CN112013269B - Ammonia storage tank container and gaseous ammonia supply method using same - Google Patents

Ammonia storage tank container and gaseous ammonia supply method using same Download PDF

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Publication number
CN112013269B
CN112013269B CN201911346434.6A CN201911346434A CN112013269B CN 112013269 B CN112013269 B CN 112013269B CN 201911346434 A CN201911346434 A CN 201911346434A CN 112013269 B CN112013269 B CN 112013269B
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Prior art keywords
storage tank
heat medium
ammonia
gaseous ammonia
gaseous
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CN201911346434.6A
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CN112013269A (en
Inventor
安绪峻
姜信永
李相玟
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Yuanyi Semiconductor Materials Co ltd
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Yuanyi Semiconductor Materials Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/08—Mounting arrangements for vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/12—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for thermal insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/021—Special adaptations of indicating, measuring, or monitoring equipment having the height as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/08—Mounting arrangements for vessels
    • F17C13/083—Mounting arrangements for vessels for medium-sized mobile storage vessels, e.g. tank vehicles or railway tank vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0329—Foam
    • F17C2203/0333—Polyurethane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0302—Heat exchange with the fluid by heating
    • F17C2227/0304—Heat exchange with the fluid by heating using an electric heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0302—Heat exchange with the fluid by heating
    • F17C2227/0309—Heat exchange with the fluid by heating using another fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/05—Applications for industrial use

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The present invention relates to an ammonia storage tank container and a gaseous ammonia supply method using the same. The invention discloses an ammonia storage tank container, comprising: a storage tank unit for storing liquid ammonia; a support frame part arranged on the outer surface of the storage tank part to support the storage tank part; a heat medium passage portion provided on an outer peripheral surface of the storage tank portion and forming a passage for flowing a heat medium for vaporizing the liquid ammonia stored in the storage tank portion; a heat medium reservoir portion that stores the heat medium supplied to the heat medium passage portion; a heating unit for raising the temperature of the thermal medium stored in the thermal medium storage tank; a circulating pump section for circulating the heat medium between the heat medium passage section and the heat medium reservoir section; a gaseous ammonia supply line coupled to the storage tank part to supply the gasified gaseous ammonia from the inside of the storage tank part to an external device; and a control unit for controlling the operation of the heating unit and the circulation pump unit to supply ammonia gas through the ammonia gas supply line under preset pressure and temperature conditions.

Description

Ammonia storage tank container and gaseous ammonia supply method using same
Technical Field
The present invention relates to an ammonia storage tank container and a gaseous ammonia supply method using the same, and more particularly, to an ammonia storage tank container capable of transporting liquid ammonia by using a storage tank container and supplying the liquid ammonia in a gaseous state, and a gaseous ammonia supply method using the same.
Background
Generally, ammonia is widely used for neutralization of refrigerants in heat treatment processes or refrigeration warehouses, power plants, incineration plants, and the like, and recently, the demand for ammonia has been sharply increased 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 therefore, generation of ammonia gas and supply of the generated ammonia gas to equipment require much attention.
The existing equipment for supplying ammonia gas mainly has a mode of using Y-cylinder.
However, the ammonia gas supply apparatus using y-cylinder has an advantage that high-purity ammonia gas can be supplied as a simple structure, but recently, the situation of semiconductor or LED manufacturing plants tends to be large-scaled, and therefore there is a problem that a sufficient amount of ammonia gas cannot be supplied with such a gas supply apparatus.
Disclosure of Invention
(problem to be solved)
An object of the present invention is to solve the above-described problems and to provide an ammonia storage tank container capable of transporting a sufficient amount of liquid ammonia by using a storage tank container and supplying the liquid ammonia in a gaseous state, and a gaseous ammonia supply method using the ammonia storage tank container.
(means for solving the problems)
The present invention has been made to achieve the above object, and discloses an ammonia storage tank container 10 including: a storage tank section 100 for storing liquid ammonia; a support frame part 200 provided at an outer surface of the storage tank part 100 to support the storage tank part 100; a heat medium passage portion 300 provided on an outer peripheral surface of the storage tank portion 100 and forming a passage for flowing a heat medium for vaporizing the liquid ammonia stored in the storage tank portion 100; a heat medium reservoir portion 400 for storing the heat medium supplied to the heat medium passage portion 300; a heating unit 800 for raising the temperature of the heat medium stored in the heat medium storage tank 400; a circulation pump section 500 for circulating the heat medium between the heat medium passage section 300 and the heat medium reservoir section 400; a gaseous ammonia supply line 600 coupled to the storage tank part 100 to supply vaporized gaseous ammonia from the inside of the storage tank part 100 to an external device; and a control unit for controlling the operation of the heating unit 800 and the circulation pump unit 500 to supply ammonia gas through the ammonia gas supply line 600 under preset pressure and temperature conditions.
The ammonia storage tank container 10 may further include a temperature sensing part 710, and the temperature sensing part 710 is disposed in the storage tank part 100 and senses the temperature of the gaseous ammonia and the liquid ammonia.
The ammonia storage tank container 10 may further include a pressure sensing part 720, and the pressure sensing part 720 senses the pressure inside the storage tank part 100.
The ammonia storage tank container 10 may further include a liquid level sensing part 730, and the liquid level sensing part 730 senses a liquid level of the liquid ammonia stored inside the storage tank part 100.
The storage tank part 100 may be formed in a cylindrical shape and supported by the support frame part 200 in a state of lying horizontally.
The heat medium passage part 300 may be provided corresponding to a lower region of the storage tank part 100.
The thermal medium passage part 300 may include: a heat medium inlet 310 provided at the lowermost portion of the storage tank 100, into which a heat medium flows, and branched into a pair of inlets 312; a pair of heat transfer pipe parts 320 extending from the pair of inlets 312 along both sides of the outer circumferential surface of the storage tank part 100 in a symmetrical shape; and a heat medium outlet portion 330 provided at the distal ends of the pair of heat transfer pipe portions 320 to discharge the heat medium.
