Ebara Corporation

Ube Industries, Inc.

Other

Hiroyuki Fujimura

Takahiro Oshita

Tetsuhisa Hirose

Kazuo Takano

Shosaku Fujinami

Masaaki Irie

Shuichi Nagato

Yoshio Hirayama

Toshio Fukuda

Takayuki Suzuki

Norio Yamada

Yoshiyuki Ichiki

Masahiro Izutsu

Takahiro Ohshita

Kanichi Ito

Akihiko Maezawa

Hideo Hayashi

Akira Uchino

Chi Matsumura

High-purity hydrogen is recovered from a pyrolysis gas, composed mainly of hydrogen and carbon monoxide, produced by pyrolysis of an organic material such as biomass. A method for producing such high-purity hydrogen includes supplying a reducing gas produced by pyrolysis of an organic material to an anode side of a high-temperature steam electrolyzer having a diaphragm comprising solid oxide electrolyte; and supplying steam to a cathode side of the high-temperature steam electrolyzer to produce hydrogen and oxygen by electrolytic action. The oxygen produced in the cathode side of the high-temperature electrolyzer passes through the diaphragm and reacts with the reducing gas to create concentration gradient of oxygen ion, thus lowering electrolysis voltage.

Method and apparatus for producing high-purity hydrogen

An apparatus for treating wastes includes a fluidized bed reactor for partially combusting the wastes at a relatively low temperature, and a separate relatively high temperature reactor for separate gasification of gaseous material and char from the first gasification. This synthesis gas thus formed is cooled, subjected to a conversion operation in a converter to produce hydrogen.

Apparatus for treating wastes by gasification

A method and apparatus for treating wastes by gasification recovers useful resources including energy, valuables such as metals, and gases for use as synthesis gas for chemical industries or fuel. The wastes are gasified in a fluidized-bed reactor at a relatively low temperature. Gaseous material and char produced in the fluidized-bed reactor are introduced into a high-temperature combustor, and low calorific gas or medium calorific gas is produced in the high-temperature combustor at a relatively high temperature. The fluidized-bed reactor preferably is a revolving flow-type fluidized-bed reactor. The high-temperature combustor preferably is a swirling-type high-temperature combustor.

Method and apparatus for treating wastes by gasification

The present invention relates to a waste carbonization method which produces charcoal and/or activated carbon from solid wastes, such as wood waste, and renders produced gas completely harmless. Solid wastes B are exposed to gas generated in pyrolysis gasification of other wastes A in a gasification furnace 1 to produce charcoal and/or activated carbon from the solid wastes B.

Method for carbonizing wastes

A method for flue gas desulfurization in which sulfur oxides in the flue gas are converted into powdery ammonium compound, including providing an aqueous ammonia spraying device configured to atomize aqueous ammonia into droplets, cooling flue gas containing sulfur oxides down to a temperature between a saturation temperature of water and 80&deg; C., adjusting the aqueous ammonia spraying device such that the aqueous ammonia is atomized into droplets having a Sauter mean diameter of 0.5 &mgr;m to 30 &mgr;m, and spraying the aqueous ammonia into the flue gas which has been cooled in the cooling step.

Method and apparatus for flue gas desulfurization

A method and apparatus for treating wastes by two-stage gasification recovers metals or ash content in the wastes in such a state that they can be recycled, and gases containing carbon monoxide (CO) and hydrogen gas (H ) for use as synthesis gas for ammonia (NH ) or production of hydrogen gas. The wastes are gasified in a fluidized-bed reactor at a low temperature. Then, gaseous material and char produced in the fluidized-bed reactor are introduced into a high-temperature combustor, and gasified at a high temperature and ash content is converted into molten slag. After water scrubbing and a CO conversion reaction, the gas is separated into H and residual gas. The residual gas is then supplied to the fluidized-bed reactor as a fluidizing gas.

A method of treating wastes includes partially combusting the wastes in a fluidized bed reactor at a relatively low temperature followed by separate gasification of gaseous material and char from the first gasification in a separate relatively high temperature reactor. This forms synthesis gas that is cooled, subjected to a conversion operation to produce hydrogen.

Method for treating wastes by gasification

A method and apparatus for treating wastes by two-stage gasification recovers metals or ash content in the wastes in such a state that they can be recycled, and gases containing carbon monoxide (CO) and hydrogen gas (H.sub.2) for use as synthesis gas for ammonia (NH.sub.3) or production of hydrogen gas. The wastes are gasified in a fluidized-bed reactor at a low temperature. Then, gaseous material and char produced in the fluidized-bed reactor are introduced into a high-temperature combustor, and gasified at a high temperature and ash content is converted into molten slag. After water scrubbing and a CO conversion reaction, the gas is separated into H.sub.2 and residual gas. The residual gas is then supplied to the fluidized-bed reactor as a fluidizing gas.

A method and apparatus for treating wastes by gasification recovers metals or ash content in the wastes in such a state that they can be recycled, and gases containing carbon monoxide (CO) and hydrogen (H.sub.2) for use as synthesis gas of ammonia (NH.sub.3). The wastes are gasified in a fluidized-bed reactor at a relatively low temperature, and gaseous material and char produced in the fluidized-bed reactor are introduced into the high-temperature combustor. The synthesis gas is produced in the high-temperature combustor at a relatively high temperature, CO and H.sub.2 O in the synthesis gas is converted into CO.sub.2 and H.sub.2, and then H.sub.2 is recovered by removing CO.sub.2.

In an improved method of treating foul water, the solids that are produced during the process of treatment of foul water such as wastewater or liquid sludges are treated with a heat treatment apparatus and the resulting thermal energy and/or gas is utilized in the treatment of said foul water. The foul water may be subjected, directly and/or after a treatment, to a filtration step using a filter packed with nonflammable particulate matter such as sand, and the trapped solids are fed into a fluidized-bed heat treatment apparatus such as a fluidized-bed incinerator or gasification furnace and, thereafter, the nonflammable particulate matter in the heat treatment apparatus is returned to the filtration step. The foul water can be treated with effective utilization of the energy of the organic matter in the foul water or the solids that are produced during the process of its treatment.

Method of treating foul water

The improved method of treating an exhaust gas from a combustion apparatus comprises adding ammonia to the exhaust gas and then irradiating it with an electron beam, characterized in that part or all of said ammonia is supplied as a separated portion of ammonia-containing water. The ammonia-containing foul water may contain feces excreted from humans and/or domestic animals and poultry, fermentation industry liquid waste or food processing wastewater. The organic waste-containing water may be digested anaerobically to convert the organic matter to methane gas and, subsequently, ammonia is separated from the supernatant liquor and used as the source of ammonia to be supplied. The methane gas is suitably used as a source of energy for the combustion apparatus. At least part of the organic matter in the organic foul water may be decomposed oxidatively and, subsequently, ammonia is separated for use as the source of ammonia to be supplied. The method is capable of simultaneous treatment of the exhaust gas and the ammonia-containing water in an efficient economical manner.

Growing community of inventors

Tokyo, Japan

Hiroyuki Fujimura