WO1989002561A1 - Procede et dispositif destines a un evaporateur de gaz liquide - Google Patents

Procede et dispositif destines a un evaporateur de gaz liquide Download PDF

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Publication number
WO1989002561A1
WO1989002561A1 PCT/DE1988/000550 DE8800550W WO8902561A1 WO 1989002561 A1 WO1989002561 A1 WO 1989002561A1 DE 8800550 W DE8800550 W DE 8800550W WO 8902561 A1 WO8902561 A1 WO 8902561A1
Authority
WO
WIPO (PCT)
Prior art keywords
temperature
evaporator
gas
temperature measuring
heating
Prior art date
Application number
PCT/DE1988/000550
Other languages
German (de)
English (en)
Inventor
Erich Berger
Günter Sonntag
Original Assignee
Erich Berger
Sonntag Guenter
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Erich Berger, Sonntag Guenter filed Critical Erich Berger
Priority to KR1019890700874A priority Critical patent/KR890701949A/ko
Publication of WO1989002561A1 publication Critical patent/WO1989002561A1/fr

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/0082—Regulation; Control
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • 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
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0439—Temperature
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0631—Temperature

Definitions

  • the invention is based on a method and an apparatus for carrying out the method for evaporating liquid gas according to the preamble of claim 1 and claim 5.
  • the evaporator heater can be of the most varied types and work, for example, with electrical current, hot water, steam or direct flame as the heating medium.
  • a pipe system carrying at least liquid gas at the beginning is heated by the heating medium in order to leave the evaporator as gas vapor.
  • the vaporization of the liquid gas has been made Sicher ⁇ safety reasons, within a given Temperaturbe ⁇ rich, the properties of the physical Eigen ⁇ "of the respective gas is determined.
  • limitation and control of Schutempera ⁇ be tur conventional regulation and control devices as well as Temperaturmeßorgane used where interference can occur due to wear or external interference with the associated risk of fire or even explosions in the system. Since the volume of liquefied gas increases from the liquid to the gaseous state by 260 times, small amounts of liquid can form a gas vapor reserve in the line section provided for the gas phase, which can lead to serious accidents, particularly if any control units and sensors fail.
  • German standard for evaporators of liquefied petroleum gas stipulates as minimum requirements that the evaporators must be equipped and controlled in such a way that a gas outlet temperature between 40 ° C and 80 ° C can be maintained ( Clause 3.5.3 of this standard).
  • the standard also stipulates (Clause 3.5.4) that there must be a temperature limiter that either limits the temperature of the heating medium to a maximum of 100 ° C or that prevents the gas outlet temperature from being exceeded by 90 ° C.
  • liquid gas mixtures for example of butane and propane
  • propane has a boiling point of - 44 ° C
  • that for butane is +/- 0 ° C.
  • the necessary working range and of course the risk that liquid gases collect somewhere in the gas phase line section and thus one form dangerous additional storage.
  • gas-heated evaporator heaters which take the heating gas from the gas phase of the evaporator system, sufficient gas vapor or evaporating liquid gas can still be present in the system after the liquid gas supply has been shut off, which can lead to severe overheating and destruction of the entire system.
  • the method according to the invention with the characterizing features of claim 1 and the device according to the invention with the characterizing features of claim 5 has the advantage that an additional safeguard is provided against exceeding a maximum temperature or falling below a minimum temperature.
  • This additional safeguard also assumes its function in the event of failure of one of the known temperature measuring elements, for example as an actual value transmitter for regulating the heating energy, or for shutting off the inlet valve of the evaporator or interrupting the energy supply to the evaporator heating.
  • the evaporator heater can also operate in another manner according to the invention, such as with electrical energy or an externally heated heat transfer medium.
  • these additional safety devices according to the invention and the devices already customary on the basis of the standard work independently of one another, so that the invention goes back to empirical values.
  • the third temperature measuring point or the second temperature measuring element is close to the first temperature measuring element and in the hottest section of the gas phase. This advantageously ensures that the safety level is maintained by using the first temperature measuring element for the setpoint value control, whereas the second temperature measuring element is used for securing when the safety temperature is exceeded. On Control errors due to measurements in different gas streams, possibly at different temperatures, are thereby avoided.
  • the evaporator heating has a gas burner, the gas supply of which is determined via the energy regulator designed as a gas quantity and gas pressure regulator, in particular upstream of the energy regulator an arbitrarily controlled one that is at least indirectly controlled by one of the temperature measuring elements electrically operated burner valve is arranged.
  • the heating gas is preferably removed in a manner known per se from a collecting container in the gas phase, which is outside the immediate effect of the evaporator heating, and a third temperature measuring element is preferably present in the collecting container, which at least falls below a low temperature indirectly the evaporator heating interrupts and / or the inlet valve closes in order to meet the standard regulations in the event of flooding.
  • a fourth temperature measuring element is now present near the third temperature measuring element and in particular on the gas collecting container, which at least indirectly interrupts the evaporator heating and / or blocks the inlet valve if the temperature falls below a minimum or if the third temperature measuring element fails.