The ammonia storage tank 10 may further include a heat medium temperature sensing part 740, and the heat medium temperature sensing part 740 may be disposed in the heat medium storage part 400 to sense the temperature of the heat medium.
The ammonia storage tank container 10 may further include a heat medium level sensing part 750, and the heat medium level sensing part 750 senses a level of the heat medium stored in the heat medium storage tank part 400.
The ammonia storage tank vessel 10 may be an ISO storage tank.
In another aspect, the present invention discloses a method of supplying gaseous ammonia using an ammonia storage tank vessel 10, said ammonia storage tank vessel 10 comprising: a storage tank section 100 for storing liquid ammonia; a support frame part 200 provided at an outer surface of the storage tank part 100 to support the storage tank part 100; a heat medium passage portion 300 provided on an outer peripheral surface of the storage tank portion 100 and forming a passage for flowing a heat medium for vaporizing the liquid ammonia stored in the storage tank portion 100; a heat medium reservoir portion 400 for storing the heat medium supplied to the heat medium passage portion 300; a heating unit 800 for raising the temperature of the heat medium stored in the heat medium storage tank 400; a circulation pump section 500 for circulating the heat medium between the heat medium passage section 300 and the heat medium reservoir section 400; a gaseous ammonia supply line 600 coupled to the storage tank part 100 to supply the vaporized gaseous ammonia from the inside of the storage tank part 100 to an external device.
The method of supplying gaseous ammonia is such that the operation of the heating unit 800 and the circulation pump unit 500 can be controlled, and gaseous ammonia having a required flow rate can be stably supplied through the gaseous ammonia supply line 600 under pressure conditions and temperature conditions set in advance according to the requirements of users.
The gaseous ammonia supply method may include: an indirect heating step of indirectly heating the liquid ammonia stored in the storage tank part 100 through the heat medium passage part 300 to gasify the liquid ammonia stored in the storage tank part 100 into gaseous ammonia; a gaseous ammonia supply step of supplying the gasified gaseous ammonia from the storage tank part 100 to the outside through the gaseous ammonia supply line 600.
The gaseous ammonia supply method may include: an operation state determination step of determining whether or not an operation state is good based on control elements including at least one of a pressure and a temperature of the gaseous ammonia in the storage tank unit 100, a liquid level of the liquid ammonia in the storage tank unit 100, a temperature of the heating unit 800, a temperature of the heat medium in the heat medium storage tank unit 400, and a liquid level; an operation stopping step of stopping the operation of at least one of the heating unit 800 and the circulating pump unit 500 when it is determined that the operation state is an abnormal state.
(Effect of the invention)
The ammonia storage tank container and the gaseous ammonia supply method using the same according to the present invention have the advantage that a sufficient amount of liquid ammonia is transported by the storage tank container and can be supplied in a gaseous state.
In particular, the advantages of the invention are as follows: the storage tank of ISO standard is transported to the place where the ammonia is needed to be supplied by using the trailer, and then the large-capacity ammonia can be supplied at one time, so that the ammonia transportation period can be minimized, and the liquid ammonia can be gasified by indirectly heating the liquid ammonia stored in the storage tank, and the ammonia in a gas state can be directly supplied to the external equipment from the storage tank, so that the convenience of the equipment operation can be greatly improved.
In addition, the ammonia storage tank container and the gaseous ammonia supply method using the same according to the present invention have the following advantages: various operation control methods are introduced according to the operating conditions based on the state of various internal equipment, the level, temperature, or pressure condition of ammonia, and the level, temperature condition, etc. of a heat medium for heating liquid ammonia, and gaseous ammonia which requires attention to storage in the event of an explosion risk can be stably and safely supplied to external equipment.
Drawings
Fig. 1 is a conceptual diagram showing a state where an ammonia storage tank container of the present invention is transported by a trailer.
Fig. 2 a-2 d are top, bottom, front, and rear views of the ammonia storage tank vessel of fig. 1.
FIG. 3 is a conceptual diagram illustrating the ammonia storage tank vessel and operational relationships of FIG. 1.
Fig. 4 is a diagram showing a modification of fig. 3.
Fig. 5a to 5b are views showing a part of the structure of the ammonia storage tank vessel of fig. 1.
Fig. 6 is a table showing respective control methods of the operation states of the ammonia storage tank vessel of fig. 1.
Fig. 7 is a diagram showing a part of the structure of an ammonia storage tank vessel according to another embodiment of the present invention.
(description of reference numerals)
10: ammonia storage tank 20: oil tank truck
Detailed Description
Hereinafter, the ammonia storage tank container according to the present invention will be described in detail with reference to the drawings.
As shown in fig. 1 to 5b, the ammonia storage tank vessel 10 of the present invention includes: a storage tank section 100 for storing liquid ammonia; a support frame part 200 provided at an outer surface of the storage tank part 100 to support the storage tank part 100; a heat medium passage portion 300 provided on an outer peripheral surface of the storage tank portion 100 and forming a passage for flowing a heat medium for vaporizing the liquid ammonia stored in the storage tank portion 100; a heat medium reservoir portion 400 for storing the heat medium supplied to the heat medium passage portion 300; a heating unit 800 for raising the temperature of the heat medium stored in the heat medium storage tank 400; a circulation pump section 500 for circulating the heat medium between the heat medium passage section 300 and the heat medium reservoir section 400; a gaseous ammonia supply line 600 coupled to the storage tank part 100 to supply vaporized gaseous ammonia from the inside of the storage tank part 100 to an external device; and a control unit for controlling the operation of the heating unit 800 and the circulation pump unit 500 to supply ammonia gas through the ammonia gas supply line 600 under preset pressure and temperature conditions.
The ammonia storage tank vessel 10 of the present invention is used for a facility for supplying gaseous ammonia of high purity required in a semiconductor or display manufacturing process in a large capacity, and can be transported to various sites by means of a tank lorry 20.
The ammonia storage tank vessel 10 may meet ISO (International Organization for standardization) standards for ISO storage tanks for transporting liquid hazardous materials.
The storage tank portion 100 is a structure for storing liquid ammonia, may have a sealed type structure for transporting a dangerous material in a liquid state, and may have an insulator (e.g., polyurethane) for heat insulation on an outer circumferential surface.
