US20030079857A1 - Method for detecting abnormality in process for exchanging heat - Google Patents

Method for detecting abnormality in process for exchanging heat Download PDF

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Publication number
US20030079857A1
US20030079857A1 US10/173,806 US17380602A US2003079857A1 US 20030079857 A1 US20030079857 A1 US 20030079857A1 US 17380602 A US17380602 A US 17380602A US 2003079857 A1 US2003079857 A1 US 2003079857A1
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Prior art keywords
gas
heating medium
process fluid
exchanging heat
fused salt
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US10/173,806
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English (en)
Inventor
Yasuhiko Mori
Kiyoshi Ota
Eisaburo Miyata
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Sumitomo Chemical Co Ltd
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Sumitomo Chemical Co Ltd
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Assigned to SUMITOMO CHEMICAL COMPANY, LIMITED reassignment SUMITOMO CHEMICAL COMPANY, LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MIYATA, EISABURO, OTA, KIYOSHI, MORI, YASUHIKO
Publication of US20030079857A1 publication Critical patent/US20030079857A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0006—Controlling or regulating processes
    • B01J19/002—Avoiding undesirable reactions or side-effects, e.g. avoiding explosions, or improving the yield by suppressing side-reactions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • G01M3/226—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators
    • G01M3/228—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators for radiators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00191—Control algorithm
    • B01J2219/00193—Sensing a parameter
    • B01J2219/00204—Sensing a parameter of the heat exchange system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00191—Control algorithm
    • B01J2219/00222—Control algorithm taking actions
    • B01J2219/00227—Control algorithm taking actions modifying the operating conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00245—Avoiding undesirable reactions or side-effects
    • B01J2219/00268—Detecting faulty operations

