure condition and temperature condition through the gaseous ammonia supply line 600 coupled to the upper side of the 100 and the gaseous ammonia supply line 600. It includes a control unit that controls the operation of the pump unit 500.

The ammonia tank container 10 according to the present invention is a facility for supplying high-purity gaseous ammonia required in a semiconductor or display manufacturing process in a large amount, and can be transported to various places using the tank lorry 20.

The ammonia tank container 10 may be an ISO tank container that satisfies ISO (International Organization for Standardization) standards for transporting liquid dangerous goods.

The tank unit 100 may have a configuration in which liquid ammonia is accommodated, and may have a sealed structure for transporting dangerous substances in a liquid state, and an insulator (eg, polyurethane) for heat insulation may be provided on an outer circumferential surface.

The tank unit 100, as shown in Figs. 1 to 3, is formed in a cylindrical shape in order to cope with the largest volume and overpressure inside the support frame unit 200 of a preset standard, and has both ends in the longitudinal direction. It can be made in a hemispherical shape.

As an example, the tank unit 100 may have a volume of 19,893L.

The tank unit 100 may be transported in a horizontal direction for stable support.

For stable operation, a maximum of 90% of liquid ammonia may be filled in the tank 100, and gaseous ammonia may be supplied to an external facility until 10% of the liquid ammonia remains.

In this case, the tank unit 100 may be provided with an inlet 102 for filling liquid ammonia and an outlet 104 for supplying gaseous ammonia to an external facility.

The inlet 102 may be connected to an external liquid ammonia supply facility through the liquid ammonia supply line 900, and the liquid ammonia supply valve 910 and the liquid ammonia supply in the event of an emergency are blocked. A liquid ammonia emergency shut-off valve 920 may be installed.

The support frame part 200 is a support structure installed on the outer surface of the tank part 100 to support the tank part 100 and may have various configurations.

As an example, the support frame part 200 may be a rectangular exoskeleton frame having a preset width, length, and height according to ISO standards, as shown in FIG. 1, and the inner space of the support frame part 200 The tank unit 100 may be installed and supported.

The heat medium flow path part 300 is installed on the outer circumferential surface of the tank part 100 and forms a flow path through which a heat medium flows for vaporizing liquid ammonia accommodated in the tank part 100, and various configurations are possible.

The heat medium flowing along the heat medium passage part 300 flows along the outer circumferential surface of the tank part 100 and may exchange heat with liquid ammonia in the tank part 100.

As the heat medium transfers heat to the liquid ammonia, the liquid ammonia may be indirectly heated and vaporized, thereby transforming the phase into gaseous ammonia.

The heat medium may be a variety of fluids if stable heat transfer to liquid ammonia is possible, and for example, a fluid (EG Water) in which ethylene glycol and water are mixed in a certain ratio may be used as the heat medium.

The heat medium flow path part 300 may be installed in close contact along the outer circumferential surface of the tank part 100, and more specifically, as shown in FIGS. 3 and 4B, the entire outer circumferential surface of the tank part 100 is It is preferable that it is installed in correspondence with the lower area of the tank 100.

As an example, the heat medium flow path part 300 is installed at the lowermost part of the tank part 100, as shown in FIGS. 4A to 4B, so that the heat medium flows in, and a heat medium inlet part branched into a pair of inlets 312 310 and a pair of heat transfer pipe parts 320 extending along both sides of the outer circumferential surface of the tank 100 in a symmetrical shape from the pair of inlets 312, and provided at the ends of the pair of heat transfer pipe parts 320 It may include a heat medium outlet 330 through which the heat medium is discharged.

The heat medium inlet 310 is installed at the lowermost part of the tank 100 to allow the heat medium to flow in and diverge into a pair of inlets 312, and various configurations are possible.

The heat medium inlet 310 may be installed at the lowermost part of the tank part 100 supported in a horizontal direction, as shown in FIG. 4A, and in particular, the central part of the lowermost part of the tank part 100 It is preferable to install it off the lengthwise end side.

The pair of heat transfer pipe portions 320 may be of various shapes as a pair of pipes extending along both sides of the outer circumferential surface of the tank portion 100 in a symmetrical shape from the pair of inlets 312.

As an example, the pair of heat transfer pipe parts 320, as shown in FIG. 4A, reciprocate along the longitudinal direction of the tank part 100 and extend in a direction from the lowermost part to the upper part of the tank part 100. It can be formed in a pattern.