  • this minimum temperature must be below the low temperature so that the safety circuit does not take effect prematurely and, moreover, the third and fourth temperature measuring elements should be close together so that the measured temperature values are actually comparable.
  • a changeover valve is arranged in the gas supply line to the evaporator, through which alternatively a region containing the gas phase and the region containing the liquid phase of a liquefied petroleum gas installation can be connected to the evaporator.
  • an arbitrarily actuable hand switch is advantageously arranged in the electrical circuit for the burner valve and / or the input valve, with which at least one of these valves can be activated even when interrupted by the safety circuit. Commissioning of the evaporator or the evaporator heating is thus possible, the automatic system being switched off by this arbitrary intervention. However, since this is an arbitrary intervention, the immediate control does not endanger safety. As soon as the switch is released, the safety system is fully effective again,
  • the circuit is, according to an advantageous embodiment of the invention can only be closed when the changeover valve is set to gas phase.
  • Fig. 1 is a diagram of the gas or electric line system of an evaporator-3 and Fig. 2, the electrical circuit diagram for this.
  • the liquid gas is fed to the liquid gas evaporator 1 from a gas container via a line 3 as the first line section, in which a solenoid valve is arranged as an inlet valve 4.
  • a changeover valve 5 which is connected on the one hand via a liquid gas line 6 to the part of the container 2 which is in the liquid phase and on the other hand via a gas line 7 to the part of the gas container which contains the gas in the vapor state 2.
  • the changeover valve 5 connects the part of the gas container 2 carrying gas vapor via the line 7 to the gas line 3 and, after the operating temperature has been reached, switches to the liquid phase, after which the liquid gas containing part of the container 2 is connected to the gas line 3 via the liquid gas line 6.
  • the gas lines 6 and 7 there are additional shut-off valves 8.
  • the gas line 3 leads to evaporator coils 9, which end in a collecting line 11 as a second line section, which leads to a control tube 12 which now serves as a gas collection container and carries gas vapor.
  • a gas line 13 leading to the consumer branches off in front of the control tube 12, in which a shut-off valve 14 and a pressure valve 15 are arranged.
  • a heating gas line 16 branches off from the control tube 12 and ends in a distribution line 17, which ends at burners 18.
  • a burner magnetic valve 19, a pressure valve 21, a gas filter 22 and an energy regulator 23 in the form of an automatic gas regulator are arranged in the heating gas line 16 one after the other in the flow direction.
  • a control chamber 20 for controlling the heating energy at the hottest point, in which a first thermostat 24 is arranged, which is connected to the energy regulator 23 via a dash-dotted capillary line 25.
  • a temperature in this gas phase of c. Controlled 60 +/- 10 ° C, wherein the evaporator 1 can be operated via the energy regulator 23 with different loads.
  • a second thermostat 26 serving as a safety thermostat is provided in the control chamber 20 of the manifold 11 and actuates an electrical switch 28 via a capillary line 27, which is arranged in the electric line 29 of the two solenoid valves 4 and 19.
  • the switch 28 opens so that both solenoid valves 4 and 19 close, whereby the liquid gas evaporator 1 is put out of operation.
  • an electrical preheating 32 shown in broken lines in FIG. 1, is preferably present in the form of a heating tape which the evaporator 1 must first be preheated to an operating temperature of approximately 60 ° C.
  • an electrical switch 31 is actuated in the electrical line 32 of the preheating in order to switch off the heating. This switch 31 is actuated by a double thermostat arranged in the control tube 12 and not shown.
  • a third thermostat 33 is arranged in the control tube 12 and only closes a switch 34 in the electric line 29 when temperatures of at least 40 ° C. are reached in the control tube 12. ie when a temperature is reached which ensures that gas in the vapor state can flow to the evaporation burners 18. As soon as the temperature in the control tube 12 drops below 40 ° C., the switch opens again and the solenoid valves 4 and 19 close.
  • a fourth thermostat 35 which detects a minimum temperature of approx. 30 ° C., interrupts a switch 37 in the electrical line 29 via a capillary line 36 when the temperature in the control tube 12 drops below 30 ° C. From this temperature there is a risk of condensation of the fuel, which can result in flooding.
  • Another, fourth thermostat 38 is arranged in the control tube 12 and actuates a switch 39, which is also arranged in the electrical line 29 of the solenoid valves 4 and 19 and which then interrupts the electrical current when the temperature in the control tube 12 is at a certain temperature, for example 80 ° C exceeds. This ensures that the desired temperature of the gas phase also prevails in the control tube 12, from which the gas outflow then takes place.
  • the electrical line 29 has a bypass 41, in which an unactuated open and arbitrarily actuated push button switch 42 is arranged.
  • An electrical main switch 43 is assigned to the electrical system of this evaporator 1, from which, as can be seen particularly clearly from the circuit diagram in FIG. 2, the individual electrical ones Aggregates can be put into operation at all.
  • the electrical switch 31 assumes the position shown in FIG. 2, in which the electrical preheater 30 comes into operation, for example with two heating bands of 700 watts and 1250 watts until the operating temperature is reached and the double thermostat 44 switches the preheating off.
  • the solenoid valves 4 and 19 are closed because their circuit is interrupted by at least one of the switches 28, 34, 37 or 39.
  • the electrical circuit diagram does not show that the bypass should only be effective when the changeover valve 5 (FIG. 1) is in the gas phase of the gas container 2 connects to the evaporator 1. However, this can be done simply by means of a corresponding switch in the electrical bypass circuit which is actuated by the changeover valve 5.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Control Of Combustion (AREA)

