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21. 发明专利

JPS58166912A REMOVING DEVICE OF IRON OXIDE CONTAINED IN WATER OF WATER FEEDING SYSTEM IN POWER PLANT 失效
公开(公告)号：JPS58166912A
公开(公告)日：1983-10-03
申请号：JP4742782
申请日：1982-03-26
申请人： HITACHI LTD
发明人： SUZUKI MAMORU , SUZUKI KATSUMI , ITOU KAZUTOSHI , MINATO AKIRA , KANBAYASHI TAKESHI , HOSHINO YOSHIYUKI
IPC分类号： B01D35/06 , F01K9/00 , F01K21/00
摘要： PURPOSE:To obtain boiler feed water having excellent quality, and to enhance an efficiency of a power plant, by providing an iron oxide removing device which incorporates permanent magnets, to the downstream of a water storing tank of deaerator to which drain is returned from a high-pressure feed water heater. CONSTITUTION:A feed water piping 11 connected to a low-pressure feed water heater 8 and a drain piping 17C connected to a high-pressure feed water heater 13 are respectively connected to the upper part of a deaerator 9 and; an iron oxide removing device 20 constructed by attaching permanent magnets 21 to supporting rods 22 is connected to a feed water piping 11 installed between a water storing tank 10 of the deaerator and a feed water pump 12. Here, the drain water of heater 13 containing a large amount of iron, and the feed water introduced from the heater 8 are flowed together in a confluent state; and after deaeration, eluted iron carried into the feed water from the heater 8 and iron oxides produced in the drain piping connected to the heater 13 are attracted and removed by a magnet 21 in the removing device 20.

22. 发明专利

JPS5844147B2 失效
公开(公告)号：JPS5844147B2
公开(公告)日：1983-10-01
申请号：JP8015479
申请日：1979-06-27
申请人： HITACHI LTD
发明人： ITO MASAHIKO , MIDORIKAWA HEIHACHIRO , MINATO AKIRA , KUBO MITSURU
IPC分类号： C23C2/02

23. 发明专利

JPS5892849A DETECTING METHOD FOR SERVICE LIFE OF REMOVING REAGENT OF GASEOUS HYDROGEN 失效
公开(公告)号：JPS5892849A
公开(公告)日：1983-06-02
申请号：JP18918881
申请日：1981-11-27
申请人： HITACHI LTD
发明人： MIDORIKAWA HEIHACHIROU , ITOU MASAHIKO , MINATO AKIRA , MACHIZAWA KENJI
IPC分类号： F25B43/04 , G01N27/12
摘要： PURPOSE:To detect automatically the life of a removing reagent of gaseous hydrogen generated especially from a closed circulation type absorption refrigerator with high accuracy, by forming a metallic oxide thin film on the inner surface of a ceramic tube as the removing reagent of gaseous hydrogen and detecting the variation of electric conductivity of this film. CONSTITUTION:A detector 5 for gaseous hydrogen removing reagent is obtained e.g. by forming a Cu thin film and heating said film at 500 deg.C in the atmosphere to form a CuO thin film 2 of 100-1,000Angstrom thickness on the inner surface of a ceramic tube 1 in the neighborhood of a gas exit 4 of a gaseous hydrogen removing reactor 3 in a hydrogen removing apparatus of a closed circulation type absorption refrigerator carrying out concentration of an aqueous LiBr solution, dilution of a cooling medium and heat exchange. This detector 5 is used by fixing with a packing 8 made of stainless steel on the exit 4 of the hydrogen removing apparatus. When the CuO in the reactor 3 loses the H2 removing capacity, the film 2 of the detector 5 becomes CuO Cu2O Cu and the face that the electric conductivity is varied is detected. The detection is carried out during unmanned operation of the refrigerator and safety operation is carried out by changing over the reactor 3 to a preliminary device 13 because 0.1ppm H2 concentration can be detected.

24. 发明专利

JPS5815704A EQUIPMENT FOR REMOVING IRON OXIDES FROM FEED WATER OF POWER PLANT 失效
公开(公告)号：JPS5815704A
公开(公告)日：1983-01-29
申请号：JP11347481
申请日：1981-07-22
申请人： HITACHI LTD
发明人： SUZUKI MAMORU , SUZUKI KATSUMI , ITOU KAZUTOSHI , MINATO AKIRA , HOSHINO YOSHIYUKI
IPC分类号： F01K9/00 , B01D19/00 , B08B9/027 , F22B37/54 , F22D1/28 , F22D1/30 , F22D11/00
摘要： PURPOSE:To efficiently remove iron oxides from feed water, by providing permanent magnets in the deaeration chamber of a deaerator to which drained water from a high-pressure feed water heater is returned. CONSTITUTION:A feed water pipe 21 connected to a low-pressure feed water heater and a drain pipe 18c for a high-pressure feed water heater are connected to the top of a deaerator 10. A heating steam pipe 25 coupled to a boiler is connected to the side of the deaerator 10. A plurality of permanent magnets 27 are provided at the bottom of a deaeration chamber 28. As a result, iron oxides are efficiently removed from the feed water system to obtain boiler feed water of good quality to heighten the operation efficiency of a thermal power plant.