At this time, at a point where the flow direction of the heat medium flowing along the zigzag pattern of the heat transfer pipe part 320 changes (on both ends of the tank part 100), a connection pipe part 322 for communicating the heat medium may be installed.

An air vent 323 for discharging the air generated inside the heat transfer pipe part 320 to the outside may be installed at an appropriate point among the connection pipe part 322 as shown in FIG. 4A.

When a plurality of connection pipe parts 322 are installed according to the pattern of the heat transfer pipe part 320, the plurality of connection pipe parts 322 are positions deviated from each other so as not to interfere with each other in order to minimize the gap between adjacent heat transfer pipe parts 320 It is preferably installed in.

Through this, there is an advantage of increasing the heat transfer efficiency by maximizing the heat transfer area through the heat transfer pipe part 320.

In addition, the heat transfer pipe part 320 is a method for maximizing the heat transfer area, and may be formed in a semicircular shape in which the cross section is in surface contact with the outer circumferential surface of the tank part 100 as shown in FIG. 4B.

One of the pair of heat transfer pipe parts 320 is formed along one side (A) based on a center line (L) parallel to the longitudinal direction of the tank part 100 in a plane, and is formed along one side surface of the tank part 100 In (A), the liquid ammonia is indirectly heated, and the other side of the pair of heat transfer pipe parts 320 is the other side (B) based on the center line (L) parallel to the longitudinal direction of the tank part 100 on a plane. The liquid ammonia can be indirectly heated on the other side (B) of the tank 100 by being formed along the line.

At this time, it goes without saying that the pair of heat transfer pipe parts 320 may be formed in a symmetrical shape based on a center line L parallel to the longitudinal direction of the tank part 100 in a plan view.

Through this, it is possible to uniformly heat the liquid ammonia accommodated in the tank unit 100.

On the other hand, the heat transfer pipe part 320, as shown in Figure 4b, to be configured to cover up to the height reference center of the tank part 100 ascending on the outer circumferential surface of the tank part 100 from the lowermost part of the tank part 100 I can.

As the gaseous ammonia is continuously supplied to an external facility, the level of liquid ammonia contained in the tank unit 100 is gradually lowered, so that the heat transfer pipe unit 320 does not cover the entire outer circumferential surface of the tank unit 100 Even if it covers only from the lower part to the center part of 100), sufficient heat transfer to liquid ammonia may be possible.

The heat transfer area of the heat transfer pipe part 320 specifically required to vaporize the liquid ammonia inside the tank part 100 into gaseous ammonia at a preset temperature may be calculated as follows.

The inner diameter of the tank part 100 is Di, the length of the straight part (S) of the tank part 100 (Tan to Tan length) is Lt, and the volume of the two head parts (H) at both ends of the tank part 100 In the case of V, the internal volume of the tank 100 calculated through this may be assumed to be Vo.

At this time, when the gaseous ammonia flow rate F (SLPM, kg/min, kg/hr) required by the user is determined, taking into account the latent heat of liquid ammonia (291.8 kcal/kg, SRK@130 psig VP=1 (24.8°C)), Heat load Q1 (heat duty, kcal/hr, kw) to be supplied to the liquid ammonia inside the tank unit 100 may be calculated to supply gaseous ammonia at a corresponding flow rate.

When the heat transfer rate (U value) of the heat transfer pipe part 320 is U (kcal/hr·m2·℃) and the log mean temperature difference (LMTD) is D (℃), the heat transfer area required for vaporization of liquid ammonia at the flow rate F Areq Can be calculated as in Equation 1 below.

[Equation 1]

(m²)Areq =

(m ² )

When the heat transfer area Areq required for vaporization of the liquid ammonia of the flow rate F is determined, the heat transfer pipe part 320 has the length, number, and tank part 100 to have a heat transfer area larger than Areq (for example, an area as large as 125% of Areq). A contact area, a cross-sectional shape, and a cross-sectional area DA in contact with the may be determined.

As an example, the heat transfer pipe part 320 is formed in a trapezoidal shape in order to secure a heat transfer area, so that the long side aa of the trapezoid is in close contact with the outer circumferential surface of the tank part 100, as shown in FIG. , It can be extended in a zigzag pattern within a preset section length (RL) to have a heat transfer area of 1.25 times the heat transfer area Areq required for vaporization of liquid ammonia at a flow rate F.