As shown in fig. 1 to 4, the storage tank part 100 is formed in a cylindrical shape, and both ends in a length direction may be formed in a hemispherical shape to maximally cope with a large volume and overpressure inside the support frame part 200 of a previously set specification.
For example, the storage tank part 100 may have a volume of 19,151L to 19,893L.
The storage tank part 100 can be transported in a state of lying horizontally, so that the storage tank part 100 is stably supported.
For stable operation, the storage tank section 100 may be filled with liquid ammonia up to about 90%, and gaseous ammonia may be supplied to an external device until 10% of liquid ammonia remains.
At this time, the storage tank part 100 may have an inlet 102 for filling liquid ammonia and an outlet 104 for supplying gaseous ammonia to an external device.
The inlet 102 may be connected to an external liquid ammonia supply device through a liquid ammonia supply line 900, and a liquid ammonia supply valve 910 and a liquid ammonia quick shut valve 920 may be provided in the liquid ammonia supply line 900, and the liquid ammonia quick shut valve 920 is used to stop supplying liquid ammonia in case of emergency.
The support shelf part 200 may have various structures as a support structure provided on an outer surface of the storage tank part 100 to support the storage tank part 100.
For example, as shown in fig. 1, the support shelf part 200 may be a rectangular quadrilateral exoskeleton frame having a width, a length and a height set in advance according to ISO standards, and the storage tank part 100 may be disposed and supported in a space inside the support shelf part 200.
The heat medium passage portion 300 may have various structures as a structure that is provided on the outer circumferential surface of the storage tank portion 100 and forms a passage through which the heat medium flows to vaporize the liquid ammonia stored in the storage tank portion 100.
The heat medium flowing along the heat medium passage portion 300 flows along the outer peripheral surface of the storage tank portion 100 and can be heat-exchanged with the liquid ammonia inside the storage tank portion 100.
The heat is transferred to the liquid ammonia through the heat medium, and the liquid ammonia is indirectly heated and then phase-changed into gaseous ammonia.
As the heat medium, various fluids may be used as long as they can stably transfer heat to liquid ammonia; for example, a fluid (EG Water) in which ethylene glycol and Water are mixed in a predetermined ratio may be used as the heat medium.
The heat medium passage portion 300 may be closely attached to the outer circumferential surface of the storage tank portion 100; more specifically, as shown in fig. 3, 4 and 5b, it is preferable to be provided corresponding to a lower region of the storage tank part 100, rather than the entire outer circumferential surface of the storage tank part 100.
For example, as shown in fig. 5a to 5b, the heat medium passage part 300 may include: a heat medium inlet portion 310 provided at the lowermost portion of the storage tank portion 100, into which the heat medium flows, and branched into a pair of inlets 312; a pair of heat transfer pipe parts 320 extending from the pair of inlets 312 along both sides of the outer circumferential surface of the storage tank part 100 in a symmetrical shape; and a heat medium outlet 330 provided at the distal ends of the pair of heat transfer pipe parts 320 for discharging the heat medium.
The heat medium inlet part 310 is a structure provided at the lowermost portion of the storage tank part 100 to allow the heat medium to flow therein and is branched into a pair of inlets 312, and may have various structures.
As shown in fig. 5a, the heat medium inlet 310 may be provided at the lowest portion of the storage tank 100 supported in a horizontally lying state, and may be provided at the central portion of the lowest portion of the storage tank 100 or at the end side in the longitudinal direction beyond the central portion, in order to avoid interference with other devices.
The pair of heat transfer pipe parts 320 are a pair of pipes extending from the pair of inlets 312 along both sides of the outer circumferential surface of the storage tank part 100 in a symmetrical shape, and may be formed in various shapes.
For example, as shown in fig. 5a, the pair of heat transfer pipe parts 320 may be formed in a zigzag shape extending from the lowermost portion of the storage tank part 100 to the upper portion while reciprocating in the longitudinal direction of the storage tank part 100.
At this time, connection pipe portions 322 for communicating the heat medium may be provided at the heat medium flow direction changing points (both end sides of the storage tank portion 100) flowing along the zigzag-shaped heat transfer pipe portions 320.
As shown in fig. 5a, a vent (Air vent)323 may be provided at a suitable position in the connection duct part 322 for discharging Air generated inside the heat transfer duct part 320 to the outside.
In the case where the plurality of connecting pipe portions 322 are provided along the pattern of the heat transfer pipe portions 320, it is preferable that the plurality of connecting pipe portions 322 are provided at positions shifted from each other so as to avoid interference with each other and to minimize the interval between the adjacent heat transfer pipe portions 320.
Accordingly, the heat transfer pipe 320 maximizes the heat transfer area, thereby improving the heat transfer efficiency.
In addition, as shown in fig. 5b, as a method for maximizing a heat transfer area, the heat transfer pipe part 320 may be formed in a semicircular shape in cross section in surface contact with the outer circumferential surface of the storage tank part 100.
One of the pair of heat transfer pipe portions 320 is formed along one side surface a with reference to a center line L parallel to the longitudinal direction of the planar storage tank portion 100, and indirectly heats the liquid ammonia at the one side surface a of the storage tank portion 100, while the remaining one of the pair of heat transfer pipe portions 320 is formed along the other side surface B with reference to a center line L parallel to the longitudinal direction of the planar storage tank portion 100, and indirectly heats the liquid ammonia at the other side surface B of the storage tank portion 100.
In this case, the pair of heat transfer pipe portions 320 may be formed in a symmetrical shape with reference to a center line L parallel to the longitudinal direction of the planar storage tank portion 100.
Accordingly, the liquid ammonia stored in the storage tank part 100 can be uniformly heated.
On the other hand, as shown in fig. 5b, the heat transfer pipe 320 extends upward from the lowermost portion of the storage tank 100 along the outer peripheral surface of the storage tank 100 to cover the central portion of the storage tank 100 with respect to the height thereof.
