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    Descaling system for the cooling water tubes of a steam condenser
    9.
    发明授权
    Descaling system for the cooling water tubes of a steam condenser 失效
    蒸汽冷凝器冷却水管除垢系统

    公开(公告)号：US3978917A

    公开(公告)日：1976-09-07

    申请号：US503315

    申请日：1974-09-05

    申请人： Yoshio Honma ,  Junichi Takahashi

    发明人： Yoshio Honma ,  Junichi Takahashi

    IPC分类号： F28G1/12 ,  F28G1/00

    CPC分类号： F28G1/12

    摘要： Descaling elements for cleaning cooling water tubes within a steam condenser are received within a water soaking vessel. A wire net is stretched within said vessel, and said vessel is charged with water until the water level reaches a predetermined limit line above said wire net. The presence of the wire net prevents the descaling elements from being floated up to the water surface. A considerably large space is formed between the water surface and the ceiling of the vessel. Said space communicates with an evacuating device for deaerating the interior of the vessel, and no air filter or air separator is required for said evacuating device.BACKGROUND OF THE INVENTIONThis invention relates to the heat exchanging tubes of a heat exchanger, and more particularly to a descaling system for cleaning the cooling water tubes of a steam condenser, and further in detail to a descaling system for removing substances deposited on the inner walls of the cooling water tubes of a steam condenser by continuously forcing a large number of descaling elements such as water-soaked sponge balls through said tubes.As above described, a descaling system is known which uses water-holding descaling elements for the purpose of cleaning the steam condenser tubes. For example, in the known descaling system a circulation passageway for passing descaling elements therethrough connects with the cooling water inlet pipe and outlet pipe of a steam condenser. In the course of said passageway a water-soaking vessel within which descaling elements are received and which is charged with cooling water is provided. Said vessel is provided with an evacuating device for evacuating the vessel interior up to a prescribed vacuum level. Said evacuating device is generally provided with plural deaeration valves and vacuum pump or air ejector and, in addition, provided with an air filter or air separator for removing water so as to prevent it from entering said pump or ejector.The above-mentioned descaling system has the drawbacks that all of the descaling elements can not be evenly, fully soaked with water because many of the descaling elements are floated up to the proximity of the water surface within the vessel; and a water separator or filter should be provided and the piping line should also be of water-resistant quality because when the vessel interior is deaerated by the evacuating device, water is also soaked into the piping line of said device, resulting in a complicated construction of the evacuating device and an increase in its manufacturing cost.SUMMARY OF THE INVENTIONThe general object of the invention is to provide an improved descaling system eliminating the drawbacks in the foregoing conventional descaling system.In the descaling system of the invention, a wire net is stretched within a water-soaking vessel having descaling elements received therein; said descaling elements are received below said wire net; said vessel is charged with water up to a predetermined limit line above the wire net; said wire net is in a state always immersed in water during the water soaking operation for the descaling elements; and a considerably large volume of space is provided in the upper part of the vessel interior and the water within the vessel has a free surface.Accordingly, in the descaling system of the invention, when the water-soaking vessel is deaerated by an evacuating device associated with said vessel, there is a reduced possibility of water being entered into the piping line of said device because of the presence of a considerably large volume of space. As the result, the necessity of providing a water filter or water separator within said device is reduced, offering the advantage of attaining the manufacturing cost reduction of the evacuating device.Since the descaling elements are prevented from being floated on the water surface by the wire net, they are fully immersed in the water, offering the advantage of reliably enabling the water soaking.Accordingly, an object of the invention is to provide a descaling system low in manufacturing cost.Another object of the invention is to provide a descaling system enabling the water soaking operation for the descaling elements to be reliably carried out, thereby attaining a good descaling effect.A still another object of the invention is to provide a descaling system enabling the water soaking operation for the descaling elements to be carried out for a short time with high efficiency.

    摘要翻译： 用于清洁蒸汽冷凝器内的冷却水管的除垢元件被接纳在水浸泡容器内。 电网在所述容器内拉伸，所述容器用水充电直到水位达到所述金属丝网上方的预定极限线。 丝网的存在防止除垢元件浮在水面上。 在水面和容器的天花板之间形成相当大的空间。 所述空间与用于对容器内部进行脱气的排气装置连通，并且所述抽空装置不需要空气过滤器或空气分离器。