Definitions

  • the present invention relates to a method for detecting abnormality in a process for exchanging heat between a heating medium and a process fluid.
  • a fused salt, water or the like is used as a heating medium to adjust a temperature of a process fluid to a predetermined level by exchanging heat between the heating medium and the process fluid.
  • the fused salt which is a mixture of sodium nitrite (NaNO 2 ), sodium nitrate (NaNO 3 ) potassium nitrate (KNO 3 ) and the like, is characterized by (1) excellent heat transfer properties, (2) remarkable chemical stability under high temperatures, (3) easy temperature control, and the like. Therefore, the fused salt is used as a heating medium for heating or cooling various process fluids in high temperatures.
  • the process fluid can sometimes leak from a pipe and the like into the heating medium side of a heat exchanger during heat exchanging due to erosion of the pipe and the like. Therefore, various methods have been studied to detect the leakage of process fluid. For example, there has been proposed a method of detecting the heat of the reaction, which is generated by the reaction between a leaked process fluid and a heating medium, by measuring temperatures. However, the method has risks of secondary disasters such as the leakage of the heating medium, the process fluid and the like outside and explosion by the time when the abnormality is detected since it takes a considerably long period of time for the temperature to be raised to a degree which triggers the detection of abnormality after the leakage of process fluid.
  • An object of the present invention is to provide a method for detecting abnormality in a process for exchanging heat between a heating medium and a process fluid, which can promptly detect a leakage of the process fluid.
  • the present invention provides a method for detecting abnormality in a process for exchanging heat between a heating medium and a process fluid comprising the step of detecting a gaseous component at a gas phase in a flow path of the heating medium, wherein the gaseous component is generated by contact of the heating medium with the process fluid. It is possible to promptly detect a leakage of the process fluid by this method.
  • the leakage of the process fluid is promptly detected by detecting nitrogen oxide gas and combustible gases which are generated by the reaction between the heating medium and the process fluid.
  • nitrogen oxide gas include NO gas, NO 2 gas, N 2 O gas and the like.
  • combustible gases include dimethyl sulfide, carbon disulfide, methane, hydrogen sulfide and the like which change with the process fluid used.
  • the flow path of the heating medium in the present invention is not particularly limited so far as the heating medium flows through it.
  • equipments constituting the flow path include a heat exchanger, a pipe, a tank, a pump, a filter and the like, which are a heat exchanger and associated equipments thereof.
  • the gas phase in a flow path of the heating medium in the present invention is a gas part which is formed in the above equipment, and vent lines thereof are included too in it.
  • FIG. 1 is a schematic diagram showing an embodiment of a method for detecting abnormality in a process for exchanging heat according to the present invention
  • FIG. 2 is a schematic diagram showing a testing apparatus, which was used in Reference Example 1 of the present invention.
  • FIG. 3 is a graph showing results of a calorimetry using an isoperibolic calorimeter in Reference Example 1 of the present invention
  • FIG. 4 is a graph showing another results of calorimetry using an isoperibolic calorimeter in Reference Example 1 of the present invention.
  • FIG. 5 is a schematic diagram showing a testing apparatus which was used in Reference Example 2 of the present invention.
  • FIG. 6 is a schematic diagram showing a testing apparatus, which was used in Reference Example 3 of the present invention.
  • FIG. 1 is a schematic diagram showing an embodiment of a method for detecting abnormality in a process for exchanging heat according to the present invention.
  • a method of the present invention detecting the abnormality enables a detection of the leakage of the process fluid by a gas detector 5 which is provided in a gas phase 7 of the heating medium tank to detect at least one of the gaseous components.
