Mitsubishi Heavy Industries Limited

Hitachi, Ltd.

Yudai Kato

Kazuo Ishida

Fumiaki Sato

Shinji Ogino

Seiji Kakesako

Motonari Aihara

Hiroyuki Furuichi

Kentaro Nakamura

Atsuhiro Yukumoto

Haruaki Hirayama

Takahiro Hamada

Kouji Horizoe

Junya Sawazaki

Noriko Takaya

Hiroyuki Furuich I

Provided is a word processing system which includes: a first generation unit which generates, based on sentence information including a plurality of sentences, hierarchy data indicating syntax tree data for each hierarchy with regard to each sentence; a second generation unit which acquires, from a plurality of hierarchy data generated by the first generation unit, hierarchy data of a second sentence similar to hierarchy data of a first sentence generated by the first generation unit, extracts a difference between the hierarchy data of the first sentence and the hierarchy data of the second sentence, and generates, as paraphrasing rule data, first expression data as a difference in the first sentence and second expression data as a difference in the second sentence; and a storage unit which stores the paraphrasing rule data generated by the second generation unit in a storage unit.

Word processing system and word processing method

The present invention is intended to provide a gas purification apparatus and a gas purification method with an excellent thermal efficiency and capable of degrading COS at a high degradation rate. A gas purification apparatus configured to purify gas at least including COS, HO, CO, and HS includes a COS treatment device which is provided with a COS conversion catalyst and configured to treat and degrade COS in the gas by hydrolysis, and HO adjustment means configured to adjust the concentration of HO in the gas to be introduced into the COS treatment device.

Gas purification apparatus and gas purification method

A degradant concentration measurement deviceaccording to the invention has an electric conductivity measurement instrumentA measuring the electric conductivity of a lean solutionthat is an acidic gas-absorbing solution and detection meansobtaining the concentration of a degradant contained in a lean solutionfrom the measured electric conductivity of the lean solutionbased on the relationship between the previously-obtained electric conductivity of the lean solutionand the concentration of the degradant contained in the lean solution

Degradant concentration measurement device and acidic gas removal device

A method and system for recovering COfrom gasification gas, prevents the recovered COfrom being contaminated with COS, without repeating cooling and heating operations and without increasing the steam consumption. Gasification gas being produced in a gasifierand containing CO, CO, COS and HS is subjected to dust removal in a scrubber. Then, a part of the gas is subjected to a CO shift reaction, in which CO is converted into CO, in a CO shift reactor. Another part of the gasification gas is not subjected to the CO shift reaction by means of a bypass, and is mixed with the gas after the CO shift reaction. Thereby, the temperature of the mixture gas is set at 180&#xb0; C. to 300&#xb0; C., and COS in the mixture gas is converted into HS in a COS converter

[object Object]

A method includes a first step of, with a CO.HS stripper maintained to have a pressure higher than atmospheric pressure, from the ammonia-containing wastewater, discharging COand HS in a form of gas having a low moisture concentration from a tower top of the CO.HS stripper while discharging an ammonia-containing solution from a tower bottom of the CO.HS stripper; a second step of introducing the ammonia-containing solution obtained after the first step into an ammonia stripper which is maintained to have a lower pressure than that of the CO.HS stripper, and thereby discharging a gas rich in ammonia containing a small amount of HS and COfrom a tower top of the ammonia stripper while discharging water usable as industrial water from a tower bottom of the ammonia stripper; and a third step of introducing the ammonia rich gas obtained after the second step into a washing tower which is maintained to have a lower pressure than that of the ammonia stripper, and thereby discharging a wastewater containing a Na compound from a tower bottom of the washing tower while discharging a HS-free gas rich in ammonia from a tower top of the washing tower.

Ammonia recovery device and recovery method

A method and system for recovering COfrom gasification gas, prevents the recovered COfrom being contaminated with COS, without repeating cooling and heating operations and without increasing the steam consumption. Gasification gas being produced in a gasifierand containing CO, CO, COS and HS is subjected to dust removal in a scrubber. Then, a part of the gas is subjected to a CO shift reaction, in which CO is converted into CO, in a CO shift reactor. In one embodiment, part of the gasification gas is not subjected to the CO shift reaction by means of a bypass, and is mixed with the gas after the CO shift reaction. Thereby, the temperature of the mixture gas is set at 180&#xb0; C. to 300&#xb0; C., and COS in the mixture gas is converted into HS in a COS converterIn another embodiment, the part of the gasification gas not subjected to the CO shift reaction by means of a bypass, is subjected to heat exchangewith the shifted gas stream and converted in a COS converterprior to mixing with the shifted gas.

A method and an apparatus for separating acidic gases from syngas are capable of reducing the necessary power and are capable of obtaining high-purity COat a high recovery ratio. A purification method and a purification system of coal gasification gas using the method and the apparatus are also provided. An apparatus for separating acidic gases from syngas containing acidic gases of C02 and H2S, in order, converts CO in the syngas into C02, removes H2S contained in the syngas by using a solvent for physical absorption, removes physical solvent from the syngas followed by heating in a heat exchanger using the converted syngas heat, and removes C02 from the heated syngas by using a solvent for chemical absorption.

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Tokyo, Japan

Yudai Kato