Since the liquid level of the liquid ammonia stored in the storage tank portion 100 gradually decreases as the supply of gaseous ammonia to the external equipment continues, the heat transfer pipe portion 320 does not entirely cover the outer peripheral surface of the storage tank portion 100, but only covers the portion from the lower portion to the central portion of the storage tank portion 100, and thus heat can be sufficiently transferred to the liquid ammonia.
In order to convert the liquid ammonia gas inside the storage tank section 100 into gaseous ammonia at a temperature set in advance, the heat transfer area of the heat transfer pipe section 320 specifically required may be calculated as follows.
When the inner diameter Di of the tank part 100, the length (Tan to Tan length) of the straight portion S of the tank part 100 is Lt, and the volumes of the two heads H at the two ends of the tank part 100 are V, the thus calculated inner volume of the tank part 100 can be assumed to be Vo.
At this time, if the flow rate F (SLPM, kg/min, kg/hr) of gaseous ammonia requested by the user is set, the thermal load Q1(Heat duty, kcal/hr, kw) of the liquid ammonia to be supplied to the storage tank portion 100 can be calculated in consideration of the latent Heat of the liquid ammonia (291.8kcal/kg, SRK @130psig VP ═ 1(24.8 ℃)) so as to supply gaseous ammonia at about the flow rate.
When the heat transfer rate (U value) of the heat transfer pipe portion 320 is U (kcal/hr · m2 ℃) and LMTD (log mean temperature difference) is D (℃.
(math formula 1)
Figure GDA0003475107750000081
If Areq, which is the heat transfer area required for the liquid ammonia at the vaporization flow rate F, is determined, the length and number of the heat transfer pipe parts 320, the contact area with the storage tank part 100, the cross-sectional shape, and the cross-sectional area (DA) are determined so as to have a heat transfer area larger than Areq (for example, an area larger than Areq by about 125%).
For example, as shown in fig. 5b, the heat transfer pipe 320 has a trapezoidal cross section, and the long side (aa) of the trapezoidal cross section is in close contact with the outer circumferential surface of the storage tank 100 to secure a heat transfer area, and the heat transfer pipe 320 may be extended in a zigzag pattern within a preset section length RL to have a heat transfer area 1.25 times the heat transfer area Areq required for vaporizing the liquid ammonia at the flow rate F.
On the other hand, the heat transferred to the liquid ammonia through the heat transfer pipe portion 320 is required to be increased in temperature to the temperature of vaporizing the liquid ammonia (for example, 28 ℃) in the initial stage (for example, -20 ℃) before supplying the gaseous ammonia, and therefore, a temperature increase time for increasing the temperature to the temperature of vaporizing the liquid ammonia is required. Such a temperature rise time depends on a heat load for raising the temperature of the liquid ammonia to a desired temperature or the ability of the heat transfer pipe portion 320 to transfer heat.
The heat medium outlet portion 330 is a structure provided at the tip ends of the pair of heat transfer pipe portions 320 to discharge the heat medium, and may have various structures.
The heat medium outlet portion 330 may communicate with the ends and the entirety of the pair of heat transfer tube parts 320, and discharge the heat medium discharged from the pair of heat transfer tube parts 320 together at one time.
Preferably, the heat medium outlet part 330 is located at the other side facing the heat medium inlet part 310.
In more detail, as shown in fig. 5a, the heat medium outlet part 330 may be disposed at the other side of the heat medium inlet part 310 with the heat transfer pipe part 320 interposed between the heat medium outlet part 330 and the heat medium inlet part 310.
On the other hand, the required heat medium flow rate circulating through the heat medium passage 300 and the heater capacity (heater capacity) required by the heating unit 800 to heat the subsequent number of the circulating heat media can be calculated based on the temperature T1 of the heat medium flowing in through the heat medium inlet portion 310 and the temperature T2 of the heat medium discharged through the heat medium outlet portion 330.
The heat medium reservoir part 400 is a reservoir tank (SUMP) that stores the heat medium supplied to the heat medium passage part 300, and may have various structures.
The heat medium reservoir part 400 supplies the stored heat medium to the heat medium passage part 300, and may store the heat medium discharged through the heat medium outlet part 330 of the heat medium passage part 300.
The heat medium reservoir portion 400 may have a heat medium outlet 402 and a heat medium inlet 404, the heat medium outlet 402 may be communicated with the heat medium inlet portion 310 of the heat medium passage portion 300 to discharge the heat medium, and the heat medium inlet 404 may be communicated with the heat medium outlet portion 330 of the heat medium passage portion 300 to flow the heat medium.
The heat medium outlet 402 and the heat medium inlet 404 may be provided with a ball valve 405, and particularly, a filter 407 for removing impurities from the heat medium may be provided on the heat medium outlet 402 side.
The heating part 800 is a heating tool for increasing the temperature of the heat medium stored in the heat medium storage part 400, and may have various configurations.
As shown in fig. 3 and 4, the heating part 800 may include a plurality of heaters 810 and 820 to perform uniform heating.
The circulation pump unit 500 is a pump for circulating the heat medium between the heat medium passage unit 300 and the heat medium reservoir unit 400, and may have various configurations, and a known pump may be applied thereto, and thus detailed description thereof is omitted. For example, the circulation pump unit 500 may be integrally formed with the motor M or may be separately formed, and a bottom plate having a dust-proof pad may be provided at a lower portion of the circulation pump unit 500.
The circulation pump part 500 may be provided on the heat medium passage between the heat medium outlet 402 of the heat medium reservoir part 400 and the heat medium inlet part 310 of the heat medium passage part 300.
A flow rate adjustment valve 510 may be provided between the circulation pump part 500 and the heat medium inlet part 310 of the heat medium passage part 300 for adjusting the heat medium flow rate in the heat medium passage part 300.
The flow control valve 510 is connected to an instrument air line (i.a) of an external device, and the flow control valve 510 is controlled by a pneumatic signal of the instrument air line (i.a).
The flow rate control valve 510 may be provided with a bypass valve 512 connecting an inlet and an outlet of the flow rate control valve 510, and the outlet of the circulation pump unit 500 may be provided with a minimum flow rate valve 520 for flowing the heat medium to the heat medium reservoir unit 400.