25. 发明专利

JPS5760078A Pickling methof for metal 失效
标题翻译：金属化合物
公开(公告)号：JPS5760078A
公开(公告)日：1982-04-10
申请号：JP13435280
申请日：1980-09-29
申请人： Hitachi Ltd
发明人： HASEGAWA TAKASHI , FURUYA YASUMASA , MINATO AKIRA , ITOU HISAO
IPC分类号： C23G1/02 , C23G1/08
CPC分类号： C23G1/08
摘要： PURPOSE:To prevent the corrosion of stainless steel or the like inexpensively and simply during pickling by dipping the steel in a pickling soln. at a low temp. prior to the pickling. CONSTITUTION:When stainless steel or the like is pickled at a high temp., it is dipped in a pickling soln. with low corrosiveness at a temp. below the pickling temp. to form a stable coat on each steel surface. After slowly raising the temp. of the pickling soln., the steel is pickled at the prescribed temp. Since no corrosion inhibitor is used, this method produces a high pickling effect. The stable coat on the steel surface is not spoiled by the pickling at the high temp., so that corrosion of the steel surface can be prevented effectively.
摘要翻译：目的：通过将钢浸渍在酸洗中，防止酸洗过程中廉价且简单地腐蚀不锈钢等。在低温在酸洗之前。构成：当不锈钢等在高温下酸洗时，浸入酸洗液中。在温度下具有低腐蚀性。低于酸洗温度以在每个钢表面上形成稳定的涂层。缓慢升温后的酸洗，钢在规定的温度下酸洗。由于不使用缓蚀剂，因此该方法产生高酸洗效果。钢表面的稳定涂层在高温下不会被酸洗破坏，从而可以有效地防止钢表面的腐蚀。

26. 发明专利

JPS5724689A Removal of iron oxide from drain system water in power generating plant and apparatus therefor 失效
标题翻译：发电厂排放系统水中氧化铁的去除及其设备
公开(公告)号：JPS5724689A
公开(公告)日：1982-02-09
申请号：JP9753580
申请日：1980-07-18
申请人： Hitachi Ltd
发明人： SUZUKI MAMORU , SUZUKI KATSUMI , ITOU KAZUTOSHI , MINATO AKIRA , KANBAYASHI TAKESHI , HOSHINO YOSHIYUKI
IPC分类号： C02F1/48
摘要： PURPOSE: To remove iron content which was dissolved from main equipment, apparatuses, and line pipes and accoumulated in system water, by subjecting a drain, from a high pressure feed water heater in a power generating plant system, to magnetic separation.
CONSTITUTION: In the system of a power generating plant, feed-water flows through a condenser 2, a plurality of hot wells 3, a condensate line pipe 4, a condensate pump 5, a condensate desalinator 6, a condensate-pressurizing pump 7, low pressure feed-water heaters 8A-8C, a deaerator 9, a water reservoir 10 for the deaerator 9, a feed line pipe 11, a feed-water pump 12 and high pressure feed-water heaters 13A-13C into a boiler 14, to geneate steam, passes through a steam pipe 15, works in a turbine 1 and returns to the condenser 2. In this system, iron dissolves in the system water due to the corrosion of the drain line pipe system of the high pressure feed-water heaters, and deposits and adheres as iron oxide onto a constructional part in the downstream zone. Therefore, a magnetic attraction means is provided in each of the drain pipes 17A-17C to catch and remove the iron oxide.
COPYRIGHT: (C)1982,JPO&Japio
摘要翻译：目的：通过将来自发电厂系统的高压给水加热器的排水口进行磁选分离，除去从主设备，设备和管线中溶解的铁含量，并在系统水中进行累积。构成：在发电厂的系统中，给水流过冷凝器2，多个热井3，冷凝水管4，冷凝水泵5，冷凝物脱水器6，冷凝水加压泵7，低压给水加热器8A-8C，除气器9，用于脱气器9的储水器10，供给管线11，给水泵12和进入锅炉14的高压给水加热器13A-13C，蒸汽蒸汽通过蒸汽管15，在涡轮机1中工作并返回到冷凝器2.在该系统中，由于高压给水的排水管道系统的腐蚀，铁在系统水中溶解加热器，并沉积并作为氧化铁粘附到下游区域的结构部件上。因此，在每个排水管17A-17C中设置磁吸引装置以捕获和除去氧化铁。