On the other hand, the heat transferred to the liquid ammonia through the heat transfer pipe part 320 is initially used to raise the temperature of the liquid ammonia (for example, -20°C) to a temperature at which it vaporizes (for example, 28°C). Before supplying ammonia, it may take a heating time for raising the temperature of the liquid ammonia to a temperature at which it vaporizes. This heating time may vary depending on the heat load for raising the temperature of the liquid ammonia to a desired temperature, or the heat transfer capability through the heat transfer pipe part 320.

The heat medium outlet portion 330 is provided at the ends of the pair of heat transfer pipe portions 320 to allow various configurations to flow out the heat medium.

The heat medium outlet 330 may be configured to be in communication with both ends of the pair of heat transfer pipe portions 320 so that the heat medium flowing out from the pair of heat transfer pipe portions 320 is combined and discharged at a time.

The heat medium outlet 330 is preferably located on the other side opposite to the heat medium inlet 310 for heat transfer efficiency.

More specifically, the heat medium outlet 330 may be installed on the other side of the heat medium inlet 310 with the heat transfer pipe part 320 interposed therebetween, as shown in FIG. 4A.

On the other hand, the flow rate of the heat medium that needs to be circulated through the heat medium flow path part 300 and the heater capacity required for the heater part 800 to be described later for heating the circulating heat medium are introduced through the heat medium inflow part 310. It may be calculated based on the temperature T1 of the heat medium and the temperature T2 of the heat medium discharged through the heat medium outlet 330.

The heat medium sump part 400 may be configured as a sump (SUMP) for receiving the heat medium supplied to the heat medium flow path part 300.

The heat medium sump part 400 supplies the received heat medium to the heat medium flow path part 300 and may store the heat medium flowing out through the heat medium discharge part 330 of the heat medium flow path part 300.

The heat medium sump part 400 communicates with the heat medium inlet part 310 of the heat medium flow path part 300 to communicate with the heat medium outlet 402 through which the heat medium flows out and the heat medium outlet 330 of the heat medium flow path part 300. A heat medium chain let 404 into which the heat medium is introduced may be provided.

The heat medium outlet 402 and the heat medium chainlet 404 may be provided with a ball valve 405, and in particular, a strainer 407 for removing foreign substances from the heat medium may be additionally installed on the heat medium outlet 402 side.

The heater part 800 is a heating means for raising the temperature of the heat medium accommodated in the heat medium sump part 400 and may have various configurations.

As shown in FIG. 3, the heater unit 800 may include a plurality of heaters 810 and 820 for uniform heating.

The circulation pump part 500 is a pump for circulating the heat medium between the heat medium flow passage part 300 and the heat medium sump part 400, and various configurations are possible, and a detailed description thereof will be omitted since a known pump may be applied. .

The circulation pump unit 500 may be installed on a flow path of the heat medium between the heat medium outlet 402 of the heat medium sump part 400 and the heat medium inlet 310 of the heat medium flow passage part 300.

Between the circulation pump part 500 and the heat medium inlet 310 of the heat medium flow path part 300, a flow control valve 510 for adjusting the flow rate of the heat medium in the heat medium flow path part 300 may be installed. .

The flow control valve 510 may be connected to an instrumented air line I.A of an external facility and controlled through a pneumatic signal through an instrumented air line I.A.

In addition, the flow control valve 510 may be provided with a bypass valve 512 connecting the inlet and the outlet of the flow control valve 510, and the heat medium sump unit 400 at the outlet of the circulation pump unit 500 A minimum flow valve 520 to allow the heating medium to flow may be installed.

Through this, the heat medium flowing out through the heat medium outlet 402 of the heat medium sump part 400 sequentially passes through the circulation pump part 500 and the flow control valve 510, and the heat medium inlet 310 of the heat medium flow path part 300 ), flows along the outer circumferential surface of the tank unit 100 through the heat transfer pipe unit 320, flows out through the heat medium outlet 330, and flows back into the heat medium chainlet 404 of the heat medium sump unit 400. Can be cycled in a way.

The gaseous ammonia supply line 600 may have various configurations as a gas supply pipe coupled to the upper side of the tank 100 in order to supply the gaseous ammonia vaporized in the tank 100 to an external facility.

The gaseous ammonia may be supplied to external equipment at a required flow rate per unit time through the gaseous ammonia supply line 600.