Accordingly, the heat medium discharged through the heat medium outlet 402 of the heat medium reservoir portion 400 may be circulated by: passes through the circulating pump section 500 and the flow rate adjustment valve 510 in this order, enters the heat medium inlet section 310 of the heat medium passage section 300, then flows along the outer peripheral surface of the storage tank section 100 through the heat transfer pipe section 320, then is discharged through the heat medium outlet section 330, and then flows into the heat medium inlet 404 of the heat medium reservoir section 400 again.
The gaseous ammonia supply line 600 is a gas supply pipe coupled to the storage tank part 100 to supply vaporized gaseous ammonia from the inside of the storage tank part 100 to an external apparatus, and may have various structures.
The gaseous ammonia is supplied to the external equipment through the gaseous ammonia supply line 600 at a flow rate per unit time.
The gaseous ammonia Supply line 600 may be incorporated into a BSGS (Bulk Special Gas Supply System) for manufacturing semiconductors or displays.
In more detail, the gaseous ammonia supply line 600 is combined with the outlet 104 of the storage tank part 100, connected to an external device such as BSGS, and thus gaseous ammonia may be supplied to the external device, and a gaseous ammonia supply valve 620 and a gaseous ammonia emergency cut-off valve 630 for emergency cut-off of supply of gaseous ammonia may be provided at the gaseous ammonia supply line 600.
The gaseous ammonia quick action valve 630 is connected to an instrument air line (i.a) of an external device, and the gaseous ammonia quick action valve 630 is controlled by a gas pressure signal from the instrument air line (i.a).
In addition, a hot wire 610 and a heat insulating protection member (not shown) may be provided along the pipe at the gaseous ammonia supply line 600 to prevent the gaseous ammonia from being liquefied again.
On the other hand, as shown in fig. 3, the gaseous ammonia supply line 600 may be an external line type pipe combined to the outside of the storage tank part 100 or an internal line type pipe disposed inside the storage tank part 100 as shown in fig. 4 and 7.
In the case where the gaseous ammonia supply line 600 is an internal line type (internal line type) disposed inside the storage tank part 100, if the inlet 602 is located at the upper side of the storage tank part 100, the gaseous ammonia supply line 600 may be relatively disposed at various positions and may be formed in various shapes.
For example, as shown in fig. 4 and 7, the gaseous ammonia supply line 600 may be a gooseneck (Goose neck) pipe, and a baffle plate (block plate)604 for preventing inflow of liquid ammonia may be provided at the inlet 602 side.
In addition, as shown in fig. 7, the gaseous ammonia supply line 600 may be provided with a relief valve 640 (process flow valve) for safety.
On the other hand, the ammonia storage tank 10 may further include a temperature sensing unit 710, and the temperature sensing unit 710 is disposed in the storage tank 100 to sense the temperature of the ammonia gas and the liquid ammonia.
The temperature sensing portion 710 may be formed of various temperature sensors, such as a contact type or a non-contact type, or an RTD, TC, as long as it can sense the temperature of the liquid ammonia and the gaseous ammonia.
The temperature sensing part 710 may include a first temperature sensing part 712 and a second temperature sensing part 714, the first temperature sensing part 712 being disposed at an upper portion of the storage tank part 100 to sense the temperature of the gaseous ammonia inside the storage tank part 100, and the second temperature sensing part 714 being disposed at a lower portion of the storage tank part 100 to sense the temperature of the liquid ammonia inside the storage tank part 100.
In addition, the ammonia storage tank container 10 may further include a pressure sensing portion 720 that senses the pressure inside the storage tank portion 100.
The pressure sensing unit 720 may be configured by various pressure sensors as long as it can measure the pressure inside the storage tank unit 100 generated by the generation of gaseous ammonia due to the saturation temperature of liquid ammonia.
In addition, the ammonia storage tank container 10 may further include a liquid level sensing part 730 sensing a liquid level of liquid ammonia stored inside the storage tank part 100.
The liquid level sensing part 730 may be formed of various types of liquid level sensors, such as an optical type, an ultrasonic type, or a pressure type, as long as it can continuously or discontinuously sense the liquid level of the liquid ammonia stored in the storage tank part 100.
Of course, the pressure sensing part 720 and the liquid level sensing part 730 may be integrated with a Transmitter (Transmitter).
The ammonia storage tank 10 may further include a heat medium temperature sensing unit 740, and the heat medium temperature sensing unit 740 may be disposed in the heat medium storage tank 400 to sense the temperature of the heat medium.
The thermal medium temperature sensing part 740 may be configured by various temperature sensors, such as a contact type or a non-contact type, or an RTD, a TC, and the like, as long as it can sense the temperature of the thermal medium stored in the thermal medium storage part 400.
In addition, the ammonia storage tank container 10 may further include a heat medium level sensing part 750, and the heat medium level sensing part 750 senses a level of the heat medium stored in the heat medium storage tank part 400.
The heat medium level sensing part 750 may be formed of various types of level sensors, such as an optical type, an ultrasonic type, or a pressure type, as long as it can continuously or discontinuously sense the level of the heat medium stored in the heat medium storage part 400; as shown in FIG. 4, the level can also be sensed by Sight Glass.
The ammonia storage tank container 10 may further include one or more relief valves 110, and the relief valves 110 may be provided in the storage tank part 100, and may discharge the gaseous ammonia inside to the outside of the storage tank part 100 when the internal pressure of the storage tank part 100 is increased to be greater than a preset design pressure.
The control unit may have various configurations as a control means for controlling the operation of the heating unit 800 and the circulation pump unit 500 to supply gaseous ammonia through the gaseous ammonia supply line 600 under preset pressure conditions and temperature conditions.
Hereinafter, the operation of the control unit will be described in detail together with the method of supplying gaseous ammonia using the ammonia storage tank 10 having the above-described configuration.