27. 发明专利

JPS576350A EARLY INDICATING AND ALARMING DEVICE FOR CREVICE CORROSION 失效
公开(公告)号：JPS576350A
公开(公告)日：1982-01-13
申请号：JP7899480
申请日：1980-06-13
申请人： HITACHI LTD
发明人： OONAKA NORIYUKI , KIKUCHI EIJI , SHIYOUJI SABUROU , MINATO AKIRA
IPC分类号： G01N27/26 , G01N17/00 , G01N17/02
摘要： PURPOSE:To indicate the crevice corrosion of structural materials in an early time by providing the anode and cathode of the same material as that of the structural materials in an actual environment in which the structural materials are placed and measuring the crevice corrosion current generated between the anode and the cathode. CONSTITUTION:A protecting body 40 made of a heat-resistant resin is mounted to a flange 38 for mounting detectors by means of pressure sealing jigs 42, 44 and a corrosion sample 46 of the same materials as that of a structural material which serves as the anode is inserted into this body 40, and a clearance 48 is formed between the body 40 and the sample 46. A flat plate counter electrode 50 of the same material as that of the corrosion sample is mounted, too, to the flange 38. The flange 38 is mounted to a part of the plant structural material and the corrosion sample 46 and the counter electrode 50 are exposed to the corrosive environment of actual machines. The structure equivalent to that of the clearances of the structural material is given by the clearance 48, and therefore if crevice corrosion occurs in the sample 46, electrochemical reaction takes place between the sample 46 and the electrode 50, and the current corresponding to the rate of corrosion flows in a nonresistance ammeter 56.

28. 发明专利

JPS55164081A METHOD FOR PROTECTION OF METAL IN CONTACT WITH WATER FROM CORROSION 失效
公开(公告)号：JPS55164081A
公开(公告)日：1980-12-20
申请号：JP7120179
申请日：1979-06-08
申请人： HITACHI LTD
发明人： HONDA TAKU , MINATO AKIRA , IZUMITANI MASAKIYO , KASHIMURA EIJI , OOSUMI KATSUMI
IPC分类号： G21D1/00 , C23F13/00 , C23F14/00 , C23F15/00 , F28F19/00
摘要： PURPOSE:To protect the metal materials from corrosion by regulating the specific conductivity of water at less than a specific value and also fluidizing the water in a system in which the metal material, e.g., carbon steel, low-alloy steel, etc., are in contact with water into which a specific concentration of oxygen is dissolved. CONSTITUTION:In a corrosion-proof system for metal materials, e.g., carbon steel, low-alloy steel, stainless steel, copper and its alloys, in which the metal material is in contact with the water of 0.04-30ppm dissolved oxygen concentration, e.g., a piping of condensation and water supply systems during the downtime of a boiling water nuclear reactor in particular, the specific conductivity of the water is kept at 0.5mus/cm or less, preferably 0.1mus/cm or less, by lowering it by an ion exchange resin method. Also, the water is fluidized to a flow rate of approx. 0.2-1cm/s or more.

29. 发明专利

JPS5585864A CLOSED CIRCULATING ABSORPTION REFRIGERATING AMCHINE 失效
公开(公告)号：JPS5585864A
公开(公告)日：1980-06-28
申请号：JP15856678
申请日：1978-12-25
申请人： HITACHI LTD
发明人： ITOU MASAHIKO , MIDORIKAWA HEIHACHIROU , MINATO AKIRA
IPC分类号： F25B15/00 , F25B30/04 , F25B47/00

30. 发明专利

JPS5524951A ONEESIDE HOT GALVANIZATION OF STEEL PLATE 失效
公开(公告)号：JPS5524951A
公开(公告)日：1980-02-22
申请号：JP9723678
申请日：1978-08-11
申请人： HITACHI LTD
发明人： MIDORIKAWA HEIHACHIROU , ITOU MASAHIKO , MINATO AKIRA , KUBO MITSURU
IPC分类号： C23C2/02
摘要： PURPOSE:To manufacture one-side galvanized steel plate which is excellent in adhesion by the procedure in which a non-plating agent containing ZrO2 as the main component is coated on the one side of a steel plate and then the steel plate is baked by heating and passed through a hot galvanization bath. CONSTITUTION:The surface of a steel plate to be treated os cleansed by deoiling and then coated one-sidedly with a non-plating agent which is prepared by mixing and dispersing a mixture of ZrO2 fine power as the main component and an appropriate amount of at least one of Al2O3, SiO2, CaO, BaO, TiO2, MgO, NiO2, and V2O3 fine powder in an organic solvent or hydrocarbon containing a resin and a fat. The steel plate coated with the non-plating agent is dried in the air and baked, in which resin, fats, and hydrocarbon compounds present in non-plating agent are burned incompletely for carbonization and ZrO2 fine powders, etc., are adhered closely to the steel plate. Then, the steel plate is passed through a hot galvanization bath to obtain a complete one-side plated steel plate. Finally, non-plating agent adhered to the steel plate is removed by blushing or roll.

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