The gaseous ammonia supply line 600 may be coupled to a bulk special gas supply system (BSGS) for manufacturing a semiconductor or display.

More specifically, the gaseous ammonia supply line 600 is coupled to the outlet 104 of the tank unit 100 and connected to an external facility such as BSGS to supply gaseous ammonia to an external facility, and the gaseous ammonia supply line ( The gaseous ammonia supply valve 620 and the gaseous ammonia emergency shut-off valve 630 for urgently shutting off the supply of gaseous ammonia may be installed in the 600).

The gaseous ammonia emergency shut-off valve 630 may be connected to an instrumented air line I.A of an external facility and controlled through a pneumatic signal through the instrumented air line I.A.

In addition, the gaseous ammonia supply line 600 may be provided with a heating wire 610 and a thermal insulation protection member (not shown) along a piping line to prevent re-liquefaction of gaseous ammonia.

Meanwhile, the ammonia tank container 10 may further include a temperature sensor unit 710 installed in the tank unit 100 to detect temperatures of gaseous ammonia and liquid ammonia.

The temperature sensor unit 710 may be configured as a contact type, non-contact type, or various temperature sensors such as RTD or TC, as long as the temperature of liquid ammonia and gaseous ammonia can be sensed.

The temperature sensor unit 710 includes a first temperature sensor unit 712 installed above the tank unit 100 to detect a temperature of gaseous ammonia in the tank unit 100, and a lower portion of the tank unit 100 It may include a second temperature sensor unit 714 installed in the tank unit 100 to detect the temperature of the liquid ammonia.

In addition, the ammonia tank container 10 may further include a pressure sensor unit 720 for sensing the pressure inside the tank unit 100.

The pressure sensor unit 720 may be configured with various types of pressure sensors as long as it can measure the pressure inside the tank unit 100 by gaseous ammonia generated according to the saturation temperature of the liquid ammonia.

In addition, the ammonia tank container 10 may further include a level sensor unit 730 that detects the level of the liquid ammonia contained in the tank unit 100.

The level sensor unit 730 may be configured as a level sensor of various types, such as optical/ultrasonic/pressure type, as long as it can continuously or discontinuously detect the level of the liquid ammonia contained in the tank unit 100.

In addition, the ammonia tank container 10 may further include a heat medium temperature sensor unit 740 installed on the heat medium sump unit 400 to sense the temperature of the heat medium.

The heating medium temperature sensor unit 740 may be configured as a contact type, non-contact type, or various temperature sensors such as RTD or TC, as long as the temperature of the heating medium stored in the heating medium sump unit 400 can be sensed.

In addition, the ammonia tank container 10 may further include a heat medium level sensor unit 750 for sensing the water level of the heat medium accommodated in the heat medium sump part 400.

The heat medium level sensor unit 750 may be composed of various types of level sensors such as optical/ultrasonic/pressure type, as long as it can continuously or discontinuously detect the water level of the heat medium accommodated in the heat medium sump unit 400. .

In addition, the ammonia tank container 10 is installed in the tank part 100 to discharge gaseous ammonia inside the tank part 100 to the outside when the pressure inside the tank part 100 rises above a preset design pressure. One or more safety valves 110 may be additionally included.

The control unit is a control means for controlling the operation of the heater unit 800 and the circulation pump unit 500 in order to supply gaseous ammonia in a preset pressure condition and temperature condition through the gaseous ammonia supply line 600, and has various configurations. It is possible.

Hereinafter, the operation of the control unit will be described in detail along with a method of supplying gaseous ammonia using the ammonia tank container 10 including the above-described configuration.

First, in the gaseous ammonia supply method, the ammonia tank container 10 filled with liquid ammonia using the tank lorry 20 (90% of the maximum capacity of the tank 100) is placed in a gaseous ammonia supply place (external The moving step of moving to the place where the facility is installed), the installation step of connecting the gaseous ammonia supply line 600 of the tank container 10 to the external equipment at the gaseous ammonia supply site, and the external through the gaseous ammonia supply line 600 A supply step of supplying gaseous ammonia to the facility, a termination step of stopping gaseous ammonia supply when the remaining liquid ammonia in the tank unit 100 falls below a preset standard, and a gaseous ammonia supply line of the tank container 10 ( 600) and the disconnection step of disconnecting the external equipment.

