Hitachi Zosen Corporation

Hitachi Shipbuilding and Engineering Co., Ltd.

Toshio Hama

Kenichi Nagai

Yoshitoshi Sekiguchi

Kenji Yasuda

Tadashi Moriyama

Osamu Nakanishi

Toshio Tachibana

Masayoshi Ichiki

Hideya Inaba

Yasumi Kamino

Michio Ishida

Shigenori Onitsuka

Yoshimasa Miura

Kazuo Maeda

Michio Ito

Etsuo Ogino

Teruhiko Kawanabe

Teruyuki Doi

A thermal decomposition apparatus for plastics wherein plastics are melted and thermally decomposed, and the resulting decomposition gas is cooled for condensation and recovered in the form of a thermal decomposition oil. The apparatus comprises a thermal decomposition reactor for melting and thermally decomposing the plastics therein, an extraneous matter discharge duct having one end opened in a melt of plastics within the reactor, an extraneous matter collecting container connected to the other end of the discharge duct, and an aspirator for aspirating extraneous matter within the reactor together with the melt through the discharge duct into the container.

Apparatus for thermally decomposing plastics and process for converting

The invention provides a furnace desulfurization process which includes supplying a desulfurizing agent into a furnace or flue to cause the agent to absorb SO.sub.2 from the exhaust gas, the desulfurizing agent being a salt obtained by at least partly neutralizing a Ca desulfurizing agent with an acid; a furnace desulfurization process which includes supplying a Ca desulfurizing agent into a furnace or flue to effect a first-stage desulfurization reaction, collecting ash containing a waste of the agent having an unreacted substance enclosed therein from the exhaust gas, adding an acid to the collected ash to at least partly neutralize the unreacted portion of the agent, and recycling the ash containing the resulting salt into the furnace or flue to effect a second-stage desulfurization reaction; a dry simultaneous desulfurization-denitration process which includes supplying a Ca desulfurizing agent into a furnace or flue to effect a desulfurization reaction, collecting ash containing a waste of the agent having an unreacted substance enclosed therein from the exhaust gas, adding a denitrating reducing agent to the collected ash, and recycling the ash containing the waste desulfurizing agent and the reducing agent into the furnace or flue to effect desulfurization and denitration reactions; and a dry simultaneous desulfurization-denitration process which includes supplying a Ca desulfurizing agent into a furnace or flue to effect a desulfurization reaction, collecting ash containing a waste of the agent having an unreacted substance enclosed therein from the exhaust gas, adding an acid to the collected ash to at least partly neutralize the unreacted substance, adding a denitrating reducing agent to the ash containing the resulting salt, and recycling the ash containing the salt and the reducing agent into the furnace or flue to effect desulfurization and denitration reactions.

Dry processes for treating combustion exhaust gas

A highly active denitrating catalyst is produced by converting the surface layer of steel material to an aluminum alloy, treating the resulting steel material with an aluminum dissolving solution to dissolve out the aluminum and to render the surface layer porous, and immersing the steel material having the porous surface layer in a solution containing a vanadium compound to cause the porous surface layer to support the vanadium compound.

Process for producing highly active denitrating catalysts

Growing community of inventors

Nishinomiya, Japan

Toshio Hama