Abstract

Procédé et dispositif permettant d'évaporer du gaz liquide dans un évaporateur à l'aide d'une commande de température (16-23) du moyen de chauffage (9) de l'évpaorateur, et d'un dispositif de sécurité coupant l'alimentation (3) de gaz liquide ou le moyen de chauffage (18) de l'évaporateur, lorsque la température dépase une température maximum ou chute en dessous d'une température minimum. Un dispositif de sécurité supplémentaire commandé par les éléments de mesure de température (26, 35 ou 38) coupe l'alimentation de liquide (3, 4) ou le moyen de chauffage de l'évaporateur, lorsque la température dépasse une température de limite de sécurité supérieure à la température maximum, ou chute en dessous d'une température basse inférieure à la température minimum.
PCT/DE1988/000550 1986-09-18 1988-09-08 Procede et dispositif destines a un evaporateur de gaz liquide WO1989002561A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019890700874A KR890701949A (ko) 1986-09-18 1988-09-08 액화가스의 증발방법 및 장치

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3731356.8 1986-09-18
DE19873731356 DE3731356A1 (de) 1987-09-18 1987-09-18 Verfahren und vorrichtung fuer einen fluessiggasverdampfer

Publications (1)

Publication Number Publication Date
WO1989002561A1 true WO1989002561A1 (fr) 1989-03-23

Family

ID=6336294

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1988/000550 WO1989002561A1 (fr) 1986-09-18 1988-09-08 Procede et dispositif destines a un evaporateur de gaz liquide

Country Status (3)

Country Link
KR (1) KR890701949A (fr)
DE (1) DE3731356A1 (fr)
WO (1) WO1989002561A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102748744A (zh) * 2012-08-02 2012-10-24 宁夏三新热超导技术有限公司 多井口单体组合式天然气加热炉

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5173155A (en) * 1990-09-28 1992-12-22 Tokyo Gas Co., Ltd Vacuum boiler type evaporator
ES2143891B1 (es) * 1996-06-04 2000-12-01 Gesa Gas S A Instalacion de produccion de aire propanado.
US6584998B1 (en) * 2000-03-31 2003-07-01 Innovative Engineered Solutions, Llc Apparatus and method for regulating gas flow
ES2235646B1 (es) * 2003-12-22 2006-03-16 Ros Roca Indox Equipos E Ingenieria, S.L. Planta movil de regasificacion de gnl.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712073A (en) * 1971-02-03 1973-01-23 Black Sivalls & Bryson Inc Method and apparatus for vaporizing and superheating cryogenic fluid liquids
DE2207268A1 (de) * 1972-02-16 1973-09-06 Friedrich Scharr Ohg Fluessiggasverdampfer
FR2443640A1 (fr) * 1978-12-07 1980-07-04 Equip Indls Et Procede et dispositif pour produire un gaz a partir de sa phase liquide et pour le rechauffer a sa temperature d'utilisation
EP0213553A2 (fr) * 1985-09-02 1987-03-11 Hildegard Berger Régulation de température d'un évaporateur

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712073A (en) * 1971-02-03 1973-01-23 Black Sivalls & Bryson Inc Method and apparatus for vaporizing and superheating cryogenic fluid liquids
DE2207268A1 (de) * 1972-02-16 1973-09-06 Friedrich Scharr Ohg Fluessiggasverdampfer
FR2443640A1 (fr) * 1978-12-07 1980-07-04 Equip Indls Et Procede et dispositif pour produire un gaz a partir de sa phase liquide et pour le rechauffer a sa temperature d'utilisation
EP0213553A2 (fr) * 1985-09-02 1987-03-11 Hildegard Berger Régulation de température d'un évaporateur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102748744A (zh) * 2012-08-02 2012-10-24 宁夏三新热超导技术有限公司 多井口单体组合式天然气加热炉

Also Published As

Publication number Publication date
KR890701949A (ko) 1989-12-22
DE3731356A1 (de) 1989-03-30
DE3731356C2 (fr) 1989-06-29

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