The tank lorry 20 may be located at the gaseous ammonia supply location as the tank container 10 is installed, and a scale for measuring the amount of liquid ammonia remaining in the tank container 10 on the support surface of the tank lorry 20 (scale) can be installed. Once the tank lorry 20 arrives at the gaseous ammonia supply site, mass measurement may be performed through a scale.

The installation step includes not only connecting the gaseous ammonia supply line 600 with external equipment, but also connecting electrical equipment such as an instrumented air line (IA) or a power box of the external equipment to the tank container 10. can do.

In the installation step, the open/close state of each valve installed in the tank container 10 can be checked, and if there is no abnormality after the valve open/close state is checked, the gaseous ammonia supply line 600, the instrumented air line (IA), and electricity The connection to the installation can be carried out.

After the gaseous ammonia supply line 600 is connected to the BSGS of an external facility, power may be supplied to the heating wire 610 of the gaseous ammonia supply line 600 for a predetermined time.

The supplying step is a supply step of supplying gaseous ammonia to an external facility through the gaseous ammonia supply line 600, and a heater to supply gaseous ammonia in a preset pressure condition and temperature condition through the gaseous ammonia supply line 600. The operation of the unit 800 and the circulation pump unit 500 may be controlled. Operation control of the heater unit 800 and the circulation pump unit 500 through the control unit may be achieved by transmitting a control signal through an electric signal line indicated by a dotted line in FIG. 3.

Specifically, the supplying step includes an indirect heating step of indirectly heating the liquid ammonia accommodated in the tank unit 100 through the heat medium passage unit 300 so that the liquid ammonia accommodated in the tank unit 100 is vaporized into gaseous ammonia. , It may include a gaseous ammonia supply step of supplying the gaseous ammonia vaporized in the tank 100 to the outside through the gaseous ammonia supply line 600.

In the indirect heating step, the heat medium may be circulated through the heat medium flow passage part 300 by operating the circulation pump part 500.

In this case, in the indirect heating step, the circulation pump unit 500 may be operated in a preset temperature range. That is, in the indirect heating step, the control unit may operate the circulation pump unit 500 when the temperature of the heat medium is lower than the lower limit of the preset temperature range, and stop the operation of the circulation pump unit 500 when the temperature is higher than the upper limit.

Of course, this temperature range may vary depending on the operating conditions.

In addition, in the indirect heating step, the heater unit 800 may be operated in a preset temperature range.

That is, in the indirect heating step, the control unit may operate the heater unit 800 when the temperature of the heat medium is lower than the lower limit of the preset temperature range, and stop the operation of the heater unit 800 when the temperature is higher than the upper limit. Of course, this temperature range may vary depending on the operating conditions.

At this time, the control unit may operate the heater unit 800 only in the operating state of the circulation pump unit 500. In addition, the control unit may operate the circulation pump unit 500 and the heater unit 800 after checking whether the level of the liquid ammonia of the tank unit 100 and the level of the heating medium level of the heat medium sump unit 400 are appropriate. .

By the operation of the heater unit 800 and the circulation pump unit 500 by the control unit, the liquid ammonia contained in the tank unit 100 is indirectly heated and vaporized into gaseous ammonia, thereby increasing the pressure inside the tank unit 100. I can.

The gaseous ammonia may be supplied to an external facility through the gaseous ammonia supply line 600 under preset pressure, flow rate, and temperature conditions according to the operation control of the heater unit 800 and the circulation pump unit 500 through a control unit.

When the supply of gaseous ammonia is completed through the supplying step (for example, the residual amount of liquid ammonia in the tank 100 reaches 10%), a terminating step of stably stopping gaseous ammonia supply may be performed.

In the end step, the control unit may stop the operation of the heater unit 800 and the circulation pump unit 500, and the gaseous ammonia supply valve 620 and the gaseous ammonia emergency shutoff valve 630 for supplying gaseous ammonia are closed. The ammonia supply can be cut off.

After the supply of gaseous ammonia is cut off, a release step of releasing the connection between the gaseous ammonia supply line 600 of the tank container 10 and external equipment may be performed.

In the release step, the gaseous ammonia supply line 600 and external equipment may be removed, and power supply may be cut off by separating the power cable.

