Hitachi, Ltd.

The Tokyo Electric Power Company, Incorporated

Hitachi Machinery and Engineering, Ltd.

Yasuo Fujitani

Iwao Harada

Katsumoto Otake

Yoshio Sumiya

Shigeo Oda

Hiroshi Satoh

Michihiko Aizawa

Takuya Sasaki

Katsuhei Tanemura

Keizo Ishida

Toshimasa Shimada

Tokunori Matsushima

Hideki Kon

Makoto Yanagihara

Toshihiko Kaneko

A steam condenser according to the present invention has a tube nest which has a massed region of cooling tubes and a plurality of tube bundles with flow passages. A noncondensable gas extracting tube is arranged among the cooling tubes in the massed region. A cooling unit or a steam condensing chamber for condensing steam contained in noncondensable gases which are extracted from the noncondensable gas extracting tube is arranged in the massed region. A discharge flow passage is formed at least partially in the tube next so as to enable the noncondensable gases from the cooling unit or the steam condensing chamber to be discharged outside of the condenser, whereby condensing efficiency of the steam contained in the noncondensable gases which flow into the cooling unit or the steam condensing chamber is improved.

Condenser and power plant

A tube nest of a compact condenser has flow passages, tube bundles and a noncondensable gas extracting opening. The tube nest is installed in a vessel having a bottom surface. The tube nest is spaced from the bottom surface and the side walls of the vessel so that stream is able to flow from every direction into the tube nest at a reduced steam velocity. The extracting opening is disposed below the center of gravity of the outer circumference, and the plurality of flow passages extend from the outer circumference toward the extracting opening. Each flow passage has open outer end on the outer circumference and the width of each flow passage increases toward the open outer end. The area ratio and the length of the flow passage increase toward the center axis of the tube nest. The result is a compact condenser capable of reducing pressure loss and of efficiently removing noncondensable gas.

An apparatus for collecting cleaning bodies in a tubular heat exchanger capable of collecting the cleaning bodies with a high collection efficiency against the temporary introduction of a large amount foreign matter such as falling tools in a cooling water system and against the deflected flow of the cooling water from the upstream side. A rectifying member rectifies or regulates the deflected flow of the cooling water from the upstream side whereby it is possible to collect the cleaning bodies without any adhesion and stagnation of the cleaning bodies in the cooling water on V-shaped collection lattices. It is also possible to trap a large article such as a falling tool between a guide member disposed downstream of the collection lattices and the collection lattices, and to introduce only the cleaning bodies into the guide member. Furthermore, the downstream port of a cleaning body discharge pipe opens toward the downstream side to thereby prevent the clogging of the port with the foreign matter or the like.

Apparatus for collecting cleaning bodies for tubular heat exchanger

A heat exchanger for condensing into liquid phase a vapor containing non-condensable gas components through heat exchange with a heat exchanging medium has a vessel having a vapor inlet for receiving the vapor containing the non-condensable gas components and a discharge port for the non-condensable gas components. The heat exchanger further has a tube nest disposed in the vessel and having a plurality of tubes through which the heat exchanging medium flows. The vapor containing non-condensable gas components flows towards the discharge port across the tube nest so as to be condensed into liquid phase through heat exchange with the heat exchanging medium flowing through the tubes, so that the non-condensable gas components are separated from the liquid phase and flow towards the discharge port. The tube nest is constructed to create a change in the dynamic pressure of flow of the vapor towards the discharge port to cause such a static pressure distribution in the heat exchanger that a lower static pressure is established in a region where the discharge port is provided than in a region where the vapor inlet is provided.

Heat exchanger for condensing vapor into liquid phase, power generating

A device for cleaning inner surfaces of heat exchanger tubes including a pair of main cleaning device bodies each having a moving device and a brush driving device disposed on opposite tube plates on which each opened end of the heat exchanger tubes is disposed. At least one of the pair of main cleaning devices is provided with a cleaning brush changing device, and each brush driving devices is made to correspond to the opened end of the same heat exchanger tube so that pressurized fluid is alternately supplied to each of the corresponding brush driving device from a pressurized fluid supplying unit and thereby the cleaning brush is moved. As a result of this, only one cleaning brush can clean a multiplicity of heat exchanger tubes. Furthermore, since a brush changing device is provided, the cleaning brush can be at need replaced by fresh one so that a further number of heat exchanger tubes can be cleaned.

Device for cleaning inner surfaces of heat exchanger tubes

Growing community of inventors

Tokai-mura, Japan

Yasuo Fujitani