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公开(公告)号：US5006304A
公开(公告)日：1991-04-09
申请号：US424879
申请日：1989-10-20
申请人： Richard D. Franklin , Gregg D. Auld , David E. Murray , John J. Lescisin , Albert R. Vaia , Thomas E. Dunn
发明人： Richard D. Franklin , Gregg D. Auld , David E. Murray , John J. Lescisin , Albert R. Vaia , Thomas E. Dunn
CPC分类号： F28G7/00 , F22B37/483
摘要： A method for loosening and removing sludge and debris from the vessel of a heat exchanger, such as the secondary side of a nuclear steam generator, is disclosed herein. The method generally comprises the steps of providing a sufficient volume of a liquid, such as water, into the steam generator so that the lower portion which includes the tubesheet is submerged, and then generating a succession of pressure pulses within the water from one or more pressure pulse generators wherein each pressure pulse creates shock waves that exert momentary forces throughout the submerged portion of the generator of a magnitude sufficient to loosen the sludge and debris, but safely below the yield and fatigue limits of the heat exchanger tubes and other components within the generator. The pressure pulses commence as soon as a sufficient amount of water is introduced into the steam generator to submerge the tubesheet, and continue all the way through the draining of the steam generator.
摘要翻译： 本文公开了一种从热交换器的容器（例如核蒸汽发生器的次级侧）松开和去除污泥和碎屑的方法。 该方法通常包括以下步骤：向蒸汽发生器提供足够体积的液体，例如水，使得包括管板的下部被浸没，然后在水中产生一系列压力脉冲，从一个或多个 压力脉冲发生器，其中每个压力脉冲产生冲击波，其在发生器的整个浸没部分施加瞬时力，其量值足以使污泥和碎屑松动，但安全地低于热交换器管和其内的其它部件的屈服和疲劳极限 发电机。 一旦将足够量的水引入蒸汽发生器中以淹没管板，则压力脉冲开始，并且一直持续通过蒸汽发生器的排放。
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公开(公告)号：US4921662A
公开(公告)日：1990-05-01
申请号：US183874
申请日：1988-04-19
申请人： Richard D. Franklin , Gregg D. Auld , David E. Murray , John J. Lescisin , Albert R. Vaia , Thomas E. Dunn
发明人： Richard D. Franklin , Gregg D. Auld , David E. Murray , John J. Lescisin , Albert R. Vaia , Thomas E. Dunn
CPC分类号： F28G7/00 , F22B37/483
摘要： A method for loosening and removing sludge and debris from the vessel of a heat exchanger, such as the secondary side of a nuclear steam generator, is disclosed herein. The method generally comprises the steps of providing a sufficient volume of a liquid, such as water, into the steam generator so that the lower portion which includes the tubesheet is submerged, and then generating a succession of pressure pulses within the water from one or more pressure pulse generators wherein each pressure pulse creates shock waves that exert momentary forces throughout the submerged portion of the generator of a magnitude sufficient to loosen the sludge and debris, but safely below the yield and fatigue limits of the heat exchanger tubes and other components within the generator. The pressure pulses commence as soon as a sufficient amount of water is introduced into the steam generator to submerge the tubesheet, and continue all the way through the draining of the steam generator.
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3.发明授权System and method for vertically flushing a steam generator during a shock wave cleaning operation 失效在冲击波清洗操作期间垂直冲洗蒸汽发生器的系统和方法
公开(公告)号：US5019329A
公开(公告)日：1991-05-28
申请号：US456436
申请日：1989-12-26
CPC分类号： F28G7/00 , F22B37/483
摘要： Both a system and a method for removing sludge and debris from the interior of the secondary side of a nuclear steam generator is disclosed. The method comprises the steps of introducing a sufficient amount of water in the secondary side to submerge at least the tubesheet, generating a succession of shock waves in the water by means of pulses of pressurized gas to create shock waves that loosen the sludge and debris, and vertically flushing the interior of the secondary side by suctioning water off from the bottom portion of the steam generator while simultaneously forcefully spraying water from the top portion of the generator over the bundle of heat exchanger tubes in order to remove the sludge and debris loosened by the shock waves. To conserve the water used in the flushing operation, the water that is suctioned off from the bottom portion of the steam generator is filtered and de-ionized and re-introduced through hoses at the top portion of the generator which forcefully directs water downwardly through the bundle of heat exchanger tubes and against the tubesheet. The invention greatly enhances the effectiveness of pressure pulse, water slap and water cannon cleaning methods in the secondary sides of nuclear steam generators.