However, in the case of ammonia, which is a flammable dangerous substance, the gaseous ammonia supply method according to the present invention is an operation to determine whether the operation state of the ammonia tank container 10 is good in order to ensure facility safety in an abnormal operation state. A state determination step and an operation blocking step of blocking the operation of at least one of the heater unit 800 and the circulation pump unit 500 when it is determined that the operation state is an abnormal state may be further included.

In the operation state determination step, the pressure and temperature of gaseous ammonia in the tank unit 100, the level of liquid ammonia in the tank unit 100, the temperature of the liquid ammonia in the tank unit 100, and the temperature of the heater unit 800 , It may be determined whether or not the operation state is good based on a control element including at least one of the temperature and water level of the heat medium of the heat medium sump unit 400.

The control element may be measured through the above-described temperature sensor unit 710, pressure sensor unit 720, level sensor unit 730, heat medium temperature sensor unit 740, and heat medium level sensor unit 750. .

Hereinafter, the operation of the heater unit 800 and the circulation pump unit 500 according to the operation state determination step and the operation blocking step will be described in detail with reference to FIG. 5.

In the first case, in the operation state determination step, when the pressure of gaseous ammonia inside the tank unit 100 is greater than a preset set value, it may be determined that the operation state is an abnormal state.

In the second case, in the operation state determination step, when the temperature of gaseous ammonia inside the tank unit 100 is greater than a preset set value, it may be determined that the operation state is an abnormal state.

In the third case, in the operation state determination step, when the temperature of the liquid ammonia in the tank 100 is greater than a preset set value, it may be determined that the operation state is an abnormal state.

In the case of the first case to the third case, in the operation blocking step, the control unit blocks the operation of the circulation pump unit 500, blocks the operation of the heater unit 800, and closes the flow control valve 510 (closed). ), and accordingly, it is possible to prevent the pressure/temperature of gaseous ammonia and the temperature of liquid ammonia in the tank 100 from exceeding the set value. In addition, it is possible to warn of an abnormal state through an alarm lamp (not shown) provided in the tank container 10.

Next, in the fourth and fifth cases, the operation state determination step is when the temperature of the heater unit 800, specifically, the temperature of each of the plurality of heaters 810 and 820, is greater than a preset set value. It can be determined that the operating state is an abnormal state.

In the case of the fourth to fifth cases, in the operation blocking step, the controller may block the operation of the heaters 810 and 820 that are larger than a set value among the plurality of heaters 810 and 820.

Next, in the sixth case, in the operation state determination step, when the temperature of the heat medium stored in the heat medium sump unit 400 is greater than a preset set value, it may be determined that the operating state is an abnormal state.

In the case of the sixth case, in the operation blocking step, the controller may block the operation of the circulation pump unit 500, block the operation of the heater unit 800, and close (close) the flow control valve 510, and Accordingly, it is possible to prevent the temperature of the heat medium stored in the heat medium sump unit 400 from exceeding the set value. In addition, it is possible to warn of an abnormal state through an alarm lamp (not shown) provided in the tank container 10.

Next, in the seventh case, in the operation state determination step, when the water level of the heat medium stored in the heat medium sump unit 400 becomes smaller than a preset set value, it may be determined that the operating state is an abnormal state.

In the case of the seventh case, in the operation blocking step, the control unit may block the operation of the circulation pump unit 500, the operation of the heater unit 800, and an alarm lamp (not shown) provided in the tank container 10. ) To warn that it is in an abnormal state.

Next, in the eighth case, in the operation state determination step, when the water level of the heat medium stored in the heat medium sump unit 400 is greater than a preset set value but reaches a threshold value close to the set value, the operation state is abnormal. It can be determined to be.

In the case of the eighth case, the control unit warns of an abnormal state through an alarm lamp (not shown) provided in the tank container 10 while maintaining the operation of the circulation pump unit 500 or the heater unit 800. I can.

Finally, in the ninth and tenth cases, in the operation state determination step, the level of the liquid ammonia stored in the tank 100 is lower than a preset lower limit (for example, 10% residual amount) or a preset upper limit ( For example, if it is higher than 85% remaining amount), it can be determined that the operating state is abnormal.

In the case of the ninth and tenth cases, the control unit maintains the operation of the circulation pump unit 500 or the heater unit 800, and an alarm lamp (not shown) provided in the tank container 10 You can warn that it is in a state.

Meanwhile, the gaseous ammonia supply method according to the present invention may include an emergency stop step capable of responding to a power outage or a failure of the instrumented air line (I.A) in addition to the operation state determination step and operation blocking step described above.