  • the heat exchanger 1 is not particularly limited so far as it exchanges heat between the process fluid and the heating medium through a partition such as a pipe or a plate, for example, a shell and tube type heat exchanger, a plate type heat exchanger, a spiral type heat exchanger, a block type heat exchanger and the like, which are a partition type heat exchanger, may be used.
  • a partition such as a pipe or a plate
  • a shell and tube type heat exchanger for example, a shell and tube type heat exchanger, a plate type heat exchanger, a spiral type heat exchanger, a block type heat exchanger and the like, which are a partition type heat exchanger, may be used.
  • the heat exchanger includes a heat exchanger only exchanging heat and a reactor exchanging heat together with a reaction such as a shell and tube type reactor in which a catalyst is packed.
  • a fused salt, water and the like may be used as described above.
  • a composition containing at least NaNO 2 in the range of about 20 to about 90 wt % and having a melting point of about 100 to about 200° C. may preferably used.
  • the composition may preferably comprise about 20 to about 50 wt % of NaNO 2 , about 5 to about 15 wt % of NaNO 3 and about 45 to about 65 wt % of KNO 3 .
  • the composition may preferably comprise about 20 to about 90 wt % of NaNO 2 and about 80 to about 10 wt % of KNO 3 .
  • the compositions include a composition (melting point 142° C.) comprising about 40 wt % of NaNO 2 , about 7 wt % of NaNO 3 and about 53 wt % of KNO 3 , a composition (melting point 152° C.) comprising about 34 wt % of NaNO 2 , about 13 wt % of NaNO 3 and about 53 wt % of KNO 3 , a composition (melting point 139° C.) comprising about 50 wt % of NaNO 2 and about 50 wt % of KNO 3 , and the like.
  • water may be added to the fused salts to lower solidifying points thereof and facilitate temperature controls thereof.
  • the process fluid is not particularly limited so far as the gaseous component generated by contact of the heating medium with the process fluid are detected at the gas phase 7 in the flow path of the heating medium when the process fluid flows into the flow path of the heating medium.
  • process fluids include (a) a process fluid containing acidic substances such as HCl, Cl 2 , H 2 SO 4 and the like, (b) a process fluid containing H 2 S gas, (c) a process fluid containing methyl mercaptane gas, and the like.
  • nitrogen oxide gas generates in the case of (a)
  • gases such as nitrogen oxide, CO 2 and the like generate in the case of (b)
  • gases such as dimethyl disulfide, nitrogen oxide, CS 2 , CH 4 , H 2 S and the like generate in the case of (c).
  • the heating medium is the fused salt containing NaNO 2 and the process fluid is the process fluid (a) which contains HCl, Cl 2 , O 2 and the like which are used in a process of oxidizing HCl to produce Cl 2 .
  • the process fluid is introduced into the reactor (heat exchanger) 1 through a pipe 2 to be heat-exchanged with the fused salt in the course of the reaction in the reactor (heat exchanger) 1 and then sent to the succeeding process through a pipe 10 .
  • the fused salt which temperature is raised due to the heat exchange with the process fluid, is sent to a heating medium tank 4 through a pipe 3 .
  • a predetermined amount of the fused salt is stored in this heating medium tank 4 which is formed of a liquid phase 6 (fused salt) and a gas phase 7 .
  • the fused salt of the liquid phase 6 is fed to a cooler 9 by a pump 8 to be cooled and then fed to the heat exchanger 1 again.
  • a controlled potential electrolysis type NOx detector or an infrared ray type NOx detector may be used as the detector 5 , and concrete examples thereof include a controlled potential type NOx meter manufactured by New Cosmos Co., Ltd.
  • the method for detecting abnormality in a process for exchanging heat of the present invention is not limited to the above embodiment so far as the gaseous component generated by contact of the heating medium with the process fluid can be detected at the gas phase in the flow path of the heating medium if the heating medium and the process fluid are mixed.
  • concrete examples may be a process wherein NOx gas is generated, in a process for exchanging heat in the course of obtaining acrolein by oxidation of propylene, as a result of a heat decomposition of NaNO 2 due to heat of reaction generated by contact of acrolein in a process fluid with a fused salt.