First, the gaseous ammonia supply method may include: a moving step of moving the ammonia storage tank container 10 filled with liquid ammonia (up to 90% of the storage tank portion 100) to a gaseous ammonia supply place (place where an external device is installed) where gaseous ammonia needs to be supplied, by the tank lorry 20; a setting step of connecting the gaseous ammonia supply line 600 of the storage tank vessel 10 and an external device in a gaseous ammonia supply site; a supply step of supplying gaseous ammonia to the external apparatus through the gaseous ammonia supply line 600; an end step of interrupting the supply of the gaseous ammonia if the liquid ammonia remaining in the storage tank part 100 is below a preset reference; a release step of releasing the connection of the gaseous ammonia supply line 600 of the storage tank container 10 and the external device.
The tank wagon 20, in which the storage tank container 10 is provided, may be directly parked at the gaseous ammonia supply site, and a weigher may be provided on a supporting surface of the tank wagon 20 for measuring the amount of liquid ammonia remaining in the storage tank container 10. Once the tanker 20 arrives at the gaseous ammonia supply site, a quality measurement can be performed.
The setting step may include a step of connecting not only the gaseous ammonia supply line 600 and the external device but also an electrical device of an instrument air line (i.a) or a POWER BOX (POWER BOX) of the external device to the storage tank container 10.
In the setting step, the open/close state of each valve provided in the storage tank vessel 10 may be confirmed, and after the confirmation of the open/close state of the valves, if there is no abnormality, the connection may be performed to the gaseous ammonia supply line 600, the instrument air line (i.a), and the electrical equipment.
The hot wire 610 of the gaseous ammonia supply line 600 may be powered for a predetermined time after the gaseous ammonia supply line 600 is secured to the BSGS of the external device.
The supplying step, which is a supplying step of supplying gaseous ammonia to an external apparatus through the gaseous ammonia supply line 600, may control the operations of the heating part 800 and the circulation pump part 500 to supply gaseous ammonia through the gaseous ammonia supply line 600 under pressure conditions and temperature conditions set in advance. The control unit can control the operation of the heating unit 800 and the circulating pump unit 500 by transmitting a control signal through an electric signal line (dashed line) shown in fig. 3 and 4.
Specifically, the supplying step may include: an indirect heating step of indirectly heating the liquid ammonia stored in the storage tank part 100 through the heat medium passage part 300 to convert the liquid ammonia stored in the storage tank part 100 into gaseous ammonia; a gaseous ammonia supply step of supplying the gasified gaseous ammonia from the storage tank portion 100 to the outside through a gaseous ammonia supply line 600.
The indirect heating step may initiate circulating pump section 500 to circulate the thermal medium through thermal medium channel section 300.
At this point, the indirect heating step may start circulating pump section 500 within a temperature range set in advance. That is, if the temperature of the heat medium is lower than the lower limit of the temperature range set in advance in the indirect heating step, the control section starts the circulating pump section 500; if the temperature is higher than the upper limit, the control section stops starting the circulating pump section 500.
Of course, this temperature range may vary with operating conditions.
Then, the indirect heating step may activate the heating part 800 within a temperature range set in advance.
That is, if the temperature of the heat medium is lower than the lower limit of the temperature range set in advance in the indirect heating step, the control section starts the heating section 800; if the temperature is higher than the upper limit, the control part may stop starting the heating part 800. Of course, this temperature range may vary with operating conditions.
At this time, the control unit activates heating unit 800 only in a state where circulating pump unit 500 is activated. The control unit may start the circulating pump unit 500 and the heating unit 800 after checking whether or not the liquid ammonia level in the storage tank unit 100 and the heat medium level in the heat medium storage tank unit 400 are appropriate.
The control unit activates the heating unit 800 and the circulating pump unit 500, so that the liquid ammonia stored in the storage tank unit 100 is indirectly heated and vaporized into gaseous ammonia, and the pressure in the storage tank unit 100 can be increased.
The control unit controls the operation of the heating unit 800 and the circulation pump unit 500, so that the ammonia gas can be supplied to an external device through the ammonia gas supply line 600 under pressure, flow rate, and temperature conditions set in advance.
If the supply of gaseous ammonia is completed by the supply step (for example, the remaining amount of liquid ammonia inside the storage tank part 100 reaches 10%), an end step of stably stopping the supply of gaseous ammonia may be performed.
In the end step, the control part may stop the activation of the heating part 800 and the circulation pump part 500, close the gaseous ammonia supply valve 620 and the gaseous ammonia quick disconnect valve 630 for supplying gaseous ammonia, and may cut off the supply of gaseous ammonia.
After the supply of gaseous ammonia is cut off, a releasing step of releasing the connection of the gaseous ammonia supply line 600 of the storage tank container 10 and the external device may be performed.
In the release step, the gaseous ammonia supply line 600 and the external device may be disassembled, and the power cable may be separated to cut off the power supply.
However, ammonia corresponds to a flammable hazardous material, and in order to ensure the safety of the equipment in an abnormal operation state, the method for supplying gaseous ammonia of the present invention may further include: an operation state determination step of determining whether or not the operation state of the ammonia storage tank 10 is good; and an operation stopping step of stopping the operation of at least one of heating unit 800 and circulating pump unit 500 when the operation state is determined to be abnormal.
The operation state determination step may determine whether the operation state is good or not based on control elements including at least one of the pressure and temperature of the gaseous ammonia in the storage tank unit 100, the liquid ammonia level in the storage tank unit 100, the liquid ammonia temperature in the storage tank unit 100, the temperature of the heating unit 800, and the heat medium temperature and liquid level in the heat medium storage tank unit 400.
The control element can be measured by the temperature sensing part 710, the pressure sensing part 720, the liquid level sensing part 730, the heat medium temperature sensing part 740, and the heat medium liquid level sensing part 750.
Hereinafter, the operation of heating unit 800 and circulating pump unit 500 in the operation state determination step and the operation stop step will be described in detail with reference to fig. 6.
In the first case, the operation state determination step may determine that the operation state is abnormal when the pressure of the ammonia gas in the storage tank portion 100 is higher than a preset value.
In the second case, the operation state determination step may determine that the operation state is abnormal when the temperature of the ammonia gas in the storage tank portion 100 is higher than a preset value set in advance.
In the third case, the operation state determination step may determine that the operation state is abnormal when the temperature of the liquid ammonia in the storage tank unit 100 is higher than a preset value.