For example, in the emergency stop step, when the power supply to the tank container 10 is cut off (power failure), the operation of the circulation pump unit 500 and the heater unit 800 is stopped, and the flow control valve 510 and the gaseous ammonia emergency The shutoff valve 630 may be FC (fail closed).

As another example, in the emergency stop step, if pressure is not supplied from the instrumented air line IA to the flow control valve 510, the flow control valve 510 may fail closed (FC). When the flow control valve 510 is FC (fail closed), the heat medium may be configured to self-circulate the heat medium sump unit 400 and the circulation pump unit 500.

As another example, in the emergency stop step, if pressure is not supplied from the instrumented air line I.A to the gaseous ammonia emergency shutoff valve 630, the gaseous ammonia emergency shutoff valve 630 may fail closed (FC). When the gaseous ammonia emergency shut-off valve 630 is failed closed (FC), the pressure of the gaseous ammonia in the tank 100 may increase. In this case, the operation of the circulation pump unit 500 and the heater unit 800 may be blocked according to the above-described first case, and the flow control valve 510 may be closed (closed).

In the case of the gas phase ammonia supply method according to the present invention, the operation of the heater unit 800 and the circulation pump unit 500 is controlled by dividing the operation state based on the control element as well as power failure and instrumentation air line into several cases. By doing so, there is an advantage that a large amount of gaseous ammonia can be safely and stably supplied under any circumstances.

Since the above is only described with respect to some of the preferred embodiments that can be implemented by the present invention, as well known, the scope of the present invention should not be limited to the above embodiments and should not be interpreted. It will be said that both the technical idea and the technical idea together with the fundamental are included in the scope of the present invention.

10: ammonia tank container 20: tank lorry

Claims (12)