  • Reference Example 1 was conducted under an assumption that the process fluid containing HCl and Cl 2 leaked to be mixed with the fused salt containing NaNO 2 , which is described in the above embodiment, and then nitrogen oxide gas and heat generated were evaluated.
  • FIG. 2 is a schematic diagram showing the whole scheme of a testing apparatus.
  • an isoperibolic calorimeter 22 (RADEX-SOLO manufactured by ASI Co. Ltd.), for estimating the risk of the mixing of the fused salt containing NaNO 2 and the gas containing HCl and Cl 2 , and absorption bottles 47 and 49 absorbing generated gases were provided in a draft 54 .
  • the isoperibolic calorimeter was used with modifying one of the above commercially-available isoperibolic calorimeter in such a manner that a sample supply pipe 52 and a gas collection pipe 28 are added to a sample container 23 in order to supply the gas containing HCl and Cl 2 continuously as well as to collect the generated gas.
  • the isoperibolic calorimeter 22 has a structure in such a manner that the gas is continuously supplied from the sample supply pipe 52 to the sample container 23 which holds the fused salt, and the gas generated by the mixing is discharged from the gas collection pipe 28 which is covered with a ribbon heater 27 . It is possible to heat the sample container 23 through a jacket 24 using a heater 25 and, therefore, the heat and the gas which are generated by the mixing of the supply gas and the fused salt 53 described above can be evaluated under any heating rate or isoperibolic condition. The temperature of the fused salt 53 is measured with a temperature sensor 26 .
  • the gases supplied from a nitrogen cylinder 31 , a hydrogen chloride cylinder 32 , a chlorine cylinder 33 and an oxygen cylinder 34 are adjusted to be predetermined ratios by means of valves 38 , 39 , 40 and 41 and flow meters 35 , 36 and 37 so that the supply gas is supplied through the sample supply pipe 52 to the sample container 23 .
  • Oxygen, which is supplied from the oxygen cylinder 34 is passed through pure water 45 which is heated in a thermostat 44 and then incubated by a ribbon heater 46 to be supplied to the sample container 23 together with water vapor.
  • Tests were conducted under the heating condition (Test 1) and the isoperibolic condition (Test 2), and composition ratios of the gases supplied to the sample container 23 were as shown in Table 1.
  • TABLE 1 Charging amounts of Composition and components of gas supplied Temperature charging amount to sample container Test condition of fused salt (cc/min)
  • Test 1 Heating NaNO 2 40 wt % ⁇ Composition 1> condition NaNO 3 7 wt % Oxygen 10.0 0.5 KNO 3 53 wt % Water 0.6 (° C./min.) Chlorine 0.9 Charging amount Hydrogen chloride 18.9 6.81 (g) Total feed rate 30.4
  • Test 2 Isoperibolic NaNO 2 40 wt % ⁇ Composition 2> condition NaNO 3 7 wt % Oxygen 4.2 280 (° C.) KNO 3 53 wt % Water vapor 7.1 Charging amount Chlorine 7.3 6.30 (g) Hydrogen chloride 1.4 Total feed rate 20.0 ⁇ Composition 3> Oxygen
  • Test 1 was conducted using the gas of Composition 1 as the supply gas to the sample container 23 under the heating condition of 0.5° C./min. At the initial stage of Test 1, only nitrogen gas was supplied to the sample container 23 , and then the supply of nitrogen gas was terminated when a temperature of the fused salt 53 had reached to about 70° C. to start supply of the gas of Composition 1. The result of Test 1 is shown in FIG. 3.
  • Test 2 was conducted using the gas of Composition 2 as the supply gas to the sample container 23 under the isoperibolic condition (heater temperature: 280° C.), followed by using the gas of Composition 3 under the same isoperibolic condition.
  • the result of Test 2 is shown in FIG. 4.
  • Reference Example 2 was conducted under an assumption that the process fluid containing H 2 S leaked to be mixed with the fused salt containing NaNO 2 , and gases, which were generated by the mixing, were evaluated.
  • FIG. 5 is a schematic diagram showing the whole scheme of the testing apparatus.
  • the sample container 62 has a collection pipe 65 for collecting the gas generated by the mixing. The generated gas is collected through the collection pipe 65 into a so-called Tedler bag 66 (sampling bag made of the polyvinylfluoride film Tedler® manufactured by du Pont de Nemours and Company).
  • the H 2 S gas is supplied from a H 2 S cylinder 67 .
  • a container 68 for draining Between the H 2 S cylinder 67 and the supply pipe 64 , there are disposed a container 68 for draining, a valve 69 for adjusting a gas feed rate and a gas flow meter 70 .
