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Switch heat exchanger temporarily closed after the operation of parking


The temperature change is reduced to a minimum, specific methods of operation are: (1) off one tower valve TG. 101, switching off the tower and lower heat exchangers; (2) Close QO. 101 ~ l10 switching valve, switching off the channel heat exchanger and the outside world. Also stopping supply of instrument air source is nitrogen compressor to ensure that switching valve closed; (3) manually shut down the oxygen and nitrogen products, valve DX. 101-106 and products entering and leaving, blowdown valve QO. 115 ~ l18, to prevent the outflow of cooling tower; (4) If the pressure is high on the tower, the tower slightly to open the emergency relief valve on the PF. 137, to prevent overpressure. (5) If you need to be overhauled to switch Yan to open the site in the slag wool blocked by ※ ※ reduce the cooling capacity spillover. 3 the effect of closed operations at the temporary stop using this method several times, and closed operations earlier than do, the effect is very obvious. About 3 hours before stopping, switch the central temperature and the heat exchanger hot side temperature will be reduced to a 170 ℃,[link widoczny dla zalogowanych], respectively,[link widoczny dla zalogowanych], and a 20 ℃, while the cold end temperature is about 140 ℃ rise to a start the recovery time of about 2.5 hours , and parking longer the more hot-side temperature drop is low, start the recovery more difficult. But in 1995,[link widoczny dla zalogowanych], transformation of plant water system, due to the use of closed operation, despite the parking up to 36 hours, switching the cold heat exchanger phenomenon has not occurred, and the central temperature is 70 ℃ rise to a hot side temperature of basic constant cold end temperature rise to a 155cc, start the recovery time of only 8 hours. Switch closed heat exchanger operation is summed up from the lessons learned, and after practice we have repeatedly proved that closed the operation was successful ※ Fujian Sanming Steel Group 10000m. / H (oxygen) air separation unit performance assessment by oxygen by a Hangzhou Science and Technology Co., Ltd. design and manufacture of the Fujian Sanming Iron and Steel (Group) Co., Ltd. 1000Om3 / h (oxygen) air separation unit, in the three steel units installed HangYang ugly close collaboration and under the strong voice. In May 2001 and the heavy atmosphere of oxygen one debugging, after three months of trial operation, equipment operation almost steady, at August 11,[link widoczny dla zalogowanych], 2001 passed the performance test. The results in Table. Three steel 100 (30ln3 / h (oxygen) air separation plant with structured packing on the tower and the whole distillation hydrogen {6I 氲 technology, without refrigeration machines, 12 sets of oxygen is hang a new generation of medium-sized pass the examination ASU . The two sides agreed that: three steel 100 (30 / h (oxygen) air separation equipment design platform management. technologically advanced, {6I made of good quality. In particular, pay attention to the equipment timber, complete sets of equipment running smoothly, fully reflects the oxidation in air separation industry strength. Hangzhou Sanming Zhou Zhiyong oxygen Sales Service Steel Company ) 199 equivalent to the purity of gaseous oxygen stain (%) 99.699.7 chlorine (/ h) l0 iv 1100O chlorine purity (x10O2) 202 Officer Dick Grant, president of the Asia Pacific region and exercise discretion in process system 8 Blythe Houge Shi and his party visited the Nanjing Yangzi Petrochemical Company, the two sets for the construction of 40000 ~ 5000 (~ 3 / h air separation unit and had friendly talks on issues. After careful and meticulous investigation and negotiations, the Nanjing Yangtze Petrochemical Company and the United Kingdom I] OC integrated gas company in Yamba ASU project engineering support as well as future ship construction aspects of industrial gas supply station for the relationship established. In 2001 June 6 ,[link widoczny dla zalogowanych], the two sides signed in Beijing a memorandum of understanding. Mr. Grant promise. British gas company BOC to provide ship technology and production facilities in Nanjing Yangzi Petrochemical Company can give the most satisfactory service to this set of four 0o50000 / h air separation plants the use of the world's most advanced technology, making it the gas products in the market the most competitive and good value for money. British flOE gas company is the world's leading gas company the second largest in the world, more than 60 countries and regions with sub- companies or business institutions. In China, Tianjin, Shanghai, Suzhou, Nanjing and other places with ugly air-separation equipment. (210O35, Nanjing Dachang Qu) of sets of Nanjing South Division chloride fertilizer plant Jiang Zhenhai cryogenic technology in 2001 CryogenicTeehnoIogy № 4 42001'29 '

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