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公开(公告)号：US4899697A
公开(公告)日：1990-02-13
申请号：US183199
申请日：1988-04-19
CPC分类号： F28G7/00 , F22B37/483
摘要： An apparatus for loosening and removing sludge and other impurities from the interior of a heat exchanger vessel which may be the secondary side of a nuclear steam generator is disclosed herein. The apparatus generally comprises a nozzle having a first end that is detachably mountable into an access opening such as a sludge lance port in the secondary side of the generator, and a second end that extends into the interior of the secondary side at a 30 degree downward angle relative to the tubesheet in the vessel for minimizing the stresses applied to the heat exchanger tubes, and for uniformly reflecting the pulse back up toward the upper portions of the secondary side. A pulse generator is operably connected to the nozzle which has a controller for controlling the power level of the pulses generated. To further minimize such peak tube stresses, the pulse generator includes a pulse flattener, and the second end of the nozzle is aligned down the main tube lane.
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公开(公告)号：US5092280A
公开(公告)日：1992-03-03
申请号：US392272
申请日：1989-08-10
CPC分类号： F28G7/00 , F22B37/483
摘要： An apparatus for loosening and removing sludge and other impurities from the interior of a heat exchanger vessel which may be the secondary side of a nuclear steam generator is disclosed herein. The apparatus generally comprises a nozzle having a first end that is detachably mountable into an access opening such as a sludge lance port in the secondary side of the generator, and a second end that extends into the interior of the secondary side at a 30 degree downward angle relative to the tubesheet in the vessel for minimizing the stresses applied to the heat exchanger tubes, and for uniformly reflecting the pulse back up toward the upper portions of the secondary side. A pulse generator is operably connected to the nozzle which has a controller for controlling the power level of the pulses generated. To further minimize such peak tube stresses, the pulse generator includes a pulse flattener, and the second end of the nozzle is aligned down the main tube lane.
摘要翻译： 本文公开了一种用于从可能是核蒸汽发生器的二次侧的热交换器容器的内部松开和去除污泥和其它杂质的装置。 该装置通常包括喷嘴，该喷嘴具有可拆卸地安装到诸如发生器的次级侧中的污泥喷枪端口的进入开口中的第一端，以及在向下30度延伸到次级侧内部的第二端 相对于容器中的管板的角度来最小化施加到热交换器管的应力，并且用于将脉冲均匀地反射回次级侧的上部。 脉冲发生器可操作地连接到喷嘴，该喷嘴具有用于控制所产生的脉冲的功率电平的控制器。 为了进一步最小化这种峰值管应力，脉冲发生器包括脉冲平压器，并且喷嘴的第二端沿主管道对齐。
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6.发明授权
公开(公告)号：US5154197A
公开(公告)日：1992-10-13
申请号：US772137
申请日：1991-10-09
摘要： An improved method for removing sludge and corrosion products from the interior of a heat exchanger vessel, such as a nuclear steam generator, which comprises the steps of generating a series of pressure pulses within a liquid chelate-containing chemical cleaning agent after the agent has been introduced into the interior of the vessel to create shock waves in the liquid for dislodging, dissolving and fluidizing sludge and corrosion products. The liquid chemical cleaning agent is removed from the vessel after only about 10 to 70 percent of what would have been its normal residence time without the pressure pulses. The method further includes the steps of simultaneously recirculating the chemical cleaning agent through a filter assembly during the pressure pulsing operation in order to remove fluidized sludge and corrosion products dislodged by the pressure pulsing, thereby affording them no opportunity to resettle back onto the surfaces of the heat exchanger vessel and interfere with the chemical cleaning of the vessel. The method reduces not only the time required for a particular chemical cleaning agent to effectively clean the vessel, but further reduces the number of times such chemicals need to be introduced into the vessel, which in turn results in the production of less radioactive liquid waste products.
摘要翻译： 一种用于从诸如核蒸汽发生器的热交换器容器的内部去除污泥和腐蚀产物的改进方法，其包括以下步骤：在所述试剂已经在所述液体螯合物的化学清洗剂之后产生一系列压力脉冲 引入容器的内部，以在液体中产生冲击波，用于移除，溶解和流化污泥和腐蚀产物。 只有在没有压力脉冲的情况下，其正常停留时间的大约10％至70％，液体化学清洗剂才从容器中取出。 该方法还包括以下步骤：在压力脉动操作期间同时使化学清洁剂再循环通过过滤器组件，以便除去由压力脉冲移出的流化淤渣和腐蚀产物，从而使它们无机会重新回到 热交换器容器并干扰容器的化学清洗。 该方法不仅减少了特定化学清洁剂有效清洁容器所需的时间，而且进一步减少了这种化学品需要引入容器的次数，从而导致产生较少的放射性废液产品 。
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