  • a thermocouple 71 for measuring temperature of the H 2 S gas is provided in the container 68 for draining.
  • Results of the tests are shown in Table 2.
  • TABLE 2 Test 3 Test 4 Test 5 Test 6 Charging 6 g 9.1 g 16 g 0 amount of fused salt Temperature 400° C. 410° C. 400° C. of thermostat H 2 S gas feed 20 ⁇ 30 20 ⁇ 30 20 ⁇ 30 rate cm 3 /min cm 3 /min cm 3 /min Method of Gas Gas Detection Gas analysis of chromato- chromato- tube and chromato- collected graphy graphy combustible graphy gas gas detector Results of N 2 O N 2 O NO 2 330 ppm H 2 S analysis of CO 2 CO 2 NO 170 ppm collected H 2 O H 2 O SO 2 50 ppm gas Combustible gas 0.7% Remarks A large A large The amount of amount of N 2 O concentration N 2 O gas was gas was of H 2 S gas was generated. generated. below the Heat was Heat was detection generated by generated by limit (0.1 the mixing. the mixing. ppm or less). Heat was generated by the mixing.
  • Reference Example 3 was conducted under an assumption that the process fluid containing methyl mercaptane gas leaked to be mixed with the fused salt containing NaNO 2 , and gases, which were generated by the mixing, were evaluated.
  • FIG. 6 is a schematic diagram showing the whole scheme of the testing apparatus.
  • the sample container 62 has a collection pipe 65 for collecting the gases generated by the mixing. The generated gases were collected through the collection pipe 65 into a Tedler bag 66 .
  • the above methyl mercaptane gas was generated by heating a methyl mercaptane solution in a container 74 by a silicon oil which temperature was adjusted by a thermostatic circulation bath 75 . Between the container 74 and the supply pipe 64 , there were disposed a container 68 for draining, a valve 69 for adjusting a gas feed rate and a gas flow meter 70 . In the container 68 for draining, a thermocouple 71 for measuring temperature of the methyl mercaptane gas was provided.
  • Results of the tests are shown in Table 3.
  • TABLE 3 Test 7 Test 8 Test 9 Charging 6 g 10 g 0 amount of fused salt Temperature 420° C. 420° C. of thermostat Methyl- 20 ⁇ 100 20 ⁇ 100 mercaptane cm 3 /min cm 3 /min gas feed rate
  • Method of Gas Gas chroma- Gas analysis of chromatography tography, detection chroma- collected tube and combust- tography gas ible gas detector Results of Dimethyl The same gases as Dimethyl analysis of disulfide, CO 2 , that of Test 7 were disulfide, collected N 2 O, CS 2 , dimethyl detected by gas CO 2 , H 2 S, gas sulfide, CH 4 , H 2 S, chromatography.
  • H 2 O, methanol, ethylene, carbonyl 10 ppm of NO 2 was CS 2 .
  • sulfide, dimethyl detected by the trisulfide, SO 2 analysis using the ethane, H 2 O, detection tube.
  • propylene, 7% of a combustible isobutene, 1,2- gas was detected by propadiene, the analysis using methanol, the combustible gas acetonitrile. detector.
  • Remarks A large amount of The concentration N 2 O gas was of NO gas was generated. below the detection Heat was generated limit of the detec- by the mixing. tion tube (5 ppm or less). Heat was generated by the mixing.
  • dimethyl disulfide, nitrogen oxide (NO 2 , N 2 O), CS 2 , CH 4 and H 2 S would be effectively used as subjects for the detection of leakage in the process using the fused salt containing NaNO 2 and the process fluid containing methyl mercaptane.
  • An oxidation reaction of hydrogen chloride was conducted by feeding 150 kg/h of HCl gas and 44 kg/h of O 2 gas to a shell and tube type reactor 1 packed with a ruthenium type catalyst.
  • a heating medium comprising 50 wt % of NaNO 2 and 50 wt % of NaNO 3 and having a temperature of 340° C. was hold in a heating medium tank 4 .
  • a controlled potential electrolysis type NOx meter manufactured by New Cosmos Co., Ltd. was provided at a gas phase 7 of the heating medium tank 4 .
  • a necessary amount of a heating medium for removal of the heat of the reaction was supplied to a cooler 9 by a circulation pump 8 and cooled to 250° C.
  • the removal of the heat of the reaction was conducted by supplying the cooled heating medium to a shell side of the reactor 1 .
  • a temperature of a process gas in the reactor 1 was 350° C. and a temperature of a heating medium discharged from the shell of the reactor was 340° C.
  • a process gas comprising 23 kg/h of HCl, 124 kg/h of Cl 2 , 16 kg/h of O 2 and 31 kg/h of H 2 O was discharged from the reactor.
  • a leakage of the process fluid can be promptly detected by detecting a gaseous component generated by contact of the heating medium with the process fluid.