In the first to third cases, the operation of the circulating pump unit 500 is stopped and the operation of the heating unit 800 is stopped in the operation stop step control unit, and the flow rate control valve 510 is closed, so that the pressure and temperature of the gaseous ammonia and the temperature of the liquid ammonia in the storage tank unit 100 can be made not to exceed the set values. In addition, an abnormal state may be warned by a warning lamp (not shown) provided at the storage tank container 10.
In the fourth and fifth cases, the operation state determination step may determine that the operation state is abnormal when the temperature of the heating unit 800, more specifically, the temperature of each of the heaters 810 and 820 is higher than a preset value.
In the fourth and fifth cases, the operation stop step controller may stop the operation of the heater 810 or 820 having a value larger than a set value among the plurality of heaters 810 or 820.
In the sixth case, the operation state determination step may determine that the operation state is abnormal when the temperature of the heat medium stored in the heat medium reservoir portion 400 is higher than a set value set in advance.
In the sixth case, the operation of the circulating pump unit 500 is stopped and the operation of the heating unit 800 is stopped in the operation stop step control unit, and the flow rate control valve 510 is closed, whereby the temperature of the heat medium stored in the heat medium storage tank unit 400 can be stored so as not to exceed a set value. In addition, an abnormal state may be warned by a warning lamp (not shown) provided at the storage tank container 10.
In the seventh case, the operation state determination step may determine that the operation state is abnormal when the liquid level of the heat medium stored in the heat medium reservoir portion 400 is less than a preset value.
In the seventh case, in the operation stopping step, the control section stops the operation of circulating pump section 500 and stops the operation of heating section 800, and an abnormal state may be warned by an alarm lamp (not shown) provided in reserve tank container 10.
In the eighth case, the operation state determination step may determine that the operation state is abnormal when the liquid level of the heat medium stored in the heat medium reservoir portion 400 is greater than a preset value but reaches a threshold value close to the preset value.
In the eighth case, the control portion maintains the state of operation of circulating pump portion 500 or heating portion 800, and an abnormal state may be warned by an alarm lamp (not shown) provided in reserve tank container 10.
Finally, in the ninth case and the tenth case, the operation state determination step may determine that the operation state is an abnormal state when the liquid ammonia level stored in the storage tank part 100 is lower than a lower limit (for example, 10% margin) set in advance or higher than an upper limit (for example, 85% margin) set in advance.
In the ninth and tenth cases, the control portion maintains the state of operation of the circulating pump portion 500 or the heating portion 800, and an abnormal state may be warned by an alarm lamp (not shown) provided in the storage tank container 10.
On the other hand, the method for supplying gaseous ammonia of the present invention may further include an emergency stop step that can be dealt with in the event of a power failure or a failure in the instrument air line (i.a), in addition to the above-described operation state determination step and operation stop step.
For example, in the emergency stop step, when the power supply (power failure) to the storage tank 10 is cut off, the operation of the circulating pump unit 500 and the heating unit 800 is stopped, and the flow rate control valve 510 and the gaseous ammonia emergency cutoff valve 630 can be FC (fault closed, automatic closing in the event of a failure).
As another example, the emergency stop step may be that the flow control valve 510 may be fc (fail closed) in the event that no pressure is supplied to the flow control valve 510 from the instrument air line (IA). When the flow rate control valve 510 is fc (failed closed), the heat medium can be self-circulated in the heat medium reservoir unit 400 and the circulation pump unit 500.
As another example, the emergency stop step is that the gaseous ammonia quick shut valve 630 may be fc (fail closed) in the case where no pressure is supplied from the instrument air line (i.a) to the gaseous ammonia quick shut valve 630. If the gaseous ammonia quick shut valve 630 is fc (fast closed), the pressure of the gaseous ammonia in the storage tank portion 100 can be increased. In this case, according to the first case described above, the operation of circulating pump unit 500 and heating unit 800 is stopped, and flow rate control valve 510 can be closed.
The case of the gaseous ammonia supply method of the present invention has the following advantages: in addition to the power failure and the failure of the instrument air line, the operation state based on the control elements is classified into various states and judged to control the operations of the heating unit 800 and the circulating pump unit 500, and in any case, a large amount of gaseous ammonia can be supplied safely and stably.
The above description is only a part of the preferred embodiments that can be realized by the present invention, and it is well known that the scope of the present invention is not limited to the above-described embodiments, and the technical ideas of the present invention and the fundamental technical ideas thereof described above should be entirely included in the scope of the present invention.