As an ammonia tank container (10),
A tank unit 100 in which liquid ammonia is accommodated; A support frame part 200 installed on the outer surface of the tank part 100 to support the tank part 100; A heat medium flow path part 300 installed on an outer circumferential surface of the tank part 100 and forming a flow path through which a heat medium for vaporizing liquid ammonia contained in the tank part 100 flows; A heat medium sump part 400 for receiving a heat medium supplied to the heat medium flow path part 300; A heater part 800 for raising the temperature of the heat medium contained in the heat medium sump part 400; A circulation pump part 500 for circulating the heat medium between the heat medium flow path part 300 and the heat medium sump part 400; A gaseous ammonia supply line 600 coupled to the tank 100 to supply gaseous ammonia vaporized in the tank 100 to an external facility, and coupled to the external facility; A liquid ammonia supply line 900 connected to an external liquid ammonia supply facility to fill the liquid ammonia into the tank unit 100; A control unit for controlling the operation of the heater unit 800 and the circulation pump unit 500 to supply gaseous ammonia at a pressure condition, a temperature condition, and a flow rate per unit time through the gaseous ammonia supply line 600. Includes,
The gaseous ammonia supply line 600 includes a heating wire 610, a gaseous ammonia supply valve 620, and a gaseous ammonia emergency shutoff valve 630 along a piping line to prevent gaseous ammonia from being reliquefied. ) Is installed,
Between the circulation pump part 500 and the heat medium inlet part 310, a flow control valve 510 for adjusting the flow rate of the heat medium in the heat medium passage part 300 is installed,
The ammonia tank container 10 is an ISO tank container that satisfies the ISO standard for transporting liquid ammonia, and after the liquid ammonia is filled in the liquid ammonia supply facility, it is transported to the gaseous ammonia supply site by the tank lorry 20, The gaseous ammonia is supplied to the external facility while being installed in the tank lorry 20 at the gaseous ammonia supply location,
At the gaseous ammonia supply site, the ammonia tank container 10 is connected to the power box of the external facility for power supply,
The gaseous ammonia emergency shutoff valve 630 and the flow control valve 510 at the gaseous ammonia supply location are connected to the instrumented air line IA of the external facility,
The control unit,
When the power supply through the POWER BOX is cut off, the operation of the circulation pump unit 500 and the heater unit 800 is stopped, and the flow control valve 510 and the gaseous ammonia emergency shutoff valve 630 are FC (fail closed),
When pressure is not supplied to the flow control valve 510 through the instrumentation air line IA, the flow control valve 510 is FC (fail closed), and the heat medium is the heat medium sump unit 400 and the circulation pump. Controls the part 500 to self-circulate,
When pressure is not supplied to the gaseous ammonia emergency shutoff valve 630 through the instrumented air line IA, the gaseous ammonia emergency shutoff valve 630 is FC (fail closed), and the gaseous ammonia of the tank unit 100 When the pressure of is greater than a preset set value, it is determined that the operation state is abnormal, and the operation of the circulation pump unit 500 and the heater unit 800 is blocked, and the flow control valve 510 is closed. Ammonia tank container made of (10). The method according to claim 1,
The ammonia tank container 10 further comprises a temperature sensor unit 710 installed in the tank unit 100 to detect temperatures of gaseous ammonia and liquid ammonia. The method according to claim 1,
The ammonia tank container 10 further comprises a pressure sensor part 720 for sensing the pressure inside the tank part 100. The method according to claim 1,
The ammonia tank container 10 further comprises a level sensor unit 730 for sensing the level of the liquid ammonia contained in the tank unit 100. The ammonia tank container 10. The method according to claim 1,
The tank part 100 is formed in a cylindrical shape and is supported by the support frame part 200 in a state lying down in a horizontal direction,
The ammonia tank container (10), characterized in that the heat medium flow path part (300) is installed to correspond to the lower region of the tank part (100). The method of claim 5,
The heat medium flow path part 300 is installed at the lowermost part of the tank part 100 so that the heat medium flows in, and a heat medium inlet 310 branched to a pair of inlets 312, and the pair of inlets 312 In a symmetrical shape, a pair of heat transfer pipe portions 320 extending along both sides of the outer circumferential surface of the tank portion 100, and a heat medium outlet portion 330 provided at the ends of the pair of heat transfer pipe portions 320 from which the heat medium flows out Ammonia tank container (10), characterized in that it comprises a. The method according to claim 1,
The ammonia tank container 10 further comprises a heat medium temperature sensor unit 740 installed on the heat medium sump unit 400 to sense the temperature of the heat medium. The method of claim 7,
The ammonia tank container 10 further comprises a heat medium level sensor unit 750 for sensing the water level of the heat medium accommodated in the heat medium sump part 400. The ammonia tank container 10. delete A tank unit 100 in which liquid ammonia is accommodated; A support frame part 200 installed on the outer surface of the tank part 100 to support the tank part 100; A heat medium flow path part 300 installed on an outer circumferential surface of the tank part 100 and forming a flow path through which a heat medium for vaporizing liquid ammonia contained in the tank part 100 flows; A heat medium sump part 400 for receiving a heat medium supplied to the heat medium flow path part 300; A heater part 800 for raising the temperature of the heat medium contained in the heat medium sump part 400; A circulation pump part 500 for circulating the heat medium between the heat medium flow path part 300 and the heat medium sump part 400; Claims 1 to 8 including a gaseous ammonia supply line 600 coupled to the tank 100 to supply gaseous ammonia vaporized in the tank 100 to an external facility, and coupled to the external facility. As a gas phase ammonia supply method using the ammonia tank container 10 according to any one of,
The gaseous ammonia supply method includes the heater unit 800 and the circulation pump unit 500 to supply gaseous ammonia at a preset pressure condition, temperature condition, and flow rate per unit time through the gaseous ammonia supply line 600. Gas-phase ammonia supply method, characterized in that for controlling the operation of. The method of claim 10,
The gaseous ammonia supply method,
An indirect heating step of indirectly heating the liquid ammonia accommodated in the tank unit 100 through the heat medium flow path unit 300 so that the liquid ammonia accommodated in the tank unit 100 is vaporized into gaseous ammonia;
And a gaseous ammonia supply step of supplying the gaseous ammonia vaporized in the tank 100 to the outside through the gaseous ammonia supply line 600. The method of claim 11,
The gaseous ammonia supply method,
The pressure and temperature of gaseous ammonia in the tank part 100, the level of the liquid ammonia in the tank part 100, the temperature of the liquid ammonia in the tank part 100, the temperature of the heater part 800, the heat medium An operation state determination step of determining whether or not the operation state is good based on a control element including at least one of the temperature and water level of the heat medium of the sump unit 400, and when it is determined that the operation state is abnormal, the heater And an operation blocking step of blocking the operation of at least one of the unit 800 and the circulation pump unit 500.

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