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
US10/173,806 2001-06-26 2002-06-19 Method for detecting abnormality in process for exchanging heat Abandoned US20030079857A1 (en)

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US (1) US20030079857A1 (enrdf_load_stackoverflow)
EP (1) EP1271122A3 (enrdf_load_stackoverflow)
KR (1) KR20030001319A (enrdf_load_stackoverflow)
CN (1) CN1393679A (enrdf_load_stackoverflow)
BR (1) BR0202377A (enrdf_load_stackoverflow)
HU (1) HUP0202047A3 (enrdf_load_stackoverflow)
SG (1) SG95695A1 (enrdf_load_stackoverflow)
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Cited By (4)

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US20080071109A1 (en) * 2004-05-19 2008-03-20 Mitsubishi Chemical Corporation Process For Producing (Meth)Acrolein Or (Meth)Acrylic Acid
US7454956B1 (en) 2005-09-22 2008-11-25 Lopresti William J Heat exchanger leak detection using mass gas flow metering
US10458879B2 (en) * 2014-10-24 2019-10-29 Proactive Analytics Limited Leak testing method and apparatus for use with heat exchangers
CN118329303A (zh) * 2024-04-29 2024-07-12 北京怀柔实验室 熔盐泄漏检测系统、烟气熔盐换热系统、熔盐泄漏检测方法

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TW200902151A (en) * 2007-02-12 2009-01-16 Basf Ag Method for leakage monitoring in a tube bundle reactor
KR101125836B1 (ko) * 2009-09-01 2012-03-28 조남영 용융염을 이용한 난방장치
JP2011145126A (ja) * 2010-01-13 2011-07-28 Sumitomo Chemical Co Ltd 熱交換プロセスの異常検知方法
JP2011145125A (ja) * 2010-01-13 2011-07-28 Sumitomo Chemical Co Ltd 熱交換プロセスの異常検知方法
TW201129764A (en) * 2010-02-24 2011-09-01 Zi-Bo Gao Heating device
JP2015081695A (ja) * 2013-10-21 2015-04-27 三菱日立パワーシステムズ株式会社 炭素含有燃料熱交換器の監視・運転方法
JP6473965B2 (ja) * 2015-02-06 2019-02-27 Smc株式会社 安全機構付き冷却液供給装置及び熱負荷の冷却方法
US20170292798A1 (en) * 2016-04-06 2017-10-12 Fluor Technologies Corporation Leak detection in heat exchanger systems
DE102017211311A1 (de) * 2017-07-04 2019-01-10 Heraeus Deutschland GmbH & Co. KG Prozesssteuerung mit Farbsensor

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US6035700A (en) * 1997-10-10 2000-03-14 Apv Corporation Method of leak testing an assembled plate type heat exchanger

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JPH0217372A (ja) * 1988-07-06 1990-01-22 Mitsubishi Electric Corp 化学反応器
JPH03248031A (ja) * 1990-02-27 1991-11-06 Mitsubishi Heavy Ind Ltd 漏洩個所の特定方法

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US3975943A (en) * 1973-08-23 1976-08-24 Electricite De France (Service National) Method for detecting steam leakage in heat-exchanger having circulation tubes surrounded by liquid sodium and devices for the application of said method
US6035700A (en) * 1997-10-10 2000-03-14 Apv Corporation Method of leak testing an assembled plate type heat exchanger

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080071109A1 (en) * 2004-05-19 2008-03-20 Mitsubishi Chemical Corporation Process For Producing (Meth)Acrolein Or (Meth)Acrylic Acid
US7868202B2 (en) 2004-05-19 2011-01-11 Mitsubishi Chemical Corporation Process for producing (meth)acrolein or (meth)acrylic acid
US7454956B1 (en) 2005-09-22 2008-11-25 Lopresti William J Heat exchanger leak detection using mass gas flow metering
US10458879B2 (en) * 2014-10-24 2019-10-29 Proactive Analytics Limited Leak testing method and apparatus for use with heat exchangers
CN118329303A (zh) * 2024-04-29 2024-07-12 北京怀柔实验室 熔盐泄漏检测系统、烟气熔盐换热系统、熔盐泄漏检测方法

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HUP0202047A3 (en) 2004-07-28
TW534972B (en) 2003-06-01
BR0202377A (pt) 2003-04-29
SG95695A1 (en) 2003-04-23
CN1393679A (zh) 2003-01-29
HU0202047D0 (enrdf_load_stackoverflow) 2002-08-28
EP1271122A2 (en) 2003-01-02
HUP0202047A2 (hu) 2003-08-28
EP1271122A3 (en) 2004-03-10
KR20030001319A (ko) 2003-01-06

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