Claims (11)

1. An ammonia storage tank vessel (10), comprising:
a storage tank unit (100) for storing liquid ammonia;
a support frame part (200) provided on an outer surface of the storage tank part (100) to support the storage tank part (100);
a heat medium passage portion (300) that is provided on the outer peripheral surface of the storage tank portion (100) and that forms a passage for flowing a heat medium for vaporizing liquid ammonia stored inside the storage tank portion (100);
a heat medium storage portion (400) that stores the heat medium supplied to the heat medium passage portion (300);
a heating unit (800) for increasing the temperature of the heat medium stored in the heat medium storage tank unit (400);
a circulation pump section (500) for circulating a heat medium between the heat medium passage section (300) and the heat medium reservoir section (400);
a gaseous ammonia supply line (600) coupled to the storage tank section (100) and coupled to an external device to supply vaporized gaseous ammonia from within the storage tank section (100) to the external device;
a liquid ammonia supply line (900) connected to an external liquid ammonia supply device for filling the storage tank portion (100) with liquid ammonia; a control unit for controlling the operation of the heating unit (800) and the circulation pump unit (500) so that gaseous ammonia is supplied through the gaseous ammonia supply line (600) under preset pressure conditions, temperature conditions, and flow rate per unit time,
wherein the ammonia storage tank vessel (10),
a gaseous ammonia supply line (600) is provided with: a hot wire (610) disposed along the calandria line for preventing re-liquefaction of the gaseous ammonia; a gaseous ammonia supply valve (620); and a gaseous ammonia quick shut valve (630) for cutting off the supply of gaseous ammonia in an emergency,
the heat medium passage portion (300) includes: a heat medium inlet part (310) provided at the lowermost part of the storage tank part (100), into which a heat medium flows, and branched into a pair of inlets (312),
a flow rate adjusting valve (510) for adjusting a flow rate of the heat medium on the heat medium passage portion (300) is provided between the circulating pump portion (500) and the heat medium inlet portion (310),
the ammonia storage tank container (10) is an ISO storage tank container which can meet ISO standards for liquid ammonia transportation, and is transported by a tank truck (20) to a gaseous ammonia supply site after the liquid ammonia supply facility is filled with liquid ammonia, and gaseous ammonia is supplied to the external facility in a state of being installed on the tank truck (20) at the gaseous ammonia supply site,
in the gaseous ammonia supply site, the ammonia storage tank vessel (10) is connected to a power supply box of an external device for supplying power,
in the gaseous ammonia supply site, the gaseous ammonia quick action valve (630) and the flow regulating valve (510) are connected to an instrument air line (I.A) of the external device,
the control part is used for controlling the operation of the motor,
when the power supply from the power supply box is cut off, the operation of the circulating pump unit (500) and the heating unit (800) is interrupted, the flow rate control valve (510) and the ammonia gas quick action valve (630) are automatically closed when a failure occurs,
when the instrument air line (I.A) does not supply pressure to the flow rate adjustment valve (510), the flow rate adjustment valve (510) automatically closes in the event of a failure, and the heat medium is caused to circulate in the heat medium reservoir section (400) and the circulation pump section (500) by itself,
when the pressure is not supplied to the ammonia gas quick shut valve (630) through the meter air line (i.a), the ammonia gas quick shut valve (630) automatically closes when a failure occurs, the pressure of the ammonia gas in the storage tank section (100) becomes higher than a set value, the operation state is determined to be abnormal, the operation of the circulating pump section (500) and the heating section (800) is controlled to be shut off, and the control section closes the flow rate adjustment valve (510).
2. Ammonia storage tank vessel (10) according to claim 1,
the ammonia storage tank container (10) further comprises a temperature sensing portion (710), wherein the temperature sensing portion (710) is arranged in the storage tank portion (100) and senses the temperature of the gaseous ammonia and the temperature of the liquid ammonia.
3. Ammonia storage tank vessel (10) according to claim 1,
the ammonia storage tank container (10) further includes a pressure sensing portion (720), and the pressure sensing portion (720) senses the pressure inside the storage tank portion (100).
4. Ammonia storage tank vessel (10) according to claim 1,
the ammonia storage tank container (10) further comprises a liquid level sensing part (730), wherein the liquid level sensing part (730) senses the liquid level of the liquid ammonia stored in the storage tank part (100).
5. Ammonia storage tank vessel (10) according to claim 1,
the storage tank part (100) is formed in a cylindrical shape and is supported by the support frame part (200) in a state of lying horizontally;
the heat medium passage portion (300) is provided corresponding to a lower region of the storage tank portion (100).
6. Ammonia storage tank vessel (10) according to claim 5,
the heat medium passage portion (300) further includes: a pair of heat transfer pipe sections (320) extending from the pair of inlets (312) along both sides of the outer peripheral surface of the storage tank section (100) in a symmetrical shape; and a heat medium outlet portion (330) provided at the distal ends of the pair of heat transfer pipe portions (320) for discharging the heat medium.
7. Ammonia storage tank vessel (10) according to claim 1,
the ammonia storage tank container (10) further comprises a heat medium temperature sensing part (740), and the heat medium temperature sensing part (740) is arranged in the heat medium storage tank part (400) to sense the temperature of the heat medium.
8. Ammonia storage tank vessel (10) according to claim 7,
the ammonia storage tank container (10) further comprises a heat medium liquid level sensing part (750), wherein the heat medium liquid level sensing part (750) senses and stores the liquid level of the heat medium in the heat medium storage groove part (400).
9. A gaseous ammonia supply method, as a gaseous ammonia supply method using the ammonia storage tank vessel (10) according to any one of claims 1 to 8, the ammonia storage tank vessel (10) comprising: a storage tank unit (100) for storing liquid ammonia; a support frame part (200) provided on an outer surface of the storage tank part (100) to support the storage tank part (100); a heat medium passage portion (300) that is provided on the outer peripheral surface of the storage tank portion (100) and that forms a passage for flowing a heat medium for vaporizing liquid ammonia stored inside the storage tank portion (100); a heat medium storage portion (400) that stores the heat medium supplied to the heat medium passage portion (300); a heating unit (800) for increasing the temperature of the heat medium stored in the heat medium storage tank unit (400); a circulation pump section (500) for circulating a heat medium between the heat medium passage section (300) and the heat medium reservoir section (400); a gaseous ammonia supply line (600) coupled to the storage tank section (100) and coupled to an external device to supply vaporized gaseous ammonia from within the storage tank section (100) to the external device,
the method of supplying gaseous ammonia is characterized in that the operation of the heating unit (800) and the circulation pump unit (500) is controlled so that gaseous ammonia is supplied through the gaseous ammonia supply line (600) under preset pressure conditions, temperature conditions, and flow rate per unit time.
10. The method of supplying gaseous ammonia according to claim 9,
the gaseous ammonia supply method comprises:
an indirect heating step of indirectly heating the liquid ammonia stored in the storage tank section (100) through the heat medium passage section (300) to convert the liquid ammonia stored in the storage tank section (100) into gaseous ammonia;
a gaseous ammonia supply step of supplying the gasified gaseous ammonia from the storage tank part (100) to the outside through the gaseous ammonia supply line (600).
11. The method of supplying gaseous ammonia according to claim 10,
the gaseous ammonia supply method comprises:
an operating state determination step of determining whether or not the operating state is satisfactory based on control elements including at least one of the pressure and temperature of the gaseous ammonia in the storage tank unit (100), the liquid level of the liquid ammonia in the storage tank unit (100), the temperature of the heating unit (800), the temperature of the heat medium in the heat medium storage tank unit (400), and the liquid level; and an operation stopping step of stopping the operation of at least one of the heating unit (800) and the circulating pump unit (500) when the operation state is determined